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- /* Support for GDB maintenance commands.
- Copyright (C) 1992-2022 Free Software Foundation, Inc.
- Written by Fred Fish at Cygnus Support.
- 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 "arch-utils.h"
- #include <ctype.h>
- #include <cmath>
- #include <signal.h>
- #include "command.h"
- #include "gdbcmd.h"
- #include "symtab.h"
- #include "block.h"
- #include "gdbtypes.h"
- #include "demangle.h"
- #include "gdbcore.h"
- #include "expression.h" /* For language.h */
- #include "language.h"
- #include "symfile.h"
- #include "objfiles.h"
- #include "value.h"
- #include "top.h"
- #include "maint.h"
- #include "gdbsupport/selftest.h"
- #include "inferior.h"
- #include "cli/cli-decode.h"
- #include "cli/cli-utils.h"
- #include "cli/cli-setshow.h"
- #include "cli/cli-cmds.h"
- #if CXX_STD_THREAD
- #include "gdbsupport/thread-pool.h"
- #endif
- static void maintenance_do_deprecate (const char *, int);
- #ifndef _WIN32
- static void
- maintenance_dump_me (const char *args, int from_tty)
- {
- if (query (_("Should GDB dump core? ")))
- {
- #ifdef __DJGPP__
- /* SIGQUIT by default is ignored, so use SIGABRT instead. */
- signal (SIGABRT, SIG_DFL);
- kill (getpid (), SIGABRT);
- #else
- signal (SIGQUIT, SIG_DFL);
- kill (getpid (), SIGQUIT);
- #endif
- }
- }
- #endif
- /* Stimulate the internal error mechanism that GDB uses when an
- internal problem is detected. Allows testing of the mechanism.
- Also useful when the user wants to drop a core file but not exit
- GDB. */
- static void
- maintenance_internal_error (const char *args, int from_tty)
- {
- internal_error (__FILE__, __LINE__, "%s", (args == NULL ? "" : args));
- }
- /* Stimulate the internal error mechanism that GDB uses when an
- internal problem is detected. Allows testing of the mechanism.
- Also useful when the user wants to drop a core file but not exit
- GDB. */
- static void
- maintenance_internal_warning (const char *args, int from_tty)
- {
- internal_warning (__FILE__, __LINE__, "%s", (args == NULL ? "" : args));
- }
- /* Stimulate the internal error mechanism that GDB uses when an
- demangler problem is detected. Allows testing of the mechanism. */
- static void
- maintenance_demangler_warning (const char *args, int from_tty)
- {
- demangler_warning (__FILE__, __LINE__, "%s", (args == NULL ? "" : args));
- }
- /* Old command to demangle a string. The command has been moved to "demangle".
- It is kept for now because otherwise "mt demangle" gets interpreted as
- "mt demangler-warning" which artificially creates an internal gdb error. */
- static void
- maintenance_demangle (const char *args, int from_tty)
- {
- gdb_printf (_("This command has been moved to \"demangle\".\n"));
- }
- static void
- maintenance_time_display (const char *args, int from_tty)
- {
- if (args == NULL || *args == '\0')
- gdb_printf (_("\"maintenance time\" takes a numeric argument.\n"));
- else
- set_per_command_time (strtol (args, NULL, 10));
- }
- static void
- maintenance_space_display (const char *args, int from_tty)
- {
- if (args == NULL || *args == '\0')
- gdb_printf ("\"maintenance space\" takes a numeric argument.\n");
- else
- set_per_command_space (strtol (args, NULL, 10));
- }
- /* Mini tokenizing lexer for 'maint info sections' command. */
- static bool
- match_substring (const char *string, const char *substr)
- {
- int substr_len = strlen (substr);
- const char *tok;
- while ((tok = strstr (string, substr)) != NULL)
- {
- /* Got a partial match. Is it a whole word? */
- if (tok == string
- || tok[-1] == ' '
- || tok[-1] == '\t')
- {
- /* Token is delimited at the front... */
- if (tok[substr_len] == ' '
- || tok[substr_len] == '\t'
- || tok[substr_len] == '\0')
- {
- /* Token is delimited at the rear. Got a whole-word match. */
- return true;
- }
- }
- /* Token didn't match as a whole word. Advance and try again. */
- string = tok + 1;
- }
- return false;
- }
- /* Structure holding information about a single bfd section flag. This is
- used by the "maintenance info sections" command to print the sections,
- and for filtering which sections are printed. */
- struct single_bfd_flag_info
- {
- /* The name of the section. This is what is printed for the flag, and
- what the user enter in order to filter by flag. */
- const char *name;
- /* The bfd defined SEC_* flagword value for this flag. */
- flagword value;
- };
- /* Vector of all the known bfd flags. */
- static const single_bfd_flag_info bfd_flag_info[] =
- {
- { "ALLOC", SEC_ALLOC },
- { "LOAD", SEC_LOAD },
- { "RELOC", SEC_RELOC },
- { "READONLY", SEC_READONLY },
- { "CODE", SEC_CODE },
- { "DATA", SEC_DATA },
- { "ROM", SEC_ROM },
- { "CONSTRUCTOR", SEC_CONSTRUCTOR },
- { "HAS_CONTENTS", SEC_HAS_CONTENTS },
- { "NEVER_LOAD", SEC_NEVER_LOAD },
- { "COFF_SHARED_LIBRARY", SEC_COFF_SHARED_LIBRARY },
- { "IS_COMMON", SEC_IS_COMMON }
- };
- /* For each flag in the global BFD_FLAG_INFO list, if FLAGS has a flag's
- flagword value set, and STRING contains the flag's name then return
- true, otherwise return false. STRING is never nullptr. */
- static bool
- match_bfd_flags (const char *string, flagword flags)
- {
- gdb_assert (string != nullptr);
- for (const auto &f : bfd_flag_info)
- {
- if (flags & f.value
- && match_substring (string, f.name))
- return true;
- }
- return false;
- }
- /* Print the names of all flags set in FLAGS. The names are taken from the
- BFD_FLAG_INFO global. */
- static void
- print_bfd_flags (flagword flags)
- {
- for (const auto &f : bfd_flag_info)
- {
- if (flags & f.value)
- gdb_printf (" %s", f.name);
- }
- }
- static void
- maint_print_section_info (const char *name, flagword flags,
- CORE_ADDR addr, CORE_ADDR endaddr,
- unsigned long filepos, int addr_size)
- {
- gdb_printf (" %s", hex_string_custom (addr, addr_size));
- gdb_printf ("->%s", hex_string_custom (endaddr, addr_size));
- gdb_printf (" at %s",
- hex_string_custom ((unsigned long) filepos, 8));
- gdb_printf (": %s", name);
- print_bfd_flags (flags);
- gdb_printf ("\n");
- }
- /* Return the number of digits required to display COUNT in decimal.
