// Copyright (c) 2008-2009 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:

// e32test\mmu\t_mmustress.cpp

// Stress test for memory management services performed by the kernel's memory model.

// 

//

/**

 @file

*/

#define __E32TEST_EXTENSION__

#include <e32test.h>

#include "u32std.h"

#include <u32hal.h>

#include <e32svr.h>

#include <dptest.h>

#include <e32def.h>

#include <e32def_private.h>

#include "d_memorytest.h"

TBool TRACE = 0;

LOCAL_D RTest test(_L("T_MMUSTRESS"));

TUint32 MemModelAttributes;

TUint32 MemModel;

TInt PageSize;

TInt PageMask;

#if !defined(__WINS__) && !defined(__X86__)

const TPtrC KMoveLddFileName=_L("D_PAGEMOVE.LDD");

RPageMove MoveLdd;

#endif

RMemoryTestLdd Ldd;

const TUint KNumTestChunks = 6;

RChunk Chunks[KNumTestChunks];

TInt Committed[KNumTestChunks] = {0}; // for each chunk, is the 'owned' region uncommited(0), commited(1) or mixed(-1)

class TNicePtr8 : public TPtr8 { public: TNicePtr8() : TPtr8(0,0) {} } ChunkPtr[KNumTestChunks];

const TUint KNumSlaveProcesses = 4;

RProcess Slaves[KNumSlaveProcesses];

TRequestStatus SlaveLogons[KNumSlaveProcesses];

TRequestStatus SlaveRendezvous[KNumSlaveProcesses];

TInt SlaveNumber = -1; // master process is slave -1

const TInt KLocalIpcBufferSize = 0x10000;

TUint8* LocalIpcBuffer = 0;

RSemaphore StartSemaphore;

//

// Random number generation

//

TUint32 RandomSeed;

TUint32 Random()

	{

	RandomSeed = RandomSeed*69069+1;

	return RandomSeed;

	}

TUint32 Random(TUint32 aRange)

	{

	return (TUint32)((TUint64(Random())*TUint64(aRange))>>32);

	}

void RandomInit(TUint32 aSeed)

	{

	RandomSeed = aSeed+(aSeed<<8)+(aSeed<<16)+(aSeed<<24);

	Random();

	Random();

	}

//

// Chunk utils

//

TBuf<KMaxKernelName> ChunkName(TInt aChunkNumber)

	{

	TBuf<KMaxKernelName> name;

	name.Format(_L("T_MMUSTRESS-Chunk%d"),aChunkNumber);

	return name;

	}

#ifdef __WINS__

TInt KChunkShift = 16;

#elif defined(__X86__)

TInt KChunkShift = 22;

#else

TInt KChunkShift = 20;

#endif

TInt ChunkSize(TInt aChunkNumber)

	{

	// biggest chunk (number 0) is big enough for each slave to own a region which is

	// 2 page tables ('chunks') in size...

	return (2*KNumSlaveProcesses)<<(KChunkShift-aChunkNumber);

	}

// check smallest chunk is less than 'chunk' size...

__ASSERT_COMPILE((2*KNumSlaveProcesses>>(KNumTestChunks-1))==0);

/* Memory region 'owned' by this slave process */

void ChunkOwnedRegion(TInt aChunkNumber,TInt& aOffset,TInt& aSize)

	{

	TInt size = ChunkSize(aChunkNumber)/KNumSlaveProcesses;

	aSize = size;

	aOffset = SlaveNumber*size;

	test_Equal(0,size&PageMask);

	}

void ChunkMarkRegion(TInt aChunkNumber,TInt aOffset,TInt aSize)

	{

	TInt pageSize = PageSize;

	TUint32 mark = aOffset|aChunkNumber|(SlaveNumber<<4);

	TUint8* ptr = Chunks[aChunkNumber].Base()+aOffset;

	TUint8* ptrEnd = ptr+aSize;

	while(ptr<ptrEnd)

		{

		((TUint32*)ptr)[0] = mark;

		((TUint32*)ptr)[1] = ~mark;

		mark += pageSize;

		ptr += pageSize;

		}

	}

void ChunkCheckRegion(TInt aChunkNumber,TInt aOffset,TInt aSize)

	{

	TInt pageSize = PageSize;

	TUint32 mark = aOffset|aChunkNumber|(SlaveNumber<<4);

	TUint8* ptr = Chunks[aChunkNumber].Base()+aOffset;

	TUint8* ptrEnd = ptr+aSize;

	while(ptr<ptrEnd)

