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 "GDBpConnection.h"
22 #import "AppDelegate.h"
25 typedef enum _StackFrameComponents
30 } StackFrameComponent
;
32 // GDBpConnection (Private) ////////////////////////////////////////////////////
34 @interface GDBpConnection ()
35 @property (readwrite
, copy
) NSString
* status
;
36 @property (assign
) CFSocketRef socket
;
37 @property (assign
) CFReadStreamRef readStream
;
38 @property int lastReadTransaction
;
39 @property (retain
) NSMutableString
* currentPacket
;
40 @property (assign
) CFWriteStreamRef writeStream
;
41 @property int lastWrittenTransaction
;
42 @property (retain
) NSMutableArray
* queuedWrites
;
46 - (void)socketDidAccept
;
47 - (void)socketDisconnected
;
48 - (void)readStreamHasData
;
49 - (void)send
:(NSString
*)command
;
50 - (void)performSend
:(NSString
*)command
;
51 - (void)errorEncountered
:(NSString
*)error
;
53 - (void)handleResponse
:(NSXMLDocument
*)response
;
54 - (void)initReceived
:(NSXMLDocument
*)response
;
55 - (void)updateStatus
:(NSXMLDocument
*)response
;
56 - (void)debuggerStep
:(NSXMLDocument
*)response
;
57 - (void)rebuildStack
:(NSXMLDocument
*)response
;
58 - (void)getStackFrame
:(NSXMLDocument
*)response
;
59 - (void)handleRouted
:(NSArray
*)path response
:(NSXMLDocument
*)response
;
61 - (NSString
*)createCommand
:(NSString
*)cmd
, ...
;
62 - (NSString
*)createRouted
:(NSString
*)routingID command
:(NSString
*)cmd
, ...
;
64 - (void)sendQueuedWrites
;
66 - (StackFrame
*)createStackFrame
:(int)depth
;
67 - (NSString
*)escapedURIPath
:(NSString
*)path
;
70 // CFNetwork Callbacks /////////////////////////////////////////////////////////
72 void ReadStreamCallback(CFReadStreamRef stream
, CFStreamEventType eventType
, void* connectionRaw
)
74 GDBpConnection
* connection
= (GDBpConnection
*)connectionRaw
;
77 case kCFStreamEventHasBytesAvailable
:
78 NSLog(@
"About to read.");
79 [connection readStreamHasData
];
82 case kCFStreamEventErrorOccurred
:
84 CFErrorRef error
= CFReadStreamCopyError(stream
);
85 CFReadStreamUnscheduleFromRunLoop(stream
, CFRunLoopGetCurrent(), kCFRunLoopCommonModes
);
86 CFReadStreamClose(stream
);
88 [connection errorEncountered
:[[(NSError
*)error autorelease
] description
]];
92 case kCFStreamEventEndEncountered
:
93 CFReadStreamUnscheduleFromRunLoop(stream
, CFRunLoopGetCurrent(), kCFRunLoopCommonModes
);
94 CFReadStreamClose(stream
);
96 [connection socketDisconnected
];
101 void WriteStreamCallback(CFWriteStreamRef stream
, CFStreamEventType eventType
, void* connectionRaw
)
103 GDBpConnection
* connection
= (GDBpConnection
*)connectionRaw
;
106 case kCFStreamEventCanAcceptBytes
:
107 [connection sendQueuedWrites
];
110 case kCFStreamEventErrorOccurred
:
112 CFErrorRef error
= CFWriteStreamCopyError(stream
);
113 CFWriteStreamUnscheduleFromRunLoop(stream
, CFRunLoopGetCurrent(), kCFRunLoopCommonModes
);
114 CFWriteStreamClose(stream
);
116 [connection errorEncountered
:[[(NSError
*)error autorelease
] description
]];
120 case kCFStreamEventEndEncountered
:
121 CFWriteStreamUnscheduleFromRunLoop(stream
, CFRunLoopGetCurrent(), kCFRunLoopCommonModes
);
122 CFWriteStreamClose(stream
);
124 [connection socketDisconnected
];
129 void SocketAcceptCallback(CFSocketRef socket
,
130 CFSocketCallBackType callbackType
,
135 assert(callbackType
== kCFSocketAcceptCallBack
);
136 NSLog(@
"SocketAcceptCallback()");
138 GDBpConnection
* connection
= (GDBpConnection
*)connectionRaw
;
140 CFReadStreamRef readStream
;
141 CFWriteStreamRef writeStream
;
143 // Create the streams on the socket.
