diff options
Diffstat (limited to 'lib/asan/tests/asan_benchmarks_test.cc')
-rw-r--r-- | lib/asan/tests/asan_benchmarks_test.cc | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/lib/asan/tests/asan_benchmarks_test.cc b/lib/asan/tests/asan_benchmarks_test.cc new file mode 100644 index 000000000000..b72cc3fbe14b --- /dev/null +++ b/lib/asan/tests/asan_benchmarks_test.cc @@ -0,0 +1,86 @@ +//===-- asan_benchmarks_test.cc ------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of AddressSanitizer, an address sanity checker. +// +// Some benchmarks for the instrumented code. +//===----------------------------------------------------------------------===// + +#include "asan_test_config.h" +#include "asan_test_utils.h" + +template<class T> +__attribute__((noinline)) +static void ManyAccessFunc(T *x, size_t n_elements, size_t n_iter) { + for (size_t iter = 0; iter < n_iter; iter++) { + break_optimization(0); + // hand unroll the loop to stress the reg alloc. + for (size_t i = 0; i <= n_elements - 16; i += 16) { + x[i + 0] = i; + x[i + 1] = i; + x[i + 2] = i; + x[i + 3] = i; + x[i + 4] = i; + x[i + 5] = i; + x[i + 6] = i; + x[i + 7] = i; + x[i + 8] = i; + x[i + 9] = i; + x[i + 10] = i; + x[i + 11] = i; + x[i + 12] = i; + x[i + 13] = i; + x[i + 14] = i; + x[i + 15] = i; + } + } +} + +TEST(AddressSanitizer, ManyAccessBenchmark) { + size_t kLen = 1024; + int *int_array = new int[kLen]; + ManyAccessFunc(int_array, kLen, 1 << 24); + delete [] int_array; +} + +// access 7 char elements in a 7 byte array (i.e. on the border). +__attribute__((noinline)) +static void BorderAccessFunc(char *x, size_t n_iter) { + for (size_t iter = 0; iter < n_iter; iter++) { + break_optimization(x); + x[0] = 0; + x[1] = 0; + x[2] = 0; + x[3] = 0; + x[4] = 0; + x[5] = 0; + x[6] = 0; + } +} + +TEST(AddressSanitizer, BorderAccessBenchmark) { + char *char_7_array = new char[7]; + BorderAccessFunc(char_7_array, 1 << 30); + delete [] char_7_array; +} + +static void FunctionWithLargeStack() { + int stack[1000]; + Ident(stack); +} + +TEST(AddressSanitizer, FakeStackBenchmark) { + for (int i = 0; i < 10000000; i++) + Ident(&FunctionWithLargeStack)(); +} + +int main(int argc, char **argv) { + testing::InitGoogleTest(&argc, argv); + return RUN_ALL_TESTS(); +} |