/* Multi-process/thread control for GDB, the GNU debugger.
- Copyright 1986, 1987, 1988, 1993
+ Copyright 1986, 1987, 1988, 1993, 1998
Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
Free Software Foundation, Inc.
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;
+
};
+/* Prototypes for exported functions. */
+
+void _initialize_thread PARAMS ((void));
+
+/* Prototypes for local functions. */
+
+#if !defined(FIND_NEW_THREADS)
+#define FIND_NEW_THREADS target_find_new_threads
+#endif
+
static struct thread_info *thread_list = NULL;
static int highest_thread_num;
-static void thread_command PARAMS ((char * tidstr, int from_tty));
+static struct thread_info * find_thread_id PARAMS ((int num));
+static void thread_command PARAMS ((char * tidstr, int from_tty));
+static void thread_apply_all_command PARAMS ((char *, int));
+static int thread_alive PARAMS ((struct thread_info *));
+static void info_threads_command PARAMS ((char *, int));
+static void thread_apply_command PARAMS ((char *, int));
+static void restore_current_thread PARAMS ((int));
+static void switch_to_thread PARAMS ((int pid));
static void prune_threads PARAMS ((void));
-static void thread_switch PARAMS ((int pid));
+/* If the host has threads, the host machine definition may set this
+ macro. But, for remote thread debugging, it gets more complex and
+ setting macros does not bind to the various target dependent
+ methods well. So, we use the vector target_thread_functions */
-static struct thread_info * find_thread_id PARAMS ((int num));
+static struct target_thread_vector *target_thread_functions;
+
+int
+target_find_new_threads ()
+{
+ int retval = 0;
+ if (target_thread_functions &&
+ target_thread_functions->find_new_threads)
+ retval = (*(target_thread_functions->find_new_threads)) ();
+ return retval; /* no support */
+}
+
+
+int
+target_get_thread_info PARAMS ((gdb_threadref * ref,
+ int selection, /* FIXME: Selection */
+ struct gdb_ext_thread_info * info));
+
+int
+target_get_thread_info (ref, selection, info)
+
+ gdb_threadref *ref;
+ int selection;
+ /* FIXME: Selection */
+ struct gdb_ext_thread_info *info;
+
+{
+ int retval = 0;
+ if (target_thread_functions
+ && target_thread_functions->get_thread_info)
+ retval = (*(target_thread_functions->get_thread_info)) (ref, selection, info);
+ return retval;
+}
+
+
+/* It is possible that these bind and unbinf functions implement a
+ stack the interface allows it, but its not implemented that way
+ */
+
+
+void
+bind_target_thread_vector (vec)
+ struct target_thread_vector *vec;
+{
+ target_thread_functions = vec;
+}
+
+struct target_thread_vector *
+unbind_target_thread_vector ()
+{
+ struct target_thread_vector *retval;
+ retval = target_thread_functions;
+ target_thread_functions = 0;
+ return retval;
+} /* unbind_target_thread-vector */
void
init_thread_list ()
tp->handling_longjmp = 0;
tp->trap_expected = 0;
tp->another_trap = 0;
+ tp->stepping_through_solib_after_catch = 0;
+ tp->stepping_through_solib_catchpoints = NULL;
+ tp->stepping_through_sigtramp = 0;
tp->next = thread_list;
thread_list = tp;
}
+void
+delete_thread (pid)
+ int pid;
+{
+ struct thread_info *tp, *tpprev;
+
+ tpprev = NULL;
+
+ for (tp = thread_list; tp; tpprev = tp, tp = tp->next)
+ if (tp->pid == pid)
+ break;
+
+ if (!tp)
+ return;
+
+ if (tpprev)
+ tpprev->next = tp->next;
+ else
+ thread_list = tp->next;
+
+ free (tp);
+
+ return;
+}
+
static struct thread_info *
find_thread_id (num)
int num;
return 0;
}
+int
+thread_id_to_pid (num)
+ int num;
+{
+ struct thread_info *thread = find_thread_id (num);
+ if (thread)
+ return thread->pid;
+ else
+ return -1;
+}
+
int
in_thread_list (pid)
int pid;
trap_expected, step_resume_breakpoint,
through_sigtramp_breakpoint, step_range_start,
step_range_end, step_frame_address,
