3 * Copyright (c) 2007 - 2010, Blue Static <http://www.bluestatic.org>
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.
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.
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
17 #import <sys/socket.h>
18 #import <netinet/in.h>
20 #import "DebuggerConnection.h"
22 #import "AppDelegate.h"
24 // GDBpConnection (Private) ////////////////////////////////////////////////////
26 @interface DebuggerConnection ()
27 @property (readwrite
, copy
) NSString
* status
;
28 @property (assign
) CFSocketRef socket
;
29 @property (assign
) CFReadStreamRef readStream
;
30 @property NSUInteger lastReadTransaction
;
31 @property (retain
) NSMutableString
* currentPacket
;
32 @property (assign
) CFWriteStreamRef writeStream
;
33 @property NSUInteger lastWrittenTransaction
;
34 @property (retain
) NSMutableArray
* queuedWrites
;
38 - (void)socketDidAccept
;
39 - (void)socketDisconnected
;
40 - (void)readStreamHasData
;
41 - (void)send
:(NSString
*)command
;
42 - (void)performSend
:(NSString
*)command
;
43 - (void)errorEncountered
:(NSString
*)error
;
45 - (void)handleResponse
:(NSXMLDocument
*)response
;
46 - (void)initReceived
:(NSXMLDocument
*)response
;
47 - (void)updateStatus
:(NSXMLDocument
*)response
;
48 - (void)debuggerStep
:(NSXMLDocument
*)response
;
49 - (void)rebuildStack
:(NSXMLDocument
*)response
;
50 - (void)getStackFrame
:(NSXMLDocument
*)response
;
51 - (void)setSource
:(NSXMLDocument
*)response
;
52 - (void)contextsReceived
:(NSXMLDocument
*)response
;
53 - (void)variablesReceived
:(NSXMLDocument
*)response
;
54 - (void)propertiesReceived
:(NSXMLDocument
*)response
;
56 - (NSNumber
*)sendCommandWithCallback
:(SEL)callback format
:(NSString
*)format
, ...
;
58 - (void)sendQueuedWrites
;
60 - (NSString
*)escapedURIPath
:(NSString
*)path
;
61 - (NSInteger
)transactionIDFromResponse
:(NSXMLDocument
*)response
;
64 // CFNetwork Callbacks /////////////////////////////////////////////////////////
66 void ReadStreamCallback(CFReadStreamRef stream
, CFStreamEventType eventType
, void* connectionRaw
)
68 DebuggerConnection
* connection
= (DebuggerConnection
*)connectionRaw
;
71 case kCFStreamEventHasBytesAvailable
:
72 NSLog(@
"About to read.");
73 [connection readStreamHasData
];
76 case kCFStreamEventErrorOccurred
:
78 CFErrorRef error
= CFReadStreamCopyError(stream
);
79 CFReadStreamUnscheduleFromRunLoop(stream
, CFRunLoopGetCurrent(), kCFRunLoopCommonModes
);
80 CFReadStreamClose(stream
);
82 [connection errorEncountered
:[[(NSError
*)error autorelease
] description
]];
86 case kCFStreamEventEndEncountered
:
87 CFReadStreamUnscheduleFromRunLoop(stream
, CFRunLoopGetCurrent(), kCFRunLoopCommonModes
);
88 CFReadStreamClose(stream
);
90 [connection socketDisconnected
];
95 void WriteStreamCallback(CFWriteStreamRef stream
, CFStreamEventType eventType
, void* connectionRaw
)
97 DebuggerConnection
* connection
= (DebuggerConnection
*)connectionRaw
;
100 case kCFStreamEventCanAcceptBytes
:
101 [connection sendQueuedWrites
];
104 case kCFStreamEventErrorOccurred
:
106 CFErrorRef error
= CFWriteStreamCopyError(stream
);
107 CFWriteStreamUnscheduleFromRunLoop(stream
, CFRunLoopGetCurrent(), kCFRunLoopCommonModes
);
108 CFWriteStreamClose(stream
);
110 [connection errorEncountered
:[[(NSError
*)error autorelease
] description
]];
114 case kCFStreamEventEndEncountered
:
115 CFWriteStreamUnscheduleFromRunLoop(stream
, CFRunLoopGetCurrent(), kCFRunLoopCommonModes
);
116 CFWriteStreamClose(stream
);
118 [connection socketDisconnected
];
123 void SocketAcceptCallback(CFSocketRef socket
,
124 CFSocketCallBackType callbackType
,
129 assert(callbackType
== kCFSocketAcceptCallBack
);
130 NSLog(@
"SocketAcceptCallback()");
132 DebuggerConnection
* connection
= (DebuggerConnection
*)connectionRaw
;
134 CFReadStreamRef readStream
;
135 CFWriteStreamRef writeStream
;
137 // Create the streams on the socket.
