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Diffstat (limited to 'gdb/printcmd.c')
| -rw-r--r-- | gdb/printcmd.c | 2572 |
1 files changed, 0 insertions, 2572 deletions
diff --git a/gdb/printcmd.c b/gdb/printcmd.c deleted file mode 100644 index 2e57050..0000000 --- a/gdb/printcmd.c +++ /dev/null @@ -1,2572 +0,0 @@ -/* Print values for GNU debugger GDB. - - Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, - 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software - Foundation, Inc. - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include "defs.h" -#include "gdb_string.h" -#include "frame.h" -#include "symtab.h" -#include "gdbtypes.h" -#include "value.h" -#include "language.h" -#include "expression.h" -#include "gdbcore.h" -#include "gdbcmd.h" -#include "target.h" -#include "breakpoint.h" -#include "demangle.h" -#include "valprint.h" -#include "annotate.h" -#include "symfile.h" /* for overlay functions */ -#include "objfiles.h" /* ditto */ -#include "completer.h" /* for completion functions */ -#include "ui-out.h" -#include "gdb_assert.h" - -extern int asm_demangle; /* Whether to demangle syms in asm printouts */ -extern int addressprint; /* Whether to print hex addresses in HLL " */ - -struct format_data - { - int count; - char format; - char size; - }; - -/* Last specified output format. */ - -static char last_format = 'x'; - -/* Last specified examination size. 'b', 'h', 'w' or `q'. */ - -static char last_size = 'w'; - -/* Default address to examine next. */ - -static CORE_ADDR next_address; - -/* Default section to examine next. */ - -static asection *next_section; - -/* Last address examined. */ - -static CORE_ADDR last_examine_address; - -/* Contents of last address examined. - This is not valid past the end of the `x' command! */ - -static struct value *last_examine_value; - -/* Largest offset between a symbolic value and an address, that will be - printed as `0x1234 <symbol+offset>'. */ - -static unsigned int max_symbolic_offset = UINT_MAX; - -/* Append the source filename and linenumber of the symbol when - printing a symbolic value as `<symbol at filename:linenum>' if set. */ -static int print_symbol_filename = 0; - -/* Number of auto-display expression currently being displayed. - So that we can disable it if we get an error or a signal within it. - -1 when not doing one. */ - -int current_display_number; - -/* Flag to low-level print routines that this value is being printed - in an epoch window. We'd like to pass this as a parameter, but - every routine would need to take it. Perhaps we can encapsulate - this in the I/O stream once we have GNU stdio. */ - -int inspect_it = 0; - -struct display - { - /* Chain link to next auto-display item. */ - struct display *next; - /* Expression to be evaluated and displayed. */ - struct expression *exp; - /* Item number of this auto-display item. */ - int number; - /* Display format specified. */ - struct format_data format; - /* Innermost block required by this expression when evaluated */ - struct block *block; - /* Status of this display (enabled or disabled) */ - int enabled_p; - }; - -/* Chain of expressions whose values should be displayed - automatically each time the program stops. */ - -static struct display *display_chain; - -static int display_number; - -/* Prototypes for exported functions. */ - -void output_command (char *, int); - -void _initialize_printcmd (void); - -/* Prototypes for local functions. */ - -static void delete_display (int); - -static void enable_display (char *, int); - -static void disable_display_command (char *, int); - -static void disassemble_command (char *, int); - -static void printf_command (char *, int); - -static void print_frame_nameless_args (struct frame_info *, long, - int, int, struct ui_file *); - -static void display_info (char *, int); - -static void do_one_display (struct display *); - -static void undisplay_command (char *, int); - -static void free_display (struct display *); - -static void display_command (char *, int); - -void x_command (char *, int); - -static void address_info (char *, int); - -static void set_command (char *, int); - -static void call_command (char *, int); - -static void inspect_command (char *, int); - -static void print_command (char *, int); - -static void print_command_1 (char *, int, int); - -static void validate_format (struct format_data, char *); - -static void do_examine (struct format_data, CORE_ADDR addr, - asection * section); - -static void print_formatted (struct value *, int, int, struct ui_file *); - -static struct format_data decode_format (char **, int, int); - -static int print_insn (CORE_ADDR, struct ui_file *); - -static void sym_info (char *, int); - - -/* Decode a format specification. *STRING_PTR should point to it. - OFORMAT and OSIZE are used as defaults for the format and size - if none are given in the format specification. - If OSIZE is zero, then the size field of the returned value - should be set only if a size is explicitly specified by the - user. - The structure returned describes all the data - found in the specification. In addition, *STRING_PTR is advanced - past the specification and past all whitespace following it. */ - -static struct format_data -decode_format (char **string_ptr, int oformat, int osize) -{ - struct format_data val; - register char *p = *string_ptr; - - val.format = '?'; - val.size = '?'; - val.count = 1; - - if (*p >= '0' && *p <= '9') - val.count = atoi (p); - while (*p >= '0' && *p <= '9') - p++; - - /* Now process size or format letters that follow. */ - - while (1) - { - if (*p == 'b' || *p == 'h' || *p == 'w' || *p == 'g') - val.size = *p++; - else if (*p >= 'a' && *p <= 'z') - val.format = *p++; - else - break; - } - - while (*p == ' ' || *p == '\t') - p++; - *string_ptr = p; - - /* Set defaults for format and size if not specified. */ - if (val.format == '?') - { - if (val.size == '?') - { - /* Neither has been specified. */ - val.format = oformat; - val.size = osize; - } - else - /* If a size is specified, any format makes a reasonable - default except 'i'. */ - val.format = oformat == 'i' ? 'x' : oformat; - } - else if (val.size == '?') - switch (val.format) - { - case 'a': - case 's': - /* Pick the appropriate size for an address. */ - if (TARGET_PTR_BIT == 64) - val.size = osize ? 'g' : osize; - else if (TARGET_PTR_BIT == 32) - val.size = osize ? 'w' : osize; - else if (TARGET_PTR_BIT == 16) - val.size = osize ? 'h' : osize; - else - /* Bad value for TARGET_PTR_BIT */ - internal_error (__FILE__, __LINE__, "failed internal consistency check"); - break; - case 'f': - /* Floating point has to be word or giantword. */ - if (osize == 'w' || osize == 'g') - val.size = osize; - else - /* Default it to giantword if the last used size is not - appropriate. */ - val.size = osize ? 'g' : osize; - break; - case 'c': - /* Characters default to one byte. */ - val.size = osize ? 'b' : osize; - break; - default: - /* The default is the size most recently specified. */ - val.size = osize; - } - - return val; -} - -/* Print value VAL on stream according to FORMAT, a letter or 0. - Do not end with a newline. - 0 means print VAL according to its own type. - SIZE is the letter for the size of datum being printed. - This is used to pad hex numbers so they line up. */ - -static void -print_formatted (struct value *val, register int format, int size, - struct ui_file *stream) -{ - struct type *type = check_typedef (VALUE_TYPE (val)); - int len = TYPE_LENGTH (type); - - if (VALUE_LVAL (val) == lval_memory) - { - next_address = VALUE_ADDRESS (val) + len; - next_section = VALUE_BFD_SECTION (val); - } - - switch (format) - { - case 's': - /* FIXME: Need to handle wchar_t's here... */ - next_address = VALUE_ADDRESS (val) - + val_print_string (VALUE_ADDRESS (val), -1, 1, stream); - next_section = VALUE_BFD_SECTION (val); - break; - - case 'i': - /* The old comment says - "Force output out, print_insn not using _filtered". - I'm not completely sure what that means, I suspect most print_insn - now do use _filtered, so I guess it's obsolete. - --Yes, it does filter now, and so this is obsolete. -JB */ - - /* We often wrap here if there are long symbolic names. */ - wrap_here (" "); - next_address = VALUE_ADDRESS (val) - + print_insn (VALUE_ADDRESS (val), stream); - next_section = VALUE_BFD_SECTION (val); - break; - - default: - if (format == 0 - || TYPE_CODE (type) == TYPE_CODE_ARRAY - || TYPE_CODE (type) == TYPE_CODE_STRING - || TYPE_CODE (type) == TYPE_CODE_STRUCT - || TYPE_CODE (type) == TYPE_CODE_UNION) - /* If format is 0, use the 'natural' format for - * that type of