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* [Bug gdb/11253] New: SEGV during reverse debugging w/ record target over simulator
@ 2010-02-05 2:37 green at moxielogic dot com
2010-02-05 6:41 ` [Bug gdb/11253] " teawater at gmail dot com
` (8 more replies)
0 siblings, 9 replies; 10+ messages in thread
From: green at moxielogic dot com @ 2010-02-05 2:37 UTC (permalink / raw)
To: gdb-prs
I'm getting a SEGV now whenever I step after setting record on for my target
(the built-in moxie simulator).
It's happening in the first line of watchpoints_triggered(), where the code reads:
int stopped_by_watchpoint = target_stopped_by_watchpoint ();
target_stopped_by_watchpoint is defined as
(*current_target.to_stopped_by_watchpoint).
The problem is that current_target.to_stopped_by_watchpoint is NULL.
This has something to do with how the record and simulator targets interact.
Normal breakpoints (w/o record) are working fine.
AG
--
Summary: SEGV during reverse debugging w/ record target over
simulator
Product: gdb
Version: 7.0
Status: UNCONFIRMED
Severity: critical
Priority: P1
Component: gdb
AssignedTo: unassigned at sourceware dot org
ReportedBy: green at moxielogic dot com
CC: gdb-prs at sourceware dot org,msnyder at vmware dot
com,teawater at gmail dot com
GCC target triplet: moxie-elf
http://sourceware.org/bugzilla/show_bug.cgi?id=11253
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* [Bug gdb/11253] SEGV during reverse debugging w/ record target over simulator
2010-02-05 2:37 [Bug gdb/11253] New: SEGV during reverse debugging w/ record target over simulator green at moxielogic dot com
@ 2010-02-05 6:41 ` teawater at gmail dot com
2010-02-05 13:03 ` green at moxielogic dot com
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: teawater at gmail dot com @ 2010-02-05 6:41 UTC (permalink / raw)
To: gdb-prs
------- Additional Comments From teawater at gmail dot com 2010-02-05 06:41 -------
Thanks Anthony.
Hello everybody,
Now I have 2 ways to handle this issue:
1. Add a check to record.c when it call to_stopped_by_watchpoint
2. Add a default value for to_stopped_by_watchpoint to init_dummy_target.
Which way for us it better?
Thanks,
Hui
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at sourceware dot|teawater at gmail dot com
|org |
Status|UNCONFIRMED |ASSIGNED
Ever Confirmed| |1
http://sourceware.org/bugzilla/show_bug.cgi?id=11253
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* [Bug gdb/11253] SEGV during reverse debugging w/ record target over simulator
2010-02-05 2:37 [Bug gdb/11253] New: SEGV during reverse debugging w/ record target over simulator green at moxielogic dot com
2010-02-05 6:41 ` [Bug gdb/11253] " teawater at gmail dot com
@ 2010-02-05 13:03 ` green at moxielogic dot com
2010-02-08 5:45 ` teawater at gmail dot com
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: green at moxielogic dot com @ 2010-02-05 13:03 UTC (permalink / raw)
To: gdb-prs
------- Additional Comments From green at moxielogic dot com 2010-02-05 13:03 -------
(In reply to comment #1)
> Thanks Anthony.
>
> Hello everybody,
>
> Now I have 2 ways to handle this issue:
> 1. Add a check to record.c when it call to_stopped_by_watchpoint
> 2. Add a default value for to_stopped_by_watchpoint to init_dummy_target.
>
> Which way for us it better?
My guess is [2].
Thanks!
AG
--
http://sourceware.org/bugzilla/show_bug.cgi?id=11253
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* [Bug gdb/11253] SEGV during reverse debugging w/ record target over simulator
2010-02-05 2:37 [Bug gdb/11253] New: SEGV during reverse debugging w/ record target over simulator green at moxielogic dot com
2010-02-05 6:41 ` [Bug gdb/11253] " teawater at gmail dot com
2010-02-05 13:03 ` green at moxielogic dot com
@ 2010-02-08 5:45 ` teawater at gmail dot com
2010-02-20 5:56 ` teawater at gmail dot com
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: teawater at gmail dot com @ 2010-02-08 5:45 UTC (permalink / raw)
To: gdb-prs
------- Additional Comments From teawater at gmail dot com 2010-02-08 05:45 -------
Subject: Re: SEGV during reverse debugging w/ record target
over simulator
Hi Anthony,
I make a patch for it.
