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490 lines
12 KiB
490 lines
12 KiB
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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#ifdef CURLDEBUG
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#include <curl/curl.h>
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#include "curl_printf.h"
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#include "urldata.h"
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#define MEMDEBUG_NODEFINES /* don't redefine the standard functions */
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#include "curl_memory.h"
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#include "memdebug.h"
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#ifndef HAVE_ASSERT_H
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# define assert(x) Curl_nop_stmt
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#endif
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/*
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* Until 2011-08-17 libcurl's Memory Tracking feature also performed
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* automatic malloc and free filling operations using 0xA5 and 0x13
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* values. Our own preinitialization of dynamically allocated memory
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* might be useful when not using third party memory debuggers, but
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* on the other hand this would fool memory debuggers into thinking
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* that all dynamically allocated memory is properly initialized.
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*
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* As a default setting, libcurl's Memory Tracking feature no longer
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* performs preinitialization of dynamically allocated memory on its
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* own. If you know what you are doing, and really want to retain old
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* behavior, you can achieve this compiling with preprocessor symbols
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* CURL_MT_MALLOC_FILL and CURL_MT_FREE_FILL defined with appropriate
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* values.
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*/
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#ifdef CURL_MT_MALLOC_FILL
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# if (CURL_MT_MALLOC_FILL < 0) || (CURL_MT_MALLOC_FILL > 0xff)
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# error "invalid CURL_MT_MALLOC_FILL or out of range"
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# endif
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#endif
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#ifdef CURL_MT_FREE_FILL
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# if (CURL_MT_FREE_FILL < 0) || (CURL_MT_FREE_FILL > 0xff)
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# error "invalid CURL_MT_FREE_FILL or out of range"
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# endif
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#endif
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#if defined(CURL_MT_MALLOC_FILL) && defined(CURL_MT_FREE_FILL)
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# if (CURL_MT_MALLOC_FILL == CURL_MT_FREE_FILL)
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# error "CURL_MT_MALLOC_FILL same as CURL_MT_FREE_FILL"
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# endif
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#endif
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#ifdef CURL_MT_MALLOC_FILL
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# define mt_malloc_fill(buf,len) memset((buf), CURL_MT_MALLOC_FILL, (len))
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#else
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# define mt_malloc_fill(buf,len) Curl_nop_stmt
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#endif
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#ifdef CURL_MT_FREE_FILL
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# define mt_free_fill(buf,len) memset((buf), CURL_MT_FREE_FILL, (len))
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#else
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# define mt_free_fill(buf,len) Curl_nop_stmt
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#endif
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struct memdebug {
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size_t size;
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union {
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curl_off_t o;
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double d;
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void * p;
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} mem[1];
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/* I'm hoping this is the thing with the strictest alignment
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* requirements. That also means we waste some space :-( */
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};
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/*
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* Note that these debug functions are very simple and they are meant to
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* remain so. For advanced analysis, record a log file and write perl scripts
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* to analyze them!
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*
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* Don't use these with multithreaded test programs!
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*/
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#define logfile curl_debuglogfile
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FILE *curl_debuglogfile = NULL;
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static bool memlimit = FALSE; /* enable memory limit */
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static long memsize = 0; /* set number of mallocs allowed */
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/* this sets the log file name */
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void curl_memdebug(const char *logname)
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{
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if(!logfile) {
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if(logname && *logname)
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logfile = fopen(logname, FOPEN_WRITETEXT);
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else
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logfile = stderr;
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#ifdef MEMDEBUG_LOG_SYNC
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/* Flush the log file after every line so the log isn't lost in a crash */
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setvbuf(logfile, (char *)NULL, _IOLBF, 0);
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#endif
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}
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}
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/* This function sets the number of malloc() calls that should return
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successfully! */
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void curl_memlimit(long limit)
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{
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if(!memlimit) {
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memlimit = TRUE;
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memsize = limit;
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}
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}
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/* returns TRUE if this isn't allowed! */
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static bool countcheck(const char *func, int line, const char *source)
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{
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/* if source is NULL, then the call is made internally and this check
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should not be made */
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if(memlimit && source) {
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if(!memsize) {
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if(source) {
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/* log to file */
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curl_memlog("LIMIT %s:%d %s reached memlimit\n",
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source, line, func);
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/* log to stderr also */
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fprintf(stderr, "LIMIT %s:%d %s reached memlimit\n",
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source, line, func);
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}
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SET_ERRNO(ENOMEM);
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return TRUE; /* RETURN ERROR! */
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}
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else
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memsize--; /* countdown */
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/* log the countdown */
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if(source)
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curl_memlog("LIMIT %s:%d %ld ALLOCS left\n",
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source, line, memsize);
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}
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return FALSE; /* allow this */
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}
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void *curl_domalloc(size_t wantedsize, int line, const char *source)
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{
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struct memdebug *mem;
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size_t size;
