483 lines
9.8 KiB
C
483 lines
9.8 KiB
C
/* Replay a remote debug session logfile for GDB.
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Copyright (C) 1996, 1998, 1999, 2000, 2002, 2003, 2005, 2006, 2007, 2008,
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2009, 2010, 2011 Free Software Foundation, Inc.
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Written by Fred Fish (fnf@cygnus.com) from pieces of gdbserver.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include <stdio.h>
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#if HAVE_SYS_FILE_H
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#include <sys/file.h>
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#endif
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#if HAVE_SIGNAL_H
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#include <signal.h>
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#endif
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#include <ctype.h>
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#if HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#if HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#if HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#if HAVE_NETINET_TCP_H
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#include <netinet/tcp.h>
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#endif
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#if HAVE_ALLOCA_H
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#include <alloca.h>
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#endif
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#if HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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#if USE_WIN32API
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#include <winsock2.h>
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#endif
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#ifndef HAVE_SOCKLEN_T
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typedef int socklen_t;
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#endif
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/* Sort of a hack... */
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#define EOL (EOF - 1)
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/* Version information, from version.c. */
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extern const char version[];
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extern const char host_name[];
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static int remote_desc;
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#ifdef __MINGW32CE__
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#ifndef COUNTOF
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#define COUNTOF(STR) (sizeof (STR) / sizeof ((STR)[0]))
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#endif
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#define errno (GetLastError ())
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char *
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strerror (DWORD error)
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{
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static char buf[1024];
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WCHAR *msgbuf;
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DWORD lasterr = GetLastError ();
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DWORD chars = FormatMessageW (FORMAT_MESSAGE_FROM_SYSTEM
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| FORMAT_MESSAGE_ALLOCATE_BUFFER,
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NULL,
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error,
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0, /* Default language */
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(LPVOID)&msgbuf,
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0,
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NULL);
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if (chars != 0)
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{
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/* If there is an \r\n appended, zap it. */
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if (chars >= 2
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&& msgbuf[chars - 2] == '\r'
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&& msgbuf[chars - 1] == '\n')
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{
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chars -= 2;
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msgbuf[chars] = 0;
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}
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if (chars > ((COUNTOF (buf)) - 1))
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{
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chars = COUNTOF (buf) - 1;
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msgbuf [chars] = 0;
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}
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wcstombs (buf, msgbuf, chars + 1);
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LocalFree (msgbuf);
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}
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else
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sprintf (buf, "unknown win32 error (%ld)", error);
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SetLastError (lasterr);
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return buf;
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}
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#endif /* __MINGW32CE__ */
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/* Print the system error message for errno, and also mention STRING
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as the file name for which the error was encountered.
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Then return to command level. */
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static void
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perror_with_name (const char *string)
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{
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#ifndef STDC_HEADERS
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extern int errno;
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#endif
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const char *err;
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char *combined;
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err = strerror (errno);
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if (err == NULL)
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err = "unknown error";
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combined = (char *) alloca (strlen (err) + strlen (string) + 3);
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strcpy (combined, string);
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strcat (combined, ": ");
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strcat (combined, err);
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fprintf (stderr, "\n%s.\n", combined);
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fflush (stderr);
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exit (1);
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}
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static void
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sync_error (FILE *fp, char *desc, int expect, int got)
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{
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fprintf (stderr, "\n%s\n", desc);
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fprintf (stderr, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
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ftell (fp), expect, got);
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fflush (stderr);
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exit (1);
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}
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static void
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remote_error (const char *desc)
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{
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fprintf (stderr, "\n%s\n", desc);
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fflush (stderr);
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exit (1);
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}
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static void
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remote_close (void)
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{
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#ifdef USE_WIN32API
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closesocket (remote_desc);
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#else
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close (remote_desc);
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#endif
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}
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/* Open a connection to a remote debugger.
