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1// RUN: %clang_dfsan -gmlt -mllvm -dfsan-track-origins=1 %s -o %t && \2// RUN: %run %t >%t.out 2>&13// RUN: FileCheck %s < %t.out4//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 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 at21// CHECK: #0 {{.*}} in main {{.*}}origin_ld_lost.c:[[@LINE-6]]22