source: UsbWattMeter/trunk/curl-7.47.1/lib/memdebug.c@ 164

Last change on this file since 164 was 164, checked in by coas-nagasima, 6 years ago

TOPPERS/ECNLサンプルアプリ「USB充電器電力計」を追加

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1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
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 https://curl.haxx.se/docs/copyright.html.
13 *
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.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22
23#include "curl_setup.h"
24
25#ifdef CURLDEBUG
26
27#include <curl/curl.h>
28
29#include "curl_printf.h"
30#include "urldata.h"
31
32#define MEMDEBUG_NODEFINES /* don't redefine the standard functions */
33#include "curl_memory.h"
34#include "memdebug.h"
35
36#ifndef HAVE_ASSERT_H
37# define assert(x) Curl_nop_stmt
38#endif
39
40/*
41 * Until 2011-08-17 libcurl's Memory Tracking feature also performed
42 * automatic malloc and free filling operations using 0xA5 and 0x13
43 * values. Our own preinitialization of dynamically allocated memory
44 * might be useful when not using third party memory debuggers, but
45 * on the other hand this would fool memory debuggers into thinking
46 * that all dynamically allocated memory is properly initialized.
47 *
48 * As a default setting, libcurl's Memory Tracking feature no longer
49 * performs preinitialization of dynamically allocated memory on its
50 * own. If you know what you are doing, and really want to retain old
51 * behavior, you can achieve this compiling with preprocessor symbols
52 * CURL_MT_MALLOC_FILL and CURL_MT_FREE_FILL defined with appropriate
53 * values.
54 */
55
56#ifdef CURL_MT_MALLOC_FILL
57# if (CURL_MT_MALLOC_FILL < 0) || (CURL_MT_MALLOC_FILL > 0xff)
58# error "invalid CURL_MT_MALLOC_FILL or out of range"
59# endif
60#endif
61
62#ifdef CURL_MT_FREE_FILL
63# if (CURL_MT_FREE_FILL < 0) || (CURL_MT_FREE_FILL > 0xff)
64# error "invalid CURL_MT_FREE_FILL or out of range"
65# endif
66#endif
67
68#if defined(CURL_MT_MALLOC_FILL) && defined(CURL_MT_FREE_FILL)
69# if (CURL_MT_MALLOC_FILL == CURL_MT_FREE_FILL)
70# error "CURL_MT_MALLOC_FILL same as CURL_MT_FREE_FILL"
71# endif
72#endif
73
74#ifdef CURL_MT_MALLOC_FILL
75# define mt_malloc_fill(buf,len) memset((buf), CURL_MT_MALLOC_FILL, (len))
76#else
77# define mt_malloc_fill(buf,len) Curl_nop_stmt
78#endif
79
80#ifdef CURL_MT_FREE_FILL
81# define mt_free_fill(buf,len) memset((buf), CURL_MT_FREE_FILL, (len))
82#else
83# define mt_free_fill(buf,len) Curl_nop_stmt
84#endif
85
86struct memdebug {
87 size_t size;
88 union {
89 curl_off_t o;
90 double d;
91 void * p;
92 } mem[1];
93 /* I'm hoping this is the thing with the strictest alignment
94 * requirements. That also means we waste some space :-( */
95};
96
97/*
98 * Note that these debug functions are very simple and they are meant to
99 * remain so. For advanced analysis, record a log file and write perl scripts
100 * to analyze them!
101 *
102 * Don't use these with multithreaded test programs!
103 */
104
105#define logfile curl_debuglogfile
106FILE *curl_debuglogfile = NULL;
107static bool memlimit = FALSE; /* enable memory limit */
108static long memsize = 0; /* set number of mallocs allowed */
109
110/* this sets the log file name */
111void curl_memdebug(const char *logname)
112{
113 if(!logfile) {
114 if(logname && *logname)
115 logfile = fopen(logname, FOPEN_WRITETEXT);
116 else
117 logfile = stderr;
118#ifdef MEMDEBUG_LOG_SYNC
119 /* Flush the log file after every line so the log isn't lost in a crash */
120 setvbuf(logfile, (char *)NULL, _IOLBF, 0);
121#endif
122 }
123}
124
125/* This function sets the number of malloc() calls that should return
126 successfully! */
127void curl_memlimit(long limit)
128{
129 if(!memlimit) {
130 memlimit = TRUE;
131 memsize = limit;
132 }
133}
134
135/* returns TRUE if this isn't allowed! */
136static bool countcheck(const char *func, int line, const char *source)
137{
138 /* if source is NULL, then the call is made internally and this check
139 should not be made */
140 if(memlimit && source) {
141 if(!memsize) {
142 if(source) {
143 /* log to file */
144 curl_memlog("LIMIT %s:%d %s reached memlimit\n",
145 source, line, func);
146 /* log to stderr also */
147 fprintf(stderr, "LIMIT %s:%d %s reached memlimit\n",
148 source, line, func);
149 }
150 SET_ERRNO(ENOMEM);
151 return TRUE; /* RETURN ERROR! */
152 }
153 else
154 memsize--; /* countdown */
155
156 /* log the countdown */
157 if(source)
