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Diffstat (limited to 'results/classifier/qwen3:32b/reasoning/runtime/1840922')
| -rw-r--r-- | results/classifier/qwen3:32b/reasoning/runtime/1840922 | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/results/classifier/qwen3:32b/reasoning/runtime/1840922 b/results/classifier/qwen3:32b/reasoning/runtime/1840922 new file mode 100644 index 00000000..f93f91ea --- /dev/null +++ b/results/classifier/qwen3:32b/reasoning/runtime/1840922 @@ -0,0 +1,13 @@ +<think> +Okay, let's try to figure out what's going on here. The user is getting an unhandled CPU exception 0x8 when running a test case with QEMU's arm emulator targeting a cortex-m33. The test case is from GCC's testsuite, and it works at -O2 but crashes at -Os. The error message mentions an exception 0x8, which on ARM typically corresponds to a Prefetch Abort or Data Abort, but I need to check. + +First, looking at the exception number. On ARM, exception vectors are numbered. For example, exception 0x8 might be a Data Abort. For Cortex-M33, which is an ARMv8-M architecture, the exception numbers might differ slightly. But in general, exceptions like 0x8 are often related to memory access issues. The stack trace shows R15 (PC) is at fffeaf5c, and the XPSR (Program Status Register) has some flags set. The user mentions that the test uses nested functions, which generate trampolines on the stack. Trampolines involve creating executable code on the stack, which can lead to issues if the stack isn't executable or if there's an invalid memory access. + +The problem occurs with -Os (optimize for size) but not with -O2. This suggests that the optimization level changes the code generation in a way that leads to an invalid instruction or memory access. Since the test case works at -O2, maybe the trampoline is generated correctly there, but with -Os, perhaps the code is different, leading to an invalid PC value or an attempt to execute non-executable memory. However, in bare-metal environments, the stack is usually executable, but maybe the QEMU setup isn't allowing that. Alternatively, the generated code might have an invalid address in the PC, causing a Prefetch Abort when trying to fetch an instruction from an invalid location. + +Looking at the registers, R15 is fffeaf5c. The address 0xfffeaf5c might be within a memory area that isn't properly mapped or isn't executable in QEMU's simulation. But why would that happen? If the trampoline is placed on the stack, but the stack isn't set up correctly, or if the code generated for -Os points to an invalid location. The error message also says "handle_cpu_signal received signal outside vCPU context @ pc=0x6033c908". That address (0x6033c908) seems to be a host address, which might be a host-side error, but the exception is in the guest. Maybe the guest PC is invalid, leading to a signal that QEMU can't handle. + +Since the issue seems to be related to the generated code (due to optimization level) leading to an invalid memory access or instruction fetch, and the exception is a CPU exception (not a syscall), this would fall under the 'instruction' category if it's an invalid instruction, or 'runtime' if it's a memory access issue. However, the exception 0x8 is typically a Data Abort, which is a runtime error. But the user is asking to classify this as instruction, syscall, or runtime. Since the problem arises from the code execution (like invalid memory access during runtime), it's likely a runtime error. However, if the issue is an invalid instruction, like the trampoline code is incorrect, leading to an undefined instruction, that would be an instruction category. But the exception 0x8 on ARM is usually a Data Abort (memory access problem), which is a runtime error. Therefore, the category is 'runtime'. +</think> + +runtime \ No newline at end of file |