X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fstack.c;h=d37294dba1d0d0ccd06ce35c130e96fd36965f93;hb=60250e8b18a4dee75e82d49da715681d41561b3b;hp=4f41531189a80210ed073ed23f99368cfaeb2533;hpb=0378c3323148fbb291d1035d9959de9d9c3a0f7b;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/stack.c b/gdb/stack.c index 4f41531189..d37294dba1 100644 --- a/gdb/stack.c +++ b/gdb/stack.c @@ -1,8 +1,8 @@ /* Print and select stack frames for GDB, the GNU debugger. Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, - 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software - Foundation, Inc. + 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free + Software Foundation, Inc. This file is part of GDB. @@ -39,6 +39,13 @@ #include "inferior.h" #include "annotate.h" #include "ui-out.h" +#include "block.h" +#include "stack.h" +#include "gdb_assert.h" +#include "dictionary.h" +#include "exceptions.h" +#include "reggroups.h" +#include "regcache.h" /* Prototypes for exported functions. */ @@ -46,14 +53,12 @@ void args_info (char *, int); void locals_info (char *, int); -void (*selected_frame_level_changed_hook) (int); +void (*deprecated_selected_frame_level_changed_hook) (int); void _initialize_stack (void); /* Prototypes for local functions. */ -static void return_command (char *, int); - static void down_command (char *, int); static void down_silently_base (char *); @@ -70,8 +75,6 @@ void frame_command (char *, int); static void current_frame_command (char *, int); -static void select_frame_command (char *, int); - static void print_frame_arg_vars (struct frame_info *, struct ui_file *); static void catch_info (char *, int); @@ -93,44 +96,19 @@ static int print_block_frame_locals (struct block *, struct ui_file *); static void print_frame (struct frame_info *fi, - int level, - int source, - int args, + int print_level, + enum print_what print_what, + int print_args, struct symtab_and_line sal); -static void print_frame_info_base (struct frame_info *, int, int, int); - -static void print_stack_frame_base (struct frame_info *, int, int); +static void set_current_sal_from_frame (struct frame_info *, int); static void backtrace_command (char *, int); -struct frame_info *parse_frame_specification (char *); - static void frame_info (char *, int); extern int addressprint; /* Print addresses, or stay symbolic only? */ -/* The "selected" stack frame is used by default for local and arg access. - May be zero, for no selected frame. */ - -struct frame_info *selected_frame; - -/* Level of the selected frame: - 0 for innermost, 1 for its caller, ... - or -1 for frame specified by address with no defined level. */ - -/* Level of the selected frame: 0 for innermost, 1 for its caller, ... - or -1 for NULL frame. */ - -int -frame_relative_level (struct frame_info *fi) -{ - if (fi == NULL) - return -1; - else - return fi->level; -} - /* Zero means do things normally; we are interacting directly with the user. One means print the full filename and linenumber when a frame is printed, and do so in a format emacs18/emacs19.22 can @@ -143,179 +121,310 @@ int annotation_level = 0; struct print_stack_frame_args { struct frame_info *fi; - int level; - int source; - int args; + int print_level; + enum print_what print_what; + int print_args; }; -static int print_stack_frame_base_stub (char *); - -/* Show and print the frame arguments. +/* Show or print the frame arguments. Pass the args the way catch_errors wants them. */ -static int show_and_print_stack_frame_stub (void *args); static int -show_and_print_stack_frame_stub (void *args) +print_stack_frame_stub (void *args) { - struct print_stack_frame_args *p = (struct print_stack_frame_args *) args; - - print_frame_info (p->fi, p->level, p->source, p->args); + struct print_stack_frame_args *p = args; + int center = (p->print_what == SRC_LINE + || p->print_what == SRC_AND_LOC); + print_frame_info (p->fi, p->print_level, p->print_what, p->print_args); + set_current_sal_from_frame (p->fi, center); return 0; } -/* Show or print the frame arguments. - Pass the args the way catch_errors wants them. */ -static int print_stack_frame_stub (void *args); -static int -print_stack_frame_stub (void *args) +/* Show or print a stack frame FI briefly. The output is format + according to PRINT_LEVEL and PRINT_WHAT printing the frame's + relative level, function name, argument list, and file name and + line number. If the frame's PC is not at the beginning of the + source line, the actual PC is printed at the beginning. */ + +void +print_stack_frame (struct frame_info *fi, int print_level, + enum print_what print_what) { - struct print_stack_frame_args *p = (struct print_stack_frame_args *) args; + struct print_stack_frame_args args; - print_frame_info_base (p->fi, p->level, p->source, p->args); - return 0; -} + args.fi = fi; + args.print_level = print_level; + args.print_what = print_what; + args.print_args = 1; -/* Print a stack frame briefly. FRAME_INFI should be the frame info - and LEVEL should be its level in the stack (or -1 for level not - defined). */ + catch_errors (print_stack_frame_stub, (char *) &args, "", RETURN_MASK_ALL); +} -/* Pass the args the way catch_errors wants them. */ -static int -print_stack_frame_base_stub (char *args) +struct print_args_args { - struct print_stack_frame_args *p = (struct print_stack_frame_args *) args; + struct symbol *func; + struct frame_info *fi; + struct ui_file *stream; +}; - print_frame_info_base (p->fi, p->level, p->source, p->args); - return 0; -} +static int print_args_stub (void *); -/* print the frame arguments to the terminal. - Pass the args the way catch_errors wants them. */ -static int print_only_stack_frame_stub (void *); -static int -print_only_stack_frame_stub (void *args) +/* 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) { - struct print_stack_frame_args *p = (struct print_stack_frame_args *) args; + int i; + CORE_ADDR argsaddr; + long arg_value; - print_frame_info_base (p->fi, p->level, p->source, p->args); - return 0; + for (i = 0; i < num; i++) + { + QUIT; + argsaddr = get_frame_args_address (fi); + if (!argsaddr) + return; + arg_value = read_memory_integer (argsaddr + start, sizeof (int)); + if (!first) + fprintf_filtered (stream, ", "); + fprintf_filtered (stream, "%ld", arg_value); + first = 0; + start += sizeof (int); + } } -/* Print a stack frame briefly. FRAME_INFI should be the frame info - and LEVEL should be its level in the stack (or -1 for level not defined). - This prints the level, the function executing, the arguments, - and the file name and line number. - If the pc is not at the beginning of the source line, - the actual pc is printed at the beginning. +/* 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). */ - If SOURCE is 1, print the source line as well. - If SOURCE is -1, print ONLY the source line. */ +/* 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. */ static void -print_stack_frame_base (struct frame_info *fi, int level, int source) +print_frame_args (struct symbol *func, struct frame_info *fi, int num, + struct ui_file *stream) { - struct print_stack_frame_args args; - - args.fi = fi; - args.level = level; - args.source = source; - args.args = 1; + struct block *b = NULL; + int first = 1; + struct dict_iterator iter; + 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; - catch_errors (print_stack_frame_stub, &args, "", RETURN_MASK_ALL); -} + stb = ui_out_stream_new (uiout); + old_chain = make_cleanup_ui_out_stream_delete (stb); -/* Show and print a stack frame briefly. FRAME_INFI should be the frame info - and LEVEL should be its level in the stack (or -1 for level not defined). - This prints the level, the function executing, the arguments, - and the file name and line number. - If