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75 lines
1.4 KiB
75 lines
1.4 KiB
4 months ago
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// RUN: %clangxx_asan -O0 %s -o %t -mllvm -asan-detect-invalid-pointer-pair
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// RUN: %env_asan_opts=detect_invalid_pointer_pairs=2 %run %t
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#include <assert.h>
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#include <stdlib.h>
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int foo(char *p) {
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char *p2 = p + 20;
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return p > p2;
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}
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int bar(char *p, char *q) {
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return p <= q;
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}
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int baz(char *p, char *q) {
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return p != 0 && p < q;
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}
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char global[8192] = {};
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char small_global[7] = {};
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int main() {
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// Heap allocated memory.
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char *p = (char *)malloc(42);
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int r = foo(p);
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free(p);
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p = (char *)malloc(1024);
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bar(p, p + 1024);
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bar(p + 1024, p + 1023);
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bar(p + 1, p + 1023);
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free(p);
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p = (char *)malloc(4096);
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bar(p, p + 4096);
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bar(p + 10, p + 100);
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bar(p + 1024, p + 4096);
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bar(p + 4095, p + 4096);
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bar(p + 4095, p + 4094);
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bar(p + 100, p + 4096);
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bar(p + 100, p + 4094);
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free(p);
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// Global variable.
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bar(&global[0], &global[1]);
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bar(&global[1], &global[2]);
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bar(&global[2], &global[1]);
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bar(&global[0], &global[100]);
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bar(&global[1000], &global[7000]);
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bar(&global[500], &global[10]);
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p = &global[0];
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bar(p, p + 8192);
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p = &global[8000];
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bar(p, p + 192);
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p = &small_global[0];
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bar(p, p + 1);
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bar(p, p + 7);
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bar(p + 7, p + 1);
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bar(p + 6, p + 7);
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bar(p + 7, p + 7);
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// Stack variable.
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char stack[10000];
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bar(&stack[0], &stack[100]);
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bar(&stack[1000], &stack[9000]);
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bar(&stack[500], &stack[10]);
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baz(0, &stack[10]);
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return 0;
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}
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