X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=gdb%2Fthread.c;h=6ad1807db83247e89b499c44984e5f8702e1505d;hb=8fbca658f0643a6c3d5b61840351ae70e5bf2db6;hp=2fdc7f9b326fc47eba28b44b7d6a4796885329ae;hpb=6aed2dbcba548376cdc0b98231fb9b174f9ca978;p=binutils-gdb.git diff --git a/gdb/thread.c b/gdb/thread.c index 2fdc7f9b326..6ad1807db83 100644 --- a/gdb/thread.c +++ b/gdb/thread.c @@ -1,7 +1,7 @@ /* Multi-process/thread control for GDB, the GNU debugger. Copyright (C) 1986, 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998, 1999, - 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009, 2010 + 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA. @@ -43,14 +43,16 @@ #include "observer.h" #include "annotate.h" #include "cli/cli-decode.h" +#include "gdb_regex.h" +#include "cli/cli-utils.h" -/* Definition of struct thread_info exported to gdbthread.h */ +/* Definition of struct thread_info exported to gdbthread.h. */ -/* Prototypes for exported functions. */ +/* Prototypes for exported functions. */ void _initialize_thread (void); -/* Prototypes for local functions. */ +/* Prototypes for local functions. */ static struct thread_info *thread_list = NULL; static int highest_thread_num; @@ -83,10 +85,20 @@ inferior_thread (void) void delete_step_resume_breakpoint (struct thread_info *tp) { - if (tp && tp->step_resume_breakpoint) + if (tp && tp->control.step_resume_breakpoint) { - delete_breakpoint (tp->step_resume_breakpoint); - tp->step_resume_breakpoint = NULL; + delete_breakpoint (tp->control.step_resume_breakpoint); + tp->control.step_resume_breakpoint = NULL; + } +} + +void +delete_exception_resume_breakpoint (struct thread_info *tp) +{ + if (tp && tp->control.exception_resume_breakpoint) + { + delete_breakpoint (tp->control.exception_resume_breakpoint); + tp->control.exception_resume_breakpoint = NULL; } } @@ -97,16 +109,25 @@ clear_thread_inferior_resources (struct thread_info *tp) but not any user-specified thread-specific breakpoints. We can not delete the breakpoint straight-off, because the inferior might not be stopped at the moment. */ - if (tp->step_resume_breakpoint) + if (tp->control.step_resume_breakpoint) { - tp->step_resume_breakpoint->disposition = disp_del_at_next_stop; - tp->step_resume_breakpoint = NULL; + tp->control.step_resume_breakpoint->disposition = disp_del_at_next_stop; + tp->control.step_resume_breakpoint = NULL; } - bpstat_clear (&tp->stop_bpstat); + if (tp->control.exception_resume_breakpoint) + { + tp->control.exception_resume_breakpoint->disposition + = disp_del_at_next_stop; + tp->control.exception_resume_breakpoint = NULL; + } + + bpstat_clear (&tp->control.stop_bpstat); discard_all_intermediate_continuations_thread (tp); discard_all_continuations_thread (tp); + + delete_longjmp_breakpoint (tp->num); } static void @@ -122,6 +143,7 @@ free_thread (struct thread_info *tp) xfree (tp->private); } + xfree (tp->name); xfree (tp); } @@ -187,11 +209,11 @@ add_thread_silent (ptid_t ptid) if (ptid_equal (inferior_ptid, ptid)) { - tp = new_thread (ptid); + tp = new_thread (null_ptid); /* Make switch_to_thread not read from the thread. */ tp->state_ = THREAD_EXITED; - switch_to_thread (minus_one_ptid); + switch_to_thread (null_ptid); /* Now we can delete it. */ delete_thread (ptid); @@ -413,7 +435,7 @@ in_thread_list (ptid_t ptid) if (ptid_equal (tp->ptid, ptid)) return 1; - return 0; /* Never heard of 'im */ + return 0; /* Never heard of 'im. */ } /* Finds the first thread of the inferior given by PID. If PID is -1, @@ -463,7 +485,7 @@ any_live_thread_of_process (int pid) } /* Print a list of thread ids currently known, and the total number of - threads. To be used from within catch_errors. */ + threads. To be used from