/* Code dealing with dummy stack frames, for GDB, the GNU debugger.
- Copyright (C) 1986-2014 Free Software Foundation, Inc.
+ Copyright (C) 1986-2017 Free Software Foundation, Inc.
This file is part of GDB.
#include "regcache.h"
#include "frame.h"
#include "inferior.h"
-#include "gdb_assert.h"
#include "frame-unwind.h"
#include "command.h"
#include "gdbcmd.h"
-#include <string.h>
#include "observer.h"
#include "gdbthread.h"
+#include "infcall.h"
+
+struct dummy_frame_id
+{
+ /* This frame's ID. Must match the value returned by
+ gdbarch_dummy_id. */
+ struct frame_id id;
+
+ /* The thread this dummy_frame relates to. */
+ ptid_t ptid;
+};
+
+/* Return whether dummy_frame_id *ID1 and *ID2 are equal. */
+
+static int
+dummy_frame_id_eq (struct dummy_frame_id *id1,
+ struct dummy_frame_id *id2)
+{
+ return frame_id_eq (id1->id, id2->id) && ptid_equal (id1->ptid, id2->ptid);
+}
+
+/* List of dummy_frame destructors. */
+
+struct dummy_frame_dtor_list
+{
+ /* Next element in the list or NULL if this is the last element. */
+ struct dummy_frame_dtor_list *next;
+
+ /* If non-NULL, a destructor that is run when this dummy frame is freed. */
+ dummy_frame_dtor_ftype *dtor;
+
+ /* Arbitrary data that is passed to DTOR. */
+ void *dtor_data;
+};
/* Dummy frame. This saves the processor state just prior to setting
up the inferior function call. Older targets save the registers
struct dummy_frame
{
struct dummy_frame *next;
- /* This frame's ID. Must match the value returned by
- gdbarch_dummy_id. */
- struct frame_id id;
+
+ /* An id represents a dummy frame. */
+ struct dummy_frame_id id;
+
/* The caller's state prior to the call. */
struct infcall_suspend_state *caller_state;
+
+ /* First element of destructors list or NULL if there are no
+ destructors registered for this dummy_frame. */
+ struct dummy_frame_dtor_list *dtor_list;
};
static struct dummy_frame *dummy_frame_stack = NULL;
void
dummy_frame_push (struct infcall_suspend_state *caller_state,
- const struct frame_id *dummy_id)
+ const struct frame_id *dummy_id, ptid_t ptid)
{
struct dummy_frame *dummy_frame;
dummy_frame = XCNEW (struct dummy_frame);
dummy_frame->caller_state = caller_state;
- dummy_frame->id = (*dummy_id);
+ dummy_frame->id.id = (*dummy_id);
+ dummy_frame->id.ptid = ptid;
dummy_frame->next = dummy_frame_stack;
dummy_frame_stack = dummy_frame;
}
{
struct dummy_frame *dummy = *dummy_ptr;
+ while (dummy->dtor_list != NULL)
+ {
+ struct dummy_frame_dtor_list *list = dummy->dtor_list;
+
+ dummy->dtor_list = list->next;
+ list->dtor (list->dtor_data, 0);
+ xfree (list);
+ }
+
*dummy_ptr = dummy->next;
discard_infcall_suspend_state (dummy->caller_state);
xfree (dummy);
static int
pop_dummy_frame_bpt (struct breakpoint *b, void *dummy_voidp)
{
- struct dummy_frame *dummy = dummy_voidp;
+ struct dummy_frame *dummy = (struct dummy_frame *) dummy_voidp;
- if (b->thread == pid_to_thread_id (inferior_ptid)
- && b->disposition == disp_del && frame_id_eq (b->frame_id, dummy->id))
+ if (b->thread == ptid_to_global_thread_id (dummy->id.ptid)
+ && b->disposition == disp_del && frame_id_eq (b->frame_id, dummy->id.id))
{
while (b->related_breakpoint != b)
delete_breakpoint (b->related_breakpoint);
{
struct dummy_frame *dummy = *dummy_ptr;
+ gdb_assert (ptid_equal (dummy->id.ptid, inferior_ptid));
+
+ while (dummy->dtor_list != NULL)
+ {
+ struct dummy_frame_dtor_list *list = dummy->dtor_list;
+
+ dummy->dtor_list = list->next;
+ list->dtor (list->dtor_data, 1);
+ xfree (list);
+ }
+
restore_infcall_suspend_state (dummy->caller_state);
iterate_over_breakpoints (pop_dummy_frame_bpt, dummy);
Return NULL if not found. */
static struct dummy_frame **
-lookup_dummy_frame (struct frame_id dummy_id)
+lookup_dummy_frame (struct dummy_frame_id *dummy_id)
{
struct dummy_frame **dp;
for (dp = &dummy_frame_stack; *dp != NULL; dp = &(*dp)->next)
{
- if (frame_id_eq ((*dp)->id, dummy_id))
+ if (dummy_frame_id_eq (&(*dp)->id, dummy_id))
return dp;
}
return NULL;
}
-/* Pop the dummy frame DUMMY_ID, restoring program state to that before the
- frame was created.
