| 1 | // Test strict_string_checks option in strncat function |
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| 2 | // RUN: %clang_asan %s -o %t |
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| 3 | // RUN: not %run %t test1 2>&1 | FileCheck %s --check-prefix=CHECK1-NONSTRICT --check-prefix=CHECK1 |
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| 4 | // 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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| 5 | // 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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| 6 | // RUN: not %run %t test2 2>&1 | FileCheck %s --check-prefix=CHECK2-NONSTRICT --check-prefix=CHECK2 |
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| 7 | // 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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| 8 | // 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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| 9 | |
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| 10 | #include <assert.h> |
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| 11 | #include <stdlib.h> |
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| 12 | #include <string.h> |
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| 13 | |
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| 14 | void test1(char *to, int to_size, char *from) { |
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| 15 | // One of arguments points to not allocated memory. |
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| 16 | char* r = strncat(dest: to + to_size, src: from, n: 2); |
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| 17 | } |
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| 18 | |
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| 19 | void test2(char *to, int to_size, char *from) { |
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| 20 | // "to" is not zero-terminated. |
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| 21 | memset(s: to, c: 'z', n: to_size); |
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| 22 | char* r = strncat(dest: to, src: from, n: 1); |
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| 23 | } |
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| 24 | |
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| 25 | int main(int argc, char **argv) { |
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| 26 | size_t to_size = 100; |
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| 27 | char *to = (char*)malloc(size: to_size); |
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| 28 | size_t from_size = 20; |
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| 29 | char *from = (char*)malloc(size: from_size); |
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| 30 | memset(s: from, c: 'z', n: from_size); |
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| 31 | from[from_size - 1] = '\0'; |
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| 32 | if (argc != 2) return 1; |
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| 33 | if (!strcmp(s1: argv[1], s2: "test1" )) test1(to, to_size, from); |
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| 34 | // CHECK1: {{.*ERROR: AddressSanitizer: heap-buffer-overflow on address}} |
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| 35 | // CHECK1-STRICT: READ of size 1 |
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| 36 | // CHECK1-NONSTRICT: WRITE of size 3 |
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| 37 | if (!strcmp(s1: argv[1], s2: "test2" )) test2(to, to_size, from); |
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| 38 | // CHECK2: {{.*ERROR: AddressSanitizer: heap-buffer-overflow on address}} |
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| 39 | // CHECK2-STRICT: READ of size 101 |
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| 40 | // CHECK2-NONSTRICT: WRITE of size 2 |
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| 41 | free(ptr: to); |
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| 42 | free(ptr: from); |
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| 43 | return 0; |
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| 44 | } |
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| 45 | |
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