within catch_errors. */ static int do_captured_list_thread_ids (struct ui_out *uiout, void *arg) { @@ -497,7 +519,7 @@ do_captured_list_thread_ids (struct ui_out *uiout, void *arg) } /* Official gdblib interface function to get a list of thread ids and - the total number. */ + the total number. */ enum gdb_rc gdb_list_thread_ids (struct ui_out *uiout, char **error_message) { @@ -507,7 +529,7 @@ gdb_list_thread_ids (struct ui_out *uiout, char **error_message) return GDB_RC_OK; } -/* Return true if TP is an active thread. */ +/* Return true if TP is an active thread. */ static int thread_alive (struct thread_info *tp) { @@ -734,23 +756,23 @@ finish_thread_state_cleanup (void *arg) } /* Prints the list of threads and their details on UIOUT. - This is a version of 'info_thread_command' suitable for - use from MI. + This is a version of 'info_threads_command' suitable for + use from MI. If REQUESTED_THREAD is not -1, it's the GDB id of the thread that should be printed. Otherwise, all threads are - printed. + printed. If PID is not -1, only print threads from the process PID. - Otherwise, threads from all attached PIDs are printed. + Otherwise, threads from all attached PIDs are printed. If both REQUESTED_THREAD and PID are not -1, then the thread is printed if it belongs to the specified process. Otherwise, an error is raised. */ void -print_thread_info (struct ui_out *uiout, int requested_thread, int pid) +print_thread_info (struct ui_out *uiout, char *requested_threads, int pid) { struct thread_info *tp; ptid_t current_ptid; struct cleanup *old_chain; - char *extra_info; + char *extra_info, *name, *target_id; int current_thread = -1; update_thread_list (); @@ -759,18 +781,60 @@ print_thread_info (struct ui_out *uiout, int requested_thread, int pid) /* We'll be switching threads temporarily. */ old_chain = make_cleanup_restore_current_thread (); - make_cleanup_ui_out_list_begin_end (uiout, "threads"); + /* For backward compatibility, we make a list for MI. A table is + preferable for the CLI, though, because it shows table + headers. */ + if (ui_out_is_mi_like_p (uiout)) + make_cleanup_ui_out_list_begin_end (uiout, "threads"); + else + { + int n_threads = 0; + + for (tp = thread_list; tp; tp = tp->next) + { + if (!number_is_in_list (requested_threads, tp->num)) + continue; + + if (pid != -1 && PIDGET (tp->ptid) != pid) + continue; + + if (tp->state_ == THREAD_EXITED) + continue; + + ++n_threads; + } + + if (n_threads == 0) + { + if (requested_threads == NULL || *requested_threads == '\0') + ui_out_message (uiout, 0, _("No threads.\n")); + else + ui_out_message (uiout, 0, _("No threads match '%s'.\n"), + requested_threads); + do_cleanups (old_chain); + return; + } + + make_cleanup_ui_out_table_begin_end (uiout, 4, n_threads, "threads"); + + ui_out_table_header (uiout, 1, ui_left, "current", ""); + ui_out_table_header (uiout, 4, ui_left, "id", "Id"); + ui_out_table_header (uiout, 17, ui_left, "target-id", "Target Id"); + ui_out_table_header (uiout, 1, ui_left, "frame", "Frame"); + ui_out_table_body (uiout); + } + for (tp = thread_list; tp; tp = tp->next) { struct cleanup *chain2; int core; - if (requested_thread != -1 && tp->num != requested_thread) + if (!number_is_in_list (requested_threads, tp->num)) continue; if (pid != -1 && PIDGET (tp->ptid) != pid) { - if (requested_thread != -1) + if (requested_threads != NULL && *requested_threads != '\0') error (_("Requested thread not found in requested process")); continue; } @@ -783,23 +847,62 @@ print_thread_info (struct ui_out *uiout, int requested_thread, int pid) chain2 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); - if (ptid_equal (tp->ptid, current_ptid)) - ui_out_text (uiout, "* "); + if (ui_out_is_mi_like_p (uiout)) + { + /* Compatibility. */ + if (ptid_equal (tp->ptid, current_ptid)) + ui_out_text (uiout, "* "); + else + ui_out_text (uiout, " "); + } else - ui_out_text (uiout, " "); + { + if (ptid_equal (tp->ptid, current_ptid)) + ui_out_field_string (uiout, "current", "*"); + else + ui_out_field_skip (uiout, "current"); + } ui_out_field_int (uiout, "id", tp->num); - ui_out_text (uiout, " "); - ui_out_field_string (uiout, "target-id", target_pid_to_str (tp->ptid)); + /* For the CLI, we stuff everything into the target-id field. + This is a gross hack to make the output come out looking + correct. The underlying problem here is that ui-out has no + way to specify that a field's space allocation should be + shared by several fields. For MI, we do the right thing + instead. */ + + target_id = target_pid_to_str (tp->ptid); extra_info = target_extra_thread_info (tp); - if (extra_info) + name = tp->name ? tp->name : target_thread_name (tp); + + if (ui_out_is_mi_like_p (uiout)) { - ui_out_text (uiout, " ("); - ui_out_field_string (uiout, "details", extra_info); - ui_out_text (uiout, ")"); + ui_out_field_string (uiout, "target-id", target_id); + if (extra_info) + ui_out_field_string (uiout, "details", extra_info); + if (name) + ui_out_field_string (uiout, "name", name); + } + else + { + struct cleanup *str_cleanup; + char *contents; + + if (extra_info && name) + contents = xstrprintf ("%s \"%s\" (%s)", target_id, + name, extra_info); + else if (extra_info) + contents = xstrprintf ("%s (%s)", target_id, extra_info); + else if (name) + contents = xstrprintf ("%s \"%s\"", target_id, name); + else + contents = xstrdup (target_id); + str_cleanup = make_cleanup (xfree, contents); + + ui_out_field_string (uiout, "target-id", contents); + do_cleanups (str_cleanup); } - ui_out_text (uiout, " "); if (tp->state_ == THREAD_RUNNING) ui_out_text (uiout, "(running)\n"); @@ -834,7 +937,7 @@ print_thread_info (struct ui_out *uiout, int requested_thread, int pid) the "info threads" command. */ do_cleanups (old_chain); - if (pid == -1 && requested_thread == -1) + if (pid == -1 && requested_threads == NULL) { gdb_assert (current_thread != -1 || !thread_list @@ -854,21 +957,21 @@ No selected thread. See `help thread'.\n"); } } - /* Print information about currently known threads - * Note: this has the drawback that it _really_ switches - * threads, which frees the frame cache. A no-side - * effects info-threads command would be nicer. - */ + Optional ARG is a thread id, or list of thread ids. + + Note: this has the drawback that it _really_ switches + threads, which frees the frame cache. A no-side + effects info-threads command would be nicer. */ static void info_threads_command (char *arg, int from_tty) { - print_thread_info (uiout, -1, -1); + print_thread_info (uiout, arg, -1); } -/* Switch from one thread to another. */ +/* Switch from one thread to another. */ void switch_to_thread (ptid_t ptid) @@ -916,6 +1019,13 @@ restore_selected_frame (struct frame_id a_frame_id, int frame_level) struct frame_info *frame = NULL; int count; + /* This means there was no selected frame. */ + if (frame_level == -1) + { + select_frame (NULL); + return; + } + gdb_assert (frame_level >= 0); /* Restore by level first, check if the frame id is the same as @@ -952,8 +1062,8 @@ restore_selected_frame (struct frame_id a_frame_id, int frame_level) /* Warn the user. */ if (frame_level > 0 && !ui_out_is_mi_like_p (uiout)) { - warning (_("\ -Couldn't restore frame #%d in current thread, at reparsed frame #0\n"), + warning (_("Couldn't restore frame #%d in " + "current thread, at reparsed frame #0\n"), frame_level); /* For MI, we should probably have a notification about current frame