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binutils-gdb/gdb/symmisc.c
Pedro Alves b5ec771e60 Introduce lookup_name_info and generalize Ada's FULL/WILD name matching 
Summary:
 - This is preparation for supporting wild name matching on C++ too.
 - This is also preparation for TAB-completion fixes.
 - Makes symbol name matching (think strcmp_iw) be based on a per-language method.
 - Merges completion and non-completion name comparison (think
   language_ops::la_get_symbol_name_cmp generalized).
 - Avoid re-hashing lookup name multiple times
 - Centralizes preparing a name for lookup (Ada name encoding / C++ Demangling),
   both completion and non-completion.
 - Fixes Ada latent bug with verbatim name matches in expressions
 - Makes ada-lang.c use common|symtab.c completion code a bit more.

Ada's wild matching basically means that

 "(gdb) break foo"

will find all methods named "foo" in all packages.  Translating to
C++, it's roughly the same as saying that "break klass::method" sets
breakpoints on all "klass::method" methods of all classes, no matter
the namespace.  A following patch will teach GDB about fullname vs
wild matching for C++ too.  This patch is preparatory work to get
there.

Another idea here is to do symbol name matching based on the symbol
language's algorithm.  I.e., avoid dependency on current language set.

This allows for example doing

  (gdb) b foo::bar< int > (<tab>

and having gdb name match the C++ symbols correctly even if the
current language is C or Assembly (or Rust, or Ada, or ...), which can
easily happen if you step into an Assembly/C runtime library frame.

By encapsulating all the information related to a lookup name in a
class, we can also cache hash computation for a given language in the
lookup name object, to avoid recomputing it over and over.

Similarly, because we don't really know upfront which languages the
lookup name will be matched against, for each language we store the
lookup name transformed into a search name.  E.g., for C++, that means
demangling the name.  But for Ada, it means encoding the name.  This
actually forces us to centralize all the different lookup name
encoding in a central place, resulting in clearer code, IMO.  See
e.g., the new ada_lookup_name_info class.

The lookup name -> symbol search name computation is also done only
once per language.

The old language->la_get_symbol_name_cmp / symbol_name_cmp_ftype are
generalized to work with both completion, and normal symbol look up.

At some point early on, I had separate completion vs non-completion
language vector entry points, but a single method ends up being better
IMO for simplifying things -- the more we merge the completion /
non-completion name lookup code paths, the less changes for bugs
causing completion vs normal lookup finding different symbols.

The ada-lex.l change is necessary because when doing

  (gdb) p <UpperCase>

then the name that is passed to write_ write_var_or_type ->
ada_lookup_symbol_list misses the "<>", i.e., it's just "UpperCase",
and we end up doing a wild match against "UpperCase" lowercased by
ada_lookup_name_info's constructor.  I.e., "uppercase" wouldn't ever
match "UpperCase", and the symbol lookup fails.

This wouldn't cause any regression in the testsuite, but I added a new
test that would pass before the patch and fail after, if it weren't
for that fix.

This is latent bug that happens to go unnoticed because that
particular path was inconsistent with the rest of Ada symbol lookup by
not lowercasing the lookup name.

Ada's symbol_completion_add is deleted, replaced by using common
code's completion_list_add_name.  To make the latter work for Ada, we
needed to add a new output parameter, because Ada wants to return back
a custom completion candidates that are not the symbol name.

With this patch, minimal symbol demangled name hashing is made
consistent with regular symbol hashing.  I.e., it now goes via the
language vector's search_name_hash method too, as I had suggested in a
previous patch.

dw2_expand_symtabs_matching / .gdb_index symbol names were a
challenge.  The problem is that we have no way to telling what is the
language of each symbol name found in the index, until we expand the
corresponding full symbol, which is off course what we're trying to
avoid.  Language information is simply not considered in the index
format...  Since the symbol name hashing and comparison routines are
per-language, we now have a problem.  The patch sorts this out by
matching each name against all languages.  This is inneficient, and
indeed slows down completion several times.  E.g., with:

 $ cat script.cmd
 set pagination off
 set $count = 0
 while $count < 400
   complete b string_prin
   printf "count = %d\n", $count
   set $count = $count + 1
 end

 $ time gdb --batch -q ./gdb-with-index -ex "source script-string_printf.cmd"

I get, before patch (-O2, x86-64):

 real    0m1.773s
 user    0m1.737s
 sys     0m0.040s

While after patch (-O2, x86-64):

 real    0m9.843s
 user    0m9.482s
 sys     0m0.034s

However, the following patch will optimize this, and will actually
make this use case faster compared to the "before patch" above:

