diff options
Diffstat (limited to 'gdb/breakpoint.c')
| -rw-r--r-- | gdb/breakpoint.c | 6624 |
1 files changed, 0 insertions, 6624 deletions
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c deleted file mode 100644 index 8ca2916..0000000 --- a/gdb/breakpoint.c +++ /dev/null @@ -1,6624 +0,0 @@ -/* Everything about breakpoints, for GDB. - Copyright 1986, 87, 89, 90, 91, 92, 93, 94, 95, 96, 97, 1998 - 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" - -/* Prototypes for local functions. */ - -static void -catch_command_1 PARAMS ((char *, int, int)); - -static void -enable_delete_command PARAMS ((char *, int)); - -static void -enable_delete_breakpoint PARAMS ((struct breakpoint *)); - -static void -enable_once_command PARAMS ((char *, int)); - -static void -enable_once_breakpoint PARAMS ((struct breakpoint *)); - -static void -disable_command PARAMS ((char *, int)); - -static void -enable_command PARAMS ((char *, int)); - -static void -map_breakpoint_numbers PARAMS ((char *, void (*)(struct breakpoint *))); - -static void -ignore_command PARAMS ((char *, int)); - -static int breakpoint_re_set_one PARAMS ((PTR)); - -static void -clear_command PARAMS ((char *, int)); - -static void -catch_command PARAMS ((char *, int)); - -static void -handle_gnu_4_16_catch_command PARAMS ((char *, int, int)); - -static struct symtabs_and_lines -get_catch_sals PARAMS ((int)); - -static void -watch_command PARAMS ((char *, int)); - -static int -can_use_hardware_watchpoint PARAMS ((struct value *)); - -void -tbreak_command PARAMS ((char *, int)); - -static void -break_command_1 PARAMS ((char *, int, int)); - -static void -mention PARAMS ((struct breakpoint *)); - -struct breakpoint * -set_raw_breakpoint PARAMS ((struct symtab_and_line)); - -static void -check_duplicates PARAMS ((CORE_ADDR, asection *)); - -static void -describe_other_breakpoints PARAMS ((CORE_ADDR, asection *)); - -static void -breakpoints_info PARAMS ((char *, int)); - -static void -breakpoint_1 PARAMS ((int, int)); - -static bpstat -bpstat_alloc PARAMS ((struct breakpoint *, bpstat)); - -static int breakpoint_cond_eval PARAMS ((PTR)); - -static void -cleanup_executing_breakpoints PARAMS ((PTR)); - -static void -commands_command PARAMS ((char *, int)); - -static void -condition_command PARAMS ((char *, int)); - -static int -get_number PARAMS ((char **)); - -void -set_breakpoint_count PARAMS ((int)); - -#if 0 -static struct breakpoint * -create_temp_exception_breakpoint PARAMS ((CORE_ADDR)); -#endif - -typedef enum { - mark_inserted, - mark_uninserted, -} insertion_state_t; - -static int -remove_breakpoint PARAMS ((struct breakpoint *, insertion_state_t)); - -static int print_it_normal PARAMS ((bpstat)); - -typedef struct { - enum exception_event_kind kind; - int enable; -} args_for_catchpoint_enable; - -static int watchpoint_check PARAMS ((PTR)); - -static int cover_target_enable_exception_callback PARAMS ((PTR)); - -static int print_it_done PARAMS ((bpstat)); - -static int print_it_noop PARAMS ((bpstat)); - -static void maintenance_info_breakpoints PARAMS ((char *, int)); - -#ifdef GET_LONGJMP_TARGET -static void create_longjmp_breakpoint PARAMS ((char *)); -#endif - -static int hw_breakpoint_used_count PARAMS ((void)); - -static int hw_watchpoint_used_count PARAMS ((enum bptype, int *)); - -static void hbreak_command PARAMS ((char *, int)); - -static void thbreak_command PARAMS ((char *, int)); - -static void watch_command_1 PARAMS ((char *, int, int)); - -static void rwatch_command PARAMS ((char *, int)); - -static void awatch_command PARAMS ((char *, int)); - -static void do_enable_breakpoint PARAMS ((struct breakpoint *, enum bpdisp)); - -/* Prototypes for exported functions. */ - -static void -awatch_command PARAMS ((char *, int)); - -static void -do_enable_breakpoint PARAMS ((struct breakpoint *, enum bpdisp)); - -/* If FALSE, gdb will not use hardware support for watchpoints, even - if such is available. */ -static int can_use_hw_watchpoints; - -void delete_command PARAMS ((char *, int)); - -void _initialize_breakpoint PARAMS ((void)); - -void set_breakpoint_count PARAMS ((int)); - -extern int addressprint; /* Print machine addresses? */ - -#if defined (GET_LONGJMP_TARGET) || defined (SOLIB_ADD) -static int internal_breakpoint_number = -1; -#endif - -/* Are we executing breakpoint commands? */ -static int executing_breakpoint_commands; - -/* 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; - - -/* Set breakpoint count to NUM. */ - -void -set_breakpoint_count (num) - 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 () -{ - 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 "$" followed by the name - of a convenience variable. Making it an expression wouldn't work well - for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */ -static int -get_number (pp) - char **pp; -{ - int retval; - char *p = *pp; - - if (p == NULL) - /* Empty line means refer to the last breakpoint. */ - return breakpoint_count; - else if (*p == '$') - { - /* Make a copy of the name, so we can null-terminate it - to pass to lookup_internalvar(). */ - char *varname; - char *start = ++p; - value_ptr 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) - error ( -"Convenience variables used to specify breakpoints must have integer values." - ); - retval = (int) value_as_long (val); - } - else - { - if (*p == '-') - ++p; - while (*p >= '0' && *p <= '9') - ++p; - if (p == *pp) - /* There is no number here. (e.g. "cond a == b"). */ - error_no_arg ("breakpoint number"); - retval = atoi (*pp); - } - if (!(isspace (*p) || *p == '\0')) - error ("breakpoint number expected"); - while (isspace (*p)) - p++; - *pp = p; - return retval; -} - -/* condition N EXP -- set break condition of breakpoint N to EXP. */ - -static void -condition_command (arg, from_tty) - 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); - - ALL_BREAKPOINTS (b) - if (b->number == bnum) - { - if (b->cond) - { - free ((PTR)b->cond); - b->cond = 0; - } - if (b->cond_string != NULL) - free ((PTR)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 (); - return; - } - - error ("No breakpoint number %d.", bnum); -} - -/* ARGSUSED */ -static void -commands_command (arg, from_tty) - 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 (); - 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 (memaddr, myaddr, len) - 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 ("attempted to read through apparently deleted breakpoint #%d?\n", 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 () -{ - register struct breakpoint *b, *temp; - int val = 0; - int disabled_breaks = 0; - - static char message1[] = "Error inserting catchpoint %d:\n"; - static char message[sizeof (message1) + 30]; - - - ALL_BREAKPOINTS_SAFE (b, temp) - { - 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 != disabled - && b->enable != shlib_disabled - && b->enable != call_disabled - && ! b->inserted - && ! b->duplicate) - { - if (b->type == bp_hardware_breakpoint) - val = target_insert_hw_breakpoint(b->address, b->shadow_contents); - else - { - /* Check to see if breakpoint is in an overlay section; - if so, we should set the breakpoint at the LMA address. - Only if the section is currently mapped should we ALSO - set a break at the VMA address. */ - if (overlay_debugging && b->section && - section_is_overlay (b->section)) - { - CORE_ADDR addr; - - addr = overlay_unmapped_address (b->address, b->section); - val = target_insert_breakpoint (addr, b->shadow_contents); - /* This would be the time to check val, to see if the - breakpoint write to the load address succeeded. - However, this might be an ordinary occurrance, eg. if - the unmapped overlay is in ROM. */ - val = 0; /* in case unmapped address failed */ - if (section_is_mapped (b->section)) - val = target_insert_breakpoint (b->address, - b->shadow_contents); - } - else /* ordinary (non-overlay) address */ - val = target_insert_breakpoint(b->address, b->shadow_contents); - } - 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 = shlib_disabled; - if (!disabled_breaks) - { - target_terminal_ours_for_output (); - fprintf_unfiltered (gdb_stderr, - "Cannot insert breakpoint %d:\n", b->number); - printf_filtered ("Temporarily disabling shared library breakpoints:\n"); - } - disabled_breaks = 1; - printf_filtered ("%d ", b->number); - } - else -#endif - { - target_terminal_ours_for_output (); - fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number); -#ifdef ONE_PROCESS_WRITETEXT - fprintf_unfiltered (gdb_stderr, - "The same program may be running in another process.