int stop_soon_quietly;
-/* Nonzero if pc has been changed by the debugger
- since the inferior stopped. */
-
-int pc_changed;
-
/* Nonzero if proceed is being used for a "finish" command or a similar
situation when stop_registers should be saved. */
DO_DEFERRED_STORES;
#endif
- target_resume (step, sig);
+ target_resume (inferior_pid, step, sig);
discard_cleanups (old_cleanups);
}
step one instruction before inserting breakpoints
so that we do not stop right away. */
- if (!pc_changed && breakpoint_here_p (read_pc ()))
+ if (breakpoint_here_p (read_pc ()))
oneproc = 1;
}
else
WAITTYPE w;
int another_trap;
int random_signal;
- CORE_ADDR stop_sp;
+ CORE_ADDR stop_sp = 0;
CORE_ADDR stop_func_start;
char *stop_func_name;
- CORE_ADDR prologue_pc, tmp;
+ CORE_ADDR prologue_pc = 0, tmp;
struct symtab_and_line sal;
int remove_breakpoints_on_following_step = 0;
int current_line;
int handling_longjmp = 0; /* FIXME */
- struct symtab *symtab;
struct breakpoint *step_resume_breakpoint = NULL;
+ int pid;
old_cleanups = make_cleanup (delete_breakpoint_current_contents,
&step_resume_breakpoint);
while (1)
{
/* Clean up saved state that will become invalid. */
- pc_changed = 0;
flush_cached_frames ();
registers_changed ();
- target_wait (&w);
+ pid = target_wait (&w);
#ifdef SIGTRAP_STOP_AFTER_LOAD
break;
}
+ if (pid != inferior_pid)
+ {
+ int printed = 0;
+
+ if (!in_thread_list (pid))
+ {
+ fprintf (stderr, "[New %s]\n", target_pid_to_str (pid));
+ add_thread (pid);
+
+ target_resume (pid, 0, 0);
+ continue;
+ }
+ else
+ {
+ stop_signal = WSTOPSIG (w);
+
+ if (stop_signal >= NSIG || signal_print[stop_signal])
+ {
+ char *signame;
+
+ printed = 1;
+ target_terminal_ours_for_output ();
+ printf_filtered ("\nProgram received signal ");
+ signame = strsigno (stop_signal);
+ if (signame == NULL)
+ printf_filtered ("%d", stop_signal);
+ else
+ printf_filtered ("%s (%d)", signame, stop_signal);
+ printf_filtered (", %s\n", safe_strsignal (stop_signal));
+
+ fflush (stdout);
+ }
+
+ if (stop_signal >= NSIG || signal_stop[stop_signal])
+ {
+ inferior_pid = pid;
+ printf_filtered ("[Switching to %s]\n", target_pid_to_str (pid));
+
+ flush_cached_frames ();
+ registers_changed ();
+ trap_expected = 0;
+ if (step_resume_breakpoint)
+ {
+ delete_breakpoint (step_resume_breakpoint);
+ step_resume_breakpoint = NULL;
+ }
+ prev_pc = 0;
+ prev_sp = 0;
+ prev_func_name = NULL;
+ step_range_start = 0;
+ step_range_end = 0;
+ step_frame_address = 0;
+ handling_longjmp = 0;
+ another_trap = 0;
+ }
+ else
+ {
+ if (printed)
+ target_terminal_inferior ();
+
+ /* Clear the signal if it should not be passed. */
+ if (signal_program[stop_signal] == 0)
+ stop_signal = 0;
+
+ target_resume (pid, 0, stop_signal);
+ continue;
+ }
+ }
+ }
+
#ifdef NO_SINGLE_STEP
if (one_stepped)
single_step (0); /* This actually cleans up the ss */
}
stop_pc = read_pc ();
- set_current_frame ( create_new_frame (read_fp (),
- read_pc ()));
+ set_current_frame ( create_new_frame (read_fp (), stop_pc));
stop_frame_address = FRAME_FP (get_current_frame ());
stop_sp = read_sp ();
stop_func_name = 0;
/* Don't care about return value; stop_func_start and stop_func_name
will both be 0 if it doesn't work. */
- find_pc_partial_function (stop_pc, &stop_func_name, &stop_func_start);
+ find_pc_partial_function (stop_pc, &stop_func_name, &stop_func_start,
+ (CORE_ADDR *)NULL);
stop_func_start += FUNCTION_START_OFFSET;
another_trap = 0;
bpstat_clear (&stop_bpstat);
struct inferior_status *inf_status;
int restore_stack_info;
{
- inf_status->pc_changed = pc_changed;
inf_status->stop_signal = stop_signal;
inf_status->stop_pc = stop_pc;
inf_status->stop_frame_address = stop_frame_address;