 real    0m1.321s
 user    0m1.285s
 sys     0m0.039s

gdb/ChangeLog:
2017-11-08   Pedro Alves  <palves@redhat.com>

	* ada-lang.c (ada_encode): Rename to ..
	(ada_encode_1): ... this.  Add throw_errors parameter and handle
	it.
	(ada_encode): Reimplement.
	(match_name): Delete, folded into full_name.
	(resolve_subexp): No longer pass the encoded name to
	ada_lookup_symbol_list.
	(should_use_wild_match): Delete.
	(name_match_type_from_name): New.
	(ada_lookup_simple_minsym): Use lookup_name_info and the
	language's symbol_name_matcher_ftype.
	(add_symbols_from_enclosing_procs, ada_add_local_symbols)
	(ada_add_block_renamings): Adjust to use lookup_name_info.
	(ada_lookup_name): New.
	(add_nonlocal_symbols, ada_add_all_symbols)
	(ada_lookup_symbol_list_worker, ada_lookup_symbol_list)
	(ada_iterate_over_symbols): Adjust to use lookup_name_info.
	(ada_name_for_lookup): Delete.
	(ada_lookup_encoded_symbol): Construct a verbatim name.
	(wild_match): Reverse sense of return type.  Use bool.
	(full_match): Reverse sense of return type.  Inline bits of old
	match_name here.
	(ada_add_block_symbols): Adjust to use lookup_name_info.
	(symbol_completion_match): Delete, folded into...
	(ada_lookup_name_info::matches): ... .this new method.
	(symbol_completion_add): Delete.
	(ada_collect_symbol_completion_matches): Add name_match_type
	parameter.  Adjust to use lookup_name_info and
	completion_list_add_name.
	(get_var_value, ada_add_global_exceptions): Adjust to use
	lookup_name_info.
	(ada_get_symbol_name_cmp): Delete.
	(do_wild_match, do_full_match): New functions.
	(ada_lookup_name_info::ada_lookup_name_info): New method.
	(ada_symbol_name_matches, ada_get_symbol_name_matcher): New
	functions.
	(ada_language_defn): Install ada_get_symbol_name_matcher.
	* ada-lex.l (processId): If name starts with '<', copy it
	verbatim.
	* block.c (block_iter_match_step, block_iter_match_first)
	(block_iter_match_next, block_lookup_symbol)
	(block_lookup_symbol_primary, block_find_symbol): Adjust to use
	lookup_name_info.
	* block.h (block_iter_match_first, block_iter_match_next)
	(ALL_BLOCK_SYMBOLS_WITH_NAME): Adjust to use lookup_name_info.
	* c-lang.c (c_language_defn, cplus_language_defn)
	(asm_language_defn, minimal_language_defn): Adjust comments to
	refer to la_get_symbol_name_matcher.
	* completer.c (complete_files_symbols)
	(collect_explicit_location_matches, symbol_completer): Pass a
	symbol_name_match_type down.
	* completer.h (class completion_match, completion_match_result):
	New classes.
	(completion_tracker::reset_completion_match_result): New method.
	(completion_tracker::m_completion_match_result): New field.
	* cp-support.c (make_symbol_overload_list_block): Adjust to use
	lookup_name_info.
	(cp_fq_symbol_name_matches, cp_get_symbol_name_matcher): New
	functions.
	* cp-support.h (cp_get_symbol_name_matcher): New declaration.
	* d-lang.c: Adjust comments to refer to
	la_get_symbol_name_matcher.
	* dictionary.c (dict_vector) <iter_match_first, iter_match_next>:
	Adjust to use lookup_name_info.
	(dict_iter_match_first, dict_iter_match_next)
	(iter_match_first_hashed, iter_match_next_hashed)
	(iter_match_first_linear, iter_match_next_linear): Adjust to work
	with a lookup_name_info.
	* dictionary.h (dict_iter_match_first, dict_iter_match_next):
	Likewise.
	* dwarf2read.c (dw2_lookup_symbol): Adjust to use lookup_name_info.
	(dw2_map_matching_symbols): Adjust to use symbol_name_match_type.
	(gdb_index_symbol_name_matcher): New class.
	(dw2_expand_symtabs_matching) Adjust to use lookup_name_info and
	gdb_index_symbol_name_matcher.  Accept a NULL symbol_matcher.
	* f-lang.c (f_collect_symbol_completion_matches): Adjust to work
	with a symbol_name_match_type.
	(f_language_defn): Adjust comments to refer to
	la_get_symbol_name_matcher.
	* go-lang.c (go_language_defn): Adjust comments to refer to
	la_get_symbol_name_matcher.
	* language.c (default_symbol_name_matcher)
	(language_get_symbol_name_matcher): New functions.
	(unknown_language_defn, auto_language_defn): Adjust comments to
	refer to la_get_symbol_name_matcher.
	* language.h (symbol_name_cmp_ftype): Delete.
	(language_defn) <la_collect_symbol_completion_matches>: Add match
	type parameter.
	<la_get_symbol_name_cmp>: Delete field.
	<la_get_symbol_name_matcher>: New field.
	<la_iterate_over_symbols>: Adjust to use lookup_name_info.
	(default_symbol_name_matcher, language_get_symbol_name_matcher):
	Declare.
	* linespec.c (iterate_over_all_matching_symtabs)
	(iterate_over_file_blocks): Adjust to use lookup_name_info.
	(find_methods): Add language parameter, and use lookup_name_info
	and the language's symbol_name_matcher_ftype.
	(linespec_complete_function): Adjust.
	(lookup_prefix_sym): Use lookup_name_info.
	(add_all_symbol_names_from_pspace): Adjust.
