mirror of
https://github.com/mozilla/gecko-dev.git
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498 lines
10 KiB
C++
498 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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// DebuggerChannel.cpp
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//
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// Scott M. Silver
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#include "DebuggerChannel.h"
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#include "prio.h"
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#include "prthread.h"
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#include "prlock.h"
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#ifdef assert
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#undef assert
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#endif
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#include <assert.h>
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#include <string.h>
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#include <ctype.h>
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void DebuggerStream::
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writeRequest(Int32 inRequest)
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{
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DebuggerMessageRequest msgRequest = { inRequest };
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writeDataRaw(&msgRequest, sizeof(msgRequest));
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}
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Int32 DebuggerStream::
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readRequest()
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{
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DebuggerMessageRequest msgRequest;
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readDataRaw(&msgRequest, sizeof(msgRequest));
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return (msgRequest.request);
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}
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void DebuggerStream::
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writeResponse(Int32 inStatus)
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{
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DebuggerMessageResponse msgResponse = { inStatus };
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writeDataRaw(&msgResponse, sizeof(msgResponse));
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}
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Int32 DebuggerStream::
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readResponse()
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{
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DebuggerMessageResponse msgResponse;
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readDataRaw(&msgResponse, sizeof(msgResponse));
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return (msgResponse.status);
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}
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void DebuggerStream::
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writeString(const char* inString)
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{
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writeData(inString, strlen(inString));
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}
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void DebuggerStream::
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writeDataRaw(const void* inData, Int32 inLength)
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{
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if (PR_Write(mFileDesc, inData, inLength) != inLength)
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trespass("comm channel dead");
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}
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void DebuggerStream::
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writeData(const void* inData, Int32 inLength)
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{
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if (PR_Write(mFileDesc, &inLength, 4) != 4)
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trespass("comm channel dead");
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if (PR_Write(mFileDesc, inData, inLength) != inLength)
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trespass("comm channel dead");
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}
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Int32 DebuggerStream::
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readLength()
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{
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Int32 length;
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readDataRaw(&length, 4);
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return length;
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}
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void DebuggerStream::
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readDataRaw(void* outData, Int32 inLength)
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{
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if (PR_Read(mFileDesc, outData, inLength) != inLength)
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trespass("comm channel dead");
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}
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void* DebuggerStream::
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readData()
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{
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Int32 len = readLength();
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void* data = (void*) new char[len];
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readDataRaw(data, len);
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return (data);
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}
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void DebuggerStream::
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writePtr(const void* inPtr)
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{
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char* buffer = PR_smprintf("%p", inPtr);
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writeString(buffer);
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PR_smprintf_free(buffer);
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}
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static PRPtrdiff
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convertAsciiToHex(const char* inString)
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{
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const char* lc = inString+strlen(inString); // point to '\0'
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PRPtrdiff value = 0;
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PRIntn multiplier = 0;
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while (--lc >= inString)
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{
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if (isdigit(*lc))
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value += ((*lc - 48) << multiplier);
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else if ((*lc >= 97) && (*lc <= 102))
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value += ((*lc - 87) << multiplier);
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else
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return (value); // bail
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multiplier += 4;
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}
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return (value);
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}
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char* DebuggerStream::
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readString()
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{
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Int32 len = readLength();
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char* data = new char[len+1];
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readDataRaw(data, len);
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data[len+1-1] = '\0'; // null terminate string
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return (data);
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}
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void* DebuggerStream::
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readPtr()
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{
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char* data = readString();
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void* rv;
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rv = (void*) convertAsciiToHex(data);
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delete[] data;
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return (rv);
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}
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bool DebuggerClientChannel::
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waitForAsyncRequest()
