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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
// Copyright 2009 Google Inc. All Rights Reserved.
// Author: fikes@google.com (Andrew Fikes)
#include "config_for_unittests.h"
#include "page_heap.h"
#include "system-alloc.h"
#include <stdio.h>
#include "base/logging.h"
#include "common.h"
DECLARE_int64(tcmalloc_heap_limit_mb);
namespace {
// The system will only release memory if the block size is equal or hight than
// system page size.
static bool HaveSystemRelease =
TCMalloc_SystemRelease(
TCMalloc_SystemAlloc(getpagesize(), NULL, 0), getpagesize());
static void CheckStats(const tcmalloc::PageHeap* ph,
uint64_t system_pages,
uint64_t free_pages,
uint64_t unmapped_pages) {
tcmalloc::PageHeap::Stats stats = ph->stats();
if (!HaveSystemRelease) {
free_pages += unmapped_pages;
unmapped_pages = 0;
}
EXPECT_EQ(system_pages, stats.system_bytes >> kPageShift);
EXPECT_EQ(free_pages, stats.free_bytes >> kPageShift);
EXPECT_EQ(unmapped_pages, stats.unmapped_bytes >> kPageShift);
}
static void TestPageHeap_Stats() {
tcmalloc::PageHeap* ph = new tcmalloc::PageHeap();
// Empty page heap
CheckStats(ph, 0, 0, 0);
// Allocate a span 's1'
tcmalloc::Span* s1 = ph->New(256);
CheckStats(ph, 256, 0, 0);
// Split span 's1' into 's1', 's2'. Delete 's2'
tcmalloc::Span* s2 = ph->Split(s1, 128);
ph->Delete(s2);
CheckStats(ph, 256, 128, 0);
// Unmap deleted span 's2'
ph->ReleaseAtLeastNPages(1);
CheckStats(ph, 256, 0, 128);
// Delete span 's1'
ph->Delete(s1);
CheckStats(ph, 256, 128, 128);
delete ph;
}
static void TestPageHeap_Limit() {
tcmalloc::PageHeap* ph = new tcmalloc::PageHeap();
CHECK_EQ(kMaxPages, 1 << (20 - kPageShift));
// We do not know much is taken from the system for other purposes,
// so we detect the proper limit:
{
FLAGS_tcmalloc_heap_limit_mb = 1;
tcmalloc::Span* s = NULL;
while((s = ph->New(kMaxPages)) == NULL) {
FLAGS_tcmalloc_heap_limit_mb++;
}
FLAGS_tcmalloc_heap_limit_mb += 9;
ph->Delete(s);
// We are [10, 11) mb from the limit now.
}
// Test AllocLarge and GrowHeap first:
{
tcmalloc::Span * spans[10];
for (int i=0; i<10; ++i) {
spans[i] = ph->New(kMaxPages);
EXPECT_NE(spans[i], NULL);
}
EXPECT_EQ(ph->New(kMaxPages), NULL);
for (int i=0; i<10; i += 2) {
ph->Delete(spans[i]);
}
tcmalloc::Span *defragmented = ph->New(5 * kMaxPages);
if (HaveSystemRelease) {
// EnsureLimit should release deleted normal spans
EXPECT_NE(defragmented, NULL);
EXPECT_TRUE(ph->CheckExpensive());
ph->Delete(defragmented);
}
else
{
EXPECT_EQ(defragmented, NULL);
EXPECT_TRUE(ph->CheckExpensive());
}
for (int i=1; i<10; i += 2) {
ph->Delete(spans[i]);
}
}
// Once again, testing small lists this time (twice smaller spans):
{
tcmalloc::Span * spans[20];
for (int i=0; i<20; ++i) {
spans[i] = ph->New(kMaxPages >> 1);
EXPECT_NE(spans[i], NULL);
}
// one more half size allocation may be possible:
tcmalloc::Span * lastHalf = ph->New(kMaxPages >> 1);
EXPECT_EQ(ph->New(kMaxPages >> 1), NULL);
for (int i=0; i<20; i += 2) {
ph->Delete(spans[i]);
}
for(Length len = kMaxPages >> 2; len < 5 * kMaxPages; len = len << 1)
{
if(len <= kMaxPages >> 1 || HaveSystemRelease) {
tcmalloc::Span *s = ph->New(len);
EXPECT_NE(s, NULL);
ph->Delete(s);
}
}
EXPECT_TRUE(ph->CheckExpensive());
for (int i=1; i<20; i += 2) {
ph->Delete(spans[i]);
}
if (lastHalf != NULL) {
ph->Delete(lastHalf);
}
}
delete ph;
}
} // namespace
int main(int argc, char **argv) {
TestPageHeap_Stats();
TestPageHeap_Limit();
printf("PASS\n");
// on windows as part of library destructors we call getenv which
// calls malloc which fails due to our exhausted heap limit. It then
// causes fancy stack overflow because log message we're printing
// for failed allocation somehow cause malloc calls too
//
// To keep us out of trouble we just drop malloc limit
FLAGS_tcmalloc_heap_limit_mb = 0;
return 0;
}
|