144 CFStreamCreatePairWithSocket(kCFAllocatorDefault
,
145 *(CFSocketNativeHandle
*)data
, // Socket handle.
146 &readStream
, // Read stream in-pointer.
147 &writeStream
); // Write stream in-pointer.
149 // Create struct to register callbacks for the stream.
150 CFStreamClientContext context
;
152 context.info
= connection
;
153 context.retain
= NULL
;
154 context.release
= NULL
;
155 context.copyDescription
= NULL
;
157 // Set the client of the read stream.
158 CFOptionFlags readFlags
=
159 kCFStreamEventOpenCompleted |
160 kCFStreamEventHasBytesAvailable |
161 kCFStreamEventErrorOccurred |
162 kCFStreamEventEndEncountered
;
163 if (CFReadStreamSetClient(readStream
, readFlags
, ReadStreamCallback
, &context
))
164 // Schedule in run loop to do asynchronous communication with the engine.
165 CFReadStreamScheduleWithRunLoop(readStream
, CFRunLoopGetCurrent(), kCFRunLoopCommonModes
);
169 // Open the stream now that it's scheduled on the run loop.
170 if (!CFReadStreamOpen(readStream
))
172 CFStreamError error
= CFReadStreamGetError(readStream
);
173 NSLog(@
"error! %@", error
);
177 // Set the client of the write stream.
178 CFOptionFlags writeFlags
=
179 kCFStreamEventOpenCompleted |
180 kCFStreamEventCanAcceptBytes |
181 kCFStreamEventErrorOccurred |
182 kCFStreamEventEndEncountered
;
183 if (CFWriteStreamSetClient(writeStream
, writeFlags
, WriteStreamCallback
, &context
))
184 // Schedule it in the run loop to receive error information.
185 CFWriteStreamScheduleWithRunLoop(writeStream
, CFRunLoopGetCurrent(), kCFRunLoopCommonModes
);
189 // Open the write stream.
190 if (!CFWriteStreamOpen(writeStream
))
192 CFStreamError error
= CFWriteStreamGetError(writeStream
);
193 NSLog(@
"error! %@", error
);
197 connection.readStream
= readStream
;
198 connection.writeStream
= writeStream
;
199 [connection socketDidAccept
];
202 // GDBpConnection //////////////////////////////////////////////////////////////
204 @implementation GDBpConnection
205 @synthesize socket
= socket_
;
206 @synthesize readStream
= readStream_
;
207 @synthesize lastReadTransaction
= lastReadTransaction_
;
208 @synthesize currentPacket
= currentPacket_
;
209 @synthesize writeStream
= writeStream_
;
210 @synthesize lastWrittenTransaction
= lastWrittenTransaction_
;
211 @synthesize queuedWrites
= queuedWrites_
;
213 @synthesize delegate
;
216 * Creates a new DebuggerConnection and initializes the socket from the given connection
219 - (id)initWithPort
:(int)aPort
221 if (self = [super init
])
226 [[BreakpointManager sharedManager
] setConnection
:self];
234 * Deallocates the object
239 self.currentPacket
= nil;
245 * Gets the port number
253 * Returns the name of the remote host
255 - (NSString
*)remoteHost
259 return @
"(DISCONNECTED)";
261 // TODO: Either impl or remove.
266 * Returns whether or not we have an active connection
274 * Called by SocketWrapper after the connection is successful. This immediately calls
275 * -[SocketWrapper receive] to clear the way for communication, though the information
276 * could be useful server information that we don't use right now.
