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Diffstat (limited to 'results/classifier/deepseek-2/reasoning/mistranslation/1915327')
| -rw-r--r-- | results/classifier/deepseek-2/reasoning/mistranslation/1915327 | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/results/classifier/deepseek-2/reasoning/mistranslation/1915327 b/results/classifier/deepseek-2/reasoning/mistranslation/1915327 new file mode 100644 index 000000000..d37537fa5 --- /dev/null +++ b/results/classifier/deepseek-2/reasoning/mistranslation/1915327 @@ -0,0 +1,19 @@ +<think> +Alright, let's try to figure out how to classify this bug report. The user provided a detailed scenario where QEMU isn't behaving as expected with the `cmpxchg` instruction on x86_64 systems. + +First, I need to understand what the issue is. The problem occurs when using the `cmpxchg` (compare and exchange) instruction in QEMU's TCG. The user provided a C program that uses inline assembly to test this behavior. When compiled natively, the program works as expected, but under QEMU, it doesn't. + +The key point is that on real hardware, if the values being compared are equal, the `cmpxchg` instruction shouldn't change the accumulator (RAX in this case). However, QEMU is zero-extending EAX to RAX incorrectly, which changes the value of RAX when it shouldn't. + +Now, looking at the possible categories: mistranslation, assembly lowering, and others. + +The bug report mentions that the issue arises from the TCG (Translation Coupled Guest) part of QEMU not correctly emulating the `cmpxchg` instruction. This suggests that there's an incorrect semantic mapping from the source architecture (x86_64) to the target, which in this case is likely a different architecture or perhaps the same but handled incorrectly in TCG. + +Since the problem lies in how the instruction is being translated and executed in QEMU's TCG, the category should be 'mistranslation'. This points directly to an issue in the translation process rather than assembly lowering or other categories. +</think> + +The bug report indicates a misbehavior in QEMU's TCG when handling the `cmpxchg` instruction. Specifically, QEMU incorrectly modifies the RAX register by zero-extending EAX, whereas the expected behavior is that RAX should remain unchanged if the comparison is successful. + +This issue stems from an incorrect translation of the x86_64 instruction semantics in QEMU's TCG layer, leading to an improper handling of the operation. Therefore, the category for this bug report is: + +mistranslation \ No newline at end of file |