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NAME is the filename used for communication. */
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static void
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remote_open (char *name)
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{
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if (!strchr (name, ':'))
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{
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fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name);
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fflush (stderr);
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exit (1);
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}
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else
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{
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#ifdef USE_WIN32API
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static int winsock_initialized;
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#endif
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char *port_str;
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int port;
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struct sockaddr_in sockaddr;
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socklen_t tmp;
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int tmp_desc;
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port_str = strchr (name, ':');
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port = atoi (port_str + 1);
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#ifdef USE_WIN32API
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if (!winsock_initialized)
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{
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WSADATA wsad;
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WSAStartup (MAKEWORD (1, 0), &wsad);
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winsock_initialized = 1;
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}
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#endif
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tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
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if (tmp_desc == -1)
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perror_with_name ("Can't open socket");
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/* Allow rapid reuse of this port. */
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tmp = 1;
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setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
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sizeof (tmp));
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sockaddr.sin_family = PF_INET;
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sockaddr.sin_port = htons (port);
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sockaddr.sin_addr.s_addr = INADDR_ANY;
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if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
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|| listen (tmp_desc, 1))
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perror_with_name ("Can't bind address");
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tmp = sizeof (sockaddr);
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remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp);
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if (remote_desc == -1)
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perror_with_name ("Accept failed");
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/* Enable TCP keep alive process. */
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tmp = 1;
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setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp));
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/* Tell TCP not to delay small packets. This greatly speeds up
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interactive response. */
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tmp = 1;
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setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY,
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(char *) &tmp, sizeof (tmp));
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#ifndef USE_WIN32API
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close (tmp_desc); /* No longer need this */
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signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbreplay simply
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exits when the remote side dies. */
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#else
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closesocket (tmp_desc); /* No longer need this */
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#endif
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}
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#if defined(F_SETFL) && defined (FASYNC)
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fcntl (remote_desc, F_SETFL, FASYNC);
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#endif
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fprintf (stderr, "Replay logfile using %s\n", name);
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fflush (stderr);
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}
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static int
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tohex (int ch)
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{
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if (ch >= '0' && ch <= '9')
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{
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return (ch - '0');
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}
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if (ch >= 'A' && ch <= 'F')
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{
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return (ch - 'A' + 10);
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}
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if (ch >= 'a' && ch <= 'f')
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{
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return (ch - 'a' + 10);
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}
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fprintf (stderr, "\nInvalid hex digit '%c'\n", ch);
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fflush (stderr);
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exit (1);
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}
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static int
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logchar (FILE *fp)
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{
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int ch;
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int ch2;
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ch = fgetc (fp);
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fputc (ch, stdout);
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fflush (stdout);
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switch (ch)
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{
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case '\n':
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ch = EOL;
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break;
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case '\\':
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ch = fgetc (fp);
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fputc (ch, stdout);
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fflush (stdout);
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switch (ch)
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{
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case '\\':
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break;
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case 'b':
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ch = '\b';
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break;
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case 'f':
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ch = '\f';
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break;
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case 'n':
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ch = '\n';
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break;
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case 'r':
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ch = '\r';
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break;
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case 't':
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ch = '\t';
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break;
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case 'v':
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ch = '\v';
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break;
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case 'x':
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ch2 = fgetc (fp);
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fputc (ch2, stdout);
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fflush (stdout);
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ch = tohex (ch2) << 4;
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ch2 = fgetc (fp);
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fputc (ch2, stdout);
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fflush (stdout);
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ch |= tohex (ch2);
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break;
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default:
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/* Treat any other char as just itself */
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break;
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}
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default:
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break;
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}
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return (ch);
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}
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static int
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gdbchar (int desc)
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{
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unsigned char fromgdb;
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if (read (desc, &fromgdb, 1) != 1)
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return -1;
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else
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return fromgdb;
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}
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/* Accept input from gdb and match with chars from fp (after skipping one
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blank) up until a \n is read from fp (which is not matched) */
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static void
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expect (FILE *fp)
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{
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int fromlog;
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int fromgdb;
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if ((fromlog = logchar (fp)) != ' ')
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{
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sync_error (fp, "Sync error during gdb read of leading blank", ' ',
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fromlog);
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}
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do
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{
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fromlog = logchar (fp);
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if (fromlog == EOL)
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break;
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fromgdb = gdbchar (remote_desc);
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if (fromgdb < 0)
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remote_error ("Error during read from gdb");
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}
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while (fromlog == fromgdb);
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if (fromlog != EOL)
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{
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sync_error (fp, "Sync error during read of gdb packet from log", fromlog,
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fromgdb);
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}
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}
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/* Play data back to gdb from fp (after skipping leading blank) up until a
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\n is read from fp (which is discarded and not sent to gdb). */
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static void
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play (FILE *fp)
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{
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int fromlog;
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char ch;
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if ((fromlog = logchar (fp)) != ' ')
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{
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sync_error (fp, "Sync error skipping blank during write to gdb", ' ',
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fromlog);
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}
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while ((fromlog = logchar (fp)) != EOL)
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{
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ch = fromlog;
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if (write (remote_desc, &ch, 1) != 1)
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remote_error ("Error during write to gdb");
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}
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}
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static void
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gdbreplay_version (void)
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{
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printf ("GNU gdbreplay %s%s\n"
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"Copyright (C) 2011 Free Software Foundation, Inc.\n"
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"gdbreplay is free software, covered by the GNU General Public License.\n"
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"This gdbreplay was configured as \"%s\"\n",
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PKGVERSION, version, host_name);
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}
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static void
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gdbreplay_usage (FILE *stream)
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{
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fprintf (stream, "Usage:\tgdbreplay <logfile> <host:port>\n");
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if (REPORT_BUGS_TO[0] && stream == stdout)
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fprintf (stream, "Report bugs to \"%s\".\n", REPORT_BUGS_TO);
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}
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int
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main (int argc, char *argv[])
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{
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FILE *fp;
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int ch;
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if (argc >= 2 && strcmp (argv[1], "--version") == 0)
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{
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gdbreplay_version ();
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exit (0);
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}
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if (argc >= 2 && strcmp (argv[1], "--help") == 0)
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{
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gdbreplay_usage (stdout);
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exit (0);
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}
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if (argc < 3)
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{
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gdbreplay_usage (stderr);
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exit (1);
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}
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fp = fopen (argv[1], "r");
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if (fp == NULL)
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{
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perror_with_name (argv[1]);
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}
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remote_open (argv[2]);
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while ((ch = logchar (fp)) != EOF)
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{
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switch (ch)
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{
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case 'w':
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/* data sent from gdb to gdbreplay, accept and match it */
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expect (fp);
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break;
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case 'r':
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/* data sent from gdbreplay to gdb, play it */
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play (fp);
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break;
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case 'c':
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/* Command executed by gdb */
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while ((ch = logchar (fp)) != EOL);
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break;
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}
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}
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remote_close ();
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exit (0);
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}
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