\n"); -#endif - memory_error (val, b->address); /* which bombs us out */ - } - } - else - b->inserted = 1; - } - else if (ep_is_exception_catchpoint (b) - && b->enable != disabled - && b->enable != shlib_disabled - && b->enable != 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. */ - sprintf (message, message1, b->number); /* Format possible error message */ - - val = target_insert_breakpoint(b->address, b->shadow_contents); - if (val) - { - /* Couldn't set breakpoint for some reason */ - target_terminal_ours_for_output (); - fprintf_unfiltered (gdb_stderr, - "Cannot insert catchpoint %d; disabling it\n", b->number); - b->enable = 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 = 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 */ - target_terminal_ours_for_output (); - fprintf_unfiltered (gdb_stderr, "Cannot insert catchpoint %d; disabling it\n", b->number); - b->enable = disabled; - } - } - } - - else if ((b->type == bp_hardware_watchpoint || - b->type == bp_read_watchpoint || - b->type == bp_access_watchpoint) - && b->enable == enabled - && ! b->inserted - && ! b->duplicate) - { - struct frame_info *saved_frame; - int saved_level, within_current_scope; - value_ptr mark = value_mark (); - value_ptr 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 = selected_frame_level; - - /* Determine if the watchpoint is within scope. */ - if (b->exp_valid_block == NULL) - within_current_scope = 1; - else - { - struct frame_info *fi; - - /* There might be no current frame at this moment if we are - resuming from a step over a breakpoint. - Set up current frame before trying to find the watchpoint - frame. */ - get_current_frame (); - fi = find_frame_addr_in_frame_chain (b->watchpoint_frame); - within_current_scope = (fi != NULL); - if (within_current_scope) - select_frame (fi, -1); - } - - if (within_current_scope) - { - /* Evaluate the expression and cut the chain of values - produced off from the value chain. */ - v = evaluate_expression (b->exp); - 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, then we must watch it. */ - if (v->lval == lval_memory) - { - int addr, len, type; - - addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); - len = TYPE_LENGTH (VALUE_TYPE (v)); - type = 0; - if (b->type == bp_read_watchpoint) - type = 1; - else if (b->type == bp_access_watchpoint) - type = 2; - - val = target_insert_watchpoint (addr, len, type); - if (val == -1) - { - b->inserted = 0; - break; - } - val = 0; - } - } - /* Failure to insert a watchpoint on any memory value in the - value chain brings us here. */ - if (!b->inserted) - warning ("Hardware watchpoint %d: Could not insert watchpoint\n", - b->number); - } - else - { - printf_filtered ("\ -Hardware watchpoint %d deleted because the program has left the block in\n\ -which its expression is valid.\n", b->number); - if (b->related_breakpoint) - b->related_breakpoint->disposition = del_at_next_stop; - b->disposition = del_at_next_stop; - } - - /* Restore the frame and level. */ - if ((saved_frame != selected_frame) || - (saved_level != selected_frame_level)) - select_and_print_frame (saved_frame, saved_level); - } - else if ((b->type == bp_catch_fork - || b->type == bp_catch_vfork - || b->type == bp_catch_exec) - && b->enable == enabled - && ! b->inserted - && ! b->duplicate) - { - val = -1; - switch (b->type) - { - case bp_catch_fork : - val = target_insert_fork_catchpoint (inferior_pid); - break; - case bp_catch_vfork : - val = target_insert_vfork_catchpoint (inferior_pid); - break; - case bp_catch_exec : - val = target_insert_exec_catchpoint (inferior_pid); - break; - } - if (val < 0) - { - target_terminal_ours_for_output (); - fprintf_unfiltered (gdb_stderr, "Cannot insert catchpoint %d:\n", b->number); - } - else - b->inserted = 1; - } - } - if (disabled_breaks) - printf_filtered ("\n"); - - return val; -} - - -int -remove_breakpoints () -{ - 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 -reattach_breakpoints (pid) - int pid; -{ - register struct breakpoint *b; - int val; - int saved_inferior_pid = inferior_pid; - - inferior_pid = pid; /* Because remove_breakpoint will use this global. */ - 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) - { - inferior_pid = saved_inferior_pid; - return val; - } - } - } - inferior_pid = saved_inferior_pid; - return 0; -} - -void -update_breakpoints_after_exec () -{ - 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; - } - - /* 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. */ - 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. */ - b->address = (CORE_ADDR) NULL; - } -} - -int -detach_breakpoints (pid) - int pid; -{ - register struct breakpoint *b; - int val; - int saved_inferior_pid = inferior_pid; - - if (pid == inferior_pid) - error ("Cannot detach breakpoints of inferior_pid"); - - inferior_pid = pid; /* Because remove_breakpoint will use this global. */ - ALL_BREAKPOINTS (b) - { - if (b->inserted) - { - val = remove_breakpoint (b, mark_inserted); - if (val != 0) - { - inferior_pid = saved_inferior_pid; - return val; - } - } - } - inferior_pid = saved_inferior_pid; - return 0; -} - -static int -remove_breakpoint (b, is) - struct breakpoint *b; - insertion_state_t is; -{ - int val; - - if (b->type == bp_none) - warning ("attempted to remove apparently deleted breakpoint #%d?\n", 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) - - { - if (b->type == bp_hardware_breakpoint) - val = target_remove_hw_breakpoint(b->address, b->shadow_contents); - else - { - /* Check to see if breakpoint is in an overlay section; - if so, we should remove the breakpoint at the LMA address. - If that is not equal to the raw address, then we should - presumable remove the breakpoint there as well. */ - if (overlay_debugging && b->section && - section_is_overlay (b->section)) - { - CORE_ADDR addr; - - addr = overlay_unmapped_address (b->address, b->section); - val = target_remove_breakpoint (addr, b->shadow_contents); - /* This would be the time to check val, to see if the - shadow breakpoint write to the load address succeeded. - However, this might be an ordinary occurrance, eg. if - the unmapped overlay is in ROM. */ - val = 0; /* in case unmapped address failed */ - if (section_is_mapped (b->section)) - val = target_remove_breakpoint (b->address, - b->shadow_contents); - } - else /* ordinary (non-overlay) address */ - val = target_remove_breakpoint(b->address, b->shadow_contents); - } - 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 == enabled - && ! b->duplicate) - { - value_ptr v, 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 (v->lval == lval_memory) - { - int addr, len, type; - - addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); - len = TYPE_LENGTH (VALUE_TYPE (v)); - type = 0; - if (b->type == bp_read_watchpoint) - type = 1; - else if (b->type == bp_access_watchpoint) - type = 2; - - 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 ("Hardware watchpoint %d: Could not remove watchpoint\n", - 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 == enabled - && ! b->duplicate) - { - val = -1; - switch (b->type) - { - case bp_catch_fork: - val = target_remove_fork_catchpoint (inferior_pid); - break; - case bp_catch_vfork : - val = target_remove_vfork_catchpoint (inferior_pid); - break; - case bp_catch_exec : - val = target_remove_exec_catchpoint (inferior_pid); - break; - } - if (val) - return val; - b->inserted = (is == mark_inserted); - } - else if ((b->type == bp_catch_catch || - b->type == bp_catch_throw) - && b->enable == 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 == 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 () -{ - 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 (context) - 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); - 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, you must reinsert them explicitly"); - warning_needed = 0; - } -} - -/* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC. - When continuing from a location with a breakpoint, - we actually single step once before calling insert_breakpoints. */ - -int -breakpoint_here_p (pc) - CORE_ADDR pc; -{ - register struct breakpoint *b; - - ALL_BREAKPOINTS (b) - if (b->enable == enabled - && b->enable != shlib_disabled - && b->enable != call_disabled - && 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 - return 1; - } - - return 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 (pc) - 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 (frame) - struct frame_info *frame; -{ -#ifdef CALL_DUMMY -#ifdef USE_GENERIC_DUMMY_FRAMES - return generic_pc_in_call_dummy (frame->pc, frame->frame); -#else - struct breakpoint *b; - - ALL_BREAKPOINTS (b) - { - static ULONGEST dummy[] = CALL_DUMMY; - - 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 (dummy) / sizeof (LONGEST) * REGISTER_SIZE)) - && frame->pc <= b->address) - return 1; - } -#endif /* GENERIC_DUMMY_FRAMES */ -#endif /* CALL_DUMMY */ - return 0; -} - -/* breakpoint_match_thread (PC, PID) returns true if the breakpoint at PC - is valid for process/thread PID. */ - -int -breakpoint_thread_match (pc, pid) - CORE_ADDR pc; - int pid; -{ - struct breakpoint *b; - int thread; - - thread = pid_to_thread_id (pid); - - ALL_BREAKPOINTS (b) - if (b->enable != disabled - && b->enable != shlib_disabled - && b->enable != 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 (ep) - 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 (ep) - struct breakpoint * ep; -{ - return - (ep->type == bp_catch_load) - || (ep->type == bp_catch_unload) - ; -} - -int -ep_is_exception_catchpoint (ep) - 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 (bsp) - 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 ((PTR)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 (bs) - 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(bsp, 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 (bsp) - bpstat bsp; -{ - if (bsp == NULL) - error ("Internal error (bpstat_find_step_resume_breakpoint)"); - - for (; bsp != NULL; bsp = bsp->next) - { - if ((bsp->breakpoint_at != NULL) && - (bsp->breakpoint_at->type == bp_step_resume)) - 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 (bsp) - 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 (bs) - bpstat bs; -{ - for (; bs != NULL; bs = bs->next) - { - bs->commands = NULL; - 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 (ignore) - 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 (bsp) - 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 - bs->commands = NULL; - } - - executing_breakpoint_commands = 0; - discard_cleanups (old_chain); -} - -/* This is the normal