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1ab9eefe3c
I noticed that "info locals" on a certain large Ada program was very
slow. I tracked this down to ada_get_tsd_type expanding nearly every
CU in the program.
This patch fixes the problem by changing this code to use the more
efficient lookup_transparent_type which, unlike the Ada-specific
lookup functions, does not try to find all matching instances.
Note that I first tried fixing this by changing ada_find_any_type, but
this did not work -- I may revisit this approach at some later date.
Also note that the copyright dates on the test files are set that way
because I copied them from another test.
New in v2: the new test failed on the Linaro regression tester.
Looking at the logs, it seems that gdb was picking up a 'value' from
libgnat:
$1 = {<text variable, no debug info>} 0xf7e227a4 <ada.calendar.formatting.value>
This version renames the local variable in an attempt to work around
this.
v3: In v2, while trying to reproduce the problem locally, I
accidentally forgot to commit one of the changes.
216 lines
6.9 KiB
C++
216 lines
6.9 KiB
C++
/* Helper routines for C++ support in GDB.
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Copyright (C) 2002-2024 Free Software Foundation, Inc.
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Contributed by MontaVista Software.
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Namespace support contributed by David Carlton.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef CP_SUPPORT_H
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#define CP_SUPPORT_H
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#include "symtab.h"
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#include "gdbsupport/gdb_vecs.h"
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#include "gdbsupport/gdb_obstack.h"
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#include "gdbsupport/array-view.h"
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#include <vector>
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/* Opaque declarations. */
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struct symbol;
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struct block;
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struct buildsym_compunit;
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struct objfile;
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struct type;
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struct demangle_component;
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struct using_direct;
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/* A string representing the name of the anonymous namespace used in GDB. */
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#define CP_ANONYMOUS_NAMESPACE_STR "(anonymous namespace)"
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/* The length of the string representing the anonymous namespace. */
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#define CP_ANONYMOUS_NAMESPACE_LEN 21
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/* A string representing the start of an operator name. */
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#define CP_OPERATOR_STR "operator"
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/* The length of CP_OPERATOR_STR. */
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#define CP_OPERATOR_LEN 8
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/* The result of parsing a name. */
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struct demangle_parse_info
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{
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demangle_parse_info ();
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~demangle_parse_info ();
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/* The memory used during the parse. */
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struct demangle_info *info;
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/* The result of the parse. */
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struct demangle_component *tree;
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/* Any temporary memory used during typedef replacement. */
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struct obstack obstack;
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};
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/* Functions from cp-support.c. */
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extern gdb::unique_xmalloc_ptr<char> cp_canonicalize_string
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(const char *string);
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extern gdb::unique_xmalloc_ptr<char> cp_canonicalize_string_no_typedefs
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(const char *string);
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typedef const char *(canonicalization_ftype) (struct type *, void *);
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extern gdb::unique_xmalloc_ptr<char> cp_canonicalize_string_full
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(const char *string, canonicalization_ftype *finder, void *data);
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extern char *cp_class_name_from_physname (const char *physname);
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extern char *method_name_from_physname (const char *physname);
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extern unsigned int cp_find_first_component (const char *name);
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extern unsigned int cp_entire_prefix_len (const char *name);
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extern gdb::unique_xmalloc_ptr<char> cp_func_name (const char *full_name);
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extern gdb::unique_xmalloc_ptr<char> cp_remove_params
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(const char *demangled_name);
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/* DEMANGLED_NAME is the name of a function, (optionally) including
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parameters and (optionally) a return type. Return the name of the
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function without parameters or return type, or NULL if we can not
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parse the name. If COMPLETION_MODE is true, then tolerate a
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non-existing or unbalanced parameter list. */
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extern gdb::unique_xmalloc_ptr<char> cp_remove_params_if_any
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(const char *demangled_name, bool completion_mode);
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extern std::vector<symbol *> make_symbol_overload_list (const char *,
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const char *);
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extern void add_symbol_overload_list_adl
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(gdb::array_view<type *> arg_types,
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const char *func_name,
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std::vector<symbol *> *overload_list);
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extern struct type *cp_lookup_rtti_type (const char *name,
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const struct block *block);
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/* Produce an unsigned hash value from SEARCH_NAME that is compatible
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with cp_symbol_name_matches. Only the last component in
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"foo::bar::function()" is considered for hashing purposes (i.e.,
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the entire prefix is skipped), so that later on looking up for
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"function" or "bar::function" in all namespaces is possible. */
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extern unsigned int cp_search_name_hash (const char *search_name);
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/* Implement the "get_symbol_name_matcher" language_defn method for C++. */
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extern symbol_name_matcher_ftype *cp_get_symbol_name_matcher
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(const lookup_name_info &lookup_name);
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/* Functions/variables from cp-namespace.c. */
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extern int cp_is_in_anonymous (const char *symbol_name);
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extern void cp_scan_for_anonymous_namespaces (struct buildsym_compunit *,
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const struct symbol *symbol,
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struct objfile *objfile);
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extern struct block_symbol cp_lookup_symbol_nonlocal
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(const struct language_defn *langdef,
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const char *name,
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const struct block *block,
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const domain_search_flags domain);
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extern struct block_symbol
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cp_lookup_symbol_namespace (const char *the_namespace,
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const char *name,
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const struct block *block,
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const domain_search_flags domain);
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extern struct block_symbol cp_lookup_symbol_imports_or_template
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(const char *scope,
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const char *name,
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const struct block *block,
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const domain_search_flags domain);
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extern struct block_symbol
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cp_lookup_nested_symbol (struct type *parent_type,
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const char *nested_name,
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const struct block *block,
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const domain_search_flags domain);
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struct type *cp_lookup_transparent_type (const char *name,
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domain_search_flags flags);
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/* See description in cp-namespace.c. */
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struct type *cp_find_type_baseclass_by_name (struct type *parent_type,
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const char *name);
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/* Functions from cp-name-parser.y. */
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extern std::unique_ptr<demangle_parse_info> cp_demangled_name_to_comp
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(const char *demangled_name, std::string *errmsg);
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/* Convert RESULT to a string. ESTIMATED_LEN is used only as a guide
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to the length of the result. */
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extern gdb::unique_xmalloc_ptr<char> cp_comp_to_string
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(struct demangle_component *result, int estimated_len);
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extern void cp_merge_demangle_parse_infos (struct demangle_parse_info *,
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struct demangle_component *,
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struct demangle_parse_info *);
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/* The list of "maint cplus" commands. */
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extern struct cmd_list_element *maint_cplus_cmd_list;
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/* Wrappers for bfd and libiberty demangling entry points. Note they
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all force DMGL_VERBOSE so that callers don't need to. This is so
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that GDB consistently uses DMGL_VERBOSE throughout -- we want
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libiberty's demangler to expand standard substitutions to their
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full template name. */
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/* A wrapper for bfd_demangle. */
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gdb::unique_xmalloc_ptr<char> gdb_demangle (const char *name, int options);
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/* A wrapper for cplus_demangle_print. */
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extern char *gdb_cplus_demangle_print (int options,
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struct demangle_component *tree,
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int estimated_length,
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size_t *p_allocated_size);
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/* Find an instance of the character C in the string S that is outside
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of all parenthesis pairs, single-quoted strings, and double-quoted
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strings. Also, ignore the char within a template name, like a ','
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within foo<int, int>. */
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extern const char *find_toplevel_char (const char *s, char c);
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#endif /* CP_SUPPORT_H */
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