- handling_longjmp, another_trap)
+ handling_longjmp, another_trap,
+ stepping_through_solib_after_catch,
+ stepping_through_solib_catchpoints,
+ stepping_through_sigtramp)
int pid;
CORE_ADDR *prev_pc;
CORE_ADDR *prev_func_start;
CORE_ADDR *step_frame_address;
int *handling_longjmp;
int *another_trap;
+ int * stepping_through_solib_after_catch;
+ bpstat * stepping_through_solib_catchpoints;
+ int * stepping_through_sigtramp;
{
struct thread_info *tp;
*handling_longjmp = tp->handling_longjmp;
*trap_expected = tp->trap_expected;
*another_trap = tp->another_trap;
+ *stepping_through_solib_after_catch = tp->stepping_through_solib_after_catch;
+ *stepping_through_solib_catchpoints = tp->stepping_through_solib_catchpoints;
+ *stepping_through_sigtramp = tp->stepping_through_sigtramp;
}
/* Save infrun state for the thread PID. */
trap_expected, step_resume_breakpoint,
through_sigtramp_breakpoint, step_range_start,
step_range_end, step_frame_address,
- handling_longjmp, another_trap)
+ handling_longjmp, another_trap,
+ stepping_through_solib_after_catch,
+ stepping_through_solib_catchpoints,
+ stepping_through_sigtramp)
int pid;
CORE_ADDR prev_pc;
CORE_ADDR prev_func_start;
CORE_ADDR step_frame_address;
int handling_longjmp;
int another_trap;
+ int stepping_through_solib_after_catch;
+ bpstat stepping_through_solib_catchpoints;
+ int stepping_through_sigtramp;
{
struct thread_info *tp;
tp->handling_longjmp = handling_longjmp;
tp->trap_expected = trap_expected;
tp->another_trap = another_trap;
+ tp->stepping_through_solib_after_catch = stepping_through_solib_after_catch;
+ tp->stepping_through_solib_catchpoints = stepping_through_solib_catchpoints;
+ tp->stepping_through_sigtramp = stepping_through_sigtramp;
+}
+
+/* Return true if TP is an active thread. */
+static int
+thread_alive (tp)
+ struct thread_info *tp;
+{
+ if (tp->pid == -1)
+ return 0;
+ if (! target_thread_alive (tp->pid))
+ {
+ tp->pid = -1; /* Mark it as dead */
+ return 0;
+ }
+ return 1;
}
static void
prune_threads ()
{
- struct thread_info *tp, *tpprev;
+ struct thread_info *tp, *tpprev, *next;
tpprev = 0;
-
- for (tp = thread_list; tp; tp = tp->next)
- if (tp->pid == -1)
- {
- if (tpprev)
- tpprev->next = tp->next;
- else
- thread_list = NULL;
-
- free (tp);
- }
- else
- tpprev = tp;
+ 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;
+ }
}
-/* Print information about currently known threads */
+/* 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.
+ */
static void
info_threads_command (arg, from_tty)
int from_tty;
{
struct thread_info *tp;
- int current_pid = inferior_pid;
+ int current_pid;
+ struct frame_info *cur_frame;
+ int saved_frame_level = selected_frame_level;
+ int counter;
/* Avoid coredumps which would happen if we tried to access a NULL
selected_frame. */
if (!target_has_stack) error ("No stack.");
+ prune_threads ();
+#if defined(FIND_NEW_THREADS)
+ FIND_NEW_THREADS ();
+#endif
+ current_pid = inferior_pid;
for (tp = thread_list; tp; tp = tp->next)
{
- if (! target_thread_alive (tp->pid))
- {
- tp->pid = -1; /* Mark it as dead */
- continue;
- }
-
if (tp->pid == current_pid)
printf_filtered ("* ");
else
printf_filtered (" ");
+#ifdef HPUXHPPA
+ 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));
+#endif
+ switch_to_thread (tp->pid);
+ if (selected_frame)
+ print_only_stack_frame (selected_frame, -1, 0);
+ else
+ printf_filtered ("[No stack.]\n");
+ }
- thread_switch (tp->pid);
+ switch_to_thread (current_pid);
+
+ /* Code below copied from "up_silently_base" in "stack.c".
+ * It restores the frame set by the user before the "info threads"
+ * command. We have finished the info-threads display by switching
+ * back to the current thread. That switch has put us at the top
+ * of the stack (leaf frame).
