* [PATCH] gdb: fix sparc memcpy fortify error
@ 2010-03-19 2:09 Mike Frysinger
2010-03-19 7:45 ` Eli Zaretskii
` (2 more replies)
0 siblings, 3 replies; 16+ messages in thread
From: Mike Frysinger @ 2010-03-19 2:09 UTC (permalink / raw)
To: gdb-patches
Building on an x86_64-linux system with --enable-targets=all fails on the
sparc code with a fortify error:
cc1: warnings being treated as errors
In file included from /usr/include/string.h:640,
from gnulib/string.h:23,
from ../../gdb/gdb_string.h:25,
from ../../gdb/vec.h:25,
from ../../gdb/memattr.h:24,
from ../../gdb/target.h:60,
from ../../gdb/exec.h:23,
from ../../gdb/gdbcore.h:31,
from ../../gdb/sparc-tdep.c:29:
In function 'memcpy',
inlined from 'sparc32_store_return_value' at ../../gdb/sparc-tdep.c:1112,
inlined from 'sparc32_return_value' at ../../gdb/sparc-tdep.c:1170:
/usr/include/bits/string3.h:52: error: call to __builtin___memcpy_chk will
always overflow destination buffer
make: *** [sparc-tdep.o] Error 1
So have the buffer be the max of the lengths used with memcpy().
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
2010-03-18 Mike Frysinger <vapier@gentoo.org>
* gdb/sparc-tdep.c (sparc32_store_return_value): Declare the length
of buf using the "len" variable.
gdb/sparc-tdep.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/gdb/sparc-tdep.c b/gdb/sparc-tdep.c
index f129a55..ea0cdd2 100644
--- a/gdb/sparc-tdep.c
+++ b/gdb/sparc-tdep.c
@@ -1101,7 +1101,7 @@ sparc32_store_return_value (struct type *type, struct regcache *regcache,
const gdb_byte *valbuf)
{
int len = TYPE_LENGTH (type);
- gdb_byte buf[8];
+ gdb_byte buf[max(len, 8)];
gdb_assert (!sparc_structure_or_union_p (type));
gdb_assert (!(sparc_floating_p (type) && len == 16));
--
1.7.0.2
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH] gdb: fix sparc memcpy fortify error
2010-03-19 2:09 [PATCH] gdb: fix sparc memcpy fortify error Mike Frysinger
@ 2010-03-19 7:45 ` Eli Zaretskii
2010-03-19 8:18 ` Hui Zhu
2010-03-19 9:26 ` Mark Kettenis
2010-03-19 20:11 ` [PATCH] gdb: workaround " Mike Frysinger
2 siblings, 1 reply; 16+ messages in thread
From: Eli Zaretskii @ 2010-03-19 7:45 UTC (permalink / raw)
To: Mike Frysinger; +Cc: gdb-patches
> From: Mike Frysinger <vapier@gentoo.org>
> Date: Thu, 18 Mar 2010 22:09:09 -0400
>
> - gdb_byte buf[8];
> + gdb_byte buf[max(len, 8)];
Isn't this Standard C only under C9x? If so, we don't yet require
that standard version, AFAIK.
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH] gdb: fix sparc memcpy fortify error
2010-03-19 7:45 ` Eli Zaretskii
@ 2010-03-19 8:18 ` Hui Zhu
2010-03-19 8:42 ` Andreas Schwab
2010-03-19 17:10 ` Mike Frysinger
0 siblings, 2 replies; 16+ messages in thread
From: Hui Zhu @ 2010-03-19 8:18 UTC (permalink / raw)
To: Eli Zaretskii, Mike Frysinger; +Cc: gdb-patches
Hi,
I got this issue in a amd64 ubuntu 9.04.
I reported it before, someone tell me that this is the bug of gcc.
Now, I handle this issue in this pc is remove all the sparc function
from init.c file.
Thanks,
Hui
On Fri, Mar 19, 2010 at 15:44, Eli Zaretskii <eliz@gnu.org> wrote:
>> From: Mike Frysinger <vapier@gentoo.org>
>> Date: Thu, 18 Mar 2010 22:09:09 -0400
>>
>> - gdb_byte buf[8];
>> + gdb_byte buf[max(len, 8)];
>
> Isn't this Standard C only under C9x? If so, we don't yet require
> that standard version, AFAIK.