	(find_superclass_methods): Add language parameter and pass it
	down.
	(find_method): Pass symbol language down.
	(find_linespec_symbols): Don't demangle or Ada encode here.
	(search_minsyms_for_name): Add lookup_name_info parameter.
	(add_matching_symbols_to_info): Add name_match_type parameter.
	Use lookup_name_info.
	* m2-lang.c (m2_language_defn): Adjust comments to refer to
	la_get_symbol_name_matcher.
	* minsyms.c: Include <algorithm>.
	(add_minsym_to_demangled_hash_table): Remove table parameter and
	add objfile parameter.  Use search_name_hash, and add language to
	demangled languages vector.
	(struct found_minimal_symbols): New struct.
	(lookup_minimal_symbol_mangled, lookup_minimal_symbol_demangled):
	New functions.
	(lookup_minimal_symbol): Adjust to use them.  Don't canonicalize
	input names here.  Use lookup_name_info instead.  Lookup up
	demangled names once for each language in the demangled names
	vector.
	(iterate_over_minimal_symbols): Use lookup_name_info.  Lookup up
	demangled names once for each language in the demangled names
	vector.
	(build_minimal_symbol_hash_tables): Adjust.
	* minsyms.h (iterate_over_minimal_symbols): Adjust to pass down a
	lookup_name_info.
	* objc-lang.c (objc_language_defn): Adjust comment to refer to
	la_get_symbol_name_matcher.
	* objfiles.h: Include <vector>.
	(objfile_per_bfd_storage) <demangled_hash_languages>: New field.
	* opencl-lang.c (opencl_language_defn): Adjust comment to refer to
	la_get_symbol_name_matcher.
	* p-lang.c (pascal_language_defn): Adjust comment to refer to
	la_get_symbol_name_matcher.
	* psymtab.c (psym_lookup_symbol): Use lookup_name_info.
	(match_partial_symbol): Use symbol_name_match_type,
	lookup_name_info and psymbol_name_matches.
	(lookup_partial_symbol): Use lookup_name_info.
	(map_block): Use symbol_name_match_type and lookup_name_info.
	(psym_map_matching_symbols): Use symbol_name_match_type.
	(psymbol_name_matches): New.
	(recursively_search_psymtabs): Use lookup_name_info and
	psymbol_name_matches.  Rename 'kind' parameter to 'domain'.
	(psym_expand_symtabs_matching): Use lookup_name_info.  Rename
	'kind' parameter to 'domain'.
	* rust-lang.c (rust_language_defn): Adjust comment to refer to
	la_get_symbol_name_matcher.
	* symfile-debug.c (debug_qf_map_matching_symbols)
	(debug_qf_map_matching_symbols): Use symbol_name_match_type.
	(debug_qf_expand_symtabs_matching): Use lookup_name_info.
	* symfile.c (expand_symtabs_matching): Use lookup_name_info.
	* symfile.h (quick_symbol_functions) <map_matching_symbols>:
	Adjust to use symbol_name_match_type.
	<expand_symtabs_matching>: Adjust to use lookup_name_info.
	(expand_symtabs_matching): Adjust to use lookup_name_info.
	* symmisc.c (maintenance_expand_symtabs): Use
	lookup_name_info::match_any ().
	* symtab.c (symbol_matches_search_name): New.
	(eq_symbol_entry): Adjust to use lookup_name_info and the
	language's matcher.
	(demangle_for_lookup_info::demangle_for_lookup_info): New.
	(lookup_name_info::match_any): New.
	(iterate_over_symbols, search_symbols): Use lookup_name_info.
	(compare_symbol_name): Add language, lookup_name_info and
	completion_match_result parameters, and use them.
	(completion_list_add_name): Make extern.  Add language and
	lookup_name_info parameters.  Use them.
	(completion_list_add_symbol, completion_list_add_msymbol)
	(completion_list_objc_symbol): Add lookup_name_info parameters and
	adjust.  Pass down language.
	(completion_list_add_fields): Add lookup_name_info parameters and
	adjust.  Pass down language.
	(add_symtab_completions): Add lookup_name_info parameters and
	adjust.
	(default_collect_symbol_completion_matches_break_on): Add
	name_match_type parameter, and use it.  Use lookup_name_info.
	(default_collect_symbol_completion_matches)
	(collect_symbol_completion_matches): Add name_match_type
	parameter, and pass it down.
	(collect_symbol_completion_matches_type): Adjust.
	(collect_file_symbol_completion_matches): Add name_match_type
	parameter, and use lookup_name_info.
	* symtab.h: Include <string> and "common/gdb_optional.h".
	(enum class symbol_name_match_type): New.
	(class ada_lookup_name_info): New.
	(struct demangle_for_lookup_info): New.
	(class lookup_name_info): New.
	(symbol_name_matcher_ftype): New.
	(SYMBOL_MATCHES_SEARCH_NAME): Use symbol_matches_search_name.
	(symbol_matches_search_name): Declare.
	(MSYMBOL_MATCHES_SEARCH_NAME): Delete.
	(default_collect_symbol_completion_matches)
	(collect_symbol_completion_matches)
	(collect_file_symbol_completion_matches): Add name_match_type
	parameter.
	(iterate_over_symbols): Use lookup_name_info.
	(completion_list_add_name): Declare.
	* utils.c (enum class strncmp_iw_mode): Moved to utils.h.
	(strncmp_iw_with_mode): Now extern.
	* utils.h (enum class strncmp_iw_mode): Moved from utils.c.
	(strncmp_iw_with_mode): Declare.

