| 1 | // RUN: %clang_tysan -O0 %s -o %t && %run %t 10 >%t.out.0 2>&1 |
|---|
| 2 | // RUN: FileCheck %s < %t.out.0 |
|---|
| 3 | // RUN: %clang_tysan -O2 %s -o %t && %run %t 10 >%t.out 2>&1 |
|---|
| 4 | // RUN: FileCheck %s < %t.out |
|---|
| 5 | |
|---|
| 6 | #include <stdio.h> |
|---|
| 7 | #include <stdlib.h> |
|---|
| 8 | #include <string.h> |
|---|
| 9 | |
|---|
| 10 | void __attribute__((noinline)) add_flt(float *a) { |
|---|
| 11 | *a += 2.0f; |
|---|
| 12 | // CHECK: ERROR: TypeSanitizer: type-aliasing-violation |
|---|
| 13 | // CHECK: READ of size 4 at {{.*}} with type float accesses an existing object of type int |
|---|
| 14 | // CHECK: {{#0 0x.* in add_flt .*basic.c:}}[[@LINE-3]] |
|---|
| 15 | // CHECK: ERROR: TypeSanitizer: type-aliasing-violation |
|---|
| 16 | // CHECK: WRITE of size 4 at {{.*}} with type float accesses an existing object of type int |
|---|
| 17 | // CHECK: {{#0 0x.* in add_flt .*basic.c:}}[[@LINE-6]] |
|---|
| 18 | // CHECK: ERROR: TypeSanitizer: type-aliasing-violation |
|---|
| 19 | // CHECK: READ of size 4 at {{.*}} with type float accesses an existing object of type long |
|---|
| 20 | // CHECK: {{#0 0x.* in add_flt .*basic.c:}}[[@LINE-9]] |
|---|
| 21 | // CHECK: ERROR: TypeSanitizer: type-aliasing-violation |
|---|
| 22 | // CHECK: WRITE of size 4 at {{.*}} with type float accesses an existing object of type long |
|---|
| 23 | // CHECK: {{#0 0x.* in add_flt .*basic.c:}}[[@LINE-12]] |
|---|
| 24 | // CHECK: ERROR: TypeSanitizer: type-aliasing-violation |
|---|
| 25 | // CHECK: READ of size 4 at {{.*}} with type float accesses part of an existing object of type long that starts at offset -4 |
|---|
| 26 | // CHECK: {{#0 0x.* in add_flt .*basic.c:}}[[@LINE-15]] |
|---|
| 27 | // CHECK: ERROR: TypeSanitizer: type-aliasing-violation |
|---|
| 28 | // CHECK: WRITE of size 4 at {{.*}} with type float accesses part of an existing object of type long that starts at offset -4 |
|---|
| 29 | // CHECK: {{#0 0x.* in add_flt .*basic.c:}}[[@LINE-18]] |
|---|
| 30 | // CHECK: ERROR: TypeSanitizer: type-aliasing-violation |
|---|
| 31 | // CHECK: READ of size 4 at {{.*}} with type float partially accesses an object of type short that starts at offset 2 |
|---|
| 32 | // CHECK: {{#0 0x.* in add_flt .*basic.c:}}[[@LINE-21]] |
|---|
| 33 | } |
|---|
| 34 | |
|---|
| 35 | int main(int argc, char *argv[]) { |
|---|
| 36 | int x = atoi(nptr: argv[1]); |
|---|
| 37 | add_flt(a: (float *)&x); |
|---|
| 38 | printf(format: "x = %d\n" , x); |
|---|
| 39 | |
|---|
| 40 | long y = x; |
|---|
| 41 | add_flt(a: (float *)&y); |
|---|
| 42 | printf(format: "y = %ld\n" , y); |
|---|
| 43 | |
|---|
| 44 | add_flt(a: ((float *)&y) + 1); |
|---|
| 45 | printf(format: "y = %ld\n" , y); |
|---|
| 46 | |
|---|
| 47 | char *mem = (char *)malloc(size: 4 * sizeof(short)); |
|---|
| 48 | memset(s: mem, c: 0, n: 4 * sizeof(short)); |
|---|
| 49 | *(short *)(mem + 2) = x; |
|---|
| 50 | add_flt(a: (float *)mem); |
|---|
| 51 | short s1 = *(short *)mem; |
|---|
| 52 | // CHECK: ERROR: TypeSanitizer: type-aliasing-violation |
|---|
| 53 | // CHECK: READ of size 2 at {{.*}} with type short accesses an existing object of type float |
|---|
| 54 | // CHECK: {{#0 0x.* in main .*basic.c:}}[[@LINE-3]] |
|---|
| 55 | short s2 = *(short *)(mem + 2); |
|---|
| 56 | // CHECK: ERROR: TypeSanitizer: type-aliasing-violation |
|---|
| 57 | // CHECK: READ of size 2 at {{.*}} with type short accesses part of an existing object of type float that starts at offset -2 |
|---|
| 58 | // CHECK: {{#0 0x.* in main .*basic.c:}}[[@LINE-3]] |
|---|
| 59 | printf(format: "m[0] = %d, m[1] = %d\n" , s1, s2); |
|---|
| 60 | free(ptr: mem); |
|---|
| 61 | |
|---|
| 62 | return 0; |
|---|
| 63 | } |
|---|
| 64 | |
|---|
| 65 | // CHECK-NOT: ERROR: TypeSanitizer: type-aliasing-violation |
|---|
| 66 | |
|---|
