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45 lines
1.9 KiB
45 lines
1.9 KiB
4 months ago
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// Test strict_string_checks option in strncat function
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// RUN: %clang_asan %s -o %t
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// RUN: not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1-NONSTRICT --check-prefix=CHECK1
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// RUN: %env_asan_opts=strict_string_checks=false not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1-NONSTRICT --check-prefix=CHECK1
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// RUN: %env_asan_opts=strict_string_checks=true not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1-STRICT --check-prefix=CHECK1
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// RUN: not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2-NONSTRICT --check-prefix=CHECK2
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// RUN: %env_asan_opts=strict_string_checks=false not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2-NONSTRICT --check-prefix=CHECK2
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// RUN: %env_asan_opts=strict_string_checks=true not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2-STRICT --check-prefix=CHECK2
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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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void test1(char *to, int to_size, char *from) {
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// One of arguments points to not allocated memory.
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char* r = strncat(to + to_size, from, 2);
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}
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void test2(char *to, int to_size, char *from) {
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// "to" is not zero-terminated.
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memset(to, 'z', to_size);
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char* r = strncat(to, from, 1);
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}
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int main(int argc, char **argv) {
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size_t to_size = 100;
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char *to = (char*)malloc(to_size);
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size_t from_size = 20;
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char *from = (char*)malloc(from_size);
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memset(from, 'z', from_size);
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from[from_size - 1] = '\0';
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if (argc != 2) return 1;
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if (!strcmp(argv[1], "test1")) test1(to, to_size, from);
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// CHECK1: {{.*ERROR: AddressSanitizer: heap-buffer-overflow on address}}
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// CHECK1-STRICT: READ of size 1
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// CHECK1-NONSTRICT: WRITE of size 3
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if (!strcmp(argv[1], "test2")) test2(to, to_size, from);
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// CHECK2: {{.*ERROR: AddressSanitizer: heap-buffer-overflow on address}}
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// CHECK2-STRICT: READ of size 101
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// CHECK2-NONSTRICT: WRITE of size 2
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free(to);
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free(from);
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return 0;
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}
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