>
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH] gdb: fix sparc memcpy fortify error
2010-03-19 8:18 ` Hui Zhu
@ 2010-03-19 8:42 ` Andreas Schwab
2010-03-19 17:10 ` Mike Frysinger
1 sibling, 0 replies; 16+ messages in thread
From: Andreas Schwab @ 2010-03-19 8:42 UTC (permalink / raw)
To: Hui Zhu; +Cc: Eli Zaretskii, Mike Frysinger, gdb-patches
Hui Zhu <teawater@gmail.com> writes:
> I reported it before, someone tell me that this is the bug of gcc.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37060
Andreas.
--
Andreas Schwab, schwab@redhat.com
GPG Key fingerprint = D4E8 DBE3 3813 BB5D FA84 5EC7 45C6 250E 6F00 984E
"And now for something completely different."
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH] gdb: fix sparc memcpy fortify error
2010-03-19 2:09 [PATCH] gdb: fix sparc memcpy fortify error Mike Frysinger
2010-03-19 7:45 ` Eli Zaretskii
@ 2010-03-19 9:26 ` Mark Kettenis
2010-03-19 17:09 ` Mike Frysinger
2010-03-19 20:11 ` [PATCH] gdb: workaround " Mike Frysinger
2 siblings, 1 reply; 16+ messages in thread
From: Mark Kettenis @ 2010-03-19 9:26 UTC (permalink / raw)
To: vapier; +Cc: gdb-patches
> From: Mike Frysinger <vapier@gentoo.org>
> Date: Thu, 18 Mar 2010 22:09:09 -0400
>
> Building on an x86_64-linux system with --enable-targets=all fails on the
> sparc code with a fortify error:
>
> cc1: warnings being treated as errors
> In file included from /usr/include/string.h:640,
> from gnulib/string.h:23,
> from ../../gdb/gdb_string.h:25,
> from ../../gdb/vec.h:25,
> from ../../gdb/memattr.h:24,
> from ../../gdb/target.h:60,
> from ../../gdb/exec.h:23,
> from ../../gdb/gdbcore.h:31,
> from ../../gdb/sparc-tdep.c:29:
> In function 'memcpy',
> inlined from 'sparc32_store_return_value' at ../../gdb/sparc-tdep.c:1112,
> inlined from 'sparc32_return_value' at ../../gdb/sparc-tdep.c:1170:
> /usr/include/bits/string3.h:52: error: call to __builtin___memcpy_chk will
> always overflow destination buffer
> make: *** [sparc-tdep.o] Error 1
That's a false positive I'm afraid. I agree that it isn't trivial to
see that there is no buffer overflow here. Unfortunately your
solution is a bit problematic:
> 2010-03-18 Mike Frysinger <vapier@gentoo.org>
>
> * gdb/sparc-tdep.c (sparc32_store_return_value): Declare the length
> of buf using the "len" variable.
>
> gdb/sparc-tdep.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/gdb/sparc-tdep.c b/gdb/sparc-tdep.c
> index f129a55..ea0cdd2 100644
> --- a/gdb/sparc-tdep.c
> +++ b/gdb/sparc-tdep.c
> @@ -1101,7 +1101,7 @@ sparc32_store_return_value (struct type *type, struct regcache *regcache,
> const gdb_byte *valbuf)
> {
> int len = TYPE_LENGTH (type);
> - gdb_byte buf[8];
> + gdb_byte buf[max(len, 8)];
Sorry, but variable sized arrays aren't C90.
Does it help if you replace
> gdb_assert (!(sparc_floating_p (type) && len == 16));
with
gdb_assert (len <= 8);
?
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH] gdb: fix sparc memcpy fortify error
2010-03-19 9:26 ` Mark Kettenis
@ 2010-03-19 17:09 ` Mike Frysinger
0 siblings, 0 replies; 16+ messages in thread
From: Mike Frysinger @ 2010-03-19 17:09 UTC (permalink / raw)
To: Mark Kettenis; +Cc: gdb-patches
[-- Attachment #1: Type: Text/Plain, Size: 238 bytes --]
On Friday 19 March 2010 05:25:49 Mark Kettenis wrote:
> Does it help if you replace
>
> > gdb_assert (!(sparc_floating_p (type) && len == 16));
>
> with
>
> gdb_assert (len <= 8);
yes, that works on my system
-mike
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^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH] gdb: fix sparc memcpy fortify error
2010-03-19 8:18 ` Hui Zhu
2010-03-19 8:42 ` Andreas Schwab
@ 2010-03-19 17:10 ` Mike Frysinger
1 sibling, 0 replies; 16+ messages in thread
From: Mike Frysinger @ 2010-03-19 17:10 UTC (permalink / raw)
To: Hui Zhu; +Cc: Eli Zaretskii, gdb-patches
[-- Attachment #1: Type: Text/Plain, Size: 283 bytes --]
On Friday 19 March 2010 04:18:06 Hui Zhu wrote:
> I got this issue in a amd64 ubuntu 9.04.