print_it 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 functions. - - Current scheme: When we stop, bpstat_print() is called. - It loops through the bpstat list of things causing this stop, - calling the print_it function for each one. The default - print_it function, used for breakpoints, is print_it_normal(). - (Also see print_it_noop() and print_it_done()). - - Return values from this routine (used by bpstat_print() to - decide what to do): - 1: Means we printed something, and we do *not* desire that - something to be followed by a location. - 0: Means we printed something, and we *do* desire that - something to be followed by a location. - -1: Means we printed nothing. */ - -static int -print_it_normal (bs) - bpstat bs; -{ - /* bs->breakpoint_at can be NULL if it was a momentary breakpoint - which has since been deleted. */ - if (bs->breakpoint_at == NULL - || (bs->breakpoint_at->type != bp_breakpoint - && bs->breakpoint_at->type != bp_catch_load - && bs->breakpoint_at->type != bp_catch_unload - && bs->breakpoint_at->type != bp_catch_fork - && bs->breakpoint_at->type != bp_catch_vfork - && bs->breakpoint_at->type != bp_catch_exec - && bs->breakpoint_at->type != bp_catch_catch - && bs->breakpoint_at->type != bp_catch_throw - && bs->breakpoint_at->type != bp_hardware_breakpoint - && bs->breakpoint_at->type != bp_watchpoint - && bs->breakpoint_at->type != bp_read_watchpoint - && bs->breakpoint_at->type != bp_access_watchpoint - && bs->breakpoint_at->type != bp_hardware_watchpoint)) - return -1; - - if (ep_is_shlib_catchpoint (bs->breakpoint_at)) - { - annotate_catchpoint (bs->breakpoint_at->number); - printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); - if (bs->breakpoint_at->type == bp_catch_load) - printf_filtered ("loaded"); - else if (bs->breakpoint_at->type == bp_catch_unload) - printf_filtered ("unloaded"); - printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname); - return 0; - } - else if (bs->breakpoint_at->type == bp_catch_fork || - bs->breakpoint_at->type == bp_catch_vfork) - { - annotate_catchpoint (bs->breakpoint_at->number); - printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number); - if (bs->breakpoint_at->type == bp_catch_fork) - printf_filtered ("forked"); - else if (bs->breakpoint_at->type == bp_catch_vfork) - printf_filtered ("vforked"); - printf_filtered (" process %d), ", bs->breakpoint_at->forked_inferior_pid); - return 0; - } - else if (bs->breakpoint_at->type == 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 0; - } - else if (bs->breakpoint_at->type == 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"); - return 1; /* don't bother to print location frame info */ - } - else - { - return -1; /* really throw, some other bpstat will handle it */ - } - } - else if (bs->breakpoint_at->type == 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"); - return 1; /* don't bother to print location frame info */ - } - else - { - return -1; /* really catch, some other bpstat willhandle it */ - } - } - - else if (bs->breakpoint_at->type == bp_breakpoint || - bs->breakpoint_at->type == bp_hardware_breakpoint) - { - /* I think the user probably only wants to see one breakpoint - number, not all of them. */ - annotate_breakpoint (bs->breakpoint_at->number); - printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number); - return 0; - } - else if ((bs->old_val != NULL) && - (bs->breakpoint_at->type == bp_watchpoint || - bs->breakpoint_at->type == bp_access_watchpoint || - bs->breakpoint_at->type == bp_hardware_watchpoint)) - { - annotate_watchpoint (bs->breakpoint_at->number); - mention (bs->breakpoint_at); - printf_filtered ("\nOld value = "); - value_print (bs->old_val, gdb_stdout, 0, Val_pretty_default); - printf_filtered ("\nNew value = "); - value_print (bs->breakpoint_at->val, gdb_stdout, 0, - Val_pretty_default); - printf_filtered ("\n"); - value_free (bs->old_val); - bs->old_val = NULL; - /* More than one watchpoint may have been triggered. */ - return -1; - } - else if (bs->breakpoint_at->type == bp_access_watchpoint || - bs->breakpoint_at->type == bp_read_watchpoint) - { - mention (bs->breakpoint_at); - printf_filtered ("\nValue = "); - value_print (bs->breakpoint_at->val, gdb_stdout, 0, - Val_pretty_default); - printf_filtered ("\n"); - return -1; - } - /* We can't deal with it. Maybe another member of the bpstat chain can. */ - return -1; -} - -/* 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 "print_it" routine(s) associated - with these eventpoints. This will print (for example) - the "Breakpoint n," part of the output. - The return value of this routine is one of: - - -1: Means we printed nothing - 0: Means we printed something, and expect subsequent - code to print the location. An example is - "Breakpoint 1, " which should be followed by - the location. - 1 : 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. */ - -int -bpstat_print (bs) - bpstat bs; -{ - int val; - - if (bs == NULL) - return -1; - - val = (*bs->print_it) (bs); - if (val >= 0) - return 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). */ - if (bs->next) - return bpstat_print (bs->next); - - /* We reached the end of the chain without printing anything. */ - return -1; -} - -/* 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 (exp) - PTR exp; -{ - value_ptr 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 (b, cbs) - register 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 (p) - 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 = find_frame_addr_in_frame_chain (b->watchpoint_frame); - within_current_scope = (fr != NULL); - 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, -1); - } - - 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. */ - - value_ptr mark = value_mark (); - value_ptr 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). */ - printf_filtered ("\ -Watchpoint %d deleted because the program has left the block in\n\ -which its expression is valid.\n", bs->breakpoint_at->number); - if (b->related_breakpoint) - b->related_breakpoint->disposition = del_at_next_stop; - b->disposition = del_at_next_stop; - - return WP_DELETED; - } -} - -/* This is used when everything which needs to be printed has - already been printed. But we still want to print the frame. */ - -/* Background: When we stop, bpstat_print() is called. - It loops through the bpstat list of things causing this stop, - calling the print_it function for each one. The default - print_it function, used for breakpoints, is print_it_normal(). - Also see print_it_noop() and print_it_done() are the other - two possibilities. See comments in bpstat_print() and - in header of print_it_normal() for more detail. */ - -static int -print_it_done (bs) - bpstat bs; -{ - return 0; -} - -/* This is used when nothing should be printed for this bpstat entry. */ -/* Background: When we stop, bpstat_print() is called. - It loops through the bpstat list of things causing this stop, - calling the print_it function for each one. The default - print_it function, used for breakpoints, is print_it_normal(). - Also see print_it_noop() and print_it_done() are the other - two possibilities. See comments in bpstat_print() and - in header of print_it_normal() for more detail. */ - -static int -print_it_noop (bs) - bpstat bs; -{ - return -1; -} - -/* 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_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 (pc, not_a_breakpoint) - CORE_ADDR *pc; - int not_a_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. */ - bp_addr = *pc - DECR_PC_AFTER_BREAK; - - ALL_BREAKPOINTS_SAFE (b, temp) - { - if (b->enable == disabled - || b->enable == shlib_disabled - || b->enable == 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 or */ - (overlay_debugging && /* overlay doesn't match */ - section_is_overlay (b->section) && - !section_is_mapped (b->section))) - continue; - - if (b->type == bp_hardware_breakpoint - && b->address != (bp_addr - DECR_PC_AFTER_HW_BREAK)) - continue; - - if (b->type != bp_watchpoint - && b->type != bp_hardware_watchpoint - && b->type != bp_read_watchpoint - && b->type != bp_access_watchpoint - && not_a_breakpoint) - 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(inferior_pid) - || ((b->dll_pathname != NULL) - && (strcmp (b->dll_pathname, SOLIB_LOADED_LIBRARY_PATHNAME(inferior_pid)) != 0))) -#endif - ) - continue; - - if ((b->type == bp_catch_unload) -#if defined(SOLIB_HAVE_UNLOAD_EVENT) - && (!SOLIB_HAVE_UNLOAD_EVENT(inferior_pid) - || ((b->dll_pathname != NULL) - && (strcmp (b->dll_pathname, SOLIB_UNLOADED_LIBRARY_PATHNAME(inferior_pid)) != 0))) -#endif - ) - continue; - - if ((b->type == bp_catch_fork) - && ! target_has_forked (inferior_pid, &b->forked_inferior_pid)) - continue; - - if ((b->type == bp_catch_vfork) - && ! target_has_vforked (inferior_pid, &b->forked_inferior_pid)) - continue; - - if ((b->type == bp_catch_exec) - && ! target_has_execd (inferior_pid, &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. */ - 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; - /* Don't consider this a hit. */ - --(b->hit_count); - 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 = del_at_next_stop; - b->disposition = 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; - value_ptr v; - int found = 0; - - addr = target_stopped_data_address(); - if (addr == 0) continue; - for (v = b->val_chain; v; v = v->next) - { - if (v->lval == lval_memory) - { - CORE_ADDR vaddr; - - vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v); - if (addr == vaddr) - 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: - 