Source/DebuggerConnection.m

   1 /*
   2  * MacGDBp
   3  * Copyright (c) 2002 - 2007, Blue Static <http://www.bluestatic.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it under the terms of the GNU
   6  * General Public License as published by the Free Software Foundation; either version 2 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
  10  * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with this program; if not,
  14  * write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  15  */
  16
  17 #import "DebuggerConnection.h"
  18
  19 @implementation DebuggerConnection
  20
  21 /**
  22  * Creates a new DebuggerConnection and initializes the socket from the given connection
  23  * paramters.
  24  */
  25 - (id)initWithPort: (int)port session: (NSString *)session
  26 {
  27         if (self = [super init])
  28         {
  29                 _port = port;
  30                 _session = [session retain];
  31                 _connected = NO;
  32
  33                 _windowController = [[DebuggerWindowController alloc] initWithConnection: self];
  34                 [[_windowController window] makeKeyAndOrderFront: self];
  35
  36                 // now that we have our host information, open the socket
  37                 _socket = [[SocketWrapper alloc] initWithPort: port];
  38                 [_socket setDelegate: self];
  39                 [_windowController setStatus: @"Connecting"];
  40                 [_socket connect];
  41
  42                 // clean up after ourselves
  43                 [[NSNotificationCenter defaultCenter] addObserver: self
  44                                                                                                  selector: @selector(applicationWillTerminate:)
  45                                                                                                          name: NSApplicationWillTerminateNotification
  46                                                                                                    object: NSApp];
  47         }
  48         return self;
  49 }
  50
  51 /**
  52  * Release ourselves when we're about to die
  53  */
  54 - (void)applicationWillTerminate: (NSNotification *)notif
  55 {
  56         [self release];
  57 }
  58
  59 /**
  60  * Releases all of the object's data members and closes the streams
  61  */
  62 - (void)dealloc
  63 {
  64         [_session release];
  65         [_socket release];
  66
  67         [super dealloc];
  68 }
  69
  70 /**
  71  * Gets the port number
  72  */
  73 - (int)port
  74 {
  75         return _port;
  76 }
  77
  78 /**
  79  * Gets the session name
  80  */
  81 - (NSString *)session
  82 {
  83         return _session;
  84 }
  85
  86 /**
  87  * Returns the name of the remote host
  88  */
  89 - (NSString *)remoteHost
  90 {
  91         if (!_connected)
  92         {
  93                 return @"(DISCONNECTED)";
  94         }
  95         return [_socket remoteHost];
  96 }
  97
  98 /**
  99  * SocketWrapper delegate method that is called whenever new data is received
 100  */
 101 - (void)dataReceived: (NSString *)response deliverTo: (SEL)selector
 102 {
 103         // if the caller of [_socket receive:] specified a deliverTo, just forward the message to them
 104         if (selector != nil)
 105         {
 106                 [self performSelector: selector withObject: response];
 107         }
 108 }
 109
 110 /**
 111  * SocketWrapper delegate method that is called after data is sent. This really
 112  * isn't useful for much.
 113  */
 114 - (void)dataSent: (NSString *)data
 115 {
 116         NSLog(@"send = %@", data);
 117 }
 118
 119 /**
 120  * Called by SocketWrapper after the connection is successful. This immediately calls
 121  * -[SocketWrapper receive] to clear the way for communication
 122  */
 123 - (void)socketDidAccept
 124 {
 125         _connected = YES;
 126         [_socket receive: @selector(_handshake:)];
 127 }
 128
 129 /**
 130  * Receives errors from the SocketWrapper and updates the display
 131  */
 132 - (void)errorEncountered: (NSError *)error
 133 {
 134         [_windowController setError: [error domain]];
 135 }
 136
 137 /**
 138  * The initial packet handshake. This allows us to set things like the title of the window
 139  * and glean information about hte server we are debugging
 140  */
 141 - (void)_handshake: (NSData *)packet
 142 {
 143         [self refreshStatus];
 144 }
 145
 146 /**
 147  * Handler used by dataReceived:deliverTo: for anytime the status command is issued. It sets
 148  * the window controller's status text
 149  */
 150 - (void)_updateStatus: (NSData *)packet
 151 {
 152         NSXMLDocument *doc = [[NSXMLDocument alloc] initWithData: packet options: NSXMLDocumentTidyXML error: nil];
 153         [_windowController setStatus: [[[[doc rootElement] attributeForName: @"status"] stringValue] capitalizedString]];
 154         [doc release];
 155 }
 156
 157 /**
 158  * Tells the debugger to continue running the script
 159  */
 160 - (void)run
 161 {
 162         [_socket send: [self _createCommand: @"run"]];
 163         [self refreshStatus];
 164 }
 165
 166 /**
 167  * Method that runs tells the debugger to give us its status. This will call _updateStatus
 168  * and will update the status text on the window
 169  */
 170 - (void)refreshStatus
 171 {
 172         [_socket send: [self _createCommand: @"status"]];
 173         [_socket receive: @selector(_updateStatus:)];
 174 }
 175
 176 /**
 177  * Tells the debugger to step into the current command.
 178  */
 179 // TODO: populate the stack trace and registers list
 180 - (void)stepIn
 181 {
 182         [_socket send: [self _createCommand: @"step_into"]];
 183         [_socket receive: nil];
 184         [self refreshStatus];
 185         [self updateStackTraceAndRegisters];
 186 }
 187
 188 /**
 189  * This function queries the debug server for the current stacktrace and all the registers on
 190  * level one. If a user then tries to expand past level one... TOOD: HOLY CRAP WHAT DO WE DO PAST LEVEL 1?
 191  */
 192 - (void)updateStackTraceAndRegisters
 193 {
 194         [_socket send: [self _createCommand: @"stack_get"]];
 195         [_socket receive: @selector(_stackReceived:)];
 196 }
 197
 198 /**
 199  * Called by the dataReceived delivery delegate. This updates the window controller's data
 200  * for the stack trace
 201  */
 202 - (void)_stackReceived: (NSData *)packet
 203 {
 204         NSXMLDocument *doc = [[NSXMLDocument alloc] initWithData: packet options: NSXMLDocumentTidyXML error: nil];
 205         NSArray *children = [[doc rootElement] children];
 206         NSMutableArray *stack = [NSMutableArray array];
 207         NSMutableDictionary *dict = [NSMutableDictionary dictionary];
 208         for (int i = 0; i < [children count]; i++)
 209         {
 210                 NSArray *attrs = [[children objectAtIndex: i] attributes];
 211                 for (int j = 0; j < [attrs count]; j++)
 212                 {
 213                         [dict setValue: [[attrs objectAtIndex: j] stringValue] forKey: [[attrs objectAtIndex: j] name]];
 214                 }
 215                 [stack addObject: dict];
 216                 dict = [NSMutableDictionary dictionary];
 217         }
 218         [_windowController setStack: stack];
 219 }
 220
 221 /**
 222  * Helper method to create a string command with the -i <session> automatically tacked on
 223  */
 224 - (NSString *)_createCommand: (NSString *)cmd
 225 {
 226         return [NSString stringWithFormat: @"%@ -i %@", cmd, _session];
 227 }
 228
 229 @end