可能由_wordcopy_fwd_dest_aligned 引起的一处内存出错

 ==28356== Thread 9:1481 ==28356== Invalid read of size 81482 ==28356==    at 0x3328A7BA95: _wordcopy_fwd_dest_aligned (in /lib64/libc-2.5.so)1483 ==28356==    by 0x3328A7B0FF: bcopy (in /lib64/libc-2.5.so)1484 ==28356==    by 0x5E3C45: unsigned int CSocket::packetPackZip<ByteBuffer<unsigned char [65560]> >(void const*, unsigned int, ByteBuffer<unsigned char [65560]>&, bool) 

        这是通过memcheck检查到的一个内存读错误，

        发现可能是因为 _wordcopy_fwd_dest_aligned 偏移对齐的操作引起的

http://www.oschina.net/code/explore/glibc-2.9/sysdeps/powerpc/powerpc32/power4/wordcopy.c

/** _wordcopy_fwd_dest_aligned -- Copy block beginning at SRCP to

064   block beginning at DSTP with LEN `op_t' words (not LEN bytes!).

065   DSTP should be aligned for memory operations on `op_t's, but SRCP must

066   *not* be aligned.  */

067 

068void

069_wordcopy_fwd_dest_aligned (dstp, srcp, len)

070     long int dstp;

071     long int srcp;

072     size_t len;

073{

074  op_t a0, a1, a2;

075  int sh_1, sh_2;

076 

077  /** Calculate how to shift a word read at the memory operation

078     aligned srcp to make it aligned for copy.  */

079 

080  sh_1 = 8 * (srcp % OPSIZ);

081  sh_2 = 8 * OPSIZ - sh_1;

082 

083  /** Make SRCP aligned by rounding it down to the beginning of the `op_t'

084     it points in the middle of.  */

085  srcp &= -OPSIZ;

086  a0 = ((op_t *) srcp)[0];

087 

088  if (len & 1)

089  {

090    a1 = ((op_t *) srcp)[1];

091    ((op_t *) dstp)[0] = MERGE (a0, sh_1, a1, sh_2);

092     

093    if (len == 1)

094      return;

095     

096    a0 = a1;

097    srcp += OPSIZ;

098    dstp += OPSIZ;

099    len -= 1;

100  }

101 

102  do

103    {

104      a1 = ((op_t *) srcp)[1];

105      a2 = ((op_t *) srcp)[2];

106      ((op_t *) dstp)[0] = MERGE (a0, sh_1, a1, sh_2);

107      ((op_t *) dstp)[1] = MERGE (a1, sh_1, a2, sh_2);

108      a0 = a2;

109 

110      srcp += 2 * OPSIZ;

111      dstp += 2 * OPSIZ;

112      len -= 2;

113    }

114  while (len != 0);

115}

              暂时没有想到很好的解决方案，先用memmove 代替 bcopy