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Diffstat (limited to 'results/classifier/deepseek-r1:32b/reasoning/instruction/1967248')
| -rw-r--r-- | results/classifier/deepseek-r1:32b/reasoning/instruction/1967248 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/results/classifier/deepseek-r1:32b/reasoning/instruction/1967248 b/results/classifier/deepseek-r1:32b/reasoning/instruction/1967248 new file mode 100644 index 00000000..f639db29 --- /dev/null +++ b/results/classifier/deepseek-r1:32b/reasoning/instruction/1967248 @@ -0,0 +1,21 @@ +<think> +Alright, let's try to figure out what's going on here. The user is encountering an issue when running their a.out_err binary under QEMU. They get a core dump with the message "qemu: uncaught target signal 5 (Trace/breakpoint trap)". However, when they use GDB for remote debugging, the program exits normally without any issues. + +First, I need to understand what each of these tools is doing. QEMU is an emulator that runs binaries for different architectures, in this case, a 32-bit ARM binary. When the user says it's core dumping, that suggests something unexpected is happening during execution, causing the program to crash. + +Looking at the provided disassembly of the binary, I see that there's a 'bkpt' instruction at address 0xa608. The 'bkpt' instruction in ARM is used for debugging purposes and generates a software breakpoint exception. In normal circumstances, when QEMU runs this instruction without a debugger attached, it should generate a SIGTRAP signal to the host process, which would typically cause a core dump if not handled. + +However, the user mentioned that when using GDB for remote debugging, everything works fine. That makes sense because GDB catches these breakpoints and allows the user to debug, so no crash occurs. But without GDB attached, QEMU should handle the breakpoint in some way, perhaps by ignoring it or translating it correctly into a signal. + +The user also checked a bug report on Launchpad (bug 1873898) related to QEMU's handling of BKPT instructions and found that the issue was supposed to be fixed. However, they're still experiencing problems with core dumps, which suggests either the fix isn't applied in their version of QEMU or there's a different underlying issue. + +Looking at the ELF header information provided, the binary is indeed a 32-bit ARM executable with specific ABI flags. The entry point is at address 0xa603, and the program headers look correct. This tells me that the binary itself is correctly formatted for an ARM target. + +The QEMU version they're using is 6.2.0, which might be older or newer than the version where the bug was fixed. If the bug was fixed in a later version, they might need to update their QEMU installation. Alternatively, if the issue persists despite the fix being applied, there could be another problem. + +Considering possible categories for this bug: instruction, syscall, or runtime. The issue seems to revolve around how QEMU handles the 'bkpt' instruction when not running under a debugger. Since the problem arises during execution due to an unhandled exception generated by an ARM instruction (BKPT), it falls under the category of an instruction-related fault. + +So, putting it all together: the bug is likely due to QEMU's incorrect handling of the BKPT instruction in 32-bit ARM Linux-user mode when no debugger is attached. This causes a SIGTRAP signal that isn't properly managed, leading to a core dump. +</think> + +instruction \ No newline at end of file |