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// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the License "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// Purpose: The DProcessTracker object tracks which processes are being
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// debugged. The DProcessTracker class uses a DTargetProcess object for
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// each process being debugged.
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// Note: Although TheDProcessTracker object is a global, it will be unique
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// as only the Debug Security Server can load and use rm_debug.ldd.
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//
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//
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#include <e32def.h>
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#include <e32def_private.h>
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#include <e32cmn.h>
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#include <e32cmn_private.h>
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#include <kernel/kernel.h>
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#include <kernel/kern_priv.h>
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#include <rm_debug_api.h>
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#include "debug_logging.h"
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#include "d_process_tracker.h"
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#include "debug_utils.h"
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// Global Run-mode debugged process tracking object
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DProcessTracker TheDProcessTracker;
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// ctor
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DProcessTracker::DProcessTracker()
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{
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}
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/**
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* dtor
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* @internalTechnology
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*/
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DProcessTracker::~DProcessTracker()
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{
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// Forget about all the iProcesses
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iProcesses.ResetAndDestroy();
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}
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/**
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* @internalTechnology
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*
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* Creates and stores an internal mapping of debug agent to debugged process.
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* Note that an individual process may be mapped to a number of debug agents.
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*
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* @param aProcessName - The fullly qualified path of the debugged process. E.g. z:\sys\bin\hello_world.exe
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* @param aAgentId - The process id of the debug agent which is attaching to aProcessName, as returned by RProcess.Id()
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* @return KErrNone if there are no errors. KErrArgument if the processname is too long/short for a valid filepath.
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* KErrNoMemory if there is insufficient memory.
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*/
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TInt DProcessTracker::AttachProcess(const TDesC8& aProcessName,TUint64 aAgentId)
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{
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LOG_MSG("DProcessTracker::AttachProcess()");
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// Valid ProcessName?
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if (aProcessName.Length() < 1 || aProcessName.Length() >= KMaxPath)
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{
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return KErrArgument;
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}
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// Create an DTargetProcess to store
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DTargetProcess* tmpProcess = new DTargetProcess;
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if (tmpProcess == 0)
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{
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return KErrNoMemory;
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}
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LOG_MSG2(" AttachProcess: < new DTargetProcess=0x%08x", tmpProcess );
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// Set the name
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TInt err = KErrNone;
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err = tmpProcess->SetProcessName(aProcessName);
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if (err != KErrNone)
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{
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LOG_MSG2(" AttachProcess: < SetProcessName returned %d", err );
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return err;
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}
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// Is this process being debugged (ie already attached?)
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TInt index;
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TBool found = EFalse;
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TInt numberOfProcesses = iProcesses.Count();
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for(index=0; index<numberOfProcesses; index++)
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{
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const TPtr8& tmpPtr8(iProcesses[index]->ProcessName() );
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if ( tmpPtr8.CompareF(aProcessName) == 0)
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{
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LOG_MSG3(" Proc count=%d, found proc in iProcesses at %d. Count=%d",
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index, iProcesses.Count() );
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found = ETrue;
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break;
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}
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}
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if (found)
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{
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// Yes, it is being debugged
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// Add the agent to the list of agents for this process
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LOG_MSG3(" > AddAgent(agent id %d) to existing iProcesses[%d]", I64LOW(aAgentId), index );
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iProcesses[index]->AddAgent(aAgentId);
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return KErrNone;
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}
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else
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{
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// No, it is not being debugged
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// Add the agent to the list of agents for this process
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LOG_MSG2(" > AddAgent(agent %d) to new proc at index 0", I64LOW(aAgentId) );
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tmpProcess->AddAgent(aAgentId);
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// Add the process to the list of processes being debugged
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return iProcesses.Insert(tmpProcess,0);
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}
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}
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/**
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* @internalTechnology
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*
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* Removes a previously created mapping between a debug agent and a debugged process,
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* as created by AttachProcess.
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*
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* @param aProcessName - The fully qualified path of the debugged process. E.g. z:\sys\bin\hello_world.exe
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* @param aAgentId - The process id of the debug agent which is attaching to aProcessName, as returned by RProcess.Id()
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* @return KErrNone if there are no problems. KErrArgument if the processname is too long/short for a valid filepath.
