| /* Print and select stack frames for GDB, the GNU debugger. |
| |
| Copyright (C) 1986-2017 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "defs.h" |
| #include "value.h" |
| #include "symtab.h" |
| #include "gdbtypes.h" |
| #include "expression.h" |
| #include "language.h" |
| #include "frame.h" |
| #include "gdbcmd.h" |
| #include "gdbcore.h" |
| #include "target.h" |
| #include "source.h" |
| #include "breakpoint.h" |
| #include "demangle.h" |
| #include "inferior.h" |
| #include "annotate.h" |
| #include "ui-out.h" |
| #include "block.h" |
| #include "stack.h" |
| #include "dictionary.h" |
| #include "reggroups.h" |
| #include "regcache.h" |
| #include "solib.h" |
| #include "valprint.h" |
| #include "gdbthread.h" |
| #include "cp-support.h" |
| #include "disasm.h" |
| #include "inline-frame.h" |
| #include "linespec.h" |
| #include "cli/cli-utils.h" |
| #include "objfiles.h" |
| |
| #include "safe-ctype.h" |
| #include "symfile.h" |
| #include "extension.h" |
| #include "observer.h" |
| |
| /* The possible choices of "set print frame-arguments", and the value |
| of this setting. */ |
| |
| static const char *const print_frame_arguments_choices[] = |
| {"all", "scalars", "none", NULL}; |
| static const char *print_frame_arguments = "scalars"; |
| |
| /* If non-zero, don't invoke pretty-printers for frame arguments. */ |
| static int print_raw_frame_arguments; |
| |
| /* The possible choices of "set print entry-values", and the value |
| of this setting. */ |
| |
| const char print_entry_values_no[] = "no"; |
| const char print_entry_values_only[] = "only"; |
| const char print_entry_values_preferred[] = "preferred"; |
| const char print_entry_values_if_needed[] = "if-needed"; |
| const char print_entry_values_both[] = "both"; |
| const char print_entry_values_compact[] = "compact"; |
| const char print_entry_values_default[] = "default"; |
| static const char *const print_entry_values_choices[] = |
| { |
| print_entry_values_no, |
| print_entry_values_only, |
| print_entry_values_preferred, |
| print_entry_values_if_needed, |
| print_entry_values_both, |
| print_entry_values_compact, |
| print_entry_values_default, |
| NULL |
| }; |
| const char *print_entry_values = print_entry_values_default; |
| |
| /* Prototypes for local functions. */ |
| |
| static void print_frame_local_vars (struct frame_info *, int, |
| struct ui_file *); |
| |
| static void print_frame (struct frame_info *frame, int print_level, |
| enum print_what print_what, int print_args, |
| struct symtab_and_line sal); |
| |
| static void set_last_displayed_sal (int valid, |
| struct program_space *pspace, |
| CORE_ADDR addr, |
| struct symtab *symtab, |
| int line); |
| |
| /* 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 |
| parse. Two means print similar annotations, but in many more |
| cases and in a slightly different syntax. */ |
| |
| int annotation_level = 0; |
| |
| /* These variables hold the last symtab and line we displayed to the user. |
| * This is where we insert a breakpoint or a skiplist entry by default. */ |
| static int last_displayed_sal_valid = 0; |
| static struct program_space *last_displayed_pspace = 0; |
| static CORE_ADDR last_displayed_addr = 0; |
| static struct symtab *last_displayed_symtab = 0; |
| static int last_displayed_line = 0; |
| |
| |
| /* Return 1 if we should display the address in addition to the location, |
| because we are in the middle of a statement. */ |
| |
| static int |
| frame_show_address (struct frame_info *frame, |
| struct symtab_and_line sal) |
| { |
| /* If there is a line number, but no PC, then there is no location |
| information associated with this sal. The only way that should |
| happen is for the call sites of inlined functions (SAL comes from |
| find_frame_sal). Otherwise, we would have some PC range if the |
| SAL came from a line table. */ |
| if (sal.line != 0 && sal.pc == 0 && sal.end == 0) |
| { |
| if (get_next_frame (frame) == NULL) |
| gdb_assert (inline_skipped_frames (inferior_ptid) > 0); |
| else |
| gdb_assert (get_frame_type (get_next_frame (frame)) == INLINE_FRAME); |
| return 0; |
| } |
| |
| return get_frame_pc (frame) != sal.pc; |
| } |
| |
| /* See frame.h. */ |
| |
| void |
| print_stack_frame_to_uiout (struct ui_out *uiout, struct frame_info *frame, |
| int print_level, enum print_what print_what, |
| int set_current_sal) |
| { |
| scoped_restore save_uiout = make_scoped_restore (¤t_uiout, uiout); |
| |
| print_stack_frame (frame, print_level, print_what, set_current_sal); |
| } |
| |
| /* Show or print a stack frame FRAME briefly. The output is formatted |
| 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 *frame, int print_level, |
| enum print_what print_what, |
| int set_current_sal) |
| { |
| |
| /* For mi, alway print location and address. */ |
| if (current_uiout->is_mi_like_p ()) |
| print_what = LOC_AND_ADDRESS; |
| |
| TRY |
| { |
| print_frame_info (frame, print_level, print_what, 1 /* print_args */, |
| set_current_sal); |
| if (set_current_sal) |
| set_current_sal_from_frame (frame); |
| } |
| CATCH (e, RETURN_MASK_ERROR) |
| { |
| } |
| END_CATCH |
| } |
| |
| /* Print nameless arguments of frame FRAME on STREAM, where START is |
| the offset of the first nameless argument, and NUM is the number of |
| nameless arguments to print. FIRST is nonzero if this is the first |
| argument (not just the first nameless argument). */ |
| |
| static void |
| print_frame_nameless_args (struct frame_info *frame, long start, int num, |
| int first, struct ui_file *stream) |
| { |
| struct gdbarch *gdbarch = get_frame_arch (frame); |
| enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| int i; |
| CORE_ADDR argsaddr; |
| long arg_value; |
| |
| for (i = 0; i < num; i++) |
| { |
| QUIT; |
| argsaddr = get_frame_args_address (frame); |
| if (!argsaddr) |
| return; |
| arg_value = read_memory_integer (argsaddr + start, |
| sizeof (int), byte_order); |
| if (!first) |
| fprintf_filtered (stream, ", "); |
| fprintf_filtered (stream, "%ld", arg_value); |
| first = 0; |
| start += sizeof (int); |
| } |
| } |
| |
| /* Print single argument of inferior function. ARG must be already |
| read in. |
| |
| Errors are printed as if they would be the parameter value. Use zeroed ARG |
| iff it should not be printed accoring to user settings. */ |
| |
| static void |
| print_frame_arg (const struct frame_arg *arg) |
| { |
| struct ui_out *uiout = current_uiout; |
| struct cleanup *old_chain; |
| struct ui_file *stb; |
| const char *error_message = NULL; |
| |
| stb = mem_fileopen (); |
| old_chain = make_cleanup_ui_file_delete (stb); |
| |
| gdb_assert (!arg->val || !arg->error); |
| gdb_assert (arg->entry_kind == print_entry_values_no |
| || arg->entry_kind == print_entry_values_only |
| || (!uiout->is_mi_like_p () |
| && arg->entry_kind == print_entry_values_compact)); |
| |
| annotate_arg_begin (); |
| |
| make_cleanup_ui_out_tuple_begin_end (uiout, NULL); |
| fprintf_symbol_filtered (stb, SYMBOL_PRINT_NAME (arg->sym), |
| SYMBOL_LANGUAGE (arg->sym), DMGL_PARAMS | DMGL_ANSI); |
| if (arg->entry_kind == print_entry_values_compact) |
| { |
| /* It is OK to provide invalid MI-like stream as with |
| PRINT_ENTRY_VALUE_COMPACT we never use MI. */ |
| fputs_filtered ("=", stb); |
| |
| fprintf_symbol_filtered (stb, SYMBOL_PRINT_NAME (arg->sym), |
| SYMBOL_LANGUAGE (arg->sym), |
| DMGL_PARAMS | DMGL_ANSI); |
| } |
| if (arg->entry_kind == print_entry_values_only |
| || arg->entry_kind == print_entry_values_compact) |
| fputs_filtered ("@entry", stb); |
| uiout->field_stream ("name", stb); |
| annotate_arg_name_end (); |
| uiout->text ("="); |
| |
| if (!arg->val && !arg->error) |
| uiout->text ("..."); |
| else |
| { |
| if (arg->error) |
| error_message = arg->error; |
| else |
| { |
| TRY |
| { |
| const struct language_defn *language; |
| struct value_print_options opts; |
| |
| /* 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. */ |
| |
| annotate_arg_value (value_type (arg->val)); |
| |
| /* Use the appropriate language to display our symbol, unless the |
| user forced the language to a specific language. */ |
| if (language_mode == language_mode_auto) |
| language = language_def (SYMBOL_LANGUAGE (arg->sym)); |
| else |
| language = current_language; |
| |
| get_no_prettyformat_print_options (&opts); |
| opts.deref_ref = 1; |
| opts.raw = print_raw_frame_arguments; |
| |
| /* True in "summary" mode, false otherwise. */ |
| opts.summary = !strcmp (print_frame_arguments, "scalars"); |
| |
| common_val_print (arg->val, stb, 2, &opts, language); |
| } |
| CATCH (except, RETURN_MASK_ERROR) |
| { |
| error_message = except.message; |
| } |
| END_CATCH |
| } |
| if (error_message != NULL) |
| fprintf_filtered (stb, _("<error reading variable: %s>"), |
| error_message); |
| } |
| |
| uiout->field_stream ("value", stb); |
| |
| /* Also invoke ui_out_tuple_end. */ |
| do_cleanups (old_chain); |
| |
| annotate_arg_end (); |
| } |
| |
| /* Read in inferior function local SYM at FRAME into ARGP. Caller is |
| responsible for xfree of ARGP->ERROR. This function never throws an |
| exception. */ |
| |
| void |
