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Diffstat (limited to 'gdb/breakpoint.c')
-rw-r--r-- | gdb/breakpoint.c | 7809 |
1 files changed, 0 insertions, 7809 deletions
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c deleted file mode 100644 index b88f674..0000000 --- a/gdb/breakpoint.c +++ /dev/null @@ -1,7809 +0,0 @@ -/* Everything about breakpoints, for GDB. - - Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, - 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software - Foundation, Inc. - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include "defs.h" -#include <ctype.h> -#include "symtab.h" -#include "frame.h" -#include "breakpoint.h" -#include "gdbtypes.h" -#include "expression.h" -#include "gdbcore.h" -#include "gdbcmd.h" -#include "value.h" -#include "command.h" -#include "inferior.h" -#include "gdbthread.h" -#include "target.h" -#include "language.h" -#include "gdb_string.h" -#include "demangle.h" -#include "annotate.h" -#include "symfile.h" -#include "objfiles.h" -#include "linespec.h" -#include "completer.h" -#include "gdb.h" -#include "ui-out.h" -#include "cli/cli-script.h" - -#include "gdb-events.h" - -/* Prototypes for local functions. */ - -static void until_break_command_continuation (struct continuation_arg *arg); - -static void catch_command_1 (char *, int, int); - -static void enable_delete_command (char *, int); - -static void enable_delete_breakpoint (struct breakpoint *); - -static void enable_once_command (char *, int); - -static void enable_once_breakpoint (struct breakpoint *); - -static void disable_command (char *, int); - -static void enable_command (char *, int); - -static void map_breakpoint_numbers (char *, void (*)(struct breakpoint *)); - -static void ignore_command (char *, int); - -static int breakpoint_re_set_one (PTR); - -static void clear_command (char *, int); - -static void catch_command (char *, int); - -static void handle_gnu_4_16_catch_command (char *, int, int); - -static struct symtabs_and_lines get_catch_sals (int); - -static void watch_command (char *, int); - -static int can_use_hardware_watchpoint (struct value *); - -extern void break_at_finish_command (char *, int); -extern void break_at_finish_at_depth_command (char *, int); - -extern void tbreak_at_finish_command (char *, int); - -static void break_command_1 (char *, int, int); - -static void mention (struct breakpoint *); - -struct breakpoint *set_raw_breakpoint (struct symtab_and_line, enum bptype); - -static void check_duplicates (struct breakpoint *); - -static void describe_other_breakpoints (CORE_ADDR, asection *); - -static void breakpoints_info (char *, int); - -static void breakpoint_1 (int, int); - -static bpstat bpstat_alloc (struct breakpoint *, bpstat); - -static int breakpoint_cond_eval (PTR); - -static void cleanup_executing_breakpoints (PTR); - -static void commands_command (char *, int); - -static void condition_command (char *, int); - -static int get_number_trailer (char **, int); - -void set_breakpoint_count (int); - -typedef enum - { - mark_inserted, - mark_uninserted - } -insertion_state_t; - -static int remove_breakpoint (struct breakpoint *, insertion_state_t); - -static enum print_stop_action print_it_typical (bpstat); - -static enum print_stop_action print_bp_stop_message (bpstat bs); - -typedef struct - { - enum exception_event_kind kind; - int enable_p; - } -args_for_catchpoint_enable; - -static int watchpoint_check (PTR); - -static int cover_target_enable_exception_callback (PTR); - -static void maintenance_info_breakpoints (char *, int); - -static void create_longjmp_breakpoint (char *); - -static void create_overlay_event_breakpoint (char *); - -static int hw_breakpoint_used_count (void); - -static int hw_watchpoint_used_count (enum bptype, int *); - -static void hbreak_command (char *, int); - -static void thbreak_command (char *, int); - -static void watch_command_1 (char *, int, int); - -static void rwatch_command (char *, int); - -static void awatch_command (char *, int); - -static void do_enable_breakpoint (struct breakpoint *, enum bpdisp); - -static void solib_load_unload_1 (char *hookname, - int tempflag, - char *dll_pathname, - char *cond_string, enum bptype bp_kind); - -static void create_fork_vfork_event_catchpoint (int tempflag, - char *cond_string, - enum bptype bp_kind); - -static void break_at_finish_at_depth_command_1 (char *arg, - int flag, int from_tty); - -static void break_at_finish_command_1 (char *arg, int flag, int from_tty); - -static void stop_command (char *arg, int from_tty); - -static void stopin_command (char *arg, int from_tty); - -static void stopat_command (char *arg, int from_tty); - -static char *ep_find_event_name_end (char *arg); - -static char *ep_parse_optional_if_clause (char **arg); - -static char *ep_parse_optional_filename (char **arg); - -#if defined(CHILD_INSERT_EXEC_CATCHPOINT) -static void catch_exec_command_1 (char *arg, int tempflag, int from_tty); -#endif - -static void create_exception_catchpoint (int tempflag, char *cond_string, - enum exception_event_kind ex_event, - struct symtab_and_line *sal); - -static void catch_exception_command_1 (enum exception_event_kind ex_event, - char *arg, int tempflag, int from_tty); - -static void tcatch_command (char *arg, int from_tty); - -static void ep_skip_leading_whitespace (char **s); - -/* Prototypes for exported functions. */ - -/* If FALSE, gdb will not use hardware support for watchpoints, even - if such is available. */ -static int can_use_hw_watchpoints; - -void _initialize_breakpoint (void); - -extern int addressprint; /* Print machine addresses? */ - -/* Are we executing breakpoint commands? */ -static int executing_breakpoint_commands; - -/* Are overlay event breakpoints enabled? */ -static int overlay_events_enabled; - -/* Walk the following statement or block through all breakpoints. - ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current - breakpoint. */ - -#define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next) - -#define ALL_BREAKPOINTS_SAFE(B,TMP) \ - for (B = breakpoint_chain; \ - B ? (TMP=B->next, 1): 0; \ - B = TMP) - -/* True if SHIFT_INST_REGS defined, false otherwise. */ - -int must_shift_inst_regs = -#if defined(SHIFT_INST_REGS) -1 -#else -0 -#endif - ; - -/* True if breakpoint hit counts should be displayed in breakpoint info. */ - -int show_breakpoint_hit_counts = 1; - -/* Chain of all breakpoints defined. */ - -struct breakpoint *breakpoint_chain; - -/* Number of last breakpoint made. */ - -int breakpoint_count; - -/* Pointer to current exception event record */ -static struct exception_event_record *current_exception_event; - -/* Indicator of whether exception catchpoints should be nuked - between runs of a program */ -int exception_catchpoints_are_fragile = 0; - -/* Indicator of when exception catchpoints set-up should be - reinitialized -- e.g. when program is re-run */ -int exception_support_initialized = 0; - -/* This function returns a pointer to the string representation of the - pathname of the dynamically-linked library that has just been - loaded. - - This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE, - or undefined results are guaranteed. - - This string's contents are only valid immediately after the - inferior has stopped in the dynamic linker hook, and becomes - invalid as soon as the inferior is continued. Clients should make - a copy of this string if they wish to continue the inferior and - then access the string. */ - -#ifndef SOLIB_LOADED_LIBRARY_PATHNAME -#define SOLIB_LOADED_LIBRARY_PATHNAME(pid) "" -#endif - -/* This function returns a pointer to the string representation of the - pathname of the dynamically-linked library that has just been - unloaded. - - This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is - TRUE, or undefined results are guaranteed. - - This string's contents are only valid immediately after the - inferior has stopped in the dynamic linker hook, and becomes - invalid as soon as the inferior is continued. Clients should make - a copy of this string if they wish to continue the inferior and - then access the string. */ - -#ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME -#define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) "" -#endif - -/* This function is called by the "catch load" command. It allows the - debugger to be notified by the dynamic linker when a specified - library file (or any library file, if filename is NULL) is loaded. */ - -#ifndef SOLIB_CREATE_CATCH_LOAD_HOOK -#define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \ - error ("catch of library loads not yet implemented on this platform") -#endif - -/* This function is called by the "catch unload" command. It allows - the debugger to be notified by the dynamic linker when a specified - library file (or any library file, if filename is NULL) is - unloaded. */ - -#ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK -#define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \ - error ("catch of library unloads not yet implemented on this platform") -#endif - -/* Set breakpoint count to NUM. */ - -void -set_breakpoint_count (int num) -{ - breakpoint_count = num; - set_internalvar (lookup_internalvar ("bpnum"), - value_from_longest (builtin_type_int, (LONGEST) num)); -} - -/* Used in run_command to zero the hit count when a new run starts. */ - -void -clear_breakpoint_hit_counts (void) -{ - struct breakpoint *b; - - ALL_BREAKPOINTS (b) - b->hit_count = 0; -} - -/* Default address, symtab and line to put a breakpoint at - for "break" command with no arg. - if default_breakpoint_valid is zero, the other three are - not valid, and "break" with no arg is an error. - - This set by print_stack_frame, which calls set_default_breakpoint. */ - -int default_breakpoint_valid; -CORE_ADDR default_breakpoint_address; -struct symtab *default_breakpoint_symtab; -int default_breakpoint_line; - -/* *PP is a string denoting a breakpoint. Get the number of the breakpoint. - Advance *PP after the string and any trailing whitespace. - - Currently the string can either be a number or "$" followed by the name - of a convenience variable. Making it an expression wouldn't work well - for map_breakpoint_numbers (e.g. "4 + 5 + 6"). - - TRAILER is a character which can be found after the number; most - commonly this is `-'. If you don't want a trailer, use \0. */ -static int -get_number_trailer (char **pp, int trailer) -{ - int retval = 0; /* default */ - char *p = *pp; - - if (p == NULL) - /* Empty line means refer to the last breakpoint. */ - return breakpoint_count; - else if (*p == '$') - { - /* Make a copy of the name, so we can null-terminate it - to pass to lookup_internalvar(). */ - char *varname; - char *start = ++p; - struct value *val; - - while (isalnum (*p) || *p == '_') - p++; - varname = (char *) alloca (p - start + 1); - strncpy (varname, start, p - start); - varname[p - start] = '\0'; - val = value_of_internalvar (lookup_internalvar (varname)); - if (TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_INT) - retval = (int) value_as_long (val); - else - { - printf_filtered ("Convenience variable must have integer value.\n"); - retval = 0; - } - } - else - { - if (*p == '-') - ++p; - while (*p >= '0' && *p <= '9') - ++p; - if (p == *pp) - /* There is no number here. (e.g. "cond a == b"). */ - { - /* Skip non-numeric token */ - while (*p && !isspace((int) *p)) - ++p; - /* Return zero, which caller must interpret as error. */ - retval = 0; - } - else - retval = atoi (*pp); - } - if (!(isspace (*p) || *p == '\0' || *p == trailer)) - { - /* Trailing junk: return 0 and let caller print error msg. */ - while (!(isspace (*p) || *p == '\0' || *p == trailer)) - ++p; - retval = 0; - } - while (isspace (*p)) - p++; - *pp = p; - return retval; -} - - -/* Like get_number_trailer, but don't allow a trailer. */ -int -get_number (char **pp) -{ - return get_number_trailer (pp, '\0'); -} - -/* Parse a number or a range. - * A number will be of the form handled by get_number. - * A range will be of the form <number1> - <number2>, and - * will represent all the integers between number1 and number2, - * inclusive. - * - * While processing a range, this fuction is called iteratively; - * At each call it will return the next value in the range. - * - * At the beginning of parsing a range, the char pointer PP will - * be advanced past <number1> and left pointing at the '-' token. - * Subsequent calls will not advance the pointer until the range - * is completed. The call that completes the range will advance - * pointer PP past <number2>. - */ - -int -get_number_or_range (char **pp) -{ - static int last_retval, end_value; - static char *end_ptr; - static int in_range = 0; - - if (**pp != '-') - { - /* Default case: pp is pointing either to a solo number, - or to the first number of a range. */ - last_retval = get_number_trailer (pp, '-'); - if (**pp == '-') - { - char **temp; - - /* This is the start of a range (<number1> - <number2>). - Skip the '-', parse and remember the second number, - and also remember the end of the final token. */ - - temp = &end_ptr; - end_ptr = *pp + 1; - while (isspace ((int) *end_ptr)) - end_ptr++; /* skip white space */ - end_value = get_number (temp); - if (end_value < last_retval) - { - error ("inverted range"); - } - else if (end_value == last_retval) - { - /* degenerate range (number1 == number2). Advance the - token pointer so that the range will be treated as a - single number. */ - *pp = end_ptr; - } - else - in_range = 1; - } - } - else if (! in_range) - error ("negative value"); - else - { - /* pp points to the '-' that betokens a range. All - number-parsing has already been done. Return the next - integer value (one greater than the saved previous value). - Do not advance the token pointer 'pp' until the end of range - is reached. */ - - if (++last_retval == end_value) - { - /* End of range reached; advance token pointer. */ - *pp = end_ptr; - in_range = 0; - } - } - return last_retval; -} - - - -/* condition N EXP -- set break condition of breakpoint N to EXP. */ - -static void -condition_command (char *arg, int from_tty) -{ - register struct breakpoint *b; - char *p; - register int bnum; - - if (arg == 0) - error_no_arg ("breakpoint number"); - - p = arg; - bnum = get_number (&p); - if (bnum == 0) - error ("Bad breakpoint argument: '%s'", arg); - - ALL_BREAKPOINTS (b) - if (b->number == bnum) - { - if (b->cond) - { - xfree (b->cond); - b->cond = 0; - } - if (b->cond_string != NULL) - xfree (b->cond_string); - - if (*p == 0) - { - b->cond = 0; - b->cond_string = NULL; - if (from_tty) - printf_filtered ("Breakpoint %d now unconditional.\n", bnum); - } - else - { - arg = p; - /* I don't know if it matters whether this is the string the user - typed in or the decompiled expression. */ - b->cond_string = savestring (arg, strlen (arg)); - b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0); - if (*arg) - error ("Junk at end of expression"); - } - breakpoints_changed (); - breakpoint_modify_event (b->number); - return; - } - - error ("No breakpoint number %d.", bnum); -} - -/* ARGSUSED */ -static void -commands_command (char *arg, int from_tty) -{ - register struct breakpoint *b; - char *p; - register int bnum; - struct command_line *l; - - /* If we allowed this, we would have problems with when to - free the storage, if we change the commands currently - being read from. */ - - if (executing_breakpoint_commands) - error ("Can't use the \"commands\" command among a breakpoint's commands."); - - p = arg; - bnum = get_number (&p); - - if (p && *p) - error ("Unexpected extra arguments following breakpoint number."); - - ALL_BREAKPOINTS (b) - if (b->number == bnum) - { - char tmpbuf[128]; - sprintf (tmpbuf, - "Type commands for when breakpoint %d is hit, one per line.", - bnum); - l = read_command_lines (tmpbuf, from_tty); - free_command_lines (&b->commands); - b->commands = l; - breakpoints_changed (); - breakpoint_modify_event (b->number); - return; - } - error ("No breakpoint number %d.", bnum); -} - -/* Like target_read_memory() but if breakpoints are inserted, return - the shadow contents instead of the breakpoints themselves. - - Read "memory data" from whatever target or inferior we have. - Returns zero if successful, errno value if not. EIO is used - for address out of bounds. If breakpoints are inserted, returns - shadow contents, not the breakpoints themselves. From breakpoint.c. */ - -int -read_memory_nobpt (CORE_ADDR memaddr, char *myaddr, unsigned len) -{ - int status; - struct breakpoint *b; - CORE_ADDR bp_addr = 0; - int bp_size = 0; - - if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL) - /* No breakpoints on this machine. */ - return target_read_memory (memaddr, myaddr, len); - - ALL_BREAKPOINTS (b) - { - if (b->type == bp_none) - warning ("reading through apparently deleted breakpoint #%d?", - b->number); - - /* memory breakpoint? */ - if (b->type == bp_watchpoint - || b->type == bp_hardware_watchpoint - || b->type == bp_read_watchpoint - || b->type == bp_access_watchpoint) - continue; - /* bp in memory? */ - if (!b->inserted) - continue; - /* Addresses and length of the part of the breakpoint that - we need to copy. */ - /* XXXX The m68k, sh and h8300 have different local and remote - breakpoint values. BREAKPOINT_FROM_PC still manages to - correctly determine the breakpoints memory address and size - for these targets. */ - bp_addr = b->address; - bp_size = 0; - if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL) - continue; - if (bp_size == 0) - /* bp isn't valid */ - continue; - if (bp_addr + bp_size <= memaddr) - /* The breakpoint is entirely before the chunk of memory we - are reading. */ - continue; - if (bp_addr >= memaddr + len) - /* The breakpoint is entirely after the chunk of memory we are - reading. */ - continue; - /* Copy the breakpoint from the shadow contents, and recurse for - the things before and after. */ - { - /* Offset within shadow_contents. */ - int bptoffset = 0; - - if (bp_addr < memaddr) - { - /* Only copy the second part of the breakpoint. */ - bp_size -= memaddr - bp_addr; - bptoffset = memaddr - bp_addr; - bp_addr = memaddr; - } - - if (bp_addr + bp_size > memaddr + len) - { - /* Only copy the first part of the breakpoint. */ - bp_size -= (bp_addr + bp_size) - (memaddr + len); - } - - memcpy (myaddr + bp_addr - memaddr, - b->shadow_contents + bptoffset, bp_size); - - if (bp_addr > memaddr) - { - /* Copy the section of memory before the breakpoint. */ - status = read_memory_nobpt (memaddr, myaddr, bp_addr - memaddr); - if (status != 0) - return status; - } - - if (bp_addr + bp_size < memaddr + len) - { - /* Copy the section of memory after the breakpoint. */ - status = read_memory_nobpt (bp_addr + bp_size, - myaddr + bp_addr + bp_size - memaddr, - memaddr + len - (bp_addr + bp_size)); - if (status != 0) - return status; - } - return 0; - } - } - /* Nothing overlaps. Just call read_memory_noerr. */ - return target_read_memory (memaddr, myaddr, len); -} - - -/* insert_breakpoints is used when starting or continuing the program. - remove_breakpoints is used when the program stops. - Both return zero if successful, - or an `errno' value if could not write the inferior. */ - -int -insert_breakpoints (void) -{ - register struct breakpoint *b, *temp; - int return_val = 0; /* return success code. */ - int val = 0; - int disabled_breaks = 0; - int hw_breakpoint_error = 0; - int process_warning = 0; - - static char message1[] = "Error inserting catchpoint %d:\n"; - static char message[sizeof (message1) + 30]; - -#ifdef ONE_PROCESS_WRITETEXT - process_warning = 1; -#endif - - struct ui_file *tmp_error_stream = mem_fileopen (); - make_cleanup_ui_file_delete (tmp_error_stream); - - /* Explicitly mark the warning -- this will only be printed if - there was an error. */ - fprintf_unfiltered (tmp_error_stream, "Warning:\n"); - - ALL_BREAKPOINTS_SAFE (b, temp) - { - if (b->enable_state == bp_permanent) - /* Permanent breakpoints cannot be inserted or removed. */ - continue; - if ((b->type == bp_watchpoint - || b->type == bp_hardware_watchpoint - || b->type == bp_read_watchpoint - || b->type == bp_access_watchpoint) && (!b->val)) - { - struct value *val; - val = evaluate_expression (b->exp); - release_value (val); - if (VALUE_LAZY (val)) - value_fetch_lazy (val); - b->val = val; - } - if (b->type != bp_watchpoint - && b->type != bp_hardware_watchpoint - && b->type != bp_read_watchpoint - && b->type != bp_access_watchpoint - && b->type != bp_catch_fork - && b->type != bp_catch_vfork - && b->type != bp_catch_exec - && b->type != bp_catch_throw - && b->type != bp_catch_catch - && b->enable_state != bp_disabled - && b->enable_state != bp_shlib_disabled - && b->enable_state != bp_call_disabled - && !b->inserted - && !b->duplicate) - { - /* "Normal" instruction breakpoint: either the standard - trap-instruction bp (bp_breakpoint), or a - bp_hardware_breakpoint. */ - - /* First check to see if we have to handle an overlay. */ - if (overlay_debugging == ovly_off - || b->section == NULL - || !(section_is_overlay (b->section))) - { - /* No overlay handling: just set the breakpoint. */ - - if (b->type == bp_hardware_breakpoint) - val = target_insert_hw_breakpoint (b->address, - b->shadow_contents); - else - val = target_insert_breakpoint (b->address, b->shadow_contents); - } - else - { - /* This breakpoint is in an overlay section. - Shall we set a breakpoint at the LMA? */ - if (!overlay_events_enabled) - { - /* Yes -- overlay event support is not active, - so we must try to set a breakpoint at the LMA. - This will not work for a hardware breakpoint. */ - if (b->type == bp_hardware_breakpoint) - warning ("hardware breakpoint %d not supported in overlay!\n", - b->number); - else - { - CORE_ADDR addr = overlay_unmapped_address (b->address, - b->section); - /* Set a software (trap) breakpoint at the LMA. */ - val = target_insert_breakpoint (addr, b->shadow_contents); - if (val != 0) - fprintf_unfiltered (tmp_error_stream, - "Overlay breakpoint %d failed: in ROM?", - b->number); - } - } - /* Shall we set a breakpoint at the VMA? */ - if (section_is_mapped (b->section)) - { - /* Yes. This overlay section is mapped into memory. */ - if (b->type == bp_hardware_breakpoint) - val = target_insert_hw_breakpoint (b->address, - b->shadow_contents); - else - val = target_insert_breakpoint (b->address, - b->shadow_contents); - } - else - { - /* No. This breakpoint will not be inserted. - No error, but do not mark the bp as 'inserted'. */ - continue; - } - } - - if (val) - { - /* Can't set the breakpoint. */ -#if defined (DISABLE_UNSETTABLE_BREAK) - if (DISABLE_UNSETTABLE_BREAK (b->address)) - { - /* See also: disable_breakpoints_in_shlibs. */ - val = 0; - b->enable_state = bp_shlib_disabled; - if (!disabled_breaks) - { - fprintf_unfiltered (tmp_error_stream, - "Cannot insert breakpoint %d.\n", b->number); - fprintf_unfiltered (tmp_error_stream, - "Temporarily disabling shared library breakpoints:\n"); - } - disabled_breaks = 1; - fprintf_unfiltered (tmp_error_stream, "breakpoint #%d\n", b->number); - } - else -#endif - { - process_warning = 1; - if (b->type == bp_hardware_breakpoint) - { - hw_breakpoint_error = 1; - fprintf_unfiltered (tmp_error_stream, - "Cannot insert hardware breakpoint %d.\n", - b->number); - } - else - { - fprintf_unfiltered (tmp_error_stream, "Cannot insert breakpoint %d.\n", b->number); - fprintf_filtered (tmp_error_stream, "Error accessing memory address "); - print_address_numeric (b->address, 1, tmp_error_stream); - fprintf_filtered (tmp_error_stream, ": %s.\n", - safe_strerror (val)); - } - - } - } - else - b->inserted = 1; - - if (val) - return_val = val; /* remember failure */ - } - else if (ep_is_exception_catchpoint (b) - && b->enable_state != bp_disabled - && b->enable_state != bp_shlib_disabled - && b->enable_state != bp_call_disabled - && !b->inserted - && !b->duplicate) - - { - /* If we get here, we must have a callback mechanism for exception - events -- with g++ style embedded label support, we insert - ordinary breakpoints and not catchpoints. */ - /* Format possible error message */ - sprintf (message, message1, b->number); - - val = target_insert_breakpoint (b->address, b->shadow_contents); - if (val) - { - /* Couldn't set breakpoint for some reason */ - fprintf_unfiltered (tmp_error_stream, - "Cannot insert catchpoint %d; disabling it.\n", - b->number); - fprintf_filtered (tmp_error_stream, "Error accessing memory address "); - print_address_numeric (b->address, 1, tmp_error_stream); - fprintf_filtered (tmp_error_stream, ": %s.\n", - safe_strerror (val)); - b->enable_state = bp_disabled; - } - else - { - /* Bp set, now make sure callbacks are enabled */ - int val; - args_for_catchpoint_enable args; - args.kind = b->type == bp_catch_catch ? - EX_EVENT_CATCH : EX_EVENT_THROW; - args.enable_p = 1; - val = catch_errors (cover_target_enable_exception_callback, - &args, - message, RETURN_MASK_ALL); - if (val != 0 && val != -1) - { - b->inserted = 1; - } - /* Check if something went wrong; val == 0 can be ignored */ - if (val == -1) - { - /* something went wrong */ - fprintf_unfiltered (tmp_error_stream, - "Cannot insert catchpoint %d; disabling it.\n", - b->number); - b->enable_state = bp_disabled; - } - } - - if (val) - return_val = val; /* remember failure */ - } - - else if ((b->type == bp_hardware_watchpoint || - b->type == bp_read_watchpoint || - b->type == bp_access_watchpoint) - && b->enable_state == bp_enabled - && b->disposition != disp_del_at_next_stop - && !b->inserted - && !b->duplicate) - { - struct frame_info *saved_frame; - int saved_level, within_current_scope; - struct value *mark = value_mark (); - struct value *v; - - /* Save the current frame and level so we can restore it after - evaluating the watchpoint expression on its own frame. */ - saved_frame = selected_frame; - saved_level = frame_relative_level (selected_frame); - - /* Determine if the watchpoint is within scope. */ - if (b->exp_valid_block == NULL) - within_current_scope = 1; - else - { - struct frame_info *fi; - fi = frame_find_by_id (b->watchpoint_frame); - within_current_scope = (fi != NULL); - if (within_current_scope) - select_frame (fi); - } - - if (within_current_scope) - { - /* Evaluate the expression and cut the chain of values - produced off from the value chain. - - Make sure the value returned isn't lazy; we use - laziness to determine what memory GDB actually needed - in order to compute the value of the expression. */ - v = evaluate_expression (b->exp); - VALUE_CONTENTS(v); - value_release_to_mark (mark); - - b->val_chain = v; - b->inserted = 1; - - /* Look at each value on the value chain. */ - for (; v; v = v->next) - { - /* If it's a memory location, and GDB actually needed - its contents to evaluate the expression, then we - must watch it. */ - if (VALUE_LVAL (v) == lval_memory - && ! VALUE_LAZY (v)) - { - struct type *vtype = check_typedef (VALUE_TYPE (v)); - - /* We only watch structs and arrays if user asked - for it explicitly, never if they just happen to - appear in the middle of some value chain. */ - if (v == b->val_chain - || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT - && TYPE_CODE (vtype) != TYPE_CODE_ARRAY)) - { - CORE_ADDR addr; - int len, type; - - addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); - len = TYPE_LENGTH (VALUE_TYPE (v)); - type = hw_write; - if (b->type == bp_read_watchpoint) - type = hw_read; - else if (b->type == bp_access_watchpoint) - type = hw_access; - - val = target_insert_watchpoint (addr, len, type); - if (val == -1) - { - /* Don't exit the loop, try to insert - every value on the value chain. That's - because we will be removing all the - watches below, and removing a - watchpoint we didn't insert could have - adverse effects. */ - b->inserted = 0; - } - val = 0; - } - } - } - /* Failure to insert a watchpoint on any memory value in the - value chain brings us here. */ - if (!b->inserted) - { - process_warning = 1; - remove_breakpoint (b, mark_uninserted); - hw_breakpoint_error = 1; - fprintf_unfiltered (tmp_error_stream, - "Cannot insert hardware watchpoint %d.