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-rw-r--r--test/msan/memcmp_test.cc15
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diff --git a/test/msan/memcmp_test.cc b/test/msan/memcmp_test.cc
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+++ b/test/msan/memcmp_test.cc
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+// RUN: %clangxx_msan -O0 -g %s -o %t
+// RUN: not %run %t 2>&1 | FileCheck %s
+// RUN: MSAN_OPTIONS=intercept_memcmp=0 %run %t
+
+#include <string.h>
+int main(int argc, char **argv) {
+ char a1[4];
+ char a2[4];
+ for (int i = 0; i < argc * 3; i++)
+ a2[i] = a1[i] = i;
+ int res = memcmp(a1, a2, 4);
+ return res;
+ // CHECK: Uninitialized bytes in __interceptor_memcmp at offset 3
+ // CHECK: MemorySanitizer: use-of-uninitialized-value
+}