[Bug target/37750] a lot of crashes with tree optimizations on mingw
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 Resolution||FIXED --- Comment #14 from Andrew Pinski pinskia at gcc dot gnu.org 2012-01-13 06:48:24 UTC --- alloca has been fixed already so closing as fixed.
[Bug target/37750] a lot of crashes with tree optimizations on mingw
--- 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 compiled at at least -O1. This causes libevent to use the edi register whose value is corrupted (set to null, actually) by a callback into our C++ program. The C++ app seems to use the edi register at any optimisation level and in any case seems to push it onto the stack and pop it off at the end of the callback, but some kind of stack corruption goes on within the callback that means the value popped off the stack at the end is zero when the app is compiled at -O1. Compiling the app at -O0 or at -O1 with -fno-dce prevents the crash, although compiling with -O2 -fno-dce causes the same crash. -- dbkr at mxtelecom dot com changed: What|Removed |Added CC||dbkr at mxtelecom dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37750
[Bug target/37750] a lot of crashes with tree optimizations on mingw
--- 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 here -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37750
[Bug target/37750] a lot of crashes with tree optimizations on mingw
--- 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 switched to 4.5 when it started to work on mingw -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37750
[Bug target/37750] a lot of crashes with tree optimizations on mingw
--- 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 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37750
[Bug target/37750] a lot of crashes with tree optimizations on mingw
--- 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 Status|UNCONFIRMED |WAITING http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37750
[Bug target/37750] a lot of crashes with tree optimizations on mingw
--- 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
[Bug target/37750] a lot of crashes with tree optimizations on mingw
--- 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 0x005c7462 in get_dc (s=0x6230030, mb_x=0, mb_y=0, plane_index=0) at libavcodec/snow.c:2426 #2 0x005cff6a in iterative_me (s=0x6230030) at libavcodec/snow.c:3126 #3 0x005d7467 in encode_blocks (s=0x6230030, search=1) at libavcodec/snow.c:2074 #4 0x005d7a2a in encode_frame (avctx=0x5aa3f90, buf=0x5fe06c0 BINARY DATA REMOVED..., buf_size=262144, data=0x22eda8) at libavcodec/snow.c:4268 #5 0x00499513 in avcodec_encode_video (avctx=0x5aa3f90, buf=0x5fe06c0 BINARY DATA REMOVED..., buf_size=262144, pict=0x22eda8) at libavcodec/utils.c:894 #6 0x00405626 in output_packet (ist=0x5ed6450, ist_index=0, ost_table=0x5aa4390, nb_ostreams=1, pkt=0x22fed8) at ffmpeg.c:954 #7 0x00409269 in av_encode (output_files=0xb6b378, nb_output_files=1, input_files=0xb6a608, nb_input_files=1, stream_maps=0xb6b3c8, nb_stream_maps=0) at ffmpeg.c:2116 #8 0x00409761 in main (argc=Cannot access memory at address 0x0 ) at ffmpeg.c:3888 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37750
[Bug target/37750] a lot of crashes with tree optimizations on mingw
--- 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 (avctx=0x5aa3f20, buf=0x5fda480 BINARY DATA REMOVED..., buf_size=405504, data=0x22eda8) at libavcodec/snow.c:2426 #2 0x00499513 in avcodec_encode_video (avctx=0x5aa3f20, buf=0x5fda480 BINARY DATA REMOVED..., buf_size=405504, pict=0x22eda8) at libavcodec/utils.c:894 #3 0x00405626 in output_packet (ist=0x5ed6450, ist_index=0, ost_table=0x5cd6470, nb_ostreams=1, pkt=0x22fed8) at ffmpeg.c:954 #4 0x00409269 in av_encode (output_files=0xb6b378, nb_output_files=1, input_files=0xb6a608, nb_input_files=1, stream_maps=0xb6b3c8, nb_stream_maps=0) at ffmpeg.c:2116 #5 0x00409761 in main (argc=95043360, argv=0x3f4998) at ffmpeg.c:3888 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37750
[Bug target/37750] a lot of crashes with tree optimizations on mingw
--- 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, src_plane=0x5ac9fa0 BINARY DATA REMOVED..., ref_plane=0x6063010 '\200' repeats 200 times..., decoded_plane=0x6089300 '\200' repeats 200 times..., width=352, height=288, src_stride=352, stride=416) at libavcodec/svq1enc.c:363 #2 0x005e467a in svq1_encode_frame (avctx=0x5aa3eb0, buf=0x5fe05a0 , buf_size=405504, data=0x22eda8) at libavcodec/svq1enc.c:541 #3 0x00499513 in avcodec_encode_video (avctx=0x5aa3eb0, buf=0x5fe05a0 , buf_size=405504, pict=0x22eda8) at libavcodec/utils.c:894 #4 0x00405626 in output_packet (ist=0x5ed6450, ist_index=0, ost_table=0x5ac9e00, nb_ostreams=1, pkt=0x22fed8) at ffmpeg.c:954 #5 0x00409269 in av_encode (output_files=0xb6b378, nb_output_files=1, input_files=0xb6a608, nb_input_files=1, stream_maps=0xb6b3c8, nb_stream_maps=0) at ffmpeg.c:2116 #6 0x00409761 in main (argc=Cannot access memory at address 0x100 ) at ffmpeg.c:3888 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37750
[Bug target/37750] a lot of crashes with tree optimizations on mingw
--- 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
[Bug target/37750] a lot of crashes with tree optimizations on mingw
--- 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 -g3 -Wdeclaration-after-statement -Wall -Wno-switch -Wdisabled-optimization -Wpointer-arith -Wredundant-decls -Wno-pointer-sign -Wcast-qual -Wwrite-strings -Wtype-limits -O2 -fno-math-errno -fno-signed-zeros -O3 -fno-common -march=native -mtune=native -pipe where added by me (-fno-common is needed to avoid crash in sse code) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37750
[Bug target/37750] a lot of crashes with tree optimizations on mingw
--- 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 CC||pinskia at gcc dot gnu dot ||org Severity|critical|normal Component|tree-optimization |target Keywords||wrong-code http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37750
[Bug target/37750] a lot of crashes with tree optimizations on mingw
--- 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