\n", b->number); - val = -1; - } - } - else - { - printf_filtered ("Hardware watchpoint %d deleted ", b->number); - printf_filtered ("because the program has left the block \n"); - printf_filtered ("in which its expression is valid.\n"); - if (b->related_breakpoint) - b->related_breakpoint->disposition = disp_del_at_next_stop; - b->disposition = disp_del_at_next_stop; - } - - /* Restore the frame and level. */ - if ((saved_frame != selected_frame) || - (saved_level != frame_relative_level (selected_frame))) - select_frame (saved_frame); - - if (val) - return_val = val; /* remember failure */ - } - else if ((b->type == bp_catch_fork - || b->type == bp_catch_vfork - || b->type == bp_catch_exec) - && b->enable_state == bp_enabled - && !b->inserted - && !b->duplicate) - { - val = -1; - switch (b->type) - { - case bp_catch_fork: - val = target_insert_fork_catchpoint (PIDGET (inferior_ptid)); - break; - case bp_catch_vfork: - val = target_insert_vfork_catchpoint (PIDGET (inferior_ptid)); - break; - case bp_catch_exec: - val = target_insert_exec_catchpoint (PIDGET (inferior_ptid)); - break; - default: - warning ("Internal error, %s line %d.", __FILE__, __LINE__); - break; - } - if (val < 0) - { - fprintf_unfiltered (tmp_error_stream, "Cannot insert catchpoint %d.", b->number); - } - else - b->inserted = 1; - - if (val) - return_val = val; /* remember failure */ - } - } - - if (return_val) - { - /* If a hardware breakpoint or watchpoint was inserted, add a - message about possibly exhausted resources. */ - if (hw_breakpoint_error) - { - fprintf_unfiltered (tmp_error_stream, "Could not insert hardware breakpoints:\n" - "You may have requested too many hardware breakpoints/watchpoints.\n"); - } - - if (process_warning) - fprintf_unfiltered (tmp_error_stream,"The same program may be running in another process."); - - target_terminal_ours_for_output (); - error_stream (tmp_error_stream); - } - return return_val; -} - -int -remove_breakpoints (void) -{ - register struct breakpoint *b; - int val; - - ALL_BREAKPOINTS (b) - { - if (b->inserted) - { - val = remove_breakpoint (b, mark_uninserted); - if (val != 0) - return val; - } - } - return 0; -} - -int -remove_hw_watchpoints (void) -{ - register struct breakpoint *b; - int val; - - ALL_BREAKPOINTS (b) - { - if (b->inserted - && (b->type == bp_hardware_watchpoint - || b->type == bp_read_watchpoint - || b->type == bp_access_watchpoint)) - { - val = remove_breakpoint (b, mark_uninserted); - if (val != 0) - return val; - } - } - return 0; -} - -int -reattach_breakpoints (int pid) -{ - register struct breakpoint *b; - int val; - struct cleanup *old_chain = save_inferior_ptid (); - - /* Set inferior_ptid; remove_breakpoint uses this global. */ - inferior_ptid = pid_to_ptid (pid); - ALL_BREAKPOINTS (b) - { - if (b->inserted) - { - remove_breakpoint (b, mark_inserted); - if (b->type == bp_hardware_breakpoint) - val = target_insert_hw_breakpoint (b->address, b->shadow_contents); - else - val = target_insert_breakpoint (b->address, b->shadow_contents); - if (val != 0) - { - do_cleanups (old_chain); - return val; - } - } - } - do_cleanups (old_chain); - return 0; -} - -void -update_breakpoints_after_exec (void) -{ - struct breakpoint *b; - struct breakpoint *temp; - - /* Doing this first prevents the badness of having delete_breakpoint() - write a breakpoint's current "shadow contents" to lift the bp. That - shadow is NOT valid after an exec()! */ - mark_breakpoints_out (); - - ALL_BREAKPOINTS_SAFE (b, temp) - { - /* Solib breakpoints must be explicitly reset after an exec(). */ - if (b->type == bp_shlib_event) - { - delete_breakpoint (b); - continue; - } - - /* Thread event breakpoints must be set anew after an exec(), - as must overlay event breakpoints. */ - if (b->type == bp_thread_event || b->type == bp_overlay_event) - { - delete_breakpoint (b); - continue; - } - - /* Step-resume breakpoints are meaningless after an exec(). */ - if (b->type == bp_step_resume) - { - delete_breakpoint (b); - continue; - } - - /* Ditto the sigtramp handler breakpoints. */ - if (b->type == bp_through_sigtramp) - { - delete_breakpoint (b); - continue; - } - - /* Ditto the exception-handling catchpoints. */ - if ((b->type == bp_catch_catch) || (b->type == bp_catch_throw)) - { - delete_breakpoint (b); - continue; - } - - /* Don't delete an exec catchpoint, because else the inferior - won't stop when it ought! - - Similarly, we probably ought to keep vfork catchpoints, 'cause - on this target, we may not be able to stop when the vfork is - seen, but only when the subsequent exec is seen. (And because - deleting fork catchpoints here but not vfork catchpoints will - seem mysterious to users, keep those too.) - - ??rehrauer: Let's hope that merely clearing out this catchpoint's - target address field, if any, is sufficient to have it be reset - automagically. Certainly on HP-UX that's true. - - Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly - valid code address on some platforms (like the mn10200 and - mn10300 simulators). We shouldn't assign any special - interpretation to a breakpoint with a zero address. And in - fact, GDB doesn't --- I can't see what that comment above is - talking about. As far as I can tell, setting the address of a - bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero - is meaningless, since those are implemented with HP-UX kernel - hackery, not by storing breakpoint instructions somewhere. */ - if ((b->type == bp_catch_exec) || - (b->type == bp_catch_vfork) || - (b->type == bp_catch_fork)) - { - b->address = (CORE_ADDR) NULL; - continue; - } - - /* bp_finish is a special case. The only way we ought to be able - to see one of these when an exec() has happened, is if the user - caught a vfork, and then said "finish". Ordinarily a finish just - carries them to the call-site of the current callee, by setting - a temporary bp there and resuming. But in this case, the finish - will carry them entirely through the vfork & exec. - - We don't want to allow a bp_finish to remain inserted now. But - we can't safely delete it, 'cause finish_command has a handle to - the bp on a bpstat, and will later want to delete it. There's a - chance (and I've seen it happen) that if we delete the bp_finish - here, that its storage will get reused by the time finish_command - gets 'round to deleting the "use to be a bp_finish" breakpoint. - We really must allow finish_command to delete a bp_finish. - - In the absense of a general solution for the "how do we know - it's safe to delete something others may have handles to?" - problem, what we'll do here is just uninsert the bp_finish, and - let finish_command delete it. - - (We know the bp_finish is "doomed" in the sense that it's - momentary, and will be deleted as soon as finish_command sees - the inferior stopped. So it doesn't matter that the bp's - address is probably bogus in the new a.out, unlike e.g., the - solib breakpoints.) */ - - if (b->type == bp_finish) - { - continue; - } - - /* Without a symbolic address, we have little hope of the - pre-exec() address meaning the same thing in the post-exec() - a.out. */ - if (b->addr_string == NULL) - { - delete_breakpoint (b); - continue; - } - - /* If this breakpoint has survived the above battery of checks, then - it must have a symbolic address. Be sure that it gets reevaluated - to a target address, rather than reusing the old evaluation. - - Jim Blandy <jimb@redhat.com>: As explained above in the comment - for bp_catch_exec and friends, I'm pretty sure this is entirely - unnecessary. A call to breakpoint_re_set_one always recomputes - the breakpoint's address from scratch, or deletes it if it can't. - So I think this assignment could be deleted without effect. */ - b->address = (CORE_ADDR) NULL; - } - /* FIXME what about longjmp breakpoints? Re-create them here? */ - create_overlay_event_breakpoint ("_ovly_debug_event"); -} - -int -detach_breakpoints (int pid) -{ - register struct breakpoint *b; - int val; - struct cleanup *old_chain = save_inferior_ptid (); - - if (pid == PIDGET (inferior_ptid)) - error ("Cannot detach breakpoints of inferior_ptid"); - - /* Set inferior_ptid; remove_breakpoint uses this global. */ - inferior_ptid = pid_to_ptid (pid); - ALL_BREAKPOINTS (b) - { - if (b->inserted) - { - val = remove_breakpoint (b, mark_inserted); - if (val != 0) - { - do_cleanups (old_chain); - return val; - } - } - } - do_cleanups (old_chain); - return 0; -} - -static int -remove_breakpoint (struct breakpoint *b, insertion_state_t is) -{ - int val; - - if (b->enable_state == bp_permanent) - /* Permanent breakpoints cannot be inserted or removed. */ - return 0; - - if (b->type == bp_none) - warning ("attempted to remove apparently deleted breakpoint #%d?", - b->number); - - if (b->type != bp_watchpoint - && b->type != bp_hardware_watchpoint - && b->type != bp_read_watchpoint - && b->type != bp_access_watchpoint - && b->type != bp_catch_fork - && b->type != bp_catch_vfork - && b->type != bp_catch_exec - && b->type != bp_catch_catch - && b->type != bp_catch_throw) - { - /* "Normal" instruction breakpoint: either the standard - trap-instruction bp (bp_breakpoint), or a - bp_hardware_breakpoint. */ - - /* First check to see if we have to handle an overlay. */ - if (overlay_debugging == ovly_off - || b->section == NULL - || !(section_is_overlay (b->section))) - { - /* No overlay handling: just remove the breakpoint. */ - - if (b->type == bp_hardware_breakpoint) - val = target_remove_hw_breakpoint (b->address, - b->shadow_contents); - else - val = target_remove_breakpoint (b->address, b->shadow_contents); - } - else - { - /* This breakpoint is in an overlay section. - Did we set a breakpoint at the LMA? */ - if (!overlay_events_enabled) - { - /* Yes -- overlay event support is not active, so we - should have set a breakpoint at the LMA. Remove it. - */ - CORE_ADDR addr = overlay_unmapped_address (b->address, - b->section); - /* Ignore any failures: if the LMA is in ROM, we will - have already warned when we failed to insert it. */ - if (b->type != bp_hardware_breakpoint) - target_remove_hw_breakpoint (addr, b->shadow_contents); - else - target_remove_breakpoint (addr, b->shadow_contents); - } - /* Did we set a breakpoint at the VMA? - If so, we will have marked the breakpoint 'inserted'. */ - if (b->inserted) - { - /* Yes -- remove it. Previously we did not bother to - remove the breakpoint if the section had been - unmapped, but let's not rely on that being safe. We - don't know what the overlay manager might do. */ - if (b->type == bp_hardware_breakpoint) - val = target_remove_hw_breakpoint (b->address, - b->shadow_contents); - else - val = target_remove_breakpoint (b->address, - b->shadow_contents); - } - else - { - /* No -- not inserted, so no need to remove. No error. */ - val = 0; - } - } - if (val) - return val; - b->inserted = (is == mark_inserted); - } - else if ((b->type == bp_hardware_watchpoint || - b->type == bp_read_watchpoint || - b->type == bp_access_watchpoint) - && b->enable_state == bp_enabled - && !b->duplicate) - { - struct value *v; - struct value *n; - - b->inserted = (is == mark_inserted); - /* Walk down the saved value chain. */ - for (v = b->val_chain; v; v = v->next) - { - /* For each memory reference remove the watchpoint - at that address. */ - if (VALUE_LVAL (v) == lval_memory - && ! VALUE_LAZY (v)) - { - struct type *vtype = check_typedef (VALUE_TYPE (v)); - - if (v == b->val_chain - || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT - && TYPE_CODE (vtype) != TYPE_CODE_ARRAY)) - { - CORE_ADDR addr; - int len, type; - - addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); - len = TYPE_LENGTH (VALUE_TYPE (v)); - type = hw_write; - if (b->type == bp_read_watchpoint) - type = hw_read; - else if (b->type == bp_access_watchpoint) - type = hw_access; - - val = target_remove_watchpoint (addr, len, type); - if (val == -1) - b->inserted = 1; - val = 0; - } - } - } - /* Failure to remove any of the hardware watchpoints comes here. */ - if ((is == mark_uninserted) && (b->inserted)) - warning ("Could not remove hardware watchpoint %d.", - b->number); - - /* Free the saved value chain. We will construct a new one - the next time the watchpoint is inserted. */ - for (v = b->val_chain; v; v = n) - { - n = v->next; - value_free (v); - } - b->val_chain = NULL; - } - else if ((b->type == bp_catch_fork || - b->type == bp_catch_vfork || - b->type == bp_catch_exec) - && b->enable_state == bp_enabled - && !b->duplicate) - { - val = -1; - switch (b->type) - { - case bp_catch_fork: - val = target_remove_fork_catchpoint (PIDGET (inferior_ptid)); - break; - case bp_catch_vfork: - val = target_remove_vfork_catchpoint (PIDGET (inferior_ptid)); - break; - case bp_catch_exec: - val = target_remove_exec_catchpoint (PIDGET (inferior_ptid)); - break; - default: - warning ("Internal error, %s line %d.", __FILE__, __LINE__); - break; - } - if (val) - return val; - b->inserted = (is == mark_inserted); - } - else if ((b->type == bp_catch_catch || - b->type == bp_catch_throw) - && b->enable_state == bp_enabled - && !b->duplicate) - { - - val = target_remove_breakpoint (b->address, b->shadow_contents); - if (val) - return val; - b->inserted = (is == mark_inserted); - } - else if (ep_is_exception_catchpoint (b) - && b->inserted /* sometimes previous insert doesn't happen */ - && b->enable_state == bp_enabled - && !b->duplicate) - { - - val = target_remove_breakpoint (b->address, b->shadow_contents); - if (val) - return val; - - b->inserted = (is == mark_inserted); - } - - return 0; -} - -/* Clear the "inserted" flag in all breakpoints. */ - -void -mark_breakpoints_out (void) -{ - register struct breakpoint *b; - - ALL_BREAKPOINTS (b) - b->inserted = 0; -} - -/* Clear the "inserted" flag in all breakpoints and delete any - breakpoints which should go away between runs of the program. - - Plus other such housekeeping that has to be done for breakpoints - between runs. - - Note: this function gets called at the end of a run (by - generic_mourn_inferior) and when a run begins (by - init_wait_for_inferior). */ - - - -void -breakpoint_init_inferior (enum inf_context context) -{ - register struct breakpoint *b, *temp; - static int warning_needed = 0; - - ALL_BREAKPOINTS_SAFE (b, temp) - { - b->inserted = 0; - - switch (b->type) - { - case bp_call_dummy: - case bp_watchpoint_scope: - - /* If the call dummy breakpoint is at the entry point it will - cause problems when the inferior is rerun, so we better - get rid of it. - - Also get rid of scope breakpoints. */ - delete_breakpoint (b); - break; - - case bp_watchpoint: - case bp_hardware_watchpoint: - case bp_read_watchpoint: - case bp_access_watchpoint: - - /* Likewise for watchpoints on local expressions. */ - if (b->exp_valid_block != NULL) - delete_breakpoint (b); - if (context == inf_starting) - { - /* Reset val field to force reread of starting value - in insert_breakpoints. */ - if (b->val) - value_free (b->val); - b->val = NULL; - } - break; - default: - /* Likewise for exception catchpoints in dynamic-linked - executables where required */ - if (ep_is_exception_catchpoint (b) && - exception_catchpoints_are_fragile) - { - warning_needed = 1; - delete_breakpoint (b); - } - break; - } - } - - if (exception_catchpoints_are_fragile) - exception_support_initialized = 0; - - /* Don't issue the warning unless it's really needed... */ - if (warning_needed && (context != inf_exited)) - { - warning ("Exception catchpoints from last run were deleted."); - warning ("You must reinsert them explicitly."); - warning_needed = 0; - } -} - -/* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint - exists at PC. It returns ordinary_breakpoint_here if it's an - ordinary breakpoint, or permanent_breakpoint_here if it's a - permanent breakpoint. - - When continuing from a location with an ordinary breakpoint, we - actually single step once before calling insert_breakpoints. - - When continuing from a localion with a permanent breakpoint, we - need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by - the target, to advance the PC past the breakpoint. */ - -enum breakpoint_here -breakpoint_here_p (CORE_ADDR pc) -{ - register struct breakpoint *b; - int any_breakpoint_here = 0; - - ALL_BREAKPOINTS (b) - if ((b->enable_state == bp_enabled - || b->enable_state == bp_permanent) - && b->address == pc) /* bp is enabled and matches pc */ - { - if (overlay_debugging - && section_is_overlay (b->section) - && !section_is_mapped (b->section)) - continue; /* unmapped overlay -- can't be a match */ - else if (b->enable_state == bp_permanent) - return permanent_breakpoint_here; - else - any_breakpoint_here = 1; - } - - return any_breakpoint_here ? ordinary_breakpoint_here : 0; -} - - -/* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(), - but it only returns true if there is actually a breakpoint inserted - at PC. */ - -int -breakpoint_inserted_here_p (CORE_ADDR pc) -{ - register struct breakpoint *b; - - ALL_BREAKPOINTS (b) - if (b->inserted - && b->address == pc) /* bp is inserted and matches pc */ - { - if (overlay_debugging - && section_is_overlay (b->section) - && !section_is_mapped (b->section)) - continue; /* unmapped overlay -- can't be a match */ - else - return 1; - } - - return 0; -} - -/* Return nonzero if FRAME is a dummy frame. We can't use - PC_IN_CALL_DUMMY because figuring out the saved SP would take too - much time, at least using get_saved_register on the 68k. This - means that for this function to work right a port must use the - bp_call_dummy breakpoint. */ - -int -frame_in_dummy (struct frame_info *frame) -{ - struct breakpoint *b; - - if (!CALL_DUMMY_P) - return 0; - - if (USE_GENERIC_DUMMY_FRAMES) - return generic_pc_in_call_dummy (frame->pc, frame->frame, frame->frame); - - ALL_BREAKPOINTS (b) - { - if (b->type == bp_call_dummy - && b->frame == frame->frame - /* We need to check the PC as well as the frame on the sparc, - for signals.exp in the testsuite. */ - && (frame->pc - >= (b->address - - SIZEOF_CALL_DUMMY_WORDS / sizeof (LONGEST) * REGISTER_SIZE)) - && frame->pc <= b->address) - return 1; - } - return 0; -} - -/* breakpoint_thread_match (PC, PID) returns true if the breakpoint at - PC is valid for process/thread PID. */ - -int -breakpoint_thread_match (CORE_ADDR pc, ptid_t ptid) -{ - struct breakpoint *b; - int thread; - - thread = pid_to_thread_id (ptid); - - ALL_BREAKPOINTS (b) - if (b->enable_state != bp_disabled - && b->enable_state != bp_shlib_disabled - && b->enable_state != bp_call_disabled - && b->address == pc - && (b->thread == -1 || b->thread == thread)) - { - if (overlay_debugging - && section_is_overlay (b->section) - && !section_is_mapped (b->section)) - continue; /* unmapped overlay -- can't be a match */ - else - return 1; - } - - return 0; -} - - -/* bpstat stuff. External routines' interfaces are documented - in breakpoint.h. */ - -int -ep_is_catchpoint (struct breakpoint *ep) -{ - return - (ep->type == bp_catch_load) - || (ep->type == bp_catch_unload) - || (ep->type == bp_catch_fork) - || (ep->type == bp_catch_vfork) - || (ep->type == bp_catch_exec) - || (ep->type == bp_catch_catch) - || (ep->type == bp_catch_throw); - - /* ??rehrauer: Add more kinds here, as are implemented... */ -} - -int -ep_is_shlib_catchpoint (struct breakpoint *ep) -{ - return - (ep->type == bp_catch_load) - || (ep->type == bp_catch_unload); -} - -int -ep_is_exception_catchpoint (struct breakpoint *ep) -{ - return - (ep->type == bp_catch_catch) - || (ep->type == bp_catch_throw); -} - -/* Clear a bpstat so that it says we are not at any breakpoint. - Also free any storage that is part of a bpstat. */ - -void -bpstat_clear (bpstat *bsp) -{ - bpstat p; - bpstat q; - - if (bsp == 0) - return; - p = *bsp; - while (p != NULL) - { - q = p->next; - if (p->old_val != NULL) - value_free (p->old_val); - free_command_lines (&p->commands); - xfree (p); - p = q; - } - *bsp = NULL; -} - -/* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that - is part of the bpstat is copied as well. */ - -bpstat -bpstat_copy (bpstat bs) -{ - bpstat p = NULL; - bpstat tmp; - bpstat retval = NULL; - - if (bs == NULL) - return bs; - - for (; bs != NULL; bs = bs->next) - { - tmp = (bpstat) xmalloc (sizeof (*tmp)); - memcpy (tmp, bs, sizeof (*tmp)); - if (p == NULL) - /* This is the first thing in the chain. */ - retval = tmp; - else - p->next = tmp; - p = tmp; - } - p->next = NULL; - return retval; -} - -/* Find the bpstat associated with this breakpoint */ - -bpstat -bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint) -{ - if (bsp == NULL) - return NULL; - - for (; bsp != NULL; bsp = bsp->next) - { - if (bsp->breakpoint_at == breakpoint) - return bsp; - } - return NULL; -} - -/* Find a step_resume breakpoint associated with this bpstat. - (If there are multiple step_resume bp's on the list, this function - will arbitrarily pick one.) - - It is an error to use this function if BPSTAT doesn't contain a - step_resume breakpoint. - - See wait_for_inferior's use of this function. */ -struct breakpoint * -bpstat_find_step_resume_breakpoint (bpstat bsp) -{ - int current_thread; - - if (bsp == NULL) - error ("Internal error (bpstat_find_step_resume_breakpoint)"); - - current_thread = pid_to_thread_id (inferior_ptid); - - for (; bsp != NULL; bsp = bsp->next) - { - if ((bsp->breakpoint_at != NULL) && - (bsp->breakpoint_at->type == bp_step_resume) && - (bsp->breakpoint_at->thread == current_thread || - bsp->breakpoint_at->thread == -1)) - return bsp->breakpoint_at; - } - - error ("Internal error (no step_resume breakpoint found)"); -} - - -/* Return the breakpoint number of the first breakpoint we are stopped - at. *BSP upon return is a bpstat which points to the remaining - breakpoints stopped at (but which is not guaranteed to be good for - anything but further calls to bpstat_num). - Return 0 if passed a bpstat which does not indicate any breakpoints. */ - -int -bpstat_num (bpstat *bsp) -{ - struct breakpoint *b; - - if ((*bsp) == NULL) - return 0; /* No more breakpoint values */ - else - { - b = (*bsp)->breakpoint_at; - *bsp = (*bsp)->next; - if (b == NULL) - return -1; /* breakpoint that's been deleted since */ - else - return b->number; /* We have its number */ - } -} - -/* Modify BS so that the actions will not be performed. */ - -void -bpstat_clear_actions (bpstat bs) -{ - for (; bs != NULL; bs = bs->next) - { - free_command_lines (&bs->commands); - if (bs->old_val != NULL) - { - value_free (bs->old_val); - bs->old_val = NULL; - } - } -} - -/* Stub for cleaning up our state if we error-out of a breakpoint command */ -/* ARGSUSED */ -static void -cleanup_executing_breakpoints (PTR ignore) -{ - executing_breakpoint_commands = 0; -} - -/* Execute all the commands associated with all the breakpoints at this - location. Any of these commands could cause the process to proceed - beyond this point, etc. We look out for such changes by checking - the global "breakpoint_proceeded" after each command. */ - -void -bpstat_do_actions (bpstat *bsp) -{ - bpstat bs; - struct cleanup *old_chain; - struct command_line *cmd; - - /* Avoid endless recursion if a `source' command is contained - in bs->commands. */ - if (executing_breakpoint_commands) - return; - - executing_breakpoint_commands = 1; - old_chain = make_cleanup (cleanup_executing_breakpoints, 0); - -top: - /* Note that (as of this writing), our callers all appear to - be passing us the address of global stop_bpstat. And, if - our calls to execute_control_command cause the inferior to - proceed, that global (and hence, *bsp) will change. - - We must be careful to not touch *bsp unless the inferior - has not proceeded. */ - - /* This pointer will iterate over the list of bpstat's. */ - bs = *bsp; - - breakpoint_proceeded = 0; - for (; bs != NULL; bs = bs->next) - { - cmd = bs->commands; - while (cmd != NULL) - { - execute_control_command (cmd); - - if (breakpoint_proceeded) - break; - else - cmd = cmd->next; - } - if (breakpoint_proceeded) - /* The inferior is proceeded by the command; bomb out now. - The bpstat chain has been blown away by wait_for_inferior. - But since execution has stopped again, there is a new bpstat - to look at, so start over. */ - goto top; - else - free_command_lines (&bs->commands); - } - do_cleanups (old_chain); -} - -/* This is the normal print function for a bpstat. In the future, - much of this logic could (should?) be moved to bpstat_stop_status, - by having it set different print_it values. - - Current scheme: When we stop, bpstat_print() is called. It loops - through the bpstat list of things causing this stop, calling the - print_bp_stop_message function on each one. The behavior of the - print_bp_stop_message function depends on the print_it field of - bpstat. If such field so indicates, call this function here. - - Return values from this routine (ultimately used by bpstat_print() - and normal_stop() to decide what to do): - PRINT_NOTHING: Means we already printed all we needed to print, - don't print anything else. - PRINT_SRC_ONLY: Means we printed something, and we do *not* desire - that something to be followed by a location. - PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire - that something to be followed by a location. - PRINT_UNKNOWN: Means we printed nothing or we need to do some more - analysis. */ - -static enum print_stop_action -print_it_typical (bpstat bs) -{ - struct cleanup *old_chain; - struct ui_stream *stb; - stb = ui_out_stream_new (uiout); - old_chain = make_cleanup_ui_out_stream_delete (stb); - /* bs->breakpoint_at can be NULL if it was a momentary breakpoint - which has since been deleted. */ - if (bs->breakpoint_at == NULL) - return PRINT_UNKNOWN; - - switch (bs->breakpoint_at->type) - { - case bp_breakpoint: - case bp_hardware_breakpoint: - annotate_breakpoint (bs->breakpoint_at->number); - ui_out_text (uiout, "\nBreakpoint "); - if (ui_out_is_mi_like_p (uiout)) - ui_out_field_string (uiout, "reason", "breakpoint-hit"); - ui_out_field_int (uiout, "bkptno", bs->breakpoint_at->number); - ui_out_text (uiout, ", "); - return PRINT_SRC_AND_LOC; - break; - - case bp_shlib_event: - /* Did we stop because the user set the stop_on_solib_events - variable? (If so, we report this as a generic, "Stopped due - to shlib event" message.) */ - printf_filtered ("Stopped due to shared library event\n"); - return PRINT_NOTHING; - break; - - case bp_thread_event: - /* Not sure how we will get here. - GDB should not stop for these breakpoints. */ - printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n"); - return PRINT_NOTHING; - break; - - case bp_overlay_event: - /* By analogy with the thread event, GDB should not stop for these. */ - printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n"); - return PRINT_NOTHING; - break; - - case bp_catch_load: - annotate_catchpoint (bs->breakpoint_at->number); - printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); - printf_filtered ("loaded"); - printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname); - return PRINT_SRC_AND_LOC; - break; - - case bp_catch_unload: - annotate_catchpoint (bs->breakpoint_at->number); - printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); - printf_filtered ("unloaded"); - printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname); - return PRINT_SRC_AND_LOC; - break; - - case bp_catch_fork: - annotate_catchpoint (bs->breakpoint_at->number); - printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); - printf_filtered ("forked"); - printf_filtered (" process %d), ", - bs->breakpoint_at->forked_inferior_pid); - return PRINT_SRC_AND_LOC; - break; - - case bp_catch_vfork: - annotate_catchpoint (bs->breakpoint_at->number); - printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); - printf_filtered ("vforked"); - printf_filtered (" process %d), ", - bs->breakpoint_at->forked_inferior_pid); - return PRINT_SRC_AND_LOC; - break; - - case bp_catch_exec: - annotate_catchpoint (bs->breakpoint_at->number); - printf_filtered ("\nCatchpoint %d (exec'd %s), ", - bs->breakpoint_at->number, - bs->breakpoint_at->exec_pathname); - return PRINT_SRC_AND_LOC; - break; - - case bp_catch_catch: - if (current_exception_event && - (CURRENT_EXCEPTION_KIND == EX_EVENT_CATCH)) - { - annotate_catchpoint (bs->breakpoint_at->number); - printf_filtered ("\nCatchpoint %d (exception caught), ", - bs->breakpoint_at->number); - printf_filtered ("throw location "); - if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE) - printf_filtered ("%s:%d", - CURRENT_EXCEPTION_THROW_FILE, - CURRENT_EXCEPTION_THROW_LINE); - else - printf_filtered ("unknown"); - - printf_filtered (", catch location "); - if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE) - printf_filtered ("%s:%d", - CURRENT_EXCEPTION_CATCH_FILE, - CURRENT_EXCEPTION_CATCH_LINE); - else - printf_filtered ("unknown"); - - printf_filtered ("\n"); - /* don't bother to print location frame info */ - return PRINT_SRC_ONLY; - } - else - { - /* really throw, some other bpstat will handle it */ - return PRINT_UNKNOWN; - } - break; - - case bp_catch_throw: - if (current_exception_event && - (CURRENT_EXCEPTION_KIND == EX_EVENT_THROW)) - { - annotate_catchpoint (bs->breakpoint_at->number); - printf_filtered ("\nCatchpoint %d (exception thrown), ", - bs->breakpoint_at->number); - printf_filtered ("throw location "); - if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE) - printf_filtered ("%s:%d", - CURRENT_EXCEPTION_THROW_FILE, - CURRENT_EXCEPTION_THROW_LINE); - else - printf_filtered ("unknown"); - - printf_filtered (", catch location "); - if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE) - printf_filtered ("%s:%d", - CURRENT_EXCEPTION_CATCH_FILE, - CURRENT_EXCEPTION_CATCH_LINE); - else - printf_filtered ("unknown"); - - printf_filtered ("\n"); - /* don't bother to print location frame info */ - return PRINT_SRC_ONLY; - } - else - { - /* really catch, some other bpstat will handle it */ - return PRINT_UNKNOWN; - } - break; - - case bp_watchpoint: - case bp_hardware_watchpoint: - if (bs->old_val != NULL) - { - annotate_watchpoint (bs->breakpoint_at->number); - if (ui_out_is_mi_like_p (uiout)) - ui_out_field_string (uiout, "reason", "watchpoint-trigger"); - mention (bs->breakpoint_at); - ui_out_tuple_begin (uiout, "value"); - ui_out_text (uiout, "\nOld value = "); - value_print (bs->old_val, stb->stream, 0, Val_pretty_default); - ui_out_field_stream (uiout, "old", stb); - ui_out_text (uiout, "\nNew value = "); - value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default); - ui_out_field_stream (uiout, "new", stb); - ui_out_tuple_end (uiout); - ui_out_text (uiout, "\n"); - value_free (bs->old_val); - bs->old_val = NULL; - } - /* More than one watchpoint may have been triggered. */ - return PRINT_UNKNOWN; - break; - - case bp_read_watchpoint: - if (ui_out_is_mi_like_p (uiout)) - ui_out_field_string (uiout, "reason", "read-watchpoint-trigger"); - mention (bs->breakpoint_at); - ui_out_tuple_begin (uiout, "value"); - ui_out_text (uiout, "\nValue = "); - value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default); - ui_out_field_stream (uiout, "value", stb); - ui_out_tuple_end (uiout); - ui_out_text (uiout, "\n"); - return PRINT_UNKNOWN; - break; - - case bp_access_watchpoint: - if (bs->old_val != NULL) - { - annotate_watchpoint (bs->breakpoint_at->number); - if (ui_out_is_mi_like_p (uiout)) - ui_out_field_string (uiout, "reason", "access-watchpoint-trigger"); - mention (bs->breakpoint_at); - ui_out_tuple_begin (uiout, "value"); - ui_out_text (uiout, "\nOld value = "); - value_print (bs->old_val, stb->stream, 0, Val_pretty_default); - ui_out_field_stream (uiout, "old", stb); - value_free (bs->old_val); - bs->old_val = NULL; - ui_out_text (uiout, "\nNew value = "); - } - else - { - mention (bs->breakpoint_at); - if (ui_out_is_mi_like_p (uiout)) - ui_out_field_string (uiout, "reason", "access-watchpoint-trigger"); - ui_out_tuple_begin (uiout, "value"); - ui_out_text (uiout, "\nValue = "); - } - value_print (bs->breakpoint_at->val, stb->stream, 0,Val_pretty_default); - ui_out_field_stream (uiout, "new", stb); - ui_out_tuple_end (uiout); - ui_out_text (uiout, "\n"); - return PRINT_UNKNOWN; - break; - - /* Fall through, we don't deal with these types of breakpoints - here. */ - - case bp_finish: - if (ui_out_is_mi_like_p (uiout)) - ui_out_field_string (uiout, "reason", "function-finished"); - return PRINT_UNKNOWN; - break; - - case bp_until: - if (ui_out_is_mi_like_p (uiout)) - ui_out_field_string (uiout, "reason", "location-reached"); - return PRINT_UNKNOWN; - break; - - case bp_none: - case bp_longjmp: - case bp_longjmp_resume: - case bp_step_resume: - case bp_through_sigtramp: - case bp_watchpoint_scope: - case bp_call_dummy: - default: - return PRINT_UNKNOWN; - } -} - -/* Generic routine for printing messages indicating why we - stopped. The behavior of this function depends on the value - 'print_it' in the bpstat structure. Under some circumstances we - may decide not to print anything here and delegate the task to - normal_stop(). */ - -static enum print_stop_action -print_bp_stop_message (bpstat bs) -{ - switch (bs->print_it) - { - case print_it_noop: - /* Nothing should be printed for this bpstat entry. */ - return PRINT_UNKNOWN; - break; - - case print_it_done: - /* We still want to print the frame, but we already printed the - relevant messages. */ - return PRINT_SRC_AND_LOC; - break; - - case print_it_normal: - /* Normal case, we handle everything in print_it_typical. */ - return print_it_typical (bs); - break; - default: - internal_error (__FILE__, __LINE__, - "print_bp_stop_message: unrecognized enum value"); - break; - } -} - -/* Print a message indicating what happened. This is called from - normal_stop(). The input to this routine is the head of the bpstat - list - a list of the eventpoints that caused this stop. This - routine calls the generic print routine for printing a message - about reasons for stopping. This will print (for example) the - "Breakpoint n," part of the output. The return value of this - routine is one of: - - PRINT_UNKNOWN: Means we printed nothing - PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent - code to print the location. An example is - "Breakpoint 1, " which should be followed by - the location. - PRINT_SRC_ONLY: Means we printed something, but there is no need - to also print the location part of the message. - An example is the catch/throw messages, which - don't require a location appended to the end. - PRINT_NOTHING: We have done some printing and we don't need any - further info to be printed.*/ - -enum print_stop_action -bpstat_print (bpstat bs) -{ - int val; - - /* Maybe another breakpoint in the chain caused us to stop. - (Currently all watchpoints go on the bpstat whether hit or not. - That probably could (should) be changed, provided care is taken - with respect to bpstat_explains_signal). */ - for (; bs; bs = bs->next) - { - val = print_bp_stop_message (bs); - if (val == PRINT_SRC_ONLY - || val == PRINT_SRC_AND_LOC - || val == PRINT_NOTHING) - return val; - } - - /* We reached the end of the chain, or we got a null BS to start - with and nothing was printed. */ - return PRINT_UNKNOWN; -} - -/* Evaluate the expression EXP and return 1 if value is zero. - This is used inside a catch_errors to evaluate the breakpoint condition. - The argument is a "struct expression *" that has been cast to char * to - make it pass through catch_errors. */ - -static int -breakpoint_cond_eval (PTR exp) -{ - struct value *mark = value_mark (); - int i = !value_true (evaluate_expression ((struct expression *) exp)); - value_free_to_mark (mark); - return i; -} - -/* Allocate a new bpstat and chain it to the current one. */ - -static bpstat -bpstat_alloc (struct breakpoint *b, bpstat cbs /* Current "bs" value */ ) -{ - bpstat bs; - - bs = (bpstat) xmalloc (sizeof (*bs)); - cbs->next = bs; - bs->breakpoint_at = b; - /* If the condition is false, etc., don't do the commands. */ - bs->commands = NULL; - bs->old_val = NULL; - bs->print_it = print_it_normal; - return bs; -} - -/* Possible return values for watchpoint_check (this can't be an enum - because of check_errors). */ -/* The watchpoint has been deleted. */ -#define WP_DELETED 1 -/* The value has changed. */ -#define WP_VALUE_CHANGED 2 -/* The value has not changed. */ -#define WP_VALUE_NOT_CHANGED 3 - -#define BP_TEMPFLAG 1 -#define BP_HARDWAREFLAG 2 - -/* Check watchpoint condition. */ - -static int -watchpoint_check (PTR p) -{ - bpstat bs = (bpstat) p; - struct breakpoint *b; - struct frame_info *fr; - int within_current_scope; - - b = bs->breakpoint_at; - - if (b->exp_valid_block == NULL) - within_current_scope = 1; - else - { - /* There is no current frame at this moment. If we're going to have - any chance of handling watchpoints on local variables, we'll need - the frame chain (so we can determine if we're in scope). */ - reinit_frame_cache (); - fr = frame_find_by_id (b->watchpoint_frame); - within_current_scope = (fr != NULL); - /* in_function_epilogue_p() returns a non-zero value if we're still - in the function but the stack frame has already been invalidated. - Since we can't rely on the values of local variables after the - stack has been destroyed, we are treating the watchpoint in that - state as `not changed' without further checking. */ - if (within_current_scope && fr == get_current_frame () - && gdbarch_in_function_epilogue_p (current_gdbarch, read_pc ())) - return WP_VALUE_NOT_CHANGED; - if (within_current_scope) - /* If we end up stopping, the current frame will get selected - in normal_stop. So this call to select_frame won't affect - the user. */ - select_frame (fr); - } - - if (within_current_scope) - { - /* We use value_{,free_to_}mark because it could be a - *long* time before we return to the command level and - call free_all_values. We can't call free_all_values because - we might be in the middle of evaluating a function call. */ - - struct value *mark = value_mark (); - struct value *new_val = evaluate_expression (bs->breakpoint_at->exp); - if (!value_equal (b->val, new_val)) - { - release_value (new_val); - value_free_to_mark (mark); - bs->old_val = b->val; - b->val = new_val; - /* We will stop here */ - return WP_VALUE_CHANGED; - } - else - { - /* Nothing changed, don't do anything. */ - value_free_to_mark (mark); - /* We won't stop here */ - return WP_VALUE_NOT_CHANGED; - } - } - else - { - /* This seems like the only logical thing to do because - if we temporarily ignored the watchpoint, then when - we reenter the block in which it is valid it contains - garbage (in the case of a function, it may have two - garbage values, one before and one after the prologue). - So we can't even detect the first assignment to it and - watch after that (since the garbage may or may not equal - the first value assigned). */ - /* We print all the stop information in print_it_typical(), but - in this case, by the time we call print_it_typical() this bp - will be deleted already. So we have no choice but print the - information here. */ - if (ui_out_is_mi_like_p (uiout)) - ui_out_field_string (uiout, "reason", "watchpoint-scope"); - ui_out_text (uiout, "\nWatchpoint "); - ui_out_field_int (uiout, "wpnum", bs->breakpoint_at->number); - ui_out_text (uiout, " deleted because the program has left the block in\n\ -which its expression is valid.\n"); - - if (b->related_breakpoint) - b->related_breakpoint->disposition = disp_del_at_next_stop; - b->disposition = disp_del_at_next_stop; - - return WP_DELETED; - } -} - -/* Get a bpstat associated with having just stopped at address *PC - and frame address CORE_ADDRESS. Update *PC to point at the - breakpoint (if we hit a breakpoint). NOT_A_SW_BREAKPOINT is nonzero - if this is known to not be a real breakpoint (it could still be a - watchpoint, though). */ - -/* Determine whether we stopped at a breakpoint, etc, or whether we - don't understand this stop. Result is a chain of bpstat's such that: - - if we don't understand the stop, the result is a null pointer. - - if we understand why we stopped, the result is not null. - - Each element of the chain refers to a particular breakpoint or - watchpoint at which we have stopped. (We may have stopped for - several reasons concurrently.) - - Each element of the chain has valid next, breakpoint_at, - commands, FIXME??? fields. */ - -bpstat -bpstat_stop_status (CORE_ADDR *pc, int not_a_sw_breakpoint) -{ - register struct breakpoint *b, *temp; - CORE_ADDR bp_addr; - /* True if we've hit a breakpoint (as opposed to a watchpoint). */ - int real_breakpoint = 0; - /* Root of the chain of bpstat's */ - struct bpstats root_bs[1]; - /* Pointer to the last thing in the chain currently. */ - bpstat bs = root_bs; - static char message1[] = - "Error evaluating expression for watchpoint %d\n"; - char message[sizeof (message1) + 30 /* slop */ ]; - - /* Get the address where the breakpoint would have been. The - "not_a_sw_breakpoint" argument is meant to distinguish between a - breakpoint trap event and a trace/singlestep trap event. For a - trace/singlestep trap event, we would not want to subtract - DECR_PC_AFTER_BREAK from the PC. */ - - bp_addr = *pc - (not_a_sw_breakpoint ? 0 : DECR_PC_AFTER_BREAK); - - ALL_BREAKPOINTS_SAFE (b, temp) - { - if (b->enable_state == bp_disabled - || b->enable_state == bp_shlib_disabled - || b->enable_state == bp_call_disabled) - continue; - - if (b->type != bp_watchpoint - && b->type != bp_hardware_watchpoint - && b->type != bp_read_watchpoint - && b->type != bp_access_watchpoint - && b->type != bp_hardware_breakpoint - && b->type != bp_catch_fork - && b->type != bp_catch_vfork - && b->type != bp_catch_exec - && b->type != bp_catch_catch - && b->type != bp_catch_throw) /* a non-watchpoint bp */ - { - if (b->address != bp_addr) /* address doesn't match */ - continue; - if (overlay_debugging /* unmapped overlay section */ - && section_is_overlay (b->section) - && !section_is_mapped (b->section)) - continue; - } - - if (b->type == bp_hardware_breakpoint) - { - if (b->address != (*pc - DECR_PC_AFTER_HW_BREAK)) - continue; - if (overlay_debugging /* unmapped overlay section */ - && section_is_overlay (b->section) - && !section_is_mapped (b->section)) - continue; - } - - /* Is this a catchpoint of a load or unload? If so, did we - get a load or unload of the specified library? If not, - ignore it. */ - if ((b->type == bp_catch_load) -#if defined(SOLIB_HAVE_LOAD_EVENT) - && (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid)) - || ((b->dll_pathname != NULL) - && (strcmp (b->dll_pathname, - SOLIB_LOADED_LIBRARY_PATHNAME ( - PIDGET (inferior_ptid))) - != 0))) -#endif - ) - continue; - - if ((b->type == bp_catch_unload) -#if defined(SOLIB_HAVE_UNLOAD_EVENT) - && (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid)) - || ((b->dll_pathname != NULL) - && (strcmp (b->dll_pathname, - SOLIB_UNLOADED_LIBRARY_PATHNAME ( - PIDGET (inferior_ptid))) - != 0))) -#endif - ) - continue; - - if ((b->type == bp_catch_fork) - && !target_has_forked (PIDGET (inferior_ptid), - &b->forked_inferior_pid)) - continue; - - if ((b->type == bp_catch_vfork) - && !target_has_vforked (PIDGET (inferior_ptid), - &b->forked_inferior_pid)) - continue; - - if ((b->type == bp_catch_exec) - && !target_has_execd (PIDGET (inferior_ptid), &b->exec_pathname)) - continue; - - if (ep_is_exception_catchpoint (b) && - !(current_exception_event = target_get_current_exception_event ())) - continue; - - /* Come here if it's a watchpoint, or if the break address matches */ - - bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */ - - /* Watchpoints may change this, if not found to have triggered. */ - bs->stop = 1; - bs->print = 1; - - sprintf (message, message1, b->number); - if (b->type == bp_watchpoint || - b->type == bp_hardware_watchpoint) - { - switch (catch_errors (watchpoint_check, bs, message, - RETURN_MASK_ALL)) - { - case WP_DELETED: - /* We've already printed what needs to be printed. */ - /* Actually this is superfluous, because by the time we - call print_it_typical() the wp will be already deleted, - and the function will return immediately. */ - bs->print_it = print_it_done; - /* Stop. */ - break; - case WP_VALUE_CHANGED: - /* Stop. */ - ++(b->hit_count); - break; - case WP_VALUE_NOT_CHANGED: - /* Don't stop. */ - bs->print_it = print_it_noop; - bs->stop = 0; - continue; - default: - /* Can't happen. */ - /* FALLTHROUGH */ - case 0: - /* Error from catch_errors. */ - printf_filtered ("Watchpoint %d deleted.\n", b->number); - if (b->related_breakpoint) - b->related_breakpoint->disposition = disp_del_at_next_stop; - b->disposition = disp_del_at_next_stop; - /* We've already printed what needs to be printed. */ - bs->print_it = print_it_done; - - /* Stop. */ - break; - } - } - else if (b->type == bp_read_watchpoint || - b->type == bp_access_watchpoint) - { - CORE_ADDR addr; - struct value *v; - int found = 0; - - addr = target_stopped_data_address (); - if (addr == 0) - continue; - for (v = b->val_chain; v; v = v->next) - { - if (VALUE_LVAL (v) == lval_memory - && ! VALUE_LAZY (v)) - { - struct type *vtype = check_typedef (VALUE_TYPE (v)); - - if (v == b->val_chain - || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT - && TYPE_CODE (vtype) != TYPE_CODE_ARRAY)) - { - CORE_ADDR vaddr; - - vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); - /* Exact match not required. Within range is - sufficient. */ - if (addr >= vaddr && - addr < vaddr + TYPE_LENGTH (VALUE_TYPE (v))) - found = 1; - } - } - } - if (found) - switch (catch_errors (watchpoint_check, bs, message, - RETURN_MASK_ALL)) - { - case WP_DELETED: - /* We've already printed what needs to be printed. */ - bs->print_it = print_it_done; - /* Stop. */ - break; - case WP_VALUE_CHANGED: - if (b->type == bp_read_watchpoint) - { - /* Don't stop: read watchpoints shouldn't fire if - the value has changed. This is for targets which - cannot set read-only watchpoints. */ - bs->print_it = print_it_noop; - bs->stop = 0; - continue; - } - ++(b->hit_count); - break; - case WP_VALUE_NOT_CHANGED: - /* Stop. */ - ++(b->hit_count); - break; - default: - /* Can't happen. */ - case 0: - /* Error from catch_errors. */ - printf_filtered ("Watchpoint %d deleted.\n", b->number); - if (b->related_breakpoint) - b->related_breakpoint->disposition = disp_del_at_next_stop; - b->disposition = disp_del_at_next_stop; - /* We've already printed what needs to be printed. */ - bs->print_it = print_it_done; - break; - } - else /* found == 0 */ - { - /* This is a case where some watchpoint(s) triggered, - but not at the address of this watchpoint (FOUND - was left zero). So don't print anything for this - watchpoint. */ - bs->print_it = print_it_noop; - bs->stop = 0; - continue; - } - } - else - { - /* By definition, an encountered breakpoint is a triggered - breakpoint. */ - ++(b->hit_count); - - real_breakpoint = 1; - } - - if (b->frame && - b->frame != (get_current_frame ())->frame) - bs->stop = 0; - else - { - int value_is_zero = 0; - - if (b->cond) - { - /* Need to select the frame, with all that implies - so that the conditions will have the right context. */ - select_frame (get_current_frame ()); - value_is_zero - = catch_errors (breakpoint_cond_eval, (b->cond), - "Error in testing breakpoint condition:\n", - RETURN_MASK_ALL); - /* FIXME-someday, should give breakpoint # */ - free_all_values (); - } - if (b->cond && value_is_zero) - { - bs->stop = 0; - /* Don't consider this a hit. */ - --(b->hit_count); - } - else if (b->ignore_count > 0) - { - b->ignore_count--; - annotate_ignore_count_change (); - bs->stop = 0; - } - else - { - /* We will stop here */ - if (b->disposition == disp_disable) - b->enable_state = bp_disabled; - bs->commands = copy_command_lines (b->commands); - if (b->silent) - bs->print = 0; - if (bs->commands && - (STREQ ("silent", bs->commands->line) || - (xdb_commands && STREQ ("Q", bs->commands->line)))) - { - bs->commands = bs->commands->next; - bs->print = 0; - } - } - } - /* Print nothing for this entry if we dont stop or if we dont print. */ - if (bs->stop == 0 || bs->print == 0) - bs->print_it = print_it_noop; - } - - bs->next = NULL; /* Terminate the chain */ - bs = root_bs->next; /* Re-grab the head of the chain */ - - if (real_breakpoint && bs) - { - if (bs->breakpoint_at->type == bp_hardware_breakpoint) - { - if (DECR_PC_AFTER_HW_BREAK != 0) - { - *pc = *pc - DECR_PC_AFTER_HW_BREAK; - write_pc (*pc); - } - } - else - { - if (DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs) - { - *pc = bp_addr; -#if defined (SHIFT_INST_REGS) - SHIFT_INST_REGS (); -#else /* No SHIFT_INST_REGS. */ - write_pc (bp_addr); -#endif /* No SHIFT_INST_REGS. */ - } - } - } - - /* The value of a hardware watchpoint hasn't changed, but the - intermediate memory locations we are watching may have. */ - if (bs && !bs->stop && - (bs->breakpoint_at->type == bp_hardware_watchpoint || - bs->breakpoint_at->type == bp_read_watchpoint || - bs->breakpoint_at->type == bp_access_watchpoint)) - { - remove_breakpoints (); - insert_breakpoints (); - } - return bs; -} - -/* Tell what to do about this bpstat. */ -struct bpstat_what -bpstat_what (bpstat bs) -{ - /* Classify each bpstat as one of the following. */ - enum class - { - /* This bpstat element has no effect on the main_action. */ - no_effect = 0, - - /* There was a watchpoint, stop but don't print. */ - wp_silent, - - /* There was a watchpoint, stop and print. */ - wp_noisy, - - /* There was a breakpoint but we're not stopping. */ - bp_nostop, - - /* There was a breakpoint, stop but don't print. */ - bp_silent, - - /* There was a breakpoint, stop and print. */ - bp_noisy, - - /* We hit the longjmp breakpoint. */ - long_jump, - - /* We hit the longjmp_resume breakpoint. */ - long_resume, - - /* We hit the step_resume breakpoint. */ - step_resume, - - /* We hit the through_sigtramp breakpoint. */ - through_sig, - - /* We hit the shared library event breakpoint. */ - shlib_event, - - /* We caught a shared library event. */ - catch_shlib_event, - - /* This is just used to count how many enums there are. */ - class_last - }; - - /* Here is the table which drives this routine. So that we can - format it pretty, we define some abbreviations for the - enum bpstat_what codes. */ -#define kc BPSTAT_WHAT_KEEP_CHECKING -#define ss BPSTAT_WHAT_STOP_SILENT -#define sn BPSTAT_WHAT_STOP_NOISY -#define sgl BPSTAT_WHAT_SINGLE -#define slr BPSTAT_WHAT_SET_LONGJMP_RESUME -#define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME -#define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE -#define sr BPSTAT_WHAT_STEP_RESUME -#define ts BPSTAT_WHAT_THROUGH_SIGTRAMP -#define shl BPSTAT_WHAT_CHECK_SHLIBS -#define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK - -/* "Can't happen." Might want to print an error message. - abort() is not out of the question, but chances are GDB is just - a bit confused, not unusable. */ -#define err BPSTAT_WHAT_STOP_NOISY - - /* Given an old action and a class, come up with a new action. */ - /* One interesting property of this table is that wp_silent is the same - as bp_silent and wp_noisy is the same as bp_noisy. That is because - after stopping, the check for whether to step over a breakpoint - (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without - reference to how we stopped. We retain separate wp_silent and - bp_silent codes in case we want to change that someday. - - Another possibly interesting property of this table is that - there's a partial ordering, priority-like, of the actions. Once - you've decided that some action is appropriate, you'll never go - back and decide something of a lower priority is better. The - ordering is: - - kc < clr sgl shl shlr slr sn sr ss ts - sgl < clrs shl shlr slr sn sr ss ts - slr < err shl shlr sn sr ss ts - clr < clrs err shl shlr sn sr ss ts - clrs < err shl shlr sn sr ss ts - ss < shl shlr sn sr ts - sn < shl shlr sr ts - sr < shl shlr ts - shl < shlr - ts < - shlr < - - What I think this means is that we don't need a damned table - here. If you just put the rows and columns in the right order, - it'd look awfully regular. We could simply walk the bpstat list - and choose the highest priority action we find, with a little - logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/ - CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says - is messy anyway). */ - - /* step_resume entries: a step resume breakpoint overrides another - breakpoint of signal handling (see comment in wait_for_inferior - at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */ - /* We handle the through_sigtramp_breakpoint the same way; having both - one of those and a step_resume_breakpoint is probably very rare (?). */ - - static const enum bpstat_what_main_action - table[(int) class_last][(int) BPSTAT_WHAT_LAST] = - { - /* old action */ - /* kc ss sn sgl slr clr clrs sr ts shl shlr - */ -/*no_effect */ - {kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl, shlr}, -/*wp_silent */ - {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr}, -/*wp_noisy */ - {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr}, -/*bp_nostop */ - {sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl, shlr}, -/*bp_silent */ - {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr}, -/*bp_noisy */ - {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr}, -/*long_jump */ - {slr, ss, sn, slr, slr, err, err, sr, ts, shl, shlr}, -/*long_resume */ - {clr, ss, sn, clrs, err, err, err, sr, ts, shl, shlr}, -/*step_resume */ - {sr, sr, sr, sr, sr, sr, sr, sr, ts, shl, shlr}, -/*through_sig */ - {ts, ts, ts, ts, ts, ts, ts, ts, ts, shl, shlr}, -/*shlib */ - {shl, shl, shl, shl, shl, shl, shl, shl, ts, shl, shlr}, -/*catch_shlib */ - {shlr, shlr, shlr, shlr, shlr, shlr, shlr, shlr, ts, shlr, shlr} - }; - -#undef kc -#undef ss -#undef sn -#undef sgl -#undef slr -#undef clr -#undef clrs -#undef err -#undef sr -#undef ts -#undef shl -#undef shlr - enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING; - struct bpstat_what retval; - - retval.call_dummy = 0; - for (; bs != NULL; bs = bs->next) - { - enum class bs_class = no_effect; - if (bs->breakpoint_at == NULL) - /* I suspect this can happen if it was a momentary breakpoint - which has since been deleted. */ - continue; - switch (bs->breakpoint_at->type) - { - case bp_none: - continue; - - case bp_breakpoint: - case bp_hardware_breakpoint: - case bp_until: - case bp_finish: - if (bs->stop) - { - if (bs->print) - bs_class = bp_noisy; - else - bs_class = bp_silent; - } - else - bs_class = bp_nostop; - break; - case bp_watchpoint: - case bp_hardware_watchpoint: - case bp_read_watchpoint: - case bp_access_watchpoint: - if (bs->stop) - { - if (bs->print) - bs_class = wp_noisy; - else - bs_class = wp_silent; - } - else - /* There was a watchpoint, but we're not stopping. - This requires no further action. */ - bs_class = no_effect; - break; - case bp_longjmp: - bs_class = long_jump; - break; - case bp_longjmp_resume: - bs_class = long_resume; - break; - case bp_step_resume: - if (bs->stop) - { - bs_class = step_resume; - } - else - /* It is for the wrong frame. */ - bs_class = bp_nostop; - break; - case bp_through_sigtramp: - bs_class = through_sig; - break; - case bp_watchpoint_scope: - bs_class = bp_nostop; - break; - case bp_shlib_event: - bs_class = shlib_event; - break; - case bp_thread_event: - case bp_overlay_event: - bs_class = bp_nostop; - break; - case bp_catch_load: - case bp_catch_unload: - /* Only if this catchpoint triggered should we cause the - step-out-of-dld behaviour. Otherwise, we ignore this - catchpoint. */ - if (bs->stop) - bs_class = catch_shlib_event; - else - bs_class = no_effect; - break; - case bp_catch_fork: - case bp_catch_vfork: - case bp_catch_exec: - if (bs->stop) - { - if (bs->print) - bs_class = bp_noisy; - else - bs_class = bp_silent; - } - else - /* There was a catchpoint, but we're not stopping. - This requires no further action. */ - bs_class = no_effect; - break; - case bp_catch_catch: - if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_CATCH) - bs_class = bp_nostop; - else if (bs->stop) - bs_class = bs->print ? bp_noisy : bp_silent; - break; - case bp_catch_throw: - if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_THROW) - bs_class = bp_nostop; - else if (bs->stop) - bs_class = bs->print ? bp_noisy : bp_silent; - break; - case bp_call_dummy: - /* Make sure the action is stop (silent or noisy), - so infrun.c pops the dummy frame. */ - bs_class = bp_silent; - retval.call_dummy = 1; - break; - } - current_action = table[(int) bs_class][(int) current_action]; - } - retval.main_action = current_action; - return retval; -} - -/* Nonzero if we should step constantly (e.g. watchpoints on machines - without hardware support). This isn't related to a specific bpstat, - just to things like whether watchpoints are set. */ - -int -bpstat_should_step (void) -{ - struct breakpoint *b; - ALL_BREAKPOINTS (b) - if (b->enable_state == bp_enabled && b->type == bp_watchpoint) - return 1; - return 0; -} - -/* Nonzero if there are enabled hardware watchpoints. */ -int -bpstat_have_active_hw_watchpoints (void) -{ - struct breakpoint *b; - ALL_BREAKPOINTS (b) - if ((b->enable_state == bp_enabled) && - (b->inserted) && - ((b->type == bp_hardware_watchpoint) || - (b->type == bp_read_watchpoint) || - (b->type == bp_access_watchpoint))) - return 1; - return 0; -} - - -/* Given a bpstat that records zero or more triggered eventpoints, this - function returns another bpstat which contains only the catchpoints - on that first list, if any. */ -void -bpstat_get_triggered_catchpoints (bpstat ep_list, bpstat *cp_list) -{ - struct bpstats root_bs[1]; - bpstat bs = root_bs; - struct breakpoint *ep; - char *dll_pathname; - - bpstat_clear (cp_list); - root_bs->next = NULL; - - for (; ep_list != NULL; ep_list = ep_list->next) - { - /* Is this eventpoint a catchpoint? If not, ignore it. */ - ep = ep_list->breakpoint_at; - if (ep == NULL) - break; - if ((ep->type != bp_catch_load) && - (ep->type != bp_catch_unload) && - (ep->type != bp_catch_catch) && - (ep->type != bp_catch_throw)) - /* pai: (temp) ADD fork/vfork here!! */ - continue; - - /* Yes; add it to the list. */ - bs = bpstat_alloc (ep, bs); - *bs = *ep_list; - bs->next = NULL; - bs = root_bs->next; - -#if defined(SOLIB_ADD) - /* Also, for each triggered catchpoint, tag it with the name of - the library that caused this trigger. (We copy the name now, - because it's only guaranteed to be available NOW, when the - catchpoint triggers. Clients who may wish to know the name - later must get it from the catchpoint itself.) */ - if (ep->triggered_dll_pathname != NULL) - xfree (ep->triggered_dll_pathname); - if (ep->type == bp_catch_load) - dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME ( - PIDGET (inferior_ptid)); - else - dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME ( - PIDGET (inferior_ptid)); -#else - dll_pathname = NULL; -#endif - if (dll_pathname) - { - ep->triggered_dll_pathname = (char *) - xmalloc (strlen (dll_pathname) + 1); - strcpy (ep->triggered_dll_pathname, dll_pathname); - } - else - ep->triggered_dll_pathname = NULL; - } - - *cp_list = bs; -} - -/* Print B to gdb_stdout. */ -static void -print_one_breakpoint (struct breakpoint *b, - CORE_ADDR *last_addr) -{ - register struct command_line *l; - register struct symbol *sym; - struct ep_type_description - { - enum bptype type; - char *description; - }; - static struct ep_type_description bptypes[] = - { - {bp_none, "?deleted?"}, - {bp_breakpoint, "breakpoint"}, - {bp_hardware_breakpoint, "hw breakpoint"}, - {bp_until, "until"}, - {bp_finish, "finish"}, - {bp_watchpoint, "watchpoint"}, - {bp_hardware_watchpoint, "hw watchpoint"}, - {bp_read_watchpoint, "read watchpoint"}, - {bp_access_watchpoint, "acc watchpoint"}, - {bp_longjmp, "longjmp"}, - {bp_longjmp_resume, "longjmp resume"}, - {bp_step_resume, "step resume"}, - {bp_through_sigtramp, "sigtramp"}, - {bp_watchpoint_scope, "watchpoint scope"}, - {bp_call_dummy, "call dummy"}, - {bp_shlib_event, "shlib events"}, - {bp_thread_event, "thread events"}, - {bp_overlay_event, "overlay events"}, - {bp_catch_load, "catch load"}, - {bp_catch_unload, "catch unload"}, - {bp_catch_fork, "catch fork"}, - {bp_catch_vfork, "catch vfork"}, - {bp_catch_exec, "catch exec"}, - {bp_catch_catch, "catch catch"}, - {bp_catch_throw, "catch throw"} - }; - - static char *bpdisps[] = - {"del", "dstp", "dis", "keep"}; - static char bpenables[] = "nynny"; - char wrap_indent[80]; - struct ui_stream *stb = ui_out_stream_new (uiout); - struct cleanup *old_chain = make_cleanup_ui_out_stream_delete (stb); - - annotate_record (); - ui_out_tuple_begin (uiout, "bkpt"); - - /* 1 */ - annotate_field (0); - ui_out_field_int (uiout, "number", b->number); - - /* 2 */ - annotate_field (1); - if (((int) b->type > (sizeof (bptypes) / sizeof (bptypes[0]))) - || ((int) b->type != bptypes[(int) b->type].type)) - internal_error (__FILE__, __LINE__, - "bptypes table does not describe type #%d.", - (int) b->type); - ui_out_field_string (uiout, "type", bptypes[(int) b->type].description); - - /* 3 */ - annotate_field (2); - ui_out_field_string (uiout, "disp", bpdisps[(int) b->disposition]); - - /* 4 */ - annotate_field (3); - ui_out_field_fmt (uiout, "enabled", "%c", bpenables[(int) b->enable_state]); - ui_out_spaces (uiout, 2); - - /* 5 and 6 */ - strcpy (wrap_indent, " "); - if (addressprint) - { - if (TARGET_ADDR_BIT <= 32) - strcat (wrap_indent, " "); - else - strcat (wrap_indent, " "); - } - switch (b->type) - { - case bp_none: - internal_error (__FILE__, __LINE__, - "print_one_breakpoint: bp_none encountered\n"); - break; - - case bp_watchpoint: - case bp_hardware_watchpoint: - case bp_read_watchpoint: - case bp_access_watchpoint: - /* Field 4, the address, is omitted (which makes the columns - not line up too nicely with the headers, but the effect - is relatively readable). */ - if (addressprint) - ui_out_field_skip (uiout, "addr"); - annotate_field (5); - print_expression (b->exp, stb->stream); - ui_out_field_stream (uiout, "what", stb); - break; - - case bp_catch_load: - case bp_catch_unload: - /* Field 4, the address, is omitted (which makes the columns - not line up too nicely with the headers, but the effect - is relatively readable). */ - if (addressprint) - ui_out_field_skip (uiout, "addr"); - annotate_field (5); - if (b->dll_pathname == NULL) - { - ui_out_field_string (uiout, "what", "<any library>"); - ui_out_spaces (uiout, 1); - } - else - { - ui_out_text (uiout, "library \""); - ui_out_field_string (uiout, "what", b->dll_pathname); - ui_out_text (uiout, "\" "); - } - break; - - case bp_catch_fork: - case bp_catch_vfork: - /* Field 4, the address, is omitted (which makes the columns - not line up too nicely with the headers, but the effect - is relatively readable). */ - if (addressprint) - ui_out_field_skip (uiout, "addr"); - annotate_field (5); - if (b->forked_inferior_pid != 0) - { - ui_out_text (uiout, "process "); - ui_out_field_int (uiout, "what", b->forked_inferior_pid); - ui_out_spaces (uiout, 1); - } - - case bp_catch_exec: - /* Field 4, the address, is omitted (which makes the columns - not line up too nicely with the headers, but the effect - is relatively readable). */ - if (addressprint) - ui_out_field_skip (uiout, "addr"); - annotate_field (5); - if (b->exec_pathname != NULL) - { - ui_out_text (uiout, "program \""); - ui_out_field_string (uiout, "what", b->exec_pathname); - ui_out_text (uiout, "\" "); - } - break; - - case bp_catch_catch: - /* Field 4, the address, is omitted (which makes the columns - not line up too nicely with the headers, but the effect - is relatively readable). */ - if (addressprint) - ui_out_field_skip (uiout, "addr"); - annotate_field (5); - ui_out_field_string (uiout, "what", "exception catch"); - ui_out_spaces (uiout, 1); - break; - - case bp_catch_throw: - /* Field 4, the address, is omitted (which makes the columns - not line up too nicely with the headers, but the effect - is relatively readable). */ - if (addressprint) - ui_out_field_skip (uiout, "addr"); - annotate_field (5); - ui_out_field_string (uiout, "what", "exception throw"); - ui_out_spaces (uiout, 1); - break; - - case bp_breakpoint: - case bp_hardware_breakpoint: - case bp_until: - case bp_finish: - case bp_longjmp: - case bp_longjmp_resume: - case bp_step_resume: - case bp_through_sigtramp: - case bp_watchpoint_scope: - case bp_call_dummy: - case bp_shlib_event: - case bp_thread_event: - case bp_overlay_event: - if (addressprint) - { - annotate_field (4); - ui_out_field_core_addr (uiout, "addr", b->address); - } - annotate_field (5); - *last_addr = b->address; - if (b->source_file) - { - sym = find_pc_sect_function (b->address, b->section); - if (sym) - { - ui_out_text (uiout, "in "); - ui_out_field_string (uiout, "func", - SYMBOL_SOURCE_NAME (sym)); - ui_out_wrap_hint (uiout, wrap_indent); - ui_out_text (uiout, " at "); - } - ui_out_field_string (uiout, "file", b->source_file); - ui_out_text (uiout, ":"); - ui_out_field_int (uiout, "line", b->line_number); - } - else - { - print_address_symbolic (b->address, stb->stream, demangle, ""); - ui_out_field_stream (uiout, "at", stb); - } - break; - } - - if (b->thread != -1) - { - /* FIXME: This seems to be redundant and lost here; see the - "stop only in" line a little further down. */ - ui_out_text (uiout, " thread "); - ui_out_field_int (uiout, "thread", b->thread); - } - - ui_out_text (uiout, "\n"); - - if (b->frame) - { - annotate_field (6); - ui_out_text (uiout, "\tstop only in stack frame at "); - ui_out_field_core_addr (uiout, "frame", b->frame); - ui_out_text (uiout, "\n"); - } - - if (b->cond) - { - annotate_field (7); - ui_out_text (uiout, "\tstop only if "); - print_expression (b->cond, stb->stream); - ui_out_field_stream (uiout, "cond", stb); - ui_out_text (uiout, "\n"); - } - - if (b->thread != -1) - { - /* FIXME should make an annotation for this */ - ui_out_text (uiout, "\tstop only in thread "); - ui_out_field_int (uiout, "thread", b->thread); - ui_out_text (uiout, "\n"); - } - - if (show_breakpoint_hit_counts && b->hit_count) - { - /* FIXME should make an annotation for this */ - if (ep_is_catchpoint (b)) - ui_out_text (uiout, "\tcatchpoint"); - else - ui_out_text (uiout, "\tbreakpoint"); - ui_out_text (uiout, " already hit "); - ui_out_field_int (uiout, "times", b->hit_count); - if (b->hit_count == 1) - ui_out_text (uiout, " time\n"); - else - ui_out_text (uiout, " times\n"); - } - - /* Output the count also if it is zero, but only if this is - mi. FIXME: Should have a better test for this. */ - if (ui_out_is_mi_like_p (uiout)) - if (show_breakpoint_hit_counts && b->hit_count == 0) - ui_out_field_int (uiout, "times", b->hit_count); - - if (b->ignore_count) - { - annotate_field (8); - ui_out_text (uiout, "\tignore next "); - ui_out_field_int (uiout, "ignore", b->ignore_count); - ui_out_text (uiout, " hits\n"); - } - - if ((l = b->commands)) - { - annotate_field (9); - ui_out_tuple_begin (uiout, "script"); - print_command_lines (uiout, l, 4); - ui_out_tuple_end (uiout); - } - ui_out_tuple_end (uiout); - do_cleanups (old_chain); -} - -struct captured_breakpoint_query_args - { - int bnum; - }; - -static int -do_captured_breakpoint_query (struct ui_out *uiout, void *data) -{ - struct captured_breakpoint_query_args *args = data; - register struct breakpoint *b; - CORE_ADDR dummy_addr = 0; - ALL_BREAKPOINTS (b) - { - if (args->bnum == b->number) - { - print_one_breakpoint (b, &dummy_addr); - return GDB_RC_OK; - } - } - return GDB_RC_NONE; -} - -enum gdb_rc -gdb_breakpoint_query (struct ui_out *uiout, int bnum) -{ - struct captured_breakpoint_query_args args; - args.bnum = bnum; - /* For the moment we don't trust print_one_breakpoint() to not throw - an error. */ - return catch_exceptions (uiout, do_captured_breakpoint_query, &args, - NULL, RETURN_MASK_ALL); -} - -/* Return non-zero if B is user settable (breakpoints, watchpoints, - catchpoints, et.al.). */ - -static int -user_settable_breakpoint (const struct breakpoint *b) -{ - return (b->type == bp_breakpoint - || b->type == bp_catch_load - || b->type == bp_catch_unload - || b->type == bp_catch_fork - || b->type == bp_catch_vfork - || b->type == bp_catch_exec - || b->type == bp_catch_catch - || b->type == bp_catch_throw - || b->type == bp_hardware_breakpoint - || b->type == bp_watchpoint - || b->type == bp_read_watchpoint - || b->type == bp_access_watchpoint - || b->type == bp_hardware_watchpoint); -} - -/* Print information on user settable breakpoint (watchpoint, etc) - number BNUM. If BNUM is -1 print all user settable breakpoints. - If ALLFLAG is non-zero, include non- user settable breakpoints. */ - -static void -breakpoint_1 (int bnum, int allflag) -{ - register struct breakpoint *b; - CORE_ADDR last_addr = (CORE_ADDR) -1; - int nr_printable_breakpoints; - - /* Compute the number of rows in the table. */ - nr_printable_breakpoints = 0; - ALL_BREAKPOINTS (b) - if (bnum == -1 - || bnum == b->number) - { - if (allflag || user_settable_breakpoint (b)) - nr_printable_breakpoints++; - } - - if (addressprint) - ui_out_table_begin (uiout, 6, nr_printable_breakpoints, "BreakpointTable"); - else - ui_out_table_begin (uiout, 5, nr_printable_breakpoints, "BreakpointTable"); - - if (nr_printable_breakpoints > 0) - annotate_breakpoints_headers (); - if (nr_printable_breakpoints > 0) - annotate_field (0); - ui_out_table_header (uiout, 3, ui_left, "number", "Num"); /* 1 */ - if (nr_printable_breakpoints > 0) - annotate_field (1); - ui_out_table_header (uiout, 14, ui_left, "type", "Type"); /* 2 */ - if (nr_printable_breakpoints > 0) - annotate_field (2); - ui_out_table_header (uiout, 4, ui_left, "disp", "Disp"); /* 3 */ - if (nr_printable_breakpoints > 0) - annotate_field (3); - ui_out_table_header (uiout, 3, ui_left, "enabled", "Enb"); /* 4 */ - if (addressprint) - { - if (nr_printable_breakpoints > 0) - annotate_field (4); - if (TARGET_ADDR_BIT <= 32) - ui_out_table_header (uiout, 10, ui_left, "addr", "Address");/* 5 */ - else - ui_out_table_header (uiout, 18, ui_left, "addr", "Address");/* 5 */ - } - if (nr_printable_breakpoints > 0) - annotate_field (5); - ui_out_table_header (uiout, 40, ui_noalign, "what", "What"); /* 6 */ - ui_out_table_body (uiout); - if (nr_printable_breakpoints > 0) - annotate_breakpoints_table (); - - ALL_BREAKPOINTS (b) - if (bnum == -1 - || bnum == b->number) - { - /* We only print out user settable breakpoints unless the - allflag is set. */ - if (allflag || user_settable_breakpoint (b)) - print_one_breakpoint (b, &last_addr); - } - - ui_out_table_end (uiout); - - if (nr_printable_breakpoints == 0) - { - if (bnum == -1) - ui_out_message (uiout, 0, "No breakpoints or watchpoints.\n"); - else - ui_out_message (uiout, 0, "No breakpoint or watchpoint number %d.\n", - bnum); - } - else - { - /* Compare against (CORE_ADDR)-1 in case some compiler decides - that a comparison of an unsigned with -1 is always false. */ - if (last_addr != (CORE_ADDR) -1) - set_next_address (last_addr); - } - - /* FIXME? Should this be moved up so that it is only called when - there have been breakpoints? */ - annotate_breakpoints_table_end (); -} - -/* ARGSUSED */ -static void -breakpoints_info (char *bnum_exp, int from_tty) -{ - int bnum = -1; - - if (bnum_exp) - bnum = parse_and_eval_long (bnum_exp); - - breakpoint_1 (bnum, 0); -} - -/* ARGSUSED */ -static void -maintenance_info_breakpoints (char *bnum_exp, int from_tty) -{ - int bnum = -1; - - if (bnum_exp) - bnum = parse_and_eval_long (bnum_exp); - - breakpoint_1 (bnum, 1); -} - -/* Print a message describing any breakpoints set at PC. */ - -static void -describe_other_breakpoints (CORE_ADDR pc, asection *section) -{ - register int others = 0; - register struct breakpoint *b; - - ALL_BREAKPOINTS (b) - if (b->address == pc) /* address match / overlay match */ - if (!overlay_debugging || b->section == section) - others++; - if (others > 0) - { - printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : ""); - ALL_BREAKPOINTS (b) - if (b->address == pc) /* address match / overlay match */ - if (!overlay_debugging || b->section == section) - { - others--; - printf_filtered ("%d%s%s ", - b->number, - ((b->enable_state == bp_disabled || - b->enable_state == bp_shlib_disabled || - b->enable_state == bp_call_disabled) - ? " (disabled)" - : b->enable_state == bp_permanent - ? " (permanent)" - : ""), - (others > 1) ? "," - : ((others == 1) ? " and" : "")); - } - printf_filtered ("also set at pc "); - print_address_numeric (pc, 1, gdb_stdout); - printf_filtered (".\n"); - } -} - -/* Set the default place to put a breakpoint - for the `break' command with no arguments. */ - -void -set_default_breakpoint (int valid, CORE_ADDR addr, struct symtab *symtab, - int line) -{ - default_breakpoint_valid = valid; - default_breakpoint_address = addr; - default_breakpoint_symtab = symtab; - default_breakpoint_line = line; -} - -/* Return true iff it is meaningful to use the address member of - BPT. For some breakpoint types, the address member is irrelevant - and it makes no sense to attempt to compare it to other addresses - (or use it for any other purpose either). - - More specifically, each of the following breakpoint types will always - have a zero valued address and we don't want check_duplicates() to mark - breakpoints of any of these types to be a duplicate of an actual - breakpoint at address zero: - - bp_watchpoint - bp_hardware_watchpoint - bp_read_watchpoint - bp_access_watchpoint - bp_catch_exec - bp_longjmp_resume - bp_catch_fork - bp_catch_vork */ - -static int -breakpoint_address_is_meaningful (struct breakpoint *bpt) -{ - enum bptype type = bpt->type; - - return (type != bp_watchpoint - && type != bp_hardware_watchpoint - && type != bp_read_watchpoint - && type != bp_access_watchpoint - && type != bp_catch_exec - && type != bp_longjmp_resume - && type != bp_catch_fork - && type != bp_catch_vfork); -} - -/* Rescan breakpoints at the same address and section as BPT, - marking the first one as "first" and any others as "duplicates". - This is so that the bpt instruction is only inserted once. - If we have a permanent breakpoint at the same place as BPT, make - that one the official one, and the rest as duplicates. */ - -static void -check_duplicates (struct breakpoint *bpt) -{ - register struct breakpoint *b; - register int count = 0; - struct breakpoint *perm_bp = 0; - CORE_ADDR address = bpt->address; - asection *section = bpt->section; - - if (! breakpoint_address_is_meaningful (bpt)) - return; - - ALL_BREAKPOINTS (b) - if (b->enable_state != bp_disabled - && b->enable_state != bp_shlib_disabled - && b->enable_state != bp_call_disabled - && b->address == address /* address / overlay match */ - && (!overlay_debugging || b->section == section) - && breakpoint_address_is_meaningful (b)) - { - /* Have we found a permanent breakpoint? */ - if (b->enable_state == bp_permanent) - { - perm_bp = b; - break; - } - - count++; - b->duplicate = count > 1; - } - - /* If we found a permanent breakpoint at this address, go over the - list again and declare all the other breakpoints there to be the - duplicates. */ - if (perm_bp) - { - perm_bp->duplicate = 0; - - /* Permanent breakpoint should always be inserted. */ - if (! perm_bp->inserted) - internal_error (__FILE__, __LINE__, - "allegedly permanent breakpoint is not " - "actually inserted"); - - ALL_BREAKPOINTS (b) - if (b != perm_bp) - { - if (b->inserted) - internal_error (__FILE__, __LINE__, - "another breakpoint was inserted on top of " - "a permanent breakpoint"); - - if (b->enable_state != bp_disabled - && b->enable_state != bp_shlib_disabled - && b->enable_state != bp_call_disabled - && b->address == address /* address / overlay match */ - && (!overlay_debugging || b->section == section) - && breakpoint_address_is_meaningful (b)) - b->duplicate = 1; - } - } -} - -/* set_raw_breakpoint() is a low level routine for allocating and - partially initializing a breakpoint of type BPTYPE. The newly - created breakpoint's address, section, source file name, and line - number are provided by SAL. The newly created and partially - initialized breakpoint is added to the breakpoint chain and - is also returned as the value of this function. - - It is expected that the caller will complete the initialization of - the newly created breakpoint struct as well as output any status - information regarding the creation of a new breakpoint. In - particular, set_raw_breakpoint() does NOT set the breakpoint - number! Care should be taken to not allow an error() to occur - prior to completing the initialization of the breakpoint. If this - should happen, a bogus breakpoint will be left on the chain. */ - -struct breakpoint * -set_raw_breakpoint (struct symtab_and_line sal, enum bptype bptype) -{ - register struct breakpoint *b, *b1; - - b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint)); - memset (b, 0, sizeof (*b)); - b->address = sal.pc; - if (sal.symtab == NULL) - b->source_file = NULL; - else - b->source_file = savestring (sal.symtab->filename, - strlen (sal.symtab->filename)); - b->section = sal.section; - b->type = bptype; - b->language = current_language->la_language; - b->input_radix = input_radix; - b->thread = -1; - b->line_number = sal.line; - b->enable_state = bp_enabled; - b->next = 0; - b->silent = 0; - b->ignore_count = 0; - b->commands = NULL; - b->frame = 0; - b->dll_pathname = NULL; - b->triggered_dll_pathname = NULL; - b->forked_inferior_pid = 0; - b->exec_pathname = NULL; - - /* Add this breakpoint to the end of the chain - so that a list of breakpoints will come out in order - of increasing numbers. */ - - b1 = breakpoint_chain; - if (b1 == 0) - breakpoint_chain = b; - else - { - while (b1->next) - b1 = b1->next; - b1->next = b; - } - - check_duplicates (b); - breakpoints_changed (); - - return b; -} - - -/* Note that the breakpoint object B describes a permanent breakpoint - instruction, hard-wired into the inferior's code. */ -void -make_breakpoint_permanent (struct breakpoint *b) -{ - b->enable_state = bp_permanent; - - /* By definition, permanent breakpoints are already present in the code. */ - b->inserted = 1; -} - -static struct breakpoint * -create_internal_breakpoint (CORE_ADDR address, enum bptype type) -{ - static int internal_breakpoint_number = -1; - struct symtab_and_line sal; - struct breakpoint *b; - - INIT_SAL (&sal); /* initialize to zeroes */ - - sal.pc = address; - sal.section = find_pc_overlay (sal.pc); - - b = set_raw_breakpoint (sal, type); - b->number = internal_breakpoint_number--; - b->disposition = disp_donttouch; - - return b; -} - - -static void -create_longjmp_breakpoint (char *func_name) -{ - struct breakpoint *b; - struct minimal_symbol *m; - - if (func_name == NULL) - b = create_internal_breakpoint (0, bp_longjmp_resume); - else - { - if ((m = lookup_minimal_symbol_text (func_name, NULL, NULL)) == NULL) - return; - - b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m), bp_longjmp); - } - - b->enable_state = bp_disabled; - b->silent = 1; - if (func_name) - b->addr_string = xstrdup (func_name); -} - -/* Call this routine when stepping and nexting to enable a breakpoint - if we do a longjmp(). When we hit that breakpoint, call - set_longjmp_resume_breakpoint() to figure out where we are going. */ - -void -enable_longjmp_breakpoint (void) -{ - register struct breakpoint *b; - - ALL_BREAKPOINTS (b) - if (b->type == bp_longjmp) - { - b->enable_state = bp_enabled; - check_duplicates (b); - } -} - -void -disable_longjmp_breakpoint (void) -{ - register struct breakpoint *b; - - ALL_BREAKPOINTS (b) - if (b->type == bp_longjmp - || b->type == bp_longjmp_resume) - { - b->enable_state = bp_disabled; - check_duplicates (b); - } -} - -static void -create_overlay_event_breakpoint (char *func_name) -{ - struct breakpoint *b; - struct minimal_symbol *m; - - if ((m = lookup_minimal_symbol_text (func_name, NULL, NULL)) == NULL) - return; - - b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m), - bp_overlay_event); - b->addr_string = xstrdup (func_name); - - if (overlay_debugging == ovly_auto) - { - b->enable_state = bp_enabled; - overlay_events_enabled = 1; - } - else - { - b->enable_state = bp_disabled; - overlay_events_enabled = 0; - } -} - -void -enable_overlay_breakpoints (void) -{ - register struct breakpoint *b; - - ALL_BREAKPOINTS (b) - if (b->type == bp_overlay_event) - { - b->enable_state = bp_enabled; - check_duplicates (b); - overlay_events_enabled = 1; - } -} - -void -disable_overlay_breakpoints (void) -{ - register struct breakpoint *b; - - ALL_BREAKPOINTS (b) - if (b->type == bp_overlay_event) - { - b->enable_state = bp_disabled; - check_duplicates (b); - overlay_events_enabled = 0; - } -} - -struct breakpoint * -create_thread_event_breakpoint (CORE_ADDR address) -{ - struct breakpoint *b; - char addr_string[80]; /* Surely an addr can't be longer than that. */ - - b = create_internal_breakpoint (address, bp_thread_event); - - b->enable_state = bp_enabled; - /* addr_string has to be used or breakpoint_re_set will delete me. */ - sprintf (addr_string, "*0x%s", paddr (b->address)); - b->addr_string = xstrdup (addr_string); - - return b; -} - -void -remove_thread_event_breakpoints (void) -{ - struct breakpoint *b, *temp; - - ALL_BREAKPOINTS_SAFE (b, temp) - if (b->type == bp_thread_event) - delete_breakpoint (b); -} - -#ifdef SOLIB_ADD -void -remove_solib_event_breakpoints (void) -{ - register struct breakpoint *b, *temp; - - ALL_BREAKPOINTS_SAFE (b, temp) - if (b->type == bp_shlib_event) - delete_breakpoint (b); -} - -struct breakpoint * -create_solib_event_breakpoint (CORE_ADDR address) -{ - struct breakpoint *b; - - b = create_internal_breakpoint (address, bp_shlib_event); - return b; -} - -/* Disable any breakpoints that are on code in shared libraries. Only - apply to enabled breakpoints, disabled ones can just stay disabled. */ - -void -disable_breakpoints_in_shlibs (int silent) -{ - struct breakpoint *b; - int disabled_shlib_breaks = 0; - - /* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */ - ALL_BREAKPOINTS (b) - { -#if defined (PC_SOLIB) - if (((b->type == bp_breakpoint) || - (b->type == bp_hardware_breakpoint)) && - b->enable_state == bp_enabled && - !b->duplicate && - PC_SOLIB (b->address)) - { - b->enable_state = bp_shlib_disabled; - if (!silent) - { - if (!disabled_shlib_breaks) - { - target_terminal_ours_for_output (); - warning ("Temporarily disabling shared library breakpoints:"); - } - disabled_shlib_breaks = 1; - warning ("breakpoint #%d ", b->number); - } - } -#endif - } -} - -/* Try to reenable any breakpoints in shared libraries. */ -void -re_enable_breakpoints_in_shlibs (void) -{ - struct breakpoint *b; - - ALL_BREAKPOINTS (b) - if (b->enable_state == bp_shlib_disabled) - { - char buf[1]; - - /* Do not reenable the breakpoint if the shared library - is still not mapped in. */ - if (target_read_memory (b->address, buf, 1) == 0) - b->enable_state = bp_enabled; - } -} - -#endif - -static void -solib_load_unload_1 (char *hookname, int tempflag, char *dll_pathname, - char *cond_string, enum bptype bp_kind) -{ - struct breakpoint *b; - struct symtabs_and_lines sals; - struct cleanup *old_chain; - struct cleanup *canonical_strings_chain = NULL; - char *addr_start = hookname; - char *addr_end = NULL; - char **canonical = (char **) NULL; - int thread = -1; /* All threads. */ - - /* Set a breakpoint on the specified hook. */ - sals = decode_line_1 (&hookname, 1, (struct symtab *) NULL, 0, &canonical); - addr_end = hookname; - - if (sals.nelts == 0) - { - warning ("Unable to set a breakpoint on dynamic linker callback."); - warning ("Suggest linking with /opt/langtools/lib/end.o."); - warning ("GDB will be unable to track shl_load/shl_unload calls"); - return; - } - if (sals.nelts != 1) - { - warning ("Unable to set unique breakpoint on dynamic linker callback."); - warning ("GDB will be unable to track shl_load/shl_unload calls"); - return; - } - - /* Make sure that all storage allocated in decode_line_1 gets freed - in case the following errors out. */ - old_chain = make_cleanup (xfree, sals.sals); - if (canonical != (char **) NULL) - { - make_cleanup (xfree, canonical); - canonical_strings_chain = make_cleanup (null_cleanup, 0); - if (canonical[0] != NULL) - make_cleanup (xfree, canonical[0]); - } - - resolve_sal_pc (&sals.sals[0]); - - /* Remove the canonical strings from the cleanup, they are needed below. */ - if (canonical != (char **) NULL) - discard_cleanups (canonical_strings_chain); - - b = set_raw_breakpoint (sals.sals[0], bp_kind); - set_breakpoint_count (breakpoint_count + 1); - b->number = breakpoint_count; - b->cond = NULL; - b->cond_string = (cond_string == NULL) ? - NULL : savestring (cond_string, strlen (cond_string)); - b->thread = thread; - - if (canonical != (char **) NULL && canonical[0] != NULL) - b->addr_string = canonical[0]; - else if (addr_start) - b->addr_string = savestring (addr_start, addr_end - addr_start); - - b->enable_state = bp_enabled; - b->disposition = tempflag ? disp_del : disp_donttouch; - - if (dll_pathname == NULL) - b->dll_pathname = NULL; - else - { - b->dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1); - strcpy (b->dll_pathname, dll_pathname); - } - - mention (b); - do_cleanups (old_chain); -} - -void -create_solib_load_event_breakpoint (char *hookname, int tempflag, - char *dll_pathname, char *cond_string) -{ - solib_load_unload_1 (hookname, tempflag, dll_pathname, - cond_string, bp_catch_load); -} - -void -create_solib_unload_event_breakpoint (char *hookname, int tempflag, - char *dll_pathname, char *cond_string) -{ - solib_load_unload_1 (hookname,tempflag, dll_pathname, - cond_string, bp_catch_unload); -} - -static void -create_fork_vfork_event_catchpoint (int tempflag, char *cond_string, - enum bptype bp_kind) -{ - struct symtab_and_line sal; - struct breakpoint *b; - int thread = -1; /* All threads. */ - - INIT_SAL (&sal); - sal.pc = 0; - sal.symtab = NULL; - sal.line = 0; - - b = set_raw_breakpoint (sal, bp_kind); - set_breakpoint_count (breakpoint_count + 1); - b->number = breakpoint_count; - b->cond = NULL; - b->cond_string = (cond_string == NULL) ? - NULL : savestring (cond_string, strlen (cond_string)); - b->thread = thread; - b->addr_string = NULL; - b->enable_state = bp_enabled; - b->disposition = tempflag ? disp_del : disp_donttouch; - b->forked_inferior_pid = 0; - - mention (b); -} - -void -create_fork_event_catchpoint (int tempflag, char *cond_string) -{ - create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork); -} - -void -create_vfork_event_catchpoint (int tempflag, char *cond_string) -{ - create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork); -} - -void -create_exec_event_catchpoint (int tempflag, char *cond_string) -{ - struct symtab_and_line sal; - struct breakpoint *b; - int thread = -1; /* All threads. */ - - INIT_SAL (&sal); - sal.pc = 0; - sal.symtab = NULL; - sal.line = 0; - - b = set_raw_breakpoint (sal, bp_catch_exec); - set_breakpoint_count (breakpoint_count + 1); - b->number = breakpoint_count; - b->cond = NULL; - b->cond_string = (cond_string == NULL) ? - NULL : savestring (cond_string, strlen (cond_string)); - b->thread = thread; - b->addr_string = NULL; - b->enable_state = bp_enabled; - b->disposition = tempflag ? disp_del : disp_donttouch; - - mention (b); -} - -static int -hw_breakpoint_used_count (void) -{ - register struct breakpoint *b; - int i = 0; - - ALL_BREAKPOINTS (b) - { - if (b->type == bp_hardware_breakpoint && b->enable_state == bp_enabled) - i++; - } - - return i; -} - -static int -hw_watchpoint_used_count (enum bptype type, int *other_type_used) -{ - register struct breakpoint *b; - int i = 0; - - *other_type_used = 0; - ALL_BREAKPOINTS (b) - { - if (b->enable_state == bp_enabled) - { - if (b->type == type) - i++; - else if ((b->type == bp_hardware_watchpoint || - b->type == bp_read_watchpoint || - b->type == bp_access_watchpoint) - && b->enable_state == bp_enabled) - *other_type_used = 1; - } - } - return i; -} - -/* Call this after hitting the longjmp() breakpoint. Use this to set - a new breakpoint at the target of the jmp_buf. - - FIXME - This ought to be done by setting a temporary breakpoint - that gets deleted automatically... */ - -void -set_longjmp_resume_breakpoint (CORE_ADDR pc, struct frame_info *frame) -{ - register struct breakpoint *b; - - ALL_BREAKPOINTS (b) - if (b->type == bp_longjmp_resume) - { - b->address = pc; - b->enable_state = bp_enabled; - if (frame != NULL) - b->frame = frame->frame; - else - b->frame = 0; - check_duplicates (b); - return; - } -} - -void -disable_watchpoints_before_interactive_call_start (void) -{ - struct breakpoint *b; - - ALL_BREAKPOINTS (b) - { - if (((b->type == bp_watchpoint) - || (b->type == bp_hardware_watchpoint) - || (b->type == bp_read_watchpoint) - || (b->type == bp_access_watchpoint) - || ep_is_exception_catchpoint (b)) - && (b->enable_state == bp_enabled)) - { - b->enable_state = bp_call_disabled; - check_duplicates (b); - } - } -} - -void -enable_watchpoints_after_interactive_call_stop (void) -{ - struct breakpoint *b; - - ALL_BREAKPOINTS (b) - { - if (((b->type == bp_watchpoint) - || (b->type == bp_hardware_watchpoint) - || (b->type == bp_read_watchpoint) - || (b->type == bp_access_watchpoint) - || ep_is_exception_catchpoint (b)) - && (b->enable_state == bp_call_disabled)) - { - b->enable_state = bp_enabled; - check_duplicates (b); - } - } -} - - -/* Set a breakpoint that will evaporate an end of command - at address specified by SAL. - Restrict it to frame FRAME if FRAME is nonzero. */ - -struct breakpoint * -set_momentary_breakpoint (struct symtab_and_line sal, struct frame_info *frame, - enum bptype type) -{ - register struct breakpoint *b; - b = set_raw_breakpoint (sal, type); - b->enable_state = bp_enabled; - b->disposition = disp_donttouch; - b->frame = (frame ? frame->frame : 0); - - /* If we're debugging a multi-threaded program, then we - want momentary breakpoints to be active in only a - single thread of control. */ - if (in_thread_list (inferior_ptid)) - b->thread = pid_to_thread_id (inferior_ptid); - - return b; -} - - -/* Tell the user we have just set a breakpoint B. */ - -static void -mention (struct breakpoint *b) -{ - int say_where = 0; - struct cleanup *old_chain; - struct ui_stream *stb; - - stb = ui_out_stream_new (uiout); - old_chain = make_cleanup_ui_out_stream_delete (stb); - - /* FIXME: This is misplaced; mention() is called by things (like hitting a - watchpoint) other than breakpoint creation. It should be possible to - clean this up and at the same time replace the random calls to - breakpoint_changed with this hook, as has already been done for - delete_breakpoint_hook and so on. */ - if (create_breakpoint_hook) - create_breakpoint_hook (b); - breakpoint_create_event (b->number); - - switch (b->type) - { - case bp_none: - printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number); - break; - case bp_watchpoint: - ui_out_text (uiout, "Watchpoint "); - ui_out_tuple_begin (uiout, "wpt"); - ui_out_field_int (uiout, "number", b->number); - ui_out_text (uiout, ": "); - print_expression (b->exp, stb->stream); - ui_out_field_stream (uiout, "exp", stb); - ui_out_tuple_end (uiout); - break; - case bp_hardware_watchpoint: - ui_out_text (uiout, "Hardware watchpoint "); - ui_out_tuple_begin (uiout, "wpt"); - ui_out_field_int (uiout, "number", b->number); - ui_out_text (uiout, ": "); - print_expression (b->exp, stb->stream); - ui_out_field_stream (uiout, "exp", stb); - ui_out_tuple_end (uiout); - break; - case bp_read_watchpoint: - ui_out_text (uiout, "Hardware read watchpoint "); - ui_out_tuple_begin (uiout, "hw-rwpt"); - ui_out_field_int (uiout, "number", b->number); - ui_out_text (uiout, ": "); - print_expression (b->exp, stb->stream); - ui_out_field_stream (uiout, "exp", stb); - ui_out_tuple_end (uiout); - break; - case bp_access_watchpoint: - ui_out_text (uiout, "Hardware access (read/write) watchpoint "); - ui_out_tuple_begin (uiout, "hw-awpt"); - ui_out_field_int (uiout, "number", b->number); - ui_out_text (uiout, ": "); - print_expression (b->exp, stb->stream); - ui_out_field_stream (uiout, "exp", stb); - ui_out_tuple_end (uiout); - break; - case bp_breakpoint: - if (ui_out_is_mi_like_p (uiout)) - { - say_where = 0; - break; - } - printf_filtered ("Breakpoint %d", b->number); - say_where = 1; - break; - case bp_hardware_breakpoint: - if (ui_out_is_mi_like_p (uiout)) - { - say_where = 0; - break; - } - printf_filtered ("Hardware assisted breakpoint %d", b->number); - say_where = 1; - break; - case bp_catch_load: - case bp_catch_unload: - printf_filtered ("Catchpoint %d (%s %s)", - b->number, - (b->type == bp_catch_load) ? "load" : "unload", - (b->dll_pathname != NULL) ? - b->dll_pathname : "<any library>"); - break; - case bp_catch_fork: - case bp_catch_vfork: - printf_filtered ("Catchpoint %d (%s)", - b->number, - (b->type == bp_catch_fork) ? "fork" : "vfork"); - break; - case bp_catch_exec: - printf_filtered ("Catchpoint %d (exec)", - b->number); - break; - case bp_catch_catch: - case bp_catch_throw: - printf_filtered ("Catchpoint %d (%s)", - b->number, - (b->type == bp_catch_catch) ? "catch" : "throw"); - break; - - case bp_until: - case bp_finish: - case bp_longjmp: - case bp_longjmp_resume: - case bp_step_resume: - case bp_through_sigtramp: - case bp_call_dummy: - case bp_watchpoint_scope: - case bp_shlib_event: - case bp_thread_event: - case bp_overlay_event: - break; - } - if (say_where) - { - if (addressprint || b->source_file == NULL) - { - printf_filtered (" at "); - print_address_numeric (b->address, 1, gdb_stdout); - } - if (b->source_file) - printf_filtered (": file %s, line %d.", - b->source_file, b->line_number); - } - do_cleanups (old_chain); - if (ui_out_is_mi_like_p (uiout)) - return; - printf_filtered ("\n"); -} - - -/* Add SALS.nelts breakpoints to the breakpoint table. For each - SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i], - COND[i] and COND_STRING[i] values. - - NOTE: If the function succeeds, the caller is expected to cleanup - the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the - array contents). If the function fails (error() is called), the - caller is expected to cleanups both the ADDR_STRING, COND_STRING, - COND and SALS arrays and each of those arrays contents. */ - -static void -create_breakpoints (struct symtabs_and_lines sals, char **addr_string, - struct expression **cond, char **cond_string, - enum bptype type, enum bpdisp disposition, - int thread, int ignore_count, int from_tty) -{ - if (type == bp_hardware_breakpoint) - { - int i = hw_breakpoint_used_count (); - int target_resources_ok = - TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint, - i + sals.nelts, 0); - if (target_resources_ok == 0) - error ("No hardware breakpoint support in the target."); - else if (target_resources_ok < 0) - error ("Hardware breakpoints used exceeds limit."); - } - - /* Now set all the breakpoints. */ - { - int i; - for (i = 0; i < sals.nelts; i++) - { - struct breakpoint *b; - struct symtab_and_line sal = sals.sals[i]; - - if (from_tty) - describe_other_breakpoints (sal.pc, sal.section); - - b = set_raw_breakpoint (sal, type); - set_breakpoint_count (breakpoint_count + 1); - b->number = breakpoint_count; - b->cond = cond[i]; - b->thread = thread; - b->addr_string = addr_string[i]; - b->cond_string = cond_string[i]; - b->ignore_count = ignore_count; - b->enable_state = bp_enabled; - b->disposition = disposition; - mention (b); - } - } -} - -/* Parse ARG which is assumed to be a SAL specification possibly - followed by conditionals. On return, SALS contains an array of SAL - addresses found. ADDR_STRING contains a vector of (canonical) - address strings. ARG points to the end of the SAL. */ - -void -parse_breakpoint_sals (char **address, - struct symtabs_and_lines *sals, - char ***addr_string) -{ - char *addr_start = *address; - *addr_string = NULL; - /* If no arg given, or if first arg is 'if ', use the default - breakpoint. */ - if ((*address) == NULL - || (strncmp ((*address), "if", 2) == 0 && isspace ((*address)[2]))) - { - if (default_breakpoint_valid) - { - struct symtab_and_line sal; - INIT_SAL (&sal); /* initialize to zeroes */ - sals->sals = (struct symtab_and_line *) - xmalloc (sizeof (struct symtab_and_line)); - sal.pc = default_breakpoint_address; - sal.line = default_breakpoint_line; - sal.symtab = default_breakpoint_symtab; - sal.section = find_pc_overlay (sal.pc); - sals->sals[0] = sal; - sals->nelts = 1; - } - else - error ("No default breakpoint address now."); - } - else - { - /* Force almost all breakpoints to be in terms of the - current_source_symtab (which is decode_line_1's default). This - should produce the results we want almost all of the time while - leaving default_breakpoint_* alone. */ - if (default_breakpoint_valid - && (!current_source_symtab - || (strchr ("+-", (*address)[0]) != NULL))) - *sals = decode_line_1 (address, 1, default_breakpoint_symtab, - default_breakpoint_line, addr_string); - else - *sals = decode_line_1 (address, 1, (struct symtab *) NULL, 0, addr_string); - } - /* For any SAL that didn't have a canonical string, fill one in. */ - if (sals->nelts > 0 && *addr_string == NULL) - *addr_string = xcalloc (sals->nelts, sizeof (char **)); - if (addr_start != (*address)) - { - int i; - for (i = 0; i < sals->nelts; i++) - { - /* Add the string if not present. */ - if ((*addr_string)[i] == NULL) - (*addr_string)[i] = savestring (addr_start, (*address) - addr_start); - } - } -} - - -/* Convert each SAL into a real PC. Verify that the PC can be - inserted as a breakpoint. If it can't throw an error. */ - -void -breakpoint_sals_to_pc (struct symtabs_and_lines *sals, - char *address) -{ - int i; - for (i = 0; i < sals->nelts; i++) - { - resolve_sal_pc (&sals->sals[i]); - - /* It's possible for the PC to be nonzero, but still an illegal - value on some targets. - - For example, on HP-UX if you start gdb, and before running the - inferior you try to set a breakpoint on a shared library function - "foo" where the inferior doesn't call "foo" directly but does - pass its address to another function call, then we do find a - minimal symbol for the "foo", but it's address is invalid. - (Appears to be an index into a table that the loader sets up - when the inferior is run.) - - Give the target a chance to bless sals.sals[i].pc before we - try to make a breakpoint for it. */ - if (PC_REQUIRES_RUN_BEFORE_USE (sals->sals[i].pc)) - { - if (address == NULL) - error ("Cannot break without a running program."); - else - error ("Cannot break on %s without a running program.", - address); - } - } -} - -/* Set a breakpoint according to ARG (function, linenum or *address) - flag: first bit : 0 non-temporary, 1 temporary. - second bit : 0 normal breakpoint, 1 hardware breakpoint. */ - -static void -break_command_1 (char *arg, int flag, int from_tty) -{ - int tempflag, hardwareflag; - struct symtabs_and_lines sals; - register struct expression **cond = 0; - /* Pointers in arg to the start, and one past the end, of the - condition. */ - char **cond_string = (char **) NULL; - char *addr_start = arg; - char **addr_string; - struct cleanup *old_chain; - struct cleanup *breakpoint_chain = NULL; - int i; - int thread = -1; - int ignore_count = 0; - - hardwareflag = flag & BP_HARDWAREFLAG; - tempflag = flag & BP_TEMPFLAG; - - sals.sals = NULL; - sals.nelts = 0; - addr_string = NULL; - parse_breakpoint_sals (&arg, &sals, &addr_string); - - if (!sals.nelts) - return; - - /* Create a chain of things that always need to be cleaned up. */ - old_chain = make_cleanup (null_cleanup, 0); - - /* Make sure that all storage allocated to SALS gets freed. */ - make_cleanup (xfree, sals.sals); - - /* Cleanup the addr_string array but not its contents. */ - make_cleanup (xfree, addr_string); - - /* Allocate space for all the cond expressions. */ - cond = xcalloc (sals.nelts, sizeof (struct expression *)); - make_cleanup (xfree, cond); - - /* Allocate space for all the cond strings. */ - cond_string = xcalloc (sals.nelts, sizeof (char **)); - make_cleanup (xfree, cond_string); - - /* ----------------------------- SNIP ----------------------------- - Anything added to the cleanup chain beyond this point is assumed - to be part of a breakpoint. If the breakpoint create succeeds - then the memory is not reclaimed. */ - breakpoint_chain = make_cleanup (null_cleanup, 0); - - /* Mark the contents of the addr_string for cleanup. These go on - the breakpoint_chain and only occure if the breakpoint create - fails. */ - for (i = 0; i < sals.nelts; i++) - { - if (addr_string[i] != NULL) - make_cleanup (xfree, addr_string[i]); - } - - /* Resolve all line numbers to PC's and verify that the addresses - are ok for the target. */ - breakpoint_sals_to_pc (&sals, addr_start); - - /* Verify that condition can be parsed, before setting any - breakpoints. Allocate a separate condition expression for each - breakpoint. */ - thread = -1; /* No specific thread yet */ - for (i = 0; i < sals.nelts; i++) - { - char *tok = arg; - while (tok && *tok) - { - char *end_tok; - int toklen; - char *cond_start = NULL; - char *cond_end = NULL; - while (*tok == ' ' || *tok == '\t') - tok++; - - end_tok = tok; - - while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000') - end_tok++; - - toklen = end_tok - tok; - - if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) - { - tok = cond_start = end_tok + 1; - cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0); - make_cleanup (xfree, cond[i]); - cond_end = tok; - cond_string[i] = savestring (cond_start, cond_end - cond_start); - make_cleanup (xfree, cond_string[i]); - } - else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0) - { - char *tmptok; - - tok = end_tok + 1; - tmptok = tok; - thread = strtol (tok, &tok, 0); - if (tok == tmptok) - error ("Junk after thread keyword."); - if (!valid_thread_id (thread)) - error ("Unknown thread %d\n", thread); - } - else - error ("Junk at end of arguments."); - } - } - - create_breakpoints (sals, addr_string, cond, cond_string, - hardwareflag ? bp_hardware_breakpoint : bp_breakpoint, - tempflag ? disp_del : disp_donttouch, - thread, ignore_count, from_tty); - - if (sals.nelts > 1) - { - warning ("Multiple breakpoints were set."); - warning ("Use the \"delete\" command to delete unwanted breakpoints."); - } - /* That's it. Discard the cleanups for data inserted into the - breakpoint. */ - discard_cleanups (breakpoint_chain); - /* But cleanup everything else. */ - do_cleanups (old_chain); -} - -/* Set a breakpoint of TYPE/DISPOSITION according to ARG (function, - linenum or *address) with COND and IGNORE_COUNT. */ - -struct captured_breakpoint_args - { - char *address; - char *condition; - int hardwareflag; - int tempflag; - int thread; - int ignore_count; - }; - -static int -do_captured_breakpoint (void *data) -{ - struct captured_breakpoint_args *args = data; - struct symtabs_and_lines sals; - register struct expression **cond; - struct cleanup *old_chain; - struct cleanup *breakpoint_chain = NULL; - int i; - char **addr_string; - char **cond_string; - - char *address_end; - - /* Parse the source and lines spec. Delay check that the expression - didn't contain trailing garbage until after cleanups are in - place. */ - sals.sals = NULL; - sals.nelts = 0; - address_end = args->address; - addr_string = NULL; - parse_breakpoint_sals (&address_end, &sals, &addr_string); - - if (!sals.nelts) - return GDB_RC_NONE; - - /* Create a chain of things at always need to be cleaned up. */ - old_chain = make_cleanup (null_cleanup, 0); - - /* Always have a addr_string array, even if it is empty. */ - make_cleanup (xfree, addr_string); - - /* Make sure that all storage allocated to SALS gets freed. */ - make_cleanup (xfree, sals.sals); - - /* Allocate space for all the cond expressions. */ - cond = xcalloc (sals.nelts, sizeof (struct expression *)); - make_cleanup (xfree, cond); - - /* Allocate space for all the cond strings. */ - cond_string = xcalloc (sals.nelts, sizeof (char **)); - make_cleanup (xfree, cond_string); - - /* ----------------------------- SNIP ----------------------------- - Anything added to the cleanup chain beyond this point is assumed - to be part of a breakpoint. If the breakpoint create goes - through then that memory is not cleaned up. */ - breakpoint_chain = make_cleanup (null_cleanup, 0); - - /* Mark the contents of the addr_string for cleanup. These go on - the breakpoint_chain and only occure if the breakpoint create - fails. */ - for (i = 0; i < sals.nelts; i++) - { - if (addr_string[i] != NULL) - make_cleanup (xfree, addr_string[i]); - } - - /* Wait until now before checking for garbage at the end of the - address. That way cleanups can take care of freeing any - memory. */ - if (*address_end != '\0') - error ("Garbage %s following breakpoint address", address_end); - - /* Resolve all line numbers to PC's. */ - breakpoint_sals_to_pc (&sals, args->address); - - /* Verify that conditions can be parsed, before setting any - breakpoints. */ - for (i = 0; i < sals.nelts; i++) - { - if (args->condition != NULL) - { - char *tok = args->condition; - cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0); - if (*tok != '\0') - error ("Garbage %s follows condition", tok); - make_cleanup (xfree, cond[i]); - cond_string[i] = xstrdup (args->condition); - } - } - - create_breakpoints (sals, addr_string, cond, cond_string, - args->hardwareflag ? bp_hardware_breakpoint : bp_breakpoint, - args->tempflag ? disp_del : disp_donttouch, - args->thread, args->ignore_count, 0/*from-tty*/); - - /* That's it. Discard the cleanups for data inserted into the - breakpoint. */ - discard_cleanups (breakpoint_chain); - /* But cleanup everything else. */ - do_cleanups (old_chain); - return GDB_RC_OK; -} - -enum gdb_rc -gdb_breakpoint (char *address, char *condition, - int hardwareflag, int tempflag, - int thread, int ignore_count) -{ - struct captured_breakpoint_args args; - args.address = address; - args.condition = condition; - args.hardwareflag = hardwareflag; - args.tempflag = tempflag; - args.thread = thread; - args.ignore_count = ignore_count; - return catch_errors (do_captured_breakpoint, &args, - NULL, RETURN_MASK_ALL); -} - - -static void -break_at_finish_at_depth_command_1 (char *arg, int flag, int from_tty) -{ - struct frame_info *frame; - CORE_ADDR low, high, selected_pc = 0; - char *extra_args = NULL; - char *level_arg; - char *addr_string; - int extra_args_len = 0, if_arg = 0; - - if (!arg || - (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t'))) - { - - if (default_breakpoint_valid) - { - if (selected_frame) - { - selected_pc = selected_frame->pc; - if (arg) - if_arg = 1; - } - else - error ("No selected frame."); - } - else - error ("No default breakpoint address now."); - } - else - { - extra_args = strchr (arg, ' '); - if (extra_args) - { - extra_args++; - extra_args_len = strlen (extra_args); - level_arg = (char *) xmalloc (extra_args - arg); - strncpy (level_arg, arg, extra_args - arg - 1); - level_arg[extra_args - arg - 1] = '\0'; - } - else - { - level_arg = (char *) xmalloc (strlen (arg) + 1); - strcpy (level_arg, arg); - } - - frame = parse_frame_specification (level_arg); - if (frame) - selected_pc = frame->pc; - else - selected_pc = 0; - } - if (if_arg) - { - extra_args = arg; - extra_args_len = strlen (arg); - } - - if (selected_pc) - { - if (find_pc_partial_function (selected_pc, (char **) NULL, &low, &high)) - { - addr_string = (char *) xmalloc (26 + extra_args_len); - if (extra_args_len) - sprintf (addr_string, "*0x%s %s", paddr_nz (high), extra_args); - else - sprintf (addr_string, "*0x%s", paddr_nz (high)); - break_command_1 (addr_string, flag, from_tty); - xfree (addr_string); - } - else - error ("No function contains the specified address"); - } - else - error ("Unable to set breakpoint at procedure exit"); -} - - -static void -break_at_finish_command_1 (char *arg, int flag, int from_tty) -{ - char *addr_string, *break_string, *beg_addr_string; - CORE_ADDR low, high; - struct symtabs_and_lines sals; - struct symtab_and_line sal; - struct cleanup *old_chain; - char *extra_args = NULL; - int extra_args_len = 0; - int i, if_arg = 0; - - if (!arg || - (arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t'))) - { - if (default_breakpoint_valid) - { - if (selected_frame) - { - addr_string = (char *) xmalloc (15); - sprintf (addr_string, "*0x%s", paddr_nz (selected_frame->pc)); - if (arg) - if_arg = 1; - } - else - error ("No selected frame."); - } - else - error ("No default breakpoint address now."); - } - else - { - addr_string = (char *) xmalloc (strlen (arg) + 1); - strcpy (addr_string, arg); - } - - if (if_arg) - { - extra_args = arg; - extra_args_len = strlen (arg); - } - else if (arg) - { - /* get the stuff after the function name or address */ - extra_args = strchr (arg, ' '); - if (extra_args) - { - extra_args++; - extra_args_len = strlen (extra_args); - } - } - - sals.sals = NULL; - sals.nelts = 0; - - beg_addr_string = addr_string; - sals = decode_line_1 (&addr_string, 1, (struct symtab *) NULL, 0, - (char ***) NULL); - - xfree (beg_addr_string); - old_chain = make_cleanup (xfree, sals.sals); - for (i = 0; (i < sals.nelts); i++) - { - sal = sals.sals[i]; - if (find_pc_partial_function (sal.pc, (char **) NULL, &low, &high)) - { - break_string = (char *) xmalloc (extra_args_len + 26); - if (extra_args_len) - sprintf (break_string, "*0x%s %s", paddr_nz (high), extra_args); - else - sprintf (break_string, "*0x%s", paddr_nz (high)); - break_command_1 (break_string, flag, from_tty); - xfree (break_string); - } - else - error ("No function contains the specified address"); - } - if (sals.nelts > 1) - { - warning ("Multiple breakpoints were set.