Index: lib/asan/asan_mac.cc
===================================================================
--- lib/asan/asan_mac.cc
+++ lib/asan/asan_mac.cc
@@ -114,7 +114,7 @@
       internal_strlen(dyld_insert_libraries) : 0;
   uptr fname_len = internal_strlen(info.dli_fname);
   if (!dyld_insert_libraries ||
-      !REAL(strstr)(dyld_insert_libraries, info.dli_fname)) {
+      !REAL(strstr)(dyld_insert_libraries, StripModuleName(info.dli_fname))) {
     // DYLD_INSERT_LIBRARIES is not set or does not contain the runtime
     // library.
     char program_name[1024];
Index: test/asan/TestCases/Darwin/dyld_insert_libraries_reexec.cc
===================================================================
--- test/asan/TestCases/Darwin/dyld_insert_libraries_reexec.cc
+++ test/asan/TestCases/Darwin/dyld_insert_libraries_reexec.cc
@@ -0,0 +1,33 @@
+// When DYLD-inserting the ASan dylib from a different location than the
+// original, make sure we don't try to reexec.
+
+// RUN: mkdir -p %T/dyld_insert_libraries_reexec
+// RUN: cp `%clang_asan %s -fsanitize=address -### 2>&1 \
+// RUN:   | grep "libclang_rt.asan_osx_dynamic.dylib" \
+// RUN:   | sed -e 's/.*"\(.*libclang_rt.asan_osx_dynamic.dylib\)".*/\1/'` \
+// RUN:   %T/dyld_insert_libraries_reexec/libclang_rt.asan_osx_dynamic.dylib
+// RUN: %clangxx_asan %s -o %T/dyld_insert_libraries_reexec/a.out
+// RUN: DYLD_INSERT_LIBRARIES=@executable_path/libclang_rt.asan_osx_dynamic.dylib \
+// RUN:   ASAN_OPTIONS=verbosity=1 %run %T/dyld_insert_libraries_reexec/a.out 2>&1 \
+// RUN:   | FileCheck %s
+// RUN: ASAN_OPTIONS=verbosity=1 %run %T/dyld_insert_libraries_reexec/a.out 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-NOINSERT %s
+
+#include <stdio.h>
+
+int main() {
+  printf("Passed\n");
+  return 0;
+}
+
+// CHECK-NOINSERT: Parsed ASAN_OPTIONS: verbosity=1
+// CHECK-NOINSERT: exec()-ing the program with
+// CHECK-NOINSERT: DYLD_INSERT_LIBRARIES
+// CHECK-NOINSERT: to enable ASan wrappers.
+// CHECK-NOINSERT: Passed
+
+// CHECK: Parsed ASAN_OPTIONS: verbosity=1
+// CHECK-NOT: exec()-ing the program with
+// CHECK-NOT: DYLD_INSERT_LIBRARIES
+// CHECK-NOT: to enable ASan wrappers.
+// CHECK: Passed