debugsrv/runmodedebug/rmdriver/src/rm_debug_eventhandler.cpp
author hgs
Fri, 27 Aug 2010 11:37:29 +0300
changeset 42 0ff24a8f6ca2
child 56 aa2539c91954
permissions -rw-r--r--
201033
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
42
hgs
parents:
diff changeset
     1
// Copyright (c) 2004-2010 Nokia Corporation and/or its subsidiary(-ies).
hgs
parents:
diff changeset
     2
// All rights reserved.
hgs
parents:
diff changeset
     3
// This component and the accompanying materials are made available
hgs
parents:
diff changeset
     4
// under the terms of the License "Eclipse Public License v1.0"
hgs
parents:
diff changeset
     5
// which accompanies this distribution, and is available
hgs
parents:
diff changeset
     6
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
hgs
parents:
diff changeset
     7
//
hgs
parents:
diff changeset
     8
// Initial Contributors:
hgs
parents:
diff changeset
     9
// Nokia Corporation - initial contribution.
hgs
parents:
diff changeset
    10
//
hgs
parents:
diff changeset
    11
// Contributors:
hgs
parents:
diff changeset
    12
//
hgs
parents:
diff changeset
    13
// Description:
hgs
parents:
diff changeset
    14
// Kernel Event handler for Run Mode Debug.
hgs
parents:
diff changeset
    15
//
hgs
parents:
diff changeset
    16
hgs
parents:
diff changeset
    17
#include <e32def.h>
hgs
parents:
diff changeset
    18
#include <e32def_private.h>
hgs
parents:
diff changeset
    19
#include <e32cmn.h>
hgs
parents:
diff changeset
    20
#include <e32cmn_private.h>
hgs
parents:
diff changeset
    21
#include <kernel/arm/arm.h>
hgs
parents:
diff changeset
    22
#include <kernel/kernel.h>
hgs
parents:
diff changeset
    23
#include <kernel/kern_priv.h>
hgs
parents:
diff changeset
    24
#include <nk_trace.h>
hgs
parents:
diff changeset
    25
hgs
parents:
diff changeset
    26
#include <rm_debug_api.h>
hgs
parents:
diff changeset
    27
#include "debug_logging.h"
hgs
parents:
diff changeset
    28
#include "d_process_tracker.h"
hgs
parents:
diff changeset
    29
#include "d_rmd_stepping.h"
hgs
parents:
diff changeset
    30
#include "rm_debug_kerneldriver.h"
hgs
parents:
diff changeset
    31
#include "rm_debug_driver.h"
hgs
parents:
diff changeset
    32
#include "rm_debug_eventhandler.h"
hgs
parents:
diff changeset
    33
hgs
parents:
diff changeset
    34
hgs
parents:
diff changeset
    35
DRM_DebugEventHandler::DRM_DebugEventHandler()
hgs
parents:
diff changeset
    36
	:	DKernelEventHandler(EventHandler, this)
hgs
parents:
diff changeset
    37
{
hgs
parents:
diff changeset
    38
	LOG_MSG("DRM_DebugEventHandler::DRM_DebugEventHandler()");
hgs
parents:
diff changeset
    39
hgs
parents:
diff changeset
    40
	for(TInt i=0; i<EEventLimit; i++)
hgs
parents:
diff changeset
    41
		{
hgs
parents:
diff changeset
    42
		iEventHandlers[i] = &DRM_DebugChannel::HandleUnsupportedEvent;
hgs
parents:
diff changeset
    43
		}
hgs
parents:
diff changeset
    44
	iEventHandlers[EEventUserTrace] = &DRM_DebugChannel::HandleUserTrace;
hgs
parents:
diff changeset
    45
	iEventHandlers[EEventRemoveLibrary] = &DRM_DebugChannel::RemoveLibrary;
hgs
parents:
diff changeset
    46
	iEventHandlers[EEventAddLibrary] = &DRM_DebugChannel::AddLibrary;
hgs
parents:
diff changeset
    47
	iEventHandlers[EEventStartThread] = &DRM_DebugChannel::StartThread;
hgs
parents:
diff changeset
    48
	iEventHandlers[EEventSwExc] = &DRM_DebugChannel::HandleSwException;
hgs
parents:
diff changeset
    49
	iEventHandlers[EEventHwExc] = &DRM_DebugChannel::HandleHwException;
hgs
parents:
diff changeset
    50
	iEventHandlers[EEventKillThread] = &DRM_DebugChannel::HandleEventKillThread;
hgs
parents:
diff changeset
    51
	iEventHandlers[EEventAddProcess] = &DRM_DebugChannel::HandleAddProcessEvent;
hgs
parents:
diff changeset
    52
	iEventHandlers[EEventRemoveProcess] = &DRM_DebugChannel::HandleRemoveProcessEvent;
hgs
parents:
diff changeset
    53
}
hgs
parents:
diff changeset
    54
hgs
parents:
diff changeset
    55
TInt DRM_DebugEventHandler::Create(DLogicalDevice* aDevice, DLogicalChannel* aChannel, DThread* aClient)
hgs
parents:
diff changeset
    56
{
hgs
parents:
diff changeset
    57
	LOG_MSG3("DRM_DebugEventHandler::Create(), aClientthread=0x%08x id=%d", aClient, aClient->iId);
hgs
parents:
diff changeset
    58
hgs
parents:
diff changeset
    59
	TInt err;
hgs
parents:
diff changeset
    60
	err = aDevice->Open();
hgs
parents:
diff changeset
    61
	if (err != KErrNone)
hgs
parents:
diff changeset
    62
		return err;
hgs
parents:
diff changeset
    63
	iDevice = aDevice;
hgs
parents:
diff changeset
    64
	
