user-0 提问: 写了个转码函数，偶尔出现malloc：memory corruption异常，帮分析下。。。

回复:
user: user-1
content: outputbuf = (char *)malloc(outputbuf); 楼主可以网上搜下malloc的用法   void *malloc(size_t size);   malloc() allocates size bytes and returns a pointer to the allocated memory

user: user-2
content: 请检查以下行： outputbuf = (char *)malloc(outputbuf); 是否要改为： outputbuf = (char *)malloc(outputlen);  以下行： inputbuf = (char *)malloc(inputlen); 改为： inputbuf = (char *)malloc(inputlen+1); 给结尾留个字节。

user: user-3
content: outputbuf = (char *)malloc(outputbuf); 你确定你想干这个？

user: user-4
content: 仅供参考#include <stdio.h> #include <stdlib.h> #include <string.h> #ifdef WIN32     #include <windows.h>     #include <io.h> #else     #include <unistd.h>     #include <sys/time.h>     #include <pthread.h>     #define  CRITICAL_SECTION   pthread_mutex_t     #define  _vsnprintf         vsnprintf #endif //Log{ #define MAXLOGSIZE 20000000 #define MAXLINSIZE 16000 #include <time.h> #include <sys/timeb.h> #include <stdarg.h> char logfilename1[]="MyLog1.log"; char logfilename2[]="MyLog2.log"; static char logstr[MAXLINSIZE+1]; char datestr[16]; char timestr[16]; char mss[4]; CRITICAL_SECTION cs_log; FILE *flog; #ifdef WIN32 void Lock(CRITICAL_SECTION *l) {     EnterCriticalSection(l); } void Unlock(CRITICAL_SECTION *l) {     LeaveCriticalSection(l); } #else void Lock(CRITICAL_SECTION *l) {     pthread_mutex_lock(l); } void Unlock(CRITICAL_SECTION *l) {     pthread_mutex_unlock(l); } #endif void LogV(const char *pszFmt,va_list argp) {     struct tm *now;     struct timeb tb;      if (NULL==pszFmt||0==pszFmt[0]) return;     _vsnprintf(logstr,MAXLINSIZE,pszFmt,argp);     ftime(&tb);     now=localtime(&tb.time);     sprintf(datestr,"%04d-%02d-%02d",now->tm_year+1900,now->tm_mon+1,now->tm_mday);     sprintf(timestr,"%02d:%02d:%02d",now->tm_hour     ,now->tm_min  ,now->tm_sec );     sprintf(mss,"%03d",tb.millitm);     printf("%s %s.%s %s",datestr,timestr,mss,logstr);     flog=fopen(logfilename1,"a");     if (NULL!=flog) {         fprintf(flog,"%s %s.%s %s",datestr,timestr,mss,logstr);         if (ftell(flog)>MAXLOGSIZE) {             fclose(flog);             if (rename(logfilename1,logfilename2)) {                 remove(logfilename2);                 rename(logfilename1,logfilename2);             }         } else {             fclose(flog);         }     } } void Log(const char *pszFmt,...) {     va_list argp;      Lock(&cs_log);     va_start(argp,pszFmt);     LogV(pszFmt,argp);     va_end(argp);     Unlock(&cs_log); } //Log} int main(int argc,char * argv[]) {     int i; #ifdef WIN32     InitializeCriticalSection(&cs_log); #else     pthread_mutex_init(&cs_log,NULL); #endif     for (i=0;i<10000;i++) {         Log("This is a Log %04d from FILE:%s LINE:%d\n",i, __FILE__, __LINE__);     } #ifdef WIN32     DeleteCriticalSection(&cs_log); #else     pthread_mutex_destroy(&cs_log); #endif     return 0; } //1-78行添加到你带main的.c或.cpp的那个文件的最前面 //81-85行添加到你的main函数开头 //89-93行添加到你的main函数结束前 //在要写LOG的地方仿照第87行的写法写LOG到文件MyLog1.log中

user: user-5
content: 楼主你根本就没有娶到参数：  void SYSLOG（int priority, const char *format,...） {   va_list args;//定义一个泛用的参数变量，实际是一个char*   char buffer[1024];   va_start(args, format)；//得到format的地址；    vsprintf(buffer, format, args);//此处肯定就要出大问题！     va_end(args);//将args设置为NULL    // 进行转码   charsetconvert(buffer);   // 写log   syslog(priority, buffer); }

user: user-0
content: 引用 1 楼 FancyMouse 的回复:outputbuf = (char *)malloc(outputbuf); 你确定你想干这个？ 手打错了，应该是outputbuf = (char *)malloc(outputlen);

user: user-0
content: 引用 2 楼 logiciel 的回复:请检查以下行： outputbuf = (char *)malloc(outputbuf); 是否要改为： outputbuf = (char *)malloc(outputlen);  以下行： inputbuf = (char *)malloc(inputlen); 改为： inputbuf = (char *)malloc(inputlen+1); 给结尾留个字节。  手打错了，应该是outputbuf = (char *)malloc(outputlen); 这个我查查inputbuf = (char *)malloc(inputlen+1);

user: user-0
content: 引用 3 楼 max_min_ 的回复:outputbuf = (char *)malloc(outputbuf); 楼主可以网上搜下malloc的用法   void *malloc(size_t size);   malloc() allocates size bytes and returns a pointer to the allocated memory  手打错了，应该是outputbuf = (char *)malloc(outputlen);