138 CFStreamCreatePairWithSocket(kCFAllocatorDefault
,
139 *(CFSocketNativeHandle
*)data
, // Socket handle.
140 &readStream
, // Read stream in-pointer.
141 &writeStream
); // Write stream in-pointer.
143 // Create struct to register callbacks for the stream.
144 CFStreamClientContext context
;
146 context.info
= connection
;
147 context.retain
= NULL
;
148 context.release
= NULL
;
149 context.copyDescription
= NULL
;
151 // Set the client of the read stream.
152 CFOptionFlags readFlags
=
153 kCFStreamEventOpenCompleted |
154 kCFStreamEventHasBytesAvailable |
155 kCFStreamEventErrorOccurred |
156 kCFStreamEventEndEncountered
;
157 if (CFReadStreamSetClient(readStream
, readFlags
, ReadStreamCallback
, &context
))
158 // Schedule in run loop to do asynchronous communication with the engine.
159 CFReadStreamScheduleWithRunLoop(readStream
, CFRunLoopGetCurrent(), kCFRunLoopCommonModes
);
163 // Open the stream now that it's scheduled on the run loop.
164 if (!CFReadStreamOpen(readStream
))
166 CFStreamError error
= CFReadStreamGetError(readStream
);
167 NSLog(@
"error! %@", error
);
171 // Set the client of the write stream.
172 CFOptionFlags writeFlags
=
173 kCFStreamEventOpenCompleted |
174 kCFStreamEventCanAcceptBytes |
175 kCFStreamEventErrorOccurred |
176 kCFStreamEventEndEncountered
;
177 if (CFWriteStreamSetClient(writeStream
, writeFlags
, WriteStreamCallback
, &context
))
178 // Schedule it in the run loop to receive error information.
179 CFWriteStreamScheduleWithRunLoop(writeStream
, CFRunLoopGetCurrent(), kCFRunLoopCommonModes
);
183 // Open the write stream.
184 if (!CFWriteStreamOpen(writeStream
))
186 CFStreamError error
= CFWriteStreamGetError(writeStream
);
187 NSLog(@
"error! %@", error
);
191 connection.readStream
= readStream
;
192 connection.writeStream
= writeStream
;
193 [connection socketDidAccept
];
196 // GDBpConnection //////////////////////////////////////////////////////////////
198 @implementation DebuggerConnection
199 @synthesize socket
= socket_
;
200 @synthesize readStream
= readStream_
;
201 @synthesize lastReadTransaction
= lastReadTransaction_
;
202 @synthesize currentPacket
= currentPacket_
;
203 @synthesize writeStream
= writeStream_
;
204 @synthesize lastWrittenTransaction
= lastWrittenTransaction_
;
205 @synthesize queuedWrites
= queuedWrites_
;
207 @synthesize delegate
;
210 * Creates a new DebuggerConnection and initializes the socket from the given connection
213 - (id)initWithPort
:(NSUInteger
)aPort
215 if (self = [super init
])
220 [[BreakpointManager sharedManager
] setConnection
:self];
228 * Deallocates the object
233 self.currentPacket
= nil;
239 // Getters /////////////////////////////////////////////////////////////////////
243 * Gets the port number
251 * Returns the name of the remote host
253 - (NSString
*)remoteHost
257 return @
"(DISCONNECTED)";
259 // TODO: Either impl or remove.