value. If the type is non-scalar, - * we have to use language rules to print it as - * a series of scalars. - */ - value_print (val, stream, format, Val_pretty_default); - else - /* User specified format, so don't look to the - * the type to tell us what to do. - */ - print_scalar_formatted (VALUE_CONTENTS (val), type, - format, size, stream); - } -} - -/* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR, - according to letters FORMAT and SIZE on STREAM. - FORMAT may not be zero. Formats s and i are not supported at this level. - - This is how the elements of an array or structure are printed - with a format. */ - -void -print_scalar_formatted (char *valaddr, struct type *type, int format, int size, - struct ui_file *stream) -{ - LONGEST val_long; - unsigned int len = TYPE_LENGTH (type); - - if (len > sizeof (LONGEST) - && (format == 't' - || format == 'c' - || format == 'o' - || format == 'u' - || format == 'd' - || format == 'x')) - { - if (!TYPE_UNSIGNED (type) - || !extract_long_unsigned_integer (valaddr, len, &val_long)) - { - /* We can't print it normally, but we can print it in hex. - Printing it in the wrong radix is more useful than saying - "use /x, you dummy". */ - /* FIXME: we could also do octal or binary if that was the - desired format. */ - /* FIXME: we should be using the size field to give us a - minimum field width to print. */ - - if (format == 'o') - print_octal_chars (stream, valaddr, len); - else if (format == 'd') - print_decimal_chars (stream, valaddr, len); - else if (format == 't') - print_binary_chars (stream, valaddr, len); - else - /* replace with call to print_hex_chars? Looks - like val_print_type_code_int is redoing - work. - edie */ - - val_print_type_code_int (type, valaddr, stream); - - return; - } - - /* If we get here, extract_long_unsigned_integer set val_long. */ - } - else if (format != 'f') - val_long = unpack_long (type, valaddr); - - /* If the value is a pointer, and pointers and addresses are not the - same, then at this point, the value's length is TARGET_ADDR_BIT, not - TYPE_LENGTH (type). */ - if (TYPE_CODE (type) == TYPE_CODE_PTR) - len = TARGET_ADDR_BIT; - - /* If we are printing it as unsigned, truncate it in case it is actually - a negative signed value (e.g. "print/u (short)-1" should print 65535 - (if shorts are 16 bits) instead of 4294967295). */ - if (format != 'd') - { - if (len < sizeof (LONGEST)) - val_long &= ((LONGEST) 1 << HOST_CHAR_BIT * len) - 1; - } - - switch (format) - { - case 'x': - if (!size) - { - /* no size specified, like in print. Print varying # of digits. */ - print_longest (stream, 'x', 1, val_long); - } - else - switch (size) - { - case 'b': - case 'h': - case 'w': - case 'g': - print_longest (stream, size, 1, val_long); - break; - default: - error ("Undefined output size \"%c\".", size); - } - break; - - case 'd': - print_longest (stream, 'd', 1, val_long); - break; - - case 'u': - print_longest (stream, 'u', 0, val_long); - break; - - case 'o': - if (val_long) - print_longest (stream, 'o', 1, val_long); - else - fprintf_filtered (stream, "0"); - break; - - case 'a': - { - CORE_ADDR addr = unpack_pointer (type, valaddr); - print_address (addr, stream); - } - break; - - case 'c': - value_print (value_from_longest (builtin_type_true_char, val_long), - stream, 0, Val_pretty_default); - break; - - case 'f': - if (len == TYPE_LENGTH (builtin_type_float)) - type = builtin_type_float; - else if (len == TYPE_LENGTH (builtin_type_double)) - type = builtin_type_double; - else if (len == TYPE_LENGTH (builtin_type_long_double)) - type = builtin_type_long_double; - print_floating (valaddr, type, stream); - break; - - case 0: - internal_error (__FILE__, __LINE__, "failed internal consistency check"); - - case 't': - /* Binary; 't' stands for "two". */ - { - char bits[8 * (sizeof val_long) + 1]; - char buf[8 * (sizeof val_long) + 32]; - char *cp = bits; - int width; - - if (!size) - width = 8 * (sizeof val_long); - else - switch (size) - { - case 'b': - width = 8; - break; - case 'h': - width = 16; - break; - case 'w': - width = 32; - break; - case 'g': - width = 64; - break; - default: - error ("Undefined output size \"%c\".", size); - } - - bits[width] = '\0'; - while (width-- > 0) - { - bits[width] = (val_long & 1) ? '1' : '0'; - val_long >>= 1; - } - if (!size) - { - while (*cp && *cp == '0') - cp++; - if (*cp == '\0') - cp--; - } - strcpy (buf, local_binary_format_prefix ()); - strcat (buf, cp); - strcat (buf, local_binary_format_suffix ()); - fprintf_filtered (stream, buf); - } - break; - - default: - error ("Undefined output format \"%c\".", format); - } -} - -/* Specify default address for `x' command. - `info lines' uses this. */ - -void -set_next_address (CORE_ADDR addr) -{ - next_address = addr; - - /* Make address available to the user as $_. */ - set_internalvar (lookup_internalvar ("_"), - value_from_pointer (lookup_pointer_type (builtin_type_void), - addr)); -} - -/* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM, - after LEADIN. Print nothing if no symbolic name is found nearby. - Optionally also print source file and line number, if available. - DO_DEMANGLE controls whether to print a symbol in its native "raw" form, - or to interpret it as a possible C++ name and convert it back to source - form. However note that DO_DEMANGLE can be overridden by the specific - settings of the demangle and asm_demangle variables. */ - -void -print_address_symbolic (CORE_ADDR addr, struct ui_file *stream, int do_demangle, - char *leadin) -{ - char *name = NULL; - char *filename = NULL; - int unmapped = 0; - int offset = 0; - int line = 0; - - /* throw away both name and filename */ - struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &name); - make_cleanup (free_current_contents, &filename); - - if (build_address_symbolic (addr, do_demangle, &name, &offset, &filename, &line, &unmapped)) - { - do_cleanups (cleanup_chain); - return; - } - - fputs_filtered (leadin, stream); - if (unmapped) - fputs_filtered ("<*", stream); - else - fputs_filtered ("<", stream); - fputs_filtered (name, stream); - if (offset != 0) - fprintf_filtered (stream, "+%u", (unsigned int) offset); - - /* Append source filename and line number if desired. Give specific - line # of this addr, if we have it; else line # of the nearest symbol. */ - if (print_symbol_filename && filename != NULL) - { - if (line != -1) - fprintf_filtered (stream, " at %s:%d", filename, line); - else - fprintf_filtered (stream, " in %s", filename); - } - if (unmapped) - fputs_filtered ("*>", stream); - else - fputs_filtered (">", stream); - - do_cleanups (cleanup_chain); -} - -/* Given an address ADDR return all the elements needed to print the - address in a symbolic form. NAME can be mangled or not depending - on DO_DEMANGLE (and also on the asm_demangle global variable, - manipulated via ''set print asm-demangle''). Return 0 in case of - success, when all the info in the OUT paramters is valid. Return 1 - otherwise. */ -int -build_address_symbolic (CORE_ADDR addr, /* IN */ - int do_demangle, /* IN */ - char **name, /* OUT */ - int *offset, /* OUT */ - char **filename, /* OUT */ - int *line, /* OUT */ - int *unmapped) /* OUT */ -{ - struct minimal_symbol *msymbol; - struct symbol *symbol; - struct symtab *symtab = 0; - CORE_ADDR name_location = 0; - asection *section = 0; - char *name_temp = ""; - - /* Let's say it is unmapped. */ - *unmapped = 0; - - /* Determine if the address is in an overlay, and whether it is - mapped. */ - if (overlay_debugging) - { - section = find_pc_overlay (addr); - if (pc_in_unmapped_range (addr, section)) - { - *unmapped = 1; - addr = overlay_mapped_address (addr, section); - } - } - - /* On some targets, add in extra "flag" bits to PC for - disassembly. This should ensure that "rounding errors" in - symbol addresses that are masked for disassembly favour the - the correct symbol. */ - -#ifdef GDB_TARGET_UNMASK_DISAS_PC - addr = GDB_TARGET_UNMASK_DISAS_PC (addr); -#endif - - /* First try to find the address in the symbol table, then - in the minsyms. Take the closest one. */ - - /* This is defective in the sense that it only finds text symbols. So - really this is kind of pointless--we should make sure that the - minimal symbols have everything we need (by changing that we could - save some memory, but for many debug format--ELF/DWARF or - anything/stabs--it would be inconvenient to eliminate those minimal - symbols anyway). */ - msymbol = lookup_minimal_symbol_by_pc_section (addr, section); - symbol = find_pc_sect_function (addr, section); - - if (symbol) - { - name_location = BLOCK_START (SYMBOL_BLOCK_VALUE (symbol)); - if (do_demangle) - name_temp = SYMBOL_SOURCE_NAME (symbol); - else - name_temp = SYMBOL_LINKAGE_NAME (symbol); - } - - if (msymbol != NULL) - { - if (SYMBOL_VALUE_ADDRESS (msymbol) > name_location || symbol == NULL) - { - /* The msymbol is closer to the address than the symbol; - use the msymbol instead. */ - symbol = 0; - symtab = 0; - name_location = SYMBOL_VALUE_ADDRESS (msymbol); - if (do_demangle) - name_temp = SYMBOL_SOURCE_NAME (msymbol); - else - name_temp = SYMBOL_LINKAGE_NAME (msymbol); - } - } - if (symbol == NULL && msymbol == NULL) - return 1; - - /* On some targets, mask out extra "flag" bits from PC for handsome - disassembly. */ - -#ifdef GDB_TARGET_MASK_DISAS_PC - name_location = GDB_TARGET_MASK_DISAS_PC (name_location); - addr = GDB_TARGET_MASK_DISAS_PC (addr); -#endif - - /* If the nearest symbol is too far away, don't print anything symbolic. */ - - /* For when CORE_ADDR is larger than unsigned int, we do math in - CORE_ADDR. But when we detect unsigned wraparound in the - CORE_ADDR math, we ignore this test and print the offset, - because addr+max_symbolic_offset has wrapped through the end - of the address space back to the beginning, giving bogus comparison. */ - if (addr > name_location + max_symbolic_offset - && name_location + max_symbolic_offset > name_location) - return 1; - - *offset = addr - name_location; - - *name = xstrdup (name_temp); - - if (print_symbol_filename) - { - struct symtab_and_line sal; - - sal = find_pc_sect_line (addr, section, 0); - - if (sal.symtab) - { - *filename = xstrdup (sal.symtab->filename); - *line = sal.line; - } - else if (symtab && symbol && symbol->line) - { - *filename = xstrdup (symtab->filename); - *line = symbol->line; - } - else if (symtab) - { - *filename = xstrdup (symtab->filename); - *line = -1; - } - } - return 0; -} - -/* Print address ADDR on STREAM. USE_LOCAL means the same thing as for - print_longest. */ -void -print_address_numeric (CORE_ADDR addr, int use_local, struct ui_file *stream) -{ - /* Truncate address to the size of a target address, avoiding shifts - larger or equal than the width of a CORE_ADDR. The local - variable ADDR_BIT stops the compiler reporting a shift overflow - when it won't occur. */ - /* NOTE: This assumes that the significant address information is - kept in the least significant bits of ADDR - the upper bits were - either zero or sign extended. Should ADDRESS_TO_POINTER() or - some ADDRESS_TO_PRINTABLE() be used to do the conversion? */ - - int addr_bit = TARGET_ADDR_BIT; - - if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) - addr &= ((CORE_ADDR) 1 << addr_bit) - 1; - print_longest (stream, 'x', use_local, (ULONGEST) addr); -} - -/* Print address ADDR symbolically on STREAM. - First print it as a number. Then perhaps print - <SYMBOL + OFFSET> after the number. */ - -void -print_address (CORE_ADDR addr, struct ui_file *stream) -{ - print_address_numeric (addr, 1, stream); - print_address_symbolic (addr, stream, asm_demangle, " "); -} - -/* Print address ADDR symbolically on STREAM. Parameter DEMANGLE - controls whether to print the symbolic name "raw" or demangled. - Global setting "addressprint" controls whether to print hex address - or not. */ - -void -print_address_demangle (CORE_ADDR addr, struct ui_file *stream, int do_demangle) -{ - if (addr == 0) - { - fprintf_filtered (stream, "0"); - } - else if (addressprint) - { - print_address_numeric (addr, 1, stream); - print_address_symbolic (addr, stream, do_demangle, " "); - } - else - { - print_address_symbolic (addr, stream, do_demangle, ""); - } -} - - -/* These are the types that $__ will get after an examine command of one - of these sizes. */ - -static struct type *examine_i_type; - -static struct type *examine_b_type; -static struct type *examine_h_type; -static struct type *examine_w_type; -static struct type *examine_g_type; - -/* Examine data at address ADDR in format FMT. - Fetch it from memory and print on gdb_stdout. */ - -static void -do_examine (struct format_data fmt, CORE_ADDR addr, asection *sect) -{ - register char format = 0; - register char size; - register int count = 1; - struct type *val_type = NULL; - register int i; - register int maxelts; - - format = fmt.format; - size = fmt.size; - count = fmt.count; - next_address = addr; - next_section = sect; - - /* String or instruction format implies fetch single bytes - regardless of the specified size. */ - if (format == 's' || format == 'i') - size = 'b'; - - if (format == 'i') - val_type = examine_i_type; - else if (size == 'b') - val_type = examine_b_type; - else if (size == 'h') - val_type = examine_h_type; - else if (size == 'w') - val_type = examine_w_type; - else if (size == 'g') - val_type = examine_g_type; - - maxelts = 8; - if (size == 'w') - maxelts = 4; - if (size == 'g') - maxelts = 2; - if (format == 's' || format == 'i') - maxelts = 1; - - /* Print as many objects as specified in COUNT, at most maxelts per line, - with the address of the next one at the start of each line. */ - - while (count > 0) - { - QUIT; - print_address (next_address, gdb_stdout); - printf_filtered (":"); - for (i = maxelts; - i > 0 && count > 0; - i--, count--) - { - printf_filtered ("\t"); - /* Note that print_formatted sets next_address for the next - object. */ - last_examine_address = next_address; - - if (last_examine_value) - value_free (last_examine_value); - - /* The value to be displayed is not fetched greedily. - Instead, to avoid the posibility of a fetched value not - being used, its retreval is delayed until the print code - uses it. When examining an instruction stream, the - disassembler will perform its own memory fetch using just - the address stored in LAST_EXAMINE_VALUE. FIXME: Should - the disassembler be modified so that LAST_EXAMINE_VALUE - is left with the byte sequence from the last complete - instruction fetched from memory? */ - last_examine_value = value_at_lazy (val_type, next_address, sect); - - if (last_examine_value) - release_value (last_examine_value); - - print_formatted (last_examine_value, format, size, gdb_stdout); - } - printf_filtered ("\n"); - gdb_flush (gdb_stdout); - } -} - -static void -validate_format (struct format_data fmt, char *cmdname) -{ - if (fmt.size != 0) - error ("Size letters are meaningless in \"%s\" command.", cmdname); - if (fmt.count != 1) - error ("Item count other than 1 is meaningless in \"%s\" command.", - cmdname); - if (fmt.format == 'i' || fmt.format == 's') - error ("Format letter \"%c\" is meaningless in \"%s\" command.", - fmt.format, cmdname); -} - -/* Evaluate string EXP as an expression in the current language and - print the resulting value. EXP may contain a format specifier as the - first argument ("/x myvar" for example, to print myvar in hex). - */ - -static void -print_command_1 (char *exp, int inspect, int voidprint) -{ - struct expression *expr; - register struct cleanup *old_chain = 0; - register char format = 0; - struct value *val; - struct format_data fmt; - int cleanup = 0; - - /* Pass inspect flag to the rest of the print routines in a global (sigh). */ - inspect_it = inspect; - - if (exp && *exp == '/') - { - exp++; - fmt = decode_format (&exp, last_format, 0); - validate_format (fmt, "print"); - last_format = format = fmt.format; - } - else - { - fmt.count = 1; - fmt.format = 0; - fmt.size = 0; - } - - if (exp && *exp) - { - struct type *type; - expr = parse_expression (exp); - old_chain = make_cleanup (free_current_contents, &expr); - cleanup = 1; - val = evaluate_expression (expr); - } - else - val = access_value_history (0); - - if (voidprint || (val && VALUE_TYPE (val) && - TYPE_CODE (VALUE_TYPE (val)) != TYPE_CODE_VOID)) - { - int histindex = record_latest_value (val); - - if (histindex >= 0) - annotate_value_history_begin (histindex, VALUE_TYPE (val)); - else - annotate_value_begin (VALUE_TYPE (val)); - - if (inspect) - printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"", exp, histindex); - else if (histindex >= 0) - printf_filtered ("$%d = ", histindex); - - if (histindex >= 0) - annotate_value_history_value (); - - print_formatted (val, format, fmt.size, gdb_stdout); - printf_filtered ("\n"); - - if (histindex >= 0) - annotate_value_history_end (); - else - annotate_value_end (); - - if (inspect) - printf_unfiltered ("\") )\030"); - } - - if (cleanup) - do_cleanups (old_chain); - inspect_it = 0; /* Reset print routines to normal */ -} - -/* ARGSUSED */ -static void -print_command (char *exp, int from_tty) -{ - print_command_1 (exp, 0, 1); -} - -/* Same as print, except in epoch, it gets its own window */ -/* ARGSUSED */ -static void -inspect_command (char *exp, int from_tty) -{ - extern int epoch_interface; - - print_command_1 (exp, epoch_interface, 1); -} - -/* Same as print, except it doesn't print void results. */ -/* ARGSUSED */ -static void -call_command (char *exp, int from_tty) -{ - print_command_1 (exp, 0, 0); -} - -/* ARGSUSED */ -void -output_command (char *exp, int from_tty) -{ - struct expression *expr; - register struct cleanup *old_chain; - register char format = 0; - struct value *val; - struct format_data fmt; - - if (exp && *exp == '/') - { - exp++; - fmt = decode_format (&exp, 0, 0); - validate_format (fmt, "output"); - format = fmt.format; - } - - expr = parse_expression (exp); - old_chain = make_cleanup (free_current_contents, &expr); - - val = evaluate_expression (expr); - - annotate_value_begin (VALUE_TYPE (val)); - - print_formatted (val, format, fmt.size, gdb_stdout); - - annotate_value_end (); - - wrap_here (""); - gdb_flush (gdb_stdout); - - do_cleanups (old_chain); -} - -/* ARGSUSED */ -static void -set_command (char *exp, int from_tty) -{ - struct expression *expr = parse_expression (exp); - register struct cleanup *old_chain = - make_cleanup (free_current_contents, &expr); - evaluate_expression (expr); - do_cleanups (old_chain); -} - -/* ARGSUSED */ -static void -sym_info (char *arg, int from_tty) -{ - struct minimal_symbol *msymbol; - struct objfile *objfile; - struct obj_section *osect; - asection *sect; - CORE_ADDR addr, sect_addr; - int matches = 0; - unsigned int offset; - - if (!arg) - error_no_arg ("address"); - - addr = parse_and_eval_address (arg); - ALL_OBJSECTIONS (objfile, osect) - { - sect = osect->the_bfd_section; - sect_addr = overlay_mapped_address (addr, sect); - - if (osect->addr <= sect_addr && sect_addr < osect->endaddr && - (msymbol = lookup_minimal_symbol_by_pc_section (sect_addr, sect))) - { - matches = 1; - offset = sect_addr - SYMBOL_VALUE_ADDRESS (msymbol); - if (offset) - printf_filtered ("%s + %u in ", - SYMBOL_SOURCE_NAME (msymbol), offset); - else - printf_filtered ("%s in ", - SYMBOL_SOURCE_NAME (msymbol)); - if (pc_in_unmapped_range (addr, sect)) - printf_filtered ("load address range of "); - if (section_is_overlay (sect)) - printf_filtered ("%s overlay ", - section_is_mapped (sect) ? "mapped" : "unmapped"); - printf_filtered ("section %s", sect->name); - printf_filtered ("\n"); - } - } - if (matches == 0) - printf_filtered ("No symbol matches %s.\n", arg); -} - -/* ARGSUSED */ -static void -address_info (char *exp, int from_tty) -{ - register struct symbol *sym; - register struct minimal_symbol *msymbol; - register long val; - register long basereg; - asection *section; - CORE_ADDR load_addr; - int is_a_field_of_this; /* C++: lookup_symbol sets this to nonzero - if exp is a field of `this'. */ - - if (exp == 0) - error ("Argument required."); - - sym = lookup_symbol (exp, get_selected_block (0), VAR_NAMESPACE, - &is_a_field_of_this, (struct symtab **) NULL); - if (sym == NULL) - { - if (is_a_field_of_this) - { - printf_filtered ("Symbol \""); - fprintf_symbol_filtered (gdb_stdout, exp, - current_language->la_language, DMGL_ANSI); - printf_filtered ("\" is a field of the local class variable `this'\n"); - return; - } - - msymbol = lookup_minimal_symbol (exp, NULL, NULL); - - if (msymbol != NULL) - { - load_addr = SYMBOL_VALUE_ADDRESS (msymbol); - - printf_filtered ("Symbol \""); - fprintf_symbol_filtered (gdb_stdout, exp, - current_language->la_language, DMGL_ANSI); - printf_filtered ("\" is at "); - print_address_numeric (load_addr, 1, gdb_stdout); - printf_filtered (" in a file compiled without debugging"); - section = SYMBOL_BFD_SECTION (msymbol); - if (section_is_overlay (section)) - { - load_addr = overlay_unmapped_address (load_addr, section); - printf_filtered (",\n -- loaded at "); - print_address_numeric (load_addr, 1, gdb_stdout); - printf_filtered (" in overlay section %s", section->name); - } - printf_filtered (".\n"); - } - else - error ("No symbol \"%s\" in current context.", exp); - return; - } - - printf_filtered ("Symbol \""); - fprintf_symbol_filtered (gdb_stdout, SYMBOL_NAME (sym), - current_language->la_language, DMGL_ANSI); - printf_filtered ("\" is "); - val = SYMBOL_VALUE (sym); - basereg = SYMBOL_BASEREG (sym); - section = SYMBOL_BFD_SECTION (sym); - - switch (SYMBOL_CLASS (sym)) - { - case LOC_CONST: - case LOC_CONST_BYTES: - printf_filtered ("constant"); - break; - - case LOC_LABEL: - printf_filtered ("a label at address "); - print_address_numeric (load_addr = SYMBOL_VALUE_ADDRESS (sym), - 1, gdb_stdout); - if (section_is_overlay (section)) - { - load_addr = overlay_unmapped_address (load_addr, section); - printf_filtered (",\n -- loaded at "); - print_address_numeric (load_addr, 1, gdb_stdout); - printf_filtered (" in overlay section %s", section->name); - } - break; - - case LOC_REGISTER: - printf_filtered ("a variable in register %s", REGISTER_NAME (val)); - break; - - case LOC_STATIC: - printf_filtered ("static storage at address "); - print_address_numeric (load_addr = SYMBOL_VALUE_ADDRESS (sym), - 1, gdb_stdout); - if (section_is_overlay (section)) - { - load_addr = overlay_unmapped_address (load_addr, section); - printf_filtered (",\n -- loaded at "); - print_address_numeric (load_addr, 1, gdb_stdout); - printf_filtered (" in overlay section %s", section->name); - } - break; - - case LOC_INDIRECT: - printf_filtered ("external global (indirect addressing), at address *("); - print_address_numeric (load_addr = SYMBOL_VALUE_ADDRESS (sym), - 1, gdb_stdout); - printf_filtered (")"); - if (section_is_overlay (section)) - { - load_addr = overlay_unmapped_address (load_addr, section); - printf_filtered (",\n -- loaded at "); - print_address_numeric (load_addr, 1, gdb_stdout); - printf_filtered (" in overlay section %s", section->name); - } - break; - - case LOC_REGPARM: - printf_filtered ("an argument in register %s", REGISTER_NAME (val)); - break; - - case LOC_REGPARM_ADDR: - printf_filtered ("address of an argument in register %s", REGISTER_NAME (val)); - break; - - case LOC_ARG: - printf_filtered ("an argument at offset %ld", val); - break; - - case LOC_LOCAL_ARG: - printf_filtered ("an argument at frame offset %ld", val); - break; - - case LOC_LOCAL: - printf_filtered ("a local variable at frame offset %ld", val); - break; - - case LOC_REF_ARG: - printf_filtered ("a reference argument at offset %ld", val); - break; - - case LOC_BASEREG: - printf_filtered ("a variable at offset %ld from register %s", - val, REGISTER_NAME (basereg)); - break; - - case LOC_BASEREG_ARG: - printf_filtered ("an argument at offset %ld from register %s", - val, REGISTER_NAME (basereg)); - break; - - case LOC_TYPEDEF: - printf_filtered ("a typedef"); - break; - - case LOC_BLOCK: - printf_filtered ("a function at address "); -#ifdef GDB_TARGET_MASK_DISAS_PC - print_address_numeric - (load_addr = GDB_TARGET_MASK_DISAS_PC (BLOCK_START (SYMBOL_BLOCK_VALUE (sym))), - 1, gdb_stdout); -#else - print_address_numeric (load_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym)), - 1, gdb_stdout); -#endif - if (section_is_overlay (section)) - { - load_addr = overlay_unmapped_address (load_addr, section); - printf_filtered (",\n -- loaded at "); - print_address_numeric (load_addr, 1, gdb_stdout); - printf_filtered (" in overlay section %s", section->name); - } - break; - - case LOC_UNRESOLVED: - { - struct minimal_symbol *msym; - - msym = lookup_minimal_symbol (SYMBOL_NAME (sym), NULL, NULL); - if (msym == NULL) - printf_filtered ("unresolved"); - else - { - section = SYMBOL_BFD_SECTION (msym); - printf_filtered ("static storage at address "); - print_address_numeric (load_addr = SYMBOL_VALUE_ADDRESS (msym), - 1, gdb_stdout); - if (section_is_overlay (section)) - { - load_addr = overlay_unmapped_address (load_addr, section); - printf_filtered (",\n -- loaded at "); - print_address_numeric (load_addr, 1, gdb_stdout); - printf_filtered (" in overlay section %s", section->name); - } - } - } - break; - - case LOC_THREAD_LOCAL_STATIC: - printf_filtered ( - "a thread-local variable at offset %ld from the thread base register %s", - val, REGISTER_NAME (basereg)); - break; - - case LOC_OPTIMIZED_OUT: - printf_filtered ("optimized out"); - break; - - default: - printf_filtered ("of unknown (botched) type"); - break; - } - printf_filtered (".