- Used when pretty printing index numbers to ensure all of the indexes line
- up.*/
- static int
- index_digits (int count)
- {
- return ((int) log10 ((float) count)) + 1;
- }
- /* Helper function to pretty-print the section index of ASECT from ABFD.
- The INDEX_DIGITS is the number of digits in the largest index that will
- be printed, and is used to pretty-print the resulting string. */
- static void
- print_section_index (bfd *abfd,
- asection *asect,
- int index_digits)
- {
- std::string result
- = string_printf (" [%d] ", gdb_bfd_section_index (abfd, asect));
- /* The '+ 4' for the leading and trailing characters. */
- gdb_printf ("%-*s", (index_digits + 4), result.c_str ());
- }
- /* Print information about ASECT from ABFD. The section will be printed using
- the VMA's from the bfd, which will not be the relocated addresses for bfds
- that should be relocated. The information must be printed with the same
- layout as PRINT_OBJFILE_SECTION_INFO below.
- ARG is the argument string passed by the user to the top level maintenance
- info sections command. Used for filtering which sections are printed. */
- static void
- print_bfd_section_info (bfd *abfd, asection *asect, const char *arg,
- int index_digits)
- {
- flagword flags = bfd_section_flags (asect);
- const char *name = bfd_section_name (asect);
- if (arg == NULL || *arg == '\0'
- || match_substring (arg, name)
- || match_bfd_flags (arg, flags))
- {
- struct gdbarch *gdbarch = gdbarch_from_bfd (abfd);
- int addr_size = gdbarch_addr_bit (gdbarch) / 8;
- CORE_ADDR addr, endaddr;
- addr = bfd_section_vma (asect);
- endaddr = addr + bfd_section_size (asect);
- print_section_index (abfd, asect, index_digits);
- maint_print_section_info (name, flags, addr, endaddr,
- asect->filepos, addr_size);
- }
- }
- /* Print information about ASECT which is GDB's wrapper around a section
- from ABFD. The information must be printed with the same layout as
- PRINT_BFD_SECTION_INFO above. PRINT_DATA holds information used to
- filter which sections are printed, and for formatting the output.
- ARG is the argument string passed by the user to the top level maintenance
- info sections command. Used for filtering which sections are printed. */
- static void
- print_objfile_section_info (bfd *abfd, struct obj_section *asect,
- const char *arg, int index_digits)
- {
- flagword flags = bfd_section_flags (asect->the_bfd_section);
- const char *name = bfd_section_name (asect->the_bfd_section);
- if (arg == NULL || *arg == '\0'
- || match_substring (arg, name)
- || match_bfd_flags (arg, flags))
- {
- struct gdbarch *gdbarch = gdbarch_from_bfd (abfd);
- int addr_size = gdbarch_addr_bit (gdbarch) / 8;
- print_section_index (abfd, asect->the_bfd_section, index_digits);
- maint_print_section_info (name, flags,
- asect->addr (), asect->endaddr (),
- asect->the_bfd_section->filepos,
- addr_size);
- }
- }
- /* Find an obj_section, GDB's wrapper around a bfd section for ASECTION
- from ABFD. It might be that no such wrapper exists (for example debug
- sections don't have such wrappers) in which case nullptr is returned. */
- obj_section *
- maint_obj_section_from_bfd_section (bfd *abfd,
- asection *asection,
- objfile *ofile)
- {
- if (ofile->sections == nullptr)
- return nullptr;
- obj_section *osect
- = &ofile->sections[gdb_bfd_section_index (abfd, asection)];
- if (osect >= ofile->sections_end)
- return nullptr;
- return osect;
- }
- /* Print information about all sections from ABFD, which is the bfd
- corresponding to OBJFILE. It is fine for OBJFILE to be nullptr, but
- ABFD must never be nullptr. If OBJFILE is provided then the sections of
- ABFD will (potentially) be displayed relocated (i.e. the object file was
- loaded with add-symbol-file and custom offsets were provided).
- HEADER is a string that describes this file, e.g. 'Exec file: ', or
- 'Core file: '.