the pc is not at the beginning of the source line, - the actual pc is printed at the beginning. + if (func) + { + b = SYMBOL_BLOCK_VALUE (func); - If SOURCE is 1, print the source line as well. - If SOURCE is -1, print ONLY the source line. */ + ALL_BLOCK_SYMBOLS (b, iter, sym) + { + QUIT; -void -show_and_print_stack_frame (struct frame_info *fi, int level, int source) -{ - struct print_stack_frame_args args; + /* Keep track of the highest stack argument offset seen, and + skip over any kinds of symbols we don't care about. */ - args.fi = fi; - args.level = level; - args.source = source; - args.args = 1; + 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: + case LOC_COMPUTED_ARG: + break; + + /* Other types of symbols we just skip over. */ + default: + continue; + } - catch_errors (show_and_print_stack_frame_stub, &args, "", RETURN_MASK_ALL); -} + /* 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 (*DEPRECATED_SYMBOL_NAME (sym)) + { + struct symbol *nsym; + nsym = lookup_symbol + (DEPRECATED_SYMBOL_NAME (sym), + b, VAR_DOMAIN, (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; + } -/* Show or print a stack frame briefly. FRAME_INFI should be the frame info - and LEVEL should be its level in the stack (or -1 for level not defined). - This prints the level, the function executing, the arguments, - and the file name and line number. - If the pc is not at the beginning of the source line, - the actual pc is printed at the beginning. + /* Print the current arg. */ + if (!first) + ui_out_text (uiout, ", "); + ui_out_wrap_hint (uiout, " "); - If SOURCE is 1, print the source line as well. - If SOURCE is -1, print ONLY the source line. */ + annotate_arg_begin (); -void -print_stack_frame (struct frame_info *fi, int level, int source) -{ - struct print_stack_frame_args args; + list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); + fprintf_symbol_filtered (stb->stream, SYMBOL_PRINT_NAME (sym), + SYMBOL_LANGUAGE (sym), DMGL_PARAMS | DMGL_ANSI); + ui_out_field_stream (uiout, "name", stb); + annotate_arg_name_end (); + ui_out_text (uiout, "="); - args.fi = fi; - args.level = level; - args.source = source; - args.args = 1; + /* 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); - catch_errors (print_stack_frame_stub, (char *) &args, "", RETURN_MASK_ALL); -} + annotate_arg_value (val == NULL ? NULL : value_type (val)); -/* Print a stack frame briefly. FRAME_INFI should be the frame info - and LEVEL should be its level in the stack (or -1 for level not defined). - This prints the level, the function executing, the arguments, - and the file name and line number. - If the pc is not at the beginning of the source line, - the actual pc is printed at the beginning. + 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, "???"); - If SOURCE is 1, print the source line as well. - If SOURCE is -1, print ONLY the source line. */ + /* Invoke ui_out_tuple_end. */ + do_cleanups (list_chain); -void -print_only_stack_frame (struct frame_info *fi, int level, int source) -{ - struct print_stack_frame_args args; + annotate_arg_end (); - args.fi = fi; - args.level = level; - args.source = source; - args.args = 1; + first = 0; + } + } - catch_errors (print_only_stack_frame_stub, &args, "", RETURN_MASK_ALL); -} + /* Don't print nameless args in situations where we don't know + enough about the stack to find them. */ + if (num != -1) + { + long start; -struct print_args_args -{ - struct symbol *func; - struct frame_info *fi; - struct ui_file *stream; -}; + if (highest_offset == -1) + start = FRAME_ARGS_SKIP; + else + start = highest_offset; -static int print_args_stub (PTR); + print_frame_nameless_args (fi, start, num - args_printed, + first, stream); + } + do_cleanups (old_chain); +} /* Pass the args the way catch_errors wants them. */ static int -print_args_stub (PTR args) +print_args_stub (void *args) { int numargs; struct print_args_args *p = (struct print_args_args *) args; - numargs = FRAME_NUM_ARGS (p->fi); + if (FRAME_NUM_ARGS_P ()) + { + numargs = FRAME_NUM_ARGS (p->fi); + gdb_assert (numargs >= 0); + } + else + numargs = -1; print_frame_args (p->func, p->fi, numargs, p->stream); return 0; } +/* Set the current source and line to the location of the given + frame, if possible. When CENTER is true, adjust so the + relevant line is in the center of the next 'list'. */ + +static void +set_current_sal_from_frame (struct frame_info *fi, int center) +{ + struct symtab_and_line sal; + + find_frame_sal (fi, &sal); + if (sal.symtab) + { + if (center) + sal.line = max (sal.line - get_lines_to_list () / 2, 1); + set_current_source_symtab_and_line (&sal); + } +} + /* Print information about a frame for frame "fi" at level "level". Used in "where" output, also used to emit breakpoint or step messages. @@ -326,95 +435,85 @@ print_args_stub (PTR args) LOCATION: Print only location LOC_AND_SRC: Print location and source line. */ -static void -print_frame_info_base (struct frame_info *fi, int level, int source, int args) +void +print_frame_info (struct frame_info *fi, int print_level, + enum print_what print_what, int print_args) { struct symtab_and_line sal; int source_print; int location_print; -#if 0 - char buf[MAX_REGISTER_RAW_SIZE]; - CORE_ADDR sp; - - /* On the 68k, this spends too much time in m68k_find_saved_regs. */ - - /* Get the value of SP_REGNUM relative to the frame. */ - get_saved_register (buf, (int *) NULL, (CORE_ADDR *) NULL, - FRAME_INFO_ID (fi), SP_REGNUM, (enum lval_type *) NULL); - sp = extract_address (buf, REGISTER_RAW_SIZE (SP_REGNUM)); - - /* This is not a perfect test, because if a function alloca's some - memory, puts some code there, and then jumps into it, then the test - will succeed even though there is no call dummy. Probably best is - to check for a bp_call_dummy breakpoint. */ - if (PC_IN_CALL_DUMMY (fi->pc, sp, fi->frame)) -#else - if (frame_in_dummy (fi)) -#endif + if (get_frame_type (fi) == DUMMY_FRAME + || get_frame_type (fi) == SIGTRAMP_FRAME) { - annotate_frame_begin (level == -1 ? 0 : level, fi->pc); + struct cleanup *uiout_cleanup + = make_cleanup_ui_out_tuple_begin_end (uiout, "frame"); - /* Do this regardless of SOURCE because we don't have any source - to list for this frame. */ - if (level >= 0) - printf_filtered ("#%-2d ", level); - annotate_function_call (); - printf_filtered ("\n"); - annotate_frame_end (); - return; - } - if (fi->signal_handler_caller) - { - annotate_frame_begin (level == -1 ? 0 : level, fi->pc); + annotate_frame_begin (print_level ? frame_relative_level (fi) : 0, + get_frame_pc (fi)); /* Do this regardless of SOURCE because we don't have any source to list for this frame. */ - if (level >= 0) - printf_filtered ("#%-2d ", level); - annotate_signal_handler_caller (); - printf_filtered ("\n"); + if (print_level) + { + ui_out_text (uiout, "#"); + ui_out_field_fmt_int (uiout, 2, ui_left, "level", + frame_relative_level (fi)); + } + if (ui_out_is_mi_like_p (uiout)) + { + annotate_frame_address (); + ui_out_field_core_addr (uiout, "addr", get_frame_pc (fi)); + annotate_frame_address_end (); + } + + if (get_frame_type (fi) == DUMMY_FRAME) + { + annotate_function_call (); + ui_out_field_string (uiout, "func", ""); + } + else if (get_frame_type (fi) == SIGTRAMP_FRAME) + { + annotate_signal_handler_caller (); + ui_out_field_string (uiout, "func", ""); + } + ui_out_text (uiout, "\n"); annotate_frame_end (); + + do_cleanups (uiout_cleanup); return; } /* If fi is not the innermost frame, that normally means that fi->pc - points to *after* the call instruction, and we want to get the line - containing the call, never the next line. But if the next frame is - a signal_handler_caller or a dummy frame, then the next frame was - not entered as the result of a call, and