\n"); -} - -void -x_command (char *exp, int from_tty) -{ - struct expression *expr; - struct format_data fmt; - struct cleanup *old_chain; - struct value *val; - - fmt.format = last_format; - fmt.size = last_size; - fmt.count = 1; - - if (exp && *exp == '/') - { - exp++; - fmt = decode_format (&exp, last_format, last_size); - } - - /* If we have an expression, evaluate it and use it as the address. */ - - if (exp != 0 && *exp != 0) - { - expr = parse_expression (exp); - /* Cause expression not to be there any more - if this command is repeated with Newline. - But don't clobber a user-defined command's definition. */ - if (from_tty) - *exp = 0; - old_chain = make_cleanup (free_current_contents, &expr); - val = evaluate_expression (expr); - if (TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_REF) - val = value_ind (val); - /* In rvalue contexts, such as this, functions are coerced into - pointers to functions. This makes "x/i main" work. */ - if (/* last_format == 'i' && */ - TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_FUNC - && VALUE_LVAL (val) == lval_memory) - next_address = VALUE_ADDRESS (val); - else - next_address = value_as_address (val); - if (VALUE_BFD_SECTION (val)) - next_section = VALUE_BFD_SECTION (val); - do_cleanups (old_chain); - } - - do_examine (fmt, next_address, next_section); - - /* If the examine succeeds, we remember its size and format for next time. */ - last_size = fmt.size; - last_format = fmt.format; - - /* Set a couple of internal variables if appropriate. */ - if (last_examine_value) - { - /* Make last address examined available to the user as $_. Use - the correct pointer type. */ - struct type *pointer_type - = lookup_pointer_type (VALUE_TYPE (last_examine_value)); - set_internalvar (lookup_internalvar ("_"), - value_from_pointer (pointer_type, - last_examine_address)); - - /* Make contents of last address examined available to the user as $__. */ - /* If the last value has not been fetched from memory then don't - fetch it now - instead mark it by voiding the $__ variable. */ - if (VALUE_LAZY (last_examine_value)) - set_internalvar (lookup_internalvar ("__"), - allocate_value (builtin_type_void)); - else - set_internalvar (lookup_internalvar ("__"), last_examine_value); - } -} - - -/* Add an expression to the auto-display chain. - Specify the expression. */ - -static void -display_command (char *exp, int from_tty) -{ - struct format_data fmt; - register struct expression *expr; - register struct display *new; - int display_it = 1; - -#if defined(TUI) - if (tui_version && *exp == '$') - display_it = (tui_set_layout (exp) == TUI_FAILURE); -#endif - - if (display_it) - { - if (exp == 0) - { - do_displays (); - return; - } - - if (*exp == '/') - { - exp++; - fmt = decode_format (&exp, 0, 0); - if (fmt.size && fmt.format == 0) - fmt.format = 'x'; - if (fmt.format == 'i' || fmt.format == 's') - fmt.size = 'b'; - } - else - { - fmt.format = 0; - fmt.size = 0; - fmt.count = 0; - } - - innermost_block = 0; - expr = parse_expression (exp); - - new = (struct display *) xmalloc (sizeof (struct display)); - - new->exp = expr; - new->block = innermost_block; - new->next = display_chain; - new->number = ++display_number; - new->format = fmt; - new->enabled_p = 1; - display_chain = new; - - if (from_tty && target_has_execution) - do_one_display (new); - - dont_repeat (); - } -} - -static void -free_display (struct display *d) -{ - xfree (d->exp); - xfree (d); -} - -/* Clear out the display_chain. - Done when new symtabs are loaded, since this invalidates - the types stored in many expressions. */ - -void -clear_displays (void) -{ - register struct display *d; - - while ((d = display_chain) != NULL) - { - xfree (d->exp); - display_chain = d->next; - xfree (d); - } -} - -/* Delete the auto-display number NUM. */ - -static void -delete_display (int num) -{ - register struct display *d1, *d; - - if (!display_chain) - error ("No display number %d.", num); - - if (display_chain->number == num) - { - d1 = display_chain; - display_chain = d1->next; - free_display (d1); - } - else - for (d = display_chain;; d = d->next) - { - if (d->next == 0) - error ("No display number %d.", num); - if (d->next->number == num) - { - d1 = d->next; - d->next = d1->next; - free_display (d1); - break; - } - } -} - -/* Delete some values from the auto-display chain. - Specify the element numbers. */ - -static void -undisplay_command (char *args, int from_tty) -{ - register char *p = args; - register char *p1; - register int num; - - if (args == 0) - { - if (query ("Delete all auto-display expressions? ")) - clear_displays (); - dont_repeat (); - return; - } - - while (*p) - { - p1 = p; - while (*p1 >= '0' && *p1 <= '9') - p1++; - if (*p1 && *p1 != ' ' && *p1 != '\t') - error ("Arguments must be display numbers."); - - num = atoi (p); - - delete_display (num); - - p = p1; - while (*p == ' ' || *p == '\t') - p++; - } - dont_repeat (); -} - -/* Display a single auto-display. - Do nothing if the display cannot be printed in the current context, - or if the display is disabled. */ - -static void -do_one_display (struct display *d) -{ - int within_current_scope; - - if (d->enabled_p == 0) - return; - - if (d->block) - within_current_scope = contained_in (get_selected_block (0), d->block); - else - within_current_scope = 1; - if (!within_current_scope) - return; - - current_display_number = d->number; - - annotate_display_begin (); - printf_filtered ("%d", d->number); - annotate_display_number_end (); - printf_filtered (": "); - if (d->format.size) - { - CORE_ADDR addr; - struct value *val; - - annotate_display_format (); - - printf_filtered ("x/"); - if (d->format.count != 1) - printf_filtered ("%d", d->format.count); - printf_filtered ("%c", d->format.format); - if (d->format.format != 'i' && d->format.format != 's') - printf_filtered ("%c", d->format.size); - printf_filtered (" "); - - annotate_display_expression (); - - print_expression (d->exp, gdb_stdout); - annotate_display_expression_end (); - - if (d->format.count != 1) - printf_filtered ("\n"); - else - printf_filtered (" "); - - val = evaluate_expression (d->exp); - addr = value_as_address (val); - if (d->format.format == 'i') - addr = ADDR_BITS_REMOVE (addr); - - annotate_display_value (); - - do_examine (d->format, addr, VALUE_BFD_SECTION (val)); - } - else - { - annotate_display_format (); - - if (d->format.format) - printf_filtered ("/%c ", d->format.format); - - annotate_display_expression (); - - print_expression (d->exp, gdb_stdout); - annotate_display_expression_end (); - - printf_filtered (" = "); - - annotate_display_expression (); - - print_formatted (evaluate_expression (d->exp), - d->format.format, d->format.size, gdb_stdout); - printf_filtered ("\n"); - } - - annotate_display_end (); - - gdb_flush (gdb_stdout); - current_display_number = -1; -} - -/* Display all of the values on the auto-display chain which can be - evaluated in the current scope. */ - -void -do_displays (void) -{ - register struct display *d; - - for (d = display_chain; d; d = d->next) - do_one_display (d); -} - -/* Delete the auto-display which we were in the process of displaying. - This is done when there is an error or a signal. */ - -void -disable_display (int num) -{ - register struct display *d; - - for (d = display_chain; d; d = d->next) - if (d->number == num) - { - d->enabled_p = 0; - return; - } - printf_unfiltered ("No display number %d.\n", num); -} - -void -disable_current_display (void) -{ - if (current_display_number >= 0) - { - disable_display (current_display_number); - fprintf_unfiltered (gdb_stderr, "Disabling display %d to avoid infinite recursion.\n", - current_display_number); - } - current_display_number = -1; -} - -static void -display_info (char *ignore, int from_tty) -{ - register struct display *d; - - if (!display_chain) - printf_unfiltered ("There are no auto-display expressions now.\n"); - else - printf_filtered ("Auto-display expressions now in effect:\n\ -Num Enb Expression\n"); - - for (d = display_chain; d; d = d->next) - { - printf_filtered ("%d: %c ", d->number, "ny"[(int) d->enabled_p]); - if (d->format.size) - printf_filtered ("/%d%c%c ", d->format.count, d->format.size, - d->format.format); - else if (d->format.format) - printf_filtered ("/%c ", d->format.format); - print_expression (d->exp, gdb_stdout); - if (d->block && !contained_in (get_selected_block (0), d->block)) - printf_filtered (" (cannot be evaluated in the current context)"); - printf_filtered ("\n"); - gdb_flush (gdb_stdout); - } -} - -static void -enable_display (char *args, int from_tty) -{ - register char *p = args; - register char *p1; - register int num; - register struct display *d; - - if (p == 0) - { - for (d = display_chain; d; d = d->next) - d->enabled_p = 1; - } - else - while (*p) - { - p1 = p; - while (*p1 >= '0' && *p1 <= '9') - p1++; - if (*p1 && *p1 != ' ' && *p1 != '\t') - error ("Arguments must be display numbers."); - - num = atoi (p); - - for (d = display_chain; d; d = d->next) - if (d->number == num) - { - d->enabled_p = 1; - goto win; - } - printf_unfiltered ("No display number %d.