change. But this error is not very @@ -1034,7 +1144,14 @@ make_cleanup_restore_current_thread (void) && target_has_registers && target_has_stack && target_has_memory) - frame = get_selected_frame (NULL); + { + /* When processing internal events, there might not be a + selected frame. If we naively call get_selected_frame + here, then we can end up reading debuginfo for the + current frame, but we don't generally need the debuginfo + at this point. */ + frame = get_selected_frame_if_set (); + } else frame = NULL; @@ -1056,8 +1173,7 @@ make_cleanup_restore_current_thread (void) thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4 thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9 - thread apply all p x/i $pc Apply x/i $pc cmd to all threads - */ + thread apply all p x/i $pc Apply x/i $pc cmd to all threads. */ static void thread_apply_all_command (char *cmd, int from_tty) @@ -1074,7 +1190,7 @@ thread_apply_all_command (char *cmd, int from_tty) old_chain = make_cleanup_restore_current_thread (); /* Save a copy of the command in case it is clobbered by - execute_command */ + execute_command. */ saved_cmd = xstrdup (cmd); make_cleanup (xfree, saved_cmd); for (tp = thread_list; tp; tp = tp->next) @@ -1085,7 +1201,8 @@ thread_apply_all_command (char *cmd, int from_tty) printf_filtered (_("\nThread %d (%s):\n"), tp->num, target_pid_to_str (inferior_ptid)); execute_command (cmd, from_tty); - strcpy (cmd, saved_cmd); /* Restore exact command used previously */ + strcpy (cmd, saved_cmd); /* Restore exact command used + previously. */ } do_cleanups (old_chain); @@ -1095,9 +1212,9 @@ static void thread_apply_command (char *tidlist, int from_tty) { char *cmd; - char *p; struct cleanup *old_chain; char *saved_cmd; + struct get_number_or_range_state state; if (tidlist == NULL || *tidlist == '\000') error (_("Please specify a thread ID list")); @@ -1108,57 +1225,37 @@ thread_apply_command (char *tidlist, int from_tty) error (_("Please specify a command following the thread ID list")); /* Save a copy of the command in case it is clobbered by - execute_command */ + execute_command. */ saved_cmd = xstrdup (cmd); old_chain = make_cleanup (xfree, saved_cmd); - while (tidlist < cmd) + + init_number_or_range (&state, tidlist); + while (!state.finished && state.string < cmd) { struct thread_info *tp; - int start, end; - - start = strtol (tidlist, &p, 10); - if (p == tidlist) - error (_("Error parsing %s"), tidlist); - tidlist = p; + int start; + char *p = tidlist; - while (*tidlist == ' ' || *tidlist == '\t') - tidlist++; - - if (*tidlist == '-') /* Got a range of IDs? */ - { - tidlist++; /* Skip the - */ - end = strtol (tidlist, &p, 10); - if (p == tidlist) - error (_("Error parsing %s"), tidlist); - tidlist = p; - - while (*tidlist == ' ' || *tidlist == '\t') - tidlist++; - } - else - end = start; + start = get_number_or_range (&state); make_cleanup_restore_current_thread (); - for (; start <= end; start++) - { - tp = find_thread_id (start); + tp = find_thread_id (start); - if (!tp) - warning (_("Unknown thread %d."), start); - else if (!thread_alive (tp)) - warning (_("Thread %d has terminated."), start); - else - { - switch_to_thread (tp->ptid); + if (!tp) + warning (_("Unknown thread %d."), start); + else if (!thread_alive (tp)) + warning (_("Thread %d has terminated."), start); + else + { + switch_to_thread (tp->ptid); - printf_filtered (_("\nThread %d (%s):\n"), tp->num, - target_pid_to_str (inferior_ptid)); - execute_command (cmd, from_tty); + printf_filtered (_("\nThread %d (%s):\n"), tp->num, + target_pid_to_str (inferior_ptid)); + execute_command (cmd, from_tty); - /* Restore exact command used previously. */ - strcpy (cmd, saved_cmd); - } + /* Restore