Bug#634261: iceweasel 5.0 does not start on sparc, bus error
tags 634261 + upstream quit Hi Mike, FYI: Jurij Smakov wrote: For the record, I do not consider this bug to be RC. As far as I know, it only manifested itself for iceweasel and only because iceweasel does really funky things with its symbols. The bug now contains enough information for a useful upstream report, however I don't intend to file one. Thanks, both. Jonathan -- To UNSUBSCRIBE, email to debian-glibc-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20120409022448.GA10727@burratino
Bug#634261: iceweasel 5.0 does not start on sparc, bus error
On Tue, Jul 19, 2011 at 06:15:31PM +0200, Mike Hommey wrote: On Tue, Jul 19, 2011 at 05:52:28PM +0200, Aurelien Jarno wrote: On Mon, Jul 18, 2011 at 11:52:49AM +0200, Mike Hommey wrote: reassign 634261 libc6 thanks On Mon, Jul 18, 2011 at 12:34:48PM +0300, Aleksi Suhonen wrote: Package: iceweasel Version: 5.0-3 Severity: grave The new iceweasel fails to start on sparc64. It crashes before it gets anywhere, so removing ~/.mozilla has no effect. Here's some debugging output: Is that the sparc64 build or the sparc build? (gdb) run Starting program: /usr/lib/iceweasel/firefox-bin [Thread debugging using libthread_db enabled] Program received signal SIGBUS, Bus error. 0xf7d57718 in _IO_default_setbuf (fp=0xf7e57114, p=0x0, len=0) at genops.c:575 575 genops.c: No such file or directory. in genops.c (gdb) bt #0 0xf7d57718 in _IO_default_setbuf (fp=0xf7e57114, p=0x0, len=0) at genops.c:575 #1 0xf7e161f4 in _IO_old_file_setbuf (fp=0xf7e57114, p=0x0, len=0) at oldfileops.c:265 #2 0xf7d4ba68 in _IO_setbuffer (fp=0xf7e57114, buf=0x0, size=value optimized out) at iosetbuffer.c:44 #3 0xf67d8e34 in XRE_main (argc=1, argv=0xda44, aAppData=0xf79347c0) at ../../../toolkit/xre/nsAppRunner.cpp:2780 Note this line is: SetupErrorHandling(argv[0]); which actually does: setbuf(stdout, 0); So the top frames are in the libc. That suggests a serious problem with the libc. The problem is caused by the following code (genops.c:575): fp-_IO_write_base = fp-_IO_write_ptr = fp-_IO_write_end = 0; Translated by the compiler into: 0xf7d57714 +148: clr [ %i0 + 0x18 ] 0xf7d57718 +152: clrx [ %i0 + 0x10 ] In other words by a 32-bit access and a 64-bit access. The compiler is allowed on sparc, as malloc is guaranteed to return 8-byte memory. The thing I still don't understand here, is why fp = stdout = 0xf7e57114 is not aligned. fopen() is using malloc() internally, so the resulting pointer should be aligned. Does iceweasel play with the alignment in a bad way there? I don't expect it to, especially with stdout, and especially during startup (the crash is in the very startup, not a lot of iceweasel is initialized). And stdout is a symbol exported from libc.so.6. FYI, I found that it is triggered by the _IO_stdin_used symbol not being exported from the binary, which happened because of a version-script couple with -rdynamic. I still think there is something fishy going on on the libc6 side, but not as bad as originally thought. Mike -- To UNSUBSCRIBE, email to debian-glibc-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/2008235538.ga4...@glandium.org
Bug#634261: iceweasel 5.0 does not start on sparc, bus error
On Mon, Jul 18, 2011 at 11:52:49AM +0200, Mike Hommey wrote: reassign 634261 libc6 thanks On Mon, Jul 18, 2011 at 12:34:48PM +0300, Aleksi Suhonen wrote: Package: iceweasel Version: 5.0-3 Severity: grave The new iceweasel fails to start on sparc64. It crashes before it gets anywhere, so removing ~/.mozilla has no effect. Here's some debugging output: Is that the sparc64 build or the sparc build? (gdb) run Starting program: /usr/lib/iceweasel/firefox-bin [Thread debugging using libthread_db enabled] Program received signal SIGBUS, Bus error. 