1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ***************************************************************************/
23 #include "curl_setup.h"
27 #include <curl/curl.h>
29 #define _MPRINTF_REPLACE
30 #include <curl/mprintf.h>
31 #include "curl_urldata.h"
33 #define MEMDEBUG_NODEFINES /* don't redefine the standard functions */
34 #include "curl_memory.h"
35 #include "curl_memdebug.h"
38 # define assert(x) Curl_nop_stmt
42 * Until 2011-08-17 libcurl's Memory Tracking feature also performed
43 * automatic malloc and free filling operations using 0xA5 and 0x13
44 * values. Our own preinitialization of dynamically allocated memory
45 * might be useful when not using third party memory debuggers, but
46 * on the other hand this would fool memory debuggers into thinking
47 * that all dynamically allocated memory is properly initialized.
49 * As a default setting, libcurl's Memory Tracking feature no longer
50 * performs preinitialization of dynamically allocated memory on its
51 * own. If you know what you are doing, and really want to retain old
52 * behavior, you can achieve this compiling with preprocessor symbols
53 * CURL_MT_MALLOC_FILL and CURL_MT_FREE_FILL defined with appropriate
57 #ifdef CURL_MT_MALLOC_FILL
58 # if (CURL_MT_MALLOC_FILL < 0) || (CURL_MT_MALLOC_FILL > 0xff)
59 # error "invalid CURL_MT_MALLOC_FILL or out of range"
63 #ifdef CURL_MT_FREE_FILL
64 # if (CURL_MT_FREE_FILL < 0) || (CURL_MT_FREE_FILL > 0xff)
65 # error "invalid CURL_MT_FREE_FILL or out of range"
69 #if defined(CURL_MT_MALLOC_FILL) && defined(CURL_MT_FREE_FILL)
70 # if (CURL_MT_MALLOC_FILL == CURL_MT_FREE_FILL)
71 # error "CURL_MT_MALLOC_FILL same as CURL_MT_FREE_FILL"
75 #ifdef CURL_MT_MALLOC_FILL
76 # define mt_malloc_fill(buf,len) memset((buf), CURL_MT_MALLOC_FILL, (len))
78 # define mt_malloc_fill(buf,len) Curl_nop_stmt
81 #ifdef CURL_MT_FREE_FILL
82 # define mt_free_fill(buf,len) memset((buf), CURL_MT_FREE_FILL, (len))
84 # define mt_free_fill(buf,len) Curl_nop_stmt
94 /* I'm hoping this is the thing with the strictest alignment
95 * requirements. That also means we waste some space :-( */
99 * Note that these debug functions are very simple and they are meant to
100 * remain so. For advanced analysis, record a log file and write perl scripts
103 * Don't use these with multithreaded test programs!
106 #define logfile curl_debuglogfile
107 FILE *curl_debuglogfile = NULL;
108 static bool memlimit = FALSE; /* enable memory limit */
109 static long memsize = 0; /* set number of mallocs allowed */
111 /* this sets the log file name */
112 void curl_memdebug(const char *logname)
115 if(logname && *logname)
116 logfile = fopen(logname, "w");
119 #ifdef MEMDEBUG_LOG_SYNC
120 /* Flush the log file after every line so the log isn't lost in a crash */
121 setvbuf(logfile, (char *)NULL, _IOLBF, 0);
126 /* This function sets the number of malloc() calls that should return
128 void curl_memlimit(long limit)
136 /* returns TRUE if this isn't allowed! */
137 static bool countcheck(const char *func, int line, const char *source)
139 /* if source is NULL, then the call is made internally and this check
140 should not be made */
141 if(memlimit && source) {
145 curl_memlog("LIMIT %s:%d %s reached memlimit\n",
147 /* log to stderr also */
148 fprintf(stderr, "LIMIT %s:%d %s reached memlimit\n",
152 return TRUE; /* RETURN ERROR! */
155 memsize--; /* countdown */
157 /* log the countdown */
159 curl_memlog("LIMIT %s:%d %ld ALLOCS left\n",
160 source, line, memsize);
164 return FALSE; /* allow this */
167 void *curl_domalloc(size_t wantedsize, int line, const char *source)
169 struct memdebug *mem;
172 assert(wantedsize != 0);
174 if(countcheck("malloc", line, source))
177 /* alloc at least 64 bytes */
178 size = sizeof(struct memdebug)+wantedsize;
180 mem = (Curl_cmalloc)(size);
182 /* fill memory with junk */
183 mt_malloc_fill(mem->mem, wantedsize);
184 mem->size = wantedsize;
188 curl_memlog("MEM %s:%d malloc(%zd) = %p\n",
189 source, line, wantedsize, mem ? mem->mem : 0);
190 return (mem ? mem->mem : NULL);
193 void *curl_docalloc(size_t wanted_elements, size_t wanted_size,
194 int line, const char *source)
196 struct memdebug *mem;
197 size_t size, user_size;
199 assert(wanted_elements != 0);
200 assert(wanted_size != 0);
202 if(countcheck("calloc", line, source))
205 /* alloc at least 64 bytes */
206 user_size = wanted_size * wanted_elements;
207 size = sizeof(struct memdebug) + user_size;
209 mem = (Curl_ccalloc)(1, size);
211 mem->size = user_size;
214 curl_memlog("MEM %s:%d calloc(%zu,%zu) = %p\n",
215 source, line, wanted_elements, wanted_size, mem?mem->mem:0);
216 return (mem ? mem->mem : NULL);
219 char *curl_dostrdup(const char *str, int line, const char *source)
