/* Multi-process/thread control for GDB, the GNU debugger.
- Copyright 1986, 1987, 1988, 1993, 1998
+ Copyright 1986, 1987, 1988, 1993, 1998, 1999, 2000
Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
Free Software Foundation, Inc.
#include <ctype.h>
#include <sys/types.h>
#include <signal.h>
+#ifdef UI_OUT
+#include "ui-out.h"
+#endif
/*#include "lynxos-core.h" */
-struct thread_info
- {
- struct thread_info *next;
- int pid; /* Actual process id */
- int num; /* Convenient handle */
- CORE_ADDR prev_pc; /* State from wait_for_inferior */
- CORE_ADDR prev_func_start;
- char *prev_func_name;
- struct breakpoint *step_resume_breakpoint;
- struct breakpoint *through_sigtramp_breakpoint;
- CORE_ADDR step_range_start;
- CORE_ADDR step_range_end;
- CORE_ADDR step_frame_address;
- int trap_expected;
- int handling_longjmp;
- int another_trap;
-
- /* This is set TRUE when a catchpoint of a shared library event
- triggers. Since we don't wish to leave the inferior in the
- solib hook when we report the event, we step the inferior
- back to user code before stopping and reporting the event.
- */
- int stepping_through_solib_after_catch;
-
- /* When stepping_through_solib_after_catch is TRUE, this is a
- list of the catchpoints that should be reported as triggering
- when we finally do stop stepping.
- */
- bpstat stepping_through_solib_catchpoints;
-
- /* This is set to TRUE when this thread is in a signal handler
- trampoline and we're single-stepping through it */
- int stepping_through_sigtramp;
-
- };
+/* Definition of struct thread_info exported to gdbthread.h */
/* Prototypes for exported functions. */
highest_thread_num = 0;
}
-void
+/* add_thread now returns a pointer to the new thread_info,
+ so that back_ends can initialize their private data. */
+
+struct thread_info *
add_thread (pid)
int pid;
{
tp->stepping_through_solib_catchpoints = NULL;
tp->stepping_through_sigtramp = 0;
tp->next = thread_list;
+ tp->private = NULL;
thread_list = tp;
+ return tp;
}
void
else
thread_list = tp->next;
+ /* NOTE: this will take care of any left-over step_resume breakpoints,
+ but not any user-specified thread-specific breakpoints. */
+ if (tp->step_resume_breakpoint)
+ delete_breakpoint (tp->step_resume_breakpoint);
+
+ /* FIXME: do I ever need to call the back-end to give it a
+ chance at this private data before deleting the thread? */
+ if (tp->private)
+ free (tp->private);
+
free (tp);
return;
return NULL;
}
+/* Find a thread_info by matching 'pid'. */
+struct thread_info *
+find_thread_pid (pid)
+ int pid;
+{
+ struct thread_info *tp;
+
+ for (tp = thread_list; tp; tp = tp->next)
+ if (tp->pid == pid)
+ return tp;
+
+ return NULL;
+}
+
+/*
+ * Thread iterator function.
+ *
+ * Calls a callback function once for each thread, so long as
+ * the callback function returns false. If the callback function
+ * returns true, the iteration will end and the current thread
+ * will be returned. This can be useful for implementing a
+ * search for a thread with arbitrary attributes, or for applying
+ * some operation to every thread.
+ *
+ * FIXME: some of the existing functionality, such as
+ * "Thread apply all", might be rewritten using this functionality.