+ */
+ counter = saved_frame_level;
+ cur_frame = find_relative_frame(selected_frame, &counter);
+ if (counter != 0)
+ {
+ /* Ooops, can't restore, tell user where we are. */
+ warning ("Couldn't restore frame in current thread, at frame 0");
print_stack_frame (selected_frame, -1, 0);
}
+ else
+ {
+ select_frame(cur_frame, saved_frame_level);
+ }
- thread_switch (current_pid);
- prune_threads ();
+ /* re-show current frame. */
+ show_stack_frame(cur_frame);
}
/* Switch from one thread to another. */
static void
-thread_switch (pid)
+switch_to_thread (pid)
int pid;
{
if (pid == inferior_pid)
restore_current_thread (pid)
int pid;
{
- if (pid != inferior_pid)
- thread_switch (pid);
+ if (pid != inferior_pid)
+ {
+ switch_to_thread (pid);
+ print_stack_frame( get_current_frame(), 0, -1);
+ }
}
/* Apply a GDB command to a list of threads. List syntax is a whitespace
if (cmd == NULL || *cmd == '\000')
error ("Please specify a command following the thread ID list");
- old_chain = make_cleanup (restore_current_thread, inferior_pid);
+ old_chain = make_cleanup ((make_cleanup_func) restore_current_thread,
+ (void *) inferior_pid);
for (tp = thread_list; tp; tp = tp->next)
- {
- thread_switch (tp->pid);
- printf_filtered ("\nThread %d (%s):\n", tp->num,
- target_pid_to_str (inferior_pid));
- execute_command (cmd, from_tty);
- }
+ if (thread_alive (tp))
+ {
+ switch_to_thread (tp->pid);
+#ifdef HPUXHPPA
+ printf_filtered ("\nThread %d (%s):\n",
+ tp->num,
+ target_tid_to_str (inferior_pid));
+#else
+ printf_filtered ("\nThread %d (%s):\n", tp->num,
+ target_pid_to_str (inferior_pid));
+#endif
+ execute_command (cmd, from_tty);
+ }
}
static void
if (*cmd == '\000')
error ("Please specify a command following the thread ID list");
- old_chain = make_cleanup (restore_current_thread, inferior_pid);
+ old_chain = make_cleanup ((make_cleanup_func) restore_current_thread,
+ (void *) inferior_pid);
while (tidlist < cmd)
{
tp = find_thread_id (start);
if (!tp)
+ warning ("Unknown thread %d.", start);
+ else if (!thread_alive (tp))
+ warning ("Thread %d has terminated.", start);
+ else
{
- warning ("Unknown thread %d.", start);
- continue;
+ switch_to_thread (tp->pid);
+#ifdef HPUXHPPA
+ printf_filtered ("\nThread %d (%s):\n", tp->num,
+ target_tid_to_str (inferior_pid));
+#else
+ printf_filtered ("\nThread %d (%s):\n", tp->num,
+ target_pid_to_str (inferior_pid));
+#endif
+ execute_command (cmd, from_tty);
}
-
- thread_switch (tp->pid);
- printf_filtered ("\nThread %d (%s):\n", tp->num,
- target_pid_to_str (inferior_pid));
- execute_command (cmd, from_tty);
}
}
}
struct thread_info *tp;
if (!tidstr)
- error ("Please specify a thread ID. Use the \"info threads\" command to\n\
-see the IDs of currently known threads.");
-
+ {
+ /* Don't generate an error, just say which thread is current. */
+ if (target_has_stack)
+ printf_filtered ("[Current thread is %d (%s)]\n",
+ pid_to_thread_id(inferior_pid),
+#if defined(HPUXHPPA)
+ target_tid_to_str(inferior_pid)
+#else
+ target_pid_to_str(inferior_pid)
+#endif
+ );
+ else
+ error ("No stack.");
+ return;
+ }
num = atoi (tidstr);
tp = find_thread_id (num);
error ("Thread ID %d not known. Use the \"info threads\" command to\n\
see the IDs of currently known threads.", num);
- thread_switch (tp->pid);
+ if (!thread_alive (tp))
+ error ("Thread ID %d has terminated.\n", num);
+
+ switch_to_thread (tp->pid);
- printf_filtered ("[Switching to %s]\n", target_pid_to_str (inferior_pid));
+ if (context_hook)
+ context_hook (num);
+
+ printf_filtered ("[Switching to thread %d (%s)]\n",
+ pid_to_thread_id (inferior_pid),
+#if defined(HPUXHPPA)
+ target_tid_to_str (inferior_pid)
+#else
+ target_pid_to_str (inferior_pid)
+#endif
+ );
print_stack_frame (selected_frame, selected_frame_level, 1);
}
+/* Commands with a prefix of `thread'. */
+struct cmd_list_element *thread_cmd_list = NULL;
+
void
_initialize_thread ()
{
- static struct cmd_list_element *thread_cmd_list = NULL;
static struct cmd_list_element *thread_apply_list = NULL;
extern struct cmd_list_element *cmdlist;
"Apply a command to all threads.",
&thread_apply_list);
- add_com_alias ("t", "thread", class_run, 1);
+ if (!xdb_commands)
+ add_com_alias ("t", "thread", class_run, 1);
}
projects / thirdparty / binutils-gdb.git / blobdiff