exact command used previously. */ + strcpy (cmd, saved_cmd); } } @@ -1195,14 +1292,86 @@ thread_command (char *tidstr, int from_tty) gdb_thread_select (uiout, tidstr, NULL); } +/* Implementation of `thread name'. */ + +static void +thread_name_command (char *arg, int from_tty) +{ + struct thread_info *info; + + if (ptid_equal (inferior_ptid, null_ptid)) + error (_("No thread selected")); + + while (arg && isspace (*arg)) + ++arg; + + info = inferior_thread (); + xfree (info->name); + info->name = arg ? xstrdup (arg) : NULL; +} + +/* Find thread ids with a name, target pid, or extra info matching ARG. */ + +static void +thread_find_command (char *arg, int from_tty) +{ + struct thread_info *tp; + char *tmp; + unsigned long match = 0; + + if (arg == NULL || *arg == '\0') + error (_("Command requires an argument.")); + + tmp = re_comp (arg); + if (tmp != 0) + error (_("Invalid regexp (%s): %s"), tmp, arg); + + update_thread_list (); + for (tp = thread_list; tp; tp = tp->next) + { + if (tp->name != NULL && re_exec (tp->name)) + { + printf_filtered (_("Thread %d has name '%s'\n"), + tp->num, tp->name); + match++; + } + + tmp = target_thread_name (tp); + if (tmp != NULL && re_exec (tmp)) + { + printf_filtered (_("Thread %d has target name '%s'\n"), + tp->num, tmp); + match++; + } + + tmp = target_pid_to_str (tp->ptid); + if (tmp != NULL && re_exec (tmp)) + { + printf_filtered (_("Thread %d has target id '%s'\n"), + tp->num, tmp); + match++; + } + + tmp = target_extra_thread_info (tp); + if (tmp != NULL && re_exec (tmp)) + { + printf_filtered (_("Thread %d has extra info '%s'\n"), + tp->num, tmp); + match++; + } + } + if (!match) + printf_filtered (_("No threads match '%s'\n"), arg); +} + /* Print notices when new threads are attached and detached. */ int print_thread_events = 1; static void show_print_thread_events (struct ui_file *file, int from_tty, struct cmd_list_element *c, const char *value) { - fprintf_filtered (file, _("\ -Printing of thread events is %s.\n"), + fprintf_filtered (file, + _("Printing of thread events is %s.\n"), value); } @@ -1237,7 +1406,10 @@ do_captured_thread_select (struct ui_out *uiout, void *tidstr) if (tp->state_ == THREAD_RUNNING) ui_out_text (uiout, "(running)\n"); else - print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); + { + ui_out_text (uiout, "\n"); + print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); + } /* Since the current thread may have changed, see if there is any exited thread we can now delete. */ @@ -1282,8 +1454,11 @@ _initialize_thread (void) { static struct cmd_list_element *thread_apply_list = NULL; - add_info ("threads", info_threads_command, - _("IDs of currently known threads.")); + add_info ("threads", info_threads_command, + _("Display currently known threads.\n\ +Usage: info threads [ID]...\n\ +Optional arguments are thread IDs with spaces between.\n\ +If no arguments, all threads are displayed.")); add_prefix_cmd ("thread", class_run, thread_command, _("\ Use this command to switch between threads.\n\ @@ -1297,6 +1472,17 @@ The new thread ID must be currently known."), add_cmd ("all", class_run, thread_apply_all_command, _("Apply a command to all threads."), &thread_apply_list); + add_cmd ("name", class_run, thread_name_command, + _("Set the current thread's name.\n\ +Usage: thread name [NAME]\n\ +If NAME is not given, then any existing name is removed."), &thread_cmd_list); + + add_cmd ("find", class_run, thread_find_command, _("\ +Find threads that match a regular expression.\n\ +Usage: thread find REGEXP\n\ +Will display thread ids whose name, target ID, or extra info matches REGEXP."), + &thread_cmd_list); + if (!xdb_commands) add_com_alias ("t", "thread", class_run, 1);