- ARG is a string used for filtering which sections are printed, this can
- be nullptr for no filtering. See the top level 'maint info sections'
- for a fuller description of the possible filtering strings. */
- static void
- maint_print_all_sections (const char *header, bfd *abfd, objfile *objfile,
- const char *arg)
- {
- gdb_puts (header);
- gdb_stdout->wrap_here (8);
- gdb_printf ("`%s', ", bfd_get_filename (abfd));
- gdb_stdout->wrap_here (8);
- gdb_printf (_("file type %s.\n"), bfd_get_target (abfd));
- int section_count = gdb_bfd_count_sections (abfd);
- int digits = index_digits (section_count);
- for (asection *sect : gdb_bfd_sections (abfd))
- {
- obj_section *osect = nullptr;
- if (objfile != nullptr)
- {
- gdb_assert (objfile->sections != nullptr);
- osect
- = maint_obj_section_from_bfd_section (abfd, sect, objfile);
- if (osect->the_bfd_section == nullptr)
- osect = nullptr;
- }
- if (osect == nullptr)
- print_bfd_section_info (abfd, sect, arg, digits);
- else
- print_objfile_section_info (abfd, osect, arg, digits);
- }
- }
- /* The options for the "maintenance info sections" command. */
- struct maint_info_sections_opts
- {
- /* For "-all-objects". */
- bool all_objects = false;
- };
- static const gdb::option::option_def maint_info_sections_option_defs[] = {
- gdb::option::flag_option_def<maint_info_sections_opts> {
- "all-objects",
- [] (maint_info_sections_opts *opts) { return &opts->all_objects; },
- N_("Display information from all loaded object files."),
- },
- };
- /* Create an option_def_group for the "maintenance info sections" options,
- with CC_OPTS as context. */
- static inline gdb::option::option_def_group
- make_maint_info_sections_options_def_group (maint_info_sections_opts *cc_opts)
- {
- return {{maint_info_sections_option_defs}, cc_opts};
- }
- /* Completion for the "maintenance info sections" command. */
- static void
- maint_info_sections_completer (struct cmd_list_element *cmd,
- completion_tracker &tracker,
- const char *text, const char * /* word */)
- {
- /* Complete command options. */
- const auto group = make_maint_info_sections_options_def_group (nullptr);
- if (gdb::option::complete_options
- (tracker, &text, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_ERROR, group))
- return;
- const char *word = advance_to_expression_complete_word_point (tracker, text);
- /* Offer completion for section flags, but not section names. This is
- only a maintenance command after all, no point going over the top. */
- std::vector<const char *> flags;
- for (const auto &f : bfd_flag_info)
- flags.push_back (f.name);
- flags.push_back (nullptr);
- complete_on_enum (tracker, flags.data (), text, word);
- }
- /* Implement the "maintenance info sections" command. */
- static void
- maintenance_info_sections (const char *arg, int from_tty)
- {
- /* Check if the "-all-objects" flag was passed. */
- maint_info_sections_opts opts;
- const auto group = make_maint_info_sections_options_def_group (&opts);
- gdb::option::process_options
- (&arg, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_ERROR, group);
- for (objfile *ofile : current_program_space->objfiles ())
- {
- if (ofile->obfd == current_program_space->exec_bfd ())
- maint_print_all_sections (_("Exec file: "), ofile->obfd, ofile, arg);
- else if (opts.all_objects)
- maint_print_all_sections (_("Object file: "), ofile->obfd, ofile, arg);
- }
- if (core_bfd)
- maint_print_all_sections (_("Core file: "), core_bfd, nullptr, arg);
- }
- /* Implement the "maintenance info target-sections" command. */
- static void
- maintenance_info_target_sections (const char *arg, int from_tty)
- {
- bfd *abfd = nullptr;
- int digits = 0;
- const target_section_table *table
- = target_get_section_table (current_inferior ()->top_target ());
- if (table == nullptr)
- return;
- for (const target_section &sec : *table)
- {
- if (abfd == nullptr || sec.the_bfd_section->owner != abfd)
- {
- abfd = sec.the_bfd_section->owner;
- digits = std::max (index_digits (gdb_bfd_count_sections (abfd)),
- digits);
- }
- }
- struct gdbarch *gdbarch = nullptr;
- int addr_size = 0;
- abfd = nullptr;
- for (const target_section &sec : *table)
- {
- if (sec.the_bfd_section->owner != abfd)
- {
- abfd = sec.the_bfd_section->owner;
- gdbarch = gdbarch_from_bfd (abfd);
- addr_size = gdbarch_addr_bit (gdbarch) / 8;
- gdb_printf (_("From '%s', file type %s:\n"),
- bfd_get_filename (abfd), bfd_get_target (abfd));
- }
- print_bfd_section_info (abfd,
- sec.the_bfd_section,
- nullptr,
- digits);
- /* The magic '8 + digits' here ensures that the 'Start' is aligned
- with the output of print_bfd_section_info. */
- gdb_printf ("%*sStart: %s, End: %s, Owner token: %p\n",
- (8 + digits), "",
- hex_string_custom (sec.addr, addr_size),
- hex_string_custom (sec.endaddr, addr_size),
- sec.owner);
- }
- }
- static void
- maintenance_print_statistics (const char *args, int from_tty)
- {
- print_objfile_statistics ();
- }
- static void
- maintenance_print_architecture (const char *args, int from_tty)
- {
- struct gdbarch *gdbarch = get_current_arch ();
- if (args == NULL)
- gdbarch_dump (gdbarch, gdb_stdout);
- else
- {
- stdio_file file;
- if (!file.open (args, "w"))
- perror_with_name (_("maintenance print architecture"));
- gdbarch_dump (gdbarch, &file);
- }
- }
- /* The "maintenance translate-address" command converts a section and address
- to a symbol. This can be called in two ways:
- maintenance translate-address <secname> <addr>
- or maintenance translate-address <addr>. */
- static void
- maintenance_translate_address (const char *arg, int from_tty)
