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
|
//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: c++03
// Necessary because we include a private header of libc++abi, which
// only understands _LIBCXXABI_HAS_NO_THREADS.
#include "test_macros.h"
#ifdef TEST_HAS_NO_THREADS
# define _LIBCXXABI_HAS_NO_THREADS
#endif
#define TESTING_CXA_GUARD
#include "../src/cxa_guard_impl.h"
#include <cassert>
#if defined(__clang__)
# pragma clang diagnostic ignored "-Wtautological-pointer-compare"
#elif defined(__GNUC__)
# pragma GCC diagnostic ignored "-Waddress"
#endif
using namespace __cxxabiv1;
template <class GuardType, class Impl>
struct Tests {
private:
Tests() : g{}, impl(&g) {}
GuardType g;
Impl impl;
uint8_t first_byte() {
uint8_t first;
std::memcpy(&first, &g, 1);
return first;
}
void reset() { g = {}; }
public:
// Test the post conditions on cxa_guard_acquire, cxa_guard_abort, and
// cxa_guard_release. Specifically, that they leave the first byte with
// the value 0 or 1 as specified by the ARM or Itanium specification.
static void test() {
Tests tests;
tests.test_acquire();
tests.test_abort();
tests.test_release();
}
void test_acquire() {
{
reset();
assert(first_byte() == 0);
assert(impl.cxa_guard_acquire() == INIT_IS_PENDING);
assert(first_byte() == 0);
}
{
reset();
assert(first_byte() == 0);
assert(impl.cxa_guard_acquire() == INIT_IS_PENDING);
impl.cxa_guard_release();
assert(first_byte() == 1);
assert(impl.cxa_guard_acquire() == INIT_IS_DONE);
}
}
void test_release() {
{
reset();
assert(first_byte() == 0);
assert(impl.cxa_guard_acquire() == INIT_IS_PENDING);
assert(first_byte() == 0);
impl.cxa_guard_release();
assert(first_byte() == 1);
}
}
void test_abort() {
{
reset();
assert(first_byte() == 0);
assert(impl.cxa_guard_acquire() == INIT_IS_PENDING);
assert(first_byte() == 0);
impl.cxa_guard_abort();
assert(first_byte() == 0);
assert(impl.cxa_guard_acquire() == INIT_IS_PENDING);
assert(first_byte() == 0);
}
}
};
struct NopMutex {
bool lock() {
assert(!is_locked);
is_locked = true;
return false;
}
bool unlock() {
assert(is_locked);
is_locked = false;
return false;
}
private:
bool is_locked = false;
};
NopMutex global_nop_mutex = {};
struct NopCondVar {
bool broadcast() { return false; }
bool wait(NopMutex&) { return false; }
};
NopCondVar global_nop_cond = {};
void NopFutexWait(int*, int) { assert(false); }
void NopFutexWake(int*) { assert(false); }
uint32_t MockGetThreadID() { return 0; }
int main(int, char**) {
{
#if defined(TEST_HAS_NO_THREADS)
static_assert(CurrentImplementation == Implementation::NoThreads, "");
static_assert(std::is_same<SelectedImplementation, NoThreadsGuard>::value, "");
#else
static_assert(CurrentImplementation == Implementation::GlobalMutex, "");
static_assert(std::is_same<SelectedImplementation,
GlobalMutexGuard<LibcppMutex, LibcppCondVar, GlobalStatic<LibcppMutex>::instance,
GlobalStatic<LibcppCondVar>::instance>>::value,
"");
#endif
}
{
#if (defined(__APPLE__) || defined(__linux__)) && !defined(TEST_HAS_NO_THREADS)
assert(PlatformThreadID);
#endif
if (PlatformThreadID != nullptr) {
assert(PlatformThreadID() != 0);
assert(PlatformThreadID() == PlatformThreadID());
}
}
{
Tests<uint32_t, NoThreadsGuard>::test();
Tests<uint64_t, NoThreadsGuard>::test();
}
{
using MutexImpl = GlobalMutexGuard<NopMutex, NopCondVar, global_nop_mutex, global_nop_cond, MockGetThreadID>;
Tests<uint32_t, MutexImpl>::test();
Tests<uint64_t, MutexImpl>::test();
}
{
using FutexImpl = FutexGuard<&NopFutexWait, &NopFutexWake, &MockGetThreadID>;
Tests<uint32_t, FutexImpl>::test();
Tests<uint64_t, FutexImpl>::test();
}
return 0;
}
|
