forked from OSchip/llvm-project
47 lines
2.0 KiB
C++
47 lines
2.0 KiB
C++
// RUN: %clang_esan_wset -O0 %s -o %t 2>&1
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// RUN: %run %t 2>&1 | FileCheck %s
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// FIXME: Re-enable once PR33590 is fixed.
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// UNSUPPORTED: x86_64
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#include <sanitizer/esan_interface.h>
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#include <sched.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mman.h>
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const int size = 0x1 << 25; // 523288 cache lines
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int main(int argc, char **argv) {
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char *buf = (char *)mmap(0, size, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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// To avoid flakiness stemming from whether the sideline thread
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// is scheduled enough on a loaded test machine, we coordinate
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// with esan itself:
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if (__esan_get_sample_count) {
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while (__esan_get_sample_count() < 4) {
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for (int i = 0; i < size; ++i)
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buf[i] = i;
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sched_yield();
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}
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}
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munmap(buf, size);
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// We only check for a few samples here to reduce the chance of flakiness.
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// CHECK: =={{[0-9]+}}== Total number of samples: {{[0-9]+}}
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// CHECK-NEXT: =={{[0-9]+}}== Samples array #0 at period 20 ms
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// CHECK-NEXT: =={{[0-9]+}}==# 0: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
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// CHECK-NEXT: =={{[0-9]+}}==# 1: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
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// CHECK-NEXT: =={{[0-9]+}}==# 2: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
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// CHECK-NEXT: =={{[0-9]+}}==# 3: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
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// CHECK: =={{[0-9]+}}== Samples array #1 at period 80 ms
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// CHECK-NEXT: =={{[0-9]+}}==# 0: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
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// CHECK: =={{[0-9]+}}== Samples array #2 at period 320 ms
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// CHECK: =={{[0-9]+}}== Samples array #3 at period 1280 ms
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// CHECK: =={{[0-9]+}}== Samples array #4 at period 5120 ms
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// CHECK: =={{[0-9]+}}== Samples array #5 at period 20 sec
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// CHECK: =={{[0-9]+}}== Samples array #6 at period 81 sec
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// CHECK: =={{[0-9]+}}== Samples array #7 at period 327 sec
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// CHECK: {{.*}} EfficiencySanitizer: the total working set size: 32 MB (5242{{[0-9][0-9]}} cache lines)
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return 0;
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}
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