| read_frame_local (struct symbol *sym, struct frame_info *frame, |
| struct frame_arg *argp) |
| { |
| argp->sym = sym; |
| argp->val = NULL; |
| argp->error = NULL; |
| |
| TRY |
| { |
| argp->val = read_var_value (sym, NULL, frame); |
| } |
| CATCH (except, RETURN_MASK_ERROR) |
| { |
| argp->error = xstrdup (except.message); |
| } |
| END_CATCH |
| } |
| |
| /* Read in inferior function parameter SYM at FRAME into ARGP. Caller is |
| responsible for xfree of ARGP->ERROR. This function never throws an |
| exception. */ |
| |
| void |
| read_frame_arg (struct symbol *sym, struct frame_info *frame, |
| struct frame_arg *argp, struct frame_arg *entryargp) |
| { |
| struct value *val = NULL, *entryval = NULL; |
| char *val_error = NULL, *entryval_error = NULL; |
| int val_equal = 0; |
| |
| if (print_entry_values != print_entry_values_only |
| && print_entry_values != print_entry_values_preferred) |
| { |
| TRY |
| { |
| val = read_var_value (sym, NULL, frame); |
| } |
| CATCH (except, RETURN_MASK_ERROR) |
| { |
| val_error = (char *) alloca (strlen (except.message) + 1); |
| strcpy (val_error, except.message); |
| } |
| END_CATCH |
| } |
| |
| if (SYMBOL_COMPUTED_OPS (sym) != NULL |
| && SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry != NULL |
| && print_entry_values != print_entry_values_no |
| && (print_entry_values != print_entry_values_if_needed |
| || !val || value_optimized_out (val))) |
| { |
| TRY |
| { |
| const struct symbol_computed_ops *ops; |
| |
| ops = SYMBOL_COMPUTED_OPS (sym); |
| entryval = ops->read_variable_at_entry (sym, frame); |
| } |
| CATCH (except, RETURN_MASK_ERROR) |
| { |
| if (except.error != NO_ENTRY_VALUE_ERROR) |
| { |
| entryval_error = (char *) alloca (strlen (except.message) + 1); |
| strcpy (entryval_error, except.message); |
| } |
| } |
| END_CATCH |
| |
| if (entryval != NULL && value_optimized_out (entryval)) |
| entryval = NULL; |
| |
| if (print_entry_values == print_entry_values_compact |
| || print_entry_values == print_entry_values_default) |
| { |
| /* For MI do not try to use print_entry_values_compact for ARGP. */ |
| |
| if (val && entryval && !current_uiout->is_mi_like_p ()) |
| { |
| struct type *type = value_type (val); |
| |
| if (value_lazy (val)) |
| value_fetch_lazy (val); |
| if (value_lazy (entryval)) |
| value_fetch_lazy (entryval); |
| |
| if (value_contents_eq (val, 0, entryval, 0, TYPE_LENGTH (type))) |
| { |
| /* Initialize it just to avoid a GCC false warning. */ |
| struct value *val_deref = NULL, *entryval_deref; |
| |
| /* DW_AT_GNU_call_site_value does match with the current |
| value. If it is a reference still try to verify if |
| dereferenced DW_AT_GNU_call_site_data_value does not |
| differ. */ |
| |
| TRY |
| { |
| struct type *type_deref; |
| |
| val_deref = coerce_ref (val); |
| if (value_lazy (val_deref)) |
| value_fetch_lazy (val_deref); |
| type_deref = value_type (val_deref); |
| |
| entryval_deref = coerce_ref (entryval); |
| if (value_lazy (entryval_deref)) |
| value_fetch_lazy (entryval_deref); |
| |
| /* If the reference addresses match but dereferenced |
| content does not match print them. */ |
| if (val != val_deref |
| && value_contents_eq (val_deref, 0, |
| entryval_deref, 0, |
| TYPE_LENGTH (type_deref))) |
| val_equal = 1; |
| } |
| CATCH (except, RETURN_MASK_ERROR) |
| { |
| /* If the dereferenced content could not be |
| fetched do not display anything. */ |
| if (except.error == NO_ENTRY_VALUE_ERROR) |
| val_equal = 1; |
| else if (except.message != NULL) |
| { |
| entryval_error = (char *) alloca (strlen (except.message) + 1); |
| strcpy (entryval_error, except.message); |
| } |
| } |
| END_CATCH |
| |
| /* Value was not a reference; and its content matches. */ |
| if (val == val_deref) |
| val_equal = 1; |
| |
| if (val_equal) |
| entryval = NULL; |
| } |
| } |
| |
| /* Try to remove possibly duplicate error message for ENTRYARGP even |
| in MI mode. */ |
| |
| if (val_error && entryval_error |
| && strcmp (val_error, entryval_error) == 0) |
| { |
| entryval_error = NULL; |
| |
| /* Do not se VAL_EQUAL as the same error message may be shown for |
| the entry value even if no entry values are present in the |
| inferior. */ |
| } |
| } |
| } |
| |
| if (entryval == NULL) |
| { |
| if (print_entry_values == print_entry_values_preferred) |
| { |
| gdb_assert (val == NULL); |
| |
| TRY |
| { |
| val = read_var_value (sym, NULL, frame); |
| } |
| CATCH (except, RETURN_MASK_ERROR) |
| { |
| val_error = (char *) alloca (strlen (except.message) + 1); |
| strcpy (val_error, except.message); |
| } |
| END_CATCH |
| } |
| if (print_entry_values == print_entry_values_only |
| || print_entry_values == print_entry_values_both |
| || (print_entry_values == print_entry_values_preferred |
| && (!val || value_optimized_out (val)))) |
| { |
| entryval = allocate_optimized_out_value (SYMBOL_TYPE (sym)); |
| entryval_error = NULL; |
| } |
| } |
| if ((print_entry_values == print_entry_values_compact |
| || print_entry_values == print_entry_values_if_needed |
| || print_entry_values == print_entry_values_preferred) |
| && (!val || value_optimized_out (val)) && entryval != NULL) |
| { |
| val = NULL; |
| val_error = NULL; |
| } |
| |
| argp->sym = sym; |
| argp->val = val; |
| argp->error = val_error ? xstrdup (val_error) : NULL; |
| if (!val && !val_error) |
| argp->entry_kind = print_entry_values_only; |
| else if ((print_entry_values == print_entry_values_compact |
| || print_entry_values == print_entry_values_default) && val_equal) |
| { |
| argp->entry_kind = print_entry_values_compact; |
| gdb_assert (!current_uiout->is_mi_like_p ()); |
| } |
| else |
| argp->entry_kind = print_entry_values_no; |
| |
| entryargp->sym = sym; |
| entryargp->val = entryval; |
| entryargp->error = entryval_error ? xstrdup (entryval_error) : NULL; |
| if (!entryval && !entryval_error) |
| entryargp->entry_kind = print_entry_values_no; |
| else |
| entryargp->entry_kind = print_entry_values_only; |
| } |
| |
| /* Print the arguments of frame FRAME on STREAM, given the function |
| FUNC running in that frame (as a symbol), where NUM is the number |
| of arguments according to the stack frame (or -1 if the number of |
| arguments is unknown). */ |
| |
| /* Note that currently the "number of arguments according to the |
| stack frame" is only known on VAX where i refers to the "number of |
| ints of arguments according to the stack frame". */ |
| |
| static void |
| print_frame_args (struct symbol *func, struct frame_info *frame, |
| int num, struct ui_file *stream) |
| { |
| struct ui_out *uiout = current_uiout; |
| int first = 1; |
| /* Offset of next stack argument beyond the one we have seen that is |
| at the highest offset, or -1 if we haven't come to a stack |
| argument yet. */ |
| long highest_offset = -1; |
| /* Number of ints of arguments that we have printed so far. */ |
| int args_printed = 0; |
| struct cleanup *old_chain; |
| struct ui_file *stb; |
| /* True if we should print arguments, false otherwise. */ |
| int print_args = strcmp (print_frame_arguments, "none"); |
| |
| stb = mem_fileopen (); |
| old_chain = make_cleanup_ui_file_delete (stb); |
| |
| if (func) |
| { |
| const struct block *b = SYMBOL_BLOCK_VALUE (func); |
| struct block_iterator iter; |
| struct symbol *sym; |
| |
| ALL_BLOCK_SYMBOLS (b, iter, sym) |
| { |
| struct frame_arg arg, entryarg; |
| |
| QUIT; |
| |
| /* Keep track of the highest stack argument offset seen, and |
| skip over any kinds of symbols we don't care about. */ |
| |
| if (!SYMBOL_IS_ARGUMENT (sym)) |
| continue; |
| |
| switch (SYMBOL_CLASS (sym)) |
| { |
| case LOC_ARG: |
| case LOC_REF_ARG: |
| { |
| long current_offset = SYMBOL_VALUE (sym); |
| int 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_REGISTER: |
| case LOC_REGPARM_ADDR: |
| case LOC_COMPUTED: |
| case LOC_OPTIMIZED_OUT: |
| default: |
| break; |
| } |
| |
| /* 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 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_LINKAGE_NAME (sym)) |
| { |
| struct symbol *nsym; |
| |
| nsym = lookup_symbol (SYMBOL_LINKAGE_NAME (sym), |
| b, VAR_DOMAIN, NULL).symbol; |
| gdb_assert (nsym != NULL); |
| if (SYMBOL_CLASS (nsym) == LOC_REGISTER |
| && !SYMBOL_IS_ARGUMENT (nsym)) |
| { |
| /* 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) |
| uiout->text (", "); |
| uiout->wrap_hint (" "); |
| |
| if (!print_args) |
| { |
| memset (&arg, 0, sizeof (arg)); |
| arg.sym = sym; |
| arg.entry_kind = print_entry_values_no; |
| memset (&entryarg, 0, sizeof (entryarg)); |
| entryarg.sym = sym; |
| entryarg.entry_kind = print_entry_values_no; |
| } |
| else |
| read_frame_arg (sym, frame, &arg, &entryarg); |
| |
| if (arg.entry_kind != print_entry_values_only) |
| print_frame_arg (&arg); |
| |
| if (entryarg.entry_kind != print_entry_values_no) |
| { |
| if (arg.entry_kind != print_entry_values_only) |
| { |
| uiout->text (", "); |
| uiout->wrap_hint (" "); |
| } |
| |
| print_frame_arg (&entryarg); |
| } |
| |
| xfree (arg.error); |
| xfree (entryarg.error); |
| |
| 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 = gdbarch_frame_args_skip (get_frame_arch (frame)); |
| else |