264 * Returns whether or not we have an active connection
271 // Commands ////////////////////////////////////////////////////////////////////
272 #pragma mark Commands
275 * Reestablishes communication with the remote debugger so that a new connection doesn't have to be
276 * created every time you want to debug a page
281 self.status
= @
"Connecting";
286 * Tells the debugger to continue running the script. Returns the current stack frame.
290 [self sendCommandWithCallback
:@selector(debuggerStep
:) format
:@
"run"];
294 * Tells the debugger to step into the current command.
298 [self sendCommandWithCallback
:@selector(debuggerStep
:) format
:@
"step_into"];
302 * Tells the debugger to step out of the current context
306 [self sendCommandWithCallback
:@selector(debuggerStep
:) format
:@
"step_out"];
310 * Tells the debugger to step over the current function
314 [self sendCommandWithCallback
:@selector(debuggerStep
:) format
:@
"step_over"];
318 * Tells the debugger engine to get a specifc property. This also takes in the NSXMLElement
319 * that requested it so that the child can be attached.
321 - (NSInteger
)getProperty
:(NSString
*)property
323 [self sendCommandWithCallback
:@selector(propertiesReceived
:) format
:@
"property_get -n \"%@\"", property
];
326 // Breakpoint Management ///////////////////////////////////////////////////////
327 #pragma mark Breakpoints
330 * Send an add breakpoint command
332 - (void)addBreakpoint
:(Breakpoint
*)bp
337 NSString
* file
= [self escapedURIPath
:[bp transformedPath
]];
338 NSNumber
* transaction
= [self sendCommandWithCallback
:@selector(breakpointReceived
:)
339 format
:@
"breakpoint_set -t line -f %@ -n %i", file
, [bp line
]];
340 [callbackContext_ setObject
:bp forKey
:transaction
];
344 * Removes a breakpoint
346 - (void)removeBreakpoint
:(Breakpoint
*)bp
353 [self sendCommandWithCallback
:nil format
:@
"breakpoint_remove -d %i", [bp debuggerId
]];
357 // Socket and Stream Callbacks /////////////////////////////////////////////////
358 #pragma mark Callbacks
361 * Called by SocketWrapper after the connection is successful. This immediately calls
362 * -[SocketWrapper receive] to clear the way for communication, though the information
363 * could be useful server information that we don't use right now.
365 - (void)socketDidAccept
369 stackFrames_
= [[NSMutableDictionary alloc
] init
];
370 self.queuedWrites
= [NSMutableArray array
];
371 writeQueueLock_
= [NSRecursiveLock
new];
372 callTable_
= [NSMutableDictionary
new];
373 callbackContext_
= [NSMutableDictionary
new];
377 * Receives errors from the SocketWrapper and updates the display
379 - (void)errorEncountered
:(NSString
*)error
381 [delegate errorEncountered
:error
];
385 * Creates, connects to, and schedules a CFSocket.
389 // Pass ourselves to the callback so we don't have to use ugly globals.
390 CFSocketContext context
;
393 context.retain
= NULL
;
394 context.release
= NULL
;
395 context.copyDescription
= NULL
;
397 // Create the address structure.
398 struct sockaddr_in address
;
399 memset(&address
, 0, sizeof(address
));
400 address.sin_len
= sizeof(address
);
401 address.sin_family
= AF_INET
;
402 address.sin_port
= htons(port
);
403 address.sin_addr.s_addr
= htonl(INADDR_ANY
);
405 // Create the socket signature.
406 CFSocketSignature signature
;
407 signature.protocolFamily
= PF_INET
;
408 signature.socketType
= SOCK_STREAM
;
409 signature.protocol
= IPPROTO_TCP
;
410 signature.address
= (CFDataRef
)[NSData dataWithBytes
:&address length
:sizeof(address
)];
412 socket_
= CFSocketCreateWithSocketSignature(kCFAllocatorDefault
,
413 &signature
, // Socket signature.