158 curl_memlog("LIMIT %s:%d %ld ALLOCS left\n",
159 source, line, memsize);
160
161 }
162
163 return FALSE; /* allow this */
164}
165
166void *curl_domalloc(size_t wantedsize, int line, const char *source)
167{
168 struct memdebug *mem;
169 size_t size;
170
171 assert(wantedsize != 0);
172
173 if(countcheck("malloc", line, source))
174 return NULL;
175
176 /* alloc at least 64 bytes */
177 size = sizeof(struct memdebug)+wantedsize;
178
179 mem = (Curl_cmalloc)(size);
180 if(mem) {
181 /* fill memory with junk */
182 mt_malloc_fill(mem->mem, wantedsize);
183 mem->size = wantedsize;
184 }
185
186 if(source)
187 curl_memlog("MEM %s:%d malloc(%zu) = %p\n",
188 source, line, wantedsize,
189 mem ? (void *)mem->mem : (void *)0);
190
191 return (mem ? mem->mem : NULL);
192}
193
194void *curl_docalloc(size_t wanted_elements, size_t wanted_size,
195 int line, const char *source)
196{
197 struct memdebug *mem;
198 size_t size, user_size;
199
200 assert(wanted_elements != 0);
201 assert(wanted_size != 0);
202
203 if(countcheck("calloc", line, source))
204 return NULL;
205
206 /* alloc at least 64 bytes */
207 user_size = wanted_size * wanted_elements;
208 size = sizeof(struct memdebug) + user_size;
209
210 mem = (Curl_ccalloc)(1, size);
211 if(mem)
212 mem->size = user_size;
213
214 if(source)
215 curl_memlog("MEM %s:%d calloc(%zu,%zu) = %p\n",
216 source, line, wanted_elements, wanted_size,
217 mem ? (void *)mem->mem : (void *)0);
218
219 return (mem ? mem->mem : NULL);
220}
221
222char *curl_dostrdup(const char *str, int line, const char *source)
223{
224 char *mem;
225 size_t len;
226
227 assert(str != NULL);
228
229 if(countcheck("strdup", line, source))
230 return NULL;
231
232 len=strlen(str)+1;
233
234 mem=curl_domalloc(len, 0, NULL); /* NULL prevents logging */
235 if(mem)
236 memcpy(mem, str, len);
237
238 if(source)
239 curl_memlog("MEM %s:%d strdup(%p) (%zu) = %p\n",
240 source, line, (void *)str, len, (void *)mem);
241
242 return mem;
243}
244
245#if defined(WIN32) && defined(UNICODE)
246wchar_t *curl_dowcsdup(const wchar_t *str, int line, const char *source)
247{
248 wchar_t *mem;
249 size_t wsiz, bsiz;
250
251 assert(str != NULL);
252
253 if(countcheck("wcsdup", line, source))
254 return NULL;
255
256 wsiz = wcslen(str) + 1;
257 bsiz = wsiz * sizeof(wchar_t);
258
259 mem = curl_domalloc(bsiz, 0, NULL); /* NULL prevents logging */
260 if(mem)
261 memcpy(mem, str, bsiz);
262
263 if(source)
264 curl_memlog("MEM %s:%d wcsdup(%p) (%zu) = %p\n",
265 source, line, (void *)str, bsiz, (void *)mem);
266
267 return mem;
268}
269#endif
270
271/* We provide a realloc() that accepts a NULL as pointer, which then
272 performs a malloc(). In order to work with ares. */
273void *curl_dorealloc(void *ptr, size_t wantedsize,
274 int line, const char *source)
275{
276 struct memdebug *mem=NULL;
277
278 size_t size = sizeof(struct memdebug)+wantedsize;
279
280 assert(wantedsize != 0);
281
282 if(countcheck("realloc", line, source))
283 return NULL;
284
285#ifdef __INTEL_COMPILER
286# pragma warning(push)
287# pragma warning(disable:1684)
288 /* 1684: conversion from pointer to same-sized integral type */
289#endif
290
291 if(ptr)
292 mem = (void *)((char *)ptr - offsetof(struct memdebug, mem));
293
294#ifdef __INTEL_COMPILER
295# pragma warning(pop)
296#endif
297
298 mem = (Curl_crealloc)(mem, size);
299 if(source)
300 curl_memlog("MEM %s:%d realloc(%p, %zu) = %p\n",
301 source, line, (void *)ptr, wantedsize,
302 mem ? (void *)mem->mem : (void *)0);
303
304 if(mem) {
305 mem->size = wantedsize;
306 return mem->mem;
307 }
308
309 return NULL;
310}
311
312void curl_dofree(void *ptr, int line, const char *source)
313{
314 struct memdebug *mem;
315
316 if(ptr) {
317
318#ifdef __INTEL_COMPILER
319# pragma warning(push)
320# pragma warning(disable:1684)
321 /* 1684: conversion from pointer to same-sized integral type */
322#endif
323
324 mem = (void *)((char *)ptr - offsetof(struct memdebug, mem));
325
326#ifdef __INTEL_COMPILER
327# pragma warning(pop)
328#endif
329
330 /* destroy */
331 mt_free_fill(mem->mem, mem->size);
332
333 /* free for real */
334 (Curl_cfree)(mem);
335 }
336
337 if(source)
338 curl_memlog("MEM %s:%d free(%p)\n", source, line, (void *)ptr);
339}
340
341curl_socket_t curl_socket(int domain, int type, int protocol,
342 int line, const char *source)
343{
344 const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
345 "FD %s:%d socket() = %d\n" :
346 (sizeof(curl_socket_t) == sizeof(long)) ?