Please help me test it.
Thanks,
Hui
2010-02-08 Hui Zhu <teawater@gmail.com>
* target.c (init_dummy_target): Add to_stopped_by_watchpoint.
---
target.c | 1 +
1 file changed, 1 insertion(+)
--- a/target.c
+++ b/target.c
@@ -2836,6 +2836,7 @@ init_dummy_target (void)
dummy_target.to_has_stack = (int (*) (struct target_ops *)) return_zero;
dummy_target.to_has_registers = (int (*) (struct target_ops *)) return_zero;
dummy_target.to_has_execution = (int (*) (struct target_ops *)) return_zero;
+ dummy_target.to_stopped_by_watchpoint = return_zero;
dummy_target.to_magic = OPS_MAGIC;
}
--
http://sourceware.org/bugzilla/show_bug.cgi?id=11253
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* [Bug gdb/11253] SEGV during reverse debugging w/ record target over simulator
2010-02-05 2:37 [Bug gdb/11253] New: SEGV during reverse debugging w/ record target over simulator green at moxielogic dot com
` (2 preceding siblings ...)
2010-02-08 5:45 ` teawater at gmail dot com
@ 2010-02-20 5:56 ` teawater at gmail dot com
2010-02-22 13:04 ` pedro at codesourcery dot com
` (4 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: teawater at gmail dot com @ 2010-02-20 5:56 UTC (permalink / raw)
To: gdb-prs
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------- Additional Comments From teawater at gmail dot com 2010-02-20 05:56 -------
Subject: Re: SEGV during reverse debugging w/ record target
over simulator
Ping.
On Mon, Feb 8, 2010 at 13:44, Hui Zhu <teawater@gmail.com> wrote:
> Hi Anthony,
>
> I make a patch for it.
>
> Please help me test it.
>
> Thanks,
> Hui
>
> 2010-02-08 Hui Zhu <teawater@gmail.com>
>
> * target.c (init_dummy_target): Add to_stopped_by_watchpoint.
> ---
> target.c | 1 +
> 1 file changed, 1 insertion(+)
>
> --- a/target.c
> +++ b/target.c
> @@ -2836,6 +2836,7 @@ init_dummy_target (void)
> dummy_target.to_has_stack = (int (*) (struct target_ops *)) return_zero;
> dummy_target.to_has_registers = (int (*) (struct target_ops *)) return_zero;
> dummy_target.to_has_execution = (int (*) (struct target_ops *)) return_zero;
> + dummy_target.to_stopped_by_watchpoint = return_zero;
> dummy_target.to_magic = OPS_MAGIC;
> }
>
--
http://sourceware.org/bugzilla/show_bug.cgi?id=11253
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* [Bug gdb/11253] SEGV during reverse debugging w/ record target over simulator
2010-02-05 2:37 [Bug gdb/11253] New: SEGV during reverse debugging w/ record target over simulator green at moxielogic dot com
` (3 preceding siblings ...)
2010-02-20 5:56 ` teawater at gmail dot com
@ 2010-02-22 13:04 ` pedro at codesourcery dot com
2010-02-22 16:47 ` teawater at gmail dot com
` (3 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: pedro at codesourcery dot com @ 2010-02-22 13:04 UTC (permalink / raw)
To: gdb-prs
------- Additional Comments From pedro at codesourcery dot com 2010-02-22 13:04 -------
Subject: Re: SEGV during reverse debugging w/ record target
=?iso-8859-1?q?=09over?= simulator
On Saturday 20 February 2010 05:55:57, Hui Zhu wrote:
> Ping.
>
> On Mon, Feb 8, 2010 at 13:44, Hui Zhu <teawater@gmail.com> wrote:
> > Hi Anthony,
> >
> > I make a patch for it.
> >
> > Please help me test it.
> >
> > Thanks,
> > Hui
> >
> > 2010-02-08 Hui Zhu <teawater@gmail.com>
> >
> > * target.c (init_dummy_target): Add to_stopped_by_watchpoint.
> > ---
> > target.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > --- a/target.c
> > +++ b/target.c
> > @@ -2836,6 +2836,7 @@ init_dummy_target (void)
> > dummy_target.to_has_stack = (int (*) (struct target_ops *)) return_zero;
> > dummy_target.to_has_registers = (int (*) (struct target_ops *)) return_zero;
> > dummy_target.to_has_execution = (int (*) (struct target_ops *)) return_zero;
> > + dummy_target.to_stopped_by_watchpoint = return_zero;
> > dummy_target.to_magic = OPS_MAGIC;
> > }
> >
>
Does this actually fix the problem? How?
