forked from OSchip/llvm-project
85 lines
2.1 KiB
C++
85 lines
2.1 KiB
C++
//===-- asan_benchmarks_test.cc ----------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of AddressSanitizer, an address sanity checker.
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//
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// Some benchmarks for the instrumented code.
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//===----------------------------------------------------------------------===//
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#include "asan_test_utils.h"
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template<class T>
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__attribute__((noinline))
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static void ManyAccessFunc(T *x, size_t n_elements, size_t n_iter) {
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for (size_t iter = 0; iter < n_iter; iter++) {
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break_optimization(0);
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// hand unroll the loop to stress the reg alloc.
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for (size_t i = 0; i <= n_elements - 16; i += 16) {
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x[i + 0] = i;
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x[i + 1] = i;
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x[i + 2] = i;
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x[i + 3] = i;
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x[i + 4] = i;
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x[i + 5] = i;
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x[i + 6] = i;
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x[i + 7] = i;
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x[i + 8] = i;
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x[i + 9] = i;
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x[i + 10] = i;
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x[i + 11] = i;
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x[i + 12] = i;
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x[i + 13] = i;
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x[i + 14] = i;
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x[i + 15] = i;
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}
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}
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}
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TEST(AddressSanitizer, ManyAccessBenchmark) {
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size_t kLen = 1024;
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int *int_array = new int[kLen];
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ManyAccessFunc(int_array, kLen, 1 << 24);
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delete [] int_array;
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}
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// access 7 char elements in a 7 byte array (i.e. on the border).
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__attribute__((noinline))
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static void BorderAccessFunc(char *x, size_t n_iter) {
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for (size_t iter = 0; iter < n_iter; iter++) {
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break_optimization(x);
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x[0] = 0;
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x[1] = 0;
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x[2] = 0;
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x[3] = 0;
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x[4] = 0;
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x[5] = 0;
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x[6] = 0;
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}
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}
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TEST(AddressSanitizer, BorderAccessBenchmark) {
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char *char_7_array = new char[7];
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BorderAccessFunc(char_7_array, 1 << 30);
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delete [] char_7_array;
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}
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static void FunctionWithLargeStack() {
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int stack[1000];
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Ident(stack);
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}
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TEST(AddressSanitizer, FakeStackBenchmark) {
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for (int i = 0; i < 10000000; i++)
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Ident(&FunctionWithLargeStack)();
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}
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int main(int argc, char **argv) {
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testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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