\n"); - warning ("Use the \"delete\" command to delete unwanted breakpoints."); - } - do_cleanups (old_chain); -} - - -/* Helper function for break_command_1 and disassemble_command. */ - -void -resolve_sal_pc (struct symtab_and_line *sal) -{ - CORE_ADDR pc; - - if (sal->pc == 0 && sal->symtab != NULL) - { - if (!find_line_pc (sal->symtab, sal->line, &pc)) - error ("No line %d in file \"%s\".", - sal->line, sal->symtab->filename); - sal->pc = pc; - } - - if (sal->section == 0 && sal->symtab != NULL) - { - struct blockvector *bv; - struct block *b; - struct symbol *sym; - int index; - - bv = blockvector_for_pc_sect (sal->pc, 0, &index, sal->symtab); - if (bv != NULL) - { - b = BLOCKVECTOR_BLOCK (bv, index); - sym = block_function (b); - if (sym != NULL) - { - fixup_symbol_section (sym, sal->symtab->objfile); - sal->section = SYMBOL_BFD_SECTION (sym); - } - else - { - /* It really is worthwhile to have the section, so we'll just - have to look harder. This case can be executed if we have - line numbers but no functions (as can happen in assembly - source). */ - - struct minimal_symbol *msym; - - msym = lookup_minimal_symbol_by_pc (sal->pc); - if (msym) - sal->section = SYMBOL_BFD_SECTION (msym); - } - } - } -} - -void -break_command (char *arg, int from_tty) -{ - break_command_1 (arg, 0, from_tty); -} - -void -break_at_finish_command (char *arg, int from_tty) -{ - break_at_finish_command_1 (arg, 0, from_tty); -} - -void -break_at_finish_at_depth_command (char *arg, int from_tty) -{ - break_at_finish_at_depth_command_1 (arg, 0, from_tty); -} - -void -tbreak_command (char *arg, int from_tty) -{ - break_command_1 (arg, BP_TEMPFLAG, from_tty); -} - -void -tbreak_at_finish_command (char *arg, int from_tty) -{ - break_at_finish_command_1 (arg, BP_TEMPFLAG, from_tty); -} - -static void -hbreak_command (char *arg, int from_tty) -{ - break_command_1 (arg, BP_HARDWAREFLAG, from_tty); -} - -static void -thbreak_command (char *arg, int from_tty) -{ - break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty); -} - -static void -stop_command (char *arg, int from_tty) -{ - printf_filtered ("Specify the type of breakpoint to set.\n\ -Usage: stop in <function | address>\n\ - stop at <line>\n"); -} - -static void -stopin_command (char *arg, int from_tty) -{ - int badInput = 0; - - if (arg == (char *) NULL) - badInput = 1; - else if (*arg != '*') - { - char *argptr = arg; - int hasColon = 0; - - /* look for a ':'. If this is a line number specification, then - say it is bad, otherwise, it should be an address or - function/method name */ - while (*argptr && !hasColon) - { - hasColon = (*argptr == ':'); - argptr++; - } - - if (hasColon) - badInput = (*argptr != ':'); /* Not a class::method */ - else - badInput = isdigit (*arg); /* a simple line number */ - } - - if (badInput) - printf_filtered ("Usage: stop in <function | address>\n"); - else - break_command_1 (arg, 0, from_tty); -} - -static void -stopat_command (char *arg, int from_tty) -{ - int badInput = 0; - - if (arg == (char *) NULL || *arg == '*') /* no line number */ - badInput = 1; - else - { - char *argptr = arg; - int hasColon = 0; - - /* look for a ':'. If there is a '::' then get out, otherwise - it is probably a line number. */ - while (*argptr && !hasColon) - { - hasColon = (*argptr == ':'); - argptr++; - } - - if (hasColon) - badInput = (*argptr == ':'); /* we have class::method */ - else - badInput = !isdigit (*arg); /* not a line number */ - } - - if (badInput) - printf_filtered ("Usage: stop at <line>\n"); - else - break_command_1 (arg, 0, from_tty); -} - -/* ARGSUSED */ -/* accessflag: hw_write: watch write, - hw_read: watch read, - hw_access: watch access (read or write) */ -static void -watch_command_1 (char *arg, int accessflag, int from_tty) -{ - struct breakpoint *b; - struct symtab_and_line sal; - struct expression *exp; - struct block *exp_valid_block; - struct value *val, *mark; - struct frame_info *frame; - struct frame_info *prev_frame = NULL; - char *exp_start = NULL; - char *exp_end = NULL; - char *tok, *end_tok; - int toklen; - char *cond_start = NULL; - char *cond_end = NULL; - struct expression *cond = NULL; - int i, other_type_used, target_resources_ok = 0; - enum bptype bp_type; - int mem_cnt = 0; - - INIT_SAL (&sal); /* initialize to zeroes */ - - /* Parse arguments. */ - innermost_block = NULL; - exp_start = arg; - exp = parse_exp_1 (&arg, 0, 0); - exp_end = arg; - exp_valid_block = innermost_block; - mark = value_mark (); - val = evaluate_expression (exp); - release_value (val); - if (VALUE_LAZY (val)) - value_fetch_lazy (val); - - tok = arg; - while (*tok == ' ' || *tok == '\t') - tok++; - end_tok = tok; - - while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000') - end_tok++; - - toklen = end_tok - tok; - if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) - { - tok = cond_start = end_tok + 1; - cond = parse_exp_1 (&tok, 0, 0); - cond_end = tok; - } - if (*tok) - error ("Junk at end of command."); - - if (accessflag == hw_read) - bp_type = bp_read_watchpoint; - else if (accessflag == hw_access) - bp_type = bp_access_watchpoint; - else - bp_type = bp_hardware_watchpoint; - - mem_cnt = can_use_hardware_watchpoint (val); - if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint) - error ("Expression cannot be implemented with read/access watchpoint."); - if (mem_cnt != 0) - { - i = hw_watchpoint_used_count (bp_type, &other_type_used); - target_resources_ok = - TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type, i + mem_cnt, - other_type_used); - if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint) - error ("Target does not support this type of hardware watchpoint."); - - if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint) - error ("Target can only support one kind of HW watchpoint at a time."); - } - -#if defined(HPUXHPPA) - /* On HP-UX if you set a h/w - watchpoint before the "run" command, the inferior dies with a e.g., - SIGILL once you start it. I initially believed this was due to a - bad interaction between page protection traps and the initial - startup sequence by the dynamic linker. - - However, I tried avoiding that by having HP-UX's implementation of - TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid - yet, which forced slow watches before a "run" or "attach", and it - still fails somewhere in the startup code. - - Until I figure out what's happening, I'm disallowing watches altogether - before the "run" or "attach" command. We'll tell the user they must - set watches after getting the program started. */ - if (!target_has_execution) - { - warning ("can't do that without a running program; try \"break main\", \"run\" first"); - return; - } -#endif /* HPUXHPPA */ - - /* Change the type of breakpoint to an ordinary watchpoint if a hardware - watchpoint could not be set. */ - if (!mem_cnt || target_resources_ok <= 0) - bp_type = bp_watchpoint; - - /* Now set up the breakpoint. */ - b = set_raw_breakpoint (sal, bp_type); - set_breakpoint_count (breakpoint_count + 1); - b->number = breakpoint_count; - b->disposition = disp_donttouch; - b->exp = exp; - b->exp_valid_block = exp_valid_block; - b->exp_string = savestring (exp_start, exp_end - exp_start); - b->val = val; - b->cond = cond; - if (cond_start) - b->cond_string = savestring (cond_start, cond_end - cond_start); - else - b->cond_string = 0; - - frame = block_innermost_frame (exp_valid_block); - if (frame) - { - prev_frame = get_prev_frame (frame); - get_frame_id (frame, &b->watchpoint_frame); - } - else - { - memset (&b->watchpoint_frame, 0, sizeof (b->watchpoint_frame)); - } - - /* If the expression is "local", then set up a "watchpoint scope" - breakpoint at the point where we've left the scope of the watchpoint - expression. */ - if (innermost_block) - { - if (prev_frame) - { - struct breakpoint *scope_breakpoint; - scope_breakpoint = create_internal_breakpoint (get_frame_pc (prev_frame), - bp_watchpoint_scope); - - scope_breakpoint->enable_state = bp_enabled; - - /* Automatically delete the breakpoint when it hits. */ - scope_breakpoint->disposition = disp_del; - - /* Only break in the proper frame (help with recursion). */ - scope_breakpoint->frame = prev_frame->frame; - - /* Set the address at which we will stop. */ - scope_breakpoint->address = get_frame_pc (prev_frame); - - /* The scope breakpoint is related to the watchpoint. We - will need to act on them together. */ - b->related_breakpoint = scope_breakpoint; - } - } - value_free_to_mark (mark); - mention (b); -} - -/* Return count of locations need to be watched and can be handled - in hardware. If the watchpoint can not be handled - in hardware return zero. */ - -#if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT) -#define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \ - ((BYTE_SIZE) <= (REGISTER_SIZE)) -#endif - -#if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT) -#define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \ - (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN)) -#endif - -static int -can_use_hardware_watchpoint (struct value *v) -{ - int found_memory_cnt = 0; - struct value *head = v; - - /* Did the user specifically forbid us to use hardware watchpoints? */ - if (!can_use_hw_watchpoints) - return 0; - - /* Make sure that the value of the expression depends only upon - memory contents, and values computed from them within GDB. If we - find any register references or function calls, we can't use a - hardware watchpoint. - - The idea here is that evaluating an expression generates a series - of values, one holding the value of every subexpression. (The - expression a*b+c has five subexpressions: a, b, a*b, c, and - a*b+c.) GDB's values hold almost enough information to establish - the criteria given above --- they identify memory lvalues, - register lvalues, computed values, etcetera. So we can evaluate - the expression, and then scan the chain of values that leaves - behind to decide whether we can detect any possible change to the - expression's final value using only hardware watchpoints. - - However, I don't think that the values returned by inferior - function calls are special in any way. So this function may not - notice that an expression involving an inferior function call - can't be watched with hardware watchpoints. FIXME. */ - for (; v; v = v->next) - { - if (VALUE_LVAL (v) == lval_memory) - { - if (VALUE_LAZY (v)) - /* A lazy memory lvalue is one that GDB never needed to fetch; - we either just used its address (e.g., `a' in `a.b') or - we never needed it at all (e.g., `a' in `a,b'). */ - ; - else - { - /* Ahh, memory we actually used! Check if we can cover - it with hardware watchpoints. */ - struct type *vtype = check_typedef (VALUE_TYPE (v)); - - /* We only watch structs and arrays if user asked for it - explicitly, never if they just happen to appear in a - middle of some value chain. */ - if (v == head - || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT - && TYPE_CODE (vtype) != TYPE_CODE_ARRAY)) - { - CORE_ADDR vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); - int len = TYPE_LENGTH (VALUE_TYPE (v)); - - if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr, len)) - return 0; - else - found_memory_cnt++; - } - } - } - else if (v->lval != not_lval && v->modifiable == 0) - return 0; /* ??? What does this represent? */ - else if (v->lval == lval_register) - return 0; /* cannot watch a register with a HW watchpoint */ - } - - /* The expression itself looks suitable for using a hardware - watchpoint, but give the target machine a chance to reject it. */ - return found_memory_cnt; -} - -void -watch_command_wrapper (char *arg, int from_tty) -{ - watch_command (arg, from_tty); -} - -static void -watch_command (char *arg, int from_tty) -{ - watch_command_1 (arg, hw_write, from_tty); -} - -void -rwatch_command_wrapper (char *arg, int from_tty) -{ - rwatch_command (arg, from_tty); -} - -static void -rwatch_command (char *arg, int from_tty) -{ - watch_command_1 (arg, hw_read, from_tty); -} - -void -awatch_command_wrapper (char *arg, int from_tty) -{ - awatch_command (arg, from_tty); -} - -static void -awatch_command (char *arg, int from_tty) -{ - watch_command_1 (arg, hw_access, from_tty); -} - - -/* Helper routines for the until_command routine in infcmd.c. Here - because it uses the mechanisms of breakpoints. */ - -/* This function is called by fetch_inferior_event via the - cmd_continuation pointer, to complete the until command. It takes - care of cleaning up the temporary breakpoints set up by the until - command. */ -static void -until_break_command_continuation (struct continuation_arg *arg) -{ - struct cleanup *cleanups; - - cleanups = (struct cleanup *) arg->data.pointer; - do_exec_cleanups (cleanups); -} - -/* ARGSUSED */ -void -until_break_command (char *arg, int from_tty) -{ - struct symtabs_and_lines sals; - struct symtab_and_line sal; - struct frame_info *prev_frame = get_prev_frame (selected_frame); - struct breakpoint *breakpoint; - struct cleanup *old_chain; - struct continuation_arg *arg1; - - - clear_proceed_status (); - - /* Set a breakpoint where the user wants it and at return from - this function */ - - if (default_breakpoint_valid) - sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, - default_breakpoint_line, (char ***) NULL); - else - sals = decode_line_1 (&arg, 1, (struct symtab *) NULL, - 0, (char ***) NULL); - - if (sals.nelts != 1) - error ("Couldn't get information on specified line."); - - sal = sals.sals[0]; - xfree (sals.sals); /* malloc'd, so freed */ - - if (*arg) - error ("Junk at end of arguments."); - - resolve_sal_pc (&sal); - - breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until); - - if (!event_loop_p || !target_can_async_p ()) - old_chain = make_cleanup_delete_breakpoint (breakpoint); - else - old_chain = make_exec_cleanup_delete_breakpoint (breakpoint); - - /* If we are running asynchronously, and the target supports async - execution, we are not waiting for the target to stop, in the call - tp proceed, below. This means that we cannot delete the - brekpoints until the target has actually stopped. The only place - where we get a chance to do that is in fetch_inferior_event, so - we must set things up for that. */ - - if (event_loop_p && target_can_async_p ()) - { - /* In this case the arg for the continuation is just the point - in the exec_cleanups chain from where to start doing - cleanups, because all the continuation does is the cleanups in - the exec_cleanup_chain. */ - arg1 = - (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); - arg1->next = NULL; - arg1->data.pointer = old_chain; - - add_continuation (until_break_command_continuation, arg1); - } - - /* Keep within the current frame */ - - if (prev_frame) - { - sal = find_pc_line (prev_frame->pc, 0); - sal.pc = prev_frame->pc; - breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until); - if (!event_loop_p || !target_can_async_p ()) - make_cleanup_delete_breakpoint (breakpoint); - else - make_exec_cleanup_delete_breakpoint (breakpoint); - } - - proceed (-1, TARGET_SIGNAL_DEFAULT, 0); - /* Do the cleanups now, anly if we are not running asynchronously, - of if we are, but the target is still synchronous. */ - if (!event_loop_p || !target_can_async_p ()) - do_cleanups (old_chain); -} - -#if 0 -/* These aren't used; I don't konw what they were for. */ -/* Set a breakpoint at the catch clause for NAME. */ -static int -catch_breakpoint (char *name) -{ -} - -static int -disable_catch_breakpoint (void) -{ -} - -static int -delete_catch_breakpoint (void) -{ -} - -static int -enable_catch_breakpoint (void) -{ -} -#endif /* 0 */ - -struct sal_chain -{ - struct sal_chain *next; - struct symtab_and_line sal; -}; - -#if 0 -/* Not really used -- invocation in handle_gnu_4_16_catch_command - had been commented out in the v.4.16 sources, and stays - disabled there now because "catch NAME" syntax isn't allowed. - pai/1997-07-11 */ -/* This isn't used; I don't know what it was for. */ -/* For each catch clause identified in ARGS, run FUNCTION - with that clause as an argument. */ -static struct symtabs_and_lines -map_catch_names (char *args, int (*function) ()) -{ - register char *p = args; - register char *p1; - struct symtabs_and_lines sals; -#if 0 - struct sal_chain *sal_chain = 0; -#endif - - if (p == 0) - error_no_arg ("one or more catch names"); - - sals.nelts = 0; - sals.sals = NULL; - - while (*p) - { - p1 = p; - /* Don't swallow conditional part. */ - if (p1[0] == 'i' && p1[1] == 'f' - && (p1[2] == ' ' || p1[2] == '\t')) - break; - - if (isalpha (*p1)) - { - p1++; - while (isalnum (*p1) || *p1 == '_' || *p1 == '$') - p1++; - } - - if (*p1 && *p1 != ' ' && *p1 != '\t') - error ("Arguments must be catch names."); - - *p1 = 0; -#if 0 - if (function (p)) - { - struct sal_chain *next = (struct sal_chain *) - alloca (sizeof (struct sal_chain)); - next->next = sal_chain; - next->sal = get_catch_sal (p); - sal_chain = next; - goto win; - } -#endif - printf_unfiltered ("No catch clause for exception %s.\n", p); -#if 0 - win: -#endif - p = p1; - while (*p == ' ' || *p == '\t') - p++; - } -} -#endif - -/* This shares a lot of code with `print_frame_label_vars' from stack.c. */ - -static struct symtabs_and_lines -get_catch_sals (int this_level_only) -{ - register struct blockvector *bl; - register struct block *block; - int index, have_default = 0; - CORE_ADDR pc; - struct symtabs_and_lines sals; - struct sal_chain *sal_chain = 0; - char *blocks_searched; - - /* Not sure whether an error message is always the correct response, - but it's better than a core dump. */ - if (selected_frame == NULL) - error ("No selected frame."); - block = get_frame_block (selected_frame, 0); - pc = selected_frame->pc; - - sals.nelts = 0; - sals.sals = NULL; - - if (block == 0) - error ("No symbol table info available.\n"); - - bl = blockvector_for_pc (BLOCK_END (block) - 4, &index); - blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); - memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); - - while (block != 0) - { - CORE_ADDR end = BLOCK_END (block) - 4; - int last_index; - - if (bl != blockvector_for_pc (end, &index)) - error ("blockvector blotch"); - if (BLOCKVECTOR_BLOCK (bl, index) != block) - error ("blockvector botch"); - last_index = BLOCKVECTOR_NBLOCKS (bl); - index += 1; - - /* Don't print out blocks that have gone by. */ - while (index < last_index - && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc) - index++; - - while (index < last_index - && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end) - { - if (blocks_searched[index] == 0) - { - struct block *b = BLOCKVECTOR_BLOCK (bl, index); - register int i; - register struct symbol *sym; - - ALL_BLOCK_SYMBOLS (b, i, sym) - { - if (STREQ (SYMBOL_NAME (sym), "default")) - { - if (have_default) - continue; - have_default = 1; - } - if (SYMBOL_CLASS (sym) == LOC_LABEL) - { - struct sal_chain *next = (struct sal_chain *) - alloca (sizeof (struct sal_chain)); - next->next = sal_chain; - next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), - 0); - sal_chain = next; - } - } - blocks_searched[index] = 1; - } - index++; - } - if (have_default) - break; - if (sal_chain && this_level_only) - break; - - /* After handling the function's top-level block, stop. - Don't continue to its superblock, the block of - per-file symbols. */ - if (BLOCK_FUNCTION (block)) - break; - block = BLOCK_SUPERBLOCK (block); - } - - if (sal_chain) - { - struct sal_chain *tmp_chain; - - /* Count the number of entries. */ - for (index = 0, tmp_chain = sal_chain; tmp_chain; - tmp_chain = tmp_chain->next) - index++; - - sals.nelts = index; - sals.sals = (struct symtab_and_line *) - xmalloc (index * sizeof (struct symtab_and_line)); - for (index = 0; sal_chain; sal_chain = sal_chain->next, index++) - sals.sals[index] = sal_chain->sal; - } - - return sals; -} - -static void -ep_skip_leading_whitespace (char **s) -{ - if ((s == NULL) || (*s == NULL)) - return; - while (isspace (**s)) - *s += 1; -} - -/* This function examines a string, and attempts to find a token - that might be an event name in the leading characters. If a - possible match is found, a pointer to the last character of - the token is returned. Else, NULL is returned. */ - -static char * -ep_find_event_name_end (char *arg) -{ - char *s = arg; - char *event_name_end = NULL; - - /* If we could depend upon the presense of strrpbrk, we'd use that... */ - if (arg == NULL) - return NULL; - - /* We break out of the loop when we find a token delimiter. - Basically, we're looking for alphanumerics and underscores; - anything else delimites the token. */ - while (*s != '\0') - { - if (!isalnum (*s) && (*s != '_')) - break; - event_name_end = s; - s++; - } - - return event_name_end; -} - - -/* This function attempts to parse an optional "if <cond>" clause - from the arg string. If one is not found, it returns NULL. - - Else, it returns a pointer to the condition string. (It does not - attempt to evaluate the string against a particular block.) And, - it updates arg to point to the first character following the parsed - if clause in the arg string. */ - -static char * -ep_parse_optional_if_clause (char **arg) -{ - char *cond_string; - - if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2])) - return NULL; - - /* Skip the "if" keyword. */ - (*arg) += 2; - - /* Skip any extra leading whitespace, and record the start of the - condition string. */ - ep_skip_leading_whitespace (arg); - cond_string = *arg; - - /* Assume that the condition occupies the remainder of the arg string. */ - (*arg) += strlen (cond_string); - - return cond_string; -} - -/* This function attempts to parse an optional filename from the arg - string. If one is not found, it returns NULL. - - Else, it returns a pointer to the parsed filename. (This function - makes no attempt to verify that a file of that name exists, or is - accessible.) And, it updates arg to point to the first character - following the parsed filename in the arg string. - - Note that clients needing to preserve the returned filename for - future access should copy it to their own buffers. */ -static char * -ep_parse_optional_filename (char **arg) -{ - static char filename[1024]; - char *arg_p = *arg; - int i; - char c; - - if ((*arg_p == '\0') || isspace (*arg_p)) - return NULL; - - for (i = 0;; i++) - { - c = *arg_p; - if (isspace (c)) - c = '\0'; - filename[i] = c; - if (c == '\0') - break; - arg_p++; - } - *arg = arg_p; - - return filename; -} - -/* Commands to deal with catching events, such as signals, exceptions, - process start/exit, etc. */ - -typedef enum -{ - catch_fork, catch_vfork -} -catch_fork_kind; - -#if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT) -static void catch_fork_command_1 (catch_fork_kind fork_kind, - char *arg, int tempflag, int from_tty); - -static void -catch_fork_command_1 (catch_fork_kind fork_kind, char *arg, int tempflag, - int from_tty) -{ - char *cond_string = NULL; - - ep_skip_leading_whitespace (&arg); - - /* The allowed syntax is: - catch [v]fork - catch [v]fork if <cond> - - First, check if there's an if clause. */ - cond_string = ep_parse_optional_if_clause (&arg); - - if ((*arg != '\0') && !isspace (*arg)) - error ("Junk at end of arguments."); - - /* If this target supports it, create a fork or vfork catchpoint - and enable reporting of such events. */ - switch (fork_kind) - { - case catch_fork: - create_fork_event_catchpoint (tempflag, cond_string); - break; - case catch_vfork: - create_vfork_event_catchpoint (tempflag, cond_string); - break; - default: - error ("unsupported or unknown fork kind; cannot catch it"); - break; - } -} -#endif - -#if defined(CHILD_INSERT_EXEC_CATCHPOINT) -static void -catch_exec_command_1 (char *arg, int tempflag, int from_tty) -{ - char *cond_string = NULL; - - ep_skip_leading_whitespace (&arg); - - /* The allowed syntax is: - catch exec - catch exec if <cond> - - First, check if there's an if clause. */ - cond_string = ep_parse_optional_if_clause (&arg); - - if ((*arg != '\0') && !isspace (*arg)) - error ("Junk at end of arguments."); - - /* If this target supports it, create an exec catchpoint - and enable reporting of such events. */ - create_exec_event_catchpoint (tempflag, cond_string); -} -#endif - -#if defined(SOLIB_ADD) -static void -catch_load_command_1 (char *arg, int tempflag, int from_tty) -{ - char *dll_pathname = NULL; - char *cond_string = NULL; - - ep_skip_leading_whitespace (&arg); - - /* The allowed syntax is: - catch load - catch load if <cond> - catch load <filename> - catch load <filename> if <cond> - - The user is not allowed to specify the <filename> after an - if clause. - - We'll ignore the pathological case of a file named "if". - - First, check if there's an if clause. If so, then there - cannot be a filename. */ - cond_string = ep_parse_optional_if_clause (&arg); - - /* If there was an if clause, then there cannot be a filename. - Else, there might be a filename and an if clause. */ - if (cond_string == NULL) - { - dll_pathname = ep_parse_optional_filename (&arg); - ep_skip_leading_whitespace (&arg); - cond_string = ep_parse_optional_if_clause (&arg); - } - - if ((*arg != '\0') && !isspace (*arg)) - error ("Junk at end of arguments."); - - /* Create a load breakpoint that only triggers when a load of - the specified dll (or any dll, if no pathname was specified) - occurs. */ - SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid), tempflag, - dll_pathname, cond_string); -} - -static void -catch_unload_command_1 (char *arg, int tempflag, int from_tty) -{ - char *dll_pathname = NULL; - char *cond_string = NULL; - - ep_skip_leading_whitespace (&arg); - - /* The allowed syntax is: - catch unload - catch unload if <cond> - catch unload <filename> - catch unload <filename> if <cond> - - The user is not allowed to specify the <filename> after an - if clause. - - We'll ignore the pathological case of a file named "if". - - First, check if there's an if clause. If so, then there - cannot be a filename. */ - cond_string = ep_parse_optional_if_clause (&arg); - - /* If there was an if clause, then there cannot be a filename. - Else, there might be a filename and an if clause. */ - if (cond_string == NULL) - { - dll_pathname = ep_parse_optional_filename (&arg); - ep_skip_leading_whitespace (&arg); - cond_string = ep_parse_optional_if_clause (&arg); - } - - if ((*arg != '\0') && !isspace (*arg)) - error ("Junk at end of arguments."); - - /* Create an unload breakpoint that only triggers when an unload of - the specified dll (or any dll, if no pathname was specified) - occurs. */ - SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid), tempflag, - dll_pathname, cond_string); -} -#endif /* SOLIB_ADD */ - -/* Commands to deal with catching exceptions. */ - -/* Set a breakpoint at the specified callback routine for an - exception event callback */ - -static void -create_exception_catchpoint (int tempflag, char *cond_string, - enum exception_event_kind ex_event, - struct symtab_and_line *sal) -{ - struct breakpoint *b; - int thread = -1; /* All threads. */ - enum bptype bptype; - - if (!sal) /* no exception support? */ - return; - - switch (ex_event) - { - case EX_EVENT_THROW: - bptype = bp_catch_throw; - break; - case EX_EVENT_CATCH: - bptype = bp_catch_catch; - break; - default: /* error condition */ - error ("Internal error -- invalid catchpoint kind"); - } - - b = set_raw_breakpoint (*sal, bptype); - set_breakpoint_count (breakpoint_count + 1); - b->number = breakpoint_count; - b->cond = NULL; - b->cond_string = (cond_string == NULL) ? - NULL : savestring (cond_string, strlen (cond_string)); - b->thread = thread; - b->addr_string = NULL; - b->enable_state = bp_enabled; - b->disposition = tempflag ? disp_del : disp_donttouch; - mention (b); -} - -/* Deal with "catch catch" and "catch throw" commands */ - -static void -catch_exception_command_1 (enum exception_event_kind ex_event, char *arg, - int tempflag, int from_tty) -{ - char *cond_string = NULL; - struct symtab_and_line *sal = NULL; - - ep_skip_leading_whitespace (&arg); - - cond_string = ep_parse_optional_if_clause (&arg); - - if ((*arg != '\0') && !isspace (*arg)) - error ("Junk at end of arguments."); - - if ((ex_event != EX_EVENT_THROW) && - (ex_event != EX_EVENT_CATCH)) - error ("Unsupported or unknown exception event; cannot catch it"); - - /* See if we can find a callback routine */ - sal = target_enable_exception_callback (ex_event, 1); - - if (sal) - { - /* We have callbacks from the runtime system for exceptions. - Set a breakpoint on the sal found, if no errors */ - if (sal != (struct symtab_and_line *) -1) - create_exception_catchpoint (tempflag, cond_string, ex_event, sal); - else - return; /* something went wrong with setting up callbacks */ - } - else - { - /* No callbacks from runtime system for exceptions. - Try GNU C++ exception breakpoints using labels in debug info. */ - if (ex_event == EX_EVENT_CATCH) - { - handle_gnu_4_16_catch_command (arg, tempflag, from_tty); - } - else if (ex_event == EX_EVENT_THROW) - { - /* Set a breakpoint on __raise_exception () */ - - warning ("Unsupported with this platform/compiler combination."); - warning ("Perhaps you can achieve the effect you want by setting"); - warning ("a breakpoint on __raise_exception()."); - } - } -} - -/* Cover routine to allow wrapping target_enable_exception_catchpoints - inside a catch_errors */ - -static int -cover_target_enable_exception_callback (PTR arg) -{ - args_for_catchpoint_enable *args = arg; - struct symtab_and_line *sal; - sal = target_enable_exception_callback (args->kind, args->enable_p); - if (sal == NULL) - return 0; - else if (sal == (struct symtab_and_line *) -1) - return -1; - else - return 1; /*is valid */ -} - - - -/* This is the original v.4.16 and earlier version of the - catch_command_1() function. Now that other flavours of "catch" - have been introduced, and since exception handling can be handled - in other ways (through target ops) also, this is used only for the - GNU C++ exception handling system. - Note: Only the "catch" flavour of GDB 4.16 is handled here. The - "catch NAME" is now no longer allowed in catch_command_1(). Also, - there was no code in GDB 4.16 for "catch throw". - - Called from catch_exception_command_1 () */ - - -static void -handle_gnu_4_16_catch_command (char *arg, int tempflag, int from_tty) -{ - /* First, translate ARG into something we can deal with in terms - of breakpoints. */ - - struct symtabs_and_lines sals; - struct symtab_and_line sal; - register struct expression *cond = 0; - register struct breakpoint *b; - char *save_arg; - int i; - - INIT_SAL (&sal); /* initialize to zeroes */ - - /* If no arg given, or if first arg is 'if ', all active catch clauses - are breakpointed. */ - - if (!arg || (arg[0] == 'i' && arg[1] == 'f' - && (arg[2] == ' ' || arg[2] == '\t'))) - { - /* Grab all active catch clauses. */ - sals = get_catch_sals (0); - } - else - { - /* Grab selected catch clauses. */ - error ("catch NAME not implemented"); - -#if 0 - /* Not sure why this code has been disabled. I'm leaving - it disabled. We can never come here now anyway - since we don't allow the "catch NAME" syntax. - pai/1997-07-11 */ - - /* This isn't used; I don't know what it was for. */ - sals = map_catch_names (arg, catch_breakpoint); -#endif - } - - if (!sals.nelts) - return; - - save_arg = arg; - for (i = 0; i < sals.nelts; i++) - { - resolve_sal_pc (&sals.sals[i]); - - while (arg && *arg) - { - if (arg[0] == 'i' && arg[1] == 'f' - && (arg[2] == ' ' || arg[2] == '\t')) - cond = parse_exp_1 ((arg += 2, &arg), - block_for_pc (sals.sals[i].pc), 0); - else - error ("Junk at end of arguments."); - } - arg = save_arg; - } - - for (i = 0; i < sals.nelts; i++) - { - sal = sals.sals[i]; - - if (from_tty) - describe_other_breakpoints (sal.pc, sal.section); - - /* Important -- this is an ordinary breakpoint. For platforms - with callback support for exceptions, - create_exception_catchpoint() will create special bp types - (bp_catch_catch and bp_catch_throw), and there is code in - insert_breakpoints() and elsewhere that depends on that. */ - b = set_raw_breakpoint (sal, bp_breakpoint); - set_breakpoint_count (breakpoint_count + 1); - b->number = breakpoint_count; - - b->cond = cond; - b->enable_state = bp_enabled; - b->disposition = tempflag ? disp_del : disp_donttouch; - - mention (b); - } - - if (sals.nelts > 1) - { - warning ("Multiple breakpoints were set."); - warning ("Use the \"delete\" command to delete unwanted breakpoints."); - } - xfree (sals.sals); -} - -static void -catch_command_1 (char *arg, int tempflag, int from_tty) -{ - - /* The first argument may be an event name, such as "start" or "load". - If so, then handle it as such. If it doesn't match an event name, - then attempt to interpret it as an exception name. (This latter is - the v4.16-and-earlier GDB meaning of the "catch" command.) - - First, try to find the bounds of what might be an event name. */ - char *arg1_start = arg; - char *arg1_end; - int arg1_length; - - if (arg1_start == NULL) - { - /* Old behaviour was to use pre-v-4.16 syntax */ - /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */ - /* return; */ - /* Now, this is not allowed */ - error ("Catch requires an event name."); - - } - arg1_end = ep_find_event_name_end (arg1_start); - if (arg1_end == NULL) - error ("catch requires an event"); - arg1_length = arg1_end + 1 - arg1_start; - - /* Try to match what we found against known event names. */ - if (strncmp (arg1_start, "signal", arg1_length) == 0) - { - error ("Catch of signal not yet implemented"); - } - else if (strncmp (arg1_start, "catch", arg1_length) == 0) - { - catch_exception_command_1 (EX_EVENT_CATCH, arg1_end + 1, - tempflag, from_tty); - } - else if (strncmp (arg1_start, "throw", arg1_length) == 0) - { - catch_exception_command_1 (EX_EVENT_THROW, arg1_end + 1, - tempflag, from_tty); - } - else if (strncmp (arg1_start, "thread_start", arg1_length) == 0) - { - error ("Catch of thread_start not yet implemented"); - } - else if (strncmp (arg1_start, "thread_exit", arg1_length) == 0) - { - error ("Catch of thread_exit not yet implemented"); - } - else if (strncmp (arg1_start, "thread_join", arg1_length) == 0) - { - error ("Catch of thread_join not yet implemented"); - } - else if (strncmp (arg1_start, "start", arg1_length) == 0) - { - error ("Catch of start not yet implemented"); - } - else if (strncmp (arg1_start, "exit", arg1_length) == 0) - { - error ("Catch of exit not yet implemented"); - } - else if (strncmp (arg1_start, "fork", arg1_length) == 0) - { -#if defined(CHILD_INSERT_FORK_CATCHPOINT) - catch_fork_command_1 (catch_fork, arg1_end + 1, tempflag, from_tty); -#else - error ("Catch of fork not yet implemented"); -#endif - } - else if (strncmp (arg1_start, "vfork", arg1_length) == 0) - { -#if defined(CHILD_INSERT_VFORK_CATCHPOINT) - catch_fork_command_1 (catch_vfork, arg1_end + 1, tempflag, from_tty); -#else - error ("Catch of vfork not yet implemented"); -#endif - } - else if (strncmp (arg1_start, "exec", arg1_length) == 0) - { -#if defined(CHILD_INSERT_EXEC_CATCHPOINT) - catch_exec_command_1 (arg1_end + 1, tempflag, from_tty); -#else - error ("Catch of exec not yet implemented"); -#endif - } - else if (strncmp (arg1_start, "load", arg1_length) == 0) - { -#if defined(SOLIB_ADD) - catch_load_command_1 (arg1_end + 1, tempflag, from_tty); -#else - error ("Catch of load not implemented"); -#endif - } - else if (strncmp (arg1_start, "unload", arg1_length) == 0) - { -#if defined(SOLIB_ADD) - catch_unload_command_1 (arg1_end + 1, tempflag, from_tty); -#else - error ("Catch of load not implemented"); -#endif - } - else if (strncmp (arg1_start, "stop", arg1_length) == 0) - { - error ("Catch of stop not yet implemented"); - } - - /* This doesn't appear to be an event name */ - - else - { - /* Pre-v.4.16 behaviour was to treat the argument - as the name of an exception */ - /* catch_throw_command_1 (arg1_start, tempflag, from_tty); */ - /* Now this is not allowed */ - error ("Unknown event kind specified for catch"); - - } -} - -/* Used by the gui, could be made a worker for other things. */ - -struct breakpoint * -set_breakpoint_sal (struct symtab_and_line sal) -{ - struct breakpoint *b; - b = set_raw_breakpoint (sal, bp_breakpoint); - set_breakpoint_count (breakpoint_count + 1); - b->number = breakpoint_count; - b->cond = 0; - b->thread = -1; - return b; -} - -#if 0 -/* These aren't used; I don't know what they were for. */ -/* Disable breakpoints on all catch clauses described in ARGS. */ -static void -disable_catch (char *args) -{ - /* Map the disable command to catch clauses described in ARGS. */ -} - -/* Enable breakpoints on all catch clauses described in ARGS. */ -static void -enable_catch (char *args) -{ - /* Map the disable command to catch clauses described in ARGS. */ -} - -/* Delete breakpoints on all catch clauses in the active scope. */ -static void -delete_catch (char *args) -{ - /* Map the delete command to catch clauses described in ARGS. */ -} -#endif /* 0 */ - -static void -catch_command (char *arg, int from_tty) -{ - catch_command_1 (arg, 0, from_tty); -} - - -static void -tcatch_command (char *arg, int from_tty) -{ - catch_command_1 (arg, 1, from_tty); -} - -/* Delete breakpoints by address or line. */ - -static void -clear_command (char *arg, int from_tty) -{ - struct breakpoint *b, *tmp, *prev, *found; - int default_match; - struct symtabs_and_lines sals; - struct symtab_and_line sal; - int i; - - if (arg) - { - sals = decode_line_spec (arg, 1); - default_match = 0; - } - else - { - sals.sals = (struct symtab_and_line *) - xmalloc (sizeof (struct symtab_and_line)); - make_cleanup (xfree, sals.sals); - INIT_SAL (&sal); /* initialize to zeroes */ - sal.line = default_breakpoint_line; - sal.symtab = default_breakpoint_symtab; - sal.pc = default_breakpoint_address; - if (sal.symtab == 0) - error ("No source file specified."); - - sals.sals[0] = sal; - sals.nelts = 1; - - default_match = 1; - } - - /* For each line spec given, delete bps which correspond - to it. Do it in two passes, solely to preserve the current - behavior that from_tty is forced true if we delete more than - one breakpoint. */ - - found = NULL; - for (i = 0; i < sals.nelts; i++) - { - /* If exact pc given, clear bpts at that pc. - If line given (pc == 0), clear all bpts on specified line. - If defaulting, clear all bpts on default line - or at default pc. - - defaulting sal.pc != 0 tests to do - - 0 1 pc - 1 1 pc _and_ line - 0 0 line - 1 0 <can't happen> */ - - sal = sals.sals[i]; - prev = NULL; - - /* Find all matching breakpoints, remove them from the - breakpoint chain, and add them to the 'found' chain. */ - ALL_BREAKPOINTS_SAFE (b, tmp) - { - /* Are we going to delete b? */ - if (b->type != bp_none - && b->type != bp_watchpoint - && b->type != bp_hardware_watchpoint - && b->type != bp_read_watchpoint - && b->type != bp_access_watchpoint - /* Not if b is a watchpoint of any sort... */ - && (((sal.pc && (b->address == sal.pc)) - && (!section_is_overlay (b->section) - || b->section == sal.section)) - /* Yes, if sal.pc matches b (modulo overlays). */ - || ((default_match || (0 == sal.pc)) - && b->source_file != NULL - && sal.symtab != NULL - && STREQ (b->source_file, sal.symtab->filename) - && b->line_number == sal.line))) - /* Yes, if sal source file and line matches b. */ - { - /* Remove it from breakpoint_chain... */ - if (b == breakpoint_chain) - { - /* b is at the head of the list */ - breakpoint_chain = b->next; - } - else - { - prev->next = b->next; - } - /* And add it to 'found' chain. */ - b->next = found; - found = b; - } - else - { - /* Keep b, and keep a pointer to it. */ - prev = b; - } - } - } - /* Now go thru the 'found' chain and delete them. */ - if (found == 0) - { - if (arg) - error ("No breakpoint at %s.", arg); - else - error ("No breakpoint at this line."); - } - - if (found->next) - from_tty = 1; /* Always report if deleted more than one */ - if (from_tty) - printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : ""); - breakpoints_changed (); - while (found) - { - if (from_tty) - printf_unfiltered ("%d ", found->number); - tmp = found->next; - delete_breakpoint (found); - found = tmp; - } - if (from_tty) - putchar_unfiltered ('\n'); -} - -/* Delete breakpoint in BS if they are `delete' breakpoints and - all breakpoints that are marked for deletion, whether hit or not. - This is called after any breakpoint is hit, or after errors. */ - -void -breakpoint_auto_delete (bpstat bs) -{ - struct breakpoint *b, *temp; - - for (; bs; bs = bs->next) - if (bs->breakpoint_at && bs->breakpoint_at->disposition == disp_del - && bs->stop) - delete_breakpoint (bs->breakpoint_at); - - ALL_BREAKPOINTS_SAFE (b, temp) - { - if (b->disposition == disp_del_at_next_stop) - delete_breakpoint (b); - } -} - -/* Delete a breakpoint and clean up all traces of it in the data - structures. */ - -void -delete_breakpoint (struct breakpoint *bpt) -{ - register struct breakpoint *b; - register bpstat bs; - - if (bpt == NULL) - error ("Internal error (attempted to delete a NULL breakpoint)"); - - - /* Has this bp already been deleted? This can happen because multiple - lists can hold pointers to bp's. bpstat lists are especial culprits. - - One example of this happening is a watchpoint's scope bp. When the - scope bp triggers, we notice that the watchpoint is out of scope, and - delete it. We also delete its scope bp. But the scope bp is marked - "auto-deleting", and is already on a bpstat. That bpstat is then - checked for auto-deleting bp's, which are deleted. - - A real solution to this problem might involve reference counts in bp's, - and/or giving them pointers back to their referencing bpstat's, and - teaching delete_breakpoint to only free a bp's storage when no more - references were extent. A cheaper bandaid was chosen. */ - if (bpt->type == bp_none) - return; - - if (delete_breakpoint_hook) - delete_breakpoint_hook (bpt); - breakpoint_delete_event (bpt->number); - - if (bpt->inserted) - remove_breakpoint (bpt, mark_inserted); - - if (breakpoint_chain == bpt) - breakpoint_chain = bpt->next; - - /* If we have callback-style exception catchpoints, don't go through - the adjustments to the C++ runtime library etc. if the inferior - isn't actually running. target_enable_exception_callback for a - null target ops vector gives an undesirable error message, so we - check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's - exceptions are supported in this way, it's OK for now. FIXME */ - if (ep_is_exception_catchpoint (bpt) && target_has_execution) - { - static char message1[] = "Error in deleting catchpoint %d:\n"; - static char message[sizeof (message1) + 30]; - args_for_catchpoint_enable args; - - /* Format possible error msg */ - sprintf (message, message1, bpt->number); - args.kind = bpt->type == bp_catch_catch ? - EX_EVENT_CATCH : EX_EVENT_THROW; - args.enable_p = 0; - catch_errors (cover_target_enable_exception_callback, &args, - message, RETURN_MASK_ALL); - } - - - ALL_BREAKPOINTS (b) - if (b->next == bpt) - { - b->next = bpt->next; - break; - } - - check_duplicates (bpt); - /* If this breakpoint was inserted, and there is another breakpoint - at the same address, we need to insert the other breakpoint. */ - if (bpt->inserted - && bpt->type != bp_hardware_watchpoint - && bpt->type != bp_read_watchpoint - && bpt->type != bp_access_watchpoint - && bpt->type != bp_catch_fork - && bpt->type != bp_catch_vfork - && bpt->type != bp_catch_exec) - { - ALL_BREAKPOINTS (b) - if (b->address == bpt->address - && b->section == bpt->section - && !b->duplicate - && b->enable_state != bp_disabled - && b->enable_state != bp_shlib_disabled - && b->enable_state != bp_call_disabled) - { - int val; - - /* We should never reach this point if there is a permanent - breakpoint at the same address as the one being deleted. - If there is a permanent breakpoint somewhere, it should - always be the only one inserted. */ - if (b->enable_state == bp_permanent) - internal_error (__FILE__, __LINE__, - "another breakpoint was inserted on top of " - "a permanent breakpoint"); - - if (b->type == bp_hardware_breakpoint) - val = target_insert_hw_breakpoint (b->address, b->shadow_contents); - else - val = target_insert_breakpoint (b->address, b->shadow_contents); - - /* If there was an error in the insert, print a message, then stop execution. */ - if (val != 0) - { - struct ui_file *tmp_error_stream = mem_fileopen (); - make_cleanup_ui_file_delete (tmp_error_stream); - - - if (b->type == bp_hardware_breakpoint) - { - fprintf_unfiltered (tmp_error_stream, - "Cannot insert hardware breakpoint %d.\n" - "You may have requested too many hardware breakpoints.\n", - b->number); - } - else - { - fprintf_unfiltered (tmp_error_stream, "Cannot insert breakpoint %d.\n", b->number); - fprintf_filtered (tmp_error_stream, "Error accessing memory address "); - print_address_numeric (b->address, 1, tmp_error_stream); - fprintf_filtered (tmp_error_stream, ": %s.\n", - safe_strerror (val)); - } - - fprintf_unfiltered (tmp_error_stream,"The same program may be running in another process."); - target_terminal_ours_for_output (); - error_stream(tmp_error_stream); - } - else - b->inserted = 1; - } - } - - free_command_lines (&bpt->commands); - if (bpt->cond) - xfree (bpt->cond); - if (bpt->cond_string != NULL) - xfree (bpt->cond_string); - if (bpt->addr_string != NULL) - xfree (bpt->addr_string); - if (bpt->exp != NULL) - xfree (bpt->exp); - if (bpt->exp_string != NULL) - xfree (bpt->exp_string); - if (bpt->val != NULL) - value_free (bpt->val); - if (bpt->source_file != NULL) - xfree (bpt->source_file); - if (bpt->dll_pathname != NULL) - xfree (bpt->dll_pathname); - if (bpt->triggered_dll_pathname != NULL) - xfree (bpt->triggered_dll_pathname); - if (bpt->exec_pathname != NULL) - xfree (bpt->exec_pathname); - - /* Be sure no bpstat's are pointing at it after it's been freed. */ - /* FIXME, how can we find all bpstat's? - We just check stop_bpstat for now. */ - for (bs = stop_bpstat; bs; bs = bs->next) - if (bs->breakpoint_at == bpt) - { - bs->breakpoint_at = NULL; - bs->old_val = NULL; - /* bs->commands will be freed later. */ - } - /* On the chance that someone will soon try again to delete this same - bp, we mark it as deleted before freeing its storage. */ - bpt->type = bp_none; - - xfree (bpt); -} - -static void -do_delete_breakpoint_cleanup (void *b) -{ - delete_breakpoint (b); -} - -struct cleanup * -make_cleanup_delete_breakpoint (struct breakpoint *b) -{ - return make_cleanup (do_delete_breakpoint_cleanup, b); -} - -struct cleanup * -make_exec_cleanup_delete_breakpoint (struct breakpoint *b) -{ - return make_exec_cleanup (do_delete_breakpoint_cleanup, b); -} - -void -delete_command (char *arg, int from_tty) -{ - struct breakpoint *b, *temp; - - dont_repeat (); - - if (arg == 0) - { - int breaks_to_delete = 0; - - /* Delete all breakpoints if no argument. - Do not delete internal or call-dummy breakpoints, these - have to be deleted with an explicit breakpoint number argument. */ - ALL_BREAKPOINTS (b) - { - if (b->type != bp_call_dummy && - b->type != bp_shlib_event && - b->type != bp_thread_event && - b->type != bp_overlay_event && - b->number >= 0) - breaks_to_delete = 1; - } - - /* Ask user only if there are some breakpoints to delete. */ - if (!from_tty - || (breaks_to_delete && query ("Delete all breakpoints? "))) - { - ALL_BREAKPOINTS_SAFE (b, temp) - { - if (b->type != bp_call_dummy && - b->type != bp_shlib_event && - b->type != bp_thread_event && - b->type != bp_overlay_event && - b->number >= 0) - delete_breakpoint (b); - } - } - } - else - map_breakpoint_numbers (arg, delete_breakpoint); -} - -/* Reset a breakpoint given it's struct breakpoint * BINT. - The value we return ends up being the return value from catch_errors. - Unused in this case. */ - -static int -breakpoint_re_set_one (PTR bint) -{ - /* get past catch_errs */ - struct breakpoint *b = (struct breakpoint *) bint; - struct value *mark; - int i; - struct symtabs_and_lines sals; - char *s; - enum enable_state save_enable; - - switch (b->type) - { - case bp_none: - warning ("attempted to reset apparently deleted breakpoint #%d?", - b->number); - return 0; - case bp_breakpoint: - case bp_hardware_breakpoint: - case bp_catch_load: - case bp_catch_unload: - if (b->addr_string == NULL) - { - /* Anything without a string can't be re-set. */ - delete_breakpoint (b); - return 0; - } - /* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote: - - ``And a hack it is, although Apple's Darwin version of GDB - contains an almost identical hack to implement a "future - break" command. It seems to work in many real world cases, - but it is easy to come up with a test case where the patch - doesn't help at all.'' - - ``It seems that the way GDB implements breakpoints - in - - shared - libraries was designed for a.out shared library - systems (SunOS 4) where shared libraries were loaded at a - fixed address in memory. Since ELF shared libraries can (and - will) be loaded at any address in memory, things break. - Fixing this is not trivial. Therefore, I'm not sure whether - we should add this hack to the branch only. I cannot - guarantee that things will be fixed on the trunk in the near - future.'' - - In case we have a problem, disable this breakpoint. We'll - restore its status if we succeed. Don't disable a - shlib_disabled breakpoint though. There's a fair chance we - can't re-set it if the shared library it's in hasn't been - loaded yet. */ - save_enable = b->enable_state; - if (b->enable_state != bp_shlib_disabled) - b->enable_state = bp_disabled; - - set_language (b->language); - input_radix = b->input_radix; - s = b->addr_string; - sals = decode_line_1 (&s, 1, (struct symtab *) NULL, 0, (char ***) NULL); - for (i = 0; i < sals.nelts; i++) - { - resolve_sal_pc (&sals.sals[i]); - - /* Reparse conditions, they might contain references to the - old symtab. */ - if (b->cond_string != NULL) - { - s = b->cond_string; - if (b->cond) - xfree (b->cond); - b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0); - } - - /* We need to re-set the breakpoint if the address changes... */ - if (b->address != sals.sals[i].pc - /* ...or new and old breakpoints both have source files, and - the source file name or the line number changes... */ - || (b->source_file != NULL - && sals.sals[i].symtab != NULL - && (!STREQ (b->source_file, sals.sals[i].symtab->filename) - || b->line_number != sals.sals[i].line) - ) - /* ...or we switch between having a source file and not having - one. */ - || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL)) - ) - { - if (b->source_file != NULL) - xfree (b->source_file); - if (sals.sals[i].symtab == NULL) - b->source_file = NULL; - else - b->source_file = - savestring (sals.sals[i].symtab->filename, - strlen (sals.sals[i].symtab->filename)); - b->line_number = sals.sals[i].line; - b->address = sals.sals[i].pc; - - /* Used to check for duplicates here, but that can - cause trouble, as it doesn't check for disabled - breakpoints. */ - - mention (b); - - /* Might be better to do this just once per breakpoint_re_set, - rather than once for every breakpoint. */ - breakpoints_changed (); - } - b->section = sals.sals[i].section; - b->enable_state = save_enable; /* Restore it, this worked. */ - - - /* Now that this is re-enabled, check_duplicates - can be used. */ - check_duplicates (b); - - } - xfree (sals.sals); - break; - - case bp_watchpoint: - case bp_hardware_watchpoint: - case bp_read_watchpoint: - case bp_access_watchpoint: - innermost_block = NULL; - /* The issue arises of what context to evaluate this in. The - same one as when it was set, but what does that mean when - symbols have been re-read? We could save the filename and - functionname, but if the context is more local than that, the - best we could do would be something like how many levels deep - and which index at that particular level, but that's going to - be less stable than filenames or function names. */ - - /* So for now, just use a global context. */ - if (b->exp) - xfree (b->exp); - b->exp = parse_expression (b->exp_string); - b->exp_valid_block = innermost_block; - mark = value_mark (); - if (b->val) - value_free (b->val); - b->val = evaluate_expression (b->exp); - release_value (b->val); - if (VALUE_LAZY (b->val)) - value_fetch_lazy (b->val); - - if (b->cond_string != NULL) - { - s = b->cond_string; - if (b->cond) - xfree (b->cond); - b->cond = parse_exp_1 (&s, (struct block *) 0, 0); - } - if (b->enable_state == bp_enabled) - mention (b); - value_free_to_mark (mark); - break; - case bp_catch_catch: - case bp_catch_throw: - break; - /* We needn't really do anything to reset these, since the mask - that requests them is unaffected by e.g., new libraries being - loaded. */ - case bp_catch_fork: - case bp_catch_vfork: - case bp_catch_exec: - break; - - default: - printf_filtered ("Deleting unknown breakpoint type %d\n", b->type); - /* fall through */ - /* Delete longjmp and overlay event breakpoints; they will be - reset later by breakpoint_re_set. */ - case bp_longjmp: - case bp_longjmp_resume: - case bp_overlay_event: - delete_breakpoint (b); - break; - - /* This breakpoint is special, it's set up when the inferior - starts and we really don't want to touch it. */ - case bp_shlib_event: - - /* Like bp_shlib_event, this breakpoint type is special. - Once it is set up, we do not want to touch it. */ - case bp_thread_event: - - /* Keep temporary breakpoints, which can be encountered when we step - over a dlopen call and SOLIB_ADD is resetting the breakpoints. - Otherwise these should have been blown away via the cleanup chain - or by breakpoint_init_inferior when we rerun the executable. */ - case bp_until: - case bp_finish: - case bp_watchpoint_scope: - case bp_call_dummy: - case bp_step_resume: - break; - } - - return 0; -} - -/* Re-set all breakpoints after symbols have been re-loaded. */ -void -breakpoint_re_set (void) -{ - struct breakpoint *b, *temp; - enum language save_language; - int save_input_radix; - static char message1[] = "Error in re-setting breakpoint %d:\n"; - char message[sizeof (message1) + 30 /* slop */ ]; - - save_language = current_language->la_language; - save_input_radix = input_radix; - ALL_BREAKPOINTS_SAFE (b, temp) - { - /* Format possible error msg */ - sprintf (message, message1, b->number); - catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL); - } - set_language (save_language); - input_radix = save_input_radix; - - if (GET_LONGJMP_TARGET_P ()) - { - create_longjmp_breakpoint ("longjmp"); - create_longjmp_breakpoint ("_longjmp"); - create_longjmp_breakpoint ("siglongjmp"); - create_longjmp_breakpoint ("_siglongjmp"); - create_longjmp_breakpoint (NULL); - } - - create_overlay_event_breakpoint ("_ovly_debug_event"); -} - -/* Reset the thread number of this breakpoint: - - - If the breakpoint is for all threads, leave it as-is. - - Else, reset it to the current thread for inferior_ptid. */ -void -breakpoint_re_set_thread (struct breakpoint *b) -{ - if (b->thread != -1) - { - if (in_thread_list (inferior_ptid)) - b->thread = pid_to_thread_id (inferior_ptid); - } -} - -/* Set ignore-count of breakpoint number BPTNUM to COUNT. - If from_tty is nonzero, it prints a message to that effect, - which ends with a period (no newline). */ - -void -set_ignore_count (int bptnum, int count, int from_tty) -{ - register struct breakpoint *b; - - if (count < 0) - count = 0; - - ALL_BREAKPOINTS (b) - if (b->number == bptnum) - { - b->ignore_count = count; - if (from_tty) - { - if (count == 0) - printf_filtered ("Will stop next time breakpoint %d is reached.", - bptnum); - else if (count == 1) - printf_filtered ("Will ignore next crossing of breakpoint %d.", - bptnum); - else - printf_filtered ("Will ignore next %d crossings of breakpoint %d.", - count, bptnum); - } - breakpoints_changed (); - breakpoint_modify_event (b->number); - return; - } - - error ("No breakpoint number %d.", bptnum); -} - -/* Clear the ignore counts of all breakpoints. */ -void -breakpoint_clear_ignore_counts (void) -{ - struct breakpoint *b; - - ALL_BREAKPOINTS (b) - b->ignore_count = 0; -} - -/* Command to set ignore-count of breakpoint N to COUNT. */ - -static void -ignore_command (char *args, int from_tty) -{ - char *p = args; - register int num; - - if (p == 0) - error_no_arg ("a breakpoint number"); - - num = get_number (&p); - if (num == 0) - error ("bad breakpoint number: '%s'", args); - if (*p == 0) - error ("Second argument (specified ignore-count) is missing."); - - set_ignore_count (num, - longest_to_int (value_as_long (parse_and_eval (p))), - from_tty); - if (from_tty) - printf_filtered ("\n"); -} - -/* Call FUNCTION on each of the breakpoints - whose numbers are given in ARGS. */ - -static void -map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *)) -{ - register char *p = args; - char *p1; - register int num; - register struct breakpoint *b, *tmp; - int match; - - if (p == 0) - error_no_arg ("one or more breakpoint numbers"); - - while (*p) - { - match = 0; - p1 = p; - - num = get_number_or_range (&p1); - if (num == 0) - { - warning ("bad breakpoint number at or near '%s'", p); - } - else - { - ALL_BREAKPOINTS_SAFE (b, tmp) - if (b->number == num) - { - struct breakpoint *related_breakpoint = b->related_breakpoint; - match = 1; - function (b); - if (related_breakpoint) - function (related_breakpoint); - break; - } - if (match == 0) - printf_unfiltered ("No breakpoint number %d.\n", num); - } - p = p1; - } -} - -/* Set ignore-count of breakpoint number BPTNUM to COUNT. - If from_tty is nonzero, it prints a message to that effect, - which ends with a period (no newline). */ - -void -disable_breakpoint (struct breakpoint *bpt) -{ - /* Never disable a watchpoint scope breakpoint; we want to - hit them when we leave scope so we can delete both the - watchpoint and its scope breakpoint at that time. */ - if (bpt->type == bp_watchpoint_scope) - return; - - /* You can't disable permanent breakpoints. */ - if (bpt->enable_state == bp_permanent) - return; - - bpt->enable_state = bp_disabled; - - check_duplicates (bpt); - - if (modify_breakpoint_hook) - modify_breakpoint_hook (bpt); - breakpoint_modify_event (bpt->number); -} - -/* ARGSUSED */ -static void -disable_command (char *args, int from_tty) -{ - register struct breakpoint *bpt; - if (args == 0) - ALL_BREAKPOINTS (bpt) - switch (bpt->type) - { - case bp_none: - warning ("attempted to disable apparently deleted breakpoint #%d?", - bpt->number); - continue; - case bp_breakpoint: - case bp_catch_load: - case bp_catch_unload: - case bp_catch_fork: - case bp_catch_vfork: - case bp_catch_exec: - case bp_catch_catch: - case bp_catch_throw: - case bp_hardware_breakpoint: - case bp_watchpoint: - case bp_hardware_watchpoint: - case bp_read_watchpoint: - case bp_access_watchpoint: - disable_breakpoint (bpt); - default: - continue; - } - else - map_breakpoint_numbers (args, disable_breakpoint); -} - -static void -do_enable_breakpoint (struct breakpoint *bpt, enum bpdisp disposition) -{ - struct frame_info *save_selected_frame = NULL; - int save_selected_frame_level = -1; - int target_resources_ok, other_type_used; - struct value *mark; - - if (bpt->type == bp_hardware_breakpoint) - { - int i; - i = hw_breakpoint_used_count (); - target_resources_ok = - TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint, - i + 1, 0); - if (target_resources_ok == 0) - error ("No hardware breakpoint support in the target."); - else if (target_resources_ok < 0) - error ("Hardware breakpoints used exceeds limit."); - } - - if (bpt->enable_state != bp_permanent) - bpt->enable_state = bp_enabled; - bpt->disposition = disposition; - check_duplicates (bpt); - breakpoints_changed (); - - if (bpt->type == bp_watchpoint || - bpt->type == bp_hardware_watchpoint || - bpt->type == bp_read_watchpoint || - bpt->type == bp_access_watchpoint) - { - if (bpt->exp_valid_block != NULL) - { - struct frame_info *fr = - fr = frame_find_by_id (bpt->watchpoint_frame); - if (fr == NULL) - { - printf_filtered ("\ -Cannot enable watchpoint %d because the block in which its expression\n\ -is valid is not currently in scope.\n", bpt->number); - bpt->enable_state = bp_disabled; - return; - } - - save_selected_frame = selected_frame; - save_selected_frame_level = frame_relative_level (selected_frame); - select_frame (fr); - } - - value_free (bpt->val); - mark = value_mark (); - bpt->val = evaluate_expression (bpt->exp); - release_value (bpt->val); - if (VALUE_LAZY (bpt->val)) - value_fetch_lazy (bpt->val); - - if (bpt->type == bp_hardware_watchpoint || - bpt->type == bp_read_watchpoint || - bpt->type == bp_access_watchpoint) - { - int i = hw_watchpoint_used_count (bpt->type, &other_type_used); - int mem_cnt = can_use_hardware_watchpoint (bpt->val); - - /* Hack around 'unused var' error for some targets here */ - (void) mem_cnt, i; - target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT ( - bpt->type, i + mem_cnt, other_type_used); - /* we can consider of type is bp_hardware_watchpoint, convert to - bp_watchpoint in the following condition */ - if (target_resources_ok < 0) - { - printf_filtered ("\ -Cannot enable watchpoint %d because target watch resources\n\ -have been allocated for other watchpoints.\n", bpt->number); - bpt->enable_state = bp_disabled; - value_free_to_mark (mark); - return; - } - } - - if (save_selected_frame_level >= 0) - select_frame (save_selected_frame); - value_free_to_mark (mark); - } - if (modify_breakpoint_hook) - modify_breakpoint_hook (bpt); - breakpoint_modify_event (bpt->number); -} - -void -enable_breakpoint (struct breakpoint *bpt) -{ - do_enable_breakpoint (bpt, bpt->disposition); -} - -/* The enable command enables the specified breakpoints (or all defined - breakpoints) so they once again become (or continue to be) effective - in stopping the inferior. */ - -/* ARGSUSED */ -static void -enable_command (char *args, int from_tty) -{ - register struct breakpoint *bpt; - if (args == 0) - ALL_BREAKPOINTS (bpt) - switch (bpt->type) - { - case bp_none: - warning ("attempted to enable apparently deleted breakpoint #%d?", - bpt->number); - continue; - case bp_breakpoint: - case bp_catch_load: - case bp_catch_unload: - case bp_catch_fork: - case bp_catch_vfork: - case bp_catch_exec: - case bp_catch_catch: - case bp_catch_throw: - case bp_hardware_breakpoint: - case bp_watchpoint: - case bp_hardware_watchpoint: - case bp_read_watchpoint: - case bp_access_watchpoint: - enable_breakpoint (bpt); - default: - continue; - } - else - map_breakpoint_numbers (args, enable_breakpoint); -} - -static void -enable_once_breakpoint (struct breakpoint *bpt) -{ - do_enable_breakpoint (bpt, disp_disable); -} - -/* ARGSUSED */ -static void -enable_once_command (char *args, int from_tty) -{ - map_breakpoint_numbers (args, enable_once_breakpoint); -} - -static void -enable_delete_breakpoint (struct breakpoint *bpt) -{ - do_enable_breakpoint (bpt, disp_del); -} - -/* ARGSUSED */ -static void -enable_delete_command (char *args, int from_tty) -{ - map_breakpoint_numbers (args, enable_delete_breakpoint); -} - -/* Use default_breakpoint_'s, or nothing if they aren't valid. */ - -struct symtabs_and_lines -decode_line_spec_1 (char *string, int funfirstline) -{ - struct symtabs_and_lines sals; - if (string == 0) - error ("Empty line specification."); - if (default_breakpoint_valid) - sals = decode_line_1 (&string, funfirstline, - default_breakpoint_symtab, - default_breakpoint_line, - (char ***) NULL); - else - sals = decode_line_1 (&string, funfirstline, - (struct symtab *) NULL, 0, (char ***) NULL); - if (*string) - error ("Junk at end of line specification: %s", string); - return sals; -} - -void -_initialize_breakpoint (void) -{ - struct cmd_list_element *c; - - breakpoint_chain = 0; - /* Don't bother to call set_breakpoint_count. $bpnum isn't useful - before a breakpoint is set. */ - breakpoint_count = 0; - - add_com ("ignore", class_breakpoint, ignore_command, - "Set ignore-count of breakpoint number N to COUNT.\n\ -Usage is `ignore N COUNT'."); - if (xdb_commands) - add_com_alias ("bc", "ignore", class_breakpoint, 1); - - add_com ("commands", class_breakpoint, commands_command, - "Set commands to be executed when a breakpoint is hit.\n\ -Give breakpoint number as argument after \"commands\".\n\ -With no argument, the targeted breakpoint is the last one set.\n\ -The commands themselves follow starting on the next line.\n\ -Type a line containing \"end\" to indicate the end of them.\n\ -Give \"silent\" as the first line to make the breakpoint silent;\n\ -then no output is printed when it is hit, except what the commands print."); - - add_com ("condition", class_breakpoint, condition_command, - "Specify breakpoint number N to break only if COND is true.\n\ -Usage is `condition N COND', where N is an integer and COND is an\n\ -expression to be evaluated whenever breakpoint N is reached."); - - c = add_com ("tbreak", class_breakpoint, tbreak_command, - "Set a temporary breakpoint. Args like \"break\" command.\n\ -Like \"break\" except the breakpoint is only temporary,\n\ -so it will be deleted when hit. Equivalent to \"break\" followed\n\ -by using \"enable delete\" on the breakpoint number."); - set_cmd_completer (c, location_completer); - - c = add_com ("hbreak", class_breakpoint, hbreak_command, - "Set a hardware assisted breakpoint. Args like \"break\" command.\n\ -Like \"break\" except the breakpoint requires hardware support,\n\ -some target hardware may not have this support."); - set_cmd_completer (c, location_completer); - - c = add_com ("thbreak", class_breakpoint, thbreak_command, - "Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\ -Like \"hbreak\" except the breakpoint is only temporary,\n\ -so it will be deleted when hit."); - set_cmd_completer (c, location_completer); - - add_prefix_cmd ("enable", class_breakpoint, enable_command, - "Enable some breakpoints.\n\ -Give breakpoint numbers (separated by spaces) as arguments.\n\ -With no subcommand, breakpoints are enabled until you command otherwise.\n\ -This is used to cancel the effect of the \"disable\" command.\n\ -With a subcommand you can enable temporarily.", - &enablelist, "enable ", 1, &cmdlist); - if (xdb_commands) - add_com ("ab", class_breakpoint, enable_command, - "Enable some breakpoints.\n\ -Give breakpoint numbers (separated by spaces) as arguments.\n\ -With no subcommand, breakpoints are enabled until you command otherwise.\n\ -This is used to cancel the effect of the \"disable\" command.\n\ -With a subcommand you can enable temporarily."); - - add_com_alias ("en", "enable", class_breakpoint, 1); - - add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, - "Enable some breakpoints.\n\ -Give breakpoint numbers (separated by spaces) as arguments.\n\ -This is used to cancel the effect of the \"disable\" command.\n\ -May be abbreviated to simply \"enable\".\n", - &enablebreaklist, "enable breakpoints ", 1, &enablelist); - - add_cmd ("once", no_class, enable_once_command, - "Enable breakpoints for one hit. Give breakpoint numbers.\n\ -If a breakpoint is hit while enabled in this fashion, it becomes disabled.", - &enablebreaklist); - - add_cmd ("delete", no_class, enable_delete_command, - "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ -If a breakpoint is hit while enabled in this fashion, it is deleted.", - &enablebreaklist); - - add_cmd ("delete", no_class, enable_delete_command, - "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ -If a breakpoint is hit while enabled in this fashion, it is deleted.", - &enablelist); - - add_cmd ("once", no_class, enable_once_command, - "Enable breakpoints for one hit. Give breakpoint numbers.\n\ -If a breakpoint is hit while enabled in this fashion, it becomes disabled.", - &enablelist); - - add_prefix_cmd ("disable", class_breakpoint, disable_command, - "Disable some breakpoints.\n\ -Arguments are breakpoint numbers with spaces in between.\n\ -To disable all breakpoints, give no argument.\n\ -A disabled breakpoint is not forgotten, but has no effect until reenabled.", - &disablelist, "disable ", 1, &cmdlist); - add_com_alias ("dis", "disable", class_breakpoint, 1); - add_com_alias ("disa", "disable", class_breakpoint, 1); - if (xdb_commands) - add_com ("sb", class_breakpoint, disable_command, - "Disable some breakpoints.\n\ -Arguments are breakpoint numbers with spaces in between.\n\ -To disable all breakpoints, give no argument.\n\ -A disabled breakpoint is not forgotten, but has no effect until reenabled."); - - add_cmd ("breakpoints", class_alias, disable_command, - "Disable some breakpoints.\n\ -Arguments are breakpoint numbers with spaces in between.\n\ -To disable all breakpoints, give no argument.\n\ -A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ -This command may be abbreviated \"disable\".", - &disablelist); - - add_prefix_cmd ("delete", class_breakpoint, delete_command, - "Delete some breakpoints or auto-display expressions.\n\ -Arguments are breakpoint numbers with spaces in between.\n\ -To delete all breakpoints, give no argument.\n\ -\n\ -Also a prefix command for deletion of other GDB objects.\n\ -The \"unset\" command is also an alias for \"delete\".", - &deletelist, "delete ", 1, &cmdlist); - add_com_alias ("d", "delete", class_breakpoint, 1); - if (xdb_commands) - add_com ("db", class_breakpoint, delete_command, - "Delete some breakpoints.\n\ -Arguments are breakpoint numbers with spaces in between.\n\ -To delete all breakpoints, give no argument.\n"); - - add_cmd ("breakpoints", class_alias, delete_command, - "Delete some breakpoints or auto-display expressions.\n\ -Arguments are breakpoint numbers with spaces in between.\n\ -To delete all breakpoints, give no argument.\n\ -This command may be abbreviated \"delete\".", - &deletelist); - - add_com ("clear", class_breakpoint, clear_command, - concat ("Clear breakpoint at specified line or function.\n\ -Argument may be line number, function name, or \"*\" and an address.\n\ -If line number is specified, all breakpoints in that line are cleared.\n\ -If function is specified, breakpoints at beginning of function are cleared.\n\ -If an address is specified, breakpoints at that address are cleared.\n\n", - "With no argument, clears all breakpoints in the line that the selected frame\n\ -is executing in.\n\ -\n\ -See also the \"delete\" command which clears breakpoints by number.", NULL)); - - c = add_com ("break", class_breakpoint, break_command, - concat ("Set breakpoint at specified line or function.\n\ -Argument may be line number, function name, or \"*\" and an address.\n\ -If line number is specified, break at start of code for that line.\n\ -If function is specified, break at start of code for that function.\n\ -If an address is specified, break at that exact address.\n", - "With no arg, uses current execution address of selected stack frame.\n\ -This is useful for breaking on return to a stack frame.\n\ -\n\ -Multiple breakpoints at one place are permitted, and useful if conditional.\n\ -\n\ -Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL)); - set_cmd_completer (c, location_completer); - - add_com_alias ("b", "break", class_run, 1); - add_com_alias ("br", "break", class_run, 1); - add_com_alias ("bre", "break", class_run, 1); - add_com_alias ("brea", "break", class_run, 1); - - if (xdb_commands) - { - add_com_alias ("ba", "break", class_breakpoint, 1); - add_com_alias ("bu", "ubreak", class_breakpoint, 1); - } - - if (dbx_commands) - { - add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command, - "Break in function/address or break at a line in the current file.", - &stoplist, "stop ", 1, &cmdlist); - add_cmd ("in", class_breakpoint, stopin_command, - "Break in function or address.\n", &stoplist); - add_cmd ("at", class_breakpoint, stopat_command, - "Break at a line in the current file.\n", &stoplist); - add_com ("status", class_info, breakpoints_info, - concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ -The \"Type\" column indicates one of:\n\ -\tbreakpoint - normal breakpoint\n\ -\twatchpoint - watchpoint\n\ -The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ -the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ -breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ -address and file/line number respectively.\n\n", - "Convenience variable \"$_\" and default examine address for \"x\"\n\ -are set to the address of the last breakpoint listed.\n\n\ -Convenience variable \"$bpnum\" contains the number of the last\n\ -breakpoint set.", NULL)); - } - - add_info ("breakpoints", breakpoints_info, - concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ -The \"Type\" column indicates one of:\n\ -\tbreakpoint - normal breakpoint\n\ -\twatchpoint - watchpoint\n\ -The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ -the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ -breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ -address and file/line number respectively.\n\n", - "Convenience variable \"$_\" and default examine address for \"x\"\n\ -are set to the address of the last breakpoint listed.\n\n\ -Convenience variable \"$bpnum\" contains the number of the last\n\ -breakpoint set.", NULL)); - - if (xdb_commands) - add_com ("lb", class_breakpoint, breakpoints_info, - concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ -The \"Type\" column indicates one of:\n\ -\tbreakpoint - normal breakpoint\n\ -\twatchpoint - watchpoint\n\ -The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ -the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ -breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ -address and file/line number respectively.\n\n", - "Convenience variable \"$_\" and default examine address for \"x\"\n\ -are set to the address of the last breakpoint listed.\n\n\ -Convenience variable \"$bpnum\" contains the number of the last\n\ -breakpoint set.", NULL)); - - add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints, - concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\ -The \"Type\" column indicates one of:\n\ -\tbreakpoint - normal breakpoint\n\ -\twatchpoint - watchpoint\n\ -\tlongjmp - internal breakpoint used to step through longjmp()\n\ -\tlongjmp resume - internal breakpoint at the target of longjmp()\n\ -\tuntil - internal breakpoint used by the \"until\" command\n\ -\tfinish - internal breakpoint used by the \"finish\" command\n", - "The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ -the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ -breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ -address and file/line number respectively.\n\n", - "Convenience variable \"$_\" and default examine address for \"x\"\n\ -are set to the address of the last breakpoint listed.\n\n\ -Convenience variable \"$bpnum\" contains the number of the last\n\ -breakpoint set.", NULL), - &maintenanceinfolist); - - add_com ("catch", class_breakpoint, catch_command, - "Set catchpoints to catch events.\n\ -Raised signals may be caught:\n\ -\tcatch signal - all signals\n\ -\tcatch signal <signame> - a particular signal\n\ -Raised exceptions may be caught:\n\ -\tcatch throw - all exceptions, when thrown\n\ -\tcatch throw <exceptname> - a particular exception, when thrown\n\ -\tcatch catch - all exceptions, when caught\n\ -\tcatch catch <exceptname> - a particular exception, when caught\n\ -Thread or process events may be caught:\n\ -\tcatch thread_start - any threads, just after creation\n\ -\tcatch thread_exit - any threads, just before expiration\n\ -\tcatch thread_join - any threads, just after joins\n\ -Process events may be caught:\n\ -\tcatch start - any processes, just after creation\n\ -\tcatch exit - any processes, just before expiration\n\ -\tcatch fork - calls to fork()\n\ -\tcatch vfork - calls to vfork()\n\ -\tcatch exec - calls to exec()\n\ -Dynamically-linked library events may be caught:\n\ -\tcatch load - loads of any library\n\ -\tcatch load <libname> - loads of a particular library\n\ -\tcatch unload - unloads of any library\n\ -\tcatch unload <libname> - unloads of a particular library\n\ -The act of your program's execution stopping may also be caught:\n\ -\tcatch stop\n\n\ -C++ exceptions may be caught:\n\ -\tcatch throw - all exceptions, when thrown\n\ -\tcatch catch - all exceptions, when caught\n\ -\n\ -Do \"help set follow-fork-mode\" for info on debugging your program\n\ -after a fork or vfork is caught.\n\n\ -Do \"help breakpoints\" for info on other commands dealing with breakpoints."); - - add_com ("tcatch", class_breakpoint, tcatch_command, - "Set temporary catchpoints to catch events.\n\ -Args like \"catch\" command.\n\ -Like \"catch\" except the catchpoint is only temporary,\n\ -so it will be deleted when hit. Equivalent to \"catch\" followed\n\ -by using \"enable delete\" on the catchpoint number."); - - c = add_com ("watch", class_breakpoint, watch_command, - "Set a watchpoint for an expression.\n\ -A watchpoint stops execution of your program whenever the value of\n\ -an expression changes."); - set_cmd_completer (c, location_completer); - - c = add_com ("rwatch", class_breakpoint, rwatch_command, - "Set a read watchpoint for an expression.\n\ -A watchpoint stops execution of your program whenever the value of\n\ -an expression is read."); - set_cmd_completer (c, location_completer); - - c = add_com ("awatch", class_breakpoint, awatch_command, - "Set a watchpoint for an expression.\n\ -A watchpoint stops execution of your program whenever the value of\n\ -an expression is either read or written."); - set_cmd_completer (c, location_completer); - - add_info ("watchpoints", breakpoints_info, - "Synonym for ``info breakpoints''."); - - - c = add_set_cmd ("can-use-hw-watchpoints", class_support, var_zinteger, - (char *) &can_use_hw_watchpoints, - "Set debugger's willingness to use watchpoint hardware.\n\ -If zero, gdb will not use hardware for new watchpoints, even if\n\ -such is available. (However, any hardware watchpoints that were\n\ -created before setting this to nonzero, will continue to use watchpoint\n\ -hardware.)", - &setlist); - add_show_from_set (c, &showlist); - - can_use_hw_watchpoints = 1; -} |