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70 lines
2.0 KiB
70 lines
2.0 KiB
// RUN: %clang_dfsan %s -o %t
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// RUN: DFSAN_OPTIONS=dump_labels_at_exit=/dev/stdout %run %t 2>&1 | FileCheck %s
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// RUN: DFSAN_OPTIONS=dump_labels_at_exit=/dev/stdout not %run %t c 2>&1 | FileCheck %s --check-prefix=CHECK-OOL
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// RUN: DFSAN_OPTIONS=dump_labels_at_exit=/dev/stdout not %run %t u 2>&1 | FileCheck %s --check-prefix=CHECK-OOL
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// Tests that labels are properly dumped at program termination.
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#include <sanitizer/dfsan_interface.h>
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#include <assert.h>
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#include <stdio.h>
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int main(int argc, char** argv) {
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int i = 1;
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dfsan_label i_label = dfsan_create_label("i", 0);
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dfsan_set_label(i_label, &i, sizeof(i));
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int j = 2;
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dfsan_label j_label = dfsan_create_label("j", 0);
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dfsan_set_label(j_label, &j, sizeof(j));
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int k = 3;
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dfsan_label k_label = dfsan_create_label("k", 0);
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dfsan_set_label(k_label, &k, sizeof(k));
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dfsan_label ij_label = dfsan_get_label(i + j);
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dfsan_label ijk_label = dfsan_get_label(i + j + k);
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fprintf(stderr, "i %d j %d k %d ij %d ijk %d\n", i_label, j_label, k_label,
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ij_label, ijk_label);
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// CHECK: 1 0 0 i
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// CHECK: 2 0 0 j
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// CHECK: 3 0 0 k
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// CHECK: 4 1 2
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// CHECK: 5 3 4
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if (argc > 1) {
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// Exhaust the labels.
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unsigned long num_labels = 1 << (sizeof(dfsan_label) * 8);
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for (unsigned long i = ijk_label + 1; i < num_labels - 2; ++i) {
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dfsan_label l = dfsan_create_label("l", 0);
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assert(l == i);
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}
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// Consume the last available label.
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dfsan_label l = dfsan_union(5, 6);
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assert(l == num_labels - 2);
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// Try to allocate another label (either explicitly or by unioning two
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// existing labels), but expect a crash.
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if (argv[1][0] == 'c') {
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l = dfsan_create_label("l", 0);
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} else {
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l = dfsan_union(6, 7);
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}
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// CHECK-OOL: FATAL: DataFlowSanitizer: out of labels
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// CHECK-OOL: 1 0 0 i
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// CHECK-OOL: 2 0 0 j
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// CHECK-OOL: 3 0 0 k
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// CHECK-OOL: 4 1 2
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// CHECK-OOL: 5 3 4
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// CHECK-OOL: 6 0 0
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// CHECK-OOL: 65534 5 6
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// CHECK-OOL: 65535 0 0 <init label>
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}
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return 0;
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}
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