hgs
parents:
diff changeset
    65
	iChannel = (DRM_DebugChannel*)aChannel; //Don't add ref the channel, since channel closes the event handler before it ever gets destroyed.
hgs
parents:
diff changeset
    66
hgs
parents:
diff changeset
    67
	err = aClient->Open();
hgs
parents:
diff changeset
    68
	if (err != KErrNone)
hgs
parents:
diff changeset
    69
		return err;
hgs
parents:
diff changeset
    70
	iClientThread = aClient;
hgs
parents:
diff changeset
    71
hgs
parents:
diff changeset
    72
	// Use a semaphore to protect our data structures from concurrent access.
hgs
parents:
diff changeset
    73
	err = Kern::SemaphoreCreate(iProtectionLock, _L("RM_DebugEventHandlerLock"), 1 /* Initial count */);
hgs
parents:
diff changeset
    74
	if (err != KErrNone)
hgs
parents:
diff changeset
    75
		return err;
hgs
parents:
diff changeset
    76
hgs
parents:
diff changeset
    77
hgs
parents:
diff changeset
    78
	return Add();
hgs
parents:
diff changeset
    79
}
hgs
parents:
diff changeset
    80
hgs
parents:
diff changeset
    81
hgs
parents:
diff changeset
    82
DRM_DebugEventHandler::~DRM_DebugEventHandler()
hgs
parents:
diff changeset
    83
{
hgs
parents:
diff changeset
    84
	LOG_MSG("DRM_DebugEventHandler::~DRM_DebugEventHandler()");
hgs
parents:
diff changeset
    85
hgs
parents:
diff changeset
    86
	if (iProtectionLock)
hgs
parents:
diff changeset
    87
		iProtectionLock->Close(NULL);
hgs
parents:
diff changeset
    88
	
hgs
parents:
diff changeset
    89
	if (iDevice)
hgs
parents:
diff changeset
    90
		iDevice->Close(NULL);	
hgs
parents:
diff changeset
    91
	
hgs
parents:
diff changeset
    92
	if (iClientThread)
hgs
parents:
diff changeset
    93
		Kern::SafeClose((DObject*&)iClientThread, NULL);
hgs
parents:
diff changeset
    94
		
hgs
parents:
diff changeset
    95
}
hgs
parents:
diff changeset
    96
hgs
parents:
diff changeset
    97
hgs
parents:
diff changeset
    98
TInt DRM_DebugEventHandler::Start()
hgs
parents:
diff changeset
    99
{
hgs
parents:
diff changeset
   100
	LOG_MSG("DRM_DebugEventHandler::Start()");
hgs
parents:
diff changeset
   101
hgs
parents:
diff changeset
   102
	iTracking = ETrue;
hgs
parents:
diff changeset
   103
hgs
parents:
diff changeset
   104
	return KErrNone;
hgs
parents:
diff changeset
   105
}
hgs
parents:
diff changeset
   106
hgs
parents:
diff changeset
   107
hgs
parents:
diff changeset
   108
TInt DRM_DebugEventHandler::Stop()
hgs
parents:
diff changeset
   109
{
hgs
parents:
diff changeset
   110
	LOG_MSG("DRM_DebugEventHandler::Stop()");
hgs
parents:
diff changeset
   111
hgs
parents:
diff changeset
   112
	iTracking = EFalse;
hgs
parents:
diff changeset
   113
hgs
parents:
diff changeset
   114
	return KErrNone;
hgs
parents:
diff changeset
   115
}
hgs
parents:
diff changeset
   116
hgs
parents:
diff changeset
   117
hgs
parents:
diff changeset
   118
TUint DRM_DebugEventHandler::EventHandler(TKernelEvent aType, TAny* a1, TAny* a2, TAny* aThis)
hgs
parents:
diff changeset
   119
{
hgs
parents:
diff changeset
   120
	return ((DRM_DebugEventHandler*)aThis)->HandleEvent(aType, a1, a2);
hgs
parents:
diff changeset
   121
}
hgs
parents:
diff changeset
   122
hgs
parents:
diff changeset
   123
hgs
parents:
diff changeset
   124
hgs
parents:
diff changeset
   125
TUint DRM_DebugEventHandler::HandleEvent(TKernelEvent aType, TAny* a1, TAny* a2)
hgs
parents:
diff changeset
   126
	{
hgs
parents:
diff changeset
   127
	