inf_status->proceed_to_finish = proceed_to_finish;
memcpy (inf_status->stop_registers, stop_registers, REGISTER_BYTES);
-
+
+ read_register_bytes (0, inf_status->registers, REGISTER_BYTES);
+
record_selected_frame (&(inf_status->selected_frame_address),
&(inf_status->selected_level));
return;
}
+struct restore_selected_frame_args {
+ FRAME_ADDR frame_address;
+ int level;
+};
+
+static int restore_selected_frame PARAMS ((char *));
+
+/* Restore the selected frame. args is really a struct
+ restore_selected_frame_args * (declared as char * for catch_errors)
+ telling us what frame to restore. Returns 1 for success, or 0 for
+ failure. An error message will have been printed on error. */
+static int
+restore_selected_frame (args)
+ char *args;
+{
+ struct restore_selected_frame_args *fr =
+ (struct restore_selected_frame_args *) args;
+ FRAME fid;
+ int level = fr->level;
+
+ fid = find_relative_frame (get_current_frame (), &level);
+
+ /* If inf_status->selected_frame_address is NULL, there was no
+ previously selected frame. */
+ if (fid == 0 ||
+ FRAME_FP (fid) != fr->frame_address ||
+ level != 0)
+ {
+ warning ("Unable to restore previously selected frame.\n");
+ return 0;
+ }
+ select_frame (fid, fr->level);
+ return(1);
+}
+
void
restore_inferior_status (inf_status)
struct inferior_status *inf_status;
{
- FRAME fid;
- int level = inf_status->selected_level;
-
- pc_changed = inf_status->pc_changed;
stop_signal = inf_status->stop_signal;
stop_pc = inf_status->stop_pc;
stop_frame_address = inf_status->stop_frame_address;
/* The inferior can be gone if the user types "print exit(0)"
(and perhaps other times). */
+ if (target_has_execution)
+ write_register_bytes (0, inf_status->registers, REGISTER_BYTES);
+
+ /* The inferior can be gone if the user types "print exit(0)"
+ (and perhaps other times). */
+
+ /* FIXME: If we are being called after stopping in a function which
+ is called from gdb, we should not be trying to restore the
+ selected frame; it just prints a spurious error message (The
+ message is useful, however, in detecting bugs in gdb (like if gdb
+ clobbers the stack)). In fact, should we be restoring the
+ inferior status at all in that case? . */
+
if (target_has_stack && inf_status->restore_stack_info)
{
- fid = find_relative_frame (get_current_frame (),
- &level);
-
- /* If inf_status->selected_frame_address is NULL, there was no
- previously selected frame. */
- if (fid == 0 ||
- FRAME_FP (fid) != inf_status->selected_frame_address ||
- level != 0)
- {
-#if 1
- /* I'm not sure this error message is a good idea. I have
- only seen it occur after "Can't continue previously
- requested operation" (we get called from do_cleanups), in
- which case it just adds insult to injury (one confusing
- error message after another. Besides which, does the
- user really care if we can't restore the previously
- selected frame? */
- fprintf (stderr, "Unable to restore previously selected frame.\n");
-#endif
- select_frame (get_current_frame (), 0);
- return;
- }
-
- select_frame (fid, inf_status->selected_level);
+ struct restore_selected_frame_args fr;
+ fr.level = inf_status->selected_level;
+ fr.frame_address = inf_status->selected_frame_address;
+ /* The point of catch_errors is that if the stack is clobbered,
+ walking the stack might encounter a garbage pointer and error()
+ trying to dereference it. */
+ if (catch_errors (restore_selected_frame, &fr,
+ "Unable to restore previously selected frame:\n",
+ RETURN_MASK_ERROR) == 0)
+ /* Error in restoring the selected frame. Select the innermost
+ frame. */
+ select_frame (get_current_frame (), 0);
}
}
projects / deliverable / binutils-gdb.git / blobdiff