Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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10.2(EOL), 10.3(EOL), 10.4(EOL), 10.5, 10.6, 10.7(EOL), 10.8(EOL), 10.9(EOL)
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Debian GNU/Linux AMD64, clang-13 or clang-14 -march=native -mtune=native
Description
On my system, 3 unit tests for performance_schema failed with SIGSEGV, on MariaDB Server 10.9. The reason turned out to be that the SIMD instruction MOVAPS was executed in create_thread() on a pointer that was only aligned to 128 bits (16 bytes), not the required 256 or 512 bits.
The reason turned out to be that the mocked up pfs_malloc() failed to return properly aligned memory (64 bytes or 512 bits in the case of AMD64):
diff --git a/storage/perfschema/unittest/stub_pfs_global.h b/storage/perfschema/unittest/stub_pfs_global.h
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index 8a1f9216ba2..3d7d818cc51 100644
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--- a/storage/perfschema/unittest/stub_pfs_global.h
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+++ b/storage/perfschema/unittest/stub_pfs_global.h
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@@ -24,6 +24,9 @@
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#include <my_sys.h>
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#include <pfs_global.h>
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#include <string.h>
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+#ifdef HAVE_MEMALIGN
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+# include <malloc.h>
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+#endif
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bool pfs_initialized= false;
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@@ -43,7 +46,15 @@ void *pfs_malloc(size_t size, myf)
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if (--stub_alloc_fails_after_count <= 0)
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return NULL;
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+#ifndef PFS_ALIGNEMENT
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void *ptr= malloc(size);
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+#elif defined HAVE_MEMALIGN
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+ void *ptr= memalign(PFS_ALIGNEMENT, size);
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+#elif defined HAVE_ALIGNED_MALLOC
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+ void *ptr= _aligned_malloc(size, PFS_ALIGNEMENT);
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+#else
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+# error "Missing implementation"
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+#endif
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if (ptr != NULL)
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memset(ptr, 0, size);
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return ptr; |