+/* Find the dummy frame by DUMMY_ID and PTID, and pop it, restoring
+ program state to that before the frame was created.
On return reinit_frame_cache has been called.
- If the frame isn't found, flag an internal error.
-
- NOTE: This can only pop the one frame, even if it is in the middle of the
- stack, because the other frames may be for different threads, and there's
- currently no way to tell which stack frame is for which thread. */
+ If the frame isn't found, flag an internal error. */
void
-dummy_frame_pop (struct frame_id dummy_id)
+dummy_frame_pop (struct frame_id dummy_id, ptid_t ptid)
{
struct dummy_frame **dp;
+ struct dummy_frame_id id = { dummy_id, ptid };
- dp = lookup_dummy_frame (dummy_id);
+ dp = lookup_dummy_frame (&id);
gdb_assert (dp != NULL);
pop_dummy_frame (dp);
}
-/* Drop dummy frame DUMMY_ID. Do nothing if it is not found. Do not restore
- its state into inferior, just free its memory. */
+/* Find the dummy frame by DUMMY_ID and PTID and drop it. Do nothing
+ if it is not found. Do not restore its state into inferior, just
+ free its memory. */
void
-dummy_frame_discard (struct frame_id dummy_id)
+dummy_frame_discard (struct frame_id dummy_id, ptid_t ptid)
{
struct dummy_frame **dp;
+ struct dummy_frame_id id = { dummy_id, ptid };
- dp = lookup_dummy_frame (dummy_id);
+ dp = lookup_dummy_frame (&id);
if (dp)
remove_dummy_frame (dp);
}
+/* See dummy-frame.h. */
+
+void
+register_dummy_frame_dtor (struct frame_id dummy_id, ptid_t ptid,
+ dummy_frame_dtor_ftype *dtor, void *dtor_data)
+{
+ struct dummy_frame_id id = { dummy_id, ptid };
+ struct dummy_frame **dp, *d;
+ struct dummy_frame_dtor_list *list;
+
+ dp = lookup_dummy_frame (&id);
+ gdb_assert (dp != NULL);
+ d = *dp;
+ list = XNEW (struct dummy_frame_dtor_list);
+ list->next = d->dtor_list;
+ d->dtor_list = list;
+ list->dtor = dtor;
+ list->dtor_data = dtor_data;
+}
+
+/* See dummy-frame.h. */
+
+int
+find_dummy_frame_dtor (dummy_frame_dtor_ftype *dtor, void *dtor_data)
+{
+ struct dummy_frame *d;
+
+ for (d = dummy_frame_stack; d != NULL; d = d->next)
+ {
+ struct dummy_frame_dtor_list *list;
+
+ for (list = d->dtor_list; list != NULL; list = list->next)
+ if (list->dtor == dtor && list->dtor_data == dtor_data)
+ return 1;
+ }
+ return 0;
+}
+
/* There may be stale dummy frames, perhaps left over from when an uncaught
longjmp took us out of a function that was called by the debugger. Clean
them up at least once whenever we start a new inferior. */
dummy ID, assuming it is a dummy frame. */
struct frame_id this_id
= gdbarch_dummy_id (get_frame_arch (this_frame), this_frame);
+ struct dummy_frame_id dummy_id = { this_id, inferior_ptid };
/* Use that ID to find the corresponding cache entry. */
for (dummyframe = dummy_frame_stack;
dummyframe != NULL;
dummyframe = dummyframe->next)
{
- if (frame_id_eq (dummyframe->id, this_id))
+ if (dummy_frame_id_eq (&dummyframe->id, &dummy_id))
{
struct dummy_frame_cache *cache;
void **this_prologue_cache,
int regnum)
{
- struct dummy_frame_cache *cache = (*this_prologue_cache);
+ struct dummy_frame_cache *cache
+ = (struct dummy_frame_cache *) *this_prologue_cache;
struct gdbarch *gdbarch = get_frame_arch (this_frame);
struct value *reg_val;
struct frame_id *this_id)
{
/* The dummy-frame sniffer always fills in the cache. */
- struct dummy_frame_cache *cache = (*this_prologue_cache);
+ struct dummy_frame_cache *cache
+ = (struct dummy_frame_cache *) *this_prologue_cache;
gdb_assert (cache != NULL);
(*this_id) = cache->this_id;
gdb_print_host_address (s, file);
fprintf_unfiltered (file, ":");
fprintf_unfiltered (file, " id=");
- fprint_frame_id (file, s->id);
+ fprint_frame_id (file, s->id.id);
+ fprintf_unfiltered (file, ", ptid=%s",
+ target_pid_to_str (s->id.ptid));
fprintf_unfiltered (file, "\n");
}
}
fprint_dummy_frames (gdb_stdout);
else
{
- struct cleanup *cleanups;
- struct ui_file *file = gdb_fopen (args, "w");
+ stdio_file file;
- if (file == NULL)
+ if (!file.open (args, "w"))
perror_with_name (_("maintenance print dummy-frames"));
- cleanups = make_cleanup_ui_file_delete (file);
- fprint_dummy_frames (file);
- do_cleanups (cleanups);
+ fprint_dummy_frames (&file);
}
}