| start = highest_offset; |
| |
| print_frame_nameless_args (frame, start, num - args_printed, |
| first, stream); |
| } |
| |
| do_cleanups (old_chain); |
| } |
| |
| /* Set the current source and line to the location given by frame |
| FRAME, if possible. When CENTER is true, adjust so the relevant |
| line is in the center of the next 'list'. */ |
| |
| void |
| set_current_sal_from_frame (struct frame_info *frame) |
| { |
| struct symtab_and_line sal; |
| |
| find_frame_sal (frame, &sal); |
| if (sal.symtab != NULL) |
| set_current_source_symtab_and_line (&sal); |
| } |
| |
| /* If ON, GDB will display disassembly of the next source line when |
| execution of the program being debugged stops. |
| If AUTO (which is the default), or there's no line info to determine |
| the source line of the next instruction, display disassembly of next |
| instruction instead. */ |
| |
| static enum auto_boolean disassemble_next_line; |
| |
| static void |
| show_disassemble_next_line (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, |
| const char *value) |
| { |
| fprintf_filtered (file, |
| _("Debugger's willingness to use " |
| "disassemble-next-line is %s.\n"), |
| value); |
| } |
| |
| /* Use TRY_CATCH to catch the exception from the gdb_disassembly |
| because it will be broken by filter sometime. */ |
| |
| static void |
| do_gdb_disassembly (struct gdbarch *gdbarch, |
| int how_many, CORE_ADDR low, CORE_ADDR high) |
| { |
| |
| TRY |
| { |
| gdb_disassembly (gdbarch, current_uiout, 0, |
| DISASSEMBLY_RAW_INSN, how_many, |
| low, high); |
| } |
| CATCH (exception, RETURN_MASK_ERROR) |
| { |
| /* If an exception was thrown while doing the disassembly, print |
| the error message, to give the user a clue of what happened. */ |
| exception_print (gdb_stderr, exception); |
| } |
| END_CATCH |
| } |
| |
| /* Print information about frame FRAME. The output is format according |
| to PRINT_LEVEL and PRINT_WHAT and PRINT_ARGS. The meaning of |
| PRINT_WHAT is: |
| |
| SRC_LINE: Print only source line. |
| LOCATION: Print only location. |
| LOC_AND_SRC: Print location and source line. |
| |
| Used in "where" output, and to emit breakpoint or step |
| messages. */ |
| |
| void |
| print_frame_info (struct frame_info *frame, int print_level, |
| enum print_what print_what, int print_args, |
| int set_current_sal) |
| { |
| struct gdbarch *gdbarch = get_frame_arch (frame); |
| struct symtab_and_line sal; |
| int source_print; |
| int location_print; |
| struct ui_out *uiout = current_uiout; |
| |
| if (get_frame_type (frame) == DUMMY_FRAME |
| || get_frame_type (frame) == SIGTRAMP_FRAME |
| || get_frame_type (frame) == ARCH_FRAME) |
| { |
| struct cleanup *uiout_cleanup |
| = make_cleanup_ui_out_tuple_begin_end (uiout, "frame"); |
| |
| annotate_frame_begin (print_level ? frame_relative_level (frame) : 0, |
| gdbarch, get_frame_pc (frame)); |
| |
| /* Do this regardless of SOURCE because we don't have any source |
| to list for this frame. */ |
| if (print_level) |
| { |
| uiout->text ("#"); |
| uiout->field_fmt_int (2, ui_left, "level", |
| frame_relative_level (frame)); |
| } |
| if (uiout->is_mi_like_p ()) |
| { |
| annotate_frame_address (); |
| uiout->field_core_addr ("addr", |
| gdbarch, get_frame_pc (frame)); |
| annotate_frame_address_end (); |
| } |
| |
| if (get_frame_type (frame) == DUMMY_FRAME) |
| { |
| annotate_function_call (); |
| uiout->field_string ("func", "<function called from gdb>"); |
| } |
| else if (get_frame_type (frame) == SIGTRAMP_FRAME) |
| { |
| annotate_signal_handler_caller (); |
| uiout->field_string ("func", "<signal handler called>"); |
| } |
| else if (get_frame_type (frame) == ARCH_FRAME) |
| { |
| uiout->field_string ("func", "<cross-architecture call>"); |
| } |
| uiout->text ("\n"); |
| annotate_frame_end (); |
| |
| /* If disassemble-next-line is set to auto or on output the next |
| instruction. */ |
| if (disassemble_next_line == AUTO_BOOLEAN_AUTO |
| || disassemble_next_line == AUTO_BOOLEAN_TRUE) |
| do_gdb_disassembly (get_frame_arch (frame), 1, |
| get_frame_pc (frame), get_frame_pc (frame) + 1); |
| |
| do_cleanups (uiout_cleanup); |
| return; |
| } |
| |
| /* If FRAME is not the innermost frame, that normally means that |
| FRAME->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 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 FRAME->pc. */ |
| find_frame_sal (frame, &sal); |
| |
| location_print = (print_what == LOCATION |
| || print_what == LOC_AND_ADDRESS |
| || print_what == SRC_AND_LOC); |
| |
| if (location_print || !sal.symtab) |
| print_frame (frame, print_level, print_what, print_args, sal); |
| |
| source_print = (print_what == SRC_LINE || print_what == SRC_AND_LOC); |
| |
| /* If disassemble-next-line is set to auto or on and doesn't have |
| the line debug messages for $pc, output the next instruction. */ |
| if ((disassemble_next_line == AUTO_BOOLEAN_AUTO |
| || disassemble_next_line == AUTO_BOOLEAN_TRUE) |
| && source_print && !sal.symtab) |
| do_gdb_disassembly (get_frame_arch (frame), 1, |
| get_frame_pc (frame), get_frame_pc (frame) + 1); |
| |
| if (source_print && sal.symtab) |
| { |
| int done = 0; |
| int mid_statement = ((print_what == SRC_LINE) |
| && frame_show_address (frame, sal)); |
| |
| if (annotation_level) |
| done = identify_source_line (sal.symtab, sal.line, mid_statement, |
| get_frame_pc (frame)); |
| if (!done) |
| { |
| if (deprecated_print_frame_info_listing_hook) |
| deprecated_print_frame_info_listing_hook (sal.symtab, |
| sal.line, |
| sal.line + 1, 0); |
| else |
| { |
| struct value_print_options opts; |
| |
| get_user_print_options (&opts); |
| /* We used to do this earlier, but that is clearly |
| wrong. This function is used by many different |
| parts of gdb, including normal_stop in infrun.c, |
| which uses this to print out the current PC |
| when we stepi/nexti into the middle of a source |
| line. Only the command line really wants this |
| behavior. Other UIs probably would like the |
| ability to decide for themselves if it is desired. */ |
| if (opts.addressprint && mid_statement) |
| { |
| uiout->field_core_addr ("addr", |
| gdbarch, get_frame_pc (frame)); |
| uiout->text ("\t"); |
| } |
| |
| print_source_lines (sal.symtab, sal.line, sal.line + 1, 0); |
| } |
| } |
| |
| /* If disassemble-next-line is set to on and there is line debug |
| messages, output assembly codes for next line. */ |
| if (disassemble_next_line == AUTO_BOOLEAN_TRUE) |
| do_gdb_disassembly (get_frame_arch (frame), -1, sal.pc, sal.end); |
| } |
| |
| if (set_current_sal) |
| { |
| CORE_ADDR pc; |
| |
| if (get_frame_pc_if_available (frame, &pc)) |
| set_last_displayed_sal (1, sal.pspace, pc, sal.symtab, sal.line); |
| else |
| set_last_displayed_sal (0, 0, 0, 0, 0); |
| } |
| |
| annotate_frame_end (); |
| |
| gdb_flush (gdb_stdout); |
| } |
| |
| /* Remember the last symtab and line we displayed, which we use e.g. |
| * as the place to put a breakpoint when the `break' command is |
| * invoked with no arguments. */ |
| |
| static void |
| set_last_displayed_sal (int valid, struct program_space *pspace, |
| CORE_ADDR addr, struct symtab *symtab, |
| int line) |
| { |
| last_displayed_sal_valid = valid; |
| last_displayed_pspace = pspace; |
| last_displayed_addr = addr; |
| last_displayed_symtab = symtab; |
| last_displayed_line = line; |
| if (valid && pspace == NULL) |
| { |
| clear_last_displayed_sal (); |
| internal_error (__FILE__, __LINE__, |
| _("Trying to set NULL pspace.")); |
| } |
| } |
| |
| /* Forget the last sal we displayed. */ |
| |
| void |
| clear_last_displayed_sal (void) |
| { |
| last_displayed_sal_valid = 0; |
| last_displayed_pspace = 0; |
| last_displayed_addr = 0; |
| last_displayed_symtab = 0; |
| last_displayed_line = 0; |
| } |
| |
| /* Is our record of the last sal we displayed valid? If not, |
| * the get_last_displayed_* functions will return NULL or 0, as |
| * appropriate. */ |
| |
| int |
| last_displayed_sal_is_valid (void) |
| { |
| return last_displayed_sal_valid; |
| } |
| |
| /* Get the pspace of the last sal we displayed, if it's valid. */ |
| |
| struct program_space * |
| get_last_displayed_pspace (void) |
| { |
| if (last_displayed_sal_valid) |
| return last_displayed_pspace; |
| return 0; |
| } |
| |
| /* Get the address of the last sal we displayed, if it's valid. */ |
| |
| CORE_ADDR |
| get_last_displayed_addr (void) |
| { |
| if (last_displayed_sal_valid) |
| return last_displayed_addr; |
| return 0; |
| } |
| |
| /* Get the symtab of the last sal we displayed, if it's valid. */ |
| |
| struct symtab* |
| get_last_displayed_symtab (void) |
| { |
| if (last_displayed_sal_valid) |
| return last_displayed_symtab; |
| return 0; |
| } |
| |
| /* Get the line of the last sal we displayed, if it's valid. */ |
| |
| int |
| get_last_displayed_line (void) |
| { |
| if (last_displayed_sal_valid) |
| return last_displayed_line; |
| return 0; |
| } |
| |
| /* Get the last sal we displayed, if it's valid. */ |
| |
| void |
| get_last_displayed_sal (struct symtab_and_line *sal) |
| { |
| if (last_displayed_sal_valid) |
| { |
| sal->pspace = last_displayed_pspace; |
| sal->pc = last_displayed_addr; |
