summaryrefslogtreecommitdiffstats
path: root/tests/auto/exceptionsafety_objects/oomsimulator.h
blob: 8f023e5f9aff54db2164083a72ad6d8de15fd947 (plain)
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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef Q_OS_SYMBIAN
#include <malloc.h>
#endif
#include <limits.h>
#include <stdio.h>
#include <exception>

#if !defined(Q_OS_WIN) && !defined(Q_OS_SYMBIAN)
#  include "3rdparty/memcheck.h"
#endif

static bool mallocFailActive = false;
static int mallocFailIndex = 0;
static int mallocCount = 0;

static void my_terminate_handler()
{
    // set a breakpoint here to get a backtrace for your uncaught exceptions
    fprintf(stderr, "Uncaught Exception Detected. Set a breakpoint in my_terminate_handler()\n");
    exit(1);
}

#ifdef __GLIBC__
/* Use glibc's memory allocation hooks */

/* our hooks */
static void *my_malloc_hook(size_t, const void *);
static void *my_realloc_hook(void *, size_t, const void *);
static void *my_memalign_hook(size_t, size_t, const void *);
static void my_free_hook(void *, const void *);

/* original hooks. */
static void *(*old_malloc_hook)(size_t, const void *);
static void *(*old_realloc_hook)(void *, size_t, const void *);
static void *(*old_memalign_hook)(size_t, size_t, const void *);
static void (*old_free_hook)(void *, const void *);

/* initializer function */
static void my_init_hook();

/* Override initialising hook from the C library. */
void (*__malloc_initialize_hook) (void) = my_init_hook;

static void disableHooks()
{
    __malloc_hook = old_malloc_hook;
    __realloc_hook = old_realloc_hook;
    __memalign_hook = old_memalign_hook;
    __free_hook = old_free_hook;
}

static void enableHooks()
{
    __malloc_hook = my_malloc_hook;
    __realloc_hook = my_realloc_hook;
    __memalign_hook = my_memalign_hook;
    __free_hook = my_free_hook;
}

void my_init_hook()
{
    old_malloc_hook = __malloc_hook;
    old_realloc_hook = __realloc_hook;
    old_memalign_hook = __memalign_hook;
    old_free_hook = __free_hook;
    enableHooks();
}

void *my_malloc_hook(size_t size, const void *)
{
    ++mallocCount;

    if (mallocFailActive && --mallocFailIndex < 0)
        return 0; // simulate OOM

    __malloc_hook = old_malloc_hook;
    void *result = ::malloc (size);
    __malloc_hook = my_malloc_hook;

    return result;
}

void *my_memalign_hook(size_t alignment, size_t size, const void *)
{
    ++mallocCount;

    if (mallocFailActive && --mallocFailIndex < 0)
        return 0; // simulate OOM

    __memalign_hook = old_memalign_hook;
    void *result = ::memalign(alignment, size);
    __memalign_hook = my_memalign_hook;

    return result;
}

void *my_realloc_hook(void *ptr, size_t size, const void *)
{
    ++mallocCount;

    if (mallocFailActive && --mallocFailIndex < 0)
        return 0; // simulate OOM

    __realloc_hook = old_realloc_hook;
    __malloc_hook = old_malloc_hook;
    void *result = ::realloc(ptr, size);
    __malloc_hook = my_malloc_hook;
    __realloc_hook = my_realloc_hook;

    return result;
}

void my_free_hook(void *ptr, const void *)
{
    __free_hook = old_free_hook;
    ::free(ptr);
    __free_hook = my_free_hook;
}

#elif defined(Q_CC_MSVC)

#include "crtdbg.h"

static int qCrtAllocHook(int allocType, void * /*userData*/, size_t /*size*/,
                         int blockType, long /*requestNumber*/,
                         const unsigned char * /*filename*/, int /*lineNumber*/)
{
    if (blockType == _CRT_BLOCK)
        return TRUE; // ignore allocations from the C library

    switch (allocType) {
        case _HOOK_ALLOC:
        case _HOOK_REALLOC:
            ++mallocCount;
            if (mallocFailActive && --mallocFailIndex < 0)
                return FALSE; // simulate OOM
    }

    return TRUE;
}

static struct QCrtDebugRegistrator
{
    QCrtDebugRegistrator()
    {
        _CrtSetAllocHook(qCrtAllocHook);
    }

} crtDebugRegistrator;

#elif defined(Q_OS_SYMBIAN)

struct QAllocFailAllocator : public RAllocator
{
    QAllocFailAllocator() : allocator(User::Allocator())
    {
        User::SwitchAllocator(this);
    }