gdb/testsuite/ChangeLog:
2017-11-08   Pedro Alves  <palves@redhat.com>

	* gdb.ada/complete.exp (p <Exported_Capitalized>): New test.
	(p Exported_Capitalized): New test.
	(p exported_capitalized): New test.
2017-11-08 16:02:24 +00:00

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/* Do various things to symbol tables (other than lookup), for GDB.
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 "symtab.h"
#include "gdbtypes.h"
#include "bfd.h"
#include "filenames.h"
#include "symfile.h"
#include "objfiles.h"
#include "breakpoint.h"
#include "command.h"
#include "gdb_obstack.h"
#include "language.h"
#include "bcache.h"
#include "block.h"
#include "gdb_regex.h"
#include <sys/stat.h>
#include "dictionary.h"
#include "typeprint.h"
#include "gdbcmd.h"
#include "source.h"
#include "readline/readline.h"
#include "psymtab.h"
/* Unfortunately for debugging, stderr is usually a macro. This is painful
when calling functions that take FILE *'s from the debugger.
So we make a variable which has the same value and which is accessible when
debugging GDB with itself. Because stdin et al need not be constants,
we initialize them in the _initialize_symmisc function at the bottom
of the file. */
FILE *std_in;
FILE *std_out;
FILE *std_err;
/* Prototypes for local functions */
static int block_depth (struct block *);
static void print_symbol (struct gdbarch *gdbarch, struct symbol *symbol,
int depth, ui_file *outfile);
void
print_symbol_bcache_statistics (void)
{
struct program_space *pspace;
struct objfile *objfile;
ALL_PSPACES (pspace)
ALL_PSPACE_OBJFILES (pspace, objfile)
{
QUIT;
printf_filtered (_("Byte cache statistics for '%s':\n"),
objfile_name (objfile));
print_bcache_statistics (psymbol_bcache_get_bcache (objfile->psymbol_cache),
"partial symbol cache");
print_bcache_statistics (objfile->per_bfd->macro_cache,
"preprocessor macro cache");
print_bcache_statistics (objfile->per_bfd->filename_cache,
"file name cache");
}
}
void
print_objfile_statistics (void)
{
struct program_space *pspace;
struct objfile *objfile;
struct compunit_symtab *cu;
struct symtab *s;
int i, linetables, blockvectors;
ALL_PSPACES (pspace)
ALL_PSPACE_OBJFILES (pspace, objfile)
{
QUIT;
printf_filtered (_("Statistics for '%s':\n"), objfile_name (objfile));
if (OBJSTAT (objfile, n_stabs) > 0)
printf_filtered (_(" Number of \"stab\" symbols read: %d\n"),
OBJSTAT (objfile, n_stabs));
if (objfile->per_bfd->n_minsyms > 0)
printf_filtered (_(" Number of \"minimal\" symbols read: %d\n"),
objfile->per_bfd->n_minsyms);
if (OBJSTAT (objfile, n_psyms) > 0)
printf_filtered (_(" Number of \"partial\" symbols read: %d\n"),
OBJSTAT (objfile, n_psyms));
if (OBJSTAT (objfile, n_syms) > 0)
printf_filtered (_(" Number of \"full\" symbols read: %d\n"),
OBJSTAT (objfile, n_syms));
if (OBJSTAT (objfile, n_types) > 0)
printf_filtered (_(" Number of \"types\" defined: %d\n"),
OBJSTAT (objfile, n_types));
if (objfile->sf)
objfile->sf->qf->print_stats (objfile);
i = linetables = blockvectors = 0;
ALL_OBJFILE_FILETABS (objfile, cu, s)
{
i++;
if (SYMTAB_LINETABLE (s) != NULL)
linetables++;
}
ALL_OBJFILE_COMPUNITS (objfile, cu)
blockvectors++;
printf_filtered (_(" Number of symbol tables: %d\n"), i);
printf_filtered (_(" Number of symbol tables with line tables: %d\n"),
linetables);
printf_filtered (_(" Number of symbol tables with blockvectors: %d\n"),
blockvectors);
if (OBJSTAT (objfile, sz_strtab) > 0)
printf_filtered (_(" Space used by string tables: %d\n"),
OBJSTAT (objfile, sz_strtab));
printf_filtered (_(" Total memory used for objfile obstack: %s\n"),
pulongest (obstack_memory_used (&objfile
->objfile_obstack)));
printf_filtered (_(" Total memory used for BFD obstack: %s\n"),
pulongest (obstack_memory_used (&objfile->per_bfd
->storage_obstack)));
printf_filtered (_(" Total memory used for psymbol cache: %d\n"),
bcache_memory_used (psymbol_bcache_get_bcache
(objfile->psymbol_cache)));
printf_filtered (_(" Total memory used for macro cache: %d\n"),
bcache_memory_used (objfile->per_bfd->macro_cache));
printf_filtered (_(" Total memory used for file name cache: %d\n"),
bcache_memory_used (objfile->per_bfd->filename_cache));
}
}
static void
dump_objfile (struct objfile *objfile)
{
struct compunit_symtab *cust;
struct symtab *symtab;
printf_filtered ("\nObject file %s: ", objfile_name (objfile));
printf_filtered ("Objfile at ");
gdb_print_host_address (objfile, gdb_stdout);
printf_filtered (", bfd at ");
gdb_print_host_address (objfile->obfd, gdb_stdout);
printf_filtered (", %d minsyms\n\n",
objfile->per_bfd->minimal_symbol_count);
if (objfile->sf)
objfile->sf->qf->dump (objfile);
if (objfile->compunit_symtabs != NULL)
{
printf_filtered ("Symtabs:\n");
ALL_OBJFILE_FILETABS (objfile, cust, symtab)
{
printf_filtered ("%s at ", symtab_to_filename_for_display (symtab));
gdb_print_host_address (symtab, gdb_stdout);
printf_filtered (", ");
if (SYMTAB_OBJFILE (symtab) != objfile)
{
printf_filtered ("NOT ON CHAIN! ");
}
wrap_here (" ");
}
printf_filtered ("\n\n");
}
}
/* Print minimal symbols from this objfile. */
static void
dump_msymbols (struct objfile *objfile, struct ui_file *outfile)
{
struct gdbarch *gdbarch = get_objfile_arch (objfile);
struct minimal_symbol *msymbol;
int index;
char ms_type;
fprintf_filtered (outfile, "\nObject file %s:\n\n", objfile_name (objfile));
if (objfile->per_bfd->minimal_symbol_count == 0)
{
fprintf_filtered (outfile, "No minimal symbols found.\n");
return;
}
index = 0;
ALL_OBJFILE_MSYMBOLS (objfile, msymbol)
