Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!UUNET.UU.NET!kewill!bryan
From: kewill!bryan@UUNET.UU.NET (Bryan Boreham)
Newsgroups: gnu.gdb.bug
Subject: read_memory bug
Message-ID: <8909171435.AA19422@edinburgh.kewill.uucp>
Date: 17 Sep 89 14:35:59 GMT
Sender: daemon@tut.cis.ohio-state.edu
Distribution: gnu
Organization: GNUs Not Usenet
Lines: 24

This code in core.c contains an error:

int
read_memory (memaddr, myaddr, len)
     CORE_ADDR memaddr;
     char *myaddr;
     int len;
{
  if (len == 0)
    return;	<---- return what?

  if (have_inferior_p ())
      return read_inferior_memory (memaddr, myaddr, len);
  else
      return xfer_core_file (memaddr, myaddr, len);
}


I'd say it should return 0.

This sometimes causes gdb to report that ptrace got an "unknown error"
when you try to print *p when p is declared like "struct foobar *p;".

Bryan.