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
|
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "debugfreehook.h"
#include "bindingmanager.h"
#include "gilstate.h"
#if defined(_WIN32) && defined(_DEBUG)
# include <sbkwindows.h>
# include <crtdbg.h>
#endif
#ifdef __GLIBC__
#include <malloc.h>
#endif
#ifdef __APPLE__
#include <malloc/malloc.h>
#include <mach/mach.h>
#include <mach/mach_vm.h>
#endif
#ifdef SHIBOKEN_INSTALL_FREE_DEBUG_HOOK
extern "C" {
static int testPointerBeingFreed(void *ptr)
{
// It is an error for a deleted pointer address to still be registered
// in the BindingManager
if (Shiboken::BindingManager::instance().hasWrapper(ptr)) {
Shiboken::GilState state;
SbkObject *wrapper = Shiboken::BindingManager::instance().retrieveWrapper(ptr);
fprintf(stderr, "SbkObject still in binding map when deleted: ");
PyObject_Print(reinterpret_cast<PyObject *>(wrapper), stderr, 0);
fprintf(stderr, "\n");
#ifdef _WIN32
DebugBreak();
#else
assert(0);
#endif
return FALSE;
}
return TRUE;
}
#if defined(_WIN32) && defined(_DEBUG)
static _CRT_ALLOC_HOOK lastCrtAllocHook;
static int DebugAllocHook(int nAllocType, void *pvData,
size_t nSize, int nBlockUse, long lRequest,
const unsigned char * szFileName, int nLine)
{
// It is an error for a deleted pointer address to still be registered
// in the BindingManager
if ( nAllocType == _HOOK_FREE) {
if ( !testPointerBeingFreed(pvData) ) {
return 0;
}
}
if ( lastCrtAllocHook != NULL ) {
return lastCrtAllocHook(nAllocType, pvData, nSize, nBlockUse, lRequest,
szFileName, nLine);
}
return 1;
}
#endif // _WIN32 && _DEBUG
#ifdef __GLIBC__
static void (*lastFreeHook)(void *ptr, const void *caller);
static void DebugFreeHook(void *ptr, const void *caller)
{
testPointerBeingFreed(ptr);
if ( lastFreeHook != NULL )
lastFreeHook(ptr, caller);
}
#endif // __GLIBC__
#ifdef __APPLE__
static malloc_zone_t lastMallocZone;
static void DebugFreeHook(malloc_zone_t *zone, void *ptr)
{
testPointerBeingFreed(ptr);
if ( lastMallocZone.free != NULL )
lastMallocZone.free(zone, ptr);
}
static void DebugFreeDefiniteSizeHook(malloc_zone_t *zone, void *ptr, size_t size)
{
testPointerBeingFreed(ptr);
if ( lastMallocZone.free_definite_size != NULL )
lastMallocZone.free_definite_size(zone, ptr, size);
}
#endif __APPLE__
void debugInstallFreeHook(void)
{
#if defined(_WIN32) && defined(_DEBUG)
lastCrtAllocHook = _CrtSetAllocHook(DebugAllocHook);
#endif
#ifdef __GLIBC__
// __free_hook is not thread safe so it marked as deprecated. Use here
// is hopefully safe and should catch errors in a single threaded program
// and only miss some in a multithreaded program
lastFreeHook = __free_hook;
__free_hook = DebugFreeHook;
#endif
#ifdef __APPLE__
malloc_zone_t *zone = malloc_default_zone();
assert(zone != NULL);
//remove the write protection from the zone struct
if (zone->version >= 8) {
vm_protect(mach_task_self(), (uintptr_t)zone, sizeof(*zone), 0, VM_PROT_READ | VM_PROT_WRITE);
}
lastMallocZone = *zone;
zone->free = DebugFreeHook;
zone->free_definite_size = DebugFreeDefiniteSizeHook;
if (zone->version >= 8) {
vm_protect(mach_task_self(), (uintptr_t)zone, sizeof(*zone), 0, VM_PROT_READ);
}
#endif
}
void debugRemoveFreeHook(void)
{
#if defined(_WIN32) && defined(_DEBUG)
_CrtSetAllocHook(lastCrtAllocHook);
#endif
#ifdef __GLIBC__
__free_hook = lastFreeHook;
#endif
#ifdef __APPLE__
malloc_zone_t *zone = malloc_default_zone();
assert(zone != NULL);
//remove the write protection from the zone struct
if (zone->version >= 8) {
vm_protect(mach_task_self(), (uintptr_t)zone, sizeof(*zone), 0, VM_PROT_READ | VM_PROT_WRITE);
}
zone->free = lastMallocZone.free;
zone->free_definite_size = lastMallocZone.free_definite_size;
if (zone->version >= 8) {
vm_protect(mach_task_self(), (uintptr_t)zone, sizeof(*zone), 0, VM_PROT_READ);
}
#endif
}
} // extern "C"
#endif // SHIBOKEN_INSTALL_DEBUG_FREE_HOOK
|
