1 //===-- asan_benchmarks_test.cc ----------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file is a part of AddressSanitizer, an address sanity checker. 11 // 12 // Some benchmarks for the instrumented code. 13 //===----------------------------------------------------------------------===// 14 15 #include "asan_test_utils.h" 16 17 template<class T> 18 __attribute__((noinline)) 19 static void ManyAccessFunc(T *x, size_t n_elements, size_t n_iter) { 20 for (size_t iter = 0; iter < n_iter; iter++) { 21 break_optimization(0); 22 // hand unroll the loop to stress the reg alloc. 23 for (size_t i = 0; i <= n_elements - 16; i += 16) { 24 x[i + 0] = i; 25 x[i + 1] = i; 26 x[i + 2] = i; 27 x[i + 3] = i; 28 x[i + 4] = i; 29 x[i + 5] = i; 30 x[i + 6] = i; 31 x[i + 7] = i; 32 x[i + 8] = i; 33 x[i + 9] = i; 34 x[i + 10] = i; 35 x[i + 11] = i; 36 x[i + 12] = i; 37 x[i + 13] = i; 38 x[i + 14] = i; 39 x[i + 15] = i; 40 } 41 } 42 } 43 44 TEST(AddressSanitizer, ManyAccessBenchmark) { 45 size_t kLen = 1024; 46 int *int_array = new int[kLen]; 47 ManyAccessFunc(int_array, kLen, 1 << 24); 48 delete [] int_array; 49 } 50 51 // access 7 char elements in a 7 byte array (i.e. on the border). 52 __attribute__((noinline)) 53 static void BorderAccessFunc(char *x, size_t n_iter) { 54 for (size_t iter = 0; iter < n_iter; iter++) { 55 break_optimization(x); 56 x[0] = 0; 57 x[1] = 0; 58 x[2] = 0; 59 x[3] = 0; 60 x[4] = 0; 61 x[5] = 0; 62 x[6] = 0; 63 } 64 } 65 66 TEST(AddressSanitizer, BorderAccessBenchmark) { 67 char *char_7_array = new char[7]; 68 BorderAccessFunc(char_7_array, 1 << 30); 69 delete [] char_7_array; 70 } 71 72 static void FunctionWithLargeStack() { 73 int stack[1000]; 74 Ident(stack); 75 } 76 77 TEST(AddressSanitizer, FakeStackBenchmark) { 78 for (int i = 0; i < 10000000; i++) 79 Ident(&FunctionWithLargeStack)(); 80 } 81 82 int main(int argc, char **argv) { 83 testing::InitGoogleTest(&argc, argv); 84 return RUN_ALL_TESTS(); 85 } 86