278 - (void)socketDidAccept
282 stackFrames_
= [[NSMutableDictionary alloc
] init
];
283 self.queuedWrites
= [NSMutableArray array
];
284 writeQueueLock_
= [NSRecursiveLock
new];
288 * Receives errors from the SocketWrapper and updates the display
290 - (void)errorEncountered
:(NSString
*)error
292 [delegate errorEncountered
:error
];
296 * Reestablishes communication with the remote debugger so that a new connection doesn't have to be
297 * created every time you want to debug a page
302 self.status
= @
"Connecting";
307 * Creates an entirely new stack and returns it as an array of StackFrame objects.
309 - (NSArray
*)getCurrentStack
311 NSMutableArray
* stack
= [NSMutableArray array
];
312 NSLog(@
"NOTIMPLEMENTED(): %s", _cmd
);
317 * Tells the debugger to continue running the script. Returns the current stack frame.
321 [self send
:[self createCommand
:@
"run"]];
325 * Tells the debugger to step into the current command.
329 [self send
:[self createCommand
:@
"step_into"]];
333 * Tells the debugger to step out of the current context
337 [self send
:[self createCommand
:@
"step_out"]];
341 * Tells the debugger to step over the current function
345 [self send
:[self createCommand
:@
"step_over"]];
349 * Tells the debugger engine to get a specifc property. This also takes in the NSXMLElement
350 * that requested it so that the child can be attached.
352 - (NSArray
*)getProperty
:(NSString
*)property
354 [socket send
:[self createCommand
:[NSString stringWithFormat
:@
"property_get -n \"%@\"", property
]]];
356 NSXMLDocument
* doc
= [self processData
:[socket receive
]];
360 <property> <!-- this is the one we requested -->
361 <property ... /> <!-- these are what we want -->
366 // we now have to detach all the children so we can insert them into another document
367 NSXMLElement
* parent
= (NSXMLElement
*)[[doc rootElement
] childAtIndex
:0];
368 NSArray
* children
= [parent children
];
369 [parent setChildren
:nil];
373 #pragma mark Breakpoints
376 * Send an add breakpoint command
378 - (void)addBreakpoint
:(Breakpoint
*)bp
383 NSString
* file
= [self escapedURIPath
:[bp transformedPath
]];
384 NSString
* cmd
= [self createCommand
:[NSString stringWithFormat
:@
"breakpoint_set -t line -f %@ -n %i", file
, [bp line
]]];
386 NSXMLDocument
* info
= [self processData
:[socket receive
]];
387 [bp setDebuggerId
:[[[[info rootElement
] attributeForName
:@
"id"] stringValue
] intValue
]];
391 * Removes a breakpoint
393 - (void)removeBreakpoint
:(Breakpoint
*)bp
400 [socket send
:[self createCommand
:[NSString stringWithFormat
:@
"breakpoint_remove -d %i", [bp debuggerId
]]]];
404 #pragma mark Socket and Stream Callbacks
407 * Creates, connects to, and schedules a CFSocket.
411 // Pass ourselves to the callback so we don't have to use ugly globals.
412 CFSocketContext context
;
415 context.retain
= NULL
;
416 context.release
= NULL
;
417 context.copyDescription
= NULL
;
419 // Create the address structure.
420 struct sockaddr_in address
;
421 memset(&address
, 0, sizeof(address
));
422 address.sin_len
= sizeof(address
);
423 address.sin_family
= AF_INET
;
424 address.sin_port
= htons(port
);
425 address.sin_addr.s_addr
= htonl(INADDR_ANY
);
427 // Create the socket signature.
428 CFSocketSignature signature
;
429 signature.protocolFamily
= PF_INET
;
430 signature.socketType
= SOCK_STREAM
;
431 signature.protocol
= IPPROTO_TCP
;
432 signature.address
= (CFDataRef
)[NSData dataWithBytes
:&address length
:sizeof(address
)];
434 socket_
= CFSocketCreateWithSocketSignature(kCFAllocatorDefault
,
435 &signature
, // Socket signature.
436 kCFSocketAcceptCallBack
, // Callback types.
