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Build unavailable-stack frames for tracepoint. 

gdb/ChangeLog:

2016-02-24  Wei-cheng Wang  <cole945@gmail.com>

	* rs6000-tdep.c (rs6000_frame_cache, rs6000_frame_this_id): Handle
	unavailable PC/SP to build unavailable frame.
This commit is contained in:
Wei-cheng Wang 2015-03-31 00:30:31 +08:00 committed by Marcin Kościelnicki
parent d79587bd21
commit 50ae56ec46
2 changed files with 43 additions and 11 deletions
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5
gdb/ChangeLog
View File

@ -1,3 +1,8 @@
2016-02-24 Wei-cheng Wang <cole945@gmail.com>
* rs6000-tdep.c (rs6000_frame_cache, rs6000_frame_this_id): Handle
unavailable PC/SP to build unavailable frame.
2016-02-23 Doug Evans <dje@google.com>
Extend "skip" command to support -file, -gfile, -function, -rfunction.

49
gdb/rs6000-tdep.c
View File

@ -3191,6 +3191,13 @@ struct rs6000_frame_cache
CORE_ADDR base;
CORE_ADDR initial_sp;
struct trad_frame_saved_reg *saved_regs;
/* Set BASE_P to true if this frame cache is properly initialized.
Otherwise set to false because some registers or memory cannot
collected. */
int base_p;
/* Cache PC for building unavailable frame. */
CORE_ADDR pc;
};
static struct rs6000_frame_cache *
@ -3208,21 +3215,33 @@ rs6000_frame_cache (struct frame_info *this_frame, void **this_cache)
return (struct rs6000_frame_cache *) (*this_cache);
cache = FRAME_OBSTACK_ZALLOC (struct rs6000_frame_cache);
(*this_cache) = cache;
cache->pc = 0;
cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
func = get_frame_func (this_frame);
pc = get_frame_pc (this_frame);
skip_prologue (gdbarch, func, pc, &fdata);
TRY
{
func = get_frame_func (this_frame);
cache->pc = func;
pc = get_frame_pc (this_frame);
skip_prologue (gdbarch, func, pc, &fdata);
/* Figure out the parent's stack pointer. */
/* Figure out the parent's stack pointer. */
/* NOTE: cagney/2002-04-14: The ->frame points to the inner-most
address of the current frame. Things might be easier if the
->frame pointed to the outer-most address of the frame. In
the mean time, the address of the prev frame is used as the
base address of this frame. */
cache->base = get_frame_register_unsigned
(this_frame, gdbarch_sp_regnum (gdbarch));
/* NOTE: cagney/2002-04-14: The ->frame points to the inner-most
address of the current frame. Things might be easier if the
->frame pointed to the outer-most address of the frame. In
the mean time, the address of the prev frame is used as the
base address of this frame. */
cache->base = get_frame_register_unsigned
(this_frame, gdbarch_sp_regnum (gdbarch));
}
CATCH (ex, RETURN_MASK_ERROR)
{
if (ex.error != NOT_AVAILABLE_ERROR)
throw_exception (ex);
return (*this_cache);
}
END_CATCH
/* If the function appears to be frameless, check a couple of likely
indicators that we have simply failed to find the frame setup.
@ -3371,6 +3390,7 @@ rs6000_frame_cache (struct frame_info *this_frame, void **this_cache)
cache->initial_sp
= get_frame_register_unsigned (this_frame, fdata.alloca_reg);
cache->base_p = 1;
return cache;
}
@ -3380,6 +3400,13 @@ rs6000_frame_this_id (struct frame_info *this_frame, void **this_cache,
{
struct rs6000_frame_cache *info = rs6000_frame_cache (this_frame,
this_cache);
if (!info->base_p)
{
(*this_id) = frame_id_build_unavailable_stack (info->pc);
return;
}
/* This marks the outermost frame. */
if (info->base == 0)
return;