> I reported it before, someone tell me that this is the bug of gcc.
hrm, i searched a little before, but i guess i didnt use the right keywords to
find the previous discussion
-mike
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^ permalink raw reply [flat|nested] 16+ messages in thread
* [PATCH] gdb: workaround sparc memcpy fortify error
2010-03-19 2:09 [PATCH] gdb: fix sparc memcpy fortify error Mike Frysinger
2010-03-19 7:45 ` Eli Zaretskii
2010-03-19 9:26 ` Mark Kettenis
@ 2010-03-19 20:11 ` Mike Frysinger
2010-04-19 18:59 ` Mike Frysinger
2 siblings, 1 reply; 16+ messages in thread
From: Mike Frysinger @ 2010-03-19 20:11 UTC (permalink / raw)
To: gdb-patches
Building on an x86_64-linux system with --enable-targets=all fails on the
sparc code with a fortify error:
cc1: warnings being treated as errors
In file included from /usr/include/string.h:640,
from gnulib/string.h:23,
from ../../gdb/gdb_string.h:25,
from ../../gdb/vec.h:25,
from ../../gdb/memattr.h:24,
from ../../gdb/target.h:60,
from ../../gdb/exec.h:23,
from ../../gdb/gdbcore.h:31,
from ../../gdb/sparc-tdep.c:29:
In function 'memcpy',
inlined from 'sparc32_store_return_value' at ../../gdb/sparc-tdep.c:1112,
inlined from 'sparc32_return_value' at ../../gdb/sparc-tdep.c:1170:
/usr/include/bits/string3.h:52: error: call to __builtin___memcpy_chk will
always overflow destination buffer
make: *** [sparc-tdep.o] Error 1
This is due to the gcc optimizer bug PR37060, so tweak the gdb_assert ()
to avoid the issue.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
2010-03-19 Mike Frysinger <vapier@gentoo.org>
* gdb/sparc-tdep.c (sparc32_store_return_value): Change gdb_assert ()
to len <= 8.
gdb/sparc-tdep.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/gdb/sparc-tdep.c b/gdb/sparc-tdep.c
index f129a55..ab45ddd 100644
--- a/gdb/sparc-tdep.c
+++ b/gdb/sparc-tdep.c
@@ -1062,7 +1062,7 @@ sparc32_extract_return_value (struct type *type, struct regcache *regcache,
gdb_byte buf[8];
gdb_assert (!sparc_structure_or_union_p (type));
- gdb_assert (!(sparc_floating_p (type) && len == 16));
+ gdb_assert (len <= 8);
if (sparc_floating_p (type))
{
--
1.7.0.2
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH] gdb: workaround sparc memcpy fortify error
2010-03-19 20:11 ` [PATCH] gdb: workaround " Mike Frysinger
@ 2010-04-19 18:59 ` Mike Frysinger
2010-04-21 15:30 ` Joel Brobecker
0 siblings, 1 reply; 16+ messages in thread
From: Mike Frysinger @ 2010-04-19 18:59 UTC (permalink / raw)
To: gdb-patches
[-- Attachment #1: Type: Text/Plain, Size: 172 bytes --]
On Friday 19 March 2010 16:11:30 Mike Frysinger wrote:
> This is due to the gcc optimizer bug PR37060, so tweak the gdb_assert ()
> to avoid the issue.
is this OK ?
-mike
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^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH] gdb: workaround sparc memcpy fortify error
2010-04-19 18:59 ` Mike Frysinger
@ 2010-04-21 15:30 ` Joel Brobecker
2010-04-21 15:38 ` Tom Tromey
0 siblings, 1 reply; 16+ messages in thread
From: Joel Brobecker @ 2010-04-21 15:30 UTC (permalink / raw)
To: Mike Frysinger; +Cc: gdb-patches
> > This is due to the gcc optimizer bug PR37060, so tweak the gdb_assert ()
> > to avoid the issue.
>
> is this OK ?
ENOPATCH?
