diff options
Diffstat (limited to 'tests/auto/exceptionsafety_objects/oomsimulator.h')
-rw-r--r-- | tests/auto/exceptionsafety_objects/oomsimulator.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/tests/auto/exceptionsafety_objects/oomsimulator.h b/tests/auto/exceptionsafety_objects/oomsimulator.h new file mode 100644 index 0000000..1b092ea --- /dev/null +++ b/tests/auto/exceptionsafety_objects/oomsimulator.h @@ -0,0 +1,175 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <malloc.h> + +/* 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(); +} + +static bool mallocFailActive = false; +static int mallocFailIndex = 0; +static int mallocCount = 0; +static int freeCount = 0; + +struct AllocFailActivator +{ + inline AllocFailActivator() { mallocFailActive = true; } + inline ~AllocFailActivator() { mallocFailActive = false; } + + inline void deactivate() { mallocFailActive = false; } +}; + +void *my_malloc_hook(size_t size, const void *) +{ + if (mallocFailActive && --mallocFailIndex < 0) + return 0; // simulate OOM + + __malloc_hook = old_malloc_hook; + void *result = ::malloc (size); + __malloc_hook = my_malloc_hook; + + ++mallocCount; + return result; +} + +void *my_memalign_hook(size_t alignment, size_t size, const void *) +{ + if (mallocFailActive && --mallocFailIndex < 0) + return 0; // simulate OOM + + __memalign_hook = old_memalign_hook; + void *result = ::memalign(alignment, size); + __memalign_hook = my_memalign_hook; + + ++mallocCount; + return result; +} + +void *my_realloc_hook(void *ptr, size_t size, const void *) +{ + 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; + + if (!ptr) // realloc on a 0 pointer equals a new allocation + ++mallocCount; + return result; +} + +void my_free_hook(void *ptr, const void *) +{ + __free_hook = old_free_hook; + ::free(ptr); + __free_hook = my_free_hook; + + ++freeCount; +} + +static void *new_helper(std::size_t size) +{ + void *ptr = malloc(size); + if (!ptr) + throw std::bad_alloc(); + return ptr; +} + +// 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); } + +// ignore placement new and placement delete - those don't allocate. + + |