--
http://sourceware.org/bugzilla/show_bug.cgi?id=11253
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* [Bug gdb/11253] SEGV during reverse debugging w/ record target over simulator
2010-02-05 2:37 [Bug gdb/11253] New: SEGV during reverse debugging w/ record target over simulator green at moxielogic dot com
` (4 preceding siblings ...)
2010-02-22 13:04 ` pedro at codesourcery dot com
@ 2010-02-22 16:47 ` teawater at gmail dot com
2010-02-25 21:44 ` green at moxielogic dot com
` (2 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: teawater at gmail dot com @ 2010-02-22 16:47 UTC (permalink / raw)
To: gdb-prs
------- Additional Comments From teawater at gmail dot com 2010-02-22 16:47 -------
Patch wait Green's test.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |WAITING
http://sourceware.org/bugzilla/show_bug.cgi?id=11253
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* [Bug gdb/11253] SEGV during reverse debugging w/ record target over simulator
2010-02-05 2:37 [Bug gdb/11253] New: SEGV during reverse debugging w/ record target over simulator green at moxielogic dot com
` (5 preceding siblings ...)
2010-02-22 16:47 ` teawater at gmail dot com
@ 2010-02-25 21:44 ` green at moxielogic dot com
2010-02-26 3:26 ` teawater at gmail dot com
2010-03-11 9:25 ` teawater at gmail dot com
8 siblings, 0 replies; 10+ messages in thread
From: green at moxielogic dot com @ 2010-02-25 21:44 UTC (permalink / raw)
To: gdb-prs
------- Additional Comments From green at moxielogic dot com 2010-02-25 21:44 -------
(In reply to comment #3)
> Subject: Re: SEGV during reverse debugging w/ record target
> over simulator
>
> Hi Anthony,
>
> I make a patch for it.
>
> Please help me test it.
>
This patch appears to fix the problem.
Thanks!
AG
--
http://sourceware.org/bugzilla/show_bug.cgi?id=11253
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* [Bug gdb/11253] SEGV during reverse debugging w/ record target over simulator
2010-02-05 2:37 [Bug gdb/11253] New: SEGV during reverse debugging w/ record target over simulator green at moxielogic dot com
` (6 preceding siblings ...)
2010-02-25 21:44 ` green at moxielogic dot com
@ 2010-02-26 3:26 ` teawater at gmail dot com
2010-03-11 9:25 ` teawater at gmail dot com
8 siblings, 0 replies; 10+ messages in thread
From: teawater at gmail dot com @ 2010-02-26 3:26 UTC (permalink / raw)
To: gdb-prs
------- Additional Comments From teawater at gmail dot com 2010-02-26 03:26 -------
Wait review.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=11253
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* [Bug gdb/11253] SEGV during reverse debugging w/ record target over simulator
2010-02-05 2:37 [Bug gdb/11253] New: SEGV during reverse debugging w/ record target over simulator green at moxielogic dot com
` (7 preceding siblings ...)
2010-02-26 3:26 ` teawater at gmail dot com
@ 2010-03-11 9:25 ` teawater at gmail dot com
8 siblings, 0 replies; 10+ messages in thread
From: teawater at gmail dot com @ 2010-03-11 9:25 UTC (permalink / raw)
To: gdb-prs
------- Additional Comments From teawater at gmail dot com 2010-03-11 09:24 -------
Fixed in cvs-head.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution| |FIXED
http://sourceware.org/bugzilla/show_bug.cgi?id=11253
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2010-02-05 2:37 [Bug gdb/11253] New: SEGV during reverse debugging w/ record target over simulator green at moxielogic dot com
2010-02-05 6:41 ` [Bug gdb/11253] " teawater at gmail dot com
2010-02-05 13:03 ` green at moxielogic dot com
2010-02-08 5:45 ` teawater at gmail dot com
2010-02-20 5:56 ` teawater at gmail dot com
2010-02-22 13:04 ` pedro at codesourcery dot com
2010-02-22 16:47 ` teawater at gmail dot com
2010-02-25 21:44 ` green at moxielogic dot com
2010-02-26 3:26 ` teawater at gmail dot com
2010-03-11 9:25 ` teawater at gmail dot com
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