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* [Bug tree-optimization/37584] New: -ftree-ch causes stack corruption on mingw32
@ 2008-09-19 11:31 sherpya at netfarm dot it
2008-09-19 21:05 ` [Bug target/37584] " pinskia at gcc dot gnu dot org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: sherpya at netfarm dot it @ 2008-09-19 11:31 UTC (permalink / raw)
To: gcc-bugs
Unfortunately there is no simple testcase for this,
but compiling mplayer I get a lot of crashes related to
stack corruption
i.e. a function allocates in the stack 80000 bytes
and later gdb says that it cannot access to a byte that instead is bound
I've tested with --stack-size on the linker but nothing changes
gcc version 4.4.0 20080916 (experimental)
does the same thing
while gcc 4.2 is ok
it can be reproduced compiling mplayer/mencoder with gcc >= 4.3
and doing a simple encoding using snow codec:
mencoder -oac faac -faacopts br=64 -ovc lavc -lavcopts
vcodec=snow:vstrict=-2:vqscale=3:pred=0:cmp=1:subcmp=1:mbcmp=1:qpel a.mpg -o
a.avi
Please tell me if I can provide more infos
--
Summary: -ftree-ch causes stack corruption on mingw32
Product: gcc
Version: 4.3.2
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: sherpya at netfarm dot it
GCC build triplet: i686-pc-mingw32
GCC host triplet: i686-pc-mingw32
GCC target triplet: i686-pc-mingw32
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37584
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug target/37584] -ftree-ch causes stack corruption on mingw32
2008-09-19 11:31 [Bug tree-optimization/37584] New: -ftree-ch causes stack corruption on mingw32 sherpya at netfarm dot it
@ 2008-09-19 21:05 ` pinskia at gcc dot gnu dot org
2008-09-20 9:44 ` sherpya at netfarm dot it
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2008-09-19 21:05 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from pinskia at gcc dot gnu dot org 2008-09-19 21:03 -------
We really need a testcase. And I really doubt -ftree-ch is causing any issues,
there must be a latent bug in the back-end.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|major |normal
Component|tree-optimization |target
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37584
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug target/37584] -ftree-ch causes stack corruption on mingw32
2008-09-19 11:31 [Bug tree-optimization/37584] New: -ftree-ch causes stack corruption on mingw32 sherpya at netfarm dot it
2008-09-19 21:05 ` [Bug target/37584] " pinskia at gcc dot gnu dot org
@ 2008-09-20 9:44 ` sherpya at netfarm dot it
2008-09-22 3:24 ` dannysmith at users dot sourceforge dot net
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: sherpya at netfarm dot it @ 2008-09-20 9:44 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from sherpya at netfarm dot it 2008-09-20 09:43 -------
adding -fno-tree-ch avoid crashing in mencoder, so I filled the bug on this,
but it can be a side effect of something else
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37584
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug target/37584] -ftree-ch causes stack corruption on mingw32
2008-09-19 11:31 [Bug tree-optimization/37584] New: -ftree-ch causes stack corruption on mingw32 sherpya at netfarm dot it
2008-09-19 21:05 ` [Bug target/37584] " pinskia at gcc dot gnu dot org
2008-09-20 9:44 ` sherpya at netfarm dot it
@ 2008-09-22 3:24 ` dannysmith at users dot sourceforge dot net
2008-09-22 9:52 ` sherpya at netfarm dot it
2008-10-07 12:49 ` sherpya at netfarm dot it
4 siblings, 0 replies; 6+ messages in thread
From: dannysmith at users dot sourceforge dot net @ 2008-09-22 3:24 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from dannysmith at users dot sourceforge dot net 2008-09-22 03:23 -------
I have run into what I believe is the same bug in build of of cc1plus.exe, with
miscompilation of cp/pt.c
When exercising cp/pt.c:process_partial_specialization (eg, when compiling
libstdc++'s mt_allocator.cc) I get a segfault in cygwin.asm (used in w32
implementation of __builtin_alloca)
Adding -fno-tree-ch to CFLAGS for pt.c fixes build of libstdc++ and testsuite
results
I will try to reduce a testcase when time permits.
Danny
--
dannysmith at users dot sourceforge dot net changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dannysmith at users dot
| |sourceforge dot net
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2008-09-22 03:23:45
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37584
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug target/37584] -ftree-ch causes stack corruption on mingw32
2008-09-19 11:31 [Bug tree-optimization/37584] New: -ftree-ch causes stack corruption on mingw32 sherpya at netfarm dot it
` (2 preceding siblings ...)
2008-09-22 3:24 ` dannysmith at users dot sourceforge dot net
@ 2008-09-22 9:52 ` sherpya at netfarm dot it
2008-10-07 12:49 ` sherpya at netfarm dot it
4 siblings, 0 replies; 6+ messages in thread
From: sherpya at netfarm dot it @ 2008-09-22 9:52 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from sherpya at netfarm dot it 2008-09-22 09:51 -------
I've also seen crashes in alloca(), at least according to gdb backtrace
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37584
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug target/37584] -ftree-ch causes stack corruption on mingw32
2008-09-19 11:31 [Bug tree-optimization/37584] New: -ftree-ch causes stack corruption on mingw32 sherpya at netfarm dot it
` (3 preceding siblings ...)
2008-09-22 9:52 ` sherpya at netfarm dot it
@ 2008-10-07 12:49 ` sherpya at netfarm dot it
4 siblings, 0 replies; 6+ messages in thread
From: sherpya at netfarm dot it @ 2008-10-07 12:49 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from sherpya at netfarm dot it 2008-10-07 12:48 -------
*** This bug has been marked as a duplicate of 37750 ***
--
sherpya at netfarm dot it changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |DUPLICATE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37584
^ permalink raw reply [flat|nested] 6+ messages in thread
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2008-09-19 11:31 [Bug tree-optimization/37584] New: -ftree-ch causes stack corruption on mingw32 sherpya at netfarm dot it
2008-09-19 21:05 ` [Bug target/37584] " pinskia at gcc dot gnu dot org
2008-09-20 9:44 ` sherpya at netfarm dot it
2008-09-22 3:24 ` dannysmith at users dot sourceforge dot net
2008-09-22 9:52 ` sherpya at netfarm dot it
2008-10-07 12:49 ` sherpya at netfarm dot it
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