437 SocketAcceptCallback
, // Callout function pointer.
438 &context
); // Context to pass to callout.
441 [self errorEncountered
:@
"Could not open socket."];
445 // Allow old, yet-to-be recycled sockets to be reused.
447 setsockopt(CFSocketGetNative(socket_
), SOL_SOCKET
, SO_REUSEADDR
, &yes
, sizeof(BOOL));
449 // Schedule the socket on the run loop.
450 CFRunLoopSourceRef source
= CFSocketCreateRunLoopSource(kCFAllocatorDefault
, socket_
, 0);
451 CFRunLoopAddSource(CFRunLoopGetCurrent(), source
, kCFRunLoopCommonModes
);
454 self.status
= @
"Connecting";
458 * Closes a socket and releases the ref.
462 // The socket goes down, so do the streams, which clean themselves up.
463 CFSocketInvalidate(socket_
);
465 [stackFrames_ release
];
466 self.queuedWrites
= nil;
467 [writeQueueLock_ release
];
471 * Notification that the socket disconnected.
473 - (void)socketDisconnected
476 [delegate debuggerDisconnected
];
480 * Callback from the CFReadStream that there is data waiting to be read.
482 - (void)readStreamHasData
485 CFIndex bytesRead
= CFReadStreamRead(readStream_
, buffer
, 1024);
486 const char* charBuffer
= (const char*)buffer
;
488 // We haven't finished reading a packet, so just read more data in.
489 if (currentPacketIndex_
< packetSize_
)
491 [currentPacket_ appendFormat
:@
"%s", buffer
];
492 currentPacketIndex_
+= bytesRead
;
494 // Time to read a new packet.
497 // Read the message header: the size.
498 packetSize_
= atoi(charBuffer
);
499 currentPacketIndex_
= bytesRead
- strlen(charBuffer
);
500 self.currentPacket
= [NSMutableString stringWithFormat
:@
"%s", buffer
+ strlen(charBuffer
) + 1];
503 // We have finished reading the packet.
504 if (currentPacketIndex_
>= packetSize_
)
507 currentPacketIndex_
= 0;
509 // Test if we can convert it into an NSXMLDocument.
510 NSError
* error
= nil;
511 NSXMLDocument
* xmlTest
= [[NSXMLDocument alloc
] initWithXMLString
:currentPacket_ options
:NSXMLDocumentTidyXML error
:&error
];
514 NSLog(@
"Could not parse XML? --- %@", error
);
515 NSLog(@
"Error UserInfo: %@", [error userInfo
]);
516 NSLog(@
"This is the XML Document: %@", currentPacket_
);
519 [self handleResponse
:[xmlTest autorelease
]];
524 * Writes a command into the write stream. If the stream is ready for writing,
525 * we do so immediately. If not, the command is queued and will be written
526 * when the stream is ready.
528 - (void)send
:(NSString
*)command
530 if (lastReadTransaction_
>= lastWrittenTransaction_
&& CFWriteStreamCanAcceptBytes(writeStream_
))
531 [self performSend
:command
];
533 [queuedWrites_ addObject
:command
];
537 * This performs a blocking send. This should ONLY be called when we know we
538 * have write access to the stream. We will busy wait in case we don't do a full
541 - (void)performSend
:(NSString
*)command
545 char* string
= (char*)[command UTF8String
];
546 int stringLength
= strlen(string
);
548 // Log the command if TransportDebug is enabled.
549 if ([[[[NSProcessInfo processInfo
] environment
] objectForKey
:@
"TransportDebug"] boolValue
])
550 NSLog(@
"--> %@", command
);
552 // Busy wait while writing. BAADD. Should background this operation.
555 if (CFWriteStreamCanAcceptBytes(writeStream_
))
557 // Include the NULL byte in the string when we write.
558 int bytesWritten
= CFWriteStreamWrite(writeStream_
, (UInt8
*)string
, stringLength
+ 1);
559 if (bytesWritten
< 0)
561 NSLog(@
"write error");
564 else if (bytesWritten
< strlen(string
))
566 // Adjust the buffer and wait for another chance to write.
