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-rw-r--r--gdbserver/gdbreplay.cc532
1 files changed, 532 insertions, 0 deletions
diff --git a/gdbserver/gdbreplay.cc b/gdbserver/gdbreplay.cc
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--- /dev/null
+++ b/gdbserver/gdbreplay.cc
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+/* Replay a remote debug session logfile for GDB.
+ Copyright (C) 1996-2020 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 3 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, see <http://www.gnu.org/licenses/>. */
+
+#include "gdbsupport/common-defs.h"
+
+#undef PACKAGE
+#undef PACKAGE_NAME
+#undef PACKAGE_VERSION
+#undef PACKAGE_STRING
+#undef PACKAGE_TARNAME
+
+#include <config.h>
+#include "gdbsupport/version.h"
+
+#if HAVE_SYS_FILE_H
+#include <sys/file.h>
+#endif
+#if HAVE_SIGNAL_H
+#include <signal.h>
+#endif
+#include <ctype.h>
+#if HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#include <unistd.h>
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#if HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#if HAVE_NETINET_TCP_H
+#include <netinet/tcp.h>
+#endif
+
+#if USE_WIN32API
+#include <ws2tcpip.h>
+#endif
+
+#include "gdbsupport/netstuff.h"
+#include "gdbsupport/rsp-low.h"
+
+#ifndef HAVE_SOCKLEN_T
+typedef int socklen_t;
+#endif
+
+/* Sort of a hack... */
+#define EOL (EOF - 1)
+
+static int remote_desc;
+
+#ifdef __MINGW32CE__
+
+#ifndef COUNTOF
+#define COUNTOF(STR) (sizeof (STR) / sizeof ((STR)[0]))
+#endif
+
+#define errno (GetLastError ())
+
+char *
+strerror (DWORD error)
+{
+ static char buf[1024];
+ WCHAR *msgbuf;
+ DWORD lasterr = GetLastError ();
+ DWORD chars = FormatMessageW (FORMAT_MESSAGE_FROM_SYSTEM
+ | FORMAT_MESSAGE_ALLOCATE_BUFFER,
+ NULL,
+ error,
+ 0, /* Default language */
+ (LPVOID)&msgbuf,
+ 0,
+ NULL);
+ if (chars != 0)
+ {
+ /* If there is an \r\n appended, zap it. */
+ if (chars >= 2
+ && msgbuf[chars - 2] == '\r'
+ && msgbuf[chars - 1] == '\n')
+ {
+ chars -= 2;
+ msgbuf[chars] = 0;
+ }
+
+ if (chars > ((COUNTOF (buf)) - 1))
+ {
+ chars = COUNTOF (buf) - 1;
+ msgbuf [chars] = 0;
+ }
+
+ wcstombs (buf, msgbuf, chars + 1);
+ LocalFree (msgbuf);
+ }
+ else
+ sprintf (buf, "unknown win32 error (%ld)", error);
+
+ SetLastError (lasterr);
+ return buf;
+}
+
+#endif /* __MINGW32CE__ */
+
+static void
+sync_error (FILE *fp, const 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);
+}
+
+static void
+remote_error (const char *desc)
+{
+ fprintf (stderr, "\n%s\n", desc);
+ fflush (stderr);
+ exit (1);
+}
+
+static void
+remote_close (void)
+{
+#ifdef USE_WIN32API
+ closesocket (remote_desc);
+#else
+ close (remote_desc);
+#endif
+}
+
+/* Open a connection to a remote debugger.
