Index: compiler-rt/trunk/lib/asan/asan_malloc_mac.cc
===================================================================
--- compiler-rt/trunk/lib/asan/asan_malloc_mac.cc
+++ compiler-rt/trunk/lib/asan/asan_malloc_mac.cc
@@ -38,6 +38,9 @@
 #define COMMON_MALLOC_CALLOC(count, size) \
   GET_STACK_TRACE_MALLOC; \
   void *p = asan_calloc(count, size, &stack);
+#define COMMON_MALLOC_POSIX_MEMALIGN(memptr, alignment, size) \
+  GET_STACK_TRACE_MALLOC; \
+  int res = asan_posix_memalign(memptr, alignment, size, &stack);
 #define COMMON_MALLOC_VALLOC(size) \
   GET_STACK_TRACE_MALLOC; \
   void *p = asan_memalign(GetPageSizeCached(), size, &stack, FROM_MALLOC);
Index: compiler-rt/trunk/lib/lsan/lsan_allocator.h
===================================================================
--- compiler-rt/trunk/lib/lsan/lsan_allocator.h
+++ compiler-rt/trunk/lib/lsan/lsan_allocator.h
@@ -90,6 +90,8 @@
 
 AllocatorCache *GetAllocatorCache();
 
+int lsan_posix_memalign(void **memptr, uptr alignment, uptr size,
+                        const StackTrace &stack);
 void *lsan_memalign(uptr alignment, uptr size, const StackTrace &stack);
 void *lsan_malloc(uptr size, const StackTrace &stack);
 void lsan_free(void *p);
Index: compiler-rt/trunk/lib/lsan/lsan_allocator.cc
===================================================================
--- compiler-rt/trunk/lib/lsan/lsan_allocator.cc
+++ compiler-rt/trunk/lib/lsan/lsan_allocator.cc
@@ -128,6 +128,21 @@
   return m->requested_size;
 }
 
+int lsan_posix_memalign(void **memptr, uptr alignment, uptr size,
+                        const StackTrace &stack) {
+  if (UNLIKELY(!CheckPosixMemalignAlignment(alignment))) {
+    ReturnNullOrDieOnFailure::OnBadRequest();
+    return errno_EINVAL;
+  }
+  void *ptr = Allocate(stack, size, alignment, kAlwaysClearMemory);
+  if (UNLIKELY(!ptr))
+    // OOM error is already taken care of by Allocate.
+    return errno_ENOMEM;
+  CHECK(IsAligned((uptr)ptr, alignment));
+  *memptr = ptr;
+  return 0;
+}
+
 void *lsan_memalign(uptr alignment, uptr size, const StackTrace &stack) {
   if (UNLIKELY(!IsPowerOfTwo(alignment))) {
     errno = errno_EINVAL;
Index: compiler-rt/trunk/lib/lsan/lsan_interceptors.cc
===================================================================
--- compiler-rt/trunk/lib/lsan/lsan_interceptors.cc
+++ compiler-rt/trunk/lib/lsan/lsan_interceptors.cc
@@ -86,9 +86,7 @@
 INTERCEPTOR(int, posix_memalign, void **memptr, uptr alignment, uptr size) {
   ENSURE_LSAN_INITED;
   GET_STACK_TRACE_MALLOC;
-  *memptr = lsan_memalign(alignment, size, stack);
-  // FIXME: Return ENOMEM if user requested more than max alloc size.
-  return 0;
+  return lsan_posix_memalign(memptr, alignment, size, stack);
 }
 
 INTERCEPTOR(void*, valloc, uptr size) {
Index: compiler-rt/trunk/lib/lsan/lsan_malloc_mac.cc
===================================================================
--- compiler-rt/trunk/lib/lsan/lsan_malloc_mac.cc
+++ compiler-rt/trunk/lib/lsan/lsan_malloc_mac.cc
@@ -37,6 +37,9 @@
 #define COMMON_MALLOC_CALLOC(count, size) \
   GET_STACK_TRACE_MALLOC; \
   void *p = lsan_calloc(count, size, stack)
+#define COMMON_MALLOC_POSIX_MEMALIGN(memptr, alignment, size) \
+  GET_STACK_TRACE_MALLOC; \
+  int res = lsan_posix_memalign(memptr, alignment, size, stack)
 #define COMMON_MALLOC_VALLOC(size) \
   GET_STACK_TRACE_MALLOC; \
   void *p = lsan_valloc(size, stack)
Index: compiler-rt/trunk/lib/sanitizer_common/sanitizer_malloc_mac.inc
===================================================================
--- compiler-rt/trunk/lib/sanitizer_common/sanitizer_malloc_mac.inc
+++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_malloc_mac.inc
@@ -170,12 +170,8 @@
 INTERCEPTOR(int, posix_memalign, void **memptr, size_t alignment, size_t size) {
   COMMON_MALLOC_ENTER();
   CHECK(memptr);
-  COMMON_MALLOC_MEMALIGN(alignment, size);
-  if (p) {
-    *memptr = p;
-    return 0;
-  }
-  return -1;
+  COMMON_MALLOC_POSIX_MEMALIGN(memptr, alignment, size);
+  return res;
 }
 
 namespace {
Index: compiler-rt/trunk/lib/tsan/rtl/tsan_malloc_mac.cc
===================================================================
--- compiler-rt/trunk/lib/tsan/rtl/tsan_malloc_mac.cc
+++ compiler-rt/trunk/lib/tsan/rtl/tsan_malloc_mac.cc
@@ -15,6 +15,7 @@
 #include "sanitizer_common/sanitizer_platform.h"
 #if SANITIZER_MAC
 
+#include "sanitizer_common/sanitizer_errno.h"
 #include "tsan_interceptors.h"
 #include "tsan_stack_trace.h"
 
@@ -39,6 +40,15 @@
   if (cur_thread()->in_symbolizer) return InternalCalloc(count, size); \
   SCOPED_INTERCEPTOR_RAW(calloc, size, count);                         \
   void *p = user_calloc(thr, pc, size, count)
+#define COMMON_MALLOC_POSIX_MEMALIGN(memptr, alignment, size)      \
+  if (cur_thread()->in_symbolizer) {                               \
+    void *p = InternalAlloc(size, nullptr, alignment);             \
+    if (!p) return errno_ENOMEM;                                   \
+    *memptr = p;                                                   \
+    return 0;                                                      \
+  }                                                                \
+  SCOPED_INTERCEPTOR_RAW(posix_memalign, memptr, alignment, size); \
+  int res = user_posix_memalign(thr, pc, memptr, alignment, size);
 #define COMMON_MALLOC_VALLOC(size)                            \
   if (cur_thread()->in_symbolizer)                            \
     return InternalAlloc(size, nullptr, GetPageSizeCached()); \