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{
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for (;;)
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{
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Int32 request = mAsync.readRequest();
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handleAsyncRequest(request);
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}
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return (true);
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}
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void DebuggerClientChannel::
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asyncRequestThread(void* inThisPtr)
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{
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DebuggerClientChannel* thisChannel = (DebuggerClientChannel*) inThisPtr;
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thisChannel->waitForAsyncRequest();
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}
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DebuggerClientChannel* DebuggerClientChannel::
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createClient()
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{
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PRFileDesc* async;
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PRFileDesc* sync;
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// specify loopback
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PRNetAddr netaddr;
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netaddr.inet.family = AF_INET;
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netaddr.inet.port = htons(kDebuggerPort);
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netaddr.inet.ip = htonl(0x7f000001); // 127.0.0.1
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if ((sync = PR_NewTCPSocket()) == NULL)
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return (0);
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if (PR_Connect(sync, &netaddr, PR_INTERVAL_NO_TIMEOUT) < 0)
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return (0);
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if ((async = PR_NewTCPSocket()) == NULL)
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return (0);
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if (PR_Connect(async, &netaddr, PR_INTERVAL_NO_TIMEOUT) < 0)
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return (0);
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DebuggerClientChannel* channel = new DebuggerClientChannel(sync, async);
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PRThread* thread;
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thread = PR_CreateThread(PR_USER_THREAD,
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&asyncRequestThread,
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channel,
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PR_PRIORITY_NORMAL,
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PR_GLOBAL_THREAD,
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PR_JOINABLE_THREAD,
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0);
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// if we can't create the async thread, this is failure
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if (!thread)
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{
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delete channel;
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return (0);
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}
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return (channel);
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}
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// Constructor locks the passed in lock
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// Destructor unlocks the lock.
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// Useful for a one line critical section
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class StLocker
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{
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PRLock* mLock;
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public:
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StLocker(PRLock* inLock) :
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mLock(inLock) { PR_Lock(mLock); }
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~StLocker()
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{
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PRStatus status = PR_Unlock(mLock);
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assert(status == PR_SUCCESS);
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}
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};
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char* DebuggerClientChannel::
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requestAddressToMethod(const void* inAddress, Int32& outOffset)
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{
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StLocker locker(mLock);
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mSync.writeRequest(kAddressToMethod);
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// now send the arguments (one hex address)
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mSync.writePtr(inAddress);
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Int32 response = mSync.readResponse();
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if (!response)
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{
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char *methodName = mSync.readString();
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outOffset = (Int32) mSync.readPtr();
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return (methodName);
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}
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return (NULL);
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}
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DebuggerClientChannel::
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DebuggerClientChannel(PRFileDesc* inSync, PRFileDesc* inAsync) :
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mSync(inSync),
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mAsync(inAsync),
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mCompLoadHandler(0)
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{
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mLock = PR_NewLock();
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assert(mLock);
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}
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void* DebuggerClientChannel::
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requestMethodToAddress(const char* inMethodName)
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{
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StLocker locker(mLock);
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mSync.writeRequest(kMethodToAddress);
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// now send the arguments (one hex address)
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mSync.writeString(inMethodName);
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Int32 response = mSync.readResponse();
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void* address = (response == 0) ? mSync.readPtr() : 0;
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return (address);
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}
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void DebuggerClientChannel::
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sendOneCharacterRequest(char inCharRequest)
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{
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StLocker locker(mLock);
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mSync.writeRequest((Int32) inCharRequest);
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}
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void DebuggerClientChannel::
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handleAsyncRequest(Int32 inRequest)
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{
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// method does not get run until
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if (inRequest == kNotifyMethodCompiledLoaded)
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{
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char* methodName = mAsync.readString();
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void* address = mAsync.readPtr();
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handleCompileOrLoadedMethod(methodName, address);
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delete [] methodName;
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mAsync.writeResponse(0);
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}
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else
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mAsync.writeResponse(-1);
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}
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Int32 DebuggerClientChannel::
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requestNotifyOnMethodCompileLoad(const char* inMethodName)