| sal->symtab = last_displayed_symtab; |
| sal->line = last_displayed_line; |
| } |
| else |
| { |
| sal->pspace = 0; |
| sal->pc = 0; |
| sal->symtab = 0; |
| sal->line = 0; |
| } |
| } |
| |
| |
| /* Attempt to obtain the FUNNAME, FUNLANG and optionally FUNCP of the function |
| corresponding to FRAME. FUNNAME needs to be freed by the caller. */ |
| |
| void |
| find_frame_funname (struct frame_info *frame, char **funname, |
| enum language *funlang, struct symbol **funcp) |
| { |
| struct symbol *func; |
| |
| *funname = NULL; |
| *funlang = language_unknown; |
| if (funcp) |
| *funcp = NULL; |
| |
| func = get_frame_function (frame); |
| if (func) |
| { |
| /* In certain pathological cases, the symtabs give the wrong |
| function (when we are in the first function in a file which |
| is compiled without debugging symbols, the previous function |
| is compiled with debugging symbols, and the "foo.o" symbol |
| that is supposed to tell us where the file with debugging |
| symbols ends has been truncated by ar because it is longer |
| than 15 characters). This also occurs if the user uses asm() |
| to create a function but not stabs for it (in a file compiled |
| with -g). |
| |
| So look in the minimal symbol tables as well, and if it comes |
| up with a larger address for the function use that instead. |
| I don't think this can ever cause any problems; there |
| shouldn't be any minimal symbols in the middle of a function; |
| if this is ever changed many parts of GDB will need to be |
| changed (and we'll create a find_pc_minimal_function or some |
| such). */ |
| |
| struct bound_minimal_symbol msymbol; |
| |
| /* Don't attempt to do this for inlined functions, which do not |
| have a corresponding minimal symbol. */ |
| if (!block_inlined_p (SYMBOL_BLOCK_VALUE (func))) |
| msymbol |
| = lookup_minimal_symbol_by_pc (get_frame_address_in_block (frame)); |
| else |
| memset (&msymbol, 0, sizeof (msymbol)); |
| |
| if (msymbol.minsym != NULL |
| && (BMSYMBOL_VALUE_ADDRESS (msymbol) |
| > BLOCK_START (SYMBOL_BLOCK_VALUE (func)))) |
| { |
| /* We also don't know anything about the function besides |
| its address and name. */ |
| func = 0; |
| *funname = xstrdup (MSYMBOL_PRINT_NAME (msymbol.minsym)); |
| *funlang = MSYMBOL_LANGUAGE (msymbol.minsym); |
| } |
| else |
| { |
| const char *print_name = SYMBOL_PRINT_NAME (func); |
| |
| *funlang = SYMBOL_LANGUAGE (func); |
| if (funcp) |
| *funcp = func; |
| if (*funlang == language_cplus) |
| { |
| /* It seems appropriate 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 remove the parameters. */ |
| char *func_only = cp_remove_params (print_name); |
| |
| if (func_only) |
| *funname = func_only; |
| } |
| |
| /* If we didn't hit the C++ case above, set *funname here. |
| This approach is taken to avoid having to install a |
| cleanup in case cp_remove_params can throw. */ |
| if (*funname == NULL) |
| *funname = xstrdup (print_name); |
| } |
| } |
| else |
| { |
| struct bound_minimal_symbol msymbol; |
| CORE_ADDR pc; |
| |
| if (!get_frame_address_in_block_if_available (frame, &pc)) |
| return; |
| |
| msymbol = lookup_minimal_symbol_by_pc (pc); |
| if (msymbol.minsym != NULL) |
| { |
| *funname = xstrdup (MSYMBOL_PRINT_NAME (msymbol.minsym)); |
| *funlang = MSYMBOL_LANGUAGE (msymbol.minsym); |
| } |
| } |
| } |
| |
| static void |
| print_frame (struct frame_info *frame, int print_level, |
| enum print_what print_what, int print_args, |
| struct symtab_and_line sal) |
| { |
| struct gdbarch *gdbarch = get_frame_arch (frame); |
| struct ui_out *uiout = current_uiout; |
| char *funname = NULL; |
| enum language funlang = language_unknown; |
| struct ui_file *stb; |
| struct cleanup *old_chain, *list_chain; |
| struct value_print_options opts; |
| struct symbol *func; |
| CORE_ADDR pc = 0; |
| int pc_p; |
| |
| pc_p = get_frame_pc_if_available (frame, &pc); |
| |
| stb = mem_fileopen (); |
| old_chain = make_cleanup_ui_file_delete (stb); |
| |
| find_frame_funname (frame, &funname, &funlang, &func); |
| make_cleanup (xfree, funname); |
| |
| annotate_frame_begin (print_level ? frame_relative_level (frame) : 0, |
| gdbarch, pc); |
| |
| list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "frame"); |
| |
| if (print_level) |
| { |
| uiout->text ("#"); |
| uiout->field_fmt_int (2, ui_left, "level", |
| frame_relative_level (frame)); |
| } |
| get_user_print_options (&opts); |
| if (opts.addressprint) |
| if (!sal.symtab |
| || frame_show_address (frame, sal) |
| || print_what == LOC_AND_ADDRESS) |
| { |
| annotate_frame_address (); |
| if (pc_p) |
| uiout->field_core_addr ("addr", gdbarch, pc); |
| else |
| uiout->field_string ("addr", "<unavailable>"); |
| annotate_frame_address_end (); |
| uiout->text (" in "); |
| } |
| annotate_frame_function_name (); |
| fprintf_symbol_filtered (stb, funname ? funname : "??", |
| funlang, DMGL_ANSI); |
| uiout->field_stream ("func", stb); |
| uiout->wrap_hint (" "); |
| annotate_frame_args (); |
| |
| uiout->text (" ("); |
| if (print_args) |
| { |
| struct gdbarch *gdbarch = get_frame_arch (frame); |
| int numargs; |
| struct cleanup *args_list_chain; |
| |
| if (gdbarch_frame_num_args_p (gdbarch)) |
| { |
| numargs = gdbarch_frame_num_args (gdbarch, frame); |
| gdb_assert (numargs >= 0); |
| } |
| else |
| numargs = -1; |
| |
| args_list_chain = make_cleanup_ui_out_list_begin_end (uiout, "args"); |
| TRY |
| { |
| print_frame_args (func, frame, numargs, gdb_stdout); |
| } |
| CATCH (e, RETURN_MASK_ERROR) |
| { |
| } |
| END_CATCH |
| |
| /* FIXME: ARGS must be a list. If one argument is a string it |
| will have " that will not be properly escaped. */ |
| /* Invoke ui_out_tuple_end. */ |
| do_cleanups (args_list_chain); |
| QUIT; |
| } |
| uiout->text (")"); |
| if (sal.symtab) |
| { |
| const char *filename_display; |
| |
| filename_display = symtab_to_filename_for_display (sal.symtab); |
| annotate_frame_source_begin (); |
| uiout->wrap_hint (" "); |
| uiout->text (" at "); |
| annotate_frame_source_file (); |
| uiout->field_string ("file", filename_display); |
| if (uiout->is_mi_like_p ()) |
| { |
| const char *fullname = symtab_to_fullname (sal.symtab); |
| |
| uiout->field_string ("fullname", fullname); |
| } |
| annotate_frame_source_file_end (); |
| uiout->text (":"); |
| annotate_frame_source_line (); |
| uiout->field_int ("line", sal.line); |
| annotate_frame_source_end (); |
| } |
| |
| if (pc_p && (funname == NULL || sal.symtab == NULL)) |
| { |
| char *lib = solib_name_from_address (get_frame_program_space (frame), |
| get_frame_pc (frame)); |
| |
| if (lib) |
| { |
| annotate_frame_where (); |
| uiout->wrap_hint (" "); |
| uiout->text (" from "); |
| uiout->field_string ("from", lib); |
| } |
| } |
| |
| /* do_cleanups will call ui_out_tuple_end() for us. */ |
| do_cleanups (list_chain); |
| uiout->text ("\n"); |
| do_cleanups (old_chain); |
| } |
| |
| |
| /* Read a frame specification in whatever the appropriate format is from |
| FRAME_EXP. Call error() if the specification is in any way invalid (so |
| this function never returns NULL). When SELECTED_FRAME_P is non-NULL |
| set its target to indicate that the default selected frame was used. */ |
| |
| static struct frame_info * |
| parse_frame_specification (const char *frame_exp, int *selected_frame_p) |
| { |
| int numargs; |
| struct value *args[4]; |
| CORE_ADDR addrs[ARRAY_SIZE (args)]; |
| |
| if (frame_exp == NULL) |
| numargs = 0; |
| else |
| { |
| numargs = 0; |
| while (1) |
| { |
| char *addr_string; |
| struct cleanup *cleanup; |
| const char *p; |
| |
| /* Skip leading white space, bail of EOL. */ |
| frame_exp = skip_spaces_const (frame_exp); |
| if (!*frame_exp) |
| break; |
| |
| /* 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); |
| } |
| } |
| |
| /* If no args, default to the selected frame. */ |
| if (numargs == 0) |
| { |
| if (selected_frame_p != NULL) |
| (*selected_frame_p) = 1; |
| return get_selected_frame (_("No stack.")); |
| } |
| |
| /* None of the remaining use the selected frame. */ |
| if (selected_frame_p != NULL) |
| (*selected_frame_p) = 0; |
| |
| /* 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; |
| } |
| |
| /* Convert each value into a corresponding address. */ |
| { |
| int i; |
| |
| for (i = 0; i < numargs; i++) |
| addrs[i] = value_as_address (args[i]); |
| } |
| |
| /* 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 (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))) |
| { |
| struct frame_info *prev_frame; |
| |
| while (1) |
| { |
| prev_frame = get_prev_frame (fid); |
| if (!prev_frame |
| || !frame_id_eq (id, get_frame_id (prev_frame))) |
| break; |
| fid = prev_frame; |
| } |
| return fid; |
| } |
| } |
| } |
| |
| /* 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")); |
| } |
| |
| /* Print verbosely the selected frame or the frame at address |
| ADDR_EXP. Absolutely all information in the frame is printed. */ |
| |
| static void |
| frame_info (char *addr_exp, int from_tty) |
| { |
| struct frame_info *fi; |
| struct symtab_and_line sal; |
| struct symbol *func; |
| struct symtab *s; |
| struct frame_info *calling_frame_info; |
| int numregs; |