we want to get the line - containing fi->pc. */ - sal = - find_pc_line (fi->pc, - fi->next != NULL - && !fi->next->signal_handler_caller - && !frame_in_dummy (fi->next)); - - location_print = (source == LOCATION - || source == LOC_AND_ADDRESS - || source == SRC_AND_LOC); + points to *after* the call instruction, and we want to get the + line containing the call, never the next line. But if the next + frame is a SIGTRAMP_FRAME or a DUMMY_FRAME, then the next frame + was not entered as the result of a call, and we want to get the + line containing fi->pc. */ + find_frame_sal (fi, &sal); - if (location_print || !sal.symtab) - print_frame (fi, level, source, args, sal); + location_print = (print_what == LOCATION + || print_what == LOC_AND_ADDRESS + || print_what == SRC_AND_LOC); - source_print = (source == SRC_LINE || source == SRC_AND_LOC); + if (location_print || !sal.symtab) + print_frame (fi, print_level, print_what, print_args, sal); - if (sal.symtab) - set_current_source_symtab_and_line (&sal); + source_print = (print_what == SRC_LINE || print_what == SRC_AND_LOC); if (source_print && sal.symtab) { - struct symtab_and_line cursal; int done = 0; - int mid_statement = (source == SRC_LINE) && (fi->pc != sal.pc); + int mid_statement = ((print_what == SRC_LINE) + && (get_frame_pc (fi) != sal.pc)); if (annotation_level) done = identify_source_line (sal.symtab, sal.line, mid_statement, - fi->pc); + get_frame_pc (fi)); if (!done) { - if (print_frame_info_listing_hook) - print_frame_info_listing_hook (sal.symtab, sal.line, sal.line + 1, 0); + if (deprecated_print_frame_info_listing_hook) + deprecated_print_frame_info_listing_hook (sal.symtab, sal.line, sal.line + 1, 0); else { /* We used to do this earlier, but that is clearly @@ -427,20 +526,17 @@ print_frame_info_base (struct frame_info *fi, int level, int source, int args) ability to decide for themselves if it is desired. */ if (addressprint && mid_statement) { - ui_out_field_core_addr (uiout, "addr", fi->pc); + ui_out_field_core_addr (uiout, "addr", get_frame_pc (fi)); ui_out_text (uiout, "\t"); } print_source_lines (sal.symtab, sal.line, sal.line + 1, 0); } } - cursal = get_current_or_default_source_symtab_and_line (); - cursal.line = max (sal.line - get_lines_to_list () / 2, 1); - set_current_source_symtab_and_line (&cursal); } - if (source != 0) - set_default_breakpoint (1, fi->pc, sal.symtab, sal.line); + if (print_what != LOCATION) + set_default_breakpoint (1, get_frame_pc (fi), sal.symtab, sal.line); annotate_frame_end (); @@ -449,13 +545,13 @@ print_frame_info_base (struct frame_info *fi, int level, int source, int args) static void print_frame (struct frame_info *fi, - int level, - int source, - int args, + int print_level, + enum print_what print_what, + int print_args, struct symtab_and_line sal) { struct symbol *func; - register char *funname = 0; + char *funname = 0; enum language funlang = language_unknown; struct ui_stream *stb; struct cleanup *old_chain; @@ -464,7 +560,7 @@ print_frame (struct frame_info *fi, stb = ui_out_stream_new (uiout); old_chain = make_cleanup_ui_out_stream_delete (stb); - func = find_pc_function (frame_address_in_block (fi)); + func = find_pc_function (get_frame_address_in_block (fi)); if (func) { /* In certain pathological cases, the symtabs give the wrong @@ -483,28 +579,20 @@ print_frame (struct frame_info *fi, ever changed many parts of GDB will need to be changed (and we'll create a find_pc_minimal_function or some such). */ - struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (frame_address_in_block (fi)); + struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (get_frame_address_in_block (fi)); if (msymbol != NULL && (SYMBOL_VALUE_ADDRESS (msymbol) > BLOCK_START (SYMBOL_BLOCK_VALUE (func)))) { -#if 0 - /* There is no particular reason to think the line number - information is wrong. Someone might have just put in - a label with asm() but left the line numbers alone. */ - /* In this case we have no way of knowing the source file - and line number, so don't print them. */ - sal.symtab = 0; -#endif /* We also don't know anything about the function besides its address and name. */ func = 0; - funname = SYMBOL_NAME (msymbol); + funname = DEPRECATED_SYMBOL_NAME (msymbol); funlang = SYMBOL_LANGUAGE (msymbol); } else { - /* I'd like to use SYMBOL_SOURCE_NAME() here, to display the + /* I'd like to use SYMBOL_PRINT_NAME() here, to display the demangled name that we already have stored in the symbol table, but we stored a version with DMGL_PARAMS turned on, and here we don't want to display parameters. So call @@ -516,7 +604,7 @@ print_frame (struct frame_info *fi, here, while we still have our hands on the function symbol.) */ char *demangled; - funname = SYMBOL_NAME (func); + funname = DEPRECATED_SYMBOL_NAME (func); funlang = SYMBOL_LANGUAGE (func); if (funlang == language_cplus) { @@ -525,35 +613,38 @@ print_frame (struct frame_info *fi, /* If the demangler fails, try the demangled name from the symbol table. This'll have parameters, but that's preferable to diplaying a mangled name. */ - funname = SYMBOL_SOURCE_NAME (func); + funname = SYMBOL_PRINT_NAME (func); } } } else { - struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (frame_address_in_block (fi)); + struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (get_frame_address_in_block (fi)); if (msymbol != NULL) { - funname = SYMBOL_NAME (msymbol); + funname = DEPRECATED_SYMBOL_NAME (msymbol); funlang = SYMBOL_LANGUAGE (msymbol); } } - annotate_frame_begin (level == -1 ? 0 : level, fi->pc); + annotate_frame_begin (print_level ? frame_relative_level (fi) : 0, + get_frame_pc (fi)); list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "frame"); - if (level >= 0) + if (print_level) { ui_out_text (uiout, "#"); - ui_out_field_fmt (uiout, "level", "%-2d", level); - ui_out_spaces (uiout, 1); + ui_out_field_fmt_int (uiout, 2, ui_left, "level", + frame_relative_level (fi)); } if (addressprint) - if (fi->pc != sal.pc || !sal.symtab || source == LOC_AND_ADDRESS) + if (get_frame_pc (fi) != sal.pc + || !sal.symtab + || print_what == LOC_AND_ADDRESS) { annotate_frame_address (); - ui_out_field_core_addr (uiout, "addr", fi->pc); + ui_out_field_core_addr (uiout, "addr", get_frame_pc (fi)); annotate_frame_address_end (); ui_out_text (uiout, " in "); } @@ -565,7 +656,7 @@ print_frame (struct frame_info *fi, annotate_frame_args (); ui_out_text (uiout, " ("); - if (args) + if (print_args) { struct print_args_args args; struct cleanup *args_list_chain; @@ -598,7 +689,7 @@ print_frame (struct frame_info *fi, #ifdef PC_SOLIB if (!funname || (!sal.symtab || !sal.symtab->filename)) { - char *lib = PC_SOLIB (fi->pc); + char *lib = PC_SOLIB (get_frame_pc (fi)); if (lib) { annotate_frame_where (); @@ -615,16 +706,6 @@ print_frame (struct frame_info *fi, do_cleanups (old_chain); } - -/* Show or print the frame info. If this is the tui, it will be shown in - the source display */ -void -print_frame_info (struct frame_info *fi, register int level, int source, - int args) -{ - print_frame_info_base (fi, level, source, args); -} - /* Show the frame info. If this is the tui, it will be shown in the source display otherwise, nothing is done */ void @@ -634,133 +715,147 @@ show_stack_frame (struct frame_info *fi) /* Read a frame specification in whatever the appropriate format is. - Call error() if the specification is in any way invalid (i.e. - this function never returns NULL). */ + Call error() if the specification is in any way invalid (i.e. this + function never returns NULL). When SEPECTED_P is non-NULL set it's + target to indicate that the default selected frame was used. */ -struct frame_info * -parse_frame_specification (char *frame_exp) +static struct frame_info * +parse_frame_specification_1 (const char *frame_exp, const char *message, + int *selected_frame_p) { - int numargs = 0; -#define MAXARGS 4 - CORE_ADDR args[MAXARGS]; - int level; + int numargs; + struct value *args[4]; + CORE_ADDR addrs[ARRAY_SIZE (args)]; - if (frame_exp) + if (frame_exp == NULL) + numargs = 0; + else { - char *addr_string, *p; + char *addr_string; struct cleanup *tmp_cleanup; - while (*frame_exp == ' ') - frame_exp++; - - while (*frame_exp) + numargs = 0; + while (1) { - if (numargs > MAXARGS) - error ("Too many args in frame specification"); - /* Parse an argument. */ - for (p = frame_exp; *p && *p != ' '; p++) - ; - addr_string = savestring (frame_exp, p - frame_exp); - - { - struct value *vp; - - tmp_cleanup = make_cleanup (xfree, addr_string); - - /* NOTE: we call parse_and_eval and then both - value_as_long and value_as_address rather than calling - parse_and_eval_long and parse_and_eval_address because - of the issue of potential side effects from evaluating - the expression. */ - vp = parse_and_eval (addr_string); - if (numargs == 0) - level = value_as_long (vp); - - args[numargs++] = value_as_address (vp); - do_cleanups (tmp_cleanup); - } + char *addr_string; + struct cleanup *cleanup; + const char *p; + + /* Skip leading white space, bail of EOL. */ + while (isspace (*frame_exp)) + frame_exp++; + if (!*frame_exp) + break; - /* Skip spaces, move to possible next arg. */ - while (*p == ' ') - p++; + /* Parse the argument, extract it, save it. */ + for (p = frame_exp; + *p && !isspace (*p); + p++); + addr_string = savestring (frame_exp, p - frame_exp); frame_exp = p; + cleanup = make_cleanup (xfree, addr_string); + + /* NOTE: Parse and evaluate expression, but do not use + functions such as parse_and_eval_long or + parse_and_eval_address to also extract the value. + Instead value_as_long and value_as_address are used. + This avoids problems with expressions that contain + side-effects. */ + if (numargs >= ARRAY_SIZE (args)) + error ("Too many args in frame specification"); + args[numargs++] = parse_and_eval (addr_string); + + do_cleanups (cleanup); } } - switch (numargs) + /* If no args, default to the selected frame. */ + if (numargs == 0) { - case 0: - if (selected_frame == NULL) - error ("No selected frame."); - return selected_frame; - /* NOTREACHED */ - case 1: - { - struct frame_info *fid = - find_relative_frame (get_current_frame (), &level); - struct frame_info *tfid; - - if (level == 0) - /* find_relative_frame was successful */ - return fid; - - /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications - take at least 2 addresses. It is important to detect this case - here so that "frame 100" does not give a confusing error message - like "frame specification requires two addresses". This of course - does not solve the "frame 100" problem for machines on which - a frame specification can be made with one address. To solve - that, we need a new syntax for a specifying a frame by address. - I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for - two args, etc.), but people might think that is too much typing, - so I guess *0x23,0x45 would be a possible alternative (commas - really should be used instead of spaces to delimit; using spaces - normally works in an expression). */ -#ifdef SETUP_ARBITRARY_FRAME - error ("No frame %s", paddr_d (args[0])); -#endif - - /* If (s)he specifies the frame with an address, he deserves what - (s)he gets. Still, give the highest one that matches. */ + if (selected_frame_p != NULL) + (*selected_frame_p) = 1; + return get_selected_frame (message); + } - for (fid = get_current_frame (); - fid && fid->frame != args[0]; - fid = get_prev_frame (fid)) - ; + /* None of the remaining use the selected frame. */ + if (selected_frame_p != NULL) + (*selected_frame_p) = 0; - if (fid) - while ((tfid = get_prev_frame (fid)) && - (tfid->frame == args[0])) - fid = tfid; + /* Assume the single arg[0] is an integer, and try using that to + select a frame relative to current. */ + if (numargs == 1) + { + struct frame_info *fid; + int level = value_as_long (args[0]); + fid = find_relative_frame (get_current_frame (), &level); + if (level == 0) + /* find_relative_frame was successful */ + return fid; + } - /* We couldn't identify the frame as an existing frame, but - perhaps we can create one with a single argument. */ - } + /* Convert each value into a corresponding address. */ + { + int i; + for (i = 0; i < numargs; i++) + addrs[i] = value_as_address (args[0]); + } - default: + /* Assume that the single arg[0] is an address, use that to identify + a frame with a matching ID. Should this also accept stack/pc or + stack/pc/special. */ + if (numargs == 1) + { + struct frame_id id = frame_id_build_wild (addrs[0]); + struct frame_info *fid; + + /* If SETUP_ARBITRARY_FRAME is defined, then frame + specifications take at least 2 addresses. It is important to + detect this case here so that "frame 100" does not give a + confusing error message like "frame specification requires + two addresses". This of course does not solve the "frame + 100" problem for machines on which a frame specification can + be made with one address. To solve that, we need a new + syntax for a specifying a frame by address. I think the + cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for two + args, etc.), but people might think that is too much typing, + so I guess *0x23,0x45 would be a possible alternative (commas + really should be used instead of spaces to delimit; using + spaces normally works in an expression). */ #ifdef SETUP_ARBITRARY_FRAME - return SETUP_ARBITRARY_FRAME (numargs, args); -#else - /* Usual case. Do it here rather than have everyone supply - a SETUP_ARBITRARY_FRAME that does this. */ - if (numargs == 1) - return create_new_frame (args[0], 0); - error ("Too many args in frame specification"); + error ("No frame %s", paddr_d (addrs[0])); #endif - /* NOTREACHED */ - } - /* NOTREACHED */ -} + /* If (s)he specifies the frame with an address, he deserves + what (s)he gets. Still, give the highest one that matches. + (NOTE: cagney/2004-10-29: Why highest, or outer-most, I don't + know). */ + for (fid = get_current_frame (); + fid != NULL; + fid = get_prev_frame (fid)) + { + if (frame_id_eq (id, get_frame_id (fid))) + { + while (frame_id_eq (id, frame_unwind_id (fid))) + fid = get_prev_frame (fid); + return fid; + } + } + } -/* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except - that if it is unsure about the answer, it returns 0 - instead of guessing (this happens on the VAX and i960, for example). + /* We couldn't identify the frame as an existing frame, but + perhaps we can create one with a single argument. */ + if (numargs == 1) + return create_new_frame (addrs[0], 0); + else if (numargs == 2) + return create_new_frame (addrs[0], addrs[1]); + else + error ("Too many args in frame specification"); +} - On most machines, we never have to guess about the args address, - so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */ -#if !defined (FRAME_ARGS_ADDRESS_CORRECT) -#define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS -#endif +struct frame_info * +parse_frame_specification (char *frame_exp) +{ + return parse_frame_specification_1 (frame_exp, NULL, NULL); +} /* Print verbosely the selected frame or the frame at address ADDR. This means absolutely all information in the frame is printed. */ @@ -776,23 +871,33 @@ frame_info (char *addr_exp, int from_tty) int i, count, numregs; char *funname = 0; enum language funlang = language_unknown; + const char *pc_regname; + int selected_frame_p; + + fi = parse_frame_specification_1 (addr_exp, "No stack.", &selected_frame_p); + + /* Name of the value returned by get_frame_pc(). Per comments, "pc" + is