diff -r a77889bee936 -r 647ab20fee2e kernel/eka/drivers/debug/rmdebug/d_process_tracker.cpp --- a/kernel/eka/drivers/debug/rmdebug/d_process_tracker.cpp Thu Aug 12 11:55:14 2010 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,500 +0,0 @@ -// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies). -// All rights reserved. -// This component and the accompanying materials are made available -// under the terms of the License "Eclipse Public License v1.0" -// which accompanies this distribution, and is available -// at the URL "http://www.eclipse.org/legal/epl-v10.html". -// -// Initial Contributors: -// Nokia Corporation - initial contribution. -// -// Contributors: -// -// Description: -// Purpose: The DProcessTracker object tracks which processes are being -// debugged. The DProcessTracker class uses a DTargetProcess object for -// each process being debugged. -// Note: Although TheDProcessTracker object is a global, it will be unique -// as only the Debug Security Server can load and use rm_debug.ldd. -// -// - -#include -#include -#include -#include -#include -#include - -#include -#include "debug_logging.h" -#include "d_process_tracker.h" -#include "debug_utils.h" - -// Global Run-mode debugged process tracking object -DProcessTracker TheDProcessTracker; - -// ctor -DProcessTracker::DProcessTracker() - { - } - -/** - * dtor - * @internalTechnology - */ -DProcessTracker::~DProcessTracker() - { - // Forget about all the iProcesses - iProcesses.ResetAndDestroy(); - } - -/** - * @internalTechnology - * - * Creates and stores an internal mapping of debug agent to debugged process. - * Note that an individual process may be mapped to a number of debug agents. - * - * @param aProcessName - The fullly qualified path of the debugged process. E.g. z:\sys\bin\hello_world.exe - * @param aAgentId - The process id of the debug agent which is attaching to aProcessName, as returned by RProcess.Id() - * @return KErrNone if there are no errors. KErrArgument if the processname is too long/short for a valid filepath. - * KErrNoMemory if there is insufficient memory. - */ -TInt DProcessTracker::AttachProcess(const TDesC8& aProcessName,TUint64 aAgentId) - { - LOG_MSG("DProcessTracker::AttachProcess()"); - - // Valid ProcessName? - if (aProcessName.Length() < 1 || aProcessName.Length() >= KMaxPath) - { - return KErrArgument; - } - - // Create an DTargetProcess to store - DTargetProcess* tmpProcess = new DTargetProcess; - if (tmpProcess == 0) - { - return KErrNoMemory; - } - LOG_MSG2(" AttachProcess: < new DTargetProcess=0x%08x", tmpProcess ); - - // Set the name - TInt err = KErrNone; - err = tmpProcess->SetProcessName(aProcessName); - if (err != KErrNone) - { - LOG_MSG2(" AttachProcess: < SetProcessName returned %d", err ); - return err; - } - - // Is this process being debugged (ie already attached?) - TInt index; - TBool found = EFalse; - - TInt numberOfProcesses = iProcesses.Count(); - for(index=0; indexProcessName() ); - - if ( tmpPtr8.CompareF(aProcessName) == 0) - { - LOG_MSG3(" Proc count=%d, found proc in iProcesses at %d. Count=%d", - index, iProcesses.Count() ); - found = ETrue; - break; - } - } - - if (found) - { - // Yes, it is being debugged - - // Add the agent to the list of agents for this process - LOG_MSG3(" > AddAgent(agent id %d) to existing iProcesses[%d]", I64LOW(aAgentId), index ); - - iProcesses[index]->AddAgent(aAgentId); - - return KErrNone; - } - else - { - // No, it is not being debugged - - // Add the agent to the list of agents for this process - LOG_MSG2(" > AddAgent(agent %d) to new proc at index 0", I64LOW(aAgentId) ); - - tmpProcess->AddAgent(aAgentId); - - // Add the process to the list of processes being debugged - return iProcesses.Insert(tmpProcess,0); - } - } - -/** - * @internalTechnology - * - * Removes a previously created mapping between a debug agent and a debugged process, - * as created by AttachProcess. - * - * @param aProcessName - The fully qualified path of the debugged process. E.g. z:\sys\bin\hello_world.exe - * @param aAgentId - The process id of the debug agent which is attaching to aProcessName, as returned by RProcess.Id() - * @return KErrNone if there are no problems. KErrArgument if the processname is too long/short for a valid filepath. - * KErrNotFound if the mapping does not exist (and therefore cannot be removed). - */ -TInt DProcessTracker::DetachProcess(const TDesC8& aProcessName, TUint64 aAgentId) - { - // Valid ProcessName? - if (aProcessName.Length() < 1 || aProcessName.Length() >= KMaxPath) - { - return KErrArgument; - }; - - // Are