| const char *funname = 0; |
| enum language funlang = language_unknown; |
| const char *pc_regname; |
| int selected_frame_p; |
| struct gdbarch *gdbarch; |
| struct cleanup *back_to = make_cleanup (null_cleanup, NULL); |
| CORE_ADDR frame_pc; |
| int frame_pc_p; |
| /* Initialize it to avoid "may be used uninitialized" warning. */ |
| CORE_ADDR caller_pc = 0; |
| int caller_pc_p = 0; |
| |
| fi = parse_frame_specification (addr_exp, &selected_frame_p); |
| gdbarch = get_frame_arch (fi); |
| |
| /* Name of the value returned by get_frame_pc(). Per comments, "pc" |
| is not a good name. */ |
| if (gdbarch_pc_regnum (gdbarch) >= 0) |
| /* OK, this is weird. The gdbarch_pc_regnum hardware register's value can |
| easily not match that of the internal value returned by |
| get_frame_pc(). */ |
| pc_regname = gdbarch_register_name (gdbarch, gdbarch_pc_regnum (gdbarch)); |
| else |
| /* But then, this is weird to. Even without gdbarch_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"; |
| |
| frame_pc_p = get_frame_pc_if_available (fi, &frame_pc); |
| find_frame_sal (fi, &sal); |
| func = get_frame_function (fi); |
| s = sal.symtab; |
| if (func) |
| { |
| funname = SYMBOL_PRINT_NAME (func); |
| funlang = SYMBOL_LANGUAGE (func); |
| if (funlang == language_cplus) |
| { |
| /* It seems appropriate 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 remove the parameters. */ |
| char *func_only = cp_remove_params (funname); |
| |
| if (func_only) |
| { |
| funname = func_only; |
| make_cleanup (xfree, func_only); |
| } |
| } |
| } |
| else if (frame_pc_p) |
| { |
| struct bound_minimal_symbol msymbol; |
| |
| msymbol = lookup_minimal_symbol_by_pc (frame_pc); |
| if (msymbol.minsym != NULL) |
| { |
| funname = MSYMBOL_PRINT_NAME (msymbol.minsym); |
| funlang = MSYMBOL_LANGUAGE (msymbol.minsym); |
| } |
| } |
| calling_frame_info = get_prev_frame (fi); |
| |
| if (selected_frame_p && frame_relative_level (fi) >= 0) |
| { |
| printf_filtered (_("Stack level %d, frame at "), |
| frame_relative_level (fi)); |
| } |
| else |
| { |
| printf_filtered (_("Stack frame at ")); |
| } |
| fputs_filtered (paddress (gdbarch, get_frame_base (fi)), gdb_stdout); |
| printf_filtered (":\n"); |
| printf_filtered (" %s = ", pc_regname); |
| if (frame_pc_p) |
| fputs_filtered (paddress (gdbarch, get_frame_pc (fi)), gdb_stdout); |
| else |
| fputs_filtered ("<unavailable>", gdb_stdout); |
| |
| wrap_here (" "); |
| if (funname) |
| { |
| printf_filtered (" in "); |
| fprintf_symbol_filtered (gdb_stdout, funname, funlang, |
| DMGL_ANSI | DMGL_PARAMS); |
| } |
| wrap_here (" "); |
| if (sal.symtab) |
| printf_filtered (" (%s:%d)", symtab_to_filename_for_display (sal.symtab), |
| sal.line); |
| puts_filtered ("; "); |
| wrap_here (" "); |
| printf_filtered ("saved %s = ", pc_regname); |
| |
| if (!frame_id_p (frame_unwind_caller_id (fi))) |
| val_print_not_saved (gdb_stdout); |
| else |
| { |
| TRY |
| { |
| caller_pc = frame_unwind_caller_pc (fi); |
| caller_pc_p = 1; |
| } |
| CATCH (ex, RETURN_MASK_ERROR) |
| { |
| switch (ex.error) |
| { |
| case NOT_AVAILABLE_ERROR: |
| val_print_unavailable (gdb_stdout); |
| break; |
| case OPTIMIZED_OUT_ERROR: |
| val_print_not_saved (gdb_stdout); |
| break; |
| default: |
| fprintf_filtered (gdb_stdout, _("<error: %s>"), ex.message); |
| break; |
| } |
| } |
| END_CATCH |
| } |
| |
| if (caller_pc_p) |
| fputs_filtered (paddress (gdbarch, caller_pc), gdb_stdout); |
| printf_filtered ("\n"); |
| |
| if (calling_frame_info == NULL) |
| { |
| enum unwind_stop_reason reason; |
| |
| reason = get_frame_unwind_stop_reason (fi); |
| if (reason != UNWIND_NO_REASON) |
| printf_filtered (_(" Outermost frame: %s\n"), |
| frame_stop_reason_string (fi)); |
| } |
| else if (get_frame_type (fi) == TAILCALL_FRAME) |
| puts_filtered (" tail call frame"); |
| else if (get_frame_type (fi) == INLINE_FRAME) |
| printf_filtered (" inlined into frame %d", |
| frame_relative_level (get_prev_frame (fi))); |
| else |
| { |
| printf_filtered (" called by frame at "); |
| fputs_filtered (paddress (gdbarch, get_frame_base (calling_frame_info)), |
| gdb_stdout); |
| } |
| if (get_next_frame (fi) && calling_frame_info) |
| puts_filtered (","); |
| wrap_here (" "); |
| if (get_next_frame (fi)) |
| { |
| printf_filtered (" caller of frame at "); |
| fputs_filtered (paddress (gdbarch, get_frame_base (get_next_frame (fi))), |
| gdb_stdout); |
| } |
| if (get_next_frame (fi) || calling_frame_info) |
| puts_filtered ("\n"); |
| |
| if (s) |
| printf_filtered (" source language %s.\n", |
| language_str (s->language)); |
| |
| { |
| /* Address of the argument list for this frame, or 0. */ |
| CORE_ADDR arg_list = get_frame_args_address (fi); |
| /* Number of args for this frame, or -1 if unknown. */ |
| int numargs; |
| |
| if (arg_list == 0) |
| printf_filtered (" Arglist at unknown address.\n"); |
| else |
| { |
| printf_filtered (" Arglist at "); |
| fputs_filtered (paddress (gdbarch, arg_list), gdb_stdout); |
| printf_filtered (","); |
| |
| if (!gdbarch_frame_num_args_p (gdbarch)) |
| { |
| numargs = -1; |
| puts_filtered (" args: "); |
| } |
| else |
| { |
| numargs = gdbarch_frame_num_args (gdbarch, 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 = get_frame_locals_address (fi); |
| |
| if (arg_list == 0) |
| printf_filtered (" Locals at unknown address,"); |
| else |
| { |
| printf_filtered (" Locals at "); |
| fputs_filtered (paddress (gdbarch, arg_list), gdb_stdout); |
| printf_filtered (","); |
| } |
| } |
| |
| /* Print as much information as possible on the location of all the |
| registers. */ |
| { |
| enum lval_type lval; |
| int optimized; |
| int unavailable; |
| CORE_ADDR addr; |
| int realnum; |
| int count; |
| int i; |
| int need_nl = 1; |
| |
| /* The sp is special; what's displayed isn't the save address, but |
| the value of the previous frame's sp. This is a legacy thing, |
| at one stage the frame cached the previous frame's SP instead |
| of its address, hence it was easiest to just display the cached |
| value. */ |
| if (gdbarch_sp_regnum (gdbarch) >= 0) |
| { |
| /* Find out the location of the saved stack pointer with out |
| actually evaluating it. */ |
| frame_register_unwind (fi, gdbarch_sp_regnum (gdbarch), |
| &optimized, &unavailable, &lval, &addr, |
| &realnum, NULL); |
| if (!optimized && !unavailable && lval == not_lval) |
| { |
| enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| int sp_size = register_size (gdbarch, gdbarch_sp_regnum (gdbarch)); |
| gdb_byte value[MAX_REGISTER_SIZE]; |
| CORE_ADDR sp; |
| |
| frame_register_unwind (fi, gdbarch_sp_regnum (gdbarch), |
| &optimized, &unavailable, &lval, &addr, |
| &realnum, value); |
| /* 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, sp_size, byte_order); |
| printf_filtered (" Previous frame's sp is "); |
| fputs_filtered (paddress (gdbarch, sp), gdb_stdout); |
| printf_filtered ("\n"); |
| need_nl = 0; |
| } |
| else if (!optimized && !unavailable && lval == lval_memory) |
| { |
| printf_filtered (" Previous frame's sp at "); |
| fputs_filtered (paddress (gdbarch, addr), gdb_stdout); |
| printf_filtered ("\n"); |
| need_nl = 0; |
| } |
| else if (!optimized && !unavailable && lval == lval_register) |
| { |
| printf_filtered (" Previous frame's sp in %s\n", |
| gdbarch_register_name (gdbarch, realnum)); |
| need_nl = 0; |
| } |
| /* else keep quiet. */ |
| } |
| |
| count = 0; |
| numregs = gdbarch_num_regs (gdbarch) |
| + gdbarch_num_pseudo_regs (gdbarch); |
| for (i = 0; i < numregs; i++) |
| if (i != gdbarch_sp_regnum (gdbarch) |
| && gdbarch_register_reggroup_p (gdbarch, i, all_reggroup)) |
| { |
| /* Find out the location of the saved register without |
| fetching the corresponding value. */ |
| frame_register_unwind (fi, i, &optimized, &unavailable, |
| &lval, &addr, &realnum, NULL); |
| /* For moment, only display registers that were saved on the |
| stack. */ |
| if (!optimized && !unavailable && lval == lval_memory) |
| { |
| if (count == 0) |
| puts_filtered (" Saved registers:\n "); |
| else |
| puts_filtered (","); |
| wrap_here (" "); |
| printf_filtered (" %s at ", |
| gdbarch_register_name (gdbarch, i)); |
| fputs_filtered (paddress (gdbarch, addr), gdb_stdout); |
| count++; |
| } |
| } |
| if (count || need_nl) |
| puts_filtered ("\n"); |
| } |
| |
| do_cleanups (back_to); |
| } |
| |
| /* Print briefly all stack frames or just the innermost COUNT_EXP |
| frames. */ |
| |
| static void |
| backtrace_command_1 (char *count_exp, int show_locals, int no_filters, |
| int from_tty) |
| { |
| struct frame_info *fi; |
| int count; |
| int i; |
| struct frame_info *trailing; |
| int trailing_level, py_start = 0, py_end = 0; |
| enum ext_lang_bt_status result = EXT_LANG_BT_ERROR; |
| |
| if (!target_has_stack) |
| error (_("No stack.")); |
| |
| /* The following code must do two things. First, it must set the |
| variable TRAILING to the frame from which we should start |
| printing. Second, it must set the variable count to the number |
| of frames which we should print, or -1 if all of them. */ |
| trailing = get_current_frame (); |
| |
| trailing_level = 0; |
| if (count_exp) |
| { |