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* KErrNotFound if the mapping does not exist (and therefore cannot be removed).
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*/
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TInt DProcessTracker::DetachProcess(const TDesC8& aProcessName, TUint64 aAgentId)
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{
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// Valid ProcessName?
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if (aProcessName.Length() < 1 || aProcessName.Length() >= KMaxPath)
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{
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return KErrArgument;
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};
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// Are we debugging this process?
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TInt i;
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TBool found = EFalse;
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DTargetProcess* foundProcess = 0;
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TInt numberOfProcesses = iProcesses.Count();
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for(i=0; i<numberOfProcesses; i++)
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{
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foundProcess = iProcesses[i];
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const TPtr8& tmpPtr8( foundProcess->ProcessName() );
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if ( tmpPtr8.CompareF(aProcessName) == 0)
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{
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found = ETrue;
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break;
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}
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}
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if (found == EFalse)
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{
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return KErrNotFound;
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}
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// remove the agent from the process
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iProcesses[i]->RemoveAgent(aAgentId);
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// Found it, are there any more attached agents, or suspended threads in the process?
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if ((iProcesses[i]->AgentCount() == 0) && !iProcesses[i]->HasSuspendedThreads() )
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{
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// Delete the process as no more agents are still attached
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delete iProcesses[i];
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// Remove the now obsolete pointer from our array.
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iProcesses.Remove(i);
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}
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return KErrNone;
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}
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/**
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* @internalTechnology
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*
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* Detachs a debug agent from every process being debugged. Used when a debug agent is being detached
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* from the debug security server and has not supplied a specific process name from which to detach.
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*/
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TInt DProcessTracker::DetachAgent(const TUint64 aAgentId)
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{
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// Remove this agent from all the processes being tracked.
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TInt numberOfProcesses = iProcesses.Count();
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for(TInt i=0; i<numberOfProcesses; i++)
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{
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// remove the agent from the process (we don't care about the return code)
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iProcesses[i]->RemoveAgent(aAgentId);
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}
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// Increment down through the array as we then don't have to worry about
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// missing entries which have been shifted after deletes.
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// The initial value of i correspnds to the index of the final element
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// in the array.
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for(TInt i = iProcesses.Count()-1; i>=0; i--)
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{
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if (iProcesses[i]->AgentCount() == 0)
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{
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// No agents remain for this process. Delete the
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// process object and remove the pointer from the array
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delete iProcesses[i];
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iProcesses.Remove(i);
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}
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}
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return KErrNone;
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}
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/**
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* @internalTechnology
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*
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* Returns a pointer to a DTargetProcess object representing the mapping of a debugged process
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* with all the relevant debug agents interested in that process, as determined
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* by AttachProcess.
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*
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* @param aProcessName - The fully qualified path of the debugged process. E.g. z:\sys\bin\hello_world.exe
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* @return DTargetProcess* pointer to an object representing the internal mapping of a process to all associated
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* debug agents. Returns 0 if the mapping cannot be found or the aProcessName is invalid.
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*/
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DTargetProcess* DProcessTracker::FindProcess(const TDesC8& aProcessName)
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{
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// Valid ProcessName?
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if (aProcessName.Length() < 1 || aProcessName.Length() >= KMaxPath)
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{
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return 0; // not found
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}
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// Can we find this in the array?
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TInt i;
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TBool found = EFalse;
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DTargetProcess* foundProcess = 0;
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TInt numberOfProcesses = iProcesses.Count();
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for(i=0; i<numberOfProcesses; i++)
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{
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foundProcess = iProcesses[i];
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const TPtr8& tmpPtr8( foundProcess->ProcessName() );
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if ( tmpPtr8.CompareF(aProcessName) == 0)
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{
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found = ETrue;
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break;
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}
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}
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if (found == EFalse)
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{
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LOG_EVENT_MSG("DProcessTracker::FindProcess, not found" );
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return 0; // not found
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}
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return foundProcess;
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}
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/**
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* @internalTechnology
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*
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* Returns a pointer to a DTargetProcess object representing the mapping of a debugged process
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* with all the relevant debug agents interested in that process, as determined
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* by AttachProcess.