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 = del_at_next_stop; - b->disposition = del_at_next_stop; - /* We've already printed what needs to be printed. */ - bs->print_it = print_it_done; - break; - } - } - else - { - /* By definition, an encountered breakpoint is a triggered - breakpoint. */ - ++(b->hit_count); - - if (DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs) - real_breakpoint = 1; - } - - if (b->frame && b->frame != (get_current_frame ())->frame && - (b->type == bp_step_resume && - (INNER_THAN (get_current_frame ()->frame, b->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 (), 0); - 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--; - bs->stop = 0; - } - else - { - /* We will stop here */ - if (b->disposition == disable) - b->enable = disabled; - bs->commands = 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 ((DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs) && bs) - { - if (real_breakpoint) - { - *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 (bs) - 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. */ - - /* step_resume entries: a step resume breakpoint overrides another - breakpoint of signal handling (see comment in wait_for_inferior - at first 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, err, 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_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 () -{ - struct breakpoint *b; - ALL_BREAKPOINTS (b) - if (b->enable == enabled && b->type == bp_watchpoint) - return 1; - return 0; -} - -/* Nonzero if there are enabled hardware watchpoints. */ -int -bpstat_have_active_hw_watchpoints () -{ - struct breakpoint *b; - ALL_BREAKPOINTS (b) - if ((b->enable == 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 (ep_list, cp_list) - 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) - free (ep->triggered_dll_pathname); - if (ep->type == bp_catch_load) - dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME (inferior_pid); - else - dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME (inferior_pid); -#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 information on breakpoint number BNUM, or -1 if all. - If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS - is nonzero, process only watchpoints. */ - -typedef struct { - enum bptype type; - char * description; -} ep_type_description_t; - -static void -breakpoint_1 (bnum, allflag) - int bnum; - int allflag; -{ - register struct breakpoint *b; - register struct command_line *l; - register struct symbol *sym; - CORE_ADDR last_addr = (CORE_ADDR)-1; - int found_a_breakpoint = 0; - static ep_type_description_t 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_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[] = "nyn"; - char wrap_indent[80]; - - ALL_BREAKPOINTS (b) - if (bnum == -1 - || bnum == b->number) - { -/* We only print out user settable breakpoints unless the allflag is set. */ - if (!allflag - && 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) - continue; - - if (!found_a_breakpoint++) - { - annotate_breakpoints_headers (); - - annotate_field (0); - printf_filtered ("Num "); - annotate_field (1); - printf_filtered ("Type "); - annotate_field (2); - printf_filtered ("Disp "); - annotate_field (3); - printf_filtered ("Enb "); - if (addressprint) - { - annotate_field (4); - printf_filtered ("Address "); - } - annotate_field (5); - printf_filtered ("What\n"); - - annotate_breakpoints_table (); - } - - annotate_record (); - annotate_field (0); - printf_filtered ("%-3d ", b->number); - annotate_field (1); - if ((int)b->type > (sizeof(bptypes)/sizeof(bptypes[0]))) - error ("bptypes table does not describe type #%d.", (int)b->type); - if ((int)b->type != bptypes[(int)b->type].type) - error ("bptypes table does not describe type #%d?", (int)b->type); - printf_filtered ("%-14s ", bptypes[(int)b->type].description); - annotate_field (2); - printf_filtered ("%-4s ", bpdisps[(int)b->disposition]); - annotate_field (3); - printf_filtered ("%-3c ", bpenables[(int)b->enable]); - - strcpy (wrap_indent, " "); - if (addressprint) - strcat (wrap_indent, " "); - switch (b->type) - { - 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). */ - annotate_field (5); - print_expression (b->exp, gdb_stdout); - 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). */ - annotate_field (5); - if (b->dll_pathname == NULL) - printf_filtered ("<any library> "); - else - printf_filtered ("library \"%s\" ", b->dll_pathname); - 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). */ - annotate_field (5); - if (b->forked_inferior_pid != 0) - printf_filtered ("process %d ", b->forked_inferior_pid); - break; - - 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). */ - annotate_field (5); - if (b->exec_pathname != NULL) - printf_filtered ("program \"%s\" ", b->exec_pathname); - 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). */ - annotate_field (5); - printf_filtered ("exception catch "); - 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). */ - annotate_field (5); - printf_filtered ("exception throw "); - 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: - if (addressprint) - { - annotate_field (4); - /* FIXME-32x64: need a print_address_numeric with - field width */ - printf_filtered - ("%s ", - local_hex_string_custom - ((unsigned long) b->address, "08l")); - } - - annotate_field (5); - - last_addr = b->address; - if (b->source_file) - { - sym = find_pc_sect_function (b->address, b->section); - if (sym) - { - fputs_filtered ("in ", gdb_stdout); - fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout); - wrap_here (wrap_indent); - fputs_filtered (" at ", gdb_stdout); - } - fputs_filtered (b->source_file, gdb_stdout); - printf_filtered (":%d", b->line_number); - } - else - print_address_symbolic (b->address, gdb_stdout, demangle, " "); - break; - } - - if (b->thread != -1) - printf_filtered (" thread %d", b->thread ); - - printf_filtered ("\n"); - - if (b->frame) - { - annotate_field (6); - - printf_filtered ("\tstop only in stack frame at "); - print_address_numeric (b->frame, 1, gdb_stdout); - printf_filtered ("\n"); - } - - if (b->cond) - { - annotate_field (7); - - printf_filtered ("\tstop only if "); - print_expression (b->cond, gdb_stdout); - printf_filtered ("\n"); - } - - if (b->thread != -1) - { - /* FIXME should make an annotation for this */ - printf_filtered ("\tstop only in thread %d\n", b->thread); - } - - if (show_breakpoint_hit_counts && b->hit_count) - { - /* FIXME should make an annotation for this */ - if (ep_is_catchpoint (b)) - printf_filtered ("\tcatchpoint"); - else - printf_filtered ("\tbreakpoint"); - printf_filtered (" already hit %d time%s\n", - b->hit_count, (b->hit_count == 1 ? "" : "s")); - } - - if (b->ignore_count) - { - annotate_field (8); - - printf_filtered ("\tignore next %d hits\n", b->ignore_count); - } - - if ((l = b->commands)) - { - annotate_field (9); - - while (l) - { - print_command_line (l, 4); - l = l->next; - } - } - } - - if (!found_a_breakpoint) - { - if (bnum == -1) - printf_filtered ("No breakpoints or watchpoints.\n"); - else - printf_filtered ("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); - - annotate_breakpoints_table_end (); -} - -/* ARGSUSED */ -static void -breakpoints_info (bnum_exp, from_tty) - char *bnum_exp; - int from_tty; -{ - int bnum = -1; - - if (bnum_exp) - bnum = parse_and_eval_address (bnum_exp); - - breakpoint_1 (bnum, 0); -} - -#if MAINTENANCE_CMDS - -/* ARGSUSED */ -void -maintenance_info_breakpoints (bnum_exp, from_tty) - char *bnum_exp; - int from_tty; -{ - int bnum = -1; - - if (bnum_exp) - bnum = parse_and_eval_address (bnum_exp); - - breakpoint_1 (bnum, 1); -} - -#endif - -/* Print a message describing any breakpoints set at PC. */ - -static void -describe_other_breakpoints (pc, section) - CORE_ADDR pc; - asection *section; -{ - register int others = 0; - register struct breakpoint *b; - - ALL_BREAKPOINTS (b) - if (b->address == pc) - if (overlay_debugging == 0 || - b->section == section) - others++; - if (others > 0) - { - printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : ""); - ALL_BREAKPOINTS (b) - if (b->address == pc) - if (overlay_debugging == 0 || - b->section == section) - { - others--; - printf_filtered - ("%d%s%s ", - b->number, - ((b->enable == disabled || b->enable == shlib_disabled || b->enable == call_disabled) - ? " (disabled)" : ""), - (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 (valid, addr, symtab, line) - 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; -} - -/* Rescan breakpoints at address ADDRESS, - marking the first one as "first" and any others as "duplicates". - This is so that the bpt instruction is only inserted once. */ - -static void -check_duplicates (address, section) - CORE_ADDR address; - asection *section; -{ - register struct breakpoint *b; - register int count = 0; - - if (address == 0) /* Watchpoints are uninteresting */ - return; - - ALL_BREAKPOINTS (b) - if (b->enable != disabled - && b->enable != shlib_disabled - && b->enable != call_disabled - && b->address == address - && (overlay_debugging == 0 || b->section == section)) - { - count++; - b->duplicate = count > 1; - } -} - -/* Low level routine to set a breakpoint. - Takes as args the three things that every breakpoint must have. - Returns the breakpoint object so caller can set other things. - Does not set the breakpoint number! - Does not print anything. - - ==> This routine should not be called if there is a chance of later - error(); otherwise it leaves a bogus breakpoint on the chain. Validate - your arguments