src/compiler-rt/test/esan/TestCases/workingset-memset.cpp

   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 #include <string.h>
   9
  10 int main(int argc, char **argv) {
  11   const int size = 128*1024*1024;
  12   char *p = (char *)mmap(0, size, PROT_READ | PROT_WRITE,
  13                          MAP_ANON | MAP_PRIVATE, -1, 0);
  14   // Test the slowpath at different cache line boundaries.
  15   for (int i = 0; i < 630; i++)
  16     memset((char *)p + 63*i, i, 63*i);
  17   munmap(p, size);
  18   return 0;
  19   // CHECK: {{.*}} EfficiencySanitizer: the total working set size: 77 KB (12{{[0-9]+}} cache lines)
  20 }