414 kCFSocketAcceptCallBack
, // Callback types.
415 SocketAcceptCallback
, // Callout function pointer.
416 &context
); // Context to pass to callout.
419 [self errorEncountered
:@
"Could not open socket."];
423 // Allow old, yet-to-be recycled sockets to be reused.
425 setsockopt(CFSocketGetNative(socket_
), SOL_SOCKET
, SO_REUSEADDR
, &yes
, sizeof(BOOL));
427 // Schedule the socket on the run loop.
428 CFRunLoopSourceRef source
= CFSocketCreateRunLoopSource(kCFAllocatorDefault
, socket_
, 0);
429 CFRunLoopAddSource(CFRunLoopGetCurrent(), source
, kCFRunLoopCommonModes
);
432 self.status
= @
"Connecting";
436 * Closes a socket and releases the ref.
440 // The socket goes down, so do the streams, which clean themselves up.
441 CFSocketInvalidate(socket_
);
443 [stackFrames_ release
];
444 self.queuedWrites
= nil;
445 [writeQueueLock_ release
];
446 [callTable_ release
];
447 [callbackContext_ release
];
451 * Notification that the socket disconnected.
453 - (void)socketDisconnected
456 [delegate debuggerDisconnected
];
460 * Callback from the CFReadStream that there is data waiting to be read.
462 - (void)readStreamHasData
465 CFIndex bytesRead
= CFReadStreamRead(readStream_
, buffer
, 1024);
466 const char* charBuffer
= (const char*)buffer
;
468 // We haven't finished reading a packet, so just read more data in.
469 if (currentPacketIndex_
< packetSize_
)
471 currentPacketIndex_
+= bytesRead
;
472 CFStringRef bufferString
= CFStringCreateWithBytes(kCFAllocatorDefault
,
475 kCFStringEncodingUTF8
,
477 [self.currentPacket appendString
:(NSString
*)bufferString
];
478 CFRelease(bufferString
);
480 // Time to read a new packet.
483 // Read the message header: the size.
484 packetSize_
= atoi(charBuffer
);
485 currentPacketIndex_
= bytesRead
- strlen(charBuffer
);
486 CFStringRef bufferString
= CFStringCreateWithBytes(kCFAllocatorDefault
,
487 buffer
+ strlen(charBuffer
) + 1,
488 bytesRead
- strlen(charBuffer
) - 1,
489 kCFStringEncodingUTF8
,
491 self.currentPacket
= [NSMutableString stringWithString
:(NSString
*)bufferString
];
492 CFRelease(bufferString
);
495 // We have finished reading the packet.
496 if (currentPacketIndex_
>= packetSize_
)
499 currentPacketIndex_
= 0;
501 // Test if we can convert it into an NSXMLDocument.
502 NSError
* error
= nil;
503 NSXMLDocument
* xmlTest
= [[NSXMLDocument alloc
] initWithXMLString
:currentPacket_ options
:NSXMLDocumentTidyXML error
:&error
];
506 NSLog(@
"Could not parse XML? --- %@", error
);
507 NSLog(@
"Error UserInfo: %@", [error userInfo
]);
508 NSLog(@
"This is the XML Document: %@", currentPacket_
);
510 // We do not want to starve the write queue, so manually parse out the
512 NSRange location
= [currentPacket_ rangeOfString
:@
"transaction_id"];
513 if (location.location
!= NSNotFound
)
515 NSUInteger start
= location.location
+ location.length
;
516 NSUInteger end
= start
;
518 NSCharacterSet
* numericSet
= [NSCharacterSet decimalDigitCharacterSet
];
520 // Loop over the characters after the attribute name to extract the ID.
521 while (end
< [currentPacket_ length
])
523 unichar c
= [currentPacket_ characterAtIndex
:end
];
524 if ([numericSet characterIsMember
:c
])
526 // If this character is numeric, extend the range to substring.
