compiler-rt/test/asan/TestCases/interception_failure_test.cpp

   1 // If user provides his own libc functions, ASan doesn't
   2 // intercept these functions.
   3
   4 // RUN: %clangxx_asan -O0 %s -o %t && %run %t 2>&1 | FileCheck %s
   5 // RUN: %clangxx_asan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
   6 // RUN: %clangxx_asan -O2 %s -o %t && %run %t 2>&1 | FileCheck %s
   7 // RUN: %clangxx_asan -O3 %s -o %t && %run %t 2>&1 | FileCheck %s
   8 // XFAIL: target={{.*freebsd.*}}
   9
  10 // On Windows, the static runtime build _will_ intercept static copies of libc
  11 // functions, making this test invalid.
  12 // In addition, defining strtol in a static build used to result in linker
  13 // errors with libucrt.lib, but this stopped happening somewhere between WinSDK
  14 // 10.0.19041.0 and 10.0.22621.0 due to some changes in its implementation.
  15 // UNSUPPORTED: win32-static-asan
  16
  17 // On NetBSD, defining strtol in a static build results in linker errors, but
  18 // it works with the dynamic runtime.
  19 // XFAIL: target={{.*netbsd.*}} && !asan-dynamic-runtime
  20
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24
  25 extern "C" long strtol(const char *nptr, char **endptr, int base) {
  26   fprintf(stderr, "my_strtol_interceptor\n");
  27   if (endptr)
  28     *endptr = (char*)nptr + strlen(nptr);
  29   return 0;
  30 }
  31
  32 int main() {
  33   char *x = (char*)malloc(10 * sizeof(char));
  34   free(x);
  35   return (int)strtol(x, 0, 10);
  36   // CHECK: my_strtol_interceptor
  37   // CHECK-NOT: heap-use-after-free
  38 }