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_config.h" 16 #include "asan_test_utils.h" 17 18 template<class T> 19 __attribute__((noinline)) 20 static void ManyAccessFunc(T *x, size_t n_elements, size_t n_iter) { 21 for (size_t iter = 0; iter < n_iter; iter++) { 22 break_optimization(0); 23 // hand unroll the loop to stress the reg alloc. 24 for (size_t i = 0; i <= n_elements - 16; i += 16) { 25 x[i + 0] = i; 26 x[i + 1] = i; 27 x[i + 2] = i; 28 x[i + 3] = i; 29 x[i + 4] = i; 30 x[i + 5] = i; 31 x[i + 6] = i; 32 x[i + 7] = i; 33 x[i + 8] = i; 34 x[i + 9] = i; 35 x[i + 10] = i; 36 x[i + 11] = i; 37 x[i + 12] = i; 38 x[i + 13] = i; 39 x[i + 14] = i; 40 x[i + 15] = i; 41 } 42 } 43 } 44 45 TEST(AddressSanitizer, ManyAccessBenchmark) { 46 size_t kLen = 1024; 47 int *int_array = new int[kLen]; 48 ManyAccessFunc(int_array, kLen, 1 << 24); 49 delete [] int_array; 50 } 51 52 // access 7 char elements in a 7 byte array (i.e. on the border). 53 __attribute__((noinline)) 54 static void BorderAccessFunc(char *x, size_t n_iter) { 55 for (size_t iter = 0; iter < n_iter; iter++) { 56 break_optimization(x); 57 x[0] = 0; 58 x[1] = 0; 59 x[2] = 0; 60 x[3] = 0; 61 x[4] = 0; 62 x[5] = 0; 63 x[6] = 0; 64 } 65 } 66 67 TEST(AddressSanitizer, BorderAccessBenchmark) { 68 char *char_7_array = new char[7]; 69 BorderAccessFunc(char_7_array, 1 << 30); 70 delete [] char_7_array; 71 } 72 73 static void FunctionWithLargeStack() { 74 int stack[1000]; 75 Ident(stack); 76 } 77 78 TEST(AddressSanitizer, FakeStackBenchmark) { 79 for (int i = 0; i < 10000000; i++) 80 Ident(&FunctionWithLargeStack)(); 81 } 82 83 int main(int argc, char **argv) { 84 testing::InitGoogleTest(&argc, argv); 85 return RUN_ALL_TESTS(); 86 } 87