533 // If this character is nonnumeric and we have nothing in the
534 // range, skip this character.
540 // We've moved past the numeric ID so we should stop searching.
546 // If we were able to extract the transaction ID, update the last read.
547 NSRange substringRange
= NSMakeRange(start
, end
- start
);
548 NSString
* transaction
= [currentPacket_ substringWithRange
:substringRange
];
549 if ([transaction length
])
551 lastReadTransaction_
= [transaction intValue
];
556 // Otherwise, assume +1 and hope it works.
557 ++lastReadTransaction_
;
560 [self handleResponse
:[xmlTest autorelease
]];
565 * Writes a command into the write stream. If the stream is ready for writing,
566 * we do so immediately. If not, the command is queued and will be written
567 * when the stream is ready.
569 - (void)send
:(NSString
*)command
571 if (lastReadTransaction_
>= lastWrittenTransaction_
&& CFWriteStreamCanAcceptBytes(writeStream_
))
572 [self performSend
:command
];
574 [queuedWrites_ addObject
:command
];
578 * This performs a blocking send. This should ONLY be called when we know we
579 * have write access to the stream. We will busy wait in case we don't do a full
582 - (void)performSend
:(NSString
*)command
586 char* string
= (char*)[command UTF8String
];
587 int stringLength
= strlen(string
);
589 // Log the command if TransportDebug is enabled.
590 if ([[[[NSProcessInfo processInfo
] environment
] objectForKey
:@
"TransportDebug"] boolValue
])
591 NSLog(@
"--> %@", command
);
593 // Busy wait while writing. BAADD. Should background this operation.
596 if (CFWriteStreamCanAcceptBytes(writeStream_
))
598 // Include the NULL byte in the string when we write.
599 int bytesWritten
= CFWriteStreamWrite(writeStream_
, (UInt8
*)string
, stringLength
+ 1);
600 if (bytesWritten
< 0)
602 NSLog(@
"write error");
605 else if (bytesWritten
< strlen(string
))
607 // Adjust the buffer and wait for another chance to write.
608 stringLength
-= bytesWritten
;
609 memmove(string
, string
+ bytesWritten
, stringLength
);
615 // We need to scan the string to find the transactionID.
616 NSRange occurrence
= [command rangeOfString
:@
"-i "];
617 if (occurrence.location
== NSNotFound
)
619 NSLog(@
"sent %@ without a transaction ID", command
);
622 NSString
* transaction
= [command substringFromIndex
:occurrence.location
+ occurrence.length
];
623 lastWrittenTransaction_
= [transaction intValue
];
624 NSLog(@
"command = %@", command
);
625 NSLog(@
"read=%d, write=%d", lastReadTransaction_
, lastWrittenTransaction_
);
631 - (void)handleResponse
:(NSXMLDocument
*)response
633 // Check and see if there's an error.
634 NSArray
* error
= [[response rootElement
] elementsForName
:@
"error"];
635 if ([error count
] > 0)
637 NSLog(@
"Xdebug error: %@", error
);
638 [delegate errorEncountered
:[[[[error objectAtIndex
:0] children
] objectAtIndex
:0] stringValue
]];
641 // If TransportDebug is enabled, log the response.
642 if ([[[[NSProcessInfo processInfo
] environment
] objectForKey
:@
"TransportDebug"] boolValue
])
643 NSLog(@
"<-- %@", response
);
645 // Get the name of the command from the engine's response.