\n", num); - win: - p = p1; - while (*p == ' ' || *p == '\t') - p++; - } -} - -/* ARGSUSED */ -static void -disable_display_command (char *args, int from_tty) -{ - register char *p = args; - register char *p1; - register struct display *d; - - if (p == 0) - { - for (d = display_chain; d; d = d->next) - d->enabled_p = 0; - } - else - while (*p) - { - p1 = p; - while (*p1 >= '0' && *p1 <= '9') - p1++; - if (*p1 && *p1 != ' ' && *p1 != '\t') - error ("Arguments must be display numbers."); - - disable_display (atoi (p)); - - p = p1; - while (*p == ' ' || *p == '\t') - p++; - } -} - - -/* Print the value in stack frame FRAME of a variable - specified by a struct symbol. */ - -void -print_variable_value (struct symbol *var, struct frame_info *frame, - struct ui_file *stream) -{ - struct value *val = read_var_value (var, frame); - - value_print (val, stream, 0, Val_pretty_default); -} - -/* Print the arguments of a stack frame, given the function FUNC - running in that frame (as a symbol), the info on the frame, - and the number of args according to the stack frame (or -1 if unknown). */ - -/* References here and elsewhere to "number of args according to the - stack frame" appear in all cases to refer to "number of ints of args - according to the stack frame". At least for VAX, i386, isi. */ - -void -print_frame_args (struct symbol *func, struct frame_info *fi, int num, - struct ui_file *stream) -{ - struct block *b = NULL; - int first = 1; - register int i; - register struct symbol *sym; - struct value *val; - /* Offset of next stack argument beyond the one we have seen that is - at the highest offset. - -1 if we haven't come to a stack argument yet. */ - long highest_offset = -1; - int arg_size; - /* Number of ints of arguments that we have printed so far. */ - int args_printed = 0; - struct cleanup *old_chain, *list_chain; - struct ui_stream *stb; - - stb = ui_out_stream_new (uiout); - old_chain = make_cleanup_ui_out_stream_delete (stb); - - if (func) - { - b = SYMBOL_BLOCK_VALUE (func); - /* Function blocks are order sensitive, and thus should not be - hashed. */ - gdb_assert (BLOCK_HASHTABLE (b) == 0); - - ALL_BLOCK_SYMBOLS (b, i, sym) - { - QUIT; - - /* Keep track of the highest stack argument offset seen, and - skip over any kinds of symbols we don't care about. */ - - switch (SYMBOL_CLASS (sym)) - { - case LOC_ARG: - case LOC_REF_ARG: - { - long current_offset = SYMBOL_VALUE (sym); - arg_size = TYPE_LENGTH (SYMBOL_TYPE (sym)); - - /* Compute address of next argument by adding the size of - this argument and rounding to an int boundary. */ - current_offset = - ((current_offset + arg_size + sizeof (int) - 1) - & ~(sizeof (int) - 1)); - - /* If this is the highest offset seen yet, set highest_offset. */ - if (highest_offset == -1 - || (current_offset > highest_offset)) - highest_offset = current_offset; - - /* Add the number of ints we're about to print to args_printed. */ - args_printed += (arg_size + sizeof (int) - 1) / sizeof (int); - } - - /* We care about types of symbols, but don't need to keep track of - stack offsets in them. */ - case LOC_REGPARM: - case LOC_REGPARM_ADDR: - case LOC_LOCAL_ARG: - case LOC_BASEREG_ARG: - break; - - /* Other types of symbols we just skip over. */ - default: - continue; - } - - /* We have to look up the symbol because arguments can have - two entries (one a parameter, one a local) and the one we - want is the local, which lookup_symbol will find for us. - This includes gcc1 (not gcc2) on the sparc when passing a - small structure and gcc2 when the argument type is float - and it is passed as a double and converted to float by - the prologue (in the latter case the type of the LOC_ARG - symbol is double and the type of the LOC_LOCAL symbol is - float). */ - /* But if the parameter name is null, don't try it. - Null parameter names occur on the RS/6000, for traceback tables. - FIXME, should we even print them? */ - - if (*SYMBOL_NAME (sym)) - { - struct symbol *nsym; - nsym = lookup_symbol - (SYMBOL_NAME (sym), - b, VAR_NAMESPACE, (int *) NULL, (struct symtab **) NULL); - if (SYMBOL_CLASS (nsym) == LOC_REGISTER) - { - /* There is a LOC_ARG/LOC_REGISTER pair. This means that - it was passed on the stack and loaded into a register, - or passed in a register and stored in a stack slot. - GDB 3.x used the LOC_ARG; GDB 4.0-4.11 used the LOC_REGISTER. - - Reasons for using the LOC_ARG: - (1) because find_saved_registers may be slow for remote - debugging, - (2) because registers are often re-used and stack slots - rarely (never?) are. Therefore using the stack slot is - much less likely to print garbage. - - Reasons why we might want to use the LOC_REGISTER: - (1) So that the backtrace prints the same value as - "print foo". I see no compelling reason why this needs - to be the case; having the backtrace print the value which - was passed in, and "print foo" print the value as modified - within the called function, makes perfect sense to me. - - Additional note: It might be nice if "info args" displayed - both values. - One more note: There is a case with sparc structure passing - where we need to use the LOC_REGISTER, but this is dealt with - by creating a single LOC_REGPARM in symbol reading. */ - - /* Leave sym (the LOC_ARG) alone. */ - ; - } - else - sym = nsym; - } - - /* Print the current arg. */ - if (!first) - ui_out_text (uiout, ", "); - ui_out_wrap_hint (uiout, " "); - - annotate_arg_begin (); - - list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); - fprintf_symbol_filtered (stb->stream, SYMBOL_SOURCE_NAME (sym), - SYMBOL_LANGUAGE (sym), DMGL_PARAMS | DMGL_ANSI); - ui_out_field_stream (uiout, "name", stb); - annotate_arg_name_end (); - ui_out_text (uiout, "="); - - /* Avoid value_print because it will deref ref parameters. We just - want to print their addresses. Print ??? for args whose address - we do not know. We pass 2 as "recurse" to val_print because our - standard indentation here is 4 spaces, and val_print indents - 2 for each recurse. */ - val = read_var_value (sym, fi); - - annotate_arg_value (val == NULL ? NULL : VALUE_TYPE (val)); - - if (val) - { - val_print (VALUE_TYPE (val), VALUE_CONTENTS (val), 0, - VALUE_ADDRESS (val), - stb->stream, 0, 0, 2, Val_no_prettyprint); - ui_out_field_stream (uiout, "value", stb); - } - else - ui_out_text (uiout, "???"); - - /* Invoke ui_out_tuple_end. */ - do_cleanups (list_chain); - - annotate_arg_end (); - - first = 0; - } - } - - /* Don't print nameless args in situations where we don't know - enough about the stack to find them. */ - if (num != -1) - { - long start; - - if (highest_offset == -1) - start = FRAME_ARGS_SKIP; - else - start = highest_offset; - - print_frame_nameless_args (fi, start, num - args_printed, - first, stream); - } - do_cleanups (old_chain); -} - -/* Print nameless args on STREAM. - FI is the frameinfo for this frame, START is the offset - of the first nameless arg, and NUM is the number of nameless args to - print. FIRST is nonzero if this is the first argument (not just - the first nameless arg). */ - -static void -print_frame_nameless_args (struct frame_info *fi, long start, int num, - int first, struct ui_file *stream) -{ - int i; - CORE_ADDR argsaddr; - long arg_value; - - for (i = 0; i < num; i++) - { - QUIT; -#ifdef NAMELESS_ARG_VALUE - NAMELESS_ARG_VALUE (fi, start, &arg_value); -#else - argsaddr = FRAME_ARGS_ADDRESS (fi); - if (!argsaddr) - return; - - arg_value = read_memory_integer (argsaddr + start, sizeof (int)); -#endif - - if (!first) - fprintf_filtered (stream, ", "); - -#ifdef PRINT_NAMELESS_INTEGER - PRINT_NAMELESS_INTEGER (stream, arg_value); -#else -#ifdef PRINT_TYPELESS_INTEGER - PRINT_TYPELESS_INTEGER (stream, builtin_type_int, (LONGEST) arg_value); -#else - fprintf_filtered (stream, "%ld", arg_value); -#endif /* PRINT_TYPELESS_INTEGER */ -#endif /* PRINT_NAMELESS_INTEGER */ - first = 0; - start += sizeof (int); - } -} - -/* ARGSUSED */ -static void -printf_command (char *arg, int from_tty) -{ - register char *f = NULL; - register char *s = arg; - char *string = NULL; - struct value **val_args; - char *substrings; - char *current_substring; - int nargs = 0; - int allocated_args = 20; - struct cleanup *old_cleanups; - - val_args = (struct value **) xmalloc (allocated_args - * sizeof (struct value *)); - old_cleanups = make_cleanup (free_current_contents, &val_args); - - if (s == 0) - error_no_arg ("format-control