2 /***************************************************************************
4 * Project ___| | | | _ \| |
6 * | (__| |_| | _ <| |___
7 * \___|\___/|_| \_\_____|
9 * Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
11 * This software is licensed as described in the file COPYING, which
12 * you should have received as part of this distribution. The terms
13 * are also available at http://curl.haxx.se/docs/copyright.html.
15 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
16 * copies of the Software, and permit persons to whom the Software is
17 * furnished to do so, under the terms of the COPYING file.
19 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
20 * KIND, either express or implied.
22 * $Id: memdebug.c,v 1.41 2004/03/08 11:33:49 bagder Exp $
23 ***************************************************************************/
27 #include <curl/curl.h>
29 #ifdef HAVE_SYS_SOCKET_H
30 #include <sys/socket.h>
33 #define _MPRINTF_REPLACE
34 #include <curl/mprintf.h>
44 #define MEMDEBUG_NODEFINES /* don't redefine the standard functions */
50 /* I'm hoping this is the thing with the strictest alignment
51 * requirements. That also means we waste some space :-( */
55 * Note that these debug functions are very simple and they are meant to
56 * remain so. For advanced analysis, record a log file and write perl scripts
59 * Don't use these with multithreaded test programs!
62 #define logfile curl_debuglogfile
63 FILE *curl_debuglogfile;
64 static bool memlimit; /* enable memory limit */
65 static long memsize; /* set number of mallocs allowed */
67 /* this sets the log file name */
68 void curl_memdebug(const char *logname)
71 logfile = fopen(logname, "w");
76 /* This function sets the number of malloc() calls that should return
78 void curl_memlimit(long limit)
84 /* returns TRUE if this isn't allowed! */
85 static bool countcheck(const char *func, int line, const char *source)
87 /* if source is NULL, then the call is made internally and this check
89 if(memlimit && source) {
92 fprintf(logfile, "LIMIT %s:%d %s reached memlimit\n",
94 return TRUE; /* RETURN ERROR! */
97 memsize--; /* countdown */
99 /* log the countdown */
100 if(logfile && source)
101 fprintf(logfile, "LIMIT %s:%d %ld ALLOCS left\n",
102 source, line, memsize);
106 return FALSE; /* allow this */
109 void *curl_domalloc(size_t wantedsize, int line, const char *source)
111 struct memdebug *mem;
114 if(countcheck("malloc", line, source))
117 /* alloc at least 64 bytes */
118 size = sizeof(struct memdebug)+wantedsize;
120 mem=(struct memdebug *)(malloc)(size);
122 /* fill memory with junk */
123 memset(mem->mem, 0xA5, wantedsize);
124 mem->size = wantedsize;
127 if(logfile && source)
128 fprintf(logfile, "MEM %s:%d malloc(%zd) = %p\n",
129 source, line, wantedsize, mem->mem);
133 void *curl_docalloc(size_t wanted_elements, size_t wanted_size,
134 int line, const char *source)
136 struct memdebug *mem;
137 size_t size, user_size;
139 if(countcheck("calloc", line, source))
142 /* alloc at least 64 bytes */
143 user_size = wanted_size * wanted_elements;
144 size = sizeof(struct memdebug) + user_size;
146 mem = (struct memdebug *)(malloc)(size);
148 /* fill memory with zeroes */
149 memset(mem->mem, 0, user_size);
150 mem->size = user_size;
153 if(logfile && source)
154 fprintf(logfile, "MEM %s:%d calloc(%u,%u) = %p\n",
155 source, line, wanted_elements, wanted_size, mem->mem);
159 char *curl_dostrdup(const char *str, int line, const char *source)
164 curlassert(str != NULL);
166 if(countcheck("strdup", line, source))
171 mem=curl_domalloc(len, 0, NULL); /* NULL prevents logging */
172 memcpy(mem, str, len);
175 fprintf(logfile, "MEM %s:%d strdup(%p) (%zd) = %p\n",
176 source, line, str, len, mem);
181 /* We provide a realloc() that accepts a NULL as pointer, which then
182 performs a malloc(). In order to work with ares. */
183 void *curl_dorealloc(void *ptr, size_t wantedsize,
184 int line, const char *source)
186 struct memdebug *mem=NULL;
188 size_t size = sizeof(struct memdebug)+wantedsize;
190 if(countcheck("realloc", line, source))
194 mem = (struct memdebug *)((char *)ptr - offsetof(struct memdebug, mem));
196 mem=(struct memdebug *)(realloc)(mem, size);
198 fprintf(logfile, "MEM %s:%d realloc(0x%x, %zd) = %p\n",
199 source, line, ptr, wantedsize, mem?mem->mem:NULL);
202 mem->size = wantedsize;
209 void curl_dofree(void *ptr, int line, const char *source)
211 struct memdebug *mem;
213 curlassert(ptr != NULL);
215 mem = (struct memdebug *)((char *)ptr - offsetof(struct memdebug, mem));
218 memset(mem->mem, 0x13, mem->size);
224 fprintf(logfile, "MEM %s:%d free(%p)\n", source, line, ptr);
227 int curl_socket(int domain, int type, int protocol, int line,
230 int sockfd=(socket)(domain, type, protocol);
231 if(logfile && (sockfd!=-1))
232 fprintf(logfile, "FD %s:%d socket() = %d\n",
233 source, line, sockfd);
237 int curl_accept(int s, void *saddr, void *saddrlen,
238 int line, const char *source)
240 struct sockaddr *addr = (struct sockaddr *)saddr;
241 socklen_t *addrlen = (socklen_t *)saddrlen;
242 int sockfd=(accept)(s, addr, addrlen);
244 fprintf(logfile, "FD %s:%d accept() = %d\n",
245 source, line, sockfd);
249 /* this is our own defined way to close sockets on *ALL* platforms */
250 int curl_sclose(int sockfd, int line, const char *source)
252 int res=sclose(sockfd);
254 fprintf(logfile, "FD %s:%d sclose(%d)\n",
255 source, line, sockfd);
259 FILE *curl_fopen(const char *file, const char *mode,
260 int line, const char *source)
262 FILE *res=(fopen)(file, mode);
264 fprintf(logfile, "FILE %s:%d fopen(\"%s\",\"%s\") = %p\n",
265 source, line, file, mode, res);
269 int curl_fclose(FILE *file, int line, const char *source)
273 curlassert(file != NULL);
277 fprintf(logfile, "FILE %s:%d fclose(%p)\n",
283 int VOID_VAR_MEMDEBUG;
285 /* we provide a fake do-nothing function here to avoid compiler warnings */
286 void curl_memdebug(void) {}
288 #endif /* CURLDEBUG */