646 NSInteger transaction
= [self transactionIDFromResponse
:response
];
647 if (transaction
< lastReadTransaction_
)
648 NSLog(@
"out of date transaction %@", response
);
650 if (transaction
!= lastWrittenTransaction_
)
651 NSLog(@
"txn doesn't match last written %@", response
);
653 lastReadTransaction_
= transaction
;
654 NSLog(@
"read=%d, write=%d", lastReadTransaction_
, lastWrittenTransaction_
);
656 if ([[[response rootElement
] name
] isEqualToString
:@
"init"])
658 [self initReceived
:response
];
662 NSString
* callbackStr
= [callTable_ objectForKey
:[NSNumber numberWithInt
:lastReadTransaction_
]];
665 SEL callback
= NSSelectorFromString(callbackStr
);
666 [self performSelector
:callback withObject
:response
];
669 [self sendQueuedWrites
];
672 // Specific Response Handlers //////////////////////////////////////////////////
673 #pragma mark Response Handlers
676 * Initial packet received. We've started a brand-new connection to the engine.
678 - (void)initReceived
:(NSXMLDocument
*)response
680 // Register any breakpoints that exist offline.
681 for (Breakpoint
* bp
in [[BreakpointManager sharedManager
] breakpoints
])
682 [self addBreakpoint
:bp
];
684 // Load the debugger to make it look active.
685 [delegate debuggerConnected
];
687 // TODO: update the status.
691 * Receiver for status updates. This just freshens up the UI.
693 - (void)updateStatus
:(NSXMLDocument
*)response
695 self.status
= [[[[response rootElement
] attributeForName
:@
"status"] stringValue
] capitalizedString
];
696 if (status
== nil ||
[status isEqualToString
:@
"Stopped"] ||
[status isEqualToString
:@
"Stopping"])
700 [delegate debuggerDisconnected
];
702 self.status
= @
"Stopped";
707 * Step in/out/over and run all take this path. We first get the status of the
708 * debugger and then request fresh stack information.
710 - (void)debuggerStep
:(NSXMLDocument
*)response
712 [self sendCommandWithCallback
:@selector(updateStatus
:) format
:@
"status"];
713 NSString
* command
= [[[response rootElement
] attributeForName
:@
"command"] stringValue
];
715 // If this is the run command, tell the delegate that a bunch of updates
716 // are coming. Also remove all existing stack routes and request a new stack.
717 // TODO: figure out if we can not clobber the stack every time.
718 if (YES ||
[command isEqualToString
:@
"run"])
720 if ([delegate respondsToSelector
:@selector(clobberStack
)])
721 [delegate clobberStack
];
722 [stackFrames_ removeAllObjects
];
723 stackFirstTransactionID_
= [[self sendCommandWithCallback
:@selector(rebuildStack
:) format
:@
"stack_depth"] intValue
];
728 * We ask for the stack_depth and now we clobber the stack and start rebuilding
731 - (void)rebuildStack
:(NSXMLDocument
*)response
733 NSInteger depth
= [[[[response rootElement
] attributeForName
:@
"depth"] stringValue
] intValue
];
735 if (stackFirstTransactionID_
== [self transactionIDFromResponse
:response
])
738 // We now need to alloc a bunch of stack frames and get the basic information
740 for (NSInteger i
= 0; i
< depth
; i
++)
742 // Use the transaction ID to create a routing path.
743 NSNumber
* routingID
= [self sendCommandWithCallback
:@selector(getStackFrame
:) format
:@
"stack_get -d %d", i
];
744 [stackFrames_ setObject
:[StackFrame alloc
] forKey
:routingID
];
749 * The initial rebuild of the stack frame. We now have enough to initialize
750 * a StackFrame object.
752 - (void)getStackFrame
:(NSXMLDocument
*)response
754 // Get the routing information.
755 NSInteger routingID
= [self transactionIDFromResponse
:response
];
756 if (routingID
< stackFirstTransactionID_
)
758 NSNumber
* routingNumber
= [NSNumber numberWithInt
:routingID
];
760 // Make sure we initialized this frame in our last |-rebuildStack:|.
761 StackFrame
* frame
= [stackFrames_ objectForKey
:routingNumber
];
765 NSXMLElement
* xmlframe
= [[[response rootElement
] children
] objectAtIndex
:0];
767 // Initialize the stack frame.
