int main(void) { int i = 1; dfsan_label i_label = dfsan_create_label("i", 0); dfsan_set_label(i_label, &i, sizeof(i)); int j = 2; dfsan_label j_label = dfsan_create_label("j", 0); dfsan_set_label(j_label, &j, sizeof(j)); int k = 3; dfsan_label k_label = dfsan_create_label("k", 0); dfsan_set_label(k_label, &k, sizeof(k)); dfsan_label ij_label = dfsan_get_label(i + j); assert(dfsan_has_label(ij_label, i_label)); assert(dfsan_has_label(ij_label, j_label)); assert(!dfsan_has_label(ij_label, k_label)); dfsan_label ijk_label = dfsan_get_label(i + j + k); assert(dfsan_has_label(ijk_label, i_label)); assert(dfsan_has_label(ijk_label, j_label)); assert(dfsan_has_label(ijk_label, k_label)); return 0; }
void dfrtl_add_input_label(void* addr, size_t size) { if (globalInputLabel == 0) { printf("WindowRtl: Created global input label\n"); globalInputLabel = dfsan_create_label("input", 0); } dfsan_set_label(globalInputLabel, addr, size); printf("WindowRtl: Tainted %p size %zd\n", addr, size); }
int main(void) { int i = 1; dfsan_label i_label = dfsan_create_label("i", 0); dfsan_set_label(i_label, &i, sizeof(i)); dfsan_label ij_label = dfsan_get_label(f(i)); assert(dfsan_has_label(ij_label, i_label)); assert(dfsan_has_label_with_desc(ij_label, "j")); return 0; }
int main(void) { int i = 1; dfsan_label i_label = dfsan_create_label("i", 0); dfsan_set_label(i_label, &i, sizeof(i)); // CHECK: WARNING: DataFlowSanitizer: call to uninstrumented function f // CHECK-NOT: WARNING: DataFlowSanitizer: saw nonzero label // CHECK-NONZERO: WARNING: DataFlowSanitizer: saw nonzero label f(i); return 0; }
int f(int x) { int j = 2; dfsan_label j_label = dfsan_create_label("j", 0); dfsan_set_label(j_label, &j, sizeof(j)); return x + j; }