567 stringLength
-= bytesWritten
;
568 memmove(string
, string
+ bytesWritten
, stringLength
);
574 // We need to scan the string to find the transactionID.
575 NSRange occurrence
= [command rangeOfString
:@
"-i "];
576 if (occurrence.location
== NSNotFound
)
578 NSLog(@
"sent %@ without a transaction ID", command
);
581 NSString
* transaction
= [command substringFromIndex
:occurrence.location
+ occurrence.length
];
582 lastWrittenTransaction_
= [transaction intValue
];
583 NSLog(@
"command = %@", command
);
584 NSLog(@
"read=%d, write=%d", lastReadTransaction_
, lastWrittenTransaction_
);
590 #pragma mark Response Handlers
592 - (void)handleResponse
:(NSXMLDocument
*)response
594 // Check and see if there's an error.
595 NSArray
* error
= [[response rootElement
] elementsForName
:@
"error"];
596 if ([error count
] > 0)
598 NSLog(@
"Xdebug error: %@", error
);
599 [delegate errorEncountered
:[[[[error objectAtIndex
:0] children
] objectAtIndex
:0] stringValue
]];
602 // If TransportDebug is enabled, log the response.
603 if ([[[[NSProcessInfo processInfo
] environment
] objectForKey
:@
"TransportDebug"] boolValue
])
604 NSLog(@
"<-- %@", response
);
606 // Get the name of the command from the engine's response.
607 NSString
* command
= [[[response rootElement
] attributeForName
:@
"command"] stringValue
];
608 NSString
* transaction
= [[[response rootElement
] attributeForName
:@
"transaction_id"] stringValue
];
609 NSArray
* routingPath
= [transaction componentsSeparatedByString
:@
"."];
611 NSInteger txnID
= [[routingPath objectAtIndex
:0] intValue
];
612 if (txnID
< lastReadTransaction_
)
613 NSLog(@
"out of date transaction %@", response
);
615 if (txnID
!= lastWrittenTransaction_
)
616 NSLog(@
"txn doesn't match last written %@", response
);
618 lastReadTransaction_
= [transaction intValue
];
619 NSLog(@
"read=%d, write=%d", lastReadTransaction_
, lastWrittenTransaction_
);
621 // Dispatch the command response to an appropriate handler.
622 if ([command isEqualToString
:@
"status"])
623 [self updateStatus
:response
];
624 else if ([command isEqualToString
:@
"run"] ||
[command isEqualToString
:@
"step_into"] ||
625 [command isEqualToString
:@
"step_over"] ||
[command isEqualToString
:@
"step_out"])
626 [self debuggerStep
:response
];
627 else if ([command isEqualToString
:@
"stack_depth"])
628 [self rebuildStack
:response
];
629 else if ([command isEqualToString
:@
"stack_get"])
630 [self getStackFrame
:response
];
631 else if ([routingPath count
] > 1)
632 [self handleRouted
:routingPath response
:response
];
633 else if ([[[response rootElement
] name
] isEqualToString
:@
"init"])
634 [self initReceived
:response
];
636 [self sendQueuedWrites
];
640 * Initial packet received. We've started a brand-new connection to the engine.
642 - (void)initReceived
:(NSXMLDocument
*)response
644 // Register any breakpoints that exist offline.
645 for (Breakpoint
* bp
in [[BreakpointManager sharedManager
] breakpoints
])
646 [self addBreakpoint
:bp
];
648 // Load the debugger to make it look active.
649 [delegate debuggerConnected
];
651 // TODO: update the status.
655 * Receiver for status updates. This just freshens up the UI.
657 - (void)updateStatus
:(NSXMLDocument
*)response
659 self.status
= [[[[response rootElement
] attributeForName
:@
"status"] stringValue
] capitalizedString
];
660 if (status
== nil ||
[status isEqualToString
:@
"Stopped"] ||
[status isEqualToString
:@
"Stopping"])
664 [delegate debuggerDisconnected
];
666 self.status
= @
"Stopped";
671 * Step in/out/over and run all take this path. We first get the status of the
672 * debugger and then request fresh stack information.
