diff options
Diffstat (limited to 'gdb/maint.c')
| -rw-r--r-- | gdb/maint.c | 76 |
1 files changed, 70 insertions, 6 deletions
diff --git a/gdb/maint.c b/gdb/maint.c index 766ab74..78dea22 100644 --- a/gdb/maint.c +++ b/gdb/maint.c @@ -920,9 +920,9 @@ maintenance_show_worker_threads (struct ui_file *file, int from_tty, } -/* If true, display time usage both at startup and for each command. */ +/* See maint.h. */ -static bool per_command_time; +bool per_command_time; /* If true, display space usage both at startup and for each command. */ @@ -1151,6 +1151,72 @@ set_per_command_cmd (const char *args, int from_tty) } } +/* Handle "mt set per-command time". Warn if per-thread run time + information is not possible. */ + +static void +maintenance_set_command_time_cmd (const char *args, int from_tty, + cmd_list_element *c) +{ + /* No point warning if this platform can't use multiple threads at + all. */ +#if CXX_STD_THREAD + static bool already_warned = false; + if (per_command_time + && !get_run_time_thread_scope_available () + && !already_warned) + { + warning (_("\ +per-thread run time information not available on this platform")); + already_warned = true; + } +#endif +} + +/* See maint.h. */ + +scoped_time_it::scoped_time_it (const char *what, bool enabled) + : m_enabled (enabled), + m_what (what), + m_start_wall (m_enabled + ? std::chrono::steady_clock::now () + : std::chrono::steady_clock::time_point ()) +{ + if (m_enabled) + get_run_time (m_start_user, m_start_sys, run_time_scope::thread); +} + +/* See maint.h. */ + +scoped_time_it::~scoped_time_it () +{ + if (!m_enabled) + return; + + namespace chr = std::chrono; + auto end_wall = chr::steady_clock::now (); + + user_cpu_time_clock::time_point end_user; + system_cpu_time_clock::time_point end_sys; + get_run_time (end_user, end_sys, run_time_scope::thread); + + auto user = end_user - m_start_user; + auto sys = end_sys - m_start_sys; + auto wall = end_wall - m_start_wall; + auto user_ms = chr::duration_cast<chr::milliseconds> (user).count (); + auto sys_ms = chr::duration_cast<chr::milliseconds> (sys).count (); + auto wall_ms = chr::duration_cast<chr::milliseconds> (wall).count (); + auto user_plus_sys_ms = user_ms + sys_ms; + + auto str + = string_printf ("Time for \"%s\": wall %.03f, user %.03f, sys %.03f, " + "user+sys %.03f, %.01f %% CPU\n", + m_what, wall_ms / 1000.0, user_ms / 1000.0, + sys_ms / 1000.0, user_plus_sys_ms / 1000.0, + user_plus_sys_ms * 100.0 / wall_ms); + gdb_stdlog->write_async_safe (str.data (), str.size ()); +} + /* Options affecting the "maintenance selftest" command. */ struct maintenance_selftest_options @@ -1235,9 +1301,7 @@ Selftests have been disabled for this build.\n")); } -void _initialize_maint_cmds (); -void -_initialize_maint_cmds () +INIT_GDB_FILE (maint_cmds) { struct cmd_list_element *cmd; @@ -1379,7 +1443,7 @@ 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, + maintenance_set_command_time_cmd, NULL, &per_command_setlist, &per_command_showlist); add_setshow_boolean_cmd ("space", class_maintenance, |