- {
- CORE_ADDR address;
- struct obj_section *sect;
- const char *p;
- struct bound_minimal_symbol sym;
- if (arg == NULL || *arg == 0)
- error (_("requires argument (address or section + address)"));
- sect = NULL;
- p = arg;
- if (!isdigit (*p))
- { /* See if we have a valid section name. */
- while (*p && !isspace (*p)) /* Find end of section name. */
- p++;
- if (*p == '\000') /* End of command? */
- error (_("Need to specify section name and address"));
- int arg_len = p - arg;
- p = skip_spaces (p + 1);
- for (objfile *objfile : current_program_space->objfiles ())
- ALL_OBJFILE_OSECTIONS (objfile, sect)
- {
- if (strncmp (sect->the_bfd_section->name, arg, arg_len) == 0)
- goto found;
- }
- error (_("Unknown section %s."), arg);
- found: ;
- }
- address = parse_and_eval_address (p);
- if (sect)
- sym = lookup_minimal_symbol_by_pc_section (address, sect);
- else
- sym = lookup_minimal_symbol_by_pc (address);
- if (sym.minsym)
- {
- const char *symbol_name = sym.minsym->print_name ();
- const char *symbol_offset
- = pulongest (address - BMSYMBOL_VALUE_ADDRESS (sym));
- sect = sym.obj_section ();
- if (sect != NULL)
- {
- const char *section_name;
- const char *obj_name;
- gdb_assert (sect->the_bfd_section && sect->the_bfd_section->name);
- section_name = sect->the_bfd_section->name;
- gdb_assert (sect->objfile && objfile_name (sect->objfile));
- obj_name = objfile_name (sect->objfile);
- if (current_program_space->multi_objfile_p ())
- gdb_printf (_("%s + %s in section %s of %s\n"),
- symbol_name, symbol_offset,
- section_name, obj_name);
- else
- gdb_printf (_("%s + %s in section %s\n"),
- symbol_name, symbol_offset, section_name);
- }
- else
- gdb_printf (_("%s + %s\n"), symbol_name, symbol_offset);
- }
- else if (sect)
- gdb_printf (_("no symbol at %s:%s\n"),
- sect->the_bfd_section->name, hex_string (address));
- else
- gdb_printf (_("no symbol at %s\n"), hex_string (address));
- return;
- }
- /* When a command is deprecated the user will be warned the first time
- the command is used. If possible, a replacement will be
- offered. */
- static void
- maintenance_deprecate (const char *args, int from_tty)
- {
- if (args == NULL || *args == '\0')
- {
- gdb_printf (_("\"maintenance deprecate\" takes an argument,\n\
- the command you want to deprecate, and optionally the replacement command\n\
- enclosed in quotes.\n"));
- }
- maintenance_do_deprecate (args, 1);
- }
- static void
- maintenance_undeprecate (const char *args, int from_tty)
- {
- if (args == NULL || *args == '\0')
- {
- gdb_printf (_("\"maintenance undeprecate\" takes an argument, \n\
- the command you want to undeprecate.\n"));
- }
- maintenance_do_deprecate (args, 0);
- }
- /* You really shouldn't be using this. It is just for the testsuite.
- Rather, you should use deprecate_cmd() when the command is created
- in _initialize_blah().
- This function deprecates a command and optionally assigns it a
- replacement. */
- static void
- maintenance_do_deprecate (const char *text, int deprecate)
- {
- struct cmd_list_element *alias = NULL;
- struct cmd_list_element *prefix_cmd = NULL;
- struct cmd_list_element *cmd = NULL;
- const char *start_ptr = NULL;
- const char *end_ptr = NULL;
- int len;
- char *replacement = NULL;
- if (text == NULL)
- return;
- if (!lookup_cmd_composition (text, &alias, &prefix_cmd, &cmd))
- {
- gdb_printf (_("Can't find command '%s' to deprecate.\n"), text);
- return;
- }
- if (deprecate)
- {
- /* Look for a replacement command. */
- start_ptr = strchr (text, '\"');
- if (start_ptr != NULL)
- {
- start_ptr++;
- end_ptr = strrchr (start_ptr, '\"');
- if (end_ptr != NULL)
- {
- len = end_ptr - start_ptr;
- replacement = savestring (start_ptr, len);
- }
- }
- }
- if (!start_ptr || !end_ptr)
- replacement = NULL;
- /* If they used an alias, we only want to deprecate the alias.
- Note the MALLOCED_REPLACEMENT test. If the command's replacement
- string was allocated at compile time we don't want to free the
- memory. */
- if (alias)
- {
- if (alias->malloced_replacement)
- xfree ((char *) alias->replacement);
- if (deprecate)
- {
- alias->deprecated_warn_user = 1;
- alias->cmd_deprecated = 1;
- }
- else
- {
- alias->deprecated_warn_user = 0;
- alias->cmd_deprecated = 0;
- }
- alias->replacement = replacement;
- alias->malloced_replacement = 1;
- return;
- }
- else if (cmd)
- {
- if (cmd->malloced_replacement)
- xfree ((char *) cmd->replacement);
- if (deprecate)
- {
- cmd->deprecated_warn_user = 1;
- cmd->cmd_deprecated = 1;
- }
- else
- {
- cmd->deprecated_warn_user = 0;
- cmd->cmd_deprecated = 0;
- }
- cmd->replacement = replacement;
- cmd->malloced_replacement = 1;
- return;
- }
- xfree (replacement);
- }
- /* Maintenance set/show framework. */
- struct cmd_list_element *maintenance_set_cmdlist;
- struct cmd_list_element *maintenance_show_cmdlist;
- /* "maintenance with" command. */
- static void
- maintenance_with_cmd (const char *args, int from_tty)
- {
- with_command_1 ("maintenance set ", maintenance_set_cmdlist, args, from_tty);
- }
- /* "maintenance with" command completer. */
- static void
- maintenance_with_cmd_completer (struct cmd_list_element *ignore,
- completion_tracker &tracker,
- const char *text, const char * /*word*/)
- {
- with_command_completer_1 ("maintenance set ", tracker, text);
- }
- /* Profiling support. */
- static bool maintenance_profile_p;
- static void
- show_maintenance_profile_p (struct ui_file *file, int from_tty,
- struct cmd_list_element *c, const char *value)
- {
- gdb_printf (file, _("Internal profiling is %s.\n"), value);
- }
- #ifdef HAVE__ETEXT