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*
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* Note: This does not attempt an exact match, because the AddProcess event does not provide
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* a fully-qualified path, it provides something like [t_rmdebug_security0.exe].
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*
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* So for the purposes of dealing with this event, we need a "fuzzier" match which does not use the complete
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* path.
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*
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* @param aProcessName - The fully qualified path of the debugged process. E.g. z:\sys\bin\hello_world.exe
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* @return DTargetProcess* pointer to an object representing the internal mapping of a process to all associated
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* debug agents. Returns 0 if the mapping cannot be found or the aProcessName is invalid.
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*/
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DTargetProcess* DProcessTracker::FuzzyFindProcess(const TDesC8& aProcessName)
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{
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// Valid ProcessName?
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if (aProcessName.Length() < 1 || aProcessName.Length() >= KMaxPath)
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{
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return 0; // not found
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}
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// Can we find this in the array?
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TBool found = EFalse;
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DTargetProcess* foundProcess = 0;
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const TChar KBackSlash('\\');
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TInt numberOfProcesses = iProcesses.Count();
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for(TInt i=0; i < numberOfProcesses; i++)
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{
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foundProcess = iProcesses[i];
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TInt procListBackSlash = foundProcess->ProcessName().LocateReverse( KBackSlash );
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if( procListBackSlash == KErrNotFound )
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{
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procListBackSlash = 0;
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}
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else
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{
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//Now move to the char after the backlash
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procListBackSlash++;
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}
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TInt eventBackSlash = aProcessName.LocateReverse( KBackSlash );
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if( eventBackSlash == KErrNotFound )
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{
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eventBackSlash = 0;
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}
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else
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{
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//Now move to the char after the backlash
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eventBackSlash++;
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}
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if( ( procListBackSlash == 0 ) && ( eventBackSlash == 0 ) )
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{
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//There were no backslashes on either name, so no point in continuing
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break;
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}
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TPtrC8 eventCleanName( aProcessName.Mid( eventBackSlash ) );
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TPtrC8 procListCleanName( foundProcess->ProcessName().Mid( procListBackSlash ) );
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if ( eventCleanName.CompareF( procListCleanName ) == 0 )
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{
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LOG_MSG2("DProcessTracker::FuzzyFindProcess() found a match : process list[%d]", i );
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found = ETrue;
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break;
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}
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}
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if (found == EFalse)
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{
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return 0; // not found
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}
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return foundProcess;
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}
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TBool DProcessTracker::CheckSuspended(DThread* aTargetThread) const
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{
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//get the file name and return if NULL
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HBuf* name = GetFileName(aTargetThread);
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if(!name)
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{
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return EFalse;
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}
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//iterate through the processes trying to match the name, and check suspended if found
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TInt numberOfProcesses = iProcesses.Count();
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for(TInt i=0; i < numberOfProcesses; i++)
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{
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if(iProcesses[i]->ProcessName().CompareF(*name) == 0)