347 "FD %s:%d socket() = %ld\n" :
348 "FD %s:%d socket() = %zd\n";
349
350 curl_socket_t sockfd = socket(domain, type, protocol);
351
352 if(source && (sockfd != CURL_SOCKET_BAD))
353 curl_memlog(fmt, source, line, sockfd);
354
355 return sockfd;
356}
357
358#ifdef HAVE_SOCKETPAIR
359int curl_socketpair(int domain, int type, int protocol,
360 curl_socket_t socket_vector[2],
361 int line, const char *source)
362{
363 const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
364 "FD %s:%d socketpair() = %d %d\n" :
365 (sizeof(curl_socket_t) == sizeof(long)) ?
366 "FD %s:%d socketpair() = %ld %ld\n" :
367 "FD %s:%d socketpair() = %zd %zd\n";
368
369 int res = socketpair(domain, type, protocol, socket_vector);
370
371 if(source && (0 == res))
372 curl_memlog(fmt, source, line, socket_vector[0], socket_vector[1]);
373
374 return res;
375}
376#endif
377
378curl_socket_t curl_accept(curl_socket_t s, void *saddr, void *saddrlen,
379 int line, const char *source)
380{
381 const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
382 "FD %s:%d accept() = %d\n" :
383 (sizeof(curl_socket_t) == sizeof(long)) ?
384 "FD %s:%d accept() = %ld\n" :
385 "FD %s:%d accept() = %zd\n";
386
387 struct sockaddr *addr = (struct sockaddr *)saddr;
388 curl_socklen_t *addrlen = (curl_socklen_t *)saddrlen;
389
390 curl_socket_t sockfd = accept(s, addr, addrlen);
391
392 if(source && (sockfd != CURL_SOCKET_BAD))
393 curl_memlog(fmt, source, line, sockfd);
394
395 return sockfd;
396}
397
398/* separate function to allow libcurl to mark a "faked" close */
399void curl_mark_sclose(curl_socket_t sockfd, int line, const char *source)
400{
401 const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
402 "FD %s:%d sclose(%d)\n":
403 (sizeof(curl_socket_t) == sizeof(long)) ?
404 "FD %s:%d sclose(%ld)\n":
405 "FD %s:%d sclose(%zd)\n";
406
407 if(source)
408 curl_memlog(fmt, source, line, sockfd);
409}
410
411/* this is our own defined way to close sockets on *ALL* platforms */
412int curl_sclose(curl_socket_t sockfd, int line, const char *source)
413{
414 int res=sclose(sockfd);
415 curl_mark_sclose(sockfd, line, source);
416 return res;
417}
418
419FILE *curl_fopen(const char *file, const char *mode,
420 int line, const char *source)
421{
422 FILE *res=fopen(file, mode);
423
424 if(source)
425 curl_memlog("FILE %s:%d fopen(\"%s\",\"%s\") = %p\n",
426 source, line, file, mode, (void *)res);
427
428 return res;
429}
430
431#ifdef HAVE_FDOPEN
432FILE *curl_fdopen(int filedes, const char *mode,
433 int line, const char *source)
434{
435 FILE *res=fdopen(filedes, mode);
436
437 if(source)
438 curl_memlog("FILE %s:%d fdopen(\"%d\",\"%s\") = %p\n",
439 source, line, filedes, mode, (void *)res);
440
441 return res;
442}
443#endif
444
445int curl_fclose(FILE *file, int line, const char *source)
446{
447 int res;
448
449 assert(file != NULL);
450
451 res=fclose(file);
452
453 if(source)
454 curl_memlog("FILE %s:%d fclose(%p)\n",
455 source, line, (void *)file);
456
457 return res;
458}
459
460#define LOGLINE_BUFSIZE 1024
461
462/* this does the writting to the memory tracking log file */
463void curl_memlog(const char *format, ...)
464{
465 char *buf;
466 int nchars;
467 va_list ap;
468
469 if(!logfile)
470 return;
471
472 buf = (Curl_cmalloc)(LOGLINE_BUFSIZE);
473 if(!buf)
474 return;
475
476 va_start(ap, format);
477 nchars = vsnprintf(buf, LOGLINE_BUFSIZE, format, ap);
478 va_end(ap);
479
480 if(nchars > LOGLINE_BUFSIZE - 1)
481 nchars = LOGLINE_BUFSIZE - 1;
482
483 if(nchars > 0)
484 fwrite(buf, 1, nchars, logfile);
485
486 (Curl_cfree)(buf);
487}
488
489#endif /* CURLDEBUG */
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