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// Test strict_string_checks option in strncmp function
// RUN: %clang_asan %s -o %t
// RUN: %env_asan_opts=strict_string_checks=false %run %t a 2>&1
// RUN: %env_asan_opts=strict_string_checks=true %run %t a 2>&1
// RUN: not %run %t b 2>&1 | FileCheck %s
// RUN: not %run %t c 2>&1 | FileCheck %s
// RUN: not %run %t d 2>&1 | FileCheck %s
// RUN: not %run %t e 2>&1 | FileCheck %s
// RUN: not %run %t f 2>&1 | FileCheck %s
// RUN: not %run %t g 2>&1 | FileCheck %s
// RUN: %env_asan_opts=strict_string_checks=false %run %t h 2>&1
// RUN: %env_asan_opts=strict_string_checks=true not %run %t h 2>&1 | FileCheck %s
// RUN: %env_asan_opts=strict_string_checks=false %run %t i 2>&1
// RUN: %env_asan_opts=strict_string_checks=true not %run %t i 2>&1 | FileCheck %s
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main(int argc, char **argv) {
assert(argc >= 2);
enum { size = 100 };
char fill = 'o';
char s1[size];
char s2[size];
memset(s1, fill, size);
memset(s2, fill, size);
switch (argv[1][0]) {
case 'a':
s1[size - 1] = 'z';
s2[size - 1] = 'x';
for (int i = 0; i <= size; ++i)
assert((strncmp(s1, s2, i) == 0) == (i < size));
s1[size - 1] = '\0';
s2[size - 1] = '\0';
assert(strncmp(s1, s2, 2*size) == 0);
break;
case 'b':
return strncmp(s1-1, s2, 1);
case 'c':
return strncmp(s1, s2-1, 1);
case 'd':
return strncmp(s1+size, s2, 1);
case 'e':
return strncmp(s1, s2+size, 1);
case 'f':
return strncmp(s1+1, s2, size);
case 'g':
return strncmp(s1, s2+1, size);
case 'h':
s1[size - 1] = '\0';
assert(strncmp(s1, s2, 2*size) != 0);
break;
case 'i':
s2[size - 1] = '\0';
assert(strncmp(s1, s2, 2*size) != 0);
break;
// CHECK: {{.*}}ERROR: AddressSanitizer: stack-buffer-{{ov|und}}erflow on address
}
return 0;
}
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