File: dll_intercept_strlen.cpp

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llvm-toolchain-17 1%3A17.0.6-22
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// RUN: %clang_cl_asan %Od %p/dll_host.cpp %Fe%t
// RUN: %clang_cl_asan %LD %Od %s %Fe%t.dll
// RUN: not %run %t %t.dll 2>&1 | FileCheck %s

#include <stdio.h>
#include <string.h>

extern "C" __declspec(dllexport)
int test_function() {
  char str[] = "Hello!";
  if (6 != strlen(str))
    return 1;
  printf("Initial test OK\n");
  fflush(0);
// CHECK: Initial test OK

  str[6] = '!';  // Removes '\0' at the end!
  int len = strlen(str);
// CHECK: AddressSanitizer: stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
// FIXME: Should be READ of size 1, see issue 155.
// CHECK: READ of size {{[0-9]+}} at [[ADDR]] thread T0
// CHECK-NEXT: {{#0 .*}}strlen
// CHECK-NEXT: {{#1 .* test_function .*}}dll_intercept_strlen.cpp:[[@LINE-5]]
//
// CHECK: Address [[ADDR]] is located in stack of thread T0 at offset {{.*}} in frame
// CHECK-NEXT: test_function {{.*}}dll_intercept_strlen.cpp:
  return len > 42;
}