string and values to print"); - - /* Skip white space before format string */ - while (*s == ' ' || *s == '\t') - s++; - - /* A format string should follow, enveloped in double quotes */ - if (*s++ != '"') - error ("Bad format string, missing '\"'."); - - /* Parse the format-control string and copy it into the string STRING, - processing some kinds of escape sequence. */ - - f = string = (char *) alloca (strlen (s) + 1); - - while (*s != '"') - { - int c = *s++; - switch (c) - { - case '\0': - error ("Bad format string, non-terminated '\"'."); - - case '\\': - switch (c = *s++) - { - case '\\': - *f++ = '\\'; - break; - case 'a': - *f++ = '\a'; - break; - case 'b': - *f++ = '\b'; - break; - case 'f': - *f++ = '\f'; - break; - case 'n': - *f++ = '\n'; - break; - case 'r': - *f++ = '\r'; - break; - case 't': - *f++ = '\t'; - break; - case 'v': - *f++ = '\v'; - break; - case '"': - *f++ = '"'; - break; - default: - /* ??? TODO: handle other escape sequences */ - error ("Unrecognized escape character \\%c in format string.", - c); - } - break; - - default: - *f++ = c; - } - } - - /* Skip over " and following space and comma. */ - s++; - *f++ = '\0'; - while (*s == ' ' || *s == '\t') - s++; - - if (*s != ',' && *s != 0) - error ("Invalid argument syntax"); - - if (*s == ',') - s++; - while (*s == ' ' || *s == '\t') - s++; - - /* Need extra space for the '\0's. Doubling the size is sufficient. */ - substrings = alloca (strlen (string) * 2); - current_substring = substrings; - - { - /* Now scan the string for %-specs and see what kinds of args they want. - argclass[I] classifies the %-specs so we can give printf_filtered - something of the right size. */ - - enum argclass - { - no_arg, int_arg, string_arg, double_arg, long_long_arg - }; - enum argclass *argclass; - enum argclass this_argclass; - char *last_arg; - int nargs_wanted; - int lcount; - int i; - - argclass = (enum argclass *) alloca (strlen (s) * sizeof *argclass); - nargs_wanted = 0; - f = string; - last_arg = string; - while (*f) - if (*f++ == '%') - { - lcount = 0; - while (strchr ("0123456789.hlL-+ #", *f)) - { - if (*f == 'l' || *f == 'L') - lcount++; - f++; - } - switch (*f) - { - case 's': - this_argclass = string_arg; - break; - - case 'e': - case 'f': - case 'g': - this_argclass = double_arg; - break; - - case '*': - error ("`*' not supported for precision or width in printf"); - - case 'n': - error ("Format specifier `n' not supported in printf"); - - case '%': - this_argclass = no_arg; - break; - - default: - if (lcount > 1) - this_argclass = long_long_arg; - else - this_argclass = int_arg; - break; - } - f++; - if (this_argclass != no_arg) - { - strncpy (current_substring, last_arg, f - last_arg); - current_substring += f - last_arg; - *current_substring++ = '\0'; - last_arg = f; - argclass[nargs_wanted++] = this_argclass; - } - } - - /* Now, parse all arguments and evaluate them. - Store the VALUEs in VAL_ARGS. */ - - while (*s != '\0') - { - char *s1; - if (nargs == allocated_args) - val_args = (struct value **) xrealloc ((char *) val_args, - (allocated_args *= 2) - * sizeof (struct value *)); - s1 = s; - val_args[nargs] = parse_to_comma_and_eval (&s1); - - /* If format string wants a float, unchecked-convert the value to - floating point of the same size */ - - if (argclass[nargs] == double_arg) - { - struct type *type = VALUE_TYPE (val_args[nargs]); - if (TYPE_LENGTH (type) == sizeof (float)) - VALUE_TYPE (val_args[nargs]) = builtin_type_float; - if (TYPE_LENGTH (type) == sizeof (double)) - VALUE_TYPE (val_args[nargs]) = builtin_type_double; - } - nargs++; - s = s1; - if (*s == ',') - s++; - } - - if (nargs != nargs_wanted) - error ("Wrong number of arguments for specified format-string"); - - /* Now actually print them. */ - current_substring = substrings; - for (i = 0; i < nargs; i++) - { - switch (argclass[i]) - { - case string_arg: - { - char *str; - CORE_ADDR tem; - int j; - tem = value_as_address (val_args[i]); - - /* This is a %s argument. Find the length of the string. */ - for (j = 0;; j++) - { - char c; - QUIT; - read_memory (tem + j, &c, 1); - if (c == 0) - break; - } - - /* Copy the string contents into a string inside GDB. */ - str = (char *) alloca (j + 1); - if (j != 0) - read_memory (tem, str, j); - str[j] = 0; - - printf_filtered (current_substring, str); - } - break; - case double_arg: - { - double val = value_as_double (val_args[i]); - printf_filtered (current_substring, val); - break; - } - case long_long_arg: -#if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG) - { - long long val = value_as_long (val_args[i]); - printf_filtered (current_substring, val); - break; - } -#else - error ("long long not supported in printf"); -#endif - case int_arg: - { - /* FIXME: there should be separate int_arg and long_arg. */ - long val = value_as_long (val_args[i]); - printf_filtered (current_substring, val); - break; - } - default: /* purecov: deadcode */ - error ("internal error in printf_command"); /* purecov: deadcode */ - } - /* Skip to the next substring. */ - current_substring += strlen (current_substring) + 1; - } - /* Print the portion of the format string after the last argument. */ - printf_filtered (last_arg); - } - do_cleanups (old_cleanups); -} - -/* Dump a specified section of assembly code. With no command line - arguments, this command will dump the assembly code for the - function surrounding the pc value in the selected frame. With one - argument, it will dump the assembly code surrounding that pc value. - Two arguments are interpeted as bounds within which to dump - assembly. */ - -/* ARGSUSED */ -static void -disassemble_command (char *arg, int from_tty) -{ - CORE_ADDR low, high; - char *name; - CORE_ADDR pc, pc_masked; - char *space_index; -#if 0 - asection *section; -#endif - - name = NULL; - if (!arg) - { - if (!selected_frame) - error ("No frame selected.\n"); - - pc = get_frame_pc (selected_frame); - if (find_pc_partial_function (pc, &name, &low, &high) == 0) - error ("No function contains program counter for selected frame.\n"); -#if defined(TUI) - else if (tui_version) - low = tuiGetLowDisassemblyAddress (low, pc); -#endif - low += FUNCTION_START_OFFSET; - } - else if (!(space_index = (char *) strchr (arg, ' '))) - { - /* One argument. */ - pc = parse_and_eval_address (arg); - if (find_pc_partial_function (pc, &name, &low, &high) == 0) - error ("No function contains specified address.\n"); -#if defined(TUI) - else if (tui_version) - low = tuiGetLowDisassemblyAddress (low, pc); -#endif - low += FUNCTION_START_OFFSET; - } - else - { - /* Two arguments. */ - *space_index = '\0'; - low = parse_and_eval_address (arg); - high = parse_and_eval_address (space_index + 1); - } - -#if defined(TUI) - if (!tui_is_window_visible (DISASSEM_WIN)) -#endif - { - printf_filtered ("Dump of assembler code "); - if (name != NULL) - { - printf_filtered ("for function %s:\n", name); - } - else - { - printf_filtered ("from "); - print_address_numeric (low, 1, gdb_stdout); - printf_filtered (" to "); - print_address_numeric (high, 1, gdb_stdout); - printf_filtered (":\n"); - } - - /* Dump the specified range. */ - pc = low; - -#ifdef GDB_TARGET_MASK_DISAS_PC - pc_masked = GDB_TARGET_MASK_DISAS_PC (pc); -#else - pc_masked = pc; -#endif - - while (pc_masked < high) - { - QUIT; - print_address (pc_masked, gdb_stdout); - printf_filtered (":\t"); - /* We often wrap here if there are long symbolic names. */ - wrap_here (" "); - pc += print_insn (pc, gdb_stdout); - printf_filtered ("\n"); - -#ifdef GDB_TARGET_MASK_DISAS_PC - pc_masked = GDB_TARGET_MASK_DISAS_PC (pc); -#else - pc_masked = pc; -#endif - } - printf_filtered ("End of assembler dump.\n"); - gdb_flush (gdb_stdout); - } -#if defined(TUI) - else - { - tui_show_assembly (low); - } -#endif -} - -/* Print the instruction at address MEMADDR in debugged memory, - on STREAM. Returns length of the instruction, in bytes. */ - -static int -print_insn (CORE_ADDR memaddr, struct ui_file *stream) -{ - if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) - TARGET_PRINT_INSN_INFO->endian = BFD_ENDIAN_BIG; - else - TARGET_PRINT_INSN_INFO->endian = BFD_ENDIAN_LITTLE; - - if (TARGET_ARCHITECTURE != NULL) - TARGET_PRINT_INSN_INFO->mach = TARGET_ARCHITECTURE->mach; - /* else: should set .mach=0 but some disassemblers don't grok this */ - - TARGET_PRINT_INSN_INFO->stream = stream; - - return TARGET_PRINT_INSN (memaddr, TARGET_PRINT_INSN_INFO); -} - - -void -_initialize_printcmd (void) -{ - struct cmd_list_element *c; - - current_display_number = -1; - - add_info ("address", address_info, - "Describe where symbol SYM is stored."); - - add_info ("symbol", sym_info, - "Describe what symbol is at location ADDR.