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{
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return iProcesses[i]->CheckSuspended(aTargetThread);
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}
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}
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//couldn't find the process so return EFalse
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return EFalse;
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}
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TBool DProcessTracker::CheckSuspended(const TUint64 aTargetThreadId) const
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{
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//get a handle to the thread and return false if it's NULL
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DThread* thread = DebugUtils::OpenThreadHandle(aTargetThreadId);
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if(!thread)
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{
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return EFalse;
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}
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//check if the thread's suspended and then close the thread handle and return
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TBool suspended = CheckSuspended(thread);
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thread->Close(NULL);
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return suspended;
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}
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/**
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Attempts to suspend the specified thread
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@param aTargetThread thread to suspend
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@return KErrNone on success, KErrAlreadyExists if the thread is already suspended,
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or one of the other system wide error codes
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*/
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TInt DProcessTracker::SuspendThread(DThread* aTargetThread, TBool aFreezeThread)
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{
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LOG_MSG3("DProcessTracker::SuspendThread() Requesting suspend for: 0x%08x, freeze thread: %d", aTargetThread->iId, aFreezeThread?1:0);
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//get the file name and return if NULL
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HBuf* name = GetFileName(aTargetThread);
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if(!name)
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{
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return KErrNotFound;
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}
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//iterate through the processes trying to match the name, try to suspend the thread if found
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TInt numberOfProcesses = iProcesses.Count();
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for(TInt i=0; i < numberOfProcesses; i++)
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{
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if(iProcesses[i]->ProcessName().CompareF(*name) == 0)
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{
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return iProcesses[i]->SuspendThread(aTargetThread, aFreezeThread);
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}
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}
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//couldn't find process so return error
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return KErrPermissionDenied;
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}
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void DProcessTracker::FSWait()
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{
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TInt numberOfProcesses = iProcesses.Count();
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for(TInt i=0; i < numberOfProcesses; i++)
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429 |
{
|
|
430 |
iProcesses[i]->FSWait();
|
|
431 |
}
|
|
432 |
}
|
|
433 |
|
|
434 |
/**
|
|
435 |
Attempts to resume the specified thread
|
|
436 |
|
|
437 |
@param aTargetThread thread to resume
|
|
438 |
|
|
439 |
@return KErrNone on success, KErrInUse if the thread is not suspended,
|
|
440 |
or one of the other system wide error codes
|
|
441 |
*/
|
|
442 |
TInt DProcessTracker::ResumeThread(DThread* aTargetThread)
|
|
443 |
{
|
|
444 |
LOG_MSG2("DProcessTracker::ResumeThread() Requesting resume for: 0x%08x", aTargetThread->iId);
|
|
445 |
|
|
446 |
//get the file name and return if NULL
|
|
447 |
HBuf* name = GetFileName(aTargetThread);
|
|
448 |
if(!name)
|
|
449 |
{
|
|
450 |
return KErrNotFound;
|
|
451 |
}
|
|
452 |
|
|
453 |
//iterate through the processes trying to match the name, try to resume the thread if found
|
|
454 |
TInt numberOfProcesses = iProcesses.Count();
|
|
455 |
for(TInt i=0; i < numberOfProcesses; i++)
|
|
456 |
{
|
|
457 |
if(iProcesses[i]->ProcessName().CompareF(*name) == 0)
|
|
458 |
{
|
|
459 |
return iProcesses[i]->ResumeThread(aTargetThread);
|
|
460 |
}
|
|
461 |
}
|
|
462 |
|
|
463 |
//couldn't find process so return error
|
|
464 |
return KErrPermissionDenied;
|
|
465 |
}
|
|
466 |
|
|
467 |
/**
|
|
468 |
Get a thread's originating file name
|
|
469 |
|
|
470 |
@param aThread the thread to get the file name for
|
|
471 |
|
|
472 |
@return a pointer to the thread's file name, if there are problems accessing
|
|
473 |
the file name then NULL will be returned
|
|
474 |
*/
|
|
475 |
HBuf* DProcessTracker::GetFileName(DThread* aThread) const
|
|
476 |
{
|
|
477 |
//check if the thread is NULL and return if so
|
|
478 |
if(!aThread)
|
|
479 |
{
|
|
480 |
return NULL;
|
|
481 |
}
|
|
482 |
|
|
483 |
//get the owning process and return if it is NULL
|
|
484 |
DProcess* process = aThread->iOwningProcess;
|
|
485 |
if(!process)
|
|
486 |
{
|
|
487 |
return NULL;
|
|
488 |
}
|
|
489 |
|
|
490 |
//get the process' code seg and return if it is NULL
|
|
491 |
DCodeSeg* codeSeg = process->iCodeSeg;
|
|
492 |
if(!codeSeg)
|
|
493 |
{
|
|
494 |
return NULL;
|
|
495 |
}
|
|
496 |
|
|
497 |
//return the code seg's stored file name (which could theoretically be NULL)
|
|
498 |
return codeSeg->iFileName;
|
|
499 |
}
|
|
500 |
|