- extern char _etext;
- #define TEXTEND &_etext
- #elif defined (HAVE_ETEXT)
- extern char etext;
- #define TEXTEND &etext
- #endif
- #if defined (HAVE_MONSTARTUP) && defined (HAVE__MCLEANUP) && defined (TEXTEND)
- static int profiling_state;
- EXTERN_C void _mcleanup (void);
- static void
- mcleanup_wrapper (void)
- {
- if (profiling_state)
- _mcleanup ();
- }
- EXTERN_C void monstartup (unsigned long, unsigned long);
- extern int main ();
- static void
- maintenance_set_profile_cmd (const char *args, int from_tty,
- struct cmd_list_element *c)
- {
- if (maintenance_profile_p == profiling_state)
- return;
- profiling_state = maintenance_profile_p;
- if (maintenance_profile_p)
- {
- static int profiling_initialized;
- if (!profiling_initialized)
- {
- atexit (mcleanup_wrapper);
- profiling_initialized = 1;
- }
- /* "main" is now always the first function in the text segment, so use
- its address for monstartup. */
- monstartup ((unsigned long) &main, (unsigned long) TEXTEND);
- }
- else
- {
- extern void _mcleanup (void);
- _mcleanup ();
- }
- }
- #else
- static void
- maintenance_set_profile_cmd (const char *args, int from_tty,
- struct cmd_list_element *c)
- {
- error (_("Profiling support is not available on this system."));
- }
- #endif
- static int n_worker_threads = -1;
- /* Update the thread pool for the desired number of threads. */
- static void
- update_thread_pool_size ()
- {
- #if CXX_STD_THREAD
- int n_threads = n_worker_threads;
- if (n_threads < 0)
- n_threads = std::thread::hardware_concurrency ();
- gdb::thread_pool::g_thread_pool->set_thread_count (n_threads);
- #endif
- }
- static void
- maintenance_set_worker_threads (const char *args, int from_tty,
- struct cmd_list_element *c)
- {
- update_thread_pool_size ();
- }
- static void
- maintenance_show_worker_threads (struct ui_file *file, int from_tty,
- struct cmd_list_element *c,
- const char *value)
- {
- #if CXX_STD_THREAD
- if (n_worker_threads == -1)
- {
- gdb_printf (file, _("The number of worker threads GDB "
- "can use is unlimited (currently %zu).\n"),
- gdb::thread_pool::g_thread_pool->thread_count ());
- return;
- }
- #endif
- int report_threads = 0;
- #if CXX_STD_THREAD
- report_threads = n_worker_threads;
- #endif
- gdb_printf (file, _("The number of worker threads GDB "
- "can use is %d.\n"),
- report_threads);
- }
- /* If true, display time usage both at startup and for each command. */
- static bool per_command_time;
- /* If true, display space usage both at startup and for each command. */
- static bool per_command_space;
- /* If true, display basic symtab stats for each command. */
- static bool per_command_symtab;
- /* mt per-command commands. */
- static struct cmd_list_element *per_command_setlist;
- static struct cmd_list_element *per_command_showlist;
- /* Set whether to display time statistics to NEW_VALUE
- (non-zero means true). */
- void
- set_per_command_time (int new_value)
- {
- per_command_time = new_value;
- }
- /* Set whether to display space statistics to NEW_VALUE
- (non-zero means true). */
- void
- set_per_command_space (int new_value)
- {
- per_command_space = new_value;
- }
- /* Count the number of symtabs and blocks. */
- static void
- count_symtabs_and_blocks (int *nr_symtabs_ptr, int *nr_compunit_symtabs_ptr,
- int *nr_blocks_ptr)
- {
- int nr_symtabs = 0;
- int nr_compunit_symtabs = 0;
- int nr_blocks = 0;
- /* When collecting statistics during startup, this is called before
- pretty much anything in gdb has been initialized, and thus
- current_program_space may be NULL. */
- if (current_program_space != NULL)
- {
- for (objfile *o : current_program_space->objfiles ())
- {
- for (compunit_symtab *cu : o->compunits ())
- {
- ++nr_compunit_symtabs;
- nr_blocks += BLOCKVECTOR_NBLOCKS (cu->blockvector ());
- nr_symtabs += std::distance (cu->filetabs ().begin (),
- cu->filetabs ().end ());
- }
- }
- }
- *nr_symtabs_ptr = nr_symtabs;
- *nr_compunit_symtabs_ptr = nr_compunit_symtabs;
- *nr_blocks_ptr = nr_blocks;
- }
- /* As indicated by display_time and display_space, report GDB's
- elapsed time and space usage from the base time and space recorded
- in this object. */
- scoped_command_stats::~scoped_command_stats ()
- {
- /* Early exit if we're not reporting any stats. It can be expensive to
- compute the pre-command values so don't collect them at all if we're
- not reporting stats. Alas this doesn't work in the startup case because
- we don't know yet whether we will be reporting the stats. For the
- startup case collect the data anyway (it should be cheap at this point),
- and leave it to the reporter to decide whether to print them. */
- if (m_msg_type
- && !per_command_time
- && !per_command_space
- && !per_command_symtab)
- return;
- if (m_time_enabled && per_command_time)
- {
- print_time (_("command finished"));
- using namespace std::chrono;
- run_time_clock::duration cmd_time
- = run_time_clock::now () - m_start_cpu_time;
- steady_clock::duration wall_time
- = steady_clock::now () - m_start_wall_time;
- /* Subtract time spend in prompt_for_continue from walltime. */
- wall_time -= get_prompt_for_continue_wait_time ();
- gdb_printf (gdb_stdlog,
- !m_msg_type
- ? _("Startup time: %.6f (cpu), %.6f (wall)\n")
- : _("Command execution time: %.6f (cpu), %.6f (wall)\n"),
- duration<double> (cmd_time).count (),
- duration<double> (wall_time).count ());
- }
- if (m_space_enabled && per_command_space)
- {
- #ifdef HAVE_USEFUL_SBRK
- char *lim = (char *) sbrk (0);
- long space_now = lim - lim_at_start;
- long space_diff = space_now - m_start_space;
- gdb_printf (gdb_stdlog,
