summaryrefslogtreecommitdiff
path: root/src/gallium/auxiliary/util/p_debug_mem.c
blob: 9511479cbbe367371970d316f490c0d0d02bb834 (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
/**************************************************************************
 * 
 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/

/**
 * @file
 * Memory debugging.
 * 
 * @author José Fonseca <jrfonseca@tungstengraphics.com>
 */

#include "pipe/p_config.h" 

#if defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
#include <windows.h>
#include <winddi.h>
#elif defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT)
#include <wdm.h>
#else
#include <stdio.h>
#include <stdlib.h>
#endif

#include "pipe/p_debug.h" 
#include "util/u_double_list.h" 


#define DEBUG_MEMORY_MAGIC 0x6e34090aU 


#if defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY) && !defined(WINCE)
#define real_malloc(_size) EngAllocMem(0, _size, 'D3AG')
#define real_free(_ptr) EngFreeMem(_ptr)
#elif defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT)
#define real_malloc(_size) ExAllocatePool(0, _size)
#define real_free(_ptr) ExFreePool(_ptr)
#else
#define real_malloc(_size) malloc(_size)
#define real_free(_ptr) free(_ptr)
#endif


struct debug_memory_header 
{
   struct list_head head;
   
   unsigned long no;
   const char *file;
   unsigned line;
   const char *function;
   size_t size;
   unsigned magic;
};

struct debug_memory_footer
{
   unsigned magic;
};


static struct list_head list = { &list, &list };

static unsigned long last_no = 0;


static INLINE struct debug_memory_header *
header_from_data(void *data)
{
   if(data)
      return (struct debug_memory_header *)((char *)data - sizeof(struct debug_memory_header));
   else
      return NULL;
}

static INLINE void *
data_from_header(struct debug_memory_header *hdr)
{
   if(hdr)
      return (void *)((char *)hdr + sizeof(struct debug_memory_header));
   else
      return NULL;
}

static INLINE struct debug_memory_footer *
footer_from_header(struct debug_memory_header *hdr)
{
   if(hdr)
      return (struct debug_memory_footer *)((char *)hdr + sizeof(struct debug_memory_header) + hdr->size);
   else
      return NULL;
}


void *
debug_malloc(const char *file, unsigned line, const char *function,
             size_t size) 
{
   struct debug_memory_header *hdr;
   struct debug_memory_footer *ftr;
   
   hdr = real_malloc(sizeof(*hdr) + size + sizeof(*ftr));
   if(!hdr) {
      debug_printf("%s:%u:%s: out of memory when trying to allocate %lu bytes\n",
                   file, line, function,
                   (long unsigned)size);
      return NULL;
   }
 
   hdr->no = last_no++;
   hdr->file = file;
   hdr->line = line;
   hdr->function = function;
   hdr->size = size;
   hdr->magic = DEBUG_MEMORY_MAGIC;

   ftr = footer_from_header(hdr);
   ftr->magic = DEBUG_MEMORY_MAGIC;
   
   LIST_ADDTAIL(&hdr->head, &list);
   
   return data_from_header(hdr);
}

void
debug_free(const char *file, unsigned line, const char *function,
           void *ptr) 
{
   struct debug_memory_header *hdr;
   struct debug_memory_footer *ftr;
   
   if(!ptr)
      return;
   
   hdr = header_from_data(ptr);
   if(hdr->magic != DEBUG_MEMORY_MAGIC) {
      debug_printf("%s:%u:%s: freeing bad or corrupted memory %p\n",
                   file, line, function,
                   ptr);
      debug_assert(0);
      return;
   }

   ftr = footer_from_header(hdr);
   if(ftr->magic != DEBUG_MEMORY_MAGIC) {
      debug_printf("%s:%u:%s: buffer overflow %p\n",
                   hdr->file, hdr->line, hdr->function,
                   ptr);
      debug_assert(0);
   }

