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
|
// Copyright 2019 The TCMalloc Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// These tests assume TCMalloc is not linked in, and therefore the features
// exposed by MallocExtension should be no-ops, but otherwise safe to call.
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "absl/random/random.h"
#include "tcmalloc/malloc_extension.h"
namespace tcmalloc {
namespace {
TEST(MallocExtension, SnapshotCurrentIsEmpty) {
// Allocate memory to use the allocator.
absl::BitGen gen;
int bytes_remaining = 1 << 24;
std::vector<void*> ptrs;
while (bytes_remaining > 0) {
int size = absl::LogUniform<int>(gen, 0, 1 << 20);
ptrs.push_back(::operator new(size));
bytes_remaining -= size;
}
// All of the profiles should be empty.
ProfileType types[] = {
ProfileType::kHeap,
ProfileType::kFragmentation, ProfileType::kPeakHeap,
ProfileType::kAllocations,
};
for (auto t : types) {
SCOPED_TRACE(static_cast<int>(t));
Profile p = MallocExtension::SnapshotCurrent(t);
int samples = 0;
p.Iterate([&](const Profile::Sample&) { samples++; });
EXPECT_EQ(samples, 0);
}
for (void* ptr : ptrs) {
::operator delete(ptr);
}
}
TEST(MallocExtension, AllocationProfile) {
auto token = MallocExtension::StartAllocationProfiling();
// Allocate memory to use the allocator.
absl::BitGen gen;
int bytes_remaining = 1 << 24;
std::vector<void*> ptrs;
while (bytes_remaining > 0) {
int size = absl::LogUniform<int>(gen, 0, 1 << 20);
ptrs.push_back(::operator new(size));
bytes_remaining -= size;
}
// Finish profiling and verify the profile is empty.
Profile p = std::move(token).Stop();
int samples = 0;
p.Iterate([&](const Profile::Sample&) { samples++; });
EXPECT_EQ(samples, 0);
for (void* ptr : ptrs) {
::operator delete(ptr);
}
}
} // namespace
} // namespace tcmalloc
|