we debugging this process? - TInt i; - TBool found = EFalse; - DTargetProcess* foundProcess = 0; - - TInt numberOfProcesses = iProcesses.Count(); - for(i=0; iProcessName() ); - - if ( tmpPtr8.CompareF(aProcessName) == 0) - { - found = ETrue; - break; - } - } - - if (found == EFalse) - { - return KErrNotFound; - } - - // remove the agent from the process - iProcesses[i]->RemoveAgent(aAgentId); - - // Found it, are there any more attached agents, or suspended threads in the process? - if ((iProcesses[i]->AgentCount() == 0) && !iProcesses[i]->HasSuspendedThreads() ) - { - // Delete the process as no more agents are still attached - delete iProcesses[i]; - - // Remove the now obsolete pointer from our array. - iProcesses.Remove(i); - } - - return KErrNone; - } - -/** - * @internalTechnology - * - * Detachs a debug agent from every process being debugged. Used when a debug agent is being detached - * from the debug security server and has not supplied a specific process name from which to detach. - */ -TInt DProcessTracker::DetachAgent(const TUint64 aAgentId) - { - // Remove this agent from all the processes being tracked. - TInt numberOfProcesses = iProcesses.Count(); - for(TInt i=0; iRemoveAgent(aAgentId); - } - - // Increment down through the array as we then don't have to worry about - // missing entries which have been shifted after deletes. - // The initial value of i correspnds to the index of the final element - // in the array. - for(TInt i = iProcesses.Count()-1; i>=0; i--) - { - if (iProcesses[i]->AgentCount() == 0) - { - // No agents remain for this process. Delete the - // process object and remove the pointer from the array - delete iProcesses[i]; - iProcesses.Remove(i); - } - } - return KErrNone; - } - -/** - * @internalTechnology - * - * Returns a pointer to a DTargetProcess object representing the mapping of a debugged process - * with all the relevant debug agents interested in that process, as determined - * by AttachProcess. - * - * @param aProcessName - The fully qualified path of the debugged process. E.g. z:\sys\bin\hello_world.exe - * @return DTargetProcess* pointer to an object representing the internal mapping of a process to all associated - * debug agents. Returns 0 if the mapping cannot be found or the aProcessName is invalid. - */ -DTargetProcess* DProcessTracker::FindProcess(const TDesC8& aProcessName) - { - // Valid ProcessName? - if (aProcessName.Length() < 1 || aProcessName.Length() >= KMaxPath) - { - return 0; // not found - } - - // Can we find this in the array? - TInt i; - TBool found = EFalse; - DTargetProcess* foundProcess = 0; - - TInt numberOfProcesses = iProcesses.Count(); - for(i=0; iProcessName() ); - - if ( tmpPtr8.CompareF(aProcessName) == 0) - { - found = ETrue; - break; - } - } - - if (found == EFalse) - { - LOG_EVENT_MSG("DProcessTracker::FindProcess, not found" ); - return 0; // not found - } - - return foundProcess; - } - -/** - * @internalTechnology - * - * Returns a pointer to a DTargetProcess object representing the mapping of a debugged process - * with all the relevant debug agents interested in that process, as determined - * by AttachProcess. - * - * Note: This does not attempt an exact match, because the AddProcess event does not provide - * a fully-qualified path, it provides something like [t_rmdebug_security0.exe]. - * - * So for the purposes of dealing with this event, we need a "fuzzier" match which does not use the complete - * path. - * - * @param aProcessName - The fully qualified path of the debugged process. E.g. z:\sys\bin\hello_world.exe - * @return DTargetProcess* pointer to an object representing the internal mapping of a process to all associated - * debug agents. Returns 0 if the mapping cannot be found or the aProcessName is invalid. - */ -DTargetProcess* DProcessTracker::FuzzyFindProcess(const TDesC8& aProcessName) - { - // Valid ProcessName? - if (aProcessName.Length() < 1 || aProcessName.Length() >= KMaxPath) - { - return 0; // not found - } - - // Can we find this in the array? - TBool found = EFalse; - DTargetProcess* foundProcess = 0; - const TChar KBackSlash('\\'); - - TInt numberOfProcesses = iProcesses.Count(); - for(TInt i=0; i < numberOfProcesses; i++) - { - foundProcess = iProcesses[i]; - - TInt procListBackSlash = foundProcess->ProcessName().LocateReverse( KBackSlash ); - if( procListBackSlash == KErrNotFound ) - { - procListBackSlash = 0; - } - else - { - //Now move to the char after the backlash - procListBackSlash++; - } - - TInt eventBackSlash = aProcessName.LocateReverse( KBackSlash ); - if( eventBackSlash == KErrNotFound ) - { - eventBackSlash = 0; - } - else - { - //Now move to the char after the backlash - eventBackSlash++; - } - - if( ( procListBackSlash == 0 ) && ( eventBackSlash == 0 ) ) - { - //There were no backslashes on either name, so no point in continuing - break; - } - - TPtrC8 eventCleanName( aProcessName.Mid( eventBackSlash ) ); - TPtrC8 procListCleanName( foundProcess->ProcessName().Mid( procListBackSlash ) ); - - if ( eventCleanName.CompareF( procListCleanName ) == 0 ) - { - LOG_MSG2("DProcessTracker::FuzzyFindProcess() found a match : process list[%d]", i ); - found = ETrue; - break; - } - } - - if (found == EFalse) - { - return 0; // not found - } - - return foundProcess; - } - -TBool DProcessTracker::CheckSuspended(DThread* aTargetThread) const - { - //get the file name and return if NULL - HBuf* name = GetFileName(aTargetThread); - if(!name) - { - return EFalse; - } - - //iterate through the processes trying to match the name, and check suspended if found - TInt numberOfProcesses = iProcesses.Count(); - for(TInt i=0; i < numberOfProcesses; i++) - { - if(iProcesses[i]->ProcessName().CompareF(*name) == 0) - { - return iProcesses[i]->CheckSuspended(aTargetThread); - } - } - - //couldn't find the process so return EFalse - return EFalse; - } - -TBool DProcessTracker::CheckSuspended(const TUint64 aTargetThreadId) const - { - //get a handle to the thread and return false if it's NULL - DThread* thread = DebugUtils::OpenThreadHandle(aTargetThreadId); - if(!thread) - { - return EFalse; - } - - //check if the thread's suspended and then close the thread handle and return - TBool suspended = CheckSuspended(thread); - thread->Close(NULL); - return suspended; - } - -/** - Attempts to suspend the specified thread - - @param aTargetThread thread to suspend - - @return KErrNone on success, KErrAlreadyExists if the thread is already suspended, - or one of the other system wide error codes - */ -TInt DProcessTracker::SuspendThread(DThread* aTargetThread, TBool aFreezeThread) - { - LOG_MSG3("DProcessTracker::SuspendThread() Requesting suspend for: 0x%08x, freeze thread: %d", aTargetThread->iId, aFreezeThread?1:0); - - //get the file name and return if NULL - HBuf* name = GetFileName(aTargetThread); - if(!name) - { - return KErrNotFound; - } - - //iterate through the processes trying to match the name, try to suspend the thread if found - TInt numberOfProcesses = iProcesses.Count(); - for(TInt i=0; i < numberOfProcesses; i++) - { - if(iProcesses[i]->ProcessName().CompareF(*name) == 0) - { - return iProcesses[i]->SuspendThread(aTargetThread, aFreezeThread); - } - } - - //couldn't find process so return error - return KErrPermissionDenied; - } - -void DProcessTracker::FSWait() - { - TInt numberOfProcesses = iProcesses.Count(); - for(TInt i=0; i < numberOfProcesses; i++) - { - iProcesses[i]->FSWait(); - } - } - -/** - Attempts to resume the specified thread - - @param aTargetThread thread to resume - - @return KErrNone on success, KErrInUse if the thread is not suspended, - or one of the other system wide error codes - */ -TInt DProcessTracker::ResumeThread(DThread* aTargetThread) - { - LOG_MSG2("DProcessTracker::ResumeThread() Requesting resume for: 0x%08x", aTargetThread->iId); - - //get the file name and return if NULL - HBuf* name = GetFileName(aTargetThread); - if(!name) - { - return KErrNotFound; - } - - //iterate through the processes trying to match the name, try to resume the thread if found - TInt numberOfProcesses = iProcesses.Count(); - for(TInt i=0; i < numberOfProcesses; i++) - { - if(iProcesses[i]->ProcessName().CompareF(*name) == 0) - { - return iProcesses[i]->ResumeThread(aTargetThread); - } - } - - //couldn't find process so return error - return KErrPermissionDenied; - } - -/** - Get a thread's originating file name - - @param aThread the thread to get the file name for - - @return a pointer to the thread's file name, if there are problems accessing - the file name then NULL will be returned - */ -HBuf* DProcessTracker::GetFileName(DThread* aThread) const - { - //check if the thread is NULL and return if so - if(!aThread) - { - return NULL; - } - - //get the owning process and return if it is NULL - DProcess* process = aThread->iOwningProcess; - if(!process) - { - return NULL; - } - - //get the process' code seg and return if it is NULL - DCodeSeg* codeSeg = process->iCodeSeg; - if(!codeSeg) - { - return NULL; - } - - //return the code seg's stored file name (which could theoretically be NULL) - return codeSeg->iFileName; - } -