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Diffstat (limited to 'results/classifier/phi4:14b/output/manual-review/1909')
| -rw-r--r-- | results/classifier/phi4:14b/output/manual-review/1909 | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/results/classifier/phi4:14b/output/manual-review/1909 b/results/classifier/phi4:14b/output/manual-review/1909 new file mode 100644 index 000000000..5c8aa9308 --- /dev/null +++ b/results/classifier/phi4:14b/output/manual-review/1909 @@ -0,0 +1,53 @@ + + + +regression: 8.0.0 segfaults on coverage counter increment +Description of problem: +With qemu 8.0.0, my test program segfaults while incrementing a gcov counter: + +``` +Breakpoint 2, 0x00000000004bc9a8 in __CortexA53843419_464004 () +(gdb) x/2i $pc +=> 0x4bc9a8 <__CortexA53843419_464004>: str x8, [x9, #2512] + 0x4bc9ac <__CortexA53843419_464004+4>: b 0x464008 <mock_hyp_params_Destroy+24> +(gdb) p $x8 +$10 = 1 +(gdb) p $x9 +$11 = 5234688 +(gdb) x/x $x9+2512 +0x4fe9d0 <__llvm_gcov_ctr.5>: 0x00000000 +(gdb) stepi + +Program received signal SIGSEGV, Segmentation fault. +0x00000000004bc9a8 in __CortexA53843419_464004 () +(gdb) x/x $x9+2512 +0x4fe9d0 <__llvm_gcov_ctr.5>: 0x00000000 +(gdb) shell llvm-objdump --syms --arch-name=aarch64 ./build/gcov/out/test_hyp-props.out | grep 4fe9d0 +00000000004fe9d0 l O .bss 0000000000000008 __llvm_gcov_ctr.5 +(gdb) shell qemu-aarch64 --version +qemu-aarch64 version 8.0.0 +Copyright (c) 2003-2022 Fabrice Bellard and the QEMU Project developers +(gdb) +``` + +With qemu 6.2.0, it doesn't segfault (at least not at this point, you +may ignore the segfault at the end due to a bug in the test program). +``` +$ /usr/bin/qemu-aarch64 --version +qemu-aarch64 version 6.2.0 (Debian 1:6.2+dfsg-2ubuntu6.12) +Copyright (c) 2003-2021 Fabrice Bellard and the QEMU Project developers + +$ /usr/bin/qemu-aarch64 ./build/gcov/out/test_hyp-props.out +test_hyp-props.c:13:test__setup_str_prop:PASS +test_hyp-props.c:14:test__log_print_handler:PASS +test_hyp-props.c:15:test__setup_log_print_prop:PASS +test_hyp-props.c:16:test__vm_vcpu_abort_reset_handler:PASS +test_hyp-props.c:17:test__vm_info_alloc:PASS +test_hyp-props.c:18:test__memory_status_get:PASS +test_hyp-props.c:19:test__memory_status_get_fail:PASS +Segmentation fault (core dumped) +``` +Steps to reproduce: +1. Compile and link statically (with ld.lld) a test program, with clang, targetting aarch64 with: -target aarch64-linux-android -mcpu=cortex-a53, using --coverage option to generate gcov coverage. +2. Run it with qemu-aarch64 8.0.0 +3. Hopefully, it will segfault early for no good reason. |