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assert(wantedsize != 0);
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if(countcheck("malloc", line, source))
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return NULL;
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/* alloc at least 64 bytes */
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size = sizeof(struct memdebug)+wantedsize;
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mem = (Curl_cmalloc)(size);
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if(mem) {
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/* fill memory with junk */
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mt_malloc_fill(mem->mem, wantedsize);
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mem->size = wantedsize;
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}
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if(source)
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curl_memlog("MEM %s:%d malloc(%zu) = %p\n",
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source, line, wantedsize,
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mem ? (void *)mem->mem : (void *)0);
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return (mem ? mem->mem : NULL);
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}
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void *curl_docalloc(size_t wanted_elements, size_t wanted_size,
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int line, const char *source)
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{
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struct memdebug *mem;
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size_t size, user_size;
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assert(wanted_elements != 0);
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assert(wanted_size != 0);
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if(countcheck("calloc", line, source))
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return NULL;
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/* alloc at least 64 bytes */
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user_size = wanted_size * wanted_elements;
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size = sizeof(struct memdebug) + user_size;
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mem = (Curl_ccalloc)(1, size);
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if(mem)
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mem->size = user_size;
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if(source)
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curl_memlog("MEM %s:%d calloc(%zu,%zu) = %p\n",
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source, line, wanted_elements, wanted_size,
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mem ? (void *)mem->mem : (void *)0);
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return (mem ? mem->mem : NULL);
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}
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char *curl_dostrdup(const char *str, int line, const char *source)
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{
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char *mem;
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size_t len;
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assert(str != NULL);
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if(countcheck("strdup", line, source))
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return NULL;
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len=strlen(str)+1;
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mem=curl_domalloc(len, 0, NULL); /* NULL prevents logging */
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if(mem)
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memcpy(mem, str, len);
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if(source)
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curl_memlog("MEM %s:%d strdup(%p) (%zu) = %p\n",
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source, line, (void *)str, len, (void *)mem);
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return mem;
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}
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#if defined(WIN32) && defined(UNICODE)
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wchar_t *curl_dowcsdup(const wchar_t *str, int line, const char *source)
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{
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wchar_t *mem;
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size_t wsiz, bsiz;
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assert(str != NULL);
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if(countcheck("wcsdup", line, source))
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return NULL;
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wsiz = wcslen(str) + 1;
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bsiz = wsiz * sizeof(wchar_t);
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mem = curl_domalloc(bsiz, 0, NULL); /* NULL prevents logging */
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if(mem)
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memcpy(mem, str, bsiz);
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if(source)
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curl_memlog("MEM %s:%d wcsdup(%p) (%zu) = %p\n",
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source, line, (void *)str, bsiz, (void *)mem);
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return mem;
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}
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#endif
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/* We provide a realloc() that accepts a NULL as pointer, which then
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performs a malloc(). In order to work with ares. */
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void *curl_dorealloc(void *ptr, size_t wantedsize,
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int line, const char *source)
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{
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struct memdebug *mem=NULL;
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size_t size = sizeof(struct memdebug)+wantedsize;
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assert(wantedsize != 0);
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if(countcheck("realloc", line, source))
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return NULL;
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#ifdef __INTEL_COMPILER
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# pragma warning(push)
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# pragma warning(disable:1684)
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/* 1684: conversion from pointer to same-sized integral type */
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#endif
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if(ptr)
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mem = (void *)((char *)ptr - offsetof(struct memdebug, mem));
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#ifdef __INTEL_COMPILER
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# pragma warning(pop)
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#endif
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mem = (Curl_crealloc)(mem, size);
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if(source)
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curl_memlog("MEM %s:%d realloc(%p, %zu) = %p\n",
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source, line, (void *)ptr, wantedsize,
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mem ? (void *)mem->mem : (void *)0);
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if(mem) {
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mem->size = wantedsize;
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return mem->mem;
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}
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return NULL;
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}
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void curl_dofree(void *ptr, int line, const char *source)
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{
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struct memdebug *mem;
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if(ptr) {
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#ifdef __INTEL_COMPILER
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# pragma warning(push)
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# pragma warning(disable:1684)
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/* 1684: conversion from pointer to same-sized integral type */
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#endif
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mem = (void *)((char *)ptr - offsetof(struct memdebug, mem));
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#ifdef __INTEL_COMPILER
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# pragma warning(pop)
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#endif
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/* destroy */
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mt_free_fill(mem->mem, mem->size);
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/* free for real */
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(Curl_cfree)(mem);
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}
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if(source)
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curl_memlog("MEM %s:%d free(%p)\n", source, line, (void *)ptr);
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}
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curl_socket_t curl_socket(int domain, int type, int protocol,
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int line, const char *source)
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{
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const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
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"FD %s:%d socket() = %d\n" :
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(sizeof(curl_socket_t) == sizeof(long)) ?
