* Watch point for unaligned stores
@ 2005-04-23 20:25 Shaun Jackman
2005-04-24 22:36 ` Daniel Jacobowitz
0 siblings, 1 reply; 2+ messages in thread
From: Shaun Jackman @ 2005-04-23 20:25 UTC (permalink / raw)
To: gdb
I had a bug where the word at 0x8 was being clobbered by some bug in
my program. I set at a watchpoint (watch *(int*)8) but it was never
triggered even though the memory was modified. I found in the end that
the errant instruction was writing a word at address 0x9, which on the
ARM architecture modifies the word at 0x8 due to alignment. Could I
set a watchpoint that would have caught this bug, other than say
setting a watchpoint at all four addresses of the word?
Thanks,
Shaun
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Watch point for unaligned stores
2005-04-23 20:25 Watch point for unaligned stores Shaun Jackman
@ 2005-04-24 22:36 ` Daniel Jacobowitz
0 siblings, 0 replies; 2+ messages in thread
From: Daniel Jacobowitz @ 2005-04-24 22:36 UTC (permalink / raw)
To: Shaun Jackman; +Cc: gdb
On Sat, Apr 23, 2005 at 01:25:24PM -0700, Shaun Jackman wrote:
> I had a bug where the word at 0x8 was being clobbered by some bug in
> my program. I set at a watchpoint (watch *(int*)8) but it was never
> triggered even though the memory was modified. I found in the end that
> the errant instruction was writing a word at address 0x9, which on the
> ARM architecture modifies the word at 0x8 due to alignment. Could I
> set a watchpoint that would have caught this bug, other than say
> setting a watchpoint at all four addresses of the word?
This sounds like a bug in your remote debugging stub.
--
Daniel Jacobowitz
CodeSourcery, LLC
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