| count = parse_and_eval_long (count_exp); |
| if (count < 0) |
| { |
| struct frame_info *current; |
| |
| py_start = count; |
| count = -count; |
| |
| current = trailing; |
| while (current && count--) |
| { |
| QUIT; |
| current = get_prev_frame (current); |
| } |
| |
| /* Will stop when CURRENT reaches the top of the stack. |
| TRAILING will be COUNT below it. */ |
| while (current) |
| { |
| QUIT; |
| trailing = get_prev_frame (trailing); |
| current = get_prev_frame (current); |
| trailing_level++; |
| } |
| |
| count = -1; |
| } |
| else |
| { |
| py_start = 0; |
| py_end = count; |
| } |
| } |
| else |
| { |
| py_end = -1; |
| count = -1; |
| } |
| |
| if (info_verbose) |
| { |
| /* Read in symbols for all of the frames. Need to do this in a |
| separate pass so that "Reading in symbols for xxx" messages |
| don't screw up the appearance of the backtrace. Also if |
| people have strong opinions against reading symbols for |
| backtrace this may have to be an option. */ |
| i = count; |
| for (fi = trailing; fi != NULL && i--; fi = get_prev_frame (fi)) |
| { |
| CORE_ADDR pc; |
| |
| QUIT; |
| pc = get_frame_address_in_block (fi); |
| expand_symtab_containing_pc (pc, find_pc_mapped_section (pc)); |
| } |
| } |
| |
| if (! no_filters) |
| { |
| int flags = PRINT_LEVEL | PRINT_FRAME_INFO | PRINT_ARGS; |
| enum ext_lang_frame_args arg_type; |
| |
| if (show_locals) |
| flags |= PRINT_LOCALS; |
| |
| if (!strcmp (print_frame_arguments, "scalars")) |
| arg_type = CLI_SCALAR_VALUES; |
| else if (!strcmp (print_frame_arguments, "all")) |
| arg_type = CLI_ALL_VALUES; |
| else |
| arg_type = NO_VALUES; |
| |
| result = apply_ext_lang_frame_filter (get_current_frame (), flags, |
| arg_type, current_uiout, |
| py_start, py_end); |
| } |
| |
| /* Run the inbuilt backtrace if there are no filters registered, or |
| "no-filters" has been specified from the command. */ |
| if (no_filters || result == EXT_LANG_BT_NO_FILTERS) |
| { |
| for (i = 0, fi = trailing; fi && count--; i++, fi = get_prev_frame (fi)) |
| { |
| QUIT; |
| |
| /* Don't use print_stack_frame; if an error() occurs it probably |
| 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 (fi, 1, LOCATION, 1, 0); |
| if (show_locals) |
| { |
| struct frame_id frame_id = get_frame_id (fi); |
| |
| print_frame_local_vars (fi, 1, gdb_stdout); |
| |
| /* print_frame_local_vars invalidates FI. */ |
| fi = frame_find_by_id (frame_id); |
| if (fi == NULL) |
| { |
| trailing = NULL; |
| warning (_("Unable to restore previously selected frame.")); |
| break; |
| } |
| } |
| |
| /* Save the last frame to check for error conditions. */ |
| trailing = fi; |
| } |
| |
| /* If we've stopped before the end, mention that. */ |
| if (fi && from_tty) |
| printf_filtered (_("(More stack frames follow...)\n")); |
| |
| /* If we've run out of frames, and the reason appears to be an error |
| condition, print it. */ |
| if (fi == NULL && trailing != NULL) |
| { |
| enum unwind_stop_reason reason; |
| |
| reason = get_frame_unwind_stop_reason (trailing); |
| if (reason >= UNWIND_FIRST_ERROR) |
| printf_filtered (_("Backtrace stopped: %s\n"), |
| frame_stop_reason_string (trailing)); |
| } |
| } |
| } |
| |
| static void |
| backtrace_command (char *arg, int from_tty) |
| { |
| struct cleanup *old_chain = make_cleanup (null_cleanup, NULL); |
| int fulltrace_arg = -1, arglen = 0, argc = 0, no_filters = -1; |
| int user_arg = 0; |
| |
| if (arg) |
| { |
| char **argv; |
| int i; |
| |
| argv = gdb_buildargv (arg); |
| make_cleanup_freeargv (argv); |
| argc = 0; |
| for (i = 0; argv[i]; i++) |
| { |
| unsigned int j; |
| |
| for (j = 0; j < strlen (argv[i]); j++) |
| argv[i][j] = TOLOWER (argv[i][j]); |
| |
| if (no_filters < 0 && subset_compare (argv[i], "no-filters")) |
| no_filters = argc; |
| else |
| { |
| if (fulltrace_arg < 0 && subset_compare (argv[i], "full")) |
| fulltrace_arg = argc; |
| else |
| { |
| user_arg++; |
| arglen += strlen (argv[i]); |
| } |
| } |
| argc++; |
| } |
| arglen += user_arg; |
| if (fulltrace_arg >= 0 || no_filters >= 0) |
| { |
| if (arglen > 0) |
| { |
| arg = (char *) xmalloc (arglen + 1); |
| make_cleanup (xfree, arg); |
| arg[0] = 0; |
| for (i = 0; i < argc; i++) |
| { |
| if (i != fulltrace_arg && i != no_filters) |
| { |
| strcat (arg, argv[i]); |
| strcat (arg, " "); |
| } |
| } |
| } |
| else |
| arg = NULL; |
| } |
| } |
| |
| backtrace_command_1 (arg, fulltrace_arg >= 0 /* show_locals */, |
| no_filters >= 0 /* no frame-filters */, from_tty); |
| |
| do_cleanups (old_chain); |
| } |
| |
| /* Iterate over the local variables of a block B, calling CB with |
| CB_DATA. */ |
| |
| static void |
| iterate_over_block_locals (const struct block *b, |
| iterate_over_block_arg_local_vars_cb cb, |
| void *cb_data) |
| { |
| struct block_iterator iter; |
| struct symbol *sym; |
| |
| ALL_BLOCK_SYMBOLS (b, iter, sym) |
| { |
| switch (SYMBOL_CLASS (sym)) |
| { |
| case LOC_LOCAL: |
| case LOC_REGISTER: |
| case LOC_STATIC: |
| case LOC_COMPUTED: |
| if (SYMBOL_IS_ARGUMENT (sym)) |
| break; |
| if (SYMBOL_DOMAIN (sym) == COMMON_BLOCK_DOMAIN) |
| break; |
| (*cb) (SYMBOL_PRINT_NAME (sym), sym, cb_data); |
| break; |
| |
| default: |
| /* Ignore symbols which are not locals. */ |
| break; |
| } |
| } |
| } |
| |
| |
| /* Same, but print labels. */ |
| |
| #if 0 |
| /* Commented out, as the code using this function has also been |
| commented out. FIXME:brobecker/2009-01-13: Find out why the code |
| was commented out in the first place. The discussion introducing |
| this change (2007-12-04: Support lexical blocks and function bodies |
| that occupy non-contiguous address ranges) did not explain why |
| this change was made. */ |
| static int |
| print_block_frame_labels (struct gdbarch *gdbarch, struct block *b, |
| int *have_default, struct ui_file *stream) |
| { |
| struct block_iterator iter; |
| struct symbol *sym; |
| int values_printed = 0; |
| |
| ALL_BLOCK_SYMBOLS (b, iter, sym) |
| { |
| if (strcmp (SYMBOL_LINKAGE_NAME (sym), "default") == 0) |
| { |
| if (*have_default) |
| continue; |
| *have_default = 1; |
| } |
| if (SYMBOL_CLASS (sym) == LOC_LABEL) |
| { |
| struct symtab_and_line sal; |
| struct value_print_options opts; |
| |
| sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0); |
| values_printed = 1; |
| fputs_filtered (SYMBOL_PRINT_NAME (sym), stream); |
| get_user_print_options (&opts); |
| if (opts.addressprint) |
| { |
| fprintf_filtered (stream, " "); |
| fputs_filtered (paddress (gdbarch, SYMBOL_VALUE_ADDRESS (sym)), |
| stream); |
| } |
| fprintf_filtered (stream, " in file %s, line %d\n", |
| sal.symtab->filename, sal.line); |
| } |
| } |
| |
| return values_printed; |
| } |
| #endif |
| |
| /* Iterate over all the local variables in block B, including all its |
| superblocks, stopping when the top-level block is reached. */ |
| |
| void |
| iterate_over_block_local_vars (const struct block *block, |
| iterate_over_block_arg_local_vars_cb cb, |
| void *cb_data) |
| { |
| while (block) |
| { |
| iterate_over_block_locals (block, cb, cb_data); |
| /* After handling the function's top-level block, stop. Don't |
| continue to its superblock, the block of per-file |
| symbols. */ |
| if (BLOCK_FUNCTION (block)) |
| break; |
| block = BLOCK_SUPERBLOCK (block); |
| } |
| } |
| |
| /* Data to be passed around in the calls to the locals and args |
| iterators. */ |
| |
| struct print_variable_and_value_data |
| { |
| struct frame_id frame_id; |
| int num_tabs; |
| struct ui_file *stream; |
| int values_printed; |
| }; |
| |
| /* The callback for the locals and args iterators. */ |
| |
| static void |
| do_print_variable_and_value (const char *print_name, |
| struct symbol *sym, |
| void *cb_data) |
| { |
| struct print_variable_and_value_data *p |
| = (struct print_variable_and_value_data *) cb_data; |
| struct frame_info *frame; |
| |
| frame = frame_find_by_id (p->frame_id); |
| if (frame == NULL) |
| { |
| warning (_("Unable to restore previously selected frame.")); |
| return; |
| } |
| |
| print_variable_and_value (print_name, sym, frame, p->stream, p->num_tabs); |
| |
| /* print_variable_and_value invalidates FRAME. */ |
| frame = NULL; |
| |
| p->values_printed = 1; |
| } |
| |
| /* Print all variables from the innermost up to the function block of FRAME. |
| Print them with values to STREAM indented by NUM_TABS. |
| |
| This function will invalidate FRAME. */ |
| |
| static void |
| print_frame_local_vars (struct frame_info *frame, int num_tabs, |
| struct ui_file *stream) |
| { |
| struct print_variable_and_value_data cb_data; |
| const struct block *block; |
| CORE_ADDR pc; |
| struct gdb_exception except = exception_none; |
| |
| if (!get_frame_pc_if_available (frame, &pc)) |
| { |
| fprintf_filtered (stream, |
| _("PC unavailable, cannot determine locals.\n")); |
| return; |
| } |
| |
| block = get_frame_block (frame, 0); |
| if (block == 0) |
| { |
| fprintf_filtered (stream, "No symbol table info available.\n"); |
| return; |
| } |
| |
| cb_data.frame_id = get_frame_id (frame); |
| cb_data.num_tabs = 4 * num_tabs; |
| cb_data.stream = stream; |
| cb_data.values_printed = 0; |
| |