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"FD %s:%d socket() = %ld\n" :
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"FD %s:%d socket() = %zd\n";
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curl_socket_t sockfd = socket(domain, type, protocol);
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if(source && (sockfd != CURL_SOCKET_BAD))
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curl_memlog(fmt, source, line, sockfd);
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return sockfd;
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}
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#ifdef HAVE_SOCKETPAIR
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int curl_socketpair(int domain, int type, int protocol,
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curl_socket_t socket_vector[2],
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int line, const char *source)
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{
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const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
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"FD %s:%d socketpair() = %d %d\n" :
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(sizeof(curl_socket_t) == sizeof(long)) ?
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"FD %s:%d socketpair() = %ld %ld\n" :
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"FD %s:%d socketpair() = %zd %zd\n";
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int res = socketpair(domain, type, protocol, socket_vector);
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if(source && (0 == res))
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curl_memlog(fmt, source, line, socket_vector[0], socket_vector[1]);
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return res;
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}
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#endif
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curl_socket_t curl_accept(curl_socket_t s, void *saddr, void *saddrlen,
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int line, const char *source)
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{
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const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
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"FD %s:%d accept() = %d\n" :
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(sizeof(curl_socket_t) == sizeof(long)) ?
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"FD %s:%d accept() = %ld\n" :
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"FD %s:%d accept() = %zd\n";
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struct sockaddr *addr = (struct sockaddr *)saddr;
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curl_socklen_t *addrlen = (curl_socklen_t *)saddrlen;
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curl_socket_t sockfd = accept(s, addr, addrlen);
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if(source && (sockfd != CURL_SOCKET_BAD))
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curl_memlog(fmt, source, line, sockfd);
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return sockfd;
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}
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/* separate function to allow libcurl to mark a "faked" close */
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void curl_mark_sclose(curl_socket_t sockfd, int line, const char *source)
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{
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const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
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"FD %s:%d sclose(%d)\n":
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(sizeof(curl_socket_t) == sizeof(long)) ?
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"FD %s:%d sclose(%ld)\n":
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"FD %s:%d sclose(%zd)\n";
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if(source)
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curl_memlog(fmt, source, line, sockfd);
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}
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/* this is our own defined way to close sockets on *ALL* platforms */
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int curl_sclose(curl_socket_t sockfd, int line, const char *source)
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{
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int res=sclose(sockfd);
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curl_mark_sclose(sockfd, line, source);
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return res;
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}
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FILE *curl_fopen(const char *file, const char *mode,
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int line, const char *source)
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{
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FILE *res=fopen(file, mode);
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if(source)
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curl_memlog("FILE %s:%d fopen(\"%s\",\"%s\") = %p\n",
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source, line, file, mode, (void *)res);
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return res;
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}
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#ifdef HAVE_FDOPEN
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FILE *curl_fdopen(int filedes, const char *mode,
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int line, const char *source)
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{
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FILE *res=fdopen(filedes, mode);
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if(source)
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curl_memlog("FILE %s:%d fdopen(\"%d\",\"%s\") = %p\n",
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source, line, filedes, mode, (void *)res);
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return res;
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}
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#endif
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int curl_fclose(FILE *file, int line, const char *source)
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{
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int res;
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assert(file != NULL);
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res=fclose(file);
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if(source)
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curl_memlog("FILE %s:%d fclose(%p)\n",
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source, line, (void *)file);
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return res;
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}
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#define LOGLINE_BUFSIZE 1024
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/* this does the writting to the memory tracking log file */
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void curl_memlog(const char *format, ...)
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{
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char *buf;
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int nchars;
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va_list ap;
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if(!logfile)
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return;
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buf = (Curl_cmalloc)(LOGLINE_BUFSIZE);
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if(!buf)
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return;
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va_start(ap, format);
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nchars = vsnprintf(buf, LOGLINE_BUFSIZE, format, ap);
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va_end(ap);
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if(nchars > LOGLINE_BUFSIZE - 1)
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nchars = LOGLINE_BUFSIZE - 1;
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if(nchars > 0)
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fwrite(buf, 1, nchars, logfile);
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(Curl_cfree)(buf);
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}
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#endif /* CURLDEBUG */
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