- !m_msg_type
- ? _("Space used: %ld (%s%ld during startup)\n")
- : _("Space used: %ld (%s%ld for this command)\n"),
- space_now,
- (space_diff >= 0 ? "+" : ""),
- space_diff);
- #endif
- }
- if (m_symtab_enabled && per_command_symtab)
- {
- int nr_symtabs, nr_compunit_symtabs, nr_blocks;
- count_symtabs_and_blocks (&nr_symtabs, &nr_compunit_symtabs, &nr_blocks);
- gdb_printf (gdb_stdlog,
- _("#symtabs: %d (+%d),"
- " #compunits: %d (+%d),"
- " #blocks: %d (+%d)\n"),
- nr_symtabs,
- nr_symtabs - m_start_nr_symtabs,
- nr_compunit_symtabs,
- (nr_compunit_symtabs
- - m_start_nr_compunit_symtabs),
- nr_blocks,
- nr_blocks - m_start_nr_blocks);
- }
- }
- scoped_command_stats::scoped_command_stats (bool msg_type)
- : m_msg_type (msg_type)
- {
- if (!m_msg_type || per_command_space)
- {
- #ifdef HAVE_USEFUL_SBRK
- char *lim = (char *) sbrk (0);
- m_start_space = lim - lim_at_start;
- m_space_enabled = 1;
- #endif
- }
- else
- m_space_enabled = 0;
- if (msg_type == 0 || per_command_time)
- {
- using namespace std::chrono;
- m_start_cpu_time = run_time_clock::now ();
- m_start_wall_time = steady_clock::now ();
- m_time_enabled = 1;
- if (per_command_time)
- print_time (_("command started"));
- }
- else
- m_time_enabled = 0;
- if (msg_type == 0 || per_command_symtab)
- {
- int nr_symtabs, nr_compunit_symtabs, nr_blocks;
- count_symtabs_and_blocks (&nr_symtabs, &nr_compunit_symtabs, &nr_blocks);
- m_start_nr_symtabs = nr_symtabs;
- m_start_nr_compunit_symtabs = nr_compunit_symtabs;
- m_start_nr_blocks = nr_blocks;
- m_symtab_enabled = 1;
- }
- else
- m_symtab_enabled = 0;
- /* Initialize timer to keep track of how long we waited for the user. */
- reset_prompt_for_continue_wait_time ();
- }
- /* See maint.h. */
- void
- scoped_command_stats::print_time (const char *msg)
- {
- using namespace std::chrono;
- auto now = system_clock::now ();
- auto ticks = now.time_since_epoch ().count () / (1000 * 1000);
- auto millis = ticks % 1000;
- std::time_t as_time = system_clock::to_time_t (now);
- struct tm tm;
- localtime_r (&as_time, &tm);
- char out[100];
- strftime (out, sizeof (out), "%F %H:%M:%S", &tm);
- gdb_printf (gdb_stdlog, "%s.%03d - %s\n", out, (int) millis, msg);
- }
- /* Handle unknown "mt set per-command" arguments.
- In this case have "mt set per-command on|off" affect every setting. */
- static void
- set_per_command_cmd (const char *args, int from_tty)
- {
- struct cmd_list_element *list;
- int val;
- val = parse_cli_boolean_value (args);
- if (val < 0)
- error (_("Bad value for 'mt set per-command no'."));
- for (list = per_command_setlist; list != NULL; list = list->next)
- if (list->var->type () == var_boolean)
- {
- gdb_assert (list->type == set_cmd);
- do_set_command (args, from_tty, list);
- }
- }
- /* Options affecting the "maintenance selftest" command. */
- struct maintenance_selftest_options
- {
- bool verbose = false;
- } user_maintenance_selftest_options;
- static const gdb::option::option_def maintenance_selftest_option_defs[] = {
- gdb::option::boolean_option_def<maintenance_selftest_options> {
- "verbose",
- [] (maintenance_selftest_options *opt) { return &opt->verbose; },
- nullptr,
- N_("Set whether selftests run in verbose mode."),
- N_("Show whether selftests run in verbose mode."),
- N_("\
- When on, selftests may print verbose information."),
- },
- };
- /* Make option groups for the "maintenance selftest" command. */
- static std::array<gdb::option::option_def_group, 1>
- make_maintenance_selftest_option_group (maintenance_selftest_options *opts)
- {
- return {{
- {{maintenance_selftest_option_defs}, opts},
- }};
- }
- /* The "maintenance selftest" command. */
- static void
- maintenance_selftest (const char *args, int from_tty)
- {
- #if GDB_SELF_TEST
- maintenance_selftest_options opts = user_maintenance_selftest_options;
- auto grp = make_maintenance_selftest_option_group (&opts);
- gdb::option::process_options
- (&args, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_ERROR, grp);
- const gdb_argv argv (args);
- selftests::run_tests (argv.as_array_view (), opts.verbose);
- #else
- gdb_printf (_("\
- Selftests have been disabled for this build.\n"));
- #endif
- }
- /* Completer for the "maintenance selftest" command. */
- static void
- maintenance_selftest_completer (cmd_list_element *cmd,
- completion_tracker &tracker,
- const char *text,
- const char *word)
- {
- auto grp = make_maintenance_selftest_option_group (nullptr);
- if (gdb::option::complete_options
- (tracker, &text, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_ERROR, grp))
- return;
- #if GDB_SELF_TEST
- selftests::for_each_selftest ([&tracker, text] (const std::string &name)
- {
- if (startswith (name.c_str (), text))
- tracker.add_completion (make_unique_xstrdup (name.c_str ()));
- });
- #endif
- }
- static void
- maintenance_info_selftests (const char *arg, int from_tty)
- {
- #if GDB_SELF_TEST
- gdb_printf ("Registered selftests:\n");
- selftests::for_each_selftest ([] (const std::string &name) {
- gdb_printf (" - %s\n", name.c_str ());
- });
- #else
- gdb_printf (_("\
- Selftests have been disabled for this build.\n"));
- #endif
- }
- void _initialize_maint_cmds ();
- void
- _initialize_maint_cmds ()
- {
- struct cmd_list_element *cmd;
- cmd_list_element *maintenance_cmd
- = add_basic_prefix_cmd ("maintenance", class_maintenance, _("\
- Commands for use by GDB maintainers.\n\
- Includes commands to dump specific internal GDB structures in\n\
- a human readable form, to cause GDB to deliberately dump core, etc."),
- &maintenancelist, 0,
- &cmdlist);