{
struct obj_section *section = MSYMBOL_OBJ_SECTION (objfile, msymbol);
switch (MSYMBOL_TYPE (msymbol))
{
case mst_unknown:
ms_type = 'u';
break;
case mst_text:
ms_type = 'T';
break;
case mst_text_gnu_ifunc:
ms_type = 'i';
break;
case mst_solib_trampoline:
ms_type = 'S';
break;
case mst_data:
ms_type = 'D';
break;
case mst_bss:
ms_type = 'B';
break;
case mst_abs:
ms_type = 'A';
break;
case mst_file_text:
ms_type = 't';
break;
case mst_file_data:
ms_type = 'd';
break;
case mst_file_bss:
ms_type = 'b';
break;
default:
ms_type = '?';
break;
}
fprintf_filtered (outfile, "[%2d] %c ", index, ms_type);
fputs_filtered (paddress (gdbarch, MSYMBOL_VALUE_ADDRESS (objfile,
msymbol)),
outfile);
fprintf_filtered (outfile, " %s", MSYMBOL_LINKAGE_NAME (msymbol));
if (section)
{
if (section->the_bfd_section != NULL)
fprintf_filtered (outfile, " section %s",
bfd_section_name (objfile->obfd,
section->the_bfd_section));
else
fprintf_filtered (outfile, " spurious section %ld",
(long) (section - objfile->sections));
}
if (MSYMBOL_DEMANGLED_NAME (msymbol) != NULL)
{
fprintf_filtered (outfile, " %s", MSYMBOL_DEMANGLED_NAME (msymbol));
}
if (msymbol->filename)
fprintf_filtered (outfile, " %s", msymbol->filename);
fputs_filtered ("\n", outfile);
index++;
}
if (objfile->per_bfd->minimal_symbol_count != index)
{
warning (_("internal error: minimal symbol count %d != %d"),
objfile->per_bfd->minimal_symbol_count, index);
}
fprintf_filtered (outfile, "\n");
}
static void
dump_symtab_1 (struct symtab *symtab, struct ui_file *outfile)
{
struct objfile *objfile = SYMTAB_OBJFILE (symtab);
struct gdbarch *gdbarch = get_objfile_arch (objfile);
int i;
struct dict_iterator iter;
int len;
struct linetable *l;
const struct blockvector *bv;
struct symbol *sym;
struct block *b;
int depth;
fprintf_filtered (outfile, "\nSymtab for file %s\n",
symtab_to_filename_for_display (symtab));
if (SYMTAB_DIRNAME (symtab) != NULL)
fprintf_filtered (outfile, "Compilation directory is %s\n",
SYMTAB_DIRNAME (symtab));
fprintf_filtered (outfile, "Read from object file %s (",
objfile_name (objfile));
gdb_print_host_address (objfile, outfile);
fprintf_filtered (outfile, ")\n");
fprintf_filtered (outfile, "Language: %s\n",
language_str (symtab->language));
/* First print the line table. */
l = SYMTAB_LINETABLE (symtab);
if (l)
{
fprintf_filtered (outfile, "\nLine table:\n\n");
len = l->nitems;
for (i = 0; i < len; i++)
{
fprintf_filtered (outfile, " line %d at ", l->item[i].line);
fputs_filtered (paddress (gdbarch, l->item[i].pc), outfile);
fprintf_filtered (outfile, "\n");
}
}
/* Now print the block info, but only for compunit symtabs since we will
print lots of duplicate info otherwise. */
if (symtab == COMPUNIT_FILETABS (SYMTAB_COMPUNIT (symtab)))
{
fprintf_filtered (outfile, "\nBlockvector:\n\n");
bv = SYMTAB_BLOCKVECTOR (symtab);
len = BLOCKVECTOR_NBLOCKS (bv);
for (i = 0; i < len; i++)
{
b = BLOCKVECTOR_BLOCK (bv, i);
depth = block_depth (b) * 2;
print_spaces (depth, outfile);
fprintf_filtered (outfile, "block #%03d, object at ", i);
gdb_print_host_address (b, outfile);
if (BLOCK_SUPERBLOCK (b))
{
fprintf_filtered (outfile, " under ");
gdb_print_host_address (BLOCK_SUPERBLOCK (b), outfile);
}
/* drow/2002-07-10: We could save the total symbols count
even if we're using a hashtable, but nothing else but this message
wants it. */
fprintf_filtered (outfile, ", %d syms/buckets in ",
dict_size (BLOCK_DICT (b)));
fputs_filtered (paddress (gdbarch, BLOCK_START (b)), outfile);
fprintf_filtered (outfile, "..");
fputs_filtered (paddress (gdbarch, BLOCK_END (b)), outfile);
if (BLOCK_FUNCTION (b))
{
fprintf_filtered (outfile, ", function %s",
SYMBOL_LINKAGE_NAME (BLOCK_FUNCTION (b)));
if (SYMBOL_DEMANGLED_NAME (BLOCK_FUNCTION (b)) != NULL)
{
fprintf_filtered (outfile, ", %s",
SYMBOL_DEMANGLED_NAME (BLOCK_FUNCTION (b)));
}
}
fprintf_filtered (outfile, "\n");
/* Now print each symbol in this block (in no particular order, if
we're using a hashtable). Note that we only want this
block, not any blocks from included symtabs. */
ALL_DICT_SYMBOLS (BLOCK_DICT (b), iter, sym)
{
TRY
{
print_symbol (gdbarch, sym, depth + 1, outfile);
}
CATCH (ex, RETURN_MASK_ERROR)
{
exception_fprintf (gdb_stderr, ex,
"Error printing symbol:\n");
}
END_CATCH
}
}
fprintf_filtered (outfile, "\n");
}
else
{
const char *compunit_filename
= symtab_to_filename_for_display (COMPUNIT_FILETABS (SYMTAB_COMPUNIT (symtab)));
fprintf_filtered (outfile,
"\nBlockvector same as owning compunit: %s\n\n",
compunit_filename);
}
}
static void
dump_symtab (struct symtab *symtab, struct ui_file *outfile)
{
/* Set the current language to the language of the symtab we're dumping
because certain routines used during dump_symtab() use the current
language to print an image of the symbol. We'll restore it later.
But use only real languages, not placeholders. */
if (symtab->language != language_unknown
&& symtab->language != language_auto)
{
enum language saved_lang;
saved_lang = set_language (symtab->language);
dump_symtab_1 (symtab, outfile);
set_language (saved_lang);
}
else
dump_symtab_1 (symtab, outfile);
}
static void
maintenance_print_symbols (const char *args, int from_tty)
{
struct ui_file *outfile = gdb_stdout;
char *address_arg = NULL, *source_arg = NULL, *objfile_arg = NULL;
int i, outfile_idx;
dont_repeat ();
gdb_argv argv (args);
for (i = 0; argv != NULL && argv[i] != NULL; ++i)
{
if (strcmp (argv[i], "-pc") == 0)
{
if (argv[i + 1] == NULL)
error (_("Missing pc value"));
