[PATCH] D14336: [tsan] Fix the memcpy interceptor to be memmove compatible on OS X

[Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL252162: [tsan] Fix the memcpy interceptor to be memmove compatible on OS X (authored by kuba.brecka).

Changed prior to commit:
  http://reviews.llvm.org/D14336?vs=39334&id=39358#toc

Repository:
  rL LLVM

http://reviews.llvm.org/D14336

Files:
  compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc

Index: compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc
===================================================================
--- compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc
+++ compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc
@@ -626,7 +626,10 @@
     MemoryAccessRange(thr, pc, (uptr)dst, size, true);
     MemoryAccessRange(thr, pc, (uptr)src, size, false);
   }
-  return internal_memcpy(dst, src, size);
+  // On OS X, calling internal_memcpy here will cause memory corruptions,
+  // because memcpy and memmove are actually aliases of the same implementation.
+  // We need to use internal_memmove here.
+  return internal_memmove(dst, src, size);
 }
 
 TSAN_INTERCEPTOR(void*, memmove, void *dst, void *src, uptr n) {


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