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2005-04-01 Michael Snyder <msnyder@redhat.com> 

* dummy-frame.c (dummy_frame_sniffer): Optimization: don't bother
	computing this_id if there are no dummy frames on the stack.
This commit is contained in:
Michael Snyder 2005-04-02 00:45:52 +00:00
parent f6fe78d68c
commit 0c98cc2b81
2 changed files with 26 additions and 17 deletions
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3
gdb/ChangeLog
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@ -1,5 +1,8 @@
2005-04-01 Michael Snyder <msnyder@redhat.com>
* dummy-frame.c (dummy_frame_sniffer): Optimization: don't bother
computing this_id if there are no dummy frames on the stack.
* mn10300-tdep.c (mn10300_frame_unwind_cache): Use
find_partial_func instead of unwind_pc to identify frame.
(mn10300_push_dummy_call): Handle struct args, struct_return.

40
gdb/dummy-frame.c
View File

@ -137,25 +137,31 @@ dummy_frame_sniffer (const struct frame_unwind *self,
entry point, or some random address on the stack. Trying to use
that PC to apply standard frame ID unwind techniques is just
asking for trouble. */
/* Use an architecture specific method to extract the prev's dummy
ID from the next frame. Note that this method uses
frame_register_unwind to obtain the register values needed to
determine the dummy frame's ID. */
this_id = gdbarch_unwind_dummy_id (get_frame_arch (next_frame), next_frame);
/* Use that ID to find the corresponding cache entry. */
for (dummyframe = dummy_frame_stack;
dummyframe != NULL;
dummyframe = dummyframe->next)
/* Don't bother unles there is at least one dummy frame. */
if (dummy_frame_stack != NULL)
{
if (frame_id_eq (dummyframe->id, this_id))
/* Use an architecture specific method to extract the prev's
dummy ID from the next frame. Note that this method uses
frame_register_unwind to obtain the register values needed to
determine the dummy frame's ID. */
this_id = gdbarch_unwind_dummy_id (get_frame_arch (next_frame),
next_frame);
/* Use that ID to find the corresponding cache entry. */
for (dummyframe = dummy_frame_stack;
dummyframe != NULL;
dummyframe = dummyframe->next)
{
struct dummy_frame_cache *cache;
cache = FRAME_OBSTACK_ZALLOC (struct dummy_frame_cache);
cache->prev_regcache = dummyframe->regcache;
cache->this_id = this_id;
(*this_prologue_cache) = cache;
return 1;
if (frame_id_eq (dummyframe->id, this_id))
{
struct dummy_frame_cache *cache;
cache = FRAME_OBSTACK_ZALLOC (struct dummy_frame_cache);
cache->prev_regcache = dummyframe->regcache;
cache->this_id = this_id;
(*this_prologue_cache) = cache;
return 1;
}
}
}
return 0;