[deliverable/binutils-gdb.git] / gdb / gdbserver / gdbreplay.c

/* Replay a remote debug session logfile for GDB.
   Copyright (C) 1996 Free Software Foundation, Inc.
   Written by Fred Fish (fnf@cygnus.com) from pieces of gdbserver.

This file is part of GDB.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#include <stdio.h>
#include <sys/file.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/tcp.h>
#include <signal.h>
#include <ctype.h>
#include <fcntl.h>

/* Sort of a hack... */
#define EOL (EOF - 1)

static int remote_desc;

/* Print the system error message for errno, and also mention STRING
   as the file name for which the error was encountered.
   Then return to command level.  */

void
perror_with_name (string)
     char *string;
{
  extern int sys_nerr;
  extern char *sys_errlist[];
  extern int errno;
  char *err;
  char *combined;

  err = (errno < sys_nerr) ? sys_errlist[errno] : "unknown error";
  combined = (char *) alloca (strlen (err) + strlen (string) + 3);
  strcpy (combined, string);
  strcat (combined, ": ");
  strcat (combined, err);
  fprintf (stderr, "\n%s.\n", combined);
  fflush (stderr);
  exit (1);
}

static void
sync_error (fp, desc, expect, got)
     FILE *fp;
     char *desc;
     int expect;
     int got;
{
  fprintf (stderr, "\n%s\n", desc);
  fprintf (stderr, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
	   ftell (fp), expect, got);
  fflush (stderr);
  exit (1);
}

void
remote_close()
{
  close (remote_desc);
}

/* Open a connection to a remote debugger.
   NAME is the filename used for communication.  */

void
remote_open (name)
     char *name;
{
  extern char *strchr ();

  if (!strchr (name, ':'))
    {
      fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name);
      fflush (stderr);
      exit (1);
    }
  else
    {
      char *port_str;
      int port;
      struct sockaddr_in sockaddr;
      int tmp;
      struct protoent *protoent;
      int tmp_desc;

      port_str = strchr (name, ':');

      port = atoi (port_str + 1);

      tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
      if (tmp_desc < 0)
	perror_with_name ("Can't open socket");

      /* Allow rapid reuse of this port. */
      tmp = 1;
      setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *)&tmp,
		  sizeof(tmp));

      sockaddr.sin_family = PF_INET;
      sockaddr.sin_port = htons(port);
      sockaddr.sin_addr.s_addr = INADDR_ANY;

      if (bind (tmp_desc, (struct sockaddr *)&sockaddr, sizeof (sockaddr))
	  || listen (tmp_desc, 1))
	perror_with_name ("Can't bind address");

      tmp = sizeof (sockaddr);
      remote_desc = accept (tmp_desc, (struct sockaddr *)&sockaddr, &tmp);
      if (remote_desc == -1)
	perror_with_name ("Accept failed");

      protoent = getprotobyname ("tcp");
      if (!protoent)
	perror_with_name ("getprotobyname");

      /* Enable TCP keep alive process. */
      tmp = 1;
      setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *)&tmp, sizeof(tmp));

      /* Tell TCP not to delay small packets.  This greatly speeds up
	 interactive response. */
      tmp = 1;
      setsockopt (remote_desc, protoent->p_proto, TCP_NODELAY,
		  (char *)&tmp, sizeof(tmp));

      close (tmp_desc);		/* No longer need this */

      signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbreplay simply
				    exits when the remote side dies.  */
    }

  fcntl (remote_desc, F_SETFL, FASYNC);

  fprintf (stderr, "Replay logfile using %s\n", name);
  fflush (stderr);
}

static int tohex (ch)
     int ch;
{
  if (ch >= '0' && ch <= '9')
    {
      return (ch - '0');
    }
  if (ch >= 'A' && ch <= 'F')
    {
      return (ch - 'A' + 10);
    }
  if (ch >= 'a' && ch <= 'f')
    {
      return (ch - 'a' + 10);
    }
  fprintf (stderr, "\nInvalid hex digit '%c'\n", ch);
  fflush (stderr);
  exit (1);
}