BEFORE calling this routine! */ - -struct breakpoint * -set_raw_breakpoint (sal) - struct symtab_and_line sal; -{ - 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->language = current_language->la_language; - b->input_radix = input_radix; - b->thread = -1; - b->line_number = sal.line; - b->enable = 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 (sal.pc, sal.section); - breakpoints_changed (); - - return b; -} - -#ifdef GET_LONGJMP_TARGET - -static void -create_longjmp_breakpoint (func_name) - char *func_name; -{ - struct symtab_and_line sal; - struct breakpoint *b; - - INIT_SAL (&sal); /* initialize to zeroes */ - if (func_name != NULL) - { - struct minimal_symbol *m; - - m = lookup_minimal_symbol_text (func_name, NULL, (struct objfile *)NULL); - if (m) - sal.pc = SYMBOL_VALUE_ADDRESS (m); - else - return; - } - sal.section = find_pc_overlay (sal.pc); - b = set_raw_breakpoint (sal); - if (!b) return; - - b->type = func_name != NULL ? bp_longjmp : bp_longjmp_resume; - b->disposition = donttouch; - b->enable = disabled; - b->silent = 1; - if (func_name) - b->addr_string = strsave(func_name); - b->number = internal_breakpoint_number--; -} - -#endif /* #ifdef GET_LONGJMP_TARGET */ - -/* 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() -{ - register struct breakpoint *b; - - ALL_BREAKPOINTS (b) - if (b->type == bp_longjmp) - { - b->enable = enabled; - check_duplicates (b->address, b->section); - } -} - -void -disable_longjmp_breakpoint() -{ - register struct breakpoint *b; - - ALL_BREAKPOINTS (b) - if ( b->type == bp_longjmp - || b->type == bp_longjmp_resume) - { - b->enable = disabled; - check_duplicates (b->address, b->section); - } -} - -#ifdef SOLIB_ADD -void -remove_solib_event_breakpoints () -{ - register struct breakpoint *b, *temp; - - ALL_BREAKPOINTS_SAFE (b, temp) - if (b->type == bp_shlib_event) - delete_breakpoint (b); -} - -void -create_solib_event_breakpoint (address) - CORE_ADDR address; -{ - struct breakpoint *b; - struct symtab_and_line sal; - - INIT_SAL (&sal); /* initialize to zeroes */ - sal.pc = address; - sal.section = find_pc_overlay (sal.pc); - b = set_raw_breakpoint (sal); - b->number = internal_breakpoint_number--; - b->disposition = donttouch; - b->type = bp_shlib_event; -} - -void -disable_breakpoints_in_shlibs (silent) - 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 != shlib_disabled) && - (b->enable != call_disabled) && - ! b->duplicate && - PC_SOLIB (b->address)) - { - b->enable = shlib_disabled; - if (!silent) - { - if (!disabled_shlib_breaks) - { - target_terminal_ours_for_output (); - printf_filtered ("Temporarily disabling shared library breakpoints:\n"); - } - disabled_shlib_breaks = 1; - printf_filtered ("%d ", b->number); - } - } -#endif - } - if (disabled_shlib_breaks && !silent) - printf_filtered ("\n"); -} - -/* Try to reenable any breakpoints in shared libraries. */ -void -re_enable_breakpoints_in_shlibs () -{ - struct breakpoint *b; - - ALL_BREAKPOINTS (b) - if (b->enable == 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 = enabled; - } -} - -#endif - -static void -create_solib_load_unload_event_breakpoint (hookname, tempflag, dll_pathname, cond_string, bp_kind) - char * hookname; - int tempflag; - char * dll_pathname; - char * cond_string; - enum bptype bp_kind; -{ - struct breakpoint * b; - struct symtabs_and_lines sals; - struct symtab_and_line sal; - struct cleanup * old_chain; - struct cleanup * canonical_strings_chain = NULL; - int i; - 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 a 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 (free, sals.sals); - if (canonical != (char **)NULL) - { - make_cleanup (free, canonical); - canonical_strings_chain = make_cleanup (null_cleanup, 0); - if (canonical[0] != NULL) - make_cleanup (free, 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]); - 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 = enabled; - b->disposition = tempflag ? del : 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); - } - b->type = bp_kind; - - mention (b); - do_cleanups (old_chain); -} - -void -create_solib_load_event_breakpoint (hookname, tempflag, dll_pathname, cond_string) - char * hookname; - int tempflag; - char * dll_pathname; - char * cond_string; -{ - create_solib_load_unload_event_breakpoint (hookname, - tempflag, - dll_pathname, - cond_string, - bp_catch_load); -} - -void -create_solib_unload_event_breakpoint (hookname, tempflag, dll_pathname, cond_string) - char * hookname; - int tempflag; - char * dll_pathname; - char * cond_string; -{ - create_solib_load_unload_event_breakpoint (hookname, - tempflag, - dll_pathname, - cond_string, - bp_catch_unload); -} - -static void -create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_kind) - 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); - 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 = enabled; - b->disposition = tempflag ? del : donttouch; - b->forked_inferior_pid = 0; - - b->type = bp_kind; - - mention (b); -} - -void -create_fork_event_catchpoint (tempflag, cond_string) - int tempflag; - char * cond_string; -{ - create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork); -} - -void -create_vfork_event_catchpoint (tempflag, cond_string) - int tempflag; - char * cond_string; -{ - create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork); -} - -void -create_exec_event_catchpoint (tempflag, cond_string) - 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); - 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 = enabled; - b->disposition = tempflag ? del : donttouch; - - b->type = bp_catch_exec; - - mention (b); -} - -static int -hw_breakpoint_used_count() -{ - register struct breakpoint *b; - int i = 0; - - ALL_BREAKPOINTS (b) - { - if (b->type == bp_hardware_breakpoint && b->enable == enabled) - i++; - } - - return i; -} - -static int -hw_watchpoint_used_count(type, other_type_used) - enum bptype type; - int *other_type_used; -{ - register struct breakpoint *b; - int i = 0; - - *other_type_used = 0; - ALL_BREAKPOINTS (b) - { - if (b->enable == 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 == 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(pc, frame) - 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 = enabled; - if (frame != NULL) - b->frame = frame->frame; - else - b->frame = 0; - check_duplicates (b->address, b->section); - return; - } -} - -void -disable_watchpoints_before_interactive_call_start () -{ - 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 == enabled)) - { - b->enable = call_disabled; - check_duplicates (b->address, b->section); - } - } -} - -void -enable_watchpoints_after_interactive_call_stop () -{ - 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 == call_disabled)) - { - b->enable = enabled; - check_duplicates (b->address, b->section); - } - } -} - - -/* 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 (sal, frame, type) - struct symtab_and_line sal; - struct frame_info *frame; - enum bptype type; -{ - register struct breakpoint *b; - b = set_raw_breakpoint (sal); - b->type = type; - b->enable = enabled; - b->disposition = 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_pid)) - b->thread = pid_to_thread_id (inferior_pid); - - return b; -} - - -/* Tell the user we have just set a breakpoint B. */ - -static void -mention (b) - struct breakpoint *b; -{ - int say_where = 0; - - /* 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); - - switch (b->type) - { - case bp_none: - printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number); - break; - case bp_watchpoint: - printf_filtered ("Watchpoint %d: ", b->number); - print_expression (b->exp, gdb_stdout); - break; - case bp_hardware_watchpoint: - printf_filtered ("Hardware watchpoint %d: ", b->number); - print_expression (b->exp, gdb_stdout); - break; - case bp_read_watchpoint: - printf_filtered ("Hardware read watchpoint %d: ", b->number); - print_expression (b->exp, gdb_stdout); - break; - case bp_access_watchpoint: - printf_filtered ("Hardware access (read/write) watchpoint %d: ",b->number); - print_expression (b->exp, gdb_stdout); - break; - case bp_breakpoint: - printf_filtered ("Breakpoint %d", b->number); - say_where = 1; - break; - case bp_hardware_breakpoint: - 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: - 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); - TUIDO(((TuiOpaqueFuncPtr)tui_vAllSetHasBreakAt, b, 1)); - TUIDO(((TuiOpaqueFuncPtr)tuiUpdateAllExecInfos)); - } - printf_filtered ("\n"); -} - - -/* 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 (arg, flag, from_tty) - char *arg; - int flag, from_tty; -{ - int tempflag, hardwareflag; - struct symtabs_and_lines sals; - struct symtab_and_line sal; - register struct expression *cond = 0; - register struct breakpoint *b; - - /* Pointers in arg to the start, and one past the end, of the condition. */ - char *cond_start = NULL; - char *cond_end = NULL; - /* Pointers in arg to the start, and one past the end, - of the address part. */ - char *addr_start = NULL; - char *addr_end = NULL; - struct cleanup *old_chain; - struct cleanup *canonical_strings_chain = NULL; - char **canonical = (char **)NULL; - int i; - int thread; - - hardwareflag = flag & BP_HARDWAREFLAG; - tempflag = flag & BP_TEMPFLAG; - - sals.sals = NULL; - sals.nelts = 0; - - INIT_SAL (&sal); /* initialize to zeroes */ - - /* If no arg given, or if first arg is 'if ', use the default breakpoint. */ - - if (!arg || (arg[0] == 'i' && arg[1] == 'f' - && (arg[2] == ' ' || arg[2] == '\t'))) - { - if (default_breakpoint_valid) - { - 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 - { - addr_start = arg; - - /* 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 - || (arg && (*arg == '+' || *arg == '-')))) - sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, - default_breakpoint_line, &canonical); - else - sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, &canonical); - - addr_end = arg; - } - - if (! sals.nelts) - return; - - /* Make sure that all storage allocated in decode_line_1 gets freed in case - the following `for' loop errors out. */ - old_chain = make_cleanup (free, sals.sals); - if (canonical != (char **)NULL) - { - make_cleanup (free, canonical); - canonical_strings_chain = make_cleanup (null_cleanup, 0); - for (i = 0; i < sals.nelts; i++) - { - if (canonical[i] != NULL) - make_cleanup (free, canonical[i]); - } - } - - thread = -1; /* No specific thread yet */ - - /* Resolve all line numbers to PC's, and verify that conditions - can be parsed, before setting any breakpoints. */ - for (i = 0; i < sals.nelts; i++) - { - char *tok, *end_tok; - int toklen; - - 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)) - { - error ("Cannot break on %s without a running program.", addr_start); - } - - tok = arg; - - while (tok && *tok) - { - 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, block_for_pc (sals.sals[i].pc), 0); - cond_end = tok; - } - 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."); - } - } - if (hardwareflag) - { - int i, target_resources_ok; - - i = hw_breakpoint_used_count (); - 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."); - } - - /* Remove the canonical strings from the cleanup, they are needed below. */ - if (canonical != (char **)NULL) - discard_cleanups (canonical_strings_chain); - - /* Now set all the breakpoints. */ - for (i = 0; i < sals.nelts; i++) - { - sal = sals.sals[i]; - - if (from_tty) - describe_other_breakpoints (sal.pc, sal.section); - - b = set_raw_breakpoint (sal); - set_breakpoint_count (breakpoint_count + 1); - b->number = breakpoint_count; - b->type = hardwareflag ? bp_hardware_breakpoint : bp_breakpoint; - b->cond = cond; - b->thread = thread; - - /* If a canonical line spec is needed use that instead of the - command string. */ - if (canonical != (char **)NULL && canonical[i] != NULL) - b->addr_string = canonical[i]; - else if (addr_start) - b->addr_string = savestring (addr_start, addr_end - addr_start); - if (cond_start) - b->cond_string = savestring (cond_start, cond_end - cond_start); - - b->enable = enabled; - b->disposition = tempflag ? del : donttouch; - mention (b); - } - - if (sals.nelts > 1) - { - printf_filtered ("Multiple breakpoints were set.\n"); - printf_filtered ("Use the \"delete\" command to delete unwanted breakpoints.\n"); - } - do_cleanups (old_chain); -} - -static void -break_at_finish_at_depth_command_1 (arg, flag, from_tty) - char *arg; - int flag; - int from_tty; -{ - struct frame_info *frame; - CORE_ADDR low, high, selected_pc = 0; - char *extra_args, *level_arg, *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%x %s", high, extra_args); - else - sprintf (addr_string, "*0x%x", high); - break_command_1 (addr_string, flag, from_tty); - free (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 (arg, flag, from_tty) - 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; - 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%x", 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); - - free (beg_addr_string); - old_chain = make_cleanup (free, 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%x %s", high, extra_args); - else - sprintf (break_string, "*0x%x", high); - break_command_1 (break_string, flag, from_tty); - free(break_string); - } - else - error ("No function contains the specified address"); - } - if (sals.nelts > 1) - { - printf_filtered ("Multiple breakpoints were set.\n"); - printf_filtered ("Use the \"delete\" command to delete unwanted breakpoints.\n"); - } - do_cleanups(old_chain); -} - - -/* Helper function for break_command_1 and disassemble_command. */ - -void -resolve_sal_pc (sal) - 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 (arg, from_tty) - char *arg; - int from_tty; -{ - break_command_1 (arg, 0, from_tty); -} - -void -break_at_finish_command (arg, from_tty) - char *arg; - int from_tty; -{ - break_at_finish_command_1 (arg, 0, from_tty); -} - -void -break_at_finish_at_depth_command (arg, from_tty) - char *arg; - int from_tty; -{ - break_at_finish_at_depth_command_1 (arg, 0, from_tty); -} - -void -tbreak_command (arg, from_tty) - char *arg; - int from_tty; -{ - break_command_1 (arg, BP_TEMPFLAG, from_tty); -} - -void -tbreak_at_finish_command (arg, from_tty) - char *arg; - int from_tty; -{ - break_at_finish_command_1 (arg, BP_TEMPFLAG, from_tty); -} - -static void -hbreak_command (arg, from_tty) - char *arg; - int from_tty; -{ - break_command_1 (arg, BP_HARDWAREFLAG, from_tty); -} - -static void -thbreak_command (arg, from_tty) - char *arg; - int from_tty; -{ - break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty); -} - -static void -stop_command (arg, from_tty) - 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 (arg, from_tty) - 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 (arg, from_tty) - 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: 0: watch write, 1: watch read, 2: watch access(read or write) */ -static void -watch_command_1 (arg, accessflag, from_tty) - 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 == 1) bp_type = bp_read_watchpoint; - else if (accessflag == 2) 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 have this type of hardware watchpoint support."); - if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint) - error ("Target resources have been allocated for other types of watchpoints."); - } - -#if defined(HPUXHPPA) - /* ??rehrauer: DTS #CHFts23014 notes that 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_pid - 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 */ - - /* Now set up the breakpoint. */ - b = set_raw_breakpoint (sal); - set_breakpoint_count (breakpoint_count + 1); - b->number = breakpoint_count; - b->disposition = 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); - b->watchpoint_frame = frame->frame; - } - else - b->watchpoint_frame = (CORE_ADDR)0; - - if (mem_cnt && target_resources_ok > 0) - b->type = bp_type; - else - b->type = bp_watchpoint; - - /* 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; - struct symtab_and_line scope_sal; - - INIT_SAL (&scope_sal); /* initialize to zeroes */ - scope_sal.pc = get_frame_pc (prev_frame); - scope_sal.section = find_pc_overlay (scope_sal.pc); - - scope_breakpoint = set_raw_breakpoint (scope_sal); - set_breakpoint_count (breakpoint_count + 1); - scope_breakpoint->number = breakpoint_count; - - scope_breakpoint->type = bp_watchpoint_scope; - scope_breakpoint->enable = enabled; - - /* Automatically delete the breakpoint when it hits. */ - scope_breakpoint->disposition = 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 - -static int -can_use_hardware_watchpoint (v) - struct value *v; -{ - int found_memory_cnt = 0; - - /* Did the user specifically forbid us to use hardware watchpoints? */ - if (! can_use_hw_watchpoints) - return 0; - - /* Make sure all the intermediate values are in memory. Also make sure - we found at least one memory expression. Guards against watch 0x12345, - which is meaningless, but could cause errors if one tries to insert a - hardware watchpoint for the constant expression. */ - for ( ; v; v = v->next) - { - if (v->lval == lval_memory) - { - if (TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT (TYPE_LENGTH (VALUE_TYPE (v)))) - found_memory_cnt++; - } - else if (v->lval != not_lval && v->modifiable == 0) - return 0; - } - - /* The expression itself looks suitable for using a hardware - watchpoint, but give the target machine a chance to reject it. */ - return found_memory_cnt; -} - -static void watch_command (arg, from_tty) - char *arg; - int from_tty; -{ - watch_command_1 (arg, 0, from_tty); -} - -static void rwatch_command (arg, from_tty) - char *arg; - int from_tty; -{ - watch_command_1 (arg, 1, from_tty); -} - -static void awatch_command (arg, from_tty) - char *arg; - int from_tty; -{ - watch_command_1 (arg, 2, from_tty); -} - - -/* Helper routine for the until_command routine in infcmd.c. Here - because it uses the mechanisms of breakpoints. */ - -/* ARGSUSED */ -void -until_break_command (arg, from_tty) - 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; - - 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]; - free ((PTR)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); - - old_chain = make_cleanup ((make_cleanup_func) delete_breakpoint, breakpoint); - - /* 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); - make_cleanup ((make_cleanup_func) delete_breakpoint, breakpoint); - } - - proceed (-1, TARGET_SIGNAL_DEFAULT, 0); - 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 (name) - char *name; -{ -} - -static int -disable_catch_breakpoint () -{ -} - -static int -delete_catch_breakpoint () -{ -} - -static int -enable_catch_breakpoint () -{ -} -#endif /* 0 */ - -struct sal_chain -{ - struct sal_chain *next; - struct symtab_and_line sal; -}; - -/* 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 (args, function) - 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++; - } -} - -/* This shares a lot of code with `print_frame_label_vars' from stack.c. */ - -static struct symtabs_and_lines -get_catch_sals (this_level_only) - 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); - 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); - int