0xf7d57718 in _IO_default_setbuf (fp=0xf7e57114, p=0x0, len=0) at genops.c:575 575 genops.c: No such file or directory. in genops.c (gdb) bt #0 0xf7d57718 in _IO_default_setbuf (fp=0xf7e57114, p=0x0, len=0) at genops.c:575 #1 0xf7e161f4 in _IO_old_file_setbuf (fp=0xf7e57114, p=0x0, len=0) at oldfileops.c:265 #2 0xf7d4ba68 in _IO_setbuffer (fp=0xf7e57114, buf=0x0, size=value optimized out) at iosetbuffer.c:44 #3 0xf67d8e34 in XRE_main (argc=1, argv=0xda44, aAppData=0xf79347c0) at ../../../toolkit/xre/nsAppRunner.cpp:2780 Note this line is: SetupErrorHandling(argv[0]); which actually does: setbuf(stdout, 0); So the top frames are in the libc. That suggests a serious problem with the libc. The problem is caused by the following code (genops.c:575): fp-_IO_write_base = fp-_IO_write_ptr = fp-_IO_write_end = 0; Translated by the compiler into: 0xf7d57714 +148: clr [ %i0 + 0x18 ] 0xf7d57718 +152: clrx [ %i0 + 0x10 ] In other words by a 32-bit access and a 64-bit access. The compiler is allowed on sparc, as malloc is guaranteed to return 8-byte memory. The thing I still don't understand here, is why fp = stdout = 0xf7e57114 is not aligned. fopen() is using malloc() internally, so the resulting pointer should be aligned. Does iceweasel play with the alignment in a bad way there? -- Aurelien Jarno GPG: 1024D/F1BCDB73 aurel...@aurel32.net http://www.aurel32.net -- To UNSUBSCRIBE, email to debian-glibc-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20110719155228.ga15...@volta.aurel32.net
Bug#634261: iceweasel 5.0 does not start on sparc, bus error
On Tue, Jul 19, 2011 at 05:52:28PM +0200, Aurelien Jarno wrote: On Mon, Jul 18, 2011 at 11:52:49AM +0200, Mike Hommey wrote: reassign 634261 libc6 thanks On Mon, Jul 18, 2011 at 12:34:48PM +0300, Aleksi Suhonen wrote: Package: iceweasel Version: 5.0-3 Severity: grave The new iceweasel fails to start on sparc64. It crashes before it gets anywhere, so removing ~/.mozilla has no effect. Here's some debugging output: Is that the sparc64 build or the sparc build? (gdb) run Starting program: /usr/lib/iceweasel/firefox-bin [Thread debugging using libthread_db enabled] Program received signal SIGBUS, Bus error. 0xf7d57718 in _IO_default_setbuf (fp=0xf7e57114, p=0x0, len=0) at genops.c:575 575 genops.c: No such file or directory. in genops.c (gdb) bt #0 0xf7d57718 in _IO_default_setbuf (fp=0xf7e57114, p=0x0, len=0) at genops.c:575 #1 0xf7e161f4 in _IO_old_file_setbuf (fp=0xf7e57114, p=0x0, len=0) at oldfileops.c:265 #2 0xf7d4ba68 in _IO_setbuffer (fp=0xf7e57114, buf=0x0, size=value optimized out) at iosetbuffer.c:44 #3 0xf67d8e34 in XRE_main (argc=1, argv=0xda44, aAppData=0xf79347c0) at ../../../toolkit/xre/nsAppRunner.cpp:2780 Note this line is: SetupErrorHandling(argv[0]); which actually does: setbuf(stdout, 0); So the top frames are in the libc. That suggests a serious problem with the libc. The problem is caused by the following code (genops.c:575): fp-_IO_write_base = fp-_IO_write_ptr = fp-_IO_write_end = 0; Translated by the compiler into: 0xf7d57714 +148: clr [ %i0 + 0x18 ] 0xf7d57718 +152: clrx [ %i0 + 0x10 ] In other words by a 32-bit access and a 64-bit access. The compiler is allowed on sparc, as malloc is guaranteed to return 8-byte memory. The thing I still don't understand here, is why fp = stdout = 0xf7e57114 is not aligned. fopen() is using malloc() internally, so the resulting pointer should be aligned. Does iceweasel play with the alignment in a bad way there? I don't expect it to, especially with stdout, and especially during startup (the crash is in the very startup, not a lot of iceweasel is initialized). And stdout is a symbol exported from libc.so.6. Mike -- To UNSUBSCRIBE, email to debian-glibc-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20110719161531.ga17...@glandium.org
Processed: Re: Bug#634261: iceweasel 5.0 does not start on sparc, bus error
Processing commands for cont...@bugs.debian.org: reassign 634261 libc6 Bug #634261 [iceweasel] iceweasel 5.0 does not start on sparc, bus error Bug reassigned from package 'iceweasel' to 'libc6'. Bug No longer marked as found in versions iceweasel/5.0-3. thanks Stopping processing here. Please contact me if you need assistance. -- 634261: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=634261 Debian Bug Tracking System Contact ow...@bugs.debian.org with problems -- To UNSUBSCRIBE, email to debian-glibc-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/handler.s.c.13109827815816.transcr...@bugs.debian.org
