forked from OSchip/llvm-project
24 lines
860 B
C
24 lines
860 B
C
// RUN: %clang_dfsan -gmlt -mllvm -dfsan-track-origins=1 -mllvm -dfsan-fast-16-labels=true %s -o %t && \
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// RUN: %run %t >%t.out 2>&1
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// RUN: FileCheck %s --check-prefix=CHECK < %t.out
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//
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// REQUIRES: x86_64-target-arch
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//
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// Test origin tracking can lost origins at 2-byte load with addr % 4 == 3.
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#include <sanitizer/dfsan_interface.h>
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__attribute__((noinline)) uint16_t foo(uint16_t a, uint16_t b) { return a + b; }
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int main(int argc, char *argv[]) {
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uint64_t a __attribute__((aligned(4))) = 1;
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uint32_t b = 10;
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dfsan_set_label(4, (uint8_t *)&a + 4, sizeof(uint8_t));
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uint16_t c = foo(*(uint16_t *)((uint8_t *)&a + 3), b);
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dfsan_print_origin_trace(&c, "foo");
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}
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// CHECK: Taint value 0x4 {{.*}} origin tracking (foo)
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// CHECK: Origin value: {{.*}}, Taint value was created at
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// CHECK: #0 {{.*}} in main {{.*}}origin_ld_lost.c:[[@LINE-6]]
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