address_arg = argv[++i];
}
else if (strcmp (argv[i], "-source") == 0)
{
if (argv[i + 1] == NULL)
error (_("Missing source file"));
source_arg = argv[++i];
}
else if (strcmp (argv[i], "-objfile") == 0)
{
if (argv[i + 1] == NULL)
error (_("Missing objfile name"));
objfile_arg = argv[++i];
}
else if (strcmp (argv[i], "--") == 0)
{
/* End of options. */
++i;
break;
}
else if (argv[i][0] == '-')
{
/* Future proofing: Don't allow OUTFILE to begin with "-". */
error (_("Unknown option: %s"), argv[i]);
}
else
break;
}
outfile_idx = i;
if (address_arg != NULL && source_arg != NULL)
error (_("Must specify at most one of -pc and -source"));
stdio_file arg_outfile;
if (argv != NULL && argv[outfile_idx] != NULL)
{
if (argv[outfile_idx + 1] != NULL)
error (_("Junk at end of command"));
gdb::unique_xmalloc_ptr<char> outfile_name
(tilde_expand (argv[outfile_idx]));
if (!arg_outfile.open (outfile_name.get (), FOPEN_WT))
perror_with_name (outfile_name.get ());
outfile = &arg_outfile;
}
if (address_arg != NULL)
{
CORE_ADDR pc = parse_and_eval_address (address_arg);
struct symtab *s = find_pc_line_symtab (pc);
if (s == NULL)
error (_("No symtab for address: %s"), address_arg);
dump_symtab (s, outfile);
}
else
{
struct objfile *objfile;
struct compunit_symtab *cu;
struct symtab *s;
int found = 0;
ALL_OBJFILES (objfile)
{
int print_for_objfile = 1;
if (objfile_arg != NULL)
print_for_objfile
= compare_filenames_for_search (objfile_name (objfile),
objfile_arg);
if (!print_for_objfile)
continue;
ALL_OBJFILE_FILETABS (objfile, cu, s)
{
int print_for_source = 0;
QUIT;
if (source_arg != NULL)
{
print_for_source
= compare_filenames_for_search
(symtab_to_filename_for_display (s), source_arg);
found = 1;
}
if (source_arg == NULL
|| print_for_source)
dump_symtab (s, outfile);
}
}
if (source_arg != NULL && !found)
error (_("No symtab for source file: %s"), source_arg);
}
}
/* Print symbol SYMBOL on OUTFILE. DEPTH says how far to indent. */
static void
print_symbol (struct gdbarch *gdbarch, struct symbol *symbol,
int depth, ui_file *outfile)
{
struct obj_section *section;
if (SYMBOL_OBJFILE_OWNED (symbol))
section = SYMBOL_OBJ_SECTION (symbol_objfile (symbol), symbol);
else
section = NULL;
print_spaces (depth, outfile);
if (SYMBOL_DOMAIN (symbol) == LABEL_DOMAIN)
{
fprintf_filtered (outfile, "label %s at ", SYMBOL_PRINT_NAME (symbol));
fputs_filtered (paddress (gdbarch, SYMBOL_VALUE_ADDRESS (symbol)),
outfile);
if (section)
fprintf_filtered (outfile, " section %s\n",
bfd_section_name (section->the_bfd_section->owner,
section->the_bfd_section));
else
fprintf_filtered (outfile, "\n");
return;
}
if (SYMBOL_DOMAIN (symbol) == STRUCT_DOMAIN)
{
if (TYPE_TAG_NAME (SYMBOL_TYPE (symbol)))
{
LA_PRINT_TYPE (SYMBOL_TYPE (symbol), "", outfile, 1, depth,
&type_print_raw_options);
}
else
{
fprintf_filtered (outfile, "%s %s = ",
(TYPE_CODE (SYMBOL_TYPE (symbol)) == TYPE_CODE_ENUM
? "enum"
: (TYPE_CODE (SYMBOL_TYPE (symbol)) == TYPE_CODE_STRUCT
? "struct" : "union")),
SYMBOL_LINKAGE_NAME (symbol));
LA_PRINT_TYPE (SYMBOL_TYPE (symbol), "", outfile, 1, depth,
&type_print_raw_options);
}
fprintf_filtered (outfile, ";\n");
}
else
{
if (SYMBOL_CLASS (symbol) == LOC_TYPEDEF)
fprintf_filtered (outfile, "typedef ");
if (SYMBOL_TYPE (symbol))
{
/* Print details of types, except for enums where it's clutter. */
LA_PRINT_TYPE (SYMBOL_TYPE (symbol), SYMBOL_PRINT_NAME (symbol),
outfile,
TYPE_CODE (SYMBOL_TYPE (symbol)) != TYPE_CODE_ENUM,
depth,
&type_print_raw_options);
fprintf_filtered (outfile, "; ");
}
else
fprintf_filtered (outfile, "%s ", SYMBOL_PRINT_NAME (symbol));
switch (SYMBOL_CLASS (symbol))
{
case LOC_CONST:
fprintf_filtered (outfile, "const %s (%s)",
plongest (SYMBOL_VALUE (symbol)),
hex_string (SYMBOL_VALUE (symbol)));
break;
case LOC_CONST_BYTES:
{
unsigned i;
struct type *type = check_typedef (SYMBOL_TYPE (symbol));
fprintf_filtered (outfile, "const %u hex bytes:",
TYPE_LENGTH (type));
for (i = 0; i < TYPE_LENGTH (type); i++)
fprintf_filtered (outfile, " %02x",
(unsigned) SYMBOL_VALUE_BYTES (symbol)[i]);
}
break;
case LOC_STATIC:
fprintf_filtered (outfile, "static at ");
fputs_filtered (paddress (gdbarch, SYMBOL_VALUE_ADDRESS (symbol)),
outfile);
if (section)
fprintf_filtered (outfile, " section %s",
bfd_section_name (section->the_bfd_section->owner,
section->the_bfd_section));
break;
case LOC_REGISTER:
if (SYMBOL_IS_ARGUMENT (symbol))
fprintf_filtered (outfile, "parameter register %s",
plongest (SYMBOL_VALUE (symbol)));
else
fprintf_filtered (outfile, "register %s",
plongest (SYMBOL_VALUE (symbol)));
break;
case LOC_ARG:
fprintf_filtered (outfile, "arg at offset %s",
hex_string (SYMBOL_VALUE (symbol)));
break;
case LOC_REF_ARG:
fprintf_filtered (outfile, "reference arg at %s",
hex_string (SYMBOL_VALUE (symbol)));
break;
case LOC_REGPARM_ADDR:
fprintf_filtered (outfile, "address parameter register %s",
plongest (SYMBOL_VALUE (symbol)));
break;
case LOC_LOCAL:
fprintf_filtered (outfile, "local at offset %s",
hex_string (SYMBOL_VALUE (symbol)));
break;
case LOC_TYPEDEF:
break;
case LOC_LABEL:
fprintf_filtered (outfile, "label at ");
fputs_filtered (paddress (gdbarch, SYMBOL_VALUE_ADDRESS (symbol)),
outfile);
if (section)
fprintf_filtered (outfile, " section %s",
bfd_section_name (section->the_bfd_section->owner,
section->the_bfd_section));
break;
case LOC_BLOCK:
fprintf_filtered (outfile, "block object ");
gdb_print_host_address (SYMBOL_BLOCK_VALUE (symbol), outfile);
fprintf_filtered (outfile, ", ");
