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
|
//===-- randomtest.cpp ----------------------------------------------------===//
//
// The KLEE Symbolic Virtual Machine
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "klee/KDAlloc/kdalloc.h"
#include "xoshiro.h"
#if defined(USE_GTEST_INSTEAD_OF_MAIN)
#include "gtest/gtest.h"
#endif
#include <cassert>
#include <chrono>
#include <cmath>
#include <cstdint>
#include <cstdlib>
#include <iomanip>
#include <iostream>
#include <random>
#include <utility>
#include <vector>
namespace {
class RandomTest {
xoshiro512 rng;
klee::kdalloc::Allocator allocator;
std::vector<std::pair<void *, std::size_t>> allocations;
std::geometric_distribution<std::size_t> allocation_bin_distribution;
std::geometric_distribution<std::size_t> large_allocation_distribution;
public:
std::size_t maximum_concurrent_allocations = 0;
std::uint64_t allocation_count = 0;
std::uint64_t deallocation_count = 0;
RandomTest(std::uint64_t seed = 0x31337)
: rng(seed), allocator(klee::kdalloc::AllocatorFactory(
static_cast<std::size_t>(1) << 42, 0)),
allocation_bin_distribution(0.3),
large_allocation_distribution(0.00003) {}
void run(std::uint64_t const iterations) {
std::uniform_int_distribution<std::uint32_t> choice(0, 999);
for (std::uint64_t i = 0; i < iterations; ++i) {
auto chosen = choice(rng);
if (chosen < 650) {
++allocation_count;
allocate_sized();
} else if (chosen < 700) {
++allocation_count;
allocate_large();
} else if (chosen < 1000) {
++deallocation_count;
deallocate();
}
}
cleanup();
}
void cleanup() {
while (!allocations.empty()) {
auto choice = std::uniform_int_distribution<std::size_t>(
0, allocations.size() - 1)(rng);
assert(allocator.locationInfo(allocations[choice].first, 1) ==
klee::kdalloc::LocationInfo::LI_AllocatedOrQuarantined);
assert(allocator.locationInfo(allocations[choice].first,
allocations[choice].second) ==
klee::kdalloc::LocationInfo::LI_AllocatedOrQuarantined);
allocator.free(allocations[choice].first, allocations[choice].second);
assert(allocator.locationInfo(allocations[choice].first, 1) ==
klee::kdalloc::LocationInfo::LI_Unallocated);
assert(allocator.locationInfo(allocations[choice].first,
allocations[choice].second) ==
klee::kdalloc::LocationInfo::LI_Unallocated);
allocations[choice] = allocations.back();
allocations.pop_back();
}
}
void allocate_sized() {
auto bin = allocation_bin_distribution(rng);
while (bin >= 11) {
bin = allocation_bin_distribution(rng);
}
auto min = (bin == 0 ? 1 : (static_cast<std::size_t>(1) << (bin + 1)) + 1);
auto max = static_cast<std::size_t>(1) << (bin + 2);
auto size = std::uniform_int_distribution<std::size_t>(min, max)(rng);
allocations.emplace_back(allocator.allocate(size), size);
if (allocations.size() > maximum_concurrent_allocations) {
maximum_concurrent_allocations = allocations.size();
}
}
void allocate_large() {
auto size = 0;
while (size <= 4096 || size > 1073741825) {
size = large_allocation_distribution(rng) + 4097;
}
allocations.emplace_back(allocator.allocate(size), size);
if (allocations.size() > maximum_concurrent_allocations) {
maximum_concurrent_allocations = allocations.size();
}
}
void deallocate() {
if (allocations.empty()) {
return;
}
auto choice = std::uniform_int_distribution<std::size_t>(
0, allocations.size() - 1)(rng);
allocator.free(allocations[choice].first, allocations[choice].second);
allocations[choice] = allocations.back();
allocations.pop_back();
}
};
} // namespace
void random_test() {
auto start = std::chrono::steady_clock::now();
RandomTest tester;
tester.run(1'000'000);
auto stop = std::chrono::steady_clock::now();
std::cout << std::dec
<< std::chrono::duration_cast<std::chrono::milliseconds>(stop -
start)
.count()
<< " ms\n";
std::cout << "\n";
std::cout << "Allocations: " << tester.allocation_count << "\n";
std::cout << "Deallocations: " << tester.deallocation_count << "\n";
std::cout << "Maximum concurrent allocations: "
<< tester.maximum_concurrent_allocations << "\n";
exit(0);
}
#if defined(USE_GTEST_INSTEAD_OF_MAIN)
TEST(KDAllocDeathTest, Random) {
ASSERT_EXIT(random_test(), ::testing::ExitedWithCode(0), "");
}
#else
int main() { random_test(); }
#endif
|
