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authorChristian Krinitsin <mail@krinitsin.com>2025-07-06 16:43:19 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-07-06 16:43:19 +0000
commit238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd (patch)
treecd8a1b75ba7b3543eb7fe6857f408e7be4d9fd0b /results/classifier/deepseek-r1:32b/reasoning/runtime/1773743
parent96049c939b1916d80532630d63c14e04d5244f1d (diff)
downloademulator-bug-study-238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd.tar.gz
emulator-bug-study-238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd.zip
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+<think>
+Okay, I'm trying to classify this bug report into one of three categories: instruction, syscall, or runtime. Let's break down what the user described.
+
+The issue occurs when using QEMU with specific options and then attaching GDB. The command `qemu-x86_64` is run with `-E LD_PROFILE=libc.so.6` which seems to enable profiling for a library, `-g 12345` sets up a gdbserver, and `-L /` specifies the root directory. Then, in another window, GDB connects to this server and continues execution.
+
+The problem is that QEMU segfaults when `sigprof` is passed to GDB. The user mentions that they patched `gdbstub.c` to ignore `SIGPROF`, which stops the segmentation fault but means they can't catch profiling signals in GDB anymore.
+
+So, what's happening here? Profiling involves sending `SIGPROF` signals when certain events happen (like function calls). When QEMU is running under a debugger (GDB), it might mishandle these signals. The issue isn't with the instruction execution or a specific system call but rather how signals are being processed at runtime.
+
+The crash happens during runtime due to improper handling of `SIGPROF` signals, which suggests that the bug falls under runtime errors.
+</think>
+
+runtime
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