\n\ -Only for symbols with fixed locations (global or static scope)."); - - add_com ("x", class_vars, x_command, - concat ("Examine memory: x/FMT ADDRESS.\n\ -ADDRESS is an expression for the memory address to examine.\n\ -FMT is a repeat count followed by a format letter and a size letter.\n\ -Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\ - t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n", - "Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\ -The specified number of objects of the specified size are printed\n\ -according to the format.\n\n\ -Defaults for format and size letters are those previously used.\n\ -Default count is 1. Default address is following last thing printed\n\ -with this command or \"print\".", NULL)); - - c = add_com ("disassemble", class_vars, disassemble_command, - "Disassemble a specified section of memory.\n\ -Default is the function surrounding the pc of the selected frame.\n\ -With a single argument, the function surrounding that address is dumped.\n\ -Two arguments are taken as a range of memory to dump."); - set_cmd_completer (c, location_completer); - if (xdb_commands) - add_com_alias ("va", "disassemble", class_xdb, 0); - -#if 0 - add_com ("whereis", class_vars, whereis_command, - "Print line number and file of definition of variable."); -#endif - - add_info ("display", display_info, - "Expressions to display when program stops, with code numbers."); - - add_cmd ("undisplay", class_vars, undisplay_command, - "Cancel some expressions to be displayed when program stops.\n\ -Arguments are the code numbers of the expressions to stop displaying.\n\ -No argument means cancel all automatic-display expressions.\n\ -\"delete display\" has the same effect as this command.\n\ -Do \"info display\" to see current list of code numbers.", - &cmdlist); - - add_com ("display", class_vars, display_command, - "Print value of expression EXP each time the program stops.\n\ -/FMT may be used before EXP as in the \"print\" command.\n\ -/FMT \"i\" or \"s\" or including a size-letter is allowed,\n\ -as in the \"x\" command, and then EXP is used to get the address to examine\n\ -and examining is done as in the \"x\" command.\n\n\ -With no argument, display all currently requested auto-display expressions.\n\ -Use \"undisplay\" to cancel display requests previously made." - ); - - add_cmd ("display", class_vars, enable_display, - "Enable some expressions to be displayed when program stops.\n\ -Arguments are the code numbers of the expressions to resume displaying.\n\ -No argument means enable all automatic-display expressions.\n\ -Do \"info display\" to see current list of code numbers.", &enablelist); - - add_cmd ("display", class_vars, disable_display_command, - "Disable some expressions to be displayed when program stops.\n\ -Arguments are the code numbers of the expressions to stop displaying.\n\ -No argument means disable all automatic-display expressions.\n\ -Do \"info display\" to see current list of code numbers.", &disablelist); - - add_cmd ("display", class_vars, undisplay_command, - "Cancel some expressions to be displayed when program stops.\n\ -Arguments are the code numbers of the expressions to stop displaying.\n\ -No argument means cancel all automatic-display expressions.\n\ -Do \"info display\" to see current list of code numbers.", &deletelist); - - add_com ("printf", class_vars, printf_command, - "printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\ -This is useful for formatted output in user-defined commands."); - - add_com ("output", class_vars, output_command, - "Like \"print\" but don't put in value history and don't print newline.\n\ -This is useful in user-defined commands."); - - add_prefix_cmd ("set", class_vars, set_command, - concat ("Evaluate expression EXP and assign result to variable VAR, using assignment\n\ -syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ -example). VAR may be a debugger \"convenience\" variable (names starting\n\ -with $), a register (a few standard names starting with $), or an actual\n\ -variable in the program being debugged. EXP is any valid expression.\n", - "Use \"set variable\" for variables with names identical to set subcommands.\n\ -\nWith a subcommand, this command modifies parts of the gdb environment.\n\ -You can see these environment settings with the \"show\" command.", NULL), - &setlist, "set ", 1, &cmdlist); - if (dbx_commands) - add_com ("assign", class_vars, set_command, concat ("Evaluate expression \ -EXP and assign result to variable VAR, using assignment\n\ -syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ -example). VAR may be a debugger \"convenience\" variable (names starting\n\ -with $), a register (a few standard names starting with $), or an actual\n\ -variable in the program being debugged. EXP is any valid expression.\n", - "Use \"set variable\" for variables with names identical to set subcommands.\n\ -\nWith a subcommand, this command modifies parts of the gdb environment.\n\ -You can see these environment settings with the \"show\" command.", NULL)); - - /* "call" is the same as "set", but handy for dbx users to call fns. */ - c = add_com ("call", class_vars, call_command, - "Call a function in the program.\n\ -The argument is the function name and arguments, in the notation of the\n\ -current working language. The result is printed and saved in the value\n\ -history, if it is not void."); - set_cmd_completer (c, location_completer); - - add_cmd ("variable", class_vars, set_command, - "Evaluate expression EXP and assign result to variable VAR, using assignment\n\ -syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ -example). VAR may be a debugger \"convenience\" variable (names starting\n\ -with $), a register (a few standard names starting with $), or an actual\n\ -variable in the program being debugged. EXP is any valid expression.\n\ -This may usually be abbreviated to simply \"set\".", - &setlist); - - c = add_com ("print", class_vars, print_command, - concat ("Print value of expression EXP.\n\ -Variables accessible are those of the lexical environment of the selected\n\ -stack frame, plus all those whose scope is global or an entire file.\n\ -\n\ -$NUM gets previous value number NUM. $ and $$ are the last two values.\n\ -$$NUM refers to NUM'th value back from the last one.\n\ -Names starting with $ refer to registers (with the values they would have\n", - "if the program were to return to the stack frame now selected, restoring\n\ -all registers saved by frames farther in) or else to debugger\n\ -\"convenience\" variables (any such name not a known register).\n\ -Use assignment expressions to give values to convenience variables.\n", - "\n\ -{TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\ -@ is a binary operator for treating consecutive data objects\n\ -anywhere in memory as an array. FOO@NUM gives an array whose first\n\ -element is FOO, whose second element is stored in the space following\n\ -where FOO is stored, etc. FOO must be an expression whose value\n\ -resides in memory.\n", - "\n\ -EXP may be preceded with /FMT, where FMT is a format letter\n\ -but no count or size letter (see \"x\" command).", NULL)); - set_cmd_completer (c, location_completer); - add_com_alias ("p", "print", class_vars, 1); - - c = add_com ("inspect", class_vars, inspect_command, - "Same as \"print\" command, except that if you are running in the epoch\n\ -environment, the value is printed in its own window."); - set_cmd_completer (c, location_completer); - - add_show_from_set ( - add_set_cmd ("max-symbolic-offset", no_class, var_uinteger, - (char *) &max_symbolic_offset, - "Set the largest offset that will be printed in <symbol+1234> form.", - &setprintlist), - &showprintlist); - add_show_from_set ( - add_set_cmd ("symbol-filename", no_class, var_boolean, - (char *) &print_symbol_filename, - "Set printing of source filename and line number with <symbol>.", - &setprintlist), - &showprintlist); - - /* For examine/instruction a single byte quantity is specified as - the data. This avoids problems with value_at_lazy() requiring a - valid data type (and rejecting VOID). */ - examine_i_type = init_type (TYPE_CODE_INT, 1, 0, "examine_i_type", NULL); - - examine_b_type = init_type (TYPE_CODE_INT, 1, 0, "examine_b_type", NULL); - examine_h_type = init_type (TYPE_CODE_INT, 2, 0, "examine_h_type", NULL); - examine_w_type = init_type (TYPE_CODE_INT, 4, 0, "examine_w_type", NULL); - examine_g_type = init_type (TYPE_CODE_INT, 8, 0, "examine_g_type", NULL); - -} |