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 foo(uint16_t a,uint16_t b)9__attribute__((noinline)) uint16_t foo(uint16_t a, uint16_t b) { return a + b; } 10 main(int argc,char * argv[])11int main(int argc, char *argv[]) { 12 uint64_t a __attribute__((aligned(4))) = 1; 13 uint32_t b = 10; 14 dfsan_set_label(4, (uint8_t *)&a + 4, sizeof(uint8_t)); 15 uint16_t c = foo(*(uint16_t *)((uint8_t *)&a + 3), b); 16 dfsan_print_origin_trace(&c, "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