768 [frame initWithIndex
:[[[xmlframe attributeForName
:@
"level"] stringValue
] intValue
]
769 withFilename
:[[xmlframe attributeForName
:@
"filename"] stringValue
]
771 atLine
:[[[xmlframe attributeForName
:@
"lineno"] stringValue
] intValue
]
772 inFunction
:[[xmlframe attributeForName
:@
"where"] stringValue
]
775 // Get the source code of the file. Escape % in URL chars.
776 NSString
* escapedFilename
= [frame.filename stringByReplacingOccurrencesOfString
:@
"%" withString
:@
"%%"];
777 NSNumber
* transaction
= [self sendCommandWithCallback
:@selector(setSource
:) format
:@
"source -f %@", escapedFilename
];
778 [callbackContext_ setObject
:routingNumber forKey
:transaction
];
780 // Get the names of all the contexts.
781 transaction
= [self sendCommandWithCallback
:@selector(contextsReceived
:) format
:@
"context_names -d %d", frame.index
];
782 [callbackContext_ setObject
:routingNumber forKey
:transaction
];
784 if ([delegate respondsToSelector
:@selector(newStackFrame
:)])
785 [delegate newStackFrame
:frame
];
789 * Callback for setting the source of a file while rebuilding a specific stack
792 - (void)setSource
:(NSXMLDocument
*)response
794 NSNumber
* transaction
= [NSNumber numberWithInt
:[self transactionIDFromResponse
:response
]];
795 if ([transaction intValue
] < stackFirstTransactionID_
)
797 NSNumber
* routingNumber
= [callbackContext_ objectForKey
:transaction
];
801 [callbackContext_ removeObjectForKey
:transaction
];
802 StackFrame
* frame
= [stackFrames_ objectForKey
:routingNumber
];
806 frame.source
= [[response rootElement
] value
];
808 if ([delegate respondsToSelector
:@selector(sourceUpdated
:)])
809 [delegate sourceUpdated
:frame
];
813 * Enumerates all the contexts of a given stack frame. We then in turn get the
814 * contents of each one of these contexts.
816 - (void)contextsReceived
:(NSXMLDocument
*)response
818 // Get the stack frame's routing ID and use it again.
819 NSNumber
* receivedTransaction
= [NSNumber numberWithInt
:[self transactionIDFromResponse
:response
]];
820 if ([receivedTransaction intValue
] < stackFirstTransactionID_
)
822 NSNumber
* routingID
= [callbackContext_ objectForKey
:receivedTransaction
];
826 // Get the stack frame by the |routingID|.
827 StackFrame
* frame
= [stackFrames_ objectForKey
:routingID
];
829 NSXMLElement
* contextNames
= [response rootElement
];
830 for (NSXMLElement
* context
in [contextNames children
])
832 NSInteger cid
= [[[context attributeForName
:@
"id"] stringValue
] intValue
];
834 // Fetch each context's variables.
835 NSNumber
* transaction
= [self sendCommandWithCallback
:@selector(variablesReceived
:)
836 format
:@
"context_get -d %d -c %d", frame.index
, cid
];
837 [callbackContext_ setObject
:routingID forKey
:transaction
];
842 * Receives the variables from the context and attaches them to the stack frame.
844 - (void)variablesReceived
:(NSXMLDocument
*)response
846 // Get the stack frame's routing ID and use it again.
847 NSInteger transaction
= [self transactionIDFromResponse
:response
];
848 if (transaction
< stackFirstTransactionID_
)
850 NSNumber
* receivedTransaction
= [NSNumber numberWithInt
:transaction
];
851 NSNumber
* routingID
= [callbackContext_ objectForKey
:receivedTransaction
];
855 // Get the stack frame by the |routingID|.
856 StackFrame
* frame
= [stackFrames_ objectForKey
:routingID
];
858 NSMutableArray
* variables
= [NSMutableArray array
];
860 // Merge the frame's existing variables.
862 [variables addObjectsFromArray
:frame.variables
];
864 // Add these new variables.
