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// RUN: %clang_esan_wset -O0 %s -o %t 2>&1
// RUN: %run %t 2>&1 | FileCheck %s
// FIXME: Re-enable once PR33590 is fixed.
// UNSUPPORTED: x86_64
// Stucks at init and no clone feature equivalent.
// UNSUPPORTED: freebsd
#include <sanitizer/esan_interface.h>
#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);
// To avoid flakiness stemming from whether the sideline thread
// is scheduled enough on a loaded test machine, we coordinate
// with esan itself:
if (__esan_get_sample_count) {
while (__esan_get_sample_count() < 4) {
for (int i = 0; i < size; ++i)
buf[i] = i;
sched_yield();
}
}
munmap(buf, size);
// We only check for a few samples here to reduce the chance of flakiness.
// CHECK: =={{[0-9]+}}== Total number of samples: {{[0-9]+}}
// CHECK-NEXT: =={{[0-9]+}}== Samples array #0 at period 20 ms
// CHECK-NEXT: =={{[0-9]+}}==# 0: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
// CHECK-NEXT: =={{[0-9]+}}==# 1: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
// CHECK-NEXT: =={{[0-9]+}}==# 2: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
// CHECK-NEXT: =={{[0-9]+}}==# 3: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
// CHECK: =={{[0-9]+}}== Samples array #1 at period 80 ms
// CHECK-NEXT: =={{[0-9]+}}==# 0: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
// CHECK: =={{[0-9]+}}== Samples array #2 at period 320 ms
// CHECK: =={{[0-9]+}}== Samples array #3 at period 1280 ms
// CHECK: =={{[0-9]+}}== Samples array #4 at period 5120 ms
// CHECK: =={{[0-9]+}}== Samples array #5 at period 20 sec
// CHECK: =={{[0-9]+}}== Samples array #6 at period 81 sec
// CHECK: =={{[0-9]+}}== Samples array #7 at period 327 sec
// CHECK: {{.*}} EfficiencySanitizer: the total working set size: 32 MB (5242{{[0-9][0-9]}} cache lines)
return 0;
}
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