1// Copyright 2009 Google Inc. All Rights Reserved.
2// Author: fikes@google.com (Andrew Fikes)
3
4#include "config_for_unittests.h"
5#include "page_heap.h"
6#include <stdio.h>
7#include "base/logging.h"
8#include "common.h"
9
10namespace {
11
12static void CheckStats(const tcmalloc::PageHeap* ph,
13                       uint64_t system_pages,
14                       uint64_t free_pages,
15                       uint64_t unmapped_pages) {
16  tcmalloc::PageHeap::Stats stats = ph->stats();
17  EXPECT_EQ(system_pages, stats.system_bytes >> kPageShift);
18  EXPECT_EQ(free_pages, stats.free_bytes >> kPageShift);
19  EXPECT_EQ(unmapped_pages, stats.unmapped_bytes >> kPageShift);
20}
21
22static void TestPageHeap_Stats() {
23  tcmalloc::PageHeap* ph = new tcmalloc::PageHeap();
24
25  // Empty page heap
26  CheckStats(ph, 0, 0, 0);
27
28  // Allocate a span 's1'
29  tcmalloc::Span* s1 = ph->New(256);
30  CheckStats(ph, 256, 0, 0);
31
32  // Split span 's1' into 's1', 's2'.  Delete 's2'
33  tcmalloc::Span* s2 = ph->Split(s1, 128);
34  Length s2_len = s2->length;
35  ph->Delete(s2);
36  CheckStats(ph, 256, 128, 0);
37
38  // Unmap deleted span 's2'
39  EXPECT_EQ(s2_len, ph->ReleaseAtLeastNPages(1));
40  CheckStats(ph, 256, 0, 128);
41
42  // Delete span 's1'
43  ph->Delete(s1);
44  CheckStats(ph, 256, 128, 128);
45
46  delete ph;
47}
48
49}  // namespace
50
51int main(int argc, char **argv) {
52  TestPageHeap_Stats();
53  printf("PASS\n");
54  return 0;
55}
56