diff options
Diffstat (limited to 'results/classifier/deepseek-1/reasoning/qemu-sh4./1735384')
| -rw-r--r-- | results/classifier/deepseek-1/reasoning/qemu-sh4./1735384 | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/results/classifier/deepseek-1/reasoning/qemu-sh4./1735384 b/results/classifier/deepseek-1/reasoning/qemu-sh4./1735384 deleted file mode 100644 index c879498b1..000000000 --- a/results/classifier/deepseek-1/reasoning/qemu-sh4./1735384 +++ /dev/null @@ -1,38 +0,0 @@ -<think> -Okay, let's break down what I'm seeing here. So, there are a couple of emails talking about a bug in QEMU related to running Java on the sh4 architecture using qemu-sh4. The user Adrian is reporting that after some changes in QEMU, when he tried to run `java -version`, it resulted in a segmentation fault. - -First, I notice that Alex Bennée provided a patch to fix this issue. The patch modifies the file `target/sh4/translate.c`. The change involves adding a condition before freeing a TCG temporary variable. Specifically, the line was changed from: - -if (op_src < 0) { - -to - -if (op_src < 0 && !TCGV_IS_UNUSED(op_arg)) { - -This means that now, the code only frees `op_arg` if it's not unused. - -Adrian then confirms that with this fix, Java works fine again. He provided an output showing that running `java --version` no longer causes a crash but instead gives the correct version information. - -I'm thinking about why this change was necessary. It seems that in some cases, when debugging was enabled, there was a problem with TCG temps. By adding the condition to check if `op_arg` is not unused before freeing it, we avoid releasing something that might still be needed elsewhere, which was causing the segfault. - -It's also important to note that without this fix, running Java under qemu-sh4 would crash because of an issue related to TCG (Translation Coverage) in QEMU. The problem was reported as a regression after some changes, so it's crucial to ensure such regressions are fixed promptly. - -In summary, the key steps here are understanding the bug report, applying the provided patch correctly, and confirming through testing that the fix resolves the issue without introducing new problems. -</think> - -The issue described is related to running Java on the SH4 architecture using QEMU. A regression introduced a segmentation fault when executing `java -version`. The problem was identified in the translation of SH4 instructions within QEMU's codebase. - -**Solution:** -A patch was applied to modify the condition under which TCG temporary variables are freed. This ensures that only unused TCG temps are released, preventing the segfault. - -**Fix Details:** - -- **File:** `target/sh4/translate.c` -- **Change:** Modified line 2189 from `if (op_src < 0)` to `if (op_src < 0 && !TCGV_IS_UNUSED(op_arg))`. - -**Outcome:** -The fix was tested and confirmed successful, allowing Java to run without errors. The updated QEMU code now handles TCG temps correctly, avoiding the segmentation fault. - ---- - -This issue has been resolved with the applied patch, ensuring compatibility and stability when running OpenJDK JVM on qemu-sh4. \ No newline at end of file |