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
|
//===-- secondary_test.cpp --------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "secondary.h"
#include "gtest/gtest.h"
#include <stdio.h>
#include <condition_variable>
#include <mutex>
#include <thread>
TEST(ScudoSecondaryTest, SecondaryBasic) {
scudo::GlobalStats S;
S.init();
scudo::MapAllocator *L = new scudo::MapAllocator;
L->init(&S);
const scudo::uptr Size = 1U << 16;
void *P = L->allocate(Size);
EXPECT_NE(P, nullptr);
memset(P, 'A', Size);
EXPECT_GE(scudo::MapAllocator::getBlockSize(P), Size);
L->deallocate(P);
EXPECT_DEATH(memset(P, 'A', Size), "");
const scudo::uptr Align = 1U << 16;
P = L->allocate(Size + Align, Align);
EXPECT_NE(P, nullptr);
void *AlignedP = reinterpret_cast<void *>(
scudo::roundUpTo(reinterpret_cast<scudo::uptr>(P), Align));
memset(AlignedP, 'A', Size);
L->deallocate(P);
std::vector<void *> V;
for (scudo::uptr I = 0; I < 32U; I++)
V.push_back(L->allocate(Size));
std::random_shuffle(V.begin(), V.end());
while (!V.empty()) {
L->deallocate(V.back());
V.pop_back();
}
scudo::ScopedString Str(1024);
L->getStats(&Str);
Str.output();
}
// This exercises a variety of combinations of size and alignment for the
// MapAllocator. The size computation done here mimic the ones done by the
// combined allocator.
TEST(ScudoSecondaryTest, SecondaryCombinations) {
constexpr scudo::uptr MinAlign = FIRST_32_SECOND_64(8, 16);
constexpr scudo::uptr HeaderSize = scudo::roundUpTo(8, MinAlign);
scudo::MapAllocator *L = new scudo::MapAllocator;
L->init(nullptr);
for (scudo::uptr SizeLog = 0; SizeLog <= 20; SizeLog++) {
for (scudo::uptr AlignLog = FIRST_32_SECOND_64(3, 4); AlignLog <= 16;
AlignLog++) {
const scudo::uptr Align = 1U << AlignLog;
for (scudo::sptr Delta = -128; Delta <= 128; Delta += 8) {
if (static_cast<scudo::sptr>(1U << SizeLog) + Delta <= 0)
continue;
const scudo::uptr UserSize =
scudo::roundUpTo((1U << SizeLog) + Delta, MinAlign);
const scudo::uptr Size =
HeaderSize + UserSize + (Align > MinAlign ? Align - HeaderSize : 0);
void *P = L->allocate(Size, Align);
EXPECT_NE(P, nullptr);
void *AlignedP = reinterpret_cast<void *>(
scudo::roundUpTo(reinterpret_cast<scudo::uptr>(P), Align));
memset(AlignedP, 0xff, UserSize);
L->deallocate(P);
}
}
}
scudo::ScopedString Str(1024);
L->getStats(&Str);
Str.output();
}
TEST(ScudoSecondaryTest, SecondaryIterate) {
scudo::MapAllocator *L = new scudo::MapAllocator;
L->init(nullptr);
std::vector<void *> V;
const scudo::uptr PageSize = scudo::getPageSizeCached();
for (scudo::uptr I = 0; I < 32U; I++)
V.push_back(L->allocate((std::rand() % 16) * PageSize));
auto Lambda = [V](scudo::uptr Block) {
EXPECT_NE(std::find(V.begin(), V.end(), reinterpret_cast<void *>(Block)),
V.end());
};
L->disable();
L->iterateOverBlocks(Lambda);
L->enable();
while (!V.empty()) {
L->deallocate(V.back());
V.pop_back();
}
scudo::ScopedString Str(1024);
L->getStats(&Str);
Str.output();
}
static std::mutex Mutex;
static std::condition_variable Cv;
static bool Ready = false;
static void performAllocations(scudo::MapAllocator *L) {
std::vector<void *> V;
const scudo::uptr PageSize = scudo::getPageSizeCached();
{
std::unique_lock<std::mutex> Lock(Mutex);
while (!Ready)
Cv.wait(Lock);
}
for (scudo::uptr I = 0; I < 32U; I++)
V.push_back(L->allocate((std::rand() % 16) * PageSize));
while (!V.empty()) {
L->deallocate(V.back());
V.pop_back();
}
}
TEST(ScudoSecondaryTest, SecondaryThreadsRace) {
scudo::MapAllocator *L = new scudo::MapAllocator;
L->init(nullptr);
std::thread Threads[10];
for (scudo::uptr I = 0; I < 10U; I++)
Threads[I] = std::thread(performAllocations, L);
{
std::unique_lock<std::mutex> Lock(Mutex);
Ready = true;
Cv.notify_all();
}
for (auto &T : Threads)
T.join();
scudo::ScopedString Str(1024);
L->getStats(&Str);
Str.output();
}
|
