救命！！！移植ctorrent到arm7+uclinux，测试下载到7M左右内存溢出

woaishijie44

救命！！！移植ctorrent到arm7+uclinux，测试下载到7M左右内存溢出 [复制链接]

移植ctorrent到arm7+uclinux，测试下载种子文件到7M左右，内存溢出，程序中止
（该ctorrent已在redhat linux 9.0上跑过无问题）；
所以我用arm-elf-gdb远程调试，在溢出的时候：where，有错误提示如下：
......
n kill () at include/exception:15
#1  0x91763344 in raise () at include/exception:15
#2  0x91764100 in abort () at include/exception:15
#3  0x9175a500 in __default_terminate ()
#4  0x9175a51c in __terminate ()
#5  0x9175a790 in __sjthrow ()
#6  0x9175c9bc in __builtin_vec_new (sz=16384)
    at /8622L/hd-evd/armutils_2.5.144.RC5/build_arm/gcc-2.95.3/gcc/cp/new2.cc:40
#7  0x917437bc in btContent::CacheIO (this=0x9176d8c4, buf=0x90420015 "",
    off=30703616, len=16384, method=1) at btcontent.cpp:536
#8  0x91743704 in btContent::WriteSlice (this=0x9176d8c4, buf=0x90420015 "",
    idx=528, off=1, len=16384) at btcontent.cpp:516
#9  0x9174cb70 in btPeer::PieceDeliver (this=0x90439020, mlen=2420347600)
    at peer.cpp:682
#10 0x9174be30 in btPeer::MsgDeliver (this=0x90439020) at peer.cpp:432
#11 0x9174de58 in btPeer::RecvModule (this=0x90439020) at peer.cpp:999
#12 0x917506fc in PeerList::AnyPeerReady (this=0x90439020, rfdp=0x9177fe18,
    wfdp=0x9177fd98, nready=0x9177fd8c) at peerlist.cpp:721
#13 0x91749bf8 in Downloader () at downloader.cpp:68
#14 0x91749054 in main (argc=-1854596644, argv=0x9176de20) at ctorrent.cpp:93
(gdb) list btContent
....
另外我用打印pnew->bc_buf地址，发现其地址不断增加，直到有溢出。

下面是 btcontent.cpp 里相关函数：
......
......
ssize_t btContent::CacheIO(char *buf, u_int64_t off, size_t len, int method)
{
  BTCACHE *p;
  BTCACHE *pp = (BTCACHE*) 0;
  BTCACHE *pnew = (BTCACHE*) 0;//BTCACHE已定义

  for( ; m_cache_size < (m_cache_used + len); ) CacheClean();
 
  if( 0 == method && m_btfiles.IO(buf, off, len, method) < 0) return -1;
 
  pnew = new BTCACHE;

#ifndef WINDOWS
  if( !pnew )
    return method ? m_btfiles.IO(buf, off, len, method) : 0;
#endif

  pnew->bc_buf = new char[len];     //c:536

  if( pp ) pp->bc_next = pnew; else

#ifndef WINDOWS
  if( !(pnew->bc_buf) ){
    delete pnew;
    return method ? m_btfiles.IO(buf, off, len, method) : 0;
  }
#endif
 
  memcpy(pnew->bc_buf, buf, len);
  pnew->bc_off = off;
  pnew->bc_len = len;
  pnew->bc_f_flush = method;
  m_cache_used += len;
  time(&pnew->bc_last_timestamp);
 
  // find insert point.
  for(p = m_cache; p && off > p->bc_off; pp = p, p = pp->bc_next) ;

  pnew->bc_next = p;   
  m_cache = pnew;
  return 0;
}
........
........

该 pnew->bc_buf 也没有在其他函数中用到，所以我在该函数末尾delete pnew->bc_buf，重新编译后测试，程序可跑，有下载速度，但是不能保存内容。
此外，系统里new2.cc:40文件有throw...，请大虾帮忙看看

woaishijie44

丁

njlianjian

没有听说过这个东西 帮你顶一下