http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37750
Andrew Pinski pinskia at gcc dot gnu.org changed:
What|Removed |Added
Status|WAITING |RESOLVED
--- Comment #13 from dbkr at mxtelecom dot com 2010-05-25 12:09 ---
I've just run into this problem too with MinGW's packaged GCC 4.4.0. It was
working fine for some time but recently started crashing when both libevent and
the C++ program that libevent was calling back into were both
--- Comment #10 from ktietz at gcc dot gnu dot org 2009-06-24 10:17 ---
Does this issue appears also, when using builtin alloca version? As I noticed
does the switch -fno-builtin shows explict broken _alloca for x64. The
call-save area isn't adjusted and compiler seems not to take care
--- Comment #11 from sherpya at netfarm dot it 2009-06-24 11:42 ---
I'm using 4.5 from svn, with -O2 and looks like not affected
4.3 and 4.4 are almost unusable on mingw (at least my builds)
something changed in 4.5 branch,
I've not tested further 4.3 or .4.4 since I was using 4.2 then
--- Comment #12 from sherpya at netfarm dot it 2009-06-24 23:22 ---
however 4.5 is still far from being stable as 4.2, I get many crashes while
using complied mplayer (it's a stress test for gcc :))
Unfortunately I had no much time to debug mplayer builds
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--- Comment #3 from rguenth at gcc dot gnu dot org 2008-10-07 07:32 ---
As usual we would need preprocessed source as a testcase.
--
rguenth at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #5 from sherpya at netfarm dot it 2008-10-07 12:48 ---
*** Bug 37584 has been marked as a duplicate of this bug. ***
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37750
--- Comment #6 from sherpya at netfarm dot it 2008-10-07 13:23 ---
first bt, (pls tell me if you need output of leave temps, generated asm
preprocessed or other stuff)
Program received signal SIGSEGV, Segmentation fault.
0x0092c4c2 in _alloca ()
(gdb) bt
#0 0x0092c4c2 in _alloca ()
#1
--- Comment #8 from sherpya at netfarm dot it 2008-10-07 13:29 ---
another crash in snow, this time argc/argv is not screwed
Program received signal SIGSEGV, Segmentation fault.
0x0092c4c2 in _alloca ()
(gdb) bt
#0 0x0092c4c2 in _alloca ()
#1 0x005d7de7 in encode_frame
--- Comment #9 from sherpya at netfarm dot it 2008-10-07 13:35 ---
sqv1
Program received signal SIGSEGV, Segmentation fault.
0x0092c4c2 in _alloca ()
(gdb) bt
#0 0x0092c4c2 in _alloca ()
#1 0x005e3338 in svq1_encode_plane (s=0x5a9f2c0, plane=value optimized out,
--- Comment #4 from sherpya at netfarm dot it 2008-10-07 09:38 ---
unfortunately snow.c is a very big file, I'll try to find a shorter example,
but if the problem is in alloca() the generated asm will not be so usefull
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37750
--- Comment #7 from sherpya at netfarm dot it 2008-10-07 13:27 ---
compile flags
OPTFLAGS=-O3 -fno-common -g3 -march=native -mtune=native -pipe
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_ISOC99_SOURCE
-D_POSIX_C_SOURCE=200112 -fasm -std=c99 -fomit-frame-pointer -DPTW32_STATIC_LIB
--- Comment #1 from pinskia at gcc dot gnu dot org 2008-10-06 21:17 ---
No other target has this issue except Win32. I am going to say mingw support
for alloca is broken somehow.
--
pinskia at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #2 from sherpya at netfarm dot it 2008-10-06 22:34 ---
this problem started with 4.3, 4.3.2 on debian linux hasn't these problems
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37750
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