    ~QAllocFailAllocator()
    {
        User::SwitchAllocator(&allocator);
    }

    RAllocator& allocator;

    // from MAllocator
    TAny* Alloc(TInt aSize)
    {
        ++mallocCount;
        if (mallocFailActive && --mallocFailIndex < 0)
            return 0; // simulate OOM
        return allocator.Alloc(aSize);
    }

    void Free(TAny* aPtr)
    {
        allocator.Free(aPtr);
    }

    TAny* ReAlloc(TAny* aPtr, TInt aSize, TInt aMode)
    {
        ++mallocCount;
        if (mallocFailActive && --mallocFailIndex < 0)
            return 0; // simulate OOM
        return allocator.ReAlloc(aPtr, aSize, aMode);
    }

    TInt AllocLen(const TAny* aCell) const
    {
        return allocator.AllocLen(aCell);
    }

    TInt Compress()
    {
        return allocator.Compress();
    }

    void Reset()
    {
        allocator.Reset();
    }

    TInt AllocSize(TInt& aTotalAllocSize) const
    {
        return allocator.AllocSize(aTotalAllocSize);
    }

    TInt Available(TInt& aBiggestBlock) const
    {
        return allocator.Available(aBiggestBlock);
    }

    TInt DebugFunction(TInt aFunc, TAny* a1, TAny* a2)
    {
        return allocator.DebugFunction(aFunc, a1, a2);
    }

    TInt Extension_(TUint aExtensionId, TAny*& a0, TAny* a1)
    {
        return ((MAllocator&)allocator).Extension_(aExtensionId, a0, a1);
    }
};

QAllocFailAllocator symbianTestAllocator;

#endif

struct AllocFailer
{
    inline AllocFailer(int index) { reactivateAt(index); }
    inline ~AllocFailer() { deactivate(); }

    inline void reactivateAt(int index)
    {
#ifdef RUNNING_ON_VALGRIND
        if (RUNNING_ON_VALGRIND)
            VALGRIND_ENABLE_OOM_AT_ALLOC_INDEX(VALGRIND_GET_ALLOC_INDEX + index + 1);
#endif
        mallocFailIndex = index;
        mallocFailActive = true;
    }

    inline void deactivate()
    {
        mallocFailActive = false;
#ifdef RUNNING_ON_VALGRIND
        VALGRIND_ENABLE_OOM_AT_ALLOC_INDEX(0);
#endif
    }

    inline int currentAllocIndex() const
    {
#ifdef RUNNING_ON_VALGRIND
        if (RUNNING_ON_VALGRIND)
            return VALGRIND_GET_ALLOC_INDEX;
#endif
        return mallocCount;
    }

    static bool initialize()
    {
        std::set_terminate(my_terminate_handler);
#ifdef RUNNING_ON_VALGRIND
        if (RUNNING_ON_VALGRIND) {
            if (VALGRIND_GET_ALLOC_INDEX == -1u) {
                qWarning("You must use a valgrind with oom simulation support");
                return false;
            }
            // running in valgrind - don't use glibc hooks
            disableHooks();

            // never stop simulating OOM
            VALGRIND_DISABLE_OOM_AT_ALLOC_INDEX(-1u);
        }
#endif
         return true;
    }
};

#ifndef Q_OS_SYMBIAN

static void *new_helper(std::size_t size)
{
    void *ptr = malloc(size);
    if (!ptr)
        throw std::bad_alloc();
    return ptr;
}

#ifdef Q_CC_MSVC
#  pragma warning(push)
#  pragma warning(disable: 4290)
#endif

// overload operator new
void* operator new(size_t size) throw (std::bad_alloc) { return new_helper(size); }
void* operator new[](size_t size) throw (std::bad_alloc) { return new_helper(size); }
void* operator new(size_t size, const std::nothrow_t&) throw() { return malloc(size); }
void* operator new[](std::size_t size, const std::nothrow_t&) throw() { return malloc(size); }

// overload operator delete
void operator delete(void *ptr) throw() { if (ptr) free(ptr); }
void operator delete[](void *ptr) throw() { if (ptr) free(ptr); }
void operator delete(void *ptr, const std::nothrow_t&) throw() { if (ptr) free(ptr); }
void operator delete[](void *ptr, const std::nothrow_t&) throw() { if (ptr) free (ptr); }

#ifdef Q_CC_MSVC
#  pragma warning(pop)
#endif

#endif

// ignore placement new and placement delete - those don't allocate.