+ */
+
+struct thread_info *
+iterate_over_threads (callback, data)
+ int (*callback) ();
+ void *data;
+{
+ struct thread_info *tp;
+
+ for (tp = thread_list; tp; tp = tp->next)
+ if ((*callback) (tp, data))
+ return tp;
+
+ return NULL;
+}
+
int
valid_thread_id (num)
int num;
return 0; /* Never heard of 'im */
}
+#ifdef UI_OUT
+/* Print a list of thread ids currently known, and the total number of
+ threads. To be used from within catch_errors. */
+static int
+do_captured_list_thread_ids (void *arg)
+{
+ struct thread_info *tp;
+ int num = 0;
+
+ ui_out_list_begin (uiout, "thread-ids");
+
+ for (tp = thread_list; tp; tp = tp->next)
+ {
+ num++;
+ ui_out_field_int (uiout, "thread-id", tp->num);
+ }
+
+ ui_out_list_end (uiout);
+ ui_out_field_int (uiout, "number-of-threads", num);
+ return GDB_RC_OK;
+}
+
+/* Official gdblib interface function to get a list of thread ids and
+ the total number. */
+enum gdb_rc
+gdb_list_thread_ids (/* output object */)
+{
+ return catch_errors (do_captured_list_thread_ids, NULL,
+ NULL, RETURN_MASK_ALL);
+}
+#endif
/* Load infrun state for the thread PID. */
static void
prune_threads ()
{
- struct thread_info *tp, *tpprev, *next;
+ struct thread_info *tp, *next;
- tpprev = 0;
for (tp = thread_list; tp; tp = next)
{
next = tp->next;
if (!thread_alive (tp))
- {
- if (tpprev)
- tpprev->next = next;
- else
- thread_list = next;
- free (tp);
- }
- else
- tpprev = tp;
+ delete_thread (tp->pid);
}
}
struct frame_info *cur_frame;
int saved_frame_level = selected_frame_level;
int counter;
+ char *extra_info;
/* Avoid coredumps which would happen if we tried to access a NULL
selected_frame. */
printf_filtered (" ");
#ifdef HPUXHPPA
- printf_filtered ("%d %s ", tp->num, target_tid_to_str (tp->pid));
+ printf_filtered ("%d %s", tp->num, target_tid_to_str (tp->pid));
#else
- printf_filtered ("%d %s ", tp->num, target_pid_to_str (tp->pid));
+ printf_filtered ("%d %s", tp->num, target_pid_to_str (tp->pid));
#endif
+
+ extra_info = target_extra_thread_info (tp);
+ if (extra_info)
+ printf_filtered (" (%s)", extra_info);
+ puts_filtered (" ");
+
switch_to_thread (tp->pid);
if (selected_frame)
print_only_stack_frame (selected_frame, -1, 0);
char *tidstr;
int from_tty;
{
- int num;
- struct thread_info *tp;
-
if (!tidstr)
{
/* Don't generate an error, just say which thread is current. */
error ("No stack.");
return;
}
- num = atoi (tidstr);
+
+ gdb_thread_select (tidstr);
+}
+
+static int
+do_captured_thread_select (void *tidstr)
+{
+ int num;
+ struct thread_info *tp;
+
+ num = atoi ((char *)tidstr);
tp = find_thread_id (num);
+#ifdef UI_OUT
+ if (!tp)
+ error ("Thread ID %d not known.", num);
+#else
if (!tp)
error ("Thread ID %d not known. Use the \"info threads\" command to\n\
see the IDs of currently known threads.", num);
+#endif
if (!thread_alive (tp))
error ("Thread ID %d has terminated.\n", num);
switch_to_thread (tp->pid);
- if (context_hook)
- context_hook (num);
-
+#ifdef UI_OUT
+ ui_out_text (uiout, "[Switching to thread ");
+ ui_out_field_int (uiout, "new-thread-id", pid_to_thread_id (inferior_pid));
+ ui_out_text (uiout, " (");
+#if defined(HPUXHPPA)
+ ui_out_text (uiout, target_tid_to_str (inferior_pid));
+#else
+ ui_out_text (uiout, target_pid_to_str (inferior_pid));
+#endif
+ ui_out_text (uiout, ")]");
+#else /* UI_OUT */
printf_filtered ("[Switching to thread %d (%s)]\n",
pid_to_thread_id (inferior_pid),
#if defined(HPUXHPPA)
target_pid_to_str (inferior_pid)
#endif
);
+#endif /* UI_OUT */
+
print_stack_frame (selected_frame, selected_frame_level, 1);
+ return GDB_RC_OK;
+}
+
+enum gdb_rc
+gdb_thread_select (char *tidstr)
+{
+ return catch_errors (do_captured_thread_select, tidstr,
+ NULL, RETURN_MASK_ALL);
}
/* Commands with a prefix of `thread'. */
projects / deliverable / binutils-gdb.git / blobdiff