nsyms; - register int i; - register struct symbol *sym; - - nsyms = BLOCK_NSYMS (b); - - for (i = 0; i < nsyms; i++) - { - sym = BLOCK_SYM (b, i); - 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 (s) - 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 (arg) - 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 (arg) - 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 (arg) - 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; - -static void -catch_fork_command_1 (fork_kind, arg, tempflag, from_tty) - 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; - } -} - -static void -catch_exec_command_1 (arg, tempflag, from_tty) - 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); -} - -#if defined(SOLIB_ADD) -static void -catch_load_command_1 (arg, tempflag, from_tty) - 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 (inferior_pid, tempflag, dll_pathname, cond_string); -} - -static void -catch_unload_command_1 (arg, tempflag, from_tty) - 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 (inferior_pid, 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 (tempflag, cond_string, ex_event, sal) - int tempflag; - char * cond_string; - enum exception_event_kind ex_event; - struct symtab_and_line * sal; -{ - struct breakpoint * b; - int i; - int thread = -1; /* All threads. */ - - if (!sal) /* no exception support? */ - return; - - b = set_raw_breakpoint (*sal); - 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 = enabled; - b->disposition = tempflag ? del : donttouch; - switch (ex_event) - { - case EX_EVENT_THROW: - b->type = bp_catch_throw; - break; - case EX_EVENT_CATCH: - b->type = bp_catch_catch; - break; - default: /* error condition */ - b->type = bp_none; - b->enable = disabled; - error ("Internal error -- invalid catchpoint kind"); - } - mention (b); -} - -/* Deal with "catch catch" and "catch throw" commands */ - -static void -catch_exception_command_1 (ex_event, arg, tempflag, from_tty) - 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 () */ - - fprintf_filtered (gdb_stderr, "Unsupported with this platform/compiler combination.\n"); - fprintf_filtered (gdb_stderr, "Perhaps you can achieve the effect you want by setting\n"); - fprintf_filtered (gdb_stderr, "a breakpoint on __raise_exception().\n"); - } - } -} - -/* Cover routine to allow wrapping target_enable_exception_catchpoints - inside a catch_errors */ - -static int -cover_target_enable_exception_callback (arg) - PTR arg; -{ - args_for_catchpoint_enable *args = arg; - struct symtab_and_line *sal; - sal = target_enable_exception_callback (args->kind, args->enable); - 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 (arg, tempflag, from_tty) - 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); - - b = set_raw_breakpoint (sal); - set_breakpoint_count (breakpoint_count + 1); - b->number = breakpoint_count; - b->type = bp_breakpoint; /* 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->cond = cond; - b->enable = enabled; - b->disposition = tempflag ? del : donttouch; - - mention (b); - } - - if (sals.nelts > 1) - { - printf_unfiltered ("Multiple breakpoints were set.\n"); - printf_unfiltered ("Use the \"delete\" command to delete unwanted breakpoints.\n"); - } - free ((PTR)sals.sals); -} - -#if 0 -/* This creates a temporary internal breakpoint - just to placate infrun */ -static struct breakpoint * -create_temp_exception_breakpoint (pc) - CORE_ADDR pc; -{ - struct symtab_and_line sal; - struct breakpoint *b; - - INIT_SAL(&sal); - sal.pc = pc; - sal.symtab = NULL; - sal.line = 0; - - b = set_raw_breakpoint (sal); - if (!b) - error ("Internal error -- couldn't set temp exception breakpoint"); - - b->type = bp_breakpoint; - b->disposition = del; - b->enable = enabled; - b->silent = 1; - b->number = internal_breakpoint_number--; - return b; -} -#endif - -static void -catch_command_1 (arg, tempflag, from_tty) - 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 (sal) - struct symtab_and_line sal; -{ - struct breakpoint *b; - b = set_raw_breakpoint (sal); - set_breakpoint_count (breakpoint_count + 1); - b->number = breakpoint_count; - b->type = bp_breakpoint; - 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 (args) - 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 (args) - 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 (args) - char *args; -{ - /* Map the delete command to catch clauses described in ARGS. */ -} -#endif /* 0 */ - -static void -catch_command (arg, from_tty) - char *arg; - int from_tty; -{ - catch_command_1 (arg, 0, from_tty); -} - - -static void -tcatch_command (arg, from_tty) - char *arg; - int from_tty; -{ - catch_command_1 (arg, 1, from_tty); -} - - -static void -clear_command (arg, from_tty) - char *arg; - int from_tty; -{ - register struct breakpoint *b, *b1; - int default_match; - struct symtabs_and_lines sals; - struct symtab_and_line sal; - register struct breakpoint *found; - 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)); - 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. We do this in two loops: the first loop looks at - the initial bp(s) in the chain which should be deleted, - the second goes down the rest of the chain looking ahead - one so it can take those bps off the chain without messing - up the chain. */ - - - 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]; - found = (struct breakpoint *) 0; - - - while (breakpoint_chain - /* Why don't we check here that this is not - a watchpoint, etc., as we do below? - I can't make it fail, but don't know - what's stopping the failure: a watchpoint - of the same address as "sal.pc" should - wind up being deleted. */ - - && ( ((sal.pc && (breakpoint_chain->address == sal.pc)) && - (overlay_debugging == 0 || - breakpoint_chain->section == sal.section)) - || ((default_match || (0 == sal.pc)) - && breakpoint_chain->source_file != NULL - && sal.symtab != NULL - && STREQ (breakpoint_chain->source_file, sal.symtab->filename) - && breakpoint_chain->line_number == sal.line))) - - { - b1 = breakpoint_chain; - breakpoint_chain = b1->next; - b1->next = found; - found = b1; - } - - ALL_BREAKPOINTS (b) - - while (b->next - && b->next->type != bp_none - && b->next->type != bp_watchpoint - && b->next->type != bp_hardware_watchpoint - && b->next->type != bp_read_watchpoint - && b->next->type != bp_access_watchpoint - && ( ((sal.pc && (b->next->address == sal.pc)) && - (overlay_debugging == 0 || - b->next->section == sal.section)) - || ((default_match || (0 == sal.pc)) - && b->next->source_file != NULL - && sal.symtab != NULL - && STREQ (b->next->source_file, sal.symtab->filename) - && b->next->line_number == sal.line))) - - - { - b1 = b->next; - b->next = b1->next; - b1->next = found; - found = b1; - } - - 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); - b1 = found->next; - delete_breakpoint (found); - found = b1; - } - if (from_tty) putchar_unfiltered ('\n'); - } - free ((PTR)sals.sals); -} - -/* 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 (bs) - bpstat bs; -{ - struct breakpoint *b, *temp; - - for (; bs; bs = bs->next) - if (bs->breakpoint_at && bs->breakpoint_at->disposition == del - && bs->stop) - delete_breakpoint (bs->breakpoint_at); - - ALL_BREAKPOINTS_SAFE (b, temp) - { - if (b->disposition == del_at_next_stop) - delete_breakpoint (b); - } -} - -/* Delete a breakpoint and clean up all traces of it in the data structures. */ - -void -delete_breakpoint (bpt) - 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); - - if (bpt->inserted) - remove_breakpoint (bpt, mark_uninserted); - - 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; - - sprintf (message, message1, bpt->number); /* Format possible error msg */ - args.kind = bpt->type == bp_catch_catch ? EX_EVENT_CATCH : EX_EVENT_THROW; - args.enable = 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; - } - - /* Before turning off the visuals for the bp, check to see that - there are no other bps at the same address. */ - if (tui_version) - { - int clearIt; - - ALL_BREAKPOINTS (b) - { - clearIt = (b->address != bpt->address); - if (!clearIt) - break; - } - - if (clearIt) - { - TUIDO(((TuiOpaqueFuncPtr)tui_vAllSetHasBreakAt, bpt, 0)); - TUIDO(((TuiOpaqueFuncPtr)tuiUpdateAllExecInfos)); - } - } - - check_duplicates (bpt->address, bpt->section); - /* 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 != disabled - && b->enable != shlib_disabled - && b->enable != call_disabled) - { - int val; - val = target_insert_breakpoint (b->address, b->shadow_contents); - if (val != 0) - { - target_terminal_ours_for_output (); - fprintf_unfiltered (gdb_stderr, "Cannot insert breakpoint %d:\n", b->number); - memory_error (val, b->address); /* which bombs us out */ - } - else - b->inserted = 1; - } - } - - free_command_lines (&bpt->commands); - if (bpt->cond) - free (bpt->cond); - if (bpt->cond_string != NULL) - free (bpt->cond_string); - if (bpt->addr_string != NULL) - free (bpt->addr_string); - if (bpt->exp != NULL) - free (bpt->exp); - if (bpt->exp_string != NULL) - free (bpt->exp_string); - if (bpt->val != NULL) - value_free (bpt->val); - if (bpt->source_file != NULL) - free (bpt->source_file); - if (bpt->dll_pathname != NULL) - free (bpt->dll_pathname); - if (bpt->triggered_dll_pathname != NULL) - free (bpt->triggered_dll_pathname); - if (bpt->exec_pathname != NULL) - free (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; - - /* we'd call bpstat_clear_actions, but that free's stuff and due - to the multiple pointers pointing to one item with no - reference counts found anywhere through out the bpstat's (how - do you spell fragile?), we don't want to free things twice -- - better a memory leak than a corrupt malloc pool! */ - bs->commands = NULL; - bs->old_val = NULL; - } - /* 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; - - free ((PTR)bpt); -} - -void -delete_command (arg, from_tty) - char *arg; - int from_tty; -{ - struct breakpoint *b, *temp; - - 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->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->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 (bint) - PTR bint; -{ - struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */ - struct value *mark; - int i; - struct symtabs_and_lines sals; - char *s; - enum enable save_enable; - - switch (b->type) - { - case bp_none: - warning ("attempted to reset apparently deleted breakpoint #%d?