674 - (void)debuggerStep
:(NSXMLDocument
*)response
676 [self send
:[self createCommand
:@
"status"]];
677 NSString
* command
= [[[response rootElement
] attributeForName
:@
"command"] stringValue
];
678 NSUInteger routingID
= [[[[response rootElement
] attributeForName
:@
"transaction_id"] stringValue
] intValue
];
680 // If this is the run command, tell the delegate that a bunch of updates
681 // are coming. Also remove all existing stack routes and request a new stack.
682 if (YES ||
[command isEqualToString
:@
"run"])
684 //[delegate clobberStack];
685 [stackFrames_ removeAllObjects
];
686 [self send
:[self createCommand
:@
"stack_depth"]];
689 //[self send:[self createRouted:[NSString stringWithFormat:@"%u", routingID] command:@"stack_get -d 0"]];
693 * We ask for the stack_depth and now we clobber the stack and start rebuilding
696 - (void)rebuildStack
:(NSXMLDocument
*)response
698 NSInteger depth
= [[[[response rootElement
] attributeForName
:@
"depth"] stringValue
] intValue
];
700 // We now need to alloc a bunch of stack frames and get the basic information
702 for (NSInteger i
= 0; i
< depth
; i
++)
704 NSString
* command
= [self createCommand
:@
"stack_get -d %d", i
];
706 // Use the transaction ID to create a routing path.
707 NSNumber
* routingID
= [NSNumber numberWithInt
:transactionID
- 1];
708 [stackFrames_ setObject
:[StackFrame alloc
] forKey
:routingID
];
715 * The initial rebuild of the stack frame. We now have enough to initialize
716 * a StackFrame object.
718 - (void)getStackFrame
:(NSXMLDocument
*)response
720 // Get the routing information.
721 NSUInteger routingID
= [[[[response rootElement
] attributeForName
:@
"transaction_id"] stringValue
] intValue
];
722 NSNumber
* routingNumber
= [NSNumber numberWithInt
:routingID
];
724 // Make sure we initialized this frame in our last |-rebuildStack:|.
725 StackFrame
* frame
= [stackFrames_ objectForKey
:routingNumber
];
729 NSXMLElement
* xmlframe
= [[[response rootElement
] children
] objectAtIndex
:0];
731 // Initialize the stack frame.
732 [frame initWithIndex
:[[[xmlframe attributeForName
:@
"level"] stringValue
] intValue
]
733 withFilename
:[[xmlframe attributeForName
:@
"filename"] stringValue
]
735 atLine
:[[[xmlframe attributeForName
:@
"lineno"] stringValue
] intValue
]
736 inFunction
:[[xmlframe attributeForName
:@
"where"] stringValue
]
739 // Now that we have an initialized frame, request additional information.
740 NSString
* routingFormat
= @
"%u.%d";
741 NSString
* routingPath
= nil;
743 // Get the source code of the file. Escape % in URL chars.
744 NSString
* escapedFilename
= [frame.filename stringByReplacingOccurrencesOfString
:@
"%" withString
:@
"%%"];
745 routingPath
= [NSString stringWithFormat
:routingFormat
, routingID
, kStackFrameSource
];
746 [self send
:[self createRouted
:routingPath command
:[NSString stringWithFormat
:@
"source -f %@", escapedFilename
]]];
748 // Get the names of all the contexts.
749 routingPath
= [NSString stringWithFormat
:routingFormat
, routingID
, kStackFrameContexts
];
750 [self send
:[self createRouted
:routingPath command
:@
"context_names -d %d", frame.index
]];
754 * Routed responses are currently only used in getting all the stack frame data.
756 - (void)handleRouted
:(NSArray
*)path response
:(NSXMLDocument
*)response
758 NSLog(@
"routed %@ = %@", path
, response
);
760 // Format of |path|: transactionID.routingID.component
761 StackFrameComponent component
= [[path objectAtIndex
:2] intValue
];
763 // See if we can find the stack frame based on routingID.