fputs_filtered (paddress (gdbarch,
BLOCK_START (SYMBOL_BLOCK_VALUE (symbol))),
outfile);
fprintf_filtered (outfile, "..");
fputs_filtered (paddress (gdbarch,
BLOCK_END (SYMBOL_BLOCK_VALUE (symbol))),
outfile);
if (section)
fprintf_filtered (outfile, " section %s",
bfd_section_name (section->the_bfd_section->owner,
section->the_bfd_section));
break;
case LOC_COMPUTED:
fprintf_filtered (outfile, "computed at runtime");
break;
case LOC_UNRESOLVED:
fprintf_filtered (outfile, "unresolved");
break;
case LOC_OPTIMIZED_OUT:
fprintf_filtered (outfile, "optimized out");
break;
default:
fprintf_filtered (outfile, "botched symbol class %x",
SYMBOL_CLASS (symbol));
break;
}
}
fprintf_filtered (outfile, "\n");
}
static void
maintenance_print_msymbols (const char *args, int from_tty)
{
struct ui_file *outfile = gdb_stdout;
char *objfile_arg = NULL;
struct objfile *objfile;
int i, outfile_idx;
dont_repeat ();
gdb_argv argv (args);
for (i = 0; argv != NULL && argv[i] != NULL; ++i)
{
if (strcmp (argv[i], "-objfile") == 0)
{
if (argv[i + 1] == NULL)
error (_("Missing objfile name"));
objfile_arg = argv[++i];
}
else if (strcmp (argv[i], "--") == 0)
{
/* End of options. */
++i;
break;
}
else if (argv[i][0] == '-')
{
/* Future proofing: Don't allow OUTFILE to begin with "-". */
error (_("Unknown option: %s"), argv[i]);
}
else
break;
}
outfile_idx = i;
stdio_file arg_outfile;
if (argv != NULL && argv[outfile_idx] != NULL)
{
if (argv[outfile_idx + 1] != NULL)
error (_("Junk at end of command"));
gdb::unique_xmalloc_ptr<char> outfile_name
(tilde_expand (argv[outfile_idx]));
if (!arg_outfile.open (outfile_name.get (), FOPEN_WT))
perror_with_name (outfile_name.get ());
outfile = &arg_outfile;
}
ALL_OBJFILES (objfile)
{
QUIT;
if (objfile_arg == NULL
|| compare_filenames_for_search (objfile_name (objfile), objfile_arg))
dump_msymbols (objfile, outfile);
}
}
static void
maintenance_print_objfiles (const char *regexp, int from_tty)
{
struct program_space *pspace;
struct objfile *objfile;
dont_repeat ();
if (regexp)
re_comp (regexp);
ALL_PSPACES (pspace)
ALL_PSPACE_OBJFILES (pspace, objfile)
{
QUIT;
if (! regexp
|| re_exec (objfile_name (objfile)))
dump_objfile (objfile);
}
}
/* List all the symbol tables whose names match REGEXP (optional). */
static void
maintenance_info_symtabs (const char *regexp, int from_tty)
{
struct program_space *pspace;
struct objfile *objfile;
dont_repeat ();
if (regexp)
re_comp (regexp);
ALL_PSPACES (pspace)
ALL_PSPACE_OBJFILES (pspace, objfile)
{
struct compunit_symtab *cust;
struct symtab *symtab;
/* We don't want to print anything for this objfile until we
actually find a symtab whose name matches. */
int printed_objfile_start = 0;
ALL_OBJFILE_COMPUNITS (objfile, cust)
{
int printed_compunit_symtab_start = 0;
ALL_COMPUNIT_FILETABS (cust, symtab)
{
QUIT;
if (! regexp
|| re_exec (symtab_to_filename_for_display (symtab)))
{
if (! printed_objfile_start)
{
printf_filtered ("{ objfile %s ", objfile_name (objfile));
wrap_here (" ");
printf_filtered ("((struct objfile *) %s)\n",
host_address_to_string (objfile));
printed_objfile_start = 1;
}
if (! printed_compunit_symtab_start)
{
printf_filtered (" { ((struct compunit_symtab *) %s)\n",
host_address_to_string (cust));
printf_filtered (" debugformat %s\n",
COMPUNIT_DEBUGFORMAT (cust));
printf_filtered (" producer %s\n",
COMPUNIT_PRODUCER (cust) != NULL
? COMPUNIT_PRODUCER (cust)
: "(null)");
printf_filtered (" dirname %s\n",
COMPUNIT_DIRNAME (cust) != NULL
? COMPUNIT_DIRNAME (cust)
: "(null)");
printf_filtered (" blockvector"
" ((struct blockvector *) %s)\n",
host_address_to_string
(COMPUNIT_BLOCKVECTOR (cust)));
printed_compunit_symtab_start = 1;
}
printf_filtered ("\t{ symtab %s ",
symtab_to_filename_for_display (symtab));
wrap_here (" ");
printf_filtered ("((struct symtab *) %s)\n",
host_address_to_string (symtab));
printf_filtered ("\t fullname %s\n",
symtab->fullname != NULL
? symtab->fullname
: "(null)");
printf_filtered ("\t "
"linetable ((struct linetable *) %s)\n",
host_address_to_string (symtab->linetable));
printf_filtered ("\t}\n");
}
}
if (printed_compunit_symtab_start)
printf_filtered (" }\n");
}
if (printed_objfile_start)
printf_filtered ("}\n");
}
}
/* Check consistency of symtabs.
An example of what this checks for is NULL blockvectors.
They can happen if there's a bug during debug info reading.
GDB assumes they are always non-NULL.
Note: This does not check for psymtab vs symtab consistency.
Use "maint check-psymtabs" for that. */
static void
maintenance_check_symtabs (const char *ignore, int from_tty)
{
struct program_space *pspace;
struct objfile *objfile;
ALL_PSPACES (pspace)
ALL_PSPACE_OBJFILES (pspace, objfile)
{
struct compunit_symtab *cust;
/* We don't want to print anything for this objfile until we
actually find something worth printing. */
int printed_objfile_start = 0;
ALL_OBJFILE_COMPUNITS (objfile, cust)
{
int found_something = 0;
struct symtab *symtab = compunit_primary_filetab (cust);
QUIT;
if (COMPUNIT_BLOCKVECTOR (cust) == NULL)
found_something = 1;
/* Add more checks here. */
if (found_something)
{
if (! printed_objfile_start)
{
printf_filtered ("{ objfile %s ", objfile_name (objfile));
wrap_here (" ");
printf_filtered ("((struct objfile *) %s)\n",
host_address_to_string (objfile));
printed_objfile_start = 1;
}
printf_filtered (" { symtab %s\n",
symtab_to_filename_for_display (symtab));
if (COMPUNIT_BLOCKVECTOR (cust) == NULL)
printf_filtered (" NULL blockvector\n");
printf_filtered (" }\n");
