66 lines · c
1// Test strict_string_checks option in strncmp function2// RUN: %clang_asan %s -o %t3 4// RUN: %env_asan_opts=strict_string_checks=false %run %t a 2>&15// RUN: %env_asan_opts=strict_string_checks=true %run %t a 2>&16// RUN: not %run %t b 2>&1 | FileCheck %s7// RUN: not %run %t c 2>&1 | FileCheck %s8// RUN: not %run %t d 2>&1 | FileCheck %s9// RUN: not %run %t e 2>&1 | FileCheck %s10// RUN: not %run %t f 2>&1 | FileCheck %s11// RUN: not %run %t g 2>&1 | FileCheck %s12// RUN: %env_asan_opts=strict_string_checks=false %run %t h 2>&113// RUN: %env_asan_opts=strict_string_checks=true not %run %t h 2>&1 | FileCheck %s14// RUN: %env_asan_opts=strict_string_checks=false %run %t i 2>&115// RUN: %env_asan_opts=strict_string_checks=true not %run %t i 2>&1 | FileCheck %s16 17#include <assert.h>18#include <stdlib.h>19#include <stdio.h>20#include <string.h>21#include <ctype.h>22 23int main(int argc, char **argv) {24 assert(argc >= 2);25 enum { size = 100 };26 char fill = 'o';27 char s1[size];28 char s2[size];29 memset(s1, fill, size);30 memset(s2, fill, size);31 32 switch (argv[1][0]) {33 case 'a':34 s1[size - 1] = 'z';35 s2[size - 1] = 'x';36 for (int i = 0; i <= size; ++i)37 assert((strncmp(s1, s2, i) == 0) == (i < size));38 s1[size - 1] = '\0';39 s2[size - 1] = '\0';40 assert(strncmp(s1, s2, 2*size) == 0);41 break;42 case 'b':43 return strncmp(s1-1, s2, 1);44 case 'c':45 return strncmp(s1, s2-1, 1);46 case 'd':47 return strncmp(s1+size, s2, 1);48 case 'e':49 return strncmp(s1, s2+size, 1);50 case 'f':51 return strncmp(s1+1, s2, size);52 case 'g':53 return strncmp(s1, s2+1, size);54 case 'h':55 s1[size - 1] = '\0';56 assert(strncmp(s1, s2, 2*size) != 0);57 break;58 case 'i':59 s2[size - 1] = '\0';60 assert(strncmp(s1, s2, 2*size) != 0);61 break;62 // CHECK: {{.*}}ERROR: AddressSanitizer: stack-buffer-{{ov|und}}erflow on address63 }64 return 0;65}66