curl/lib/memdebug.c

289 строки
7.2 KiB
C

#ifdef CURLDEBUG
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* $Id$
***************************************************************************/
#include "setup.h"
#include <curl/curl.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#define _MPRINTF_REPLACE
#include <curl/mprintf.h>
#include "urldata.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#define MEMDEBUG_NODEFINES /* don't redefine the standard functions */
#include "memdebug.h"
struct memdebug {
size_t size;
double mem[1];
/* I'm hoping this is the thing with the strictest alignment
* requirements. That also means we waste some space :-( */
};
/*
* Note that these debug functions are very simple and they are meant to
* remain so. For advanced analysis, record a log file and write perl scripts
* to analyze them!
*
* Don't use these with multithreaded test programs!
*/
#define logfile curl_debuglogfile
FILE *curl_debuglogfile;
static bool memlimit; /* enable memory limit */
static long memsize; /* set number of mallocs allowed */
/* this sets the log file name */
void curl_memdebug(const char *logname)
{
if(logname)
logfile = fopen(logname, "w");
else
logfile = stderr;
}
/* This function sets the number of malloc() calls that should return
successfully! */
void curl_memlimit(long limit)
{
memlimit = TRUE;
memsize = limit;
}
/* returns TRUE if this isn't allowed! */
static bool countcheck(const char *func, int line, const char *source)
{
/* if source is NULL, then the call is made internally and this check
should not be made */
if(memlimit && source) {
if(!memsize) {
if(logfile && source)
fprintf(logfile, "LIMIT %s:%d %s reached memlimit\n",
source, line, func);
return TRUE; /* RETURN ERROR! */
}
else
memsize--; /* countdown */
/* log the countdown */
if(logfile && source)
fprintf(logfile, "LIMIT %s:%d %ld ALLOCS left\n",
source, line, memsize);
}
return FALSE; /* allow this */
}
void *curl_domalloc(size_t wantedsize, int line, const char *source)
{
struct memdebug *mem;
size_t size;
if(countcheck("malloc", line, source))
return NULL;
/* alloc at least 64 bytes */
size = sizeof(struct memdebug)+wantedsize;
mem=(struct memdebug *)(malloc)(size);
if(mem) {
/* fill memory with junk */
memset(mem->mem, 0xA5, wantedsize);
mem->size = wantedsize;
}
if(logfile && source)
fprintf(logfile, "MEM %s:%d malloc(%zd) = %p\n",
source, line, wantedsize, mem->mem);
return mem->mem;
}
void *curl_docalloc(size_t wanted_elements, size_t wanted_size,
int line, const char *source)
{
struct memdebug *mem;
size_t size, user_size;
if(countcheck("calloc", line, source))
return NULL;
/* alloc at least 64 bytes */
user_size = wanted_size * wanted_elements;
size = sizeof(struct memdebug) + user_size;
mem = (struct memdebug *)(malloc)(size);
if(mem) {
/* fill memory with zeroes */
memset(mem->mem, 0, user_size);
mem->size = user_size;
}
if(logfile && source)
fprintf(logfile, "MEM %s:%d calloc(%u,%u) = %p\n",
source, line, wanted_elements, wanted_size, mem->mem);
return mem->mem;
}
char *curl_dostrdup(const char *str, int line, const char *source)
{
char *mem;
size_t len;
curlassert(str != NULL);
if(countcheck("strdup", line, source))
return NULL;
len=strlen(str)+1;
mem=curl_domalloc(len, 0, NULL); /* NULL prevents logging */
memcpy(mem, str, len);
if(logfile)
fprintf(logfile, "MEM %s:%d strdup(%p) (%zd) = %p\n",
source, line, str, len, mem);
return mem;
}
/* We provide a realloc() that accepts a NULL as pointer, which then
performs a malloc(). In order to work with ares. */
void *curl_dorealloc(void *ptr, size_t wantedsize,
int line, const char *source)
{
struct memdebug *mem=NULL;
size_t size = sizeof(struct memdebug)+wantedsize;
if(countcheck("realloc", line, source))
return NULL;
if(ptr)
mem = (struct memdebug *)((char *)ptr - offsetof(struct memdebug, mem));
mem=(struct memdebug *)(realloc)(mem, size);
if(logfile)
fprintf(logfile, "MEM %s:%d realloc(0x%x, %zd) = %p\n",
source, line, ptr, wantedsize, mem?mem->mem:NULL);
if(mem) {
mem->size = wantedsize;
return mem->mem;
}
return NULL;
}
void curl_dofree(void *ptr, int line, const char *source)
{
struct memdebug *mem;
curlassert(ptr != NULL);
mem = (struct memdebug *)((char *)ptr - offsetof(struct memdebug, mem));
/* destroy */
memset(mem->mem, 0x13, mem->size);
/* free for real */
(free)(mem);
if(logfile)
fprintf(logfile, "MEM %s:%d free(%p)\n", source, line, ptr);
}
int curl_socket(int domain, int type, int protocol, int line,
const char *source)
{
int sockfd=(socket)(domain, type, protocol);
if(logfile && (sockfd!=-1))
fprintf(logfile, "FD %s:%d socket() = %d\n",
source, line, sockfd);
return sockfd;
}
int curl_accept(int s, void *saddr, void *saddrlen,
int line, const char *source)
{
struct sockaddr *addr = (struct sockaddr *)saddr;
socklen_t *addrlen = (socklen_t *)saddrlen;
int sockfd=(accept)(s, addr, addrlen);
if(logfile)
fprintf(logfile, "FD %s:%d accept() = %d\n",
source, line, sockfd);
return sockfd;
}
/* this is our own defined way to close sockets on *ALL* platforms */
int curl_sclose(int sockfd, int line, const char *source)
{
int res=sclose(sockfd);
if(logfile)
fprintf(logfile, "FD %s:%d sclose(%d)\n",
source, line, sockfd);
return res;
}
FILE *curl_fopen(const char *file, const char *mode,
int line, const char *source)
{
FILE *res=(fopen)(file, mode);
if(logfile)
fprintf(logfile, "FILE %s:%d fopen(\"%s\",\"%s\") = %p\n",
source, line, file, mode, res);
return res;
}
int curl_fclose(FILE *file, int line, const char *source)
{
int res;
curlassert(file != NULL);
res=(fclose)(file);
if(logfile)
fprintf(logfile, "FILE %s:%d fclose(%p)\n",
source, line, file);
return res;
}
#else
#ifdef VMS
int VOID_VAR_MEMDEBUG;
#else
/* we provide a fake do-nothing function here to avoid compiler warnings */
void curl_memdebug(void) {}
#endif /* VMS */
#endif /* CURLDEBUG */