}
}
if (printed_objfile_start)
printf_filtered ("}\n");
}
}
/* Expand all symbol tables whose name matches an optional regexp. */
static void
maintenance_expand_symtabs (const char *args, int from_tty)
{
struct program_space *pspace;
struct objfile *objfile;
char *regexp = NULL;
/* We use buildargv here so that we handle spaces in the regexp
in a way that allows adding more arguments later. */
gdb_argv argv (args);
if (argv != NULL)
{
if (argv[0] != NULL)
{
regexp = argv[0];
if (argv[1] != NULL)
error (_("Extra arguments after regexp."));
}
}
if (regexp)
re_comp (regexp);
ALL_PSPACES (pspace)
ALL_PSPACE_OBJFILES (pspace, objfile)
{
if (objfile->sf)
{
objfile->sf->qf->expand_symtabs_matching
(objfile,
[&] (const char *filename, bool basenames)
{
/* KISS: Only apply the regexp to the complete file name. */
return (!basenames
&& (regexp == NULL || re_exec (filename)));
},
lookup_name_info::match_any (),
[] (const char *symname)
{
/* Since we're not searching on symbols, just return true. */
return true;
},
NULL,
ALL_DOMAIN);
}
}
}
/* Return the nexting depth of a block within other blocks in its symtab. */
static int
block_depth (struct block *block)
{
int i = 0;
while ((block = BLOCK_SUPERBLOCK (block)) != NULL)
{
i++;
}
return i;
}
/* Used by MAINTENANCE_INFO_LINE_TABLES to print the information about a
single line table. */
static int
maintenance_print_one_line_table (struct symtab *symtab, void *data)
{
struct linetable *linetable;
struct objfile *objfile;
objfile = symtab->compunit_symtab->objfile;
printf_filtered (_("objfile: %s ((struct objfile *) %s)\n"),
objfile_name (objfile),
host_address_to_string (objfile));
printf_filtered (_("compunit_symtab: ((struct compunit_symtab *) %s)\n"),
host_address_to_string (symtab->compunit_symtab));
printf_filtered (_("symtab: %s ((struct symtab *) %s)\n"),
symtab_to_fullname (symtab),
host_address_to_string (symtab));
linetable = SYMTAB_LINETABLE (symtab);
printf_filtered (_("linetable: ((struct linetable *) %s):\n"),
host_address_to_string (linetable));
if (linetable == NULL)
printf_filtered (_("No line table.\n"));
else if (linetable->nitems <= 0)
printf_filtered (_("Line table has no lines.\n"));
else
{
int i;
/* Leave space for 6 digits of index and line number. After that the
tables will just not format as well. */
printf_filtered (_("%-6s %6s %s\n"),
_("INDEX"), _("LINE"), _("ADDRESS"));
for (i = 0; i < linetable->nitems; ++i)
{
struct linetable_entry *item;
item = &linetable->item [i];
printf_filtered (_("%-6d %6d %s\n"), i, item->line,
core_addr_to_string (item->pc));
}
}
return 0;
}
/* Implement the 'maint info line-table' command. */
static void
maintenance_info_line_tables (const char *regexp, int from_tty)
{
struct program_space *pspace;
struct objfile *objfile;
dont_repeat ();
if (regexp != NULL)
re_comp (regexp);
ALL_PSPACES (pspace)
ALL_PSPACE_OBJFILES (pspace, objfile)
{
struct compunit_symtab *cust;
struct symtab *symtab;
ALL_OBJFILE_COMPUNITS (objfile, cust)
{
ALL_COMPUNIT_FILETABS (cust, symtab)
{
QUIT;
if (regexp == NULL
|| re_exec (symtab_to_filename_for_display (symtab)))
maintenance_print_one_line_table (symtab, NULL);
}
}
}
}
/* Do early runtime initializations. */
void
_initialize_symmisc (void)
{
std_in = stdin;
std_out = stdout;
std_err = stderr;
add_cmd ("symbols", class_maintenance, maintenance_print_symbols, _("\
Print dump of current symbol definitions.\n\
Usage: mt print symbols [-pc address] [--] [outfile]\n\
mt print symbols [-objfile objfile] [-source source] [--] [outfile]\n\
Entries in the full symbol table are dumped to file OUTFILE,\n\
or the terminal if OUTFILE is unspecified.\n\
If ADDRESS is provided, dump only the file for that address.\n\
If SOURCE is provided, dump only that file's symbols.\n\
If OBJFILE is provided, dump only that file's minimal symbols."),
&maintenanceprintlist);
add_cmd ("msymbols", class_maintenance, maintenance_print_msymbols, _("\
Print dump of current minimal symbol definitions.\n\
Usage: mt print msymbols [-objfile objfile] [--] [outfile]\n\
Entries in the minimal symbol table are dumped to file OUTFILE,\n\
or the terminal if OUTFILE is unspecified.\n\
If OBJFILE is provided, dump only that file's minimal symbols."),
&maintenanceprintlist);
add_cmd ("objfiles", class_maintenance, maintenance_print_objfiles,
_("Print dump of current object file definitions.\n\
With an argument REGEXP, list the object files with matching names."),
&maintenanceprintlist);
add_cmd ("symtabs", class_maintenance, maintenance_info_symtabs, _("\
List the full symbol tables for all object files.\n\
This does not include information about individual symbols, blocks, or\n\
linetables --- just the symbol table structures themselves.\n\
With an argument REGEXP, list the symbol tables with matching names."),
&maintenanceinfolist);
add_cmd ("line-table", class_maintenance, maintenance_info_line_tables, _("\
List the contents of all line tables, from all symbol tables.\n\
With an argument REGEXP, list just the line tables for the symbol\n\
tables with matching names."),
&maintenanceinfolist);
add_cmd ("check-symtabs", class_maintenance, maintenance_check_symtabs,
_("\
Check consistency of currently expanded symtabs."),
&maintenancelist);
add_cmd ("expand-symtabs", class_maintenance, maintenance_expand_symtabs,
_("Expand symbol tables.\n\
With an argument REGEXP, only expand the symbol tables with matching names."),
&maintenancelist);
}
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