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// RUN: %clang_esan_wset -O0 %s -o %t 2>&1
// RUN: %env_esan_opts=verbosity=1 %run %t 2>&1 | FileCheck %s
#include <sched.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
const int size = 0x1 << 25; // 523288 cache lines
int main(int argc, char **argv) {
char *buf = (char *)mmap(0, size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
// Try to increase the probability that the sideline thread is
// scheduled. Unfortunately we can't do proper synchronization
// without some form of annotation or something.
sched_yield();
// Do enough work to get at least 2 samples.
for (int i = 0; i < size; ++i)
buf[i] = i;
munmap(buf, size);
// CHECK: {{.*}}EfficiencySanitizer: snapshot {{.*}}
// CHECK-NEXT: {{.*}}EfficiencySanitizer: snapshot {{.*}}
// CHECK: {{.*}} EfficiencySanitizer: the total working set size: 32 MB (5242{{[0-9][0-9]}} cache lines)
return 0;
}
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