| /* Temporarily change the selected frame to the given FRAME. |
| This allows routines that rely on the selected frame instead |
| of being given a frame as parameter to use the correct frame. */ |
| select_frame (frame); |
| |
| TRY |
| { |
| iterate_over_block_local_vars (block, |
| do_print_variable_and_value, |
| &cb_data); |
| } |
| CATCH (ex, RETURN_MASK_ALL) |
| { |
| except = ex; |
| } |
| END_CATCH |
| |
| /* Restore the selected frame, and then rethrow if there was a problem. */ |
| select_frame (frame_find_by_id (cb_data.frame_id)); |
| if (except.reason < 0) |
| throw_exception (except); |
| |
| /* do_print_variable_and_value invalidates FRAME. */ |
| frame = NULL; |
| |
| if (!cb_data.values_printed) |
| fprintf_filtered (stream, _("No locals.\n")); |
| } |
| |
| void |
| locals_info (char *args, int from_tty) |
| { |
| print_frame_local_vars (get_selected_frame (_("No frame selected.")), |
| 0, gdb_stdout); |
| } |
| |
| /* Iterate over all the argument variables in block B. |
| |
| Returns 1 if any argument was walked; 0 otherwise. */ |
| |
| void |
| iterate_over_block_arg_vars (const struct block *b, |
| iterate_over_block_arg_local_vars_cb cb, |
| void *cb_data) |
| { |
| struct block_iterator iter; |
| struct symbol *sym, *sym2; |
| |
| ALL_BLOCK_SYMBOLS (b, iter, sym) |
| { |
| /* Don't worry about things which aren't arguments. */ |
| if (SYMBOL_IS_ARGUMENT (sym)) |
| { |
| /* 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). There are also LOC_ARG/LOC_REGISTER pairs which |
| are not combined in symbol-reading. */ |
| |
| sym2 = lookup_symbol (SYMBOL_LINKAGE_NAME (sym), |
| b, VAR_DOMAIN, NULL).symbol; |
| (*cb) (SYMBOL_PRINT_NAME (sym), sym2, cb_data); |
| } |
| } |
| } |
| |
| /* Print all argument variables of the function of FRAME. |
| Print them with values to STREAM. |
| |
| This function will invalidate FRAME. */ |
| |
| static void |
| print_frame_arg_vars (struct frame_info *frame, struct ui_file *stream) |
| { |
| struct print_variable_and_value_data cb_data; |
| struct symbol *func; |
| CORE_ADDR pc; |
| |
| if (!get_frame_pc_if_available (frame, &pc)) |
| { |
| fprintf_filtered (stream, _("PC unavailable, cannot determine args.\n")); |
| return; |
| } |
| |
| func = get_frame_function (frame); |
| if (func == NULL) |
| { |
| fprintf_filtered (stream, _("No symbol table info available.\n")); |
| return; |
| } |
| |
| cb_data.frame_id = get_frame_id (frame); |
| cb_data.num_tabs = 0; |
| cb_data.stream = gdb_stdout; |
| cb_data.values_printed = 0; |
| |
| iterate_over_block_arg_vars (SYMBOL_BLOCK_VALUE (func), |
| do_print_variable_and_value, &cb_data); |
| |
| /* do_print_variable_and_value invalidates FRAME. */ |
| frame = NULL; |
| |
| if (!cb_data.values_printed) |
| fprintf_filtered (stream, _("No arguments.\n")); |
| } |
| |
| void |
| args_info (char *ignore, int from_tty) |
| { |
| print_frame_arg_vars (get_selected_frame (_("No frame selected.")), |
| gdb_stdout); |
| } |
| |
| /* Select frame FRAME. Also print the stack frame and show the source |
| if this is the tui version. */ |
| static void |
| select_and_print_frame (struct frame_info *frame) |
| { |
| select_frame (frame); |
| if (frame) |
| print_stack_frame (frame, 1, SRC_AND_LOC, 1); |
| } |
| |
| /* Return the symbol-block in which the selected frame is executing. |
| Can return zero under various legitimate circumstances. |
| |
| If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant |
| code address within the block returned. We use this to decide |
| which macros are in scope. */ |
| |
| const struct block * |
| get_selected_block (CORE_ADDR *addr_in_block) |
| { |
| if (!has_stack_frames ()) |
| return 0; |
| |
| return get_frame_block (get_selected_frame (NULL), addr_in_block); |
| } |
| |
| /* Find a frame a certain number of levels away from FRAME. |
| LEVEL_OFFSET_PTR points to an int containing the number of levels. |
| Positive means go to earlier frames (up); negative, the reverse. |
| The int that contains the number of levels is counted toward |
| zero as the frames for those levels are found. |
| If the top or bottom frame is reached, that frame is returned, |
| but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates |
| how much farther the original request asked to go. */ |
| |
| struct frame_info * |
| find_relative_frame (struct frame_info *frame, int *level_offset_ptr) |
| { |
| /* Going up is simple: just call get_prev_frame enough times or |
| until the initial frame is reached. */ |
| while (*level_offset_ptr > 0) |
| { |
| struct frame_info *prev = get_prev_frame (frame); |
| |
| if (!prev) |
| break; |
| (*level_offset_ptr)--; |
| frame = prev; |
| } |
| |
| /* Going down is just as simple. */ |
| while (*level_offset_ptr < 0) |
| { |
| struct frame_info *next = get_next_frame (frame); |
| |
| if (!next) |
| break; |
| (*level_offset_ptr)++; |
| frame = next; |
| } |
| |
| return frame; |
| } |
| |
| /* The "select_frame" command. With no argument this is a NOP. |
| Select the frame at level LEVEL_EXP if it is a valid level. |
| Otherwise, treat LEVEL_EXP as an address expression and select it. |
| |
| See parse_frame_specification for more info on proper frame |
| expressions. */ |
| |
| void |
| select_frame_command (char *level_exp, int from_tty) |
| { |
| struct frame_info *prev_frame = get_selected_frame_if_set (); |
| |
| select_frame (parse_frame_specification (level_exp, NULL)); |
| if (get_selected_frame_if_set () != prev_frame) |
| observer_notify_user_selected_context_changed (USER_SELECTED_FRAME); |
| } |
| |
| /* The "frame" command. With no argument, print the selected frame |
| briefly. With an argument, behave like select_frame and then print |
| the selected frame. */ |
| |
| static void |
| frame_command (char *level_exp, int from_tty) |
| { |
| struct frame_info *prev_frame = get_selected_frame_if_set (); |
| |
| select_frame (parse_frame_specification (level_exp, NULL)); |
| if (get_selected_frame_if_set () != prev_frame) |
| observer_notify_user_selected_context_changed (USER_SELECTED_FRAME); |
| else |
| print_selected_thread_frame (current_uiout, USER_SELECTED_FRAME); |
| } |
| |
| /* Select the frame up one or COUNT_EXP stack levels from the |
| previously selected frame, and print it briefly. */ |
| |
| static void |
| up_silently_base (const char *count_exp) |
| { |
| struct frame_info *frame; |
| int count = 1; |
| |
| if (count_exp) |
| count = parse_and_eval_long (count_exp); |
| |
| frame = find_relative_frame (get_selected_frame ("No stack."), &count); |
| if (count != 0 && count_exp == NULL) |
| error (_("Initial frame selected; you cannot go up.")); |
| select_frame (frame); |
| } |
| |
| static void |
| up_silently_command (char *count_exp, int from_tty) |
| { |
| up_silently_base (count_exp); |
| } |
| |
| static void |
| up_command (char *count_exp, int from_tty) |
| { |
| up_silently_base (count_exp); |
| observer_notify_user_selected_context_changed (USER_SELECTED_FRAME); |
| } |
| |
| /* Select the frame down one or COUNT_EXP stack levels from the previously |
| selected frame, and print it briefly. */ |
| |
| static void |
| down_silently_base (const char *count_exp) |
| { |
| struct frame_info *frame; |
| int count = -1; |
| |
| if (count_exp) |
| count = -parse_and_eval_long (count_exp); |
| |
| frame = find_relative_frame (get_selected_frame ("No stack."), &count); |
| if (count != 0 && count_exp == NULL) |
| { |
| /* We only do this if COUNT_EXP is not specified. That way |
| "down" means to really go down (and let me know if that is |
| impossible), but "down 9999" can be used to mean go all the |
| way down without getting an error. */ |
| |
| error (_("Bottom (innermost) frame selected; you cannot go down.")); |
| } |
| |
| select_frame (frame); |
| } |
| |
| static void |
| down_silently_command (char *count_exp, int from_tty) |
| { |
| down_silently_base (count_exp); |
| } |
| |
| static void |
| down_command (char *count_exp, int from_tty) |
| { |
| down_silently_base (count_exp); |
| observer_notify_user_selected_context_changed (USER_SELECTED_FRAME); |
| } |
| |
| void |
| return_command (char *retval_exp, int from_tty) |
| { |
| /* Initialize it just to avoid a GCC false warning. */ |
| enum return_value_convention rv_conv = RETURN_VALUE_STRUCT_CONVENTION; |
| struct frame_info *thisframe; |
| struct gdbarch *gdbarch; |
| struct symbol *thisfun; |
| struct value *return_value = NULL; |
| struct value *function = NULL; |
| const char *query_prefix = ""; |
| |
| thisframe = get_selected_frame ("No selected frame."); |
| thisfun = get_frame_function (thisframe); |
| gdbarch = get_frame_arch (thisframe); |
| |
| if (get_frame_type (get_current_frame ()) == INLINE_FRAME) |
| error (_("Can not force return from an inlined function.")); |
| |
| /* 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) |
| { |
| expression_up retval_expr = parse_expression (retval_exp); |
| struct type *return_type = NULL; |
| |
| /* Compute the return value. Should the computation fail, this |
| call throws an error. */ |
| return_value = evaluate_expression (retval_expr.get ()); |
| |
| /* 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) |
