1 // RUN: %clang_esan_wset -O0 %s -o %t 2>&1 2 // RUN: %run %t 2>&1 | FileCheck %s 3 4 #include <stdlib.h> 5 #include <string.h> 6 #include <sys/mman.h> 7 #include <assert.h> 8 9 const int size = 0x1 << 25; // 523288 cache lines 10 const int line_size = 64; 11 12 int main(int argc, char **argv) { 13 char *bufA = (char *)malloc(sizeof(char) * line_size); 14 char bufB[64]; 15 char *bufC = (char *)mmap(0, size, PROT_READ | PROT_WRITE, 16 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); 17 bufA[0] = 0; 18 // This additional access to the same line should not increase the line 19 // count: but it's difficult to make a non-flaky test that measures the 20 // lines down to the ones digit so right now we're not really testing that. 21 // If we add a heap-only mode we may be able to be more precise. 22 bufA[1] = 0; 23 bufB[33] = 1; 24 for (int i = 0; i < size; i += line_size) 25 bufC[i] = 0; 26 free(bufA); 27 munmap(bufC, 0x4000); 28 // CHECK: {{.*}} EfficiencySanitizer: the total working set size: 32 MB (524{{[0-9][0-9][0-9]}} cache lines) 29 return 0; 30 } 31