static int
logchar (fp)
     FILE *fp;
{
  int ch;
  int ch2;

  ch = fgetc (fp);
  fputc (ch, stdout);
  fflush (stdout);
  switch (ch)
    {
    case '\n':
      ch = EOL;
      break;
    case '\\':
      ch = fgetc (fp);
      fputc (ch, stdout);
      fflush (stdout);
      switch (ch)
	{
	case '\\': break;
	case 'b': ch = '\b'; break;
	case 'f': ch = '\f'; break;
	case 'n': ch = '\n'; break;
	case 'r': ch = '\r'; break;
	case 't': ch = '\t'; break;
	case 'v': ch = '\v'; break;
	case 'x':
	  ch2 = fgetc (fp);
	  fputc (ch2, stdout);
	  fflush (stdout);
	  ch = tohex (ch2) << 4;
	  ch2 = fgetc (fp);
	  fputc (ch2, stdout);
	  fflush (stdout);
	  ch |= tohex (ch2);
	  break;
	default:
	  /* Treat any other char as just itself */
	  break;
	}
    default:
      break;
    }
  return (ch);
}

/* Accept input from gdb and match with chars from fp (after skipping one
   blank) up until a \n is read from fp (which is not matched) */

void
expect (fp)
     FILE *fp;
{
  int fromlog;
  unsigned char fromgdb;

  if ((fromlog = logchar (fp)) != ' ')
    {
      sync_error (fp, "Sync error during gdb read of leading blank", ' ',
		  fromlog);
    }
  do
    {
      fromlog = logchar (fp);
      if (fromlog == EOL)
	{
	  break;
	}
      read (remote_desc, &fromgdb, 1);
    } while (fromlog == fromgdb);
  if (fromlog != EOL)
    {
      sync_error (fp, "Sync error during read of gdb packet", fromlog,
		  fromgdb);
    }
}

/* Play data back to gdb from fp (after skipping leading blank) up until a
   \n is read from fp (which is discarded and not sent to gdb). */

void
play (fp)
     FILE *fp;
{
  int fromlog;
  char ch;

  if ((fromlog = logchar (fp)) != ' ')
    {
      sync_error (fp, "Sync error skipping blank during write to gdb", ' ',
		  fromlog);
    }
  while ((fromlog = logchar (fp)) != EOL)
    {
      ch = fromlog;
      write (remote_desc, &ch, 1);
    }
}

int
main (argc, argv)
     int argc;
     char *argv[];
{
  FILE *fp;
  int ch;

