| 1 | // RUN: %clang_dfsan -gmlt -mllvm -dfsan-track-origins=1 %s -o %t && \ |
|---|
| 2 | // RUN: %run %t >%t.out 2>&1 |
|---|
| 3 | // RUN: FileCheck %s < %t.out |
|---|
| 4 | // |
|---|
| 5 | // Test origin tracking can lost origins at 2-byte load with addr % 4 == 3. |
|---|
| 6 | |
|---|
| 7 | #include <sanitizer/dfsan_interface.h> |
|---|
| 8 | |
|---|
| 9 | __attribute__((noinline)) uint16_t foo(uint16_t a, uint16_t b) { return a + b; } |
|---|
| 10 | |
|---|
| 11 | int main(int argc, char *argv[]) { |
|---|
| 12 | uint64_t a __attribute__((aligned(4))) = 1; |
|---|
| 13 | uint32_t b = 10; |
|---|
| 14 | dfsan_set_label(label: 4, addr: (uint8_t *)&a + 4, size: sizeof(uint8_t)); |
|---|
| 15 | uint16_t c = foo(a: *(uint16_t *)((uint8_t *)&a + 3), b); |
|---|
| 16 | dfsan_print_origin_trace(addr: &c, description: "foo" ); |
|---|
| 17 | } |
|---|
| 18 | |
|---|
| 19 | // CHECK: Taint value 0x4 {{.*}} origin tracking (foo) |
|---|
| 20 | // CHECK: Origin value: {{.*}}, Taint value was created at |
|---|
| 21 | // CHECK: #0 {{.*}} in main {{.*}}origin_ld_lost.c:[[@LINE-6]] |
|---|
| 22 | |
|---|
