3c80f4d941
Summary: With the change, one can choose not to report comparison (or subtraction) of a pointer with nullptr pointer. Reviewers: kcc, jakubjelinek, alekseyshl Reviewed By: alekseyshl Subscribers: kubamracek Differential Revision: https://reviews.llvm.org/D41479 llvm-svn: 323995
49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
// 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:halt_on_error=0 %run %t 2>&1 | FileCheck %s
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#include <assert.h>
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#include <stdlib.h>
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int foo(char *p, char *q) {
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return p - q;
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}
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char global1[100] = {}, global2[100] = {};
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int main() {
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// Heap allocated memory.
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char *heap1 = (char *)malloc(42);
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char *heap2 = (char *)malloc(42);
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// CHECK: ERROR: AddressSanitizer: invalid-pointer-pair
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// CHECK: #{{[0-9]+ .*}} in main {{.*}}invalid-pointer-pairs-subtract-errors.cc:[[@LINE+1]]
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foo(heap1, heap2);
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// Global variables.
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// CHECK: ERROR: AddressSanitizer: invalid-pointer-pair
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// CHECK: #{{[0-9]+ .*}} in main {{.*}}invalid-pointer-pairs-subtract-errors.cc:[[@LINE+1]]
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foo(&global1[0], &global2[10]);
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// Stack variables.
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char stack1, stack2;
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// CHECK: ERROR: AddressSanitizer: invalid-pointer-pair
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// CHECK: #{{[0-9]+ .*}} in main {{.*}}invalid-pointer-pairs-subtract-errors.cc:[[@LINE+1]]
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foo(&stack1, &stack2);
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// Mixtures.
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// CHECK: ERROR: AddressSanitizer: invalid-pointer-pair
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// CHECK: #{{[0-9]+ .*}} in main {{.*}}invalid-pointer-pairs-subtract-errors.cc:[[@LINE+1]]
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foo(heap1, &stack1);
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// CHECK: ERROR: AddressSanitizer: invalid-pointer-pair
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// CHECK: #{{[0-9]+ .*}} in main {{.*}}invalid-pointer-pairs-subtract-errors.cc:[[@LINE+1]]
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foo(heap1, &global1[0]);
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// CHECK: ERROR: AddressSanitizer: invalid-pointer-pair
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// CHECK: #{{[0-9]+ .*}} in main {{.*}}invalid-pointer-pairs-subtract-errors.cc:[[@LINE+1]]
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foo(&stack1, &global1[0]);
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free(heap1);
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free(heap2);
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return 0;
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}
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