forked from OSchip/llvm-project
27 lines
742 B
C
27 lines
742 B
C
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// Test strict_string_checks option in strncmp function
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// RUN: %clang_asan %s -o %t && %run %t 2>&1
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// RUN: %env_asan_opts=strict_string_checks=false %run %t 2>&1
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// RUN: %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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int main(int argc, char **argv) {
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size_t size = 100;
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char fill = 'o';
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char *s1 = (char*)malloc(size);
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memset(s1, fill, size);
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char *s2 = (char*)malloc(size);
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memset(s2, fill, size);
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s1[size - 1] = 'z';
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s2[size - 1] = 'x';
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int r = strncmp(s1, s2, size + 1);
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// CHECK: {{.*ERROR: AddressSanitizer: heap-buffer-overflow on address}}
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// CHECK: READ of size 101
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assert(r == 1);
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free(s1);
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free(s2);
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return 0;
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}
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