226 if(countcheck("strdup", line, source))
231 mem=curl_domalloc(len, 0, NULL); /* NULL prevents logging */
233 memcpy(mem, str, len);
236 curl_memlog("MEM %s:%d strdup(%p) (%zu) = %p\n",
237 source, line, str, len, mem);
242 /* We provide a realloc() that accepts a NULL as pointer, which then
243 performs a malloc(). In order to work with ares. */
244 void *curl_dorealloc(void *ptr, size_t wantedsize,
245 int line, const char *source)
247 struct memdebug *mem=NULL;
249 size_t size = sizeof(struct memdebug)+wantedsize;
251 assert(wantedsize != 0);
253 if(countcheck("realloc", line, source))
256 #ifdef __INTEL_COMPILER
257 # pragma warning(push)
258 # pragma warning(disable:1684)
259 /* 1684: conversion from pointer to same-sized integral type */
263 mem = (void *)((char *)ptr - offsetof(struct memdebug, mem));
265 #ifdef __INTEL_COMPILER
266 # pragma warning(pop)
269 mem = (Curl_crealloc)(mem, size);
271 curl_memlog("MEM %s:%d realloc(%p, %zu) = %p\n",
272 source, line, ptr, wantedsize, mem?mem->mem:NULL);
275 mem->size = wantedsize;
282 void curl_dofree(void *ptr, int line, const char *source)
284 struct memdebug *mem;
288 #ifdef __INTEL_COMPILER
289 # pragma warning(push)
290 # pragma warning(disable:1684)
291 /* 1684: conversion from pointer to same-sized integral type */
294 mem = (void *)((char *)ptr - offsetof(struct memdebug, mem));
296 #ifdef __INTEL_COMPILER
297 # pragma warning(pop)
301 mt_free_fill(mem->mem, mem->size);
307 curl_memlog("MEM %s:%d free(%p)\n", source, line, ptr);
310 curl_socket_t curl_socket(int domain, int type, int protocol,
311 int line, const char *source)
313 const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
314 "FD %s:%d socket() = %d\n" :
315 (sizeof(curl_socket_t) == sizeof(long)) ?
316 "FD %s:%d socket() = %ld\n" :
317 "FD %s:%d socket() = %zd\n" ;
319 curl_socket_t sockfd = socket(domain, type, protocol);
320 if(source && (sockfd != CURL_SOCKET_BAD))
321 curl_memlog(fmt, source, line, sockfd);
325 #ifdef HAVE_SOCKETPAIR
326 int curl_socketpair(int domain, int type, int protocol,
327 curl_socket_t socket_vector[2],
328 int line, const char *source)
330 const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
331 "FD %s:%d socketpair() = %d %d\n" :
332 (sizeof(curl_socket_t) == sizeof(long)) ?
333 "FD %s:%d socketpair() = %ld %ld\n" :
334 "FD %s:%d socketpair() = %zd %zd\n" ;
336 int res = socketpair(domain, type, protocol, socket_vector);
337 if(source && (0 == res))
338 curl_memlog(fmt, source, line, socket_vector[0], socket_vector[1]);
343 curl_socket_t curl_accept(curl_socket_t s, void *saddr, void *saddrlen,
344 int line, const char *source)
346 const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
347 "FD %s:%d accept() = %d\n" :
348 (sizeof(curl_socket_t) == sizeof(long)) ?
349 "FD %s:%d accept() = %ld\n" :
350 "FD %s:%d accept() = %zd\n" ;
352 struct sockaddr *addr = (struct sockaddr *)saddr;
353 curl_socklen_t *addrlen = (curl_socklen_t *)saddrlen;
354 curl_socket_t sockfd = accept(s, addr, addrlen);
355 if(source && (sockfd != CURL_SOCKET_BAD))
356 curl_memlog(fmt, source, line, sockfd);
360 /* separate function to allow libcurl to mark a "faked" close */
361 void curl_mark_sclose(curl_socket_t sockfd, int line, const char *source)
363 const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
364 "FD %s:%d sclose(%d)\n" :
365 (sizeof(curl_socket_t) == sizeof(long)) ?
366 "FD %s:%d sclose(%ld)\n" :
367 "FD %s:%d sclose(%zd)\n" ;
370 curl_memlog(fmt, source, line, sockfd);
373 /* this is our own defined way to close sockets on *ALL* platforms */
374 int curl_sclose(curl_socket_t sockfd, int line, const char *source)
376 int res=sclose(sockfd);
377 curl_mark_sclose(sockfd, line, source);
381 FILE *curl_fopen(const char *file, const char *mode,
382 int line, const char *source)
384 FILE *res=fopen(file, mode);
386 curl_memlog("FILE %s:%d fopen(\"%s\",\"%s\") = %p\n",
387 source, line, file, mode, res);
392 FILE *curl_fdopen(int filedes, const char *mode,
393 int line, const char *source)
395 FILE *res=fdopen(filedes, mode);
397 curl_memlog("FILE %s:%d fdopen(\"%d\",\"%s\") = %p\n",
398 source, line, filedes, mode, res);
403 int curl_fclose(FILE *file, int line, const char *source)
407 assert(file != NULL);
411 curl_memlog("FILE %s:%d fclose(%p)\n",
416 #define LOGLINE_BUFSIZE 1024
418 /* this does the writting to the memory tracking log file */
419 void curl_memlog(const char *format, ...)
428 buf = (Curl_cmalloc)(LOGLINE_BUFSIZE);
432 va_start(ap, format);
433 nchars = vsnprintf(buf, LOGLINE_BUFSIZE, format, ap);
436 if(nchars > LOGLINE_BUFSIZE - 1)
437 nchars = LOGLINE_BUFSIZE - 1;
440 fwrite(buf, 1, nchars, logfile);
445 #endif /* CURLDEBUG */