- add_com_alias ("mt", maintenance_cmd, class_maintenance, 1);
- cmd_list_element *maintenance_info_cmd
- = add_basic_prefix_cmd ("info", class_maintenance, _("\
- Commands for showing internal info about the program being debugged."),
- &maintenanceinfolist, 0,
- &maintenancelist);
- add_alias_cmd ("i", maintenance_info_cmd, class_maintenance, 1,
- &maintenancelist);
- const auto opts = make_maint_info_sections_options_def_group (nullptr);
- static std::string maint_info_sections_command_help
- = gdb::option::build_help (_("\
- List the BFD sections of the exec and core files.\n\
- \n\
- Usage: maintenance info sections [-all-objects] [FILTERS]\n\
- \n\
- FILTERS is a list of words, each word is either:\n\
- + A section name - any section with this name will be printed, or\n\
- + A section flag - any section with this flag will be printed. The\n\
- known flags are:\n\
- ALLOC LOAD RELOC READONLY CODE DATA ROM CONSTRUCTOR\n\
- HAS_CONTENTS NEVER_LOAD COFF_SHARED_LIBRARY IS_COMMON\n\
- \n\
- Sections matching any of the FILTERS will be listed (no FILTERS implies\n\
- all sections should be printed).\n\
- \n\
- Options:\n\
- %OPTIONS%"), opts);
- cmd = add_cmd ("sections", class_maintenance, maintenance_info_sections,
- maint_info_sections_command_help.c_str (),
- &maintenanceinfolist);
- set_cmd_completer_handle_brkchars (cmd, maint_info_sections_completer);
- add_cmd ("target-sections", class_maintenance,
- maintenance_info_target_sections, _("\
- List GDB's internal section table.\n\
- \n\
- Print the current targets section list. This is a sub-set of all\n\
- sections, from all objects currently loaded. Usually the ALLOC\n\
- sectoins."),
- &maintenanceinfolist);
- add_basic_prefix_cmd ("print", class_maintenance,
- _("Maintenance command for printing GDB internal state."),
- &maintenanceprintlist, 0,
- &maintenancelist);
- add_basic_prefix_cmd ("flush", class_maintenance,
- _("Maintenance command for flushing GDB internal caches."),
- &maintenanceflushlist, 0,
- &maintenancelist);
- add_basic_prefix_cmd ("set", class_maintenance, _("\
- Set GDB internal variables used by the GDB maintainer.\n\
- Configure variables internal to GDB that aid in GDB's maintenance"),
- &maintenance_set_cmdlist,
- 0/*allow-unknown*/,
- &maintenancelist);
- add_show_prefix_cmd ("show", class_maintenance, _("\
- Show GDB internal variables used by the GDB maintainer.\n\
- Configure variables internal to GDB that aid in GDB's maintenance"),
- &maintenance_show_cmdlist,
- 0/*allow-unknown*/,
- &maintenancelist);
- cmd = add_cmd ("with", class_maintenance, maintenance_with_cmd, _("\
- Like \"with\", but works with \"maintenance set\" variables.\n\
- Usage: maintenance with SETTING [VALUE] [-- COMMAND]\n\
- With no COMMAND, repeats the last executed command.\n\
- SETTING is any setting you can change with the \"maintenance set\"\n\
- subcommands."),
- &maintenancelist);
- set_cmd_completer_handle_brkchars (cmd, maintenance_with_cmd_completer);
- #ifndef _WIN32
- add_cmd ("dump-me", class_maintenance, maintenance_dump_me, _("\
- Get fatal error; make debugger dump its core.\n\
- GDB sets its handling of SIGQUIT back to SIG_DFL and then sends\n\
- itself a SIGQUIT signal."),
- &maintenancelist);
- #endif
- add_cmd ("internal-error", class_maintenance,
- maintenance_internal_error, _("\
- Give GDB an internal error.\n\
- Cause GDB to behave as if an internal error was detected."),
- &maintenancelist);
- add_cmd ("internal-warning", class_maintenance,
- maintenance_internal_warning, _("\
- Give GDB an internal warning.\n\
- Cause GDB to behave as if an internal warning was reported."),
- &maintenancelist);
- add_cmd ("demangler-warning", class_maintenance,
- maintenance_demangler_warning, _("\
- Give GDB a demangler warning.\n\
- Cause GDB to behave as if a demangler warning was reported."),
- &maintenancelist);
- cmd = add_cmd ("demangle", class_maintenance, maintenance_demangle, _("\
- This command has been moved to \"demangle\"."),
- &maintenancelist);
- deprecate_cmd (cmd, "demangle");
- add_prefix_cmd ("per-command", class_maintenance, set_per_command_cmd, _("\
- Per-command statistics settings."),
- &per_command_setlist,
- 1/*allow-unknown*/, &maintenance_set_cmdlist);
- add_show_prefix_cmd ("per-command", class_maintenance, _("\
- Show per-command statistics settings."),
- &per_command_showlist,
- 0/*allow-unknown*/, &maintenance_show_cmdlist);
- add_setshow_boolean_cmd ("time", class_maintenance,
- &per_command_time, _("\
- Set whether to display per-command execution time."), _("\
- Show whether to display per-command execution time."),
- _("\
- If enabled, the execution time for each command will be\n\
- displayed following the command's output."),
- NULL, NULL,
- &per_command_setlist, &per_command_showlist);
- add_setshow_boolean_cmd ("space", class_maintenance,
- &per_command_space, _("\
- Set whether to display per-command space usage."), _("\
- Show whether to display per-command space usage."),
- _("\
- If enabled, the space usage for each command will be\n\
- displayed following the command's output."),
- NULL, NULL,
- &per_command_setlist, &per_command_showlist);
- add_setshow_boolean_cmd ("symtab", class_maintenance,
- &per_command_symtab, _("\
- Set whether to display per-command symtab statistics."), _("\
- Show whether to display per-command symtab statistics."),
- _("\
- If enabled, the basic symtab statistics for each command will be\n\
- displayed following the command's output."),
- NULL, NULL,
- &per_command_setlist, &per_command_showlist);
- /* This is equivalent to "mt set per-command time on".
