50 lines
1.2 KiB
C++
50 lines
1.2 KiB
C++
// Test __sanitizer_coverage_pc_buffer().
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// RUN: %clangxx_asan -fsanitize-coverage=edge %stdcxx11 %s -O3 -o %t && %run %t
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// UNSUPPORTED: android
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#include <assert.h>
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#include <memory>
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#include <sanitizer/coverage_interface.h>
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#include <stdint.h>
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#include <stdio.h>
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static volatile int sink;
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__attribute__((noinline)) void foo() { sink = 1; }
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void assertNotZeroPcs(uintptr_t *buf, uintptr_t size) {
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assert(buf);
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for (uintptr_t i = 0; i < size; ++i)
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assert(buf[i]);
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}
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int main() {
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uintptr_t buf_size = 1 << 20;
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std::unique_ptr<uintptr_t[]> buf(new uintptr_t[buf_size]);
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__sanitizer_set_coverage_pc_buffer(buf.get(), buf_size);
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{
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uintptr_t sz = __sanitizer_get_coverage_pc_buffer_pos();
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assertNotZeroPcs(buf.get(), sz);
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assert(sz);
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}
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{
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uintptr_t sz = __sanitizer_get_coverage_pc_buffer_pos();
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foo();
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uintptr_t sz1 = __sanitizer_get_coverage_pc_buffer_pos();
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assertNotZeroPcs(buf.get(), sz1);
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assert(sz1 > sz);
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}
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{
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uintptr_t sz = __sanitizer_get_coverage_pc_buffer_pos();
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// reset coverage to 0.
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__sanitizer_reset_coverage();
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uintptr_t sz1 = __sanitizer_get_coverage_pc_buffer_pos();
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assertNotZeroPcs(buf.get(), sz1);
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assert(sz1 < sz);
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}
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}
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