  if (argc < 3)
    {
      fprintf (stderr, "Usage: gdbreplay <logfile> <host:port>\n");
      fflush (stderr);
      exit (1);
    }
  fp = fopen (argv[1], "r");
  if (fp == NULL)
    {
      perror_with_name (argv[1]);
    }      
  remote_open (argv[2]);
  while ((ch = logchar (fp)) != EOF)
    {
      switch (ch)
	{
	case 'w':
	  /* data sent from gdb to gdbreplay, accept and match it */
	  expect (fp);
	  break;
	case 'r':
	  /* data sent from gdbreplay to gdb, play it */
	  play (fp);
	  break;
	case 'c':
	  /* Command executed by gdb */
	  while ((ch = logchar (fp)) != EOL);
	  break;
	}
    }
  remote_close ();
  exit (0);
}
Commit	Line	Data
c906108c SS	1	/* Replay a remote debug session logfile for GDB.
	2	Copyright (C) 1996 Free Software Foundation, Inc.
	3	Written by Fred Fish (fnf@cygnus.com) from pieces of gdbserver.
	4
	5	This file is part of GDB.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	20
	21	#include <stdio.h>
	22	#include <sys/file.h>
	23	#include <netinet/in.h>
	24	#include <sys/socket.h>
	25	#include <netdb.h>
	26	#include <netinet/tcp.h>
	27	#include <signal.h>
	28	#include <ctype.h>
	29	#include <fcntl.h>
	30
	31	/* Sort of a hack... */
	32	#define EOL (EOF - 1)
	33
	34	static int remote_desc;
	35
	36	/* Print the system error message for errno, and also mention STRING
	37	as the file name for which the error was encountered.
	38	Then return to command level. */
	39
	40	void
	41	perror_with_name (string)
	42	char *string;
	43	{
	44	extern int sys_nerr;
	45	extern char *sys_errlist[];
	46	extern int errno;
	47	char *err;
	48	char *combined;
	49
	50	err = (errno < sys_nerr) ? sys_errlist[errno] : "unknown error";
	51	combined = (char *) alloca (strlen (err) + strlen (string) + 3);
	52	strcpy (combined, string);
	53	strcat (combined, ": ");
	54	strcat (combined, err);
	55	fprintf (stderr, "\n%s.\n", combined);
	56	fflush (stderr);
	57	exit (1);
	58	}
	59
	60	static void
	61	sync_error (fp, desc, expect, got)
	62	FILE *fp;
	63	char *desc;
	64	int expect;
65	int got;
66	{
67	fprintf (stderr, "\n%s\n", desc);
68	fprintf (stderr, "At logfile offset %ld, expected '0x%x' got '0x%x'\n",
69	ftell (fp), expect, got);
70	fflush (stderr);
71	exit (1);
72	}
73
74	void
75	remote_close()
76	{
77	close (remote_desc);
78	}
79
80	/* Open a connection to a remote debugger.
81	NAME is the filename used for communication. */
82
83	void
84	remote_open (name)
85	char *name;
86	{
87	extern char *strchr ();
88
89	if (!strchr (name, ':'))
90	{
91	fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name);
92	fflush (stderr);
93	exit (1);
94	}
95	else
96	{
97	char *port_str;
98	int port;
99	struct sockaddr_in sockaddr;
100	int tmp;
101	struct protoent *protoent;
102	int tmp_desc;
103
104	port_str = strchr (name, ':');
105
106	port = atoi (port_str + 1);
107
108	tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
109	if (tmp_desc < 0)
110	perror_with_name ("Can't open socket");
111
112	/* Allow rapid reuse of this port. */
113	tmp = 1;
114	setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *)&tmp,
115	sizeof(tmp));
116
117	sockaddr.sin_family = PF_INET;
118	sockaddr.sin_port = htons(port);
119	sockaddr.sin_addr.s_addr = INADDR_ANY;
120
121	if (bind (tmp_desc, (struct sockaddr *)&sockaddr, sizeof (sockaddr))
122	\|\| listen (tmp_desc, 1))
123	perror_with_name ("Can't bind address");
124
125	tmp = sizeof (sockaddr);
126	remote_desc = accept (tmp_desc, (struct sockaddr *)&sockaddr, &tmp);
127	if (remote_desc == -1)
128	perror_with_name ("Accept failed");
129
130	protoent = getprotobyname ("tcp");
131	if (!protoent)
132	perror_with_name ("getprotobyname");
133
134	/* Enable TCP keep alive process. */
135	tmp = 1;