- Kept because some people are used to typing "mt time 1". */
- add_cmd ("time", class_maintenance, maintenance_time_display, _("\
- Set the display of time usage.\n\
- If nonzero, will cause the execution time for each command to be\n\
- displayed, following the command's output."),
- &maintenancelist);
- /* This is equivalent to "mt set per-command space on".
- Kept because some people are used to typing "mt space 1". */
- add_cmd ("space", class_maintenance, maintenance_space_display, _("\
- Set the display of space usage.\n\
- If nonzero, will cause the execution space for each command to be\n\
- displayed, following the command's output."),
- &maintenancelist);
- cmd = add_cmd ("type", class_maintenance, maintenance_print_type, _("\
- Print a type chain for a given symbol.\n\
- For each node in a type chain, print the raw data for each member of\n\
- the type structure, and the interpretation of the data."),
- &maintenanceprintlist);
- set_cmd_completer (cmd, expression_completer);
- add_cmd ("statistics", class_maintenance, maintenance_print_statistics,
- _("Print statistics about internal gdb state."),
- &maintenanceprintlist);
- add_cmd ("architecture", class_maintenance,
- maintenance_print_architecture, _("\
- Print the internal architecture configuration.\n\
- Takes an optional file parameter."),
- &maintenanceprintlist);
- add_basic_prefix_cmd ("check", class_maintenance, _("\
- Commands for checking internal gdb state."),
- &maintenancechecklist, 0,
- &maintenancelist);
- add_cmd ("translate-address", class_maintenance,
- maintenance_translate_address,
- _("Translate a section name and address to a symbol."),
- &maintenancelist);
- add_cmd ("deprecate", class_maintenance, maintenance_deprecate, _("\
- Deprecate a command (for testing purposes).\n\
- Usage: maintenance deprecate COMMANDNAME [\"REPLACEMENT\"]\n\
- This is used by the testsuite to check the command deprecator.\n\
- You probably shouldn't use this,\n\
- rather you should use the C function deprecate_cmd()."), &maintenancelist);
- add_cmd ("undeprecate", class_maintenance, maintenance_undeprecate, _("\
- Undeprecate a command (for testing purposes).\n\
- Usage: maintenance undeprecate COMMANDNAME\n\
- This is used by the testsuite to check the command deprecator.\n\
- You probably shouldn't use this."),
- &maintenancelist);
- cmd_list_element *maintenance_selftest_cmd
- = add_cmd ("selftest", class_maintenance, maintenance_selftest, _("\
- Run gdb's unit tests.\n\
- Usage: maintenance selftest [FILTER]\n\
- This will run any unit tests that were built in to gdb.\n\
- If a filter is given, only the tests with that value in their name will ran."),
- &maintenancelist);
- set_cmd_completer_handle_brkchars (maintenance_selftest_cmd,
- maintenance_selftest_completer);
- add_cmd ("selftests", class_maintenance, maintenance_info_selftests,
- _("List the registered selftests."), &maintenanceinfolist);
- add_setshow_boolean_cmd ("profile", class_maintenance,
- &maintenance_profile_p, _("\
- Set internal profiling."), _("\
- Show internal profiling."), _("\
- When enabled GDB is profiled."),
- maintenance_set_profile_cmd,
- show_maintenance_profile_p,
- &maintenance_set_cmdlist,
- &maintenance_show_cmdlist);
- add_setshow_zuinteger_unlimited_cmd ("worker-threads",
- class_maintenance,
- &n_worker_threads, _("\
- Set the number of worker threads GDB can use."), _("\
- Show the number of worker threads GDB can use."), _("\
- GDB may use multiple threads to speed up certain CPU-intensive operations,\n\
- such as demangling symbol names."),
- maintenance_set_worker_threads,
- maintenance_show_worker_threads,
- &maintenance_set_cmdlist,
- &maintenance_show_cmdlist);
- /* Add the "maint set/show selftest" commands. */
- static cmd_list_element *set_selftest_cmdlist = nullptr;
- static cmd_list_element *show_selftest_cmdlist = nullptr;
- add_setshow_prefix_cmd ("selftest", class_maintenance,
- _("Self tests-related settings."),
- _("Self tests-related settings."),
- &set_selftest_cmdlist, &show_selftest_cmdlist,
- &maintenance_set_cmdlist, &maintenance_show_cmdlist);
- /* Add setting commands matching "maintenance selftest" options. */
- gdb::option::add_setshow_cmds_for_options (class_maintenance,
- &user_maintenance_selftest_options,
- maintenance_selftest_option_defs,
- &set_selftest_cmdlist,
- &show_selftest_cmdlist);
- update_thread_pool_size ();
- }
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