| { |
| if (retval_expr->elts[0].opcode != UNOP_CAST |
| && retval_expr->elts[0].opcode != UNOP_CAST_TYPE) |
| error (_("Return value type not available for selected " |
| "stack frame.\n" |
| "Please use an explicit cast of the value to return.")); |
| return_type = value_type (return_value); |
| } |
| return_type = check_typedef (return_type); |
| return_value = value_cast (return_type, return_value); |
| |
| /* 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 (thisfun != NULL) |
| function = read_var_value (thisfun, NULL, thisframe); |
| |
| rv_conv = RETURN_VALUE_REGISTER_CONVENTION; |
| 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 |
| occur. */ |
| return_value = NULL; |
| else if (thisfun != NULL) |
| { |
| rv_conv = struct_return_convention (gdbarch, function, return_type); |
| if (rv_conv == RETURN_VALUE_STRUCT_CONVENTION |
| || rv_conv == RETURN_VALUE_ABI_RETURNS_ADDRESS) |
| { |
| 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; |
| } |
| } |
| } |
| |
| /* 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 |
| { |
| if (TYPE_NO_RETURN (thisfun->type)) |
| warning (_("Function does not return normally to caller.")); |
| confirmed = query (_("%sMake %s return now? "), query_prefix, |
| SYMBOL_PRINT_NAME (thisfun)); |
| } |
| if (!confirmed) |
| error (_("Not confirmed")); |
| } |
| |
| /* Discard the selected frame and all frames inner-to it. */ |
| frame_pop (get_selected_frame (NULL)); |
| |
| /* Store RETURN_VALUE in the just-returned register set. */ |
| if (return_value != NULL) |
| { |
| struct type *return_type = value_type (return_value); |
| struct gdbarch *gdbarch = get_regcache_arch (get_current_regcache ()); |
| |
| gdb_assert (rv_conv != RETURN_VALUE_STRUCT_CONVENTION |
| && rv_conv != RETURN_VALUE_ABI_RETURNS_ADDRESS); |
| gdbarch_return_value (gdbarch, function, return_type, |
| get_current_regcache (), NULL /*read*/, |
| value_contents (return_value) /*write*/); |
| } |
| |
| /* 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 ()); |
| |
| select_frame (get_current_frame ()); |
| /* If interactive, print the frame that is now current. */ |
| if (from_tty) |
| print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
| } |
| |
| /* Sets the scope to input function name, provided that the function |
| is within the current stack frame. */ |
| |
| struct function_bounds |
| { |
| CORE_ADDR low, high; |
| }; |
| |
| static void |
| func_command (char *arg, int from_tty) |
| { |
| struct frame_info *frame; |
| int found = 0; |
| struct symtabs_and_lines sals; |
| int i; |
| int level = 1; |
| struct function_bounds *func_bounds = NULL; |
| struct cleanup *cleanups; |
| |
| if (arg == NULL) |
| return; |
| |
| frame = get_current_frame (); |
| sals = decode_line_with_current_source (arg, DECODE_LINE_FUNFIRSTLINE); |
| cleanups = make_cleanup (xfree, sals.sals); |
| func_bounds = XNEWVEC (struct function_bounds, sals.nelts); |
| make_cleanup (xfree, func_bounds); |
| for (i = 0; (i < sals.nelts && !found); i++) |
| { |
| if (sals.sals[i].pspace != current_program_space) |
| func_bounds[i].low = func_bounds[i].high = 0; |
| else if (sals.sals[i].pc == 0 |
| || find_pc_partial_function (sals.sals[i].pc, NULL, |
| &func_bounds[i].low, |
| &func_bounds[i].high) == 0) |
| { |
| func_bounds[i].low = func_bounds[i].high = 0; |
| } |
| } |
| |
| do |
| { |
| for (i = 0; (i < sals.nelts && !found); i++) |
| found = (get_frame_pc (frame) >= func_bounds[i].low |
| && get_frame_pc (frame) < func_bounds[i].high); |
| if (!found) |
| { |
| level = 1; |
| frame = find_relative_frame (frame, &level); |
| } |
| } |
| while (!found && level == 0); |
| |
| do_cleanups (cleanups); |
| |
| if (!found) |
| printf_filtered (_("'%s' not within current stack frame.\n"), arg); |
| else if (frame != get_selected_frame (NULL)) |
| select_and_print_frame (frame); |
| } |
| |
| |
| /* Provide a prototype to silence -Wmissing-prototypes. */ |
| void _initialize_stack (void); |
| |
| void |
| _initialize_stack (void) |
| { |
| add_com ("return", class_stack, return_command, _("\ |
| Make selected stack frame return to its caller.\n\ |
| Control remains in the debugger, but when you continue\n\ |
| execution will resume in the frame above the one now selected.\n\ |
| If an argument is given, it is an expression for the value to return.")); |
| |
| add_com ("up", class_stack, up_command, _("\ |
| Select and print stack frame that called this one.\n\ |
| An argument says how many frames up to go.")); |
| add_com ("up-silently", class_support, up_silently_command, _("\ |
| Same as the `up' command, but does not print anything.\n\ |
| This is useful in command scripts.")); |
| |
| add_com ("down", class_stack, down_command, _("\ |
| Select and print stack frame called by this one.\n\ |
| An argument says how many frames down to go.")); |
| add_com_alias ("do", "down", class_stack, 1); |
| add_com_alias ("dow", "down", class_stack, 1); |
| add_com ("down-silently", class_support, down_silently_command, _("\ |
| Same as the `down' command, but does not print anything.\n\ |
| This is useful in command scripts.")); |
| |
| add_com ("frame", class_stack, frame_command, _("\ |
| Select and print a stack frame.\nWith no argument, \ |
| print the selected stack frame. (See also \"info frame\").\n\ |
| An argument specifies the frame to select.\n\ |
| It can be a stack frame number or the address of the frame.\n")); |
| |
| add_com_alias ("f", "frame", class_stack, 1); |
| |
| add_com_suppress_notification ("select-frame", class_stack, select_frame_command, _("\ |
| Select a stack frame without printing anything.\n\ |
| An argument specifies the frame to select.\n\ |
| It can be a stack frame number or the address of the frame.\n"), |
| &cli_suppress_notification.user_selected_context); |
| |
| add_com ("backtrace", class_stack, backtrace_command, _("\ |
| Print backtrace of all stack frames, or innermost COUNT frames.\n\ |
| With a negative argument, print outermost -COUNT frames.\nUse of the \ |
| 'full' qualifier also prints the values of the local variables.\n\ |
| Use of the 'no-filters' qualifier prohibits frame filters from executing\n\ |
| on this backtrace.\n")); |
| add_com_alias ("bt", "backtrace", class_stack, 0); |
| |
| add_com_alias ("where", "backtrace", class_alias, 0); |
| add_info ("stack", backtrace_command, |
| _("Backtrace of the stack, or innermost COUNT frames.")); |
| add_info_alias ("s", "stack", 1); |
| add_info ("frame", frame_info, |
| _("All about selected stack frame, or frame at ADDR.")); |
| add_info_alias ("f", "frame", 1); |
| add_info ("locals", locals_info, |
| _("Local variables of current stack frame.")); |
| add_info ("args", args_info, |
| _("Argument variables of current stack frame.")); |
| |
| if (dbx_commands) |
| add_com ("func", class_stack, func_command, _("\ |
| Select the stack frame that contains <func>.\n\ |
| Usage: func <name>\n")); |
| |
| add_setshow_enum_cmd ("frame-arguments", class_stack, |
| print_frame_arguments_choices, &print_frame_arguments, |
| _("Set printing of non-scalar frame arguments"), |
| _("Show printing of non-scalar frame arguments"), |
| NULL, NULL, NULL, &setprintlist, &showprintlist); |
| |
| add_setshow_boolean_cmd ("frame-arguments", no_class, |
| &print_raw_frame_arguments, _("\ |
| Set whether to print frame arguments in raw form."), _("\ |
| Show whether to print frame arguments in raw form."), _("\ |
| If set, frame arguments are printed in raw form, bypassing any\n\ |
| pretty-printers for that value."), |
| NULL, NULL, |
| &setprintrawlist, &showprintrawlist); |
| |
| add_setshow_auto_boolean_cmd ("disassemble-next-line", class_stack, |
| &disassemble_next_line, _("\ |
| Set whether to disassemble next source line or insn when execution stops."), |
| _("\ |
| Show whether to disassemble next source line or insn when execution stops."), |
| _("\ |
| If ON, GDB will display disassembly of the next source line, in addition\n\ |
| to displaying the source line itself. If the next source line cannot\n\ |
| be displayed (e.g., source is unavailable or there's no line info), GDB\n\ |
| will display disassembly of next instruction instead of showing the\n\ |
| source line.\n\ |
| If AUTO, display disassembly of next instruction only if the source line\n\ |
| cannot be displayed.\n\ |
| If OFF (which is the default), never display the disassembly of the next\n\ |
| source line."), |
| NULL, |
| show_disassemble_next_line, |
| &setlist, &showlist); |
| disassemble_next_line = AUTO_BOOLEAN_FALSE; |
| |
| add_setshow_enum_cmd ("entry-values", class_stack, |
| print_entry_values_choices, &print_entry_values, |
| _("Set printing of function arguments at function " |
| "entry"), |
| _("Show printing of function arguments at function " |
| "entry"), |
| _("\ |
| GDB can sometimes determine the values of function arguments at entry,\n\ |
| in addition to their current values. This option tells GDB whether\n\ |
| to print the current value, the value at entry (marked as val@entry),\n\ |
| or both. Note that one or both of these values may be <optimized out>."), |
| NULL, NULL, &setprintlist, &showprintlist); |
| } |