not a good name. */ + if (PC_REGNUM >= 0) + /* OK, this is weird. The PC_REGNUM hardware register's value can + easily not match that of the internal value returned by + get_frame_pc(). */ + pc_regname = REGISTER_NAME (PC_REGNUM); + else + /* But then, this is weird to. Even without PC_REGNUM, an + architectures will often have a hardware register called "pc", + and that register's value, again, can easily not match + get_frame_pc(). */ + pc_regname = "pc"; - if (!target_has_stack) - error ("No stack."); - - fi = parse_frame_specification (addr_exp); - if (fi == NULL) - error ("Invalid frame specified."); - - sal = find_pc_line (fi->pc, - fi->next != NULL - && !fi->next->signal_handler_caller - && !frame_in_dummy (fi->next)); + find_frame_sal (fi, &sal); func = get_frame_function (fi); - s = find_pc_symtab (fi->pc); + /* FIXME: cagney/2002-11-28: Why bother? Won't sal.symtab contain + the same value. */ + s = find_pc_symtab (get_frame_pc (fi)); if (func) { - /* I'd like to use SYMBOL_SOURCE_NAME() here, to display + /* I'd like to use SYMBOL_PRINT_NAME() here, to display * the demangled name that we already have stored in * the symbol table, but we stored a version with * DMGL_PARAMS turned on, and here we don't want @@ -806,7 +911,7 @@ frame_info (char *addr_exp, int from_tty) * have our hands on the function symbol.) */ char *demangled; - funname = SYMBOL_NAME (func); + funname = DEPRECATED_SYMBOL_NAME (func); funlang = SYMBOL_LANGUAGE (func); if (funlang == language_cplus) { @@ -816,35 +921,35 @@ frame_info (char *addr_exp, int from_tty) * but that's preferable to diplaying a mangled name. */ if (demangled == NULL) - funname = SYMBOL_SOURCE_NAME (func); + funname = SYMBOL_PRINT_NAME (func); } } else { - register struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc); + struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (get_frame_pc (fi)); if (msymbol != NULL) { - funname = SYMBOL_NAME (msymbol); + funname = DEPRECATED_SYMBOL_NAME (msymbol); funlang = SYMBOL_LANGUAGE (msymbol); } } calling_frame_info = get_prev_frame (fi); - if (!addr_exp && frame_relative_level (selected_frame) >= 0) + if (selected_frame_p && frame_relative_level (fi) >= 0) { printf_filtered ("Stack level %d, frame at ", - frame_relative_level (selected_frame)); - print_address_numeric (fi->frame, 1, gdb_stdout); + frame_relative_level (fi)); + print_address_numeric (get_frame_base (fi), 1, gdb_stdout); printf_filtered (":\n"); } else { printf_filtered ("Stack frame at "); - print_address_numeric (fi->frame, 1, gdb_stdout); + print_address_numeric (get_frame_base (fi), 1, gdb_stdout); printf_filtered (":\n"); } - printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM)); - print_address_numeric (fi->pc, 1, gdb_stdout); + printf_filtered (" %s = ", pc_regname); + print_address_numeric (get_frame_pc (fi), 1, gdb_stdout); wrap_here (" "); if (funname) @@ -858,42 +963,34 @@ frame_info (char *addr_exp, int from_tty) printf_filtered (" (%s:%d)", sal.symtab->filename, sal.line); puts_filtered ("; "); wrap_here (" "); - printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM)); - print_address_numeric (FRAME_SAVED_PC (fi), 1, gdb_stdout); + printf_filtered ("saved %s ", pc_regname); + print_address_numeric (frame_pc_unwind (fi), 1, gdb_stdout); printf_filtered ("\n"); - { - int frameless; - frameless = FRAMELESS_FUNCTION_INVOCATION (fi); - if (frameless) - printf_filtered (" (FRAMELESS),"); - } - if (calling_frame_info) { printf_filtered (" called by frame at "); - print_address_numeric (calling_frame_info->frame, 1, gdb_stdout); + print_address_numeric (get_frame_base (calling_frame_info), + 1, gdb_stdout); } - if (fi->next && calling_frame_info) + if (get_next_frame (fi) && calling_frame_info) puts_filtered (","); wrap_here (" "); - if (fi->next) + if (get_next_frame (fi)) { printf_filtered (" caller of frame at "); - print_address_numeric (fi->next->frame, 1, gdb_stdout); + print_address_numeric (get_frame_base (get_next_frame (fi)), 1, + gdb_stdout); } - if (fi->next || calling_frame_info) + if (get_next_frame (fi) || calling_frame_info) puts_filtered ("\n"); if (s) - printf_filtered (" source language %s.\n", language_str (s->language)); - -#ifdef PRINT_EXTRA_FRAME_INFO - PRINT_EXTRA_FRAME_INFO (fi); -#endif + printf_filtered (" source language %s.\n", + language_str (s->language)); { /* Address of the argument list for this frame, or 0. */ - CORE_ADDR arg_list = FRAME_ARGS_ADDRESS_CORRECT (fi); + CORE_ADDR arg_list = get_frame_args_address (fi); /* Number of args for this frame, or -1 if unknown. */ int numargs; @@ -905,22 +1002,29 @@ frame_info (char *addr_exp, int from_tty) print_address_numeric (arg_list, 1, gdb_stdout); printf_filtered (","); - numargs = FRAME_NUM_ARGS (fi); - if (numargs < 0) - puts_filtered (" args: "); - else if (numargs == 0) - puts_filtered (" no args."); - else if (numargs == 1) - puts_filtered (" 1 arg: "); + if (!FRAME_NUM_ARGS_P ()) + { + numargs = -1; + puts_filtered (" args: "); + } else - printf_filtered (" %d args: ", numargs); + { + numargs = FRAME_NUM_ARGS (fi); + gdb_assert (numargs >= 0); + if (numargs == 0) + puts_filtered (" no args."); + else if (numargs == 1) + puts_filtered (" 1 arg: "); + else + printf_filtered (" %d args: ", numargs); + } print_frame_args (func, fi, numargs, gdb_stdout); puts_filtered ("\n"); } } { /* Address of the local variables for this frame, or 0. */ - CORE_ADDR arg_list = FRAME_LOCALS_ADDRESS (fi); + CORE_ADDR arg_list = get_frame_locals_address (fi); if (arg_list == 0) printf_filtered (" Locals at unknown address,"); @@ -932,8 +1036,6 @@ frame_info (char *addr_exp, int from_tty) } } - if (fi->saved_regs == NULL) - FRAME_INIT_SAVED_REGS (fi); /* Print as much information as possible on the location of all the registers. */ { @@ -958,11 +1060,14 @@ frame_info (char *addr_exp, int from_tty) &realnum, NULL); if (!optimized && lval == not_lval) { - void *value = alloca (MAX_REGISTER_RAW_SIZE); + char value[MAX_REGISTER_SIZE]; CORE_ADDR sp; frame_register_unwind (fi, SP_REGNUM, &optimized, &lval, &addr, &realnum, value); - sp = extract_address (value, REGISTER_RAW_SIZE (SP_REGNUM)); + /* NOTE: cagney/2003-05-22: This is assuming that the + stack pointer was packed as an unsigned integer. That + may or may not be valid. */ + sp = extract_unsigned_integer (value, register_size (current_gdbarch, SP_REGNUM)); printf_filtered (" Previous frame's sp is "); print_address_numeric (sp, 1, gdb_stdout); printf_filtered ("\n"); @@ -987,7 +1092,8 @@ frame_info (char *addr_exp, int from_tty) count = 0; numregs = NUM_REGS + NUM_PSEUDO_REGS; for (i = 0; i < numregs; i++) - if (i != SP_REGNUM) + if (i != SP_REGNUM + && gdbarch_register_reggroup_p (current_gdbarch, i, all_reggroup)) { /* Find out the location of the saved register without fetching the corresponding value. */ @@ -1012,33 +1118,6 @@ frame_info (char *addr_exp, int from_tty) } } -#if 0 -/* Set a limit on the number of frames printed by default in a - backtrace. */ - -static int backtrace_limit; - -static void -set_backtrace_limit_command (char *count_exp, int from_tty) -{ - int count = parse_and_eval_long (count_exp); - - if (count < 0) - error ("Negative argument not meaningful as backtrace limit."); - - backtrace_limit = count; -} - -static void -backtrace_limit_info (char *arg, int from_tty) -{ - if (arg) - error ("\"Info backtrace-limit\" takes no arguments."); - - printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit); -} -#endif - /* Print briefly all stack frames or just the innermost COUNT frames. */ static void backtrace_command_1 (char *count_exp, int show_locals, @@ -1047,10 +1126,10 @@ static void backtrace_command_1 (char *count_exp, int show_locals, int from_tty) { struct frame_info *fi; - register int count; - register int i; - register struct frame_info *trailing; - register int trailing_level; + int count; + int i; + struct frame_info *trailing; + int trailing_level; if (!target_has_stack) error ("No stack."); @@ -1114,7 +1193,7 @@ backtrace_command_1 (char *count_exp, int show_locals, int from_tty) fi = get_prev_frame (fi)) { QUIT; - ps = find_pc_psymtab (frame_address_in_block (fi)); + ps = find_pc_psymtab (get_frame_address_in_block (fi)); if (ps) PSYMTAB_TO_SYMTAB (ps); /* Force syms to come in */ } @@ -1130,7 +1209,7 @@ backtrace_command_1 (char *count_exp, int show_locals, int from_tty) means further attempts to backtrace would fail (on the other hand, perhaps the code does or could be fixed to make sure the frame->prev field gets set to NULL in that case). */ - print_frame_info_base (fi, trailing_level + i, 0, 1); + print_frame_info (fi, 1, LOCATION, 1); if (show_locals) print_frame_local_vars (fi, 1, gdb_stdout); } @@ -1140,6 +1219,22 @@ backtrace_command_1 (char *count_exp, int show_locals, int from_tty) printf_filtered ("(More stack frames follow...)