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Diffstat (limited to 'results/classifier/gemma3:27b/syscall/1895305')
| -rw-r--r-- | results/classifier/gemma3:27b/syscall/1895305 | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/results/classifier/gemma3:27b/syscall/1895305 b/results/classifier/gemma3:27b/syscall/1895305 new file mode 100644 index 000000000..7776d39c2 --- /dev/null +++ b/results/classifier/gemma3:27b/syscall/1895305 @@ -0,0 +1,51 @@ + + + +pthread_cancel fails with "RT33" with musl libc + +From my testing it seems that QEMU built against musl libc crashes on pthread_cancel cancel calls - if the binary is also built with musl libc. + +Minimal sample: + +#include <pthread.h> +#include <stdio.h> +#include <unistd.h> +void* threadfunc(void* ignored) { + while (1) { + pause(); + } + return NULL; +} +int main() { + pthread_t thread; + pthread_create(&thread, NULL, &threadfunc, NULL); + sleep(1); + pthread_cancel(thread); + printf("OK, alive\n"); +} + +In an Alpine Linux aarch64 chroot (on an x86_64 host) the binary will just output RT33 and has exit code 161. + +Using qemu-aarch64 on an x86_64 host results in the output (fish shell) + fish: “qemu-aarch64-static ./musl-stat…” terminated by signal Unknown (Unknown) +or (bash) + Real-time signal 2 + +and exit code 164. + +It doesn't matter whether the binary is linked dynamically or static. You can see my test results in the following table: + +| | QEMU glibc | QEMU musl | +|----------------------|------------|-----------| +| binary glibc dynamic | ✓ | ✓ | +| binary glibc static | ✓ | ✓ | +| binary musl dynamic | ✓ | ✗ | +| binary musl static | ✓ | ✗ | + +Both QEMU builds are v5.1.0 (glibc v2.32 / musl v1.2.1) + +I've uploaded all my compile and test commands (plus a script to conveniently run them all) to https://github.com/z3ntu/qemu-pthread_cancel . It also includes the built binaries if needed. The test script output can be found at https://github.com/z3ntu/qemu-pthread_cancel/blob/master/results.txt + +Further links: +- https://gitlab.com/postmarketOS/pmaports/-/issues/190#note_141902075 +- https://gitlab.com/postmarketOS/pmbootstrap/-/issues/1970 \ No newline at end of file |