src/compiler-rt/test/asan/TestCases/strncasecmp_strict.c

   1 // Test strict_string_checks option in strncmp function
   2 // RUN: %clang_asan %s -o %t
   3
   4 // RUN: %env_asan_opts=strict_string_checks=false %run %t a 2>&1
   5 // RUN: %env_asan_opts=strict_string_checks=true %run %t a 2>&1
   6 // RUN: not %run %t b 2>&1 | FileCheck %s
   7 // RUN: not %run %t c 2>&1 | FileCheck %s
   8 // RUN: not %run %t d 2>&1 | FileCheck %s
   9 // RUN: not %run %t e 2>&1 | FileCheck %s
  10 // RUN: not %run %t f 2>&1 | FileCheck %s
  11 // RUN: not %run %t g 2>&1 | FileCheck %s
  12 // RUN: %env_asan_opts=strict_string_checks=false %run %t h 2>&1
  13 // RUN: %env_asan_opts=strict_string_checks=true not %run %t h 2>&1 | FileCheck %s
  14 // RUN: %env_asan_opts=strict_string_checks=false %run %t i 2>&1
  15 // RUN: %env_asan_opts=strict_string_checks=true not %run %t i 2>&1 | FileCheck %s
  16
  17 // XFAIL: win32
  18
  19 #include <assert.h>
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <ctype.h>
  24
  25 int main(int argc, char **argv) {
  26   assert(argc >= 2);
  27   const size_t size = 100;
  28   char fill = 'o';
  29   char s1[size];
  30   char s2[size];
  31   memset(s1, fill, size);
  32   memset(s2, fill, size);
  33
  34   switch (argv[1][0]) {
  35     case 'a':
  36       s1[size - 1] = 'z';
  37       s2[size - 1] = 'x';
  38       for (int i = 0; i <= size; ++i)
  39         assert((strncasecmp(s1, s2, i) == 0) == (i < size));
  40       s1[size - 1] = '\0';
  41       s2[size - 1] = '\0';
  42       assert(strncasecmp(s1, s2, 2*size) == 0);
  43       break;
  44     case 'b':
  45       return strncasecmp(s1-1, s2, 1);
  46     case 'c':
  47       return strncasecmp(s1, s2-1, 1);
  48     case 'd':
  49       return strncasecmp(s1+size, s2, 1);
  50     case 'e':
  51       return strncasecmp(s1, s2+size, 1);
  52     case 'f':
  53       return strncasecmp(s1+1, s2, size);
  54     case 'g':
  55       return strncasecmp(s1, s2+1, size);
  56     case 'h':
  57       s1[size - 1] = '\0';
  58       assert(strncasecmp(s1, s2, 2*size) != 0);
  59       break;
  60     case 'i':
  61       s2[size - 1] = '\0';
  62       assert(strncasecmp(s1, s2, 2*size) != 0);
  63       break;
  64     // CHECK: {{.*}}ERROR: AddressSanitizer: stack-buffer-{{ov|und}}erflow on address
  65   }
  66   return 0;
  67 }