hgs
parents:
diff changeset
   128
	/*
hgs
parents:
diff changeset
   129
	 * Check if we are tracking things at all OR 
hgs
parents:
diff changeset
   130
	 * this event is beyond the limit of known events OR 
hgs
parents:
diff changeset
   131
	 * this event is from the debug thread itself (don't want to debug ourselves) OR
hgs
parents:
diff changeset
   132
	 * this event has a handler (there is no point in proceeding without a handler)
hgs
parents:
diff changeset
   133
	 */
hgs
parents:
diff changeset
   134
	if( (!iTracking) || 
hgs
parents:
diff changeset
   135
			(aType > (TUint32)EEventLimit) ||
hgs
parents:
diff changeset
   136
			(iClientThread == &Kern::CurrentThread()) ||
hgs
parents:
diff changeset
   137
	    (iEventHandlers[aType] == &DRM_DebugChannel::HandleUnsupportedEvent) )
hgs
parents:
diff changeset
   138
		{
hgs
parents:
diff changeset
   139
		return ERunNext;
hgs
parents:
diff changeset
   140
		}
hgs
parents:
diff changeset
   141
	
hgs
parents:
diff changeset
   142
	return HandleSpecificEvent(aType,a1,a2) && aType == EEventHwExc ? EExcHandled : ERunNext;
hgs
parents:
diff changeset
   143
hgs
parents:
diff changeset
   144
hgs
parents:
diff changeset
   145
	}
hgs
parents:
diff changeset
   146
hgs
parents:
diff changeset
   147
TBool DRM_DebugEventHandler::HandleSpecificEvent(TKernelEvent aType, TAny* a1, TAny* a2)
hgs
parents:
diff changeset
   148
	{
hgs
parents:
diff changeset
   149
	TBool ret = EFalse;
hgs
parents:
diff changeset
   150
hgs
parents:
diff changeset
   151
	NKern::ThreadEnterCS();
hgs
parents:
diff changeset
   152
	LockDataAccess();
hgs
parents:
diff changeset
   153
hgs
parents:
diff changeset
   154
hgs
parents:
diff changeset
   155
	if (iChannel)
hgs
parents:
diff changeset
   156
		{
hgs
parents:
diff changeset
   157
		ret = (iChannel->*(iEventHandlers[aType]))(a1, a2);
hgs
parents:
diff changeset
   158
		}
hgs
parents:
diff changeset
   159
	ReleaseDataAccess();
hgs
parents:
diff changeset
   160
	NKern::ThreadLeaveCS();
hgs
parents:
diff changeset
   161
hgs
parents:
diff changeset
   162
	switch(aType)
hgs
parents:
diff changeset
   163
		{
hgs
parents:
diff changeset
   164
		case EEventHwExc:
hgs
parents:
diff changeset
   165
		case EEventKillThread:
hgs
parents:
diff changeset
   166
			{
hgs
parents:
diff changeset
   167
			LOG_MSG2("DRM_DebugEventHandler::HandleEvent() -> FSWait(), kernel event type: %d", (TUint32)aType);
hgs
parents:
diff changeset
   168
			TheDProcessTracker.FSWait();
hgs
parents:
diff changeset
   169
			LOG_MSG("DRM_DebugEventHandler::HandleEvent() <- FSWait()");
hgs
parents:
diff changeset
   170
			break;
hgs
parents:
diff changeset
   171
			}
hgs
parents:
diff changeset
   172
		default:
hgs
parents:
diff changeset
   173
			break;
hgs
parents:
diff changeset
   174
		}
hgs
parents:
diff changeset
   175
	return ret;
hgs
parents:
diff changeset
   176
	}
hgs
parents:
diff changeset
   177