+ NAME is the filename used for communication. */
+
+static void
+remote_open (char *name)
+{
+ char *last_colon = strrchr (name, ':');
+
+ if (last_colon == NULL)
+ {
+ fprintf (stderr, "%s: Must specify tcp connection as host:addr\n", name);
+ fflush (stderr);
+ exit (1);
+ }
+
+#ifdef USE_WIN32API
+ static int winsock_initialized;
+#endif
+ int tmp;
+ int tmp_desc;
+ struct addrinfo hint;
+ struct addrinfo *ainfo;
+
+ memset (&hint, 0, sizeof (hint));
+ /* Assume no prefix will be passed, therefore we should use
+ AF_UNSPEC. */
+ hint.ai_family = AF_UNSPEC;
+ hint.ai_socktype = SOCK_STREAM;
+ hint.ai_protocol = IPPROTO_TCP;
+
+ parsed_connection_spec parsed = parse_connection_spec (name, &hint);
+
+ if (parsed.port_str.empty ())
+ error (_("Missing port on hostname '%s'"), name);
+
+#ifdef USE_WIN32API
+ if (!winsock_initialized)
+ {
+ WSADATA wsad;
+
+ WSAStartup (MAKEWORD (1, 0), &wsad);
+ winsock_initialized = 1;
+ }
+#endif
+
+ int r = getaddrinfo (parsed.host_str.c_str (), parsed.port_str.c_str (),
+ &hint, &ainfo);
+
+ if (r != 0)
+ {
+ fprintf (stderr, "%s:%s: cannot resolve name: %s\n",
+ parsed.host_str.c_str (), parsed.port_str.c_str (),
+ gai_strerror (r));
+ fflush (stderr);
+ exit (1);
+ }
+
+ scoped_free_addrinfo free_ainfo (ainfo);
+
+ struct addrinfo *p;
+
+ for (p = ainfo; p != NULL; p = p->ai_next)
+ {
+ tmp_desc = socket (p->ai_family, p->ai_socktype, p->ai_protocol);
+
+ if (tmp_desc >= 0)
+ break;
+ }
+
+ if (p == NULL)
+ perror_with_name ("Cannot open socket");
+
+ /* Allow rapid reuse of this port. */
+ tmp = 1;
+ setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
+ sizeof (tmp));
+
+ switch (p->ai_family)
+ {
+ case AF_INET:
+ ((struct sockaddr_in *) p->ai_addr)->sin_addr.s_addr = INADDR_ANY;
+ break;
+ case AF_INET6:
+ ((struct sockaddr_in6 *) p->ai_addr)->sin6_addr = in6addr_any;
+ break;
+ default:
+ fprintf (stderr, "Invalid 'ai_family' %d\n", p->ai_family);
+ exit (1);
+ }
+
+ if (bind (tmp_desc, p->ai_addr, p->ai_addrlen) != 0)
+ perror_with_name ("Can't bind address");
+
+ if (p->ai_socktype == SOCK_DGRAM)
+ remote_desc = tmp_desc;
+ else
+ {
+ struct sockaddr_storage sockaddr;
+ socklen_t sockaddrsize = sizeof (sockaddr);
+ char orig_host[GDB_NI_MAX_ADDR], orig_port[GDB_NI_MAX_PORT];
+
+ if (listen (tmp_desc, 1) != 0)
+ perror_with_name ("Can't listen on socket");
+
+ remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr,
+ &sockaddrsize);
+
+ if (remote_desc == -1)
+ perror_with_name ("Accept failed");
+
+ /* 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, IPPROTO_TCP, TCP_NODELAY,
+ (char *) &tmp, sizeof (tmp));
+
+ if (getnameinfo ((struct sockaddr *) &sockaddr, sockaddrsize,
+ orig_host, sizeof (orig_host),
+ orig_port, sizeof (orig_port),
+ NI_NUMERICHOST | NI_NUMERICSERV) == 0)
+ {
+ fprintf (stderr, "Remote debugging from host %s, port %s\n",
+ orig_host, orig_port);
+ fflush (stderr);
+ }
+
+#ifndef USE_WIN32API
+ 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. */
+#else
+ closesocket (tmp_desc); /* No longer need this */
+#endif