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{
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StLocker locker(mLock);
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mSync.writeRequest(kRequestNotifyMethodCompiledLoaded);
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// now send the arguments (one string)
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mSync.writeString(inMethodName);
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return(mSync.readResponse());
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}
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Int32 DebuggerClientChannel::
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requestRunClass(const char* inClassName)
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{
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StLocker locker(mLock);
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mSync.writeRequest(kRunClass);
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// now send the arguments (one string)
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mSync.writeString(inClassName);
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return (mSync.readResponse());
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}
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Int32 DebuggerClientChannel::
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requestNotifyOnClassLoad(const char* inClassName)
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{
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StLocker locker(mLock);
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mSync.writeRequest(kNotifyOnClassLoad);
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// now send the arguments (one string)
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mSync.writeString(inClassName);
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return(mSync.readResponse());
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}
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Int32 DebuggerClientChannel::
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requestNotifyOnException(const char* inClassName)
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{
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StLocker locker(mLock);
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mSync.writeRequest(kNotifyOnException);
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// now send the arguments (one string)
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mSync.writeString(inClassName);
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return(mSync.readResponse());
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}
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void* DebuggerClientChannel::
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requestDebuggerThread()
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{
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StLocker locker(mLock);
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mSync.writeRequest(kRequestDebuggerThread);
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if (!mSync.readResponse())
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return (mSync.readPtr());
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else
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return (0);
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}
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#ifdef WIN32
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// The DLL entry-point function sets up shared memory using
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// a named file-mapping object.
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#include <windows.h>
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#include <memory.h>
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static DWORD* sThreadID = NULL; // pointer to shared memory
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BOOL WINAPI DllEntryPoint(HINSTANCE hinstDLL, // DLL module handle
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DWORD fdwReason, // reason called
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LPVOID lpvReserved) // reserved
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{
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HANDLE hMapObject = NULL; // handle to file mapping
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BOOL fInit, fIgnore;
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switch (fdwReason)
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{
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// The DLL is loading due to process
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// initialization or a call to LoadLibrary.
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case DLL_PROCESS_ATTACH:
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// Create a named file mapping object.
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hMapObject = CreateFileMapping(
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(HANDLE) 0xFFFFFFFF, // use paging file
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NULL, // no security attributes
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PAGE_READWRITE, // read/write access
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0, // size: high 32-bits
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sizeof(*sThreadID), // size: low 32-bits
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"debuggerThreadID"); // name of map object
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if (hMapObject == NULL)
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return FALSE;
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// The first process to attach initializes memory.
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fInit = (GetLastError() != ERROR_ALREADY_EXISTS);
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// Get a pointer to the file-mapped shared memory.
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sThreadID = (DWORD*) MapViewOfFile(
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hMapObject, // object to map view of
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FILE_MAP_WRITE, // read/write access
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0, // high offset: map from
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0, // low offset: beginning
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0); // default: map entire file
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if (sThreadID == NULL)
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return FALSE;
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// Initialize memory if this is the first process.
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if (fInit)
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memset(sThreadID, 0, sizeof(*sThreadID));
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break;
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// The attached process creates a new thread.
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case DLL_THREAD_ATTACH:
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break;
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// The thread of the attached process terminates.
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case DLL_THREAD_DETACH:
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break;
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// The DLL is unloading from a process due to
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// process termination or a call to FreeLibrary.
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case DLL_PROCESS_DETACH:
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// Unmap shared memory from the process's address space.
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fIgnore = UnmapViewOfFile(sThreadID);
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// Close the process's handle to the file-mapping object.
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fIgnore = CloseHandle(hMapObject);
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break;
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default:
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break;
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}
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return TRUE;
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UNREFERENCED_PARAMETER(hinstDLL);
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UNREFERENCED_PARAMETER(lpvReserved);
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}
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void setDebuggerThreadID(DWORD inThreadID)
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{
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*sThreadID = inThreadID;
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}
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DWORD getDebuggerThreadID()
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{
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return (*sThreadID);
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}
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#endif
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