\n"); } +struct backtrace_command_args + { + char *count_exp; + int show_locals; + int from_tty; + }; + +/* Stub to call backtrace_command_1 by way of an error catcher. */ +static int +backtrace_command_stub (void *data) +{ + struct backtrace_command_args *args = (struct backtrace_command_args *)data; + backtrace_command_1 (args->count_exp, args->show_locals, args->from_tty); + return 0; +} + static void backtrace_command (char *arg, int from_tty) { @@ -1147,6 +1242,7 @@ backtrace_command (char *arg, int from_tty) char **argv = (char **) NULL; int argIndicatingFullTrace = (-1), totArgLen = 0, argc = 0; char *argPtr = arg; + struct backtrace_command_args btargs; if (arg != (char *) NULL) { @@ -1196,7 +1292,10 @@ backtrace_command (char *arg, int from_tty) } } - backtrace_command_1 (argPtr, (argIndicatingFullTrace >= 0), from_tty); + btargs.count_exp = argPtr; + btargs.show_locals = (argIndicatingFullTrace >= 0); + btargs.from_tty = from_tty; + catch_errors (backtrace_command_stub, (char *)&btargs, "", RETURN_MASK_ERROR); if (argIndicatingFullTrace >= 0 && totArgLen > 0) xfree (argPtr); @@ -1209,7 +1308,11 @@ static void backtrace_full_command (char *arg, int from_tty); static void backtrace_full_command (char *arg, int from_tty) { - backtrace_command_1 (arg, 1, from_tty); + struct backtrace_command_args btargs; + btargs.count_exp = arg; + btargs.show_locals = 1; + btargs.from_tty = from_tty; + catch_errors (backtrace_command_stub, (char *)&btargs, "", RETURN_MASK_ERROR); } @@ -1217,14 +1320,15 @@ backtrace_full_command (char *arg, int from_tty) Return 1 if any variables were printed; 0 otherwise. */ static int -print_block_frame_locals (struct block *b, register struct frame_info *fi, - int num_tabs, register struct ui_file *stream) +print_block_frame_locals (struct block *b, struct frame_info *fi, + int num_tabs, struct ui_file *stream) { - register int i, j; - register struct symbol *sym; - register int values_printed = 0; + struct dict_iterator iter; + int j; + struct symbol *sym; + int values_printed = 0; - ALL_BLOCK_SYMBOLS (b, i, sym) + ALL_BLOCK_SYMBOLS (b, iter, sym) { switch (SYMBOL_CLASS (sym)) { @@ -1232,10 +1336,11 @@ print_block_frame_locals (struct block *b, register struct frame_info *fi, case LOC_REGISTER: case LOC_STATIC: case LOC_BASEREG: + case LOC_COMPUTED: values_printed = 1; for (j = 0; j < num_tabs; j++) fputs_filtered ("\t", stream); - fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream); + fputs_filtered (SYMBOL_PRINT_NAME (sym), stream); fputs_filtered (" = ", stream); print_variable_value (sym, fi, stream); fprintf_filtered (stream, "\n"); @@ -1253,15 +1358,15 @@ print_block_frame_locals (struct block *b, register struct frame_info *fi, static int print_block_frame_labels (struct block *b, int *have_default, - register struct ui_file *stream) + struct ui_file *stream) { - register int i; - register struct symbol *sym; - register int values_printed = 0; + struct dict_iterator iter; + struct symbol *sym; + int values_printed = 0; - ALL_BLOCK_SYMBOLS (b, i, sym) + ALL_BLOCK_SYMBOLS (b, iter, sym) { - if (STREQ (SYMBOL_NAME (sym), "default")) + if (strcmp (DEPRECATED_SYMBOL_NAME (sym), "default") == 0) { if (*have_default) continue; @@ -1272,7 +1377,7 @@ print_block_frame_labels (struct block *b, int *have_default, struct symtab_and_line sal; sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0); values_printed = 1; - fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream); + fputs_filtered (SYMBOL_PRINT_NAME (sym), stream); if (addressprint) { fprintf_filtered (stream, " "); @@ -1294,11 +1399,11 @@ print_block_frame_labels (struct block *b, int *have_default, on the function running in FRAME. */ static void -print_frame_local_vars (register struct frame_info *fi, register int num_tabs, - register struct ui_file *stream) +print_frame_local_vars (struct frame_info *fi, int num_tabs, + struct ui_file *stream) { - register struct block *block = get_frame_block (fi, 0); - register int values_printed = 0; + struct block *block = get_frame_block (fi, 0); + int values_printed = 0; if (block == 0) { @@ -1327,15 +1432,15 @@ print_frame_local_vars (register struct frame_info *fi, register int num_tabs, /* Same, but print labels. */ static void -print_frame_label_vars (register struct frame_info *fi, int this_level_only, - register struct ui_file *stream) +print_frame_label_vars (struct frame_info *fi, int this_level_only, + struct ui_file *stream) { - register struct blockvector *bl; - register struct block *block = get_frame_block (fi, 0); - register int values_printed = 0; + struct blockvector *bl; + struct block *block = get_frame_block (fi, 0); + int values_printed = 0; int index, have_default = 0; char *blocks_printed; - CORE_ADDR pc = fi->pc; + CORE_ADDR pc = get_frame_pc (fi); if (block == 0) { @@ -1394,13 +1499,11 @@ print_frame_label_vars (register struct frame_info *fi, int this_level_only, } } -/* ARGSUSED */ void locals_info (char *args, int from_tty) { - if (!selected_frame) - error ("No frame selected."); - print_frame_local_vars (selected_frame, 0, gdb_stdout); + print_frame_local_vars (get_selected_frame ("No frame selected."), + 0, gdb_stdout); } static void @@ -1416,30 +1519,24 @@ catch_info (char *ignore, int from_tty) /* Ideally, here we should interact with the C++ runtime system to find the list of active handlers, etc. */ fprintf_filtered (gdb_stdout, "Info catch not supported with this target/compiler combination.\n"); -#if 0 - if (!selected_frame) - error ("No frame selected."); -#endif } else { /* Assume g++ compiled code -- old v 4.16 behaviour */ - if (!selected_frame) - error ("No frame selected."); - - print_frame_label_vars (selected_frame, 0, gdb_stdout); + print_frame_label_vars (get_selected_frame ("No frame selected."), + 0, gdb_stdout); } } static void -print_frame_arg_vars (register struct frame_info *fi, - register struct ui_file *stream) +print_frame_arg_vars (struct frame_info *fi, + struct ui_file *stream) { struct symbol *func = get_frame_function (fi); - register struct block *b; - register int i; - register struct symbol *sym, *sym2; - register int values_printed = 0; + struct block *b; + struct dict_iterator iter; + struct symbol *sym, *sym2; + int values_printed = 0; if (func == 0) { @@ -1448,7 +1545,7 @@ print_frame_arg_vars (register struct frame_info *fi, } b = SYMBOL_BLOCK_VALUE (func); - ALL_BLOCK_SYMBOLS (b, i, sym) + ALL_BLOCK_SYMBOLS (b, iter, sym) { switch (SYMBOL_CLASS (sym)) { @@ -1458,8 +1555,9 @@ print_frame_arg_vars (register struct frame_info *fi, case LOC_REGPARM: case LOC_REGPARM_ADDR: case LOC_BASEREG_ARG: + case LOC_COMPUTED_ARG: values_printed = 1; - fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream); + fputs_filtered (SYMBOL_PRINT_NAME (sym), stream); fputs_filtered (" = ", stream); /* We have to look up the symbol because arguments can have @@ -1473,8 +1571,8 @@ print_frame_arg_vars (register struct frame_info *fi, float). There are also LOC_ARG/LOC_REGISTER pairs which are not combined in symbol-reading. */ - sym2 = lookup_symbol (SYMBOL_NAME (sym), - b, VAR_NAMESPACE, (int *) NULL, (struct symtab **) NULL); + sym2 = lookup_symbol (DEPRECATED_SYMBOL_NAME (sym), + b, VAR_DOMAIN, (int *) NULL, (struct symtab **) NULL); print_variable_value (sym2, fi, stream); fprintf_filtered (stream, "\n"); break; @@ -1493,9 +1591,8 @@ print_frame_arg_vars (register struct frame_info *fi, void args_info (char *ignore, int from_tty) { - if (!selected_frame) - error ("No frame selected."); - print_frame_arg_vars (selected_frame, gdb_stdout); + print_frame_arg_vars (get_selected_frame ("No frame selected."), + gdb_stdout); } @@ -1507,44 +1604,6 @@ args_plus_locals_info (char *ignore, int from_tty) } -/* Select frame FI (or NULL - to invalidate the current frame). */ - -void -select_frame (struct frame_info *fi) -{ - register struct symtab *s; - - selected_frame = fi; - /* NOTE: cagney/2002-05-04: FI can be NULL. This occures when the - frame is being invalidated. */ - if (selected_frame_level_changed_hook) - selected_frame_level_changed_hook (frame_relative_level (fi)); - - /* FIXME: kseitz/2002-08-28: It would be nice to call - selected_frame_level_changed_event right here, but due to limitations - in the current interfaces, we would end up flooding UIs with events - because select_frame is used extensively internally. - - Once we have frame-parameterized frame (and frame-related) commands, - the event notification can be moved here, since this function will only - be called when the users selected frame is being changed. */ - - /* Ensure that symbols for this frame are read in. Also, determine the - source language of this frame, and switch to it if desired. */ - if (fi) - { - s = find_pc_symtab (fi->pc); - if (s - && s->language != current_language->la_language - && s->language != language_unknown - && language_mode == language_mode_auto) - { - set_language (s->language); - } - } -} - - /* Select frame FI. Also print the stack frame and show the source if this is the tui version. */ static void @@ -1552,9 +1611,7 @@ select_and_print_frame (struct frame_info *fi) { select_frame (fi); if (fi) - { - print_stack_frame (fi, frame_relative_level (fi), 1); - } + print_stack_frame (fi, 1, SRC_AND_LOC); } /* Return the symbol-block in which the selected frame is executing. @@ -1570,9 +1627,24 @@ get_selected_block (CORE_ADDR *addr_in_block) if (!target_has_stack) return 0; - if (!selected_frame) - return get_current_block (addr_in_block); - return get_frame_block (selected_frame, addr_in_block); + /* NOTE: cagney/2002-11-28: Why go to all this effort to not create + a selected/current frame? Perhaps this function is called, + indirectly, by WFI in "infrun.c" where avoiding the creation of + an inner most frame is very important (it slows down single + step). I suspect, though that this was true in the deep dark + past but is no longer the case. A mindless look at all the + callers tends to support this theory. I think we should be able + to assume that there is always a selcted frame. */ + /* gdb_assert (deprecated_selected_frame != NULL); So, do you feel + lucky? */ + if (!deprecated_selected_frame) + { + CORE_ADDR pc = read_pc (); + if (addr_in_block != NULL) + *addr_in_block = pc; + return block_for_pc (pc); + } + return get_frame_block (deprecated_selected_frame, addr_in_block); } /* Find a frame a certain number of levels away from FRAME. @@ -1585,11 +1657,11 @@ get_selected_block (CORE_ADDR *addr_in_block) how much farther the original request asked to go. */ struct frame_info * -find_relative_frame (register struct frame_info *frame, - register int *level_offset_ptr) +find_relative_frame (struct frame_info *frame, + int *level_offset_ptr) { - register struct frame_info *prev; - register struct frame_info *frame1; + struct frame_info *prev; + struct frame_info *frame1; /* Going up is simple: just do get_prev_frame enough times or until initial frame is reached. */ @@ -1622,27 +1694,10 @@ find_relative_frame (register struct frame_info *frame, and select it. See parse_frame_specification for more info on proper frame expressions. */ -/* ARGSUSED */ void -select_frame_command_wrapper (char *level_exp, int from_tty) -{ - select_frame_command (level_exp, from_tty); -} - -static void select_frame_command (char *level_exp, int from_tty) { - struct frame_info *frame; - int level = frame_relative_level (selected_frame); - - if (!target_has_stack) - error ("No stack."); - - frame = parse_frame_specification (level_exp); - - select_frame (frame); - if (level != frame_relative_level (selected_frame)) - selected_frame_level_changed_event (frame_relative_level (selected_frame)); + select_frame (parse_frame_specification_1 (level_exp, "No stack.", NULL)); } /* The "frame" command. With no arg, print selected frame briefly. @@ -1653,8 +1708,7 @@ void frame_command (char *level_exp, int from_tty) { select_frame_command (level_exp, from_tty); - show_and_print_stack_frame (selected_frame, - frame_relative_level (selected_frame), 1); + print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); } /* The XDB Compatibility command to print the current frame. */ @@ -1662,33 +1716,25 @@ frame_command (char *level_exp, int from_tty) static void current_frame_command (char *level_exp, int from_tty) { - if (target_has_stack == 0 || selected_frame == 0) - error ("No stack."); - print_only_stack_frame (selected_frame, - frame_relative_level (selected_frame), 1); + print_stack_frame (get_selected_frame ("No stack."), 1, SRC_AND_LOC); } /* Select the frame up one or COUNT stack levels from the previously selected frame, and print it briefly. */ -/* ARGSUSED */ static void up_silently_base (char *count_exp) { - register struct frame_info *fi; + struct frame_info *fi; int count = 1, count1; if (count_exp) count = parse_and_eval_long (count_exp); count1 = count; - if (target_has_stack == 0 || selected_frame == 0) - error ("No stack."); - - fi = find_relative_frame (selected_frame, &count1); + fi = find_relative_frame (get_selected_frame ("No stack."), &count1); if (count1 != 0 && count_exp == 0) error ("Initial frame selected; you cannot go up."); select_frame (fi); - selected_frame_level_changed_event (frame_relative_level (selected_frame)); } static void @@ -1701,27 +1747,22 @@ static void up_command (char *count_exp, int from_tty) { up_silently_base (count_exp); - show_and_print_stack_frame (selected_frame, - frame_relative_level (selected_frame), 1); + print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); } /* Select the frame down one or COUNT stack levels from the previously selected frame, and print it briefly. */ -/* ARGSUSED */ static void down_silently_base (char *count_exp) { - register struct frame_info *frame; + struct frame_info *frame; int count = -1, count1; if (count_exp) count = -parse_and_eval_long (count_exp); count1 = count; - if (target_has_stack == 0 || selected_frame == 0) - error ("No stack."); - - frame = find_relative_frame (selected_frame, &count1); + frame = find_relative_frame (get_selected_frame ("No stack."), &count1); if (count1 != 0 && count_exp == 0) { @@ -1734,10 +1775,8 @@ down_silently_base (char *count_exp) } select_frame (frame); - selected_frame_level_changed_event (frame_relative_level (selected_frame)); } -/* ARGSUSED */ static void down_silently_command (char *count_exp, int from_tty) { @@ -1748,95 +1787,132 @@ static void down_command (char *count_exp, int from_tty) { down_silently_base (count_exp); - show_and_print_stack_frame (selected_frame, - frame_relative_level (selected_frame), 1); + print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); } void -return_command_wrapper (char *retval_exp, int from_tty) -{ - return_command (retval_exp, from_tty); -} - -static void return_command (char *retval_exp, int from_tty) { struct symbol *thisfun; - CORE_ADDR selected_frame_addr; - CORE_ADDR selected_frame_pc; - struct frame_info *frame; struct value *return_value = NULL; + const char *query_prefix = ""; - if (selected_frame == NULL) - error ("No selected frame."); - thisfun = get_frame_function (selected_frame); - selected_frame_addr = FRAME_FP (selected_frame); - selected_frame_pc = selected_frame->pc; - - /* Compute the return value (if any -- possibly getting errors here). */ + thisfun = get_frame_function (get_selected_frame ("No selected frame.")); + /* Compute the return value. If the computation triggers an error, + let it bail. If the return type can't be handled, set + RETURN_VALUE to NULL, and QUERY_PREFIX to an informational + message. */ if (retval_exp) { struct type *return_type = NULL; + /* Compute the return value. Should the computation fail, this + call throws an error. */ return_value = parse_and_eval (retval_exp); - /* Cast return value to the return type of the function. */ + /* Cast return value to the return type of the function. Should + the cast fail, this call throws an error. */ if (thisfun != NULL) return_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun)); if (return_type == NULL) return_type = builtin_type_int; + CHECK_TYPEDEF (return_type); return_value = value_cast (return_type, return_value); - /* Make sure we have fully evaluated it, since - it might live in the stack frame we're about to pop. */ + /* Make sure the value is fully evaluated. It may live in the + stack frame we're about to pop. */ if (VALUE_LAZY (return_value)) value_fetch_lazy (return_value); - } - /* If interactive, require confirmation. */ - - if (from_tty) - { - if (thisfun != 0) + if (TYPE_CODE (return_type) == TYPE_CODE_VOID) + /* If the return-type is "void", don't try to find the + return-value's location. However, do still evaluate the + return expression so that, even when the expression result + is discarded, side effects such as "return i++" still + occure. */ + return_value = NULL; + /* FIXME: cagney/2004-01-17: If the architecture implements both + return_value and extract_returned_value_address, should allow + "return" to work - don't set return_value to NULL. */ + else if (!gdbarch_return_value_p (current_gdbarch) + && (TYPE_CODE (return_type) == TYPE_CODE_STRUCT + || TYPE_CODE (return_type) == TYPE_CODE_UNION)) { - if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun))) - { - error ("Not confirmed."); - /* NOTREACHED */ - } + /* NOTE: cagney/2003-10-20: Compatibility hack for legacy + code. Old architectures don't expect STORE_RETURN_VALUE + to be called with with a small struct that needs to be + stored in registers. Don't start doing it now. */ + query_prefix = "\ +A structure or union return type is not supported by this architecture.\n\ +If you continue, the return value that you specified will be ignored.\n"; + return_value = NULL; + } + else if (using_struct_return (return_type, 0)) + { + query_prefix = "\ +The location at which to store the function's return value is unknown.\n\ +If you continue, the return value that you specified will be ignored.\n"; + return_value = NULL; } - else if (!query ("Make selected stack frame return now? ")) - error ("Not confirmed."); } - /* Do the real work. Pop until the specified frame is current. We - use this method because the selected_frame is not valid after - a POP_FRAME. The pc comparison makes this work even if the - selected frame shares its fp with another frame. */ - - while (selected_frame_addr != (frame = get_current_frame ())->frame - || selected_frame_pc != frame->pc) - POP_FRAME; - - /* Then pop that frame. */ + /* Does an interactive user really want to do this? Include + information, such as how well GDB can handle the return value, in + the query message. */ + if (from_tty) + { + int confirmed; + if (thisfun == NULL) + confirmed = query ("%sMake selected stack frame return now? ", + query_prefix); + else + confirmed = query ("%sMake %s return now? ", query_prefix, + SYMBOL_PRINT_NAME (thisfun)); + if (!confirmed) + error ("Not confirmed"); + } - POP_FRAME; + /* NOTE: cagney/2003-01-18: Is this silly? Rather than pop each + frame in turn, should this code just go straight to the relevant + frame and pop that? */ - /* Compute the return value (if any) and store in the place - for return values. */ + /* First discard all frames inner-to the selected frame (making the + selected frame current). */ + { + struct frame_id selected_id = get_frame_id (get_selected_frame (NULL)); + while (!frame_id_eq (selected_id, get_frame_id (get_current_frame ()))) + { + if (frame_id_inner (selected_id, get_frame_id (get_current_frame ()))) + /* Caught in the safety net, oops! We've gone way past the + selected frame. */ + error ("Problem while popping stack frames (corrupt stack?)"); + frame_pop (get_current_frame ()); + } + } - if (retval_exp) - set_return_value (return_value); + /* Second discard the selected frame (which is now also the current + frame). */ + frame_pop (get_current_frame ()); - /* If we are at the end of a call dummy now, pop the dummy frame too. */ + /* Store RETURN_VAUE in the just-returned register set. */ + if (return_value != NULL) + { + struct type *return_type = value_type (return_value); + gdb_assert (gdbarch_return_value (current_gdbarch, return_type, + NULL, NULL, NULL) + == RETURN_VALUE_REGISTER_CONVENTION); + gdbarch_return_value (current_gdbarch, return_type, + current_regcache, NULL /*read*/, + VALUE_CONTENTS (return_value) /*write*/); + } - if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (), - FRAME_FP (get_current_frame ()))) - POP_FRAME; + /* If we are at the end of a call dummy now, pop the dummy frame + too. */ + if (get_frame_type (get_current_frame ()) == DUMMY_FRAME) + frame_pop (get_current_frame ()); /* If interactive, print the frame that is now current. */ - if (from_tty) frame_command ("0", 1); else @@ -1885,8 +1961,8 @@ func_command (char *arg, int from_tty) do { for (i = 0; (i < sals.nelts && !found); i++) - found = (fp->pc >= func_bounds[i].low && - fp->pc < func_bounds[i].high); + found = (get_frame_pc (fp) >= func_bounds[i].low && + get_frame_pc (fp) < func_bounds[i].high); if (!found) { level = 1; @@ -1900,7 +1976,7 @@ func_command (char *arg, int from_tty) if (!found) printf_filtered ("'%s' not within current stack frame.\n", arg); - else if (fp != selected_frame) + else if (fp != deprecated_selected_frame) select_and_print_frame (fp); } @@ -1909,12 +1985,19 @@ func_command (char *arg, int from_tty) enum language get_frame_language (void) { - register struct symtab *s; + struct symtab *s; enum language flang; /* The language of the current frame */ - if (selected_frame) + if (deprecated_selected_frame) { - s = find_pc_symtab (selected_frame->pc); + /* We determine the current frame language by looking up its + associated symtab. To retrieve this symtab, we use the frame PC. + However we cannot use the frame pc as is, because it usually points + to the instruction following the "call", which is sometimes the first + instruction of another function. So we rely on + get_frame_address_in_block(), it provides us with a PC which is + guaranteed to be inside the frame's code block. */ + s = find_pc_symtab (get_frame_address_in_block (deprecated_selected_frame)); if (s) flang = s->language; else