llvm-project/compiler-rt/test/asan/TestCases/memcmp_test.cc

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C++

// RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
// RUN: %clangxx_asan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
// RUN: %clangxx_asan -O2 %s -o %t && not %run %t 2>&1 | FileCheck %s
// RUN: %clangxx_asan -O3 %s -o %t && not %run %t 2>&1 | FileCheck %s
// REQUIRES: compiler-rt-optimized
#include <string.h>
int main(int argc, char **argv) {
char a1[] = {static_cast<char>(argc), 2, 3, 4};
char a2[] = {1, static_cast<char>(2*argc), 3, 4};
int res = memcmp(a1, a2, 4 + argc); // BOOM
// CHECK: AddressSanitizer: stack-buffer-overflow
// CHECK: {{#0.*memcmp}}
// CHECK: {{#1.*main}}
return res;
}