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