--
Joel
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH] gdb: workaround sparc memcpy fortify error
2010-04-21 15:30 ` Joel Brobecker
@ 2010-04-21 15:38 ` Tom Tromey
2010-04-21 16:01 ` Joel Brobecker
0 siblings, 1 reply; 16+ messages in thread
From: Tom Tromey @ 2010-04-21 15:38 UTC (permalink / raw)
To: Joel Brobecker; +Cc: Mike Frysinger, gdb-patches
>>>>> "Joel" == Joel Brobecker <brobecker@adacore.com> writes:
>> > This is due to the gcc optimizer bug PR37060, so tweak the gdb_assert ()
>> > to avoid the issue.
>>
>> is this OK ?
Joel> ENOPATCH?
It was a ping for http://permalink.gmane.org/gmane.comp.gdb.patches/56350
Tom
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH] gdb: workaround sparc memcpy fortify error
2010-04-21 15:38 ` Tom Tromey
@ 2010-04-21 16:01 ` Joel Brobecker
2010-04-21 16:10 ` Mark Kettenis
0 siblings, 1 reply; 16+ messages in thread
From: Joel Brobecker @ 2010-04-21 16:01 UTC (permalink / raw)
To: kettenis; +Cc: Mike Frysinger, gdb-patches
> Joel> ENOPATCH?
>
> It was a ping for http://permalink.gmane.org/gmane.comp.gdb.patches/56350
Aha - Mark Kettenis seemed to be OK with this, since he's the one
who suggested it. Mark, is this patch still OK?
2010-03-19 Mike Frysinger <vapier <at> gentoo.org>
* gdb/sparc-tdep.c (sparc32_store_return_value): Change gdb_assert ()
to len <= 8.
gdb/sparc-tdep.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/gdb/sparc-tdep.c b/gdb/sparc-tdep.c
index f129a55..ab45ddd 100644
--- a/gdb/sparc-tdep.c
+++ b/gdb/sparc-tdep.c
@@ -1062,7 +1062,7 @@ sparc32_extract_return_value (struct type *type, struct regcache *regcache,
gdb_byte buf[8];
gdb_assert (!sparc_structure_or_union_p (type));
- gdb_assert (!(sparc_floating_p (type) && len == 16));
+ gdb_assert (len <= 8);
if (sparc_floating_p (type))
{
--
Joel
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH] gdb: workaround sparc memcpy fortify error
2010-04-21 16:01 ` Joel Brobecker
@ 2010-04-21 16:10 ` Mark Kettenis
2010-04-21 19:40 ` Mike Frysinger
0 siblings, 1 reply; 16+ messages in thread
From: Mark Kettenis @ 2010-04-21 16:10 UTC (permalink / raw)
To: brobecker; +Cc: vapier, gdb-patches
> X-SWARE-Spam-Status: No, hits=-1.7 required=5.0 tests=BAYES_00,TW_CP,TW_EG
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> Date: Wed, 21 Apr 2010 12:01:41 -0400
> From: Joel Brobecker <brobecker@adacore.com>
> Cc: Mike Frysinger <vapier@gentoo.org>, gdb-patches@sourceware.org
> Content-Disposition: inline
> Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm
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>
> > Joel> ENOPATCH?
> >
> > It was a ping for http://permalink.gmane.org/gmane.comp.gdb.patches/56350
>
> Aha - Mark Kettenis seemed to be OK with this, since he's the one
> who suggested it. Mark, is this patch still OK?
Hmm, can we keep the existing gdb_assert() and just add the len <= 8
one? With that change, this is fine with me.
> 2010-03-19 Mike Frysinger <vapier <at> gentoo.org>
>
> * gdb/sparc-tdep.c (sparc32_store_return_value): Change gdb_assert ()
> to len <= 8.
>
> gdb/sparc-tdep.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/gdb/sparc-tdep.c b/gdb/sparc-tdep.c
> index f129a55..ab45ddd 100644
> --- a/gdb/sparc-tdep.c
> +++ b/gdb/sparc-tdep.c
> @@ -1062,7 +1062,7 @@ sparc32_extract_return_value (struct type *type, struct regcache *regcache,
> gdb_byte buf[8];
>
> gdb_assert (!sparc_structure_or_union_p (type));
> - gdb_assert (!(sparc_floating_p (type) && len == 16));
> + gdb_assert (len <= 8);
>
> if (sparc_floating_p (type))
> {
>
> --
> Joel
>
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH] gdb: workaround sparc memcpy fortify error
2010-04-21 16:10 ` Mark Kettenis
@ 2010-04-21 19:40 ` Mike Frysinger
2010-04-21 19:56 ` Mark Kettenis
0 siblings, 1 reply; 16+ messages in thread
From: Mike Frysinger @ 2010-04-21 19:40 UTC (permalink / raw)
To: Mark Kettenis; +Cc: brobecker, gdb-patches
[-- Attachment #1: Type: Text/Plain, Size: 482 bytes --]
On Wednesday 21 April 2010 12:08:54 Mark Kettenis wrote:
> > > It was a ping for
> > > http://permalink.gmane.org/gmane.comp.gdb.patches/56350
> >
> > Aha - Mark Kettenis seemed to be OK with this, since he's the one
> > who suggested it. Mark, is this patch still OK?