+ }
+
+#if defined(F_SETFL) && defined (FASYNC)
+ fcntl (remote_desc, F_SETFL, FASYNC);
+#endif
+
+ fprintf (stderr, "Replay logfile using %s\n", name);
+ fflush (stderr);
+}
+
+static int
+logchar (FILE *fp)
+{
+ int ch;
+ int ch2;
+
+ ch = fgetc (fp);
+ if (ch != '\r')
+ {
+ fputc (ch, stdout);
+ fflush (stdout);
+ }
+ switch (ch)
+ {
+ /* Treat \r\n as a newline. */
+ case '\r':
+ ch = fgetc (fp);
+ if (ch == '\n')
+ ch = EOL;
+ else
+ {
+ ungetc (ch, fp);
+ ch = '\r';
+ }
+ fputc (ch == EOL ? '\n' : '\r', stdout);
+ fflush (stdout);
+ break;
+ 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 = fromhex (ch2) << 4;
+ ch2 = fgetc (fp);
+ fputc (ch2, stdout);
+ fflush (stdout);
+ ch |= fromhex (ch2);
+ break;
+ default:
+ /* Treat any other char as just itself */
+ break;
+ }
+ default:
+ break;
+ }
+ return (ch);
+}
+
+static int
+gdbchar (int desc)
+{
+ unsigned char fromgdb;
+
+ if (read (desc, &fromgdb, 1) != 1)
+ return -1;
+ else
+ return fromgdb;
+}
+
+/* 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) */
+
+static void
+expect (FILE *fp)
+{
+ int fromlog;
+ int 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;
+ fromgdb = gdbchar (remote_desc);
+ if (fromgdb < 0)
+ remote_error ("Error during read from gdb");
+ }
+ while (fromlog == fromgdb);
+
+ if (fromlog != EOL)
+ {
+ sync_error (fp, "Sync error during read of gdb packet from log", 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). */
+
+static void
+play (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;
+ if (write (remote_desc, &ch, 1) != 1)
+ remote_error ("Error during write to gdb");
+ }
+}
+
+static void
+gdbreplay_version (void)
+{
+ printf ("GNU gdbreplay %s%s\n"
+ "Copyright (C) 2020 Free Software Foundation, Inc.\n"
+ "gdbreplay is free software, covered by "
+ "the GNU General Public License.\n"
+ "This gdbreplay was configured as \"%s\"\n",
+ PKGVERSION, version, host_name);
+}
+
+static void
+gdbreplay_usage (FILE *stream)
+{
+ fprintf (stream, "Usage:\tgdbreplay LOGFILE HOST:PORT\n");
+ if (REPORT_BUGS_TO[0] && stream == stdout)
+ fprintf (stream, "Report bugs to \"%s\".\n", REPORT_BUGS_TO);
+}
+
+/* Main function. This is called by the real "main" function,
+ wrapped in a TRY_CATCH that handles any uncaught exceptions. */
+
+static void ATTRIBUTE_NORETURN
+captured_main (int argc, char *argv[])
+{
+ FILE *fp;
+ int ch;
+
+ if (argc >= 2 && strcmp (argv[1], "--version") == 0)
+ {
+ gdbreplay_version ();
+ exit (0);
+ }
+ if (argc >= 2 && strcmp (argv[1], "--help") == 0)
+ {
+ gdbreplay_usage (stdout);
+ exit (0);
+ }
+
+ if (argc < 3)
+ {
+ gdbreplay_usage (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);
+}
+
+int
+main (int argc, char *argv[])
+{
+ try
+ {
+ captured_main (argc, argv);
+ }
+ catch (const gdb_exception &exception)
+ {
+ if (exception.reason == RETURN_ERROR)
+ {
+ fflush (stdout);
+ fprintf (stderr, "%s\n", exception.what ());
+ }
+
+ exit (1);
+ }
+
+ gdb_assert_not_reached ("captured_main should never return");
+}
generated by cgit v1.1 at 2024-07-12 13:26:31 +0000