136	setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *)&tmp, sizeof(tmp));
137
138	/* Tell TCP not to delay small packets. This greatly speeds up
139	interactive response. */
140	tmp = 1;
141	setsockopt (remote_desc, protoent->p_proto, TCP_NODELAY,
142	(char *)&tmp, sizeof(tmp));
143
144	close (tmp_desc); /* No longer need this */
145
146	signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbreplay simply
147	exits when the remote side dies. */
148	}
149
150	fcntl (remote_desc, F_SETFL, FASYNC);
151
152	fprintf (stderr, "Replay logfile using %s\n", name);
153	fflush (stderr);
154	}
155
156	static int tohex (ch)
157	int ch;
158	{
159	if (ch >= '0' && ch <= '9')
160	{
161	return (ch - '0');
162	}
163	if (ch >= 'A' && ch <= 'F')
164	{
165	return (ch - 'A' + 10);
166	}
167	if (ch >= 'a' && ch <= 'f')
168	{
169	return (ch - 'a' + 10);
170	}
171	fprintf (stderr, "\nInvalid hex digit '%c'\n", ch);
172	fflush (stderr);
173	exit (1);
174	}
175
176	static int
177	logchar (fp)
178	FILE *fp;
179	{
180	int ch;
181	int ch2;
182
183	ch = fgetc (fp);
184	fputc (ch, stdout);
185	fflush (stdout);
186	switch (ch)
187	{
188	case '\n':
189	ch = EOL;
190	break;
191	case '\\':
192	ch = fgetc (fp);
193	fputc (ch, stdout);
194	fflush (stdout);
195	switch (ch)
196	{
197	case '\\': break;
198	case 'b': ch = '\b'; break;
199	case 'f': ch = '\f'; break;
200	case 'n': ch = '\n'; break;
201	case 'r': ch = '\r'; break;
202	case 't': ch = '\t'; break;
203	case 'v': ch = '\v'; break;
204	case 'x':
205	ch2 = fgetc (fp);
206	fputc (ch2, stdout);
207	fflush (stdout);
208	ch = tohex (ch2) << 4;
209	ch2 = fgetc (fp);
210	fputc (ch2, stdout);
211	fflush (stdout);
212	ch \|= tohex (ch2);
213	break;
214	default:
215	/* Treat any other char as just itself */
216	break;
217	}
218	default:
219	break;
220	}
221	return (ch);
222	}
223
224	/* Accept input from gdb and match with chars from fp (after skipping one
225	blank) up until a \n is read from fp (which is not matched) */
226
227	void
228	expect (fp)
229	FILE *fp;
230	{
231	int fromlog;
232	unsigned char fromgdb;
233
234	if ((fromlog = logchar (fp)) != ' ')
235	{
236	sync_error (fp, "Sync error during gdb read of leading blank", ' ',
237	fromlog);
238	}
239	do
240	{
241	fromlog = logchar (fp);
242	if (fromlog == EOL)
243	{
244	break;
245	}
246	read (remote_desc, &fromgdb, 1);
247	} while (fromlog == fromgdb);
248	if (fromlog != EOL)
249	{
250	sync_error (fp, "Sync error during read of gdb packet", fromlog,
251	fromgdb);
252	}
253	}
254
255	/* Play data back to gdb from fp (after skipping leading blank) up until a
256	\n is read from fp (which is discarded and not sent to gdb). */
257
258	void
259	play (fp)
260	FILE *fp;
261	{
262	int fromlog;
263	char ch;
264
265	if ((fromlog = logchar (fp)) != ' ')
266	{
267	sync_error (fp, "Sync error skipping blank during write to gdb", ' ',
268	fromlog);
269	}
270	while ((fromlog = logchar (fp)) != EOL)
271	{
272	ch = fromlog;
273	write (remote_desc, &ch, 1);
274	}
275	}
276
277	int
278	main (argc, argv)
279	int argc;
280	char *argv[];
281	{
282	FILE *fp;
283	int ch;
284
285	if (argc < 3)
286	{
287	fprintf (stderr, "Usage: gdbreplay <logfile> <host:port>\n");
288	fflush (stderr);
289	exit (1);
290	}
291	fp = fopen (argv[1], "r");
292	if (fp == NULL)
293	{
294	perror_with_name (argv[1]);
295	}
296	remote_open (argv[2]);
297	while ((ch = logchar (fp)) != EOF)
298	{
299	switch (ch)
300	{
301	case 'w':
302	/* data sent from gdb to gdbreplay, accept and match it */
303	expect (fp);
304	break;
305	case 'r':
306	/* data sent from gdbreplay to gdb, play it */
307	play (fp);
308	break;
309	case 'c':
310	/* Command executed by gdb */
311	while ((ch = logchar (fp)) != EOL);
312	break;
313	}
314	}
315	remote_close ();
316	exit (0);
317	}
318