>
> Hmm, can we keep the existing gdb_assert() and just add the len <= 8
> one? With that change, this is fine with me.
fine by me. i can also add a comment about the gcc PR if people want.
-mike
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^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH] gdb: workaround sparc memcpy fortify error
2010-04-21 19:40 ` Mike Frysinger
@ 2010-04-21 19:56 ` Mark Kettenis
2010-04-21 20:12 ` Mike Frysinger
0 siblings, 1 reply; 16+ messages in thread
From: Mark Kettenis @ 2010-04-21 19:56 UTC (permalink / raw)
To: vapier; +Cc: brobecker, gdb-patches
> From: Mike Frysinger <vapier@gentoo.org>
> Date: Wed, 21 Apr 2010 15:40:43 -0400
>
> On Wednesday 21 April 2010 12:08:54 Mark Kettenis wrote:
> > > > It was a ping for
> > > > http://permalink.gmane.org/gmane.comp.gdb.patches/56350
> > >=20
> > > Aha - Mark Kettenis seemed to be OK with this, since he's the one
> > > who suggested it. Mark, is this patch still OK?
> >=20
> > Hmm, can we keep the existing gdb_assert() and just add the len <=3D 8
> > one? With that change, this is fine with me.
>
> fine by me. i can also add a comment about the gcc PR if people want.
Nah, I don't think that's really necessary in this case.
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH] gdb: workaround sparc memcpy fortify error
2010-04-21 19:56 ` Mark Kettenis
@ 2010-04-21 20:12 ` Mike Frysinger
0 siblings, 0 replies; 16+ messages in thread
From: Mike Frysinger @ 2010-04-21 20:12 UTC (permalink / raw)
To: Mark Kettenis; +Cc: brobecker, gdb-patches
[-- Attachment #1: Type: Text/Plain, Size: 752 bytes --]
this is what i ended up committing then. thanks guys.
-mike
2010-04-21 Mike Frysinger <vapier@gentoo.org>
* gdb/sparc-tdep.c (sparc32_store_return_value): Add gdb_assert ()
for len <= 8.
Index: gdb/sparc-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/sparc-tdep.c,v
retrieving revision 1.211
diff -u -p -r1.211 sparc-tdep.c
--- gdb/sparc-tdep.c 1 Jan 2010 07:31:42 -0000 1.211
+++ gdb/sparc-tdep.c 21 Apr 2010 20:10:16 -0000
@@ -1105,6 +1105,7 @@ sparc32_store_return_value (struct type
gdb_assert (!sparc_structure_or_union_p (type));
gdb_assert (!(sparc_floating_p (type) && len == 16));
+ gdb_assert (len <= 8);
if (sparc_floating_p (type))
{
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^ permalink raw reply [flat|nested] 16+ messages in thread
end of thread, other threads:[~2010-04-21 20:12 UTC | newest]
Thread overview: 16+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2010-03-19 2:09 [PATCH] gdb: fix sparc memcpy fortify error Mike Frysinger
2010-03-19 7:45 ` Eli Zaretskii
2010-03-19 8:18 ` Hui Zhu
2010-03-19 8:42 ` Andreas Schwab
2010-03-19 17:10 ` Mike Frysinger
2010-03-19 9:26 ` Mark Kettenis
2010-03-19 17:09 ` Mike Frysinger
2010-03-19 20:11 ` [PATCH] gdb: workaround " Mike Frysinger
2010-04-19 18:59 ` Mike Frysinger
2010-04-21 15:30 ` Joel Brobecker
2010-04-21 15:38 ` Tom Tromey
2010-04-21 16:01 ` Joel Brobecker
2010-04-21 16:10 ` Mark Kettenis
2010-04-21 19:40 ` Mike Frysinger
2010-04-21 19:56 ` Mark Kettenis
2010-04-21 20:12 ` Mike Frysinger
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