1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
// Test how creating and joining a lot of threads making only a few allocations
// each affect total quarantine (and overall heap) size.
// RUN: %clangxx_asan %s -o %t
// RUN: %env_asan_opts=thread_local_quarantine_size_kb=64:quarantine_size_mb=1:allocator_release_to_os_interval_ms=-1 %run %t 2>&1 | \
// RUN: FileCheck %s --allow-empty --check-prefix=CHECK-SMALL-LOCAL-CACHE-SMALL-OVERHEAD
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sanitizer/allocator_interface.h>
// Thread local quarantine is merged to the global one when thread exits and
// this scenario (a few allocations per thread) used to generate a huge overhead
// of practically empty quarantine batches (one per thread).
static const size_t kHeapSizeIncrementLimit = 2 << 20;
static const int kNumThreads = 2048;
// The allocation size is so small because all we want to test is that
// quarantine block merging process does not leak memory used for quarantine
// blocks.
// TODO(alekseyshl): Add more comprehensive test verifying quarantine size
// directly (requires quarantine stats exposed in allocator stats and API).
static const int kAllocSize = 1;
void *ThreadFn(void *unused) {
char *temp = new char[kAllocSize];
memset(temp, -1, kAllocSize);
delete [] (temp);
return NULL;
}
int main() {
// Warm up all internal structures.
pthread_t t;
pthread_create(&t, 0, ThreadFn, 0);
pthread_join(t, 0);
size_t heap_size = __sanitizer_get_heap_size();
fprintf(stderr, "Heap size: %zd\n", heap_size);
for (int i = 0; i < kNumThreads; i++) {
pthread_t t;
pthread_create(&t, 0, ThreadFn, 0);
pthread_join(t, 0);
size_t new_heap_size = __sanitizer_get_heap_size();
}
size_t new_heap_size = __sanitizer_get_heap_size();
fprintf(stderr, "New heap size: %zd\n", new_heap_size);
if (new_heap_size - heap_size < kHeapSizeIncrementLimit)
fprintf(stderr, "Heap growth is within limits\n");
}
// CHECK-SMALL-LOCAL-CACHE-SMALL-OVERHEAD: Heap growth is within limits
|