   LIST_DEL(&hdr->head);
   hdr->magic = 0;
   ftr->magic = 0;
   
   real_free(hdr);
}

void *
debug_calloc(const char *file, unsigned line, const char *function,
             size_t count, size_t size )
{
   void *ptr = debug_malloc( file, line, function, count * size );
   if( ptr )
      memset( ptr, 0, count * size );
   return ptr;
}

void *
debug_realloc(const char *file, unsigned line, const char *function,
              void *old_ptr, size_t old_size, size_t new_size )
{
   struct debug_memory_header *old_hdr, *new_hdr;
   struct debug_memory_footer *old_ftr, *new_ftr;
   void *new_ptr;
   
   if(!old_ptr)
      return debug_malloc( file, line, function, new_size );
   
   if(!new_size) {
      debug_free( file, line, function, old_ptr );
      return NULL;
   }
   
   old_hdr = header_from_data(old_ptr);
   if(old_hdr->magic != DEBUG_MEMORY_MAGIC) {
      debug_printf("%s:%u:%s: reallocating bad or corrupted memory %p\n",
                   file, line, function,
                   old_ptr);
      debug_assert(0);
      return NULL;
   }
   
   old_ftr = footer_from_header(old_hdr);
   if(old_ftr->magic != DEBUG_MEMORY_MAGIC) {
      debug_printf("%s:%u:%s: buffer overflow %p\n",
                   old_hdr->file, old_hdr->line, old_hdr->function,
                   old_ptr);
      debug_assert(0);
   }

   /* alloc new */
   new_hdr = real_malloc(sizeof(*new_hdr) + new_size + sizeof(*new_ftr));
   if(!new_hdr) {
      debug_printf("%s:%u:%s: out of memory when trying to allocate %lu bytes\n",
                   file, line, function,
                   (long unsigned)new_size);
      return NULL;
   }
   new_hdr->no = old_hdr->no;
   new_hdr->file = old_hdr->file;
   new_hdr->line = old_hdr->line;
   new_hdr->function = old_hdr->function;
   new_hdr->size = new_size;
   new_hdr->magic = DEBUG_MEMORY_MAGIC;
   
   new_ftr = footer_from_header(new_hdr);
   new_ftr->magic = DEBUG_MEMORY_MAGIC;
   
   LIST_REPLACE(&old_hdr->head, &new_hdr->head);

   /* copy data */
   new_ptr = data_from_header(new_hdr);
   memcpy( new_ptr, old_ptr, old_size < new_size ? old_size : new_size );

   /* free old */
   old_hdr->magic = 0;
   old_ftr->magic = 0;
   real_free(old_hdr);

   return new_ptr;
}

unsigned long
debug_memory_begin(void)
{
   return last_no;
}

void 
debug_memory_end(unsigned long start_no)
{
   size_t total_size = 0;
   struct list_head *entry;

   entry = list.prev;
   for (; entry != &list; entry = entry->prev) {
      struct debug_memory_header *hdr;
      void *ptr;
      struct debug_memory_footer *ftr;

      hdr = LIST_ENTRY(struct debug_memory_header, entry, head);
      ptr = data_from_header(hdr);
      ftr = footer_from_header(hdr);

      if(hdr->magic != DEBUG_MEMORY_MAGIC) {
         debug_printf("%s:%u:%s: bad or corrupted memory %p\n",
                      hdr->file, hdr->line, hdr->function,
                      ptr);
         debug_assert(0);
      }

      if((start_no <= hdr->no && hdr->no < last_no) ||
	 (last_no < start_no && (hdr->no < last_no || start_no <= hdr->no))) {
	 debug_printf("%s:%u:%s: %u bytes at %p not freed\n",
		      hdr->file, hdr->line, hdr->function,
		      hdr->size, ptr);
	 total_size += hdr->size;
      }

      if(ftr->magic != DEBUG_MEMORY_MAGIC) {
         debug_printf("%s:%u:%s: buffer overflow %p\n",
                      hdr->file, hdr->line, hdr->function,
                      ptr);
         debug_assert(0);
      }
   }

   if(total_size) {
      debug_printf("Total of %u KB of system memory apparently leaked\n",
		   (total_size + 1023)/1024);
   }
}