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Diffstat (limited to 'results/classifier/108/debug/722311')
| -rw-r--r-- | results/classifier/108/debug/722311 | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/results/classifier/108/debug/722311 b/results/classifier/108/debug/722311 deleted file mode 100644 index f3fc6871..00000000 --- a/results/classifier/108/debug/722311 +++ /dev/null @@ -1,94 +0,0 @@ -debug: 0.967 -permissions: 0.966 -graphic: 0.951 -semantic: 0.950 -device: 0.949 -performance: 0.949 -socket: 0.944 -boot: 0.942 -PID: 0.941 -other: 0.939 -vnc: 0.919 -files: 0.909 -network: 0.902 -KVM: 0.885 - -Segmentation fault if started without -enable-kvm parameter - -I start qemu (Linux) from the same USB memory stick on several computers. Up to and including qemu 0.12.5, I could use or not use qemu's "-enable-kvm" command line parameter as appropriate for the hardware, and qemu would run. In contrast, qemu 0.13.0 and 0.14.0 segfault if started without "-enable-kvm". I get a black window appearing for fractions of a second, disappearing immediately, and then the error message "Segmentation fault". - -Hardware: Pentium 4, and Core 2 Duo. -Command line: either "qemu" or "qemu -enable-kvm" (after manually loading the kvm-intel module on the Core 2 Duo). -Reproducible: always. - -It is a bit weird that www.qemu.org tells me to report my bugs on launchpad, but replies to my bug report then appear ONLY on the developer mailing list. How shall a lowly end-user know that he must look there, too? - -Anyway. On the developer mailing list, Markus Armbruster (Mon, 21 Feb 2011 09:00:25 +0100) requested: - -> Stack backtrace, please! - -When recompiling qemu 0.14.0 with "--enable-debug" for that purpose I also played a bit with the CFLAGS. It turns out that qemu segfaults when compiled with "-Os" in the CFLAGS, but not when compiled without "-O<whatever>" in the CFLAGS. The GCC version is 4.5.2. - -I have now probably lost the audience. But nevermind, here is the stack backtrace from qemu compiled with "-Os": - -root [~/sandbox] gdb qemu -GNU gdb (GDB) 7.2 -Copyright (C) 2010 Free Software Foundation, Inc. -License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> -This is free software: you are free to change and redistribute it. -There is NO WARRANTY, to the extent permitted by law. Type "show copying" -and "show warranty" for details. -This GDB was configured as "i686-pc-linux-gnu". -For bug reporting instructions, please see: -<http://www.gnu.org/software/gdb/bugs/>... -Reading symbols from /usr/bin/qemu...done. -(gdb) r -Starting program: /usr/bin/qemu -[Thread debugging using libthread_db enabled] - -Program received signal SIGSEGV, Segmentation fault. -raise_interrupt (intno=13, is_int=0, error_code=8, next_eip_addend=0) - at /root/sandbox/stage4/qemu-0.14.0/target-i386/op_helper.c:1340 -1340 env->exception_index = intno; -(gdb) bt -#0 raise_interrupt (intno=13, is_int=0, error_code=8, next_eip_addend=0) - at /root/sandbox/stage4/qemu-0.14.0/target-i386/op_helper.c:1340 -#1 0x08146e13 in raise_exception_err (exception_index=13, error_code=8) - at /root/sandbox/stage4/qemu-0.14.0/target-i386/op_helper.c:1351 -#2 0xda9abe00 in ?? () -#3 0x00000000 in ?? () -(gdb) - - -and for comparison, the stack backtrace after compiling qemu with no CFLAGS at all: - -root [~/sandbox] gdb qemu -GNU gdb (GDB) 7.2 -Copyright (C) 2010 Free Software Foundation, Inc. -License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> -This is free software: you are free to change and redistribute it. -There is NO WARRANTY, to the extent permitted by law. Type "show copying" -and "show warranty" for details. -This GDB was configured as "i686-pc-linux-gnu". -For bug reporting instructions, please see: -<http://www.gnu.org/software/gdb/bugs/>... -Reading symbols from /usr/bin/qemu...done. -(gdb) r -Starting program: /usr/bin/qemu -[Thread debugging using libthread_db enabled] - -Program exited normally. -(gdb) bt -No stack. -(gdb) - - -The problem reported above was the same up to and including qemu 0.15.0. Meanwhile I found this on the LinuxFromScratch (LFS) bug tracker: - - "Glibc-2.14 causes segfaults in SDL", http://wiki.linuxfromscratch.org/lfs/ticket/2920 - -After applying their patch to GLIBC, qemu finally works again on the Pentium 4. As far as I am concerned, this bug report can now be closed. - - -Closing bug according to comment #2 - |