865 NSArray
* addVariables
= [[response rootElement
] children
];
867 [variables addObjectsFromArray
:addVariables
];
869 frame.variables
= variables
;
873 * Callback from a |-getProperty:| request.
875 - (void)propertiesReceived
:(NSXMLDocument
*)response
877 NSInteger transaction
= [self transactionIDFromResponse
:response
];
881 <property> <!-- this is the one we requested -->
882 <property ... /> <!-- these are what we want -->
887 // Detach all the children so we can insert them into another document.
888 NSXMLElement
* parent
= (NSXMLElement
*)[[response rootElement
] childAtIndex
:0];
889 NSArray
* children
= [parent children
];
890 [parent setChildren
:nil];
892 [delegate receivedProperties
:children forTransaction
:transaction
];
896 * Callback for setting a breakpoint.
898 - (void)breakpointReceived
:(NSXMLDocument
*)response
900 NSNumber
* transaction
= [NSNumber numberWithInt
:[self transactionIDFromResponse
:response
]];
901 Breakpoint
* bp
= [callbackContext_ objectForKey
:transaction
];
905 [callbackContext_ removeObjectForKey
:callbackContext_
];
906 [bp setDebuggerId
:[[[[response rootElement
] attributeForName
:@
"id"] stringValue
] intValue
]];
912 * This will send a command to the debugger engine. It will append the
913 * transaction ID automatically. It accepts a NSString command along with a
914 * a variable number of arguments to substitute into the command, a la
915 * +[NSString stringWithFormat:]. Returns the transaction ID as a NSNumber.
917 - (NSNumber
*)sendCommandWithCallback
:(SEL)callback format
:(NSString
*)format
, ...
919 // Collect varargs and format command.
921 va_start(args
, format
);
922 NSString
* command
= [[NSString alloc
] initWithFormat
:format arguments
:args
];
925 NSNumber
* callbackKey
= [NSNumber numberWithInt
:transactionID
++];
927 [callTable_ setObject
:NSStringFromSelector(callback
) forKey
:callbackKey
];
929 [self send
:[NSString stringWithFormat
:@
"%@ -i %@", [command autorelease
], callbackKey
]];
935 * Checks if there are unsent commands in the |queuedWrites_| queue and sends
936 * them if it's OK to do so. This will not block.
938 - (void)sendQueuedWrites
940 [writeQueueLock_ lock
];
941 if (lastReadTransaction_
>= lastWrittenTransaction_
&& [queuedWrites_ count
] > 0)
943 NSString
* command
= [queuedWrites_ objectAtIndex
:0];
944 NSLog(@
"Sending queued write: %@", command
);
946 // We don't want to block because this is called from the main thread.
947 // |-performSend:| busy waits when the stream is not ready. Bail out
948 // before we do that becuase busy waiting is BAD.
949 if (CFWriteStreamCanAcceptBytes(writeStream_
))
951 [self performSend
:command
];
952 [queuedWrites_ removeObjectAtIndex
:0];
955 [writeQueueLock_ unlock
];
959 * Given a file path, this returns a file:// URI and escapes any spaces for the
962 - (NSString
*)escapedURIPath
:(NSString
*)path
964 // Custon GDBp paths are fine.
965 if ([[path substringToIndex
:4] isEqualToString
:@
"gdbp"])
968 // Create a temporary URL that will escape all the nasty characters.
969 NSURL
* url
= [NSURL fileURLWithPath
:path
];
970 NSString
* urlString
= [url absoluteString
];
972 // Remove the host because this is a file:// URL;
973 urlString
= [urlString stringByReplacingOccurrencesOfString
:[url host
] withString
:@
""];
975 // Escape % for use in printf-style NSString formatters.
976 urlString
= [urlString stringByReplacingOccurrencesOfString
:@
"%" withString
:@
"%%"];
981 * Returns the transaction_id from an NSXMLDocument.
983 - (NSInteger
)transactionIDFromResponse
:(NSXMLDocument
*)response
985 return [[[[response rootElement
] attributeForName
:@
"transaction_id"] stringValue
] intValue
];