\n", 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; - } - /* In case we have a problem, disable this breakpoint. We'll restore - its status if we succeed. */ - save_enable = b->enable; - b->enable = 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) - free ((PTR)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) - free (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 disable - 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 = save_enable; /* Restore it, this worked. */ - - - /* Now that this is re-enabled, check_duplicates - can be used. */ - check_duplicates (b->address, b->section); - - } - free ((PTR)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 functionnames. */ - /* So for now, just use a global context. */ - if (b->exp) - free ((PTR)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) - free ((PTR)b->cond); - b->cond = parse_exp_1 (&s, (struct block *)0, 0); - } - if (b->enable == 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 breakpoints, they will be reset later by - breakpoint_re_set. */ - case bp_longjmp: - case bp_longjmp_resume: - 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: - - /* 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 () -{ - 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) - { - sprintf (message, message1, b->number); /* Format possible error msg */ - catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL); - } - set_language (save_language); - input_radix = save_input_radix; - -#ifdef GET_LONGJMP_TARGET - create_longjmp_breakpoint ("longjmp"); - create_longjmp_breakpoint ("_longjmp"); - create_longjmp_breakpoint ("siglongjmp"); - create_longjmp_breakpoint ("_siglongjmp"); - create_longjmp_breakpoint (NULL); -#endif - -#if 0 - /* Took this out (temporarily at least), since it produces an extra - blank line at startup. This messes up the gdbtests. -PB */ - /* Blank line to finish off all those mention() messages we just printed. */ - printf_filtered ("\n"); -#endif -} - -/* 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). */ - -/* 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_pid. */ -void -breakpoint_re_set_thread (b) - struct breakpoint * b; -{ - if (b->thread != -1) - { - if (in_thread_list (inferior_pid)) - b->thread = pid_to_thread_id (inferior_pid); - } -} - -void -set_ignore_count (bptnum, count, from_tty) - int bptnum, count, 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) - return; - else 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 (); - return; - } - - error ("No breakpoint number %d.", bptnum); -} - -/* Clear the ignore counts of all breakpoints. */ -void -breakpoint_clear_ignore_counts () -{ - struct breakpoint *b; - - ALL_BREAKPOINTS (b) - b->ignore_count = 0; -} - -/* Command to set ignore-count of breakpoint N to COUNT. */ - -static void -ignore_command (args, from_tty) - 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 (*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); - printf_filtered ("\n"); - breakpoints_changed (); -} - -/* Call FUNCTION on each of the breakpoints - whose numbers are given in ARGS. */ - -static void -map_breakpoint_numbers (args, function) - char *args; - void (*function) PARAMS ((struct breakpoint *)); -{ - register char *p = args; - char *p1; - register int num; - register struct breakpoint *b; - - if (p == 0) - error_no_arg ("one or more breakpoint numbers"); - - while (*p) - { - p1 = p; - - num = get_number (&p1); - - ALL_BREAKPOINTS (b) - if (b->number == num) - { - struct breakpoint *related_breakpoint = b->related_breakpoint; - function (b); - if (related_breakpoint) - function (related_breakpoint); - goto win; - } - printf_unfiltered ("No breakpoint number %d.\n", num); - win: - p = p1; - } -} - -void -disable_breakpoint (bpt) - 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; - - bpt->enable = disabled; - - check_duplicates (bpt->address, bpt->section); - - if (modify_breakpoint_hook) - modify_breakpoint_hook (bpt); -} - -/* ARGSUSED */ -static void -disable_command (args, from_tty) - 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?\n", 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 (bpt, disposition) - 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."); - } - - bpt->enable = enabled; - bpt->disposition = disposition; - check_duplicates (bpt->address, bpt->section); - 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 = - - /* Ensure that we have the current frame. Else, this - next query may pessimistically be answered as, "No, - not within current scope". */ - get_current_frame (); - fr = find_frame_addr_in_frame_chain (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 = disabled; - return; - } - - save_selected_frame = selected_frame; - save_selected_frame_level = selected_frame_level; - select_frame (fr, -1); - } - - 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 = disabled; - value_free_to_mark (mark); - return; - } - } - - if (save_selected_frame_level >= 0) - select_and_print_frame (save_selected_frame, save_selected_frame_level); - value_free_to_mark (mark); - } - if (modify_breakpoint_hook) - modify_breakpoint_hook (bpt); -} - -void -enable_breakpoint (bpt) - 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 (args, from_tty) - 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?\n", 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 (bpt) - struct breakpoint *bpt; -{ - do_enable_breakpoint (bpt, disable); -} - -/* ARGSUSED */ -static void -enable_once_command (args, from_tty) - char *args; - int from_tty; -{ - map_breakpoint_numbers (args, enable_once_breakpoint); -} - -static void -enable_delete_breakpoint (bpt) - struct breakpoint *bpt; -{ - do_enable_breakpoint (bpt, del); -} - -/* ARGSUSED */ -static void -enable_delete_command (args, from_tty) - 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 (string, funfirstline) - 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 () -{ - 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. "); - - 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."); - add_com("txbreak", class_breakpoint, tbreak_at_finish_command, - "Set temporary breakpoint at procedure exit. Either there should\n\ -be no argument or the argument must be a depth.\n"); - - 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."); - - 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."); - - 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)); - - 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)); - 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); - - add_com("xbreak", class_breakpoint, break_at_finish_command, - concat("Set breakpoint at procedure exit. \n\ -Argument may be function name, or \"*\" and an address.\n\ -If function is specified, break at end of code for that function.\n\ -If an address is specified, break at the end of the function that contains \n\ -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)); - add_com_alias ("xb", "xbreak", class_breakpoint, 1); - add_com_alias ("xbr", "xbreak", class_breakpoint, 1); - add_com_alias ("xbre", "xbreak", class_breakpoint, 1); - add_com_alias ("xbrea", "xbreak", class_breakpoint, 1); - - if (xdb_commands) - { - add_com_alias ("ba", "break", class_breakpoint, 1); - add_com_alias ("bu", "ubreak", class_breakpoint, 1); - add_com ("bx", class_breakpoint, break_at_finish_at_depth_command, - "Set breakpoint at procedure exit. Either there should\n\ -be no argument or the argument must be a depth.\n"); - } - - 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 \"$bpnum\" contains the number of the last\n\ -breakpoint set.", NULL)); - -#if MAINTENANCE_CMDS - - add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints, - concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\ -The \"Type\" column indicates one of:\n\ -\tbreakpoint - normal breakpoint\n\ -\twatchpoint - watchpoint\n\ -\tlongjmp - internal breakpoint used to step through longjmp()\n\ -\tlongjmp resume - internal breakpoint at the target of longjmp()\n\ -\tuntil - internal breakpoint used by the \"until\" command\n\ -\tfinish - internal breakpoint used by the \"finish\" command\n", -"The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ -the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ -breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ -address and file/line number respectively.\n\n", -"Convenience variable \"$_\" 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); - -#endif /* MAINTENANCE_CMDS */ - - 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."); - -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."); - - 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."); - - 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."); - - 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; -} |