llvm-project

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// RUN: %clang_dfsan -gmlt -DOFFSET=0 -mllvm -dfsan-track-origins=1 %s -o %t && \
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// RUN:     %run %t >%t.out 2>&1
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// RUN: FileCheck %s --check-prefix=CHECK0 < %t.out
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// 
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// RUN: %clang_dfsan -gmlt -DOFFSET=10 -mllvm -dfsan-track-origins=1 %s -o %t && \
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// RUN:     %run %t >%t.out 2>&1
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// RUN: FileCheck %s --check-prefix=CHECK10 < %t.out
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#include <sanitizer/dfsan_interface.h>
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#include <string.h>
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int xx[10000];
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int yy[10000];
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volatile int idx = 30;
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__attribute__((noinline))
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void fn_g(int a, int b) {
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  xx[idx] = a; xx[idx + 10] = b;
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}
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__attribute__((noinline))
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void fn_f(int a, int b) {
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  fn_g(a, b);
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}
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__attribute__((noinline))
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void fn_h() {
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  memcpy(&yy, &xx, sizeof(xx));
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}
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int main(int argc, char *argv[]) {
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  int volatile z1 = 0;
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  int volatile z2 = 0;
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  dfsan_set_label(8, (void *)&z1, sizeof(z1));
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  dfsan_set_label(16, (void *)&z2, sizeof(z2));
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  fn_f(z1, z2);
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  fn_h();
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  dfsan_print_origin_trace(&yy[idx + OFFSET], NULL);
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  return 0;
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}
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// CHECK0: Taint value 0x8 {{.*}} origin tracking ()
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// CHECK0: Origin value: {{.*}}, Taint value was stored to memory at
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// CHECK0: #0 {{.*}} in fn_h.dfsan {{.*}}origin_memcpy.c:[[@LINE-16]]
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// CHECK0: #1 {{.*}} in main {{.*}}origin_memcpy.c:[[@LINE-8]]
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// CHECK0: Origin value: {{.*}}, Taint value was stored to memory at
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// CHECK0: #0 {{.*}} in fn_g.dfsan {{.*}}origin_memcpy.c:[[@LINE-30]]
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// CHECK0: #1 {{.*}} in fn_f.dfsan {{.*}}origin_memcpy.c:[[@LINE-26]]
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// CHECK0: #2 {{.*}} in main {{.*}}origin_memcpy.c:[[@LINE-14]]
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// CHECK0: Origin value: {{.*}}, Taint value was created at
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// CHECK0: #0 {{.*}} in main {{.*}}origin_memcpy.c:[[@LINE-19]]
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// CHECK10: Taint value 0x10 {{.*}} origin tracking ()
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// CHECK10: Origin value: {{.*}}, Taint value was stored to memory at
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// CHECK10: #0 {{.*}} in fn_h.dfsan {{.*}}origin_memcpy.c:[[@LINE-29]]
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// CHECK10: #1 {{.*}} in main {{.*}}origin_memcpy.c:[[@LINE-21]]
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// CHECK10: Origin value: {{.*}}, Taint value was stored to memory at
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// CHECK10: #0 {{.*}} in fn_g.dfsan {{.*}}origin_memcpy.c:[[@LINE-43]]
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// CHECK10: #1 {{.*}} in fn_f.dfsan {{.*}}origin_memcpy.c:[[@LINE-39]]
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// CHECK10: #2 {{.*}} in main {{.*}}origin_memcpy.c:[[@LINE-27]]
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// CHECK10: Origin value: {{.*}}, Taint value was created at
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// CHECK10: #0 {{.*}} in main {{.*}}origin_memcpy.c:[[@LINE-31]]
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