764 NSNumber
* routingNumber
= [NSNumber numberWithInt
:[[path objectAtIndex
:1] intValue
]];
765 StackFrame
* frame
= [stackFrames_ objectForKey
:routingNumber
];
769 if (component
== kStackFrameSource
)
770 frame.source
= [[response rootElement
] value
];
776 * Helper method to create a string command with the -i <transaction id> automatically tacked on. Takes
777 * a variable number of arguments and parses the given command with +[NSString stringWithFormat:]
779 - (NSString
*)createCommand
:(NSString
*)cmd
, ...
783 va_start(argList
, cmd
);
784 NSString
* format
= [[NSString alloc
] initWithFormat
:cmd arguments
:argList
]; // format the command
787 return [NSString stringWithFormat
:@
"%@ -i %d", [format autorelease
], transactionID
++];
791 * Helper to create a command string. This works a lot like |-createCommand:| but
792 * it also takes a routing ID, which is used to route response data to specific
795 - (NSString
*)createRouted
:(NSString
*)routingID command
:(NSString
*)cmd
, ...
798 va_start(argList
, cmd
);
799 NSString
* format
= [[NSString alloc
] initWithFormat
:cmd arguments
:argList
];
802 return [NSString stringWithFormat
:@
"%@ -i %d.%@", [format autorelease
], transactionID
++, routingID
];
806 * Checks if there are unsent commands in the |queuedWrites_| queue and sends
807 * them if it's OK to do so. This will not block.
809 - (void)sendQueuedWrites
811 [writeQueueLock_ lock
];
812 if (lastReadTransaction_
>= lastWrittenTransaction_
&& [queuedWrites_ count
] > 0)
814 NSString
* command
= [queuedWrites_ objectAtIndex
:0];
815 NSLog(@
"Sending queued write: %@", command
);
817 // We don't want to block because this is called from the main thread.
818 // |-performSend:| busy waits when the stream is not ready. Bail out
819 // before we do that becuase busy waiting is BAD.
820 if (CFWriteStreamCanAcceptBytes(writeStream_
))
822 [self performSend
:command
];
823 [queuedWrites_ removeObjectAtIndex
:0];
826 [writeQueueLock_ unlock
];
830 * Generates a stack frame for the given depth
832 - (StackFrame
*)createStackFrame
:(int)stackDepth
834 // get the names of all the contexts
835 [socket send
:[self createCommand
:@
"context_names -d 0"]];
836 NSXMLElement
* contextNames
= [[self processData
:[socket receive
]] rootElement
];
837 NSMutableArray
* variables
= [NSMutableArray array
];
838 for (NSXMLElement
* context
in [contextNames children
])
840 NSString
* name
= [[context attributeForName
:@
"name"] stringValue
];
841 int cid
= [[[context attributeForName
:@
"id"] stringValue
] intValue
];
843 // fetch the contexts
844 [socket send
:[self createCommand
:[NSString stringWithFormat
:@
"context_get -d %d -c %d", stackDepth
, cid
]]];
845 NSArray
* addVars
= [[[self processData
:[socket receive
]] rootElement
] children
];
846 if (addVars
!= nil && name
!= nil)
847 [variables addObjectsFromArray
:addVars
];
854 * Given a file path, this returns a file:// URI and escapes any spaces for the
857 - (NSString
*)escapedURIPath
:(NSString
*)path
859 // Custon GDBp paths are fine.
860 if ([[path substringToIndex
:4] isEqualToString
:@
"gdbp"])
863 // Create a temporary URL that will escape all the nasty characters.
864 NSURL
* url
= [NSURL fileURLWithPath
:path
];
865 NSString
* urlString
= [url absoluteString
];
867 // Remove the host because this is a file:// URL;
868 urlString
= [urlString stringByReplacingOccurrencesOfString
:[url host
] withString
:@
""];
870 // Escape % for use in printf-style NSString formatters.
871 urlString
= [urlString stringByReplacingOccurrencesOfString
:@
"%" withString
:@
"%%"];