		{

		test_Equal(mark,((TUint32*)ptr)[0]);

		test_Equal(~mark,((TUint32*)ptr)[1]);

		mark += pageSize;

		ptr += pageSize;

		}

	}

TInt ChunkOpen(TInt aChunkNumber)

	{

	RChunk& chunk = Chunks[aChunkNumber];

	if(chunk.Handle()!=0)

		return KErrNone;

	if(TRACE) RDebug::Printf("%d %d Open",SlaveNumber,aChunkNumber);

	TInt r = chunk.OpenGlobal(ChunkName(aChunkNumber),false);

	if(r!=KErrNoMemory)

		test_KErrNone(r);

	return r;

	}

//

// Server utils

//

TBuf<KMaxKernelName> ServerName(TInt aSlaveNumber)

	{

	TBuf<KMaxKernelName> name;

	name.Format(_L("T_MMUSTRESS-Server%d"),aSlaveNumber);

	return name;

	}

RServer2 Server;

RMessage2 ServerMessage;

TRequestStatus ServerStatus;

class RTestSession : public RSessionBase

	{

public:

	TInt Connect(TInt aServerNumber)

		{

		return CreateSession(ServerName(aServerNumber),TVersion(),1,EIpcSession_Unsharable,0,&iStatus);

		}

	TInt Send(TInt aChunkNumber)

		{

		return RSessionBase::Send(0,TIpcArgs(SlaveNumber,aChunkNumber,&ChunkPtr[aChunkNumber]));

		}

	TRequestStatus iStatus;

	};

RTestSession Sessions[KNumSlaveProcesses];

//

//

//

void SlaveInit()

	{

	RDebug::Printf("Slave %d initialising",SlaveNumber);

	TBuf<KMaxKernelName> name;

	name.Format(_L("T_MMUSTRESS-Slave%d"),SlaveNumber);

	User::RenameThread(name);

	test_KErrNone(StartSemaphore.Open(2));

	TInt r;

#if !defined(__WINS__) && !defined(__X86__)

	// Move ldd may not be in the ROM so needs to be loaded.

	r=User::LoadLogicalDevice(KMoveLddFileName);

	test_Value(r, r==KErrNone || r==KErrAlreadyExists);

	test_KErrNone(MoveLdd.Open());

#endif

	test_KErrNone(Ldd.Open());

	test_KErrNone(Ldd.CreateVirtualPinObject());

	LocalIpcBuffer = (TUint8*)User::Alloc(KLocalIpcBufferSize);

	test(LocalIpcBuffer!=0);

	test_KErrNone(Server.CreateGlobal(ServerName(SlaveNumber)));

	TUint i;

	// create sessions with other slaves...

	for(i=0; i<KNumSlaveProcesses; i++)

		{

		for(;;)

			{

			r = Sessions[i].Connect(i);

//			RDebug::Printf("%d Session %d = %d,%d",SlaveNumber,i,r,Sessions[i].iStatus.Int());

			if(r==KErrNotFound)

				{

				// give other slaves time to create their servers...

				User::After(10000);

				continue;

				}

			test_KErrNone(r);

			break;

			}

		}

	// process session connect messages...

	for(i=0; i<KNumSlaveProcesses; i++)

		{

		RMessage2 m;

//		RDebug::Printf("%d Server waiting for connect message",SlaveNumber);

		Server.Receive(m);

		test_Equal(RMessage2::EConnect,m.Function())

		m.Complete(KErrNone);

		}

	// wait for our session connections...

	for(i=0; i<KNumSlaveProcesses; i++)

		{

//		RDebug::Printf("%d Session wait %d",SlaveNumber,i);

		User::WaitForRequest(Sessions[i].iStatus);

		}

	// prime server for receiving mesages...

	Server.Receive(ServerMessage,ServerStatus);

	// synchronise with other processes...

	RDebug::Printf("Slave %d waiting for trigger",SlaveNumber);

	RProcess::Rendezvous(KErrNone);

	StartSemaphore.Wait();

	RDebug::Printf("Slave %d started",SlaveNumber);

	}

//

// Test by random operations...

//

void DoTest()

	{

	RandomInit(SlaveNumber);

	TInt r;

	for(;;)

		{

		// select random chunk...

		TInt chunkNumber = Random(KNumTestChunks);

		RChunk& chunk = Chunks[chunkNumber];

		// get the region of this chunk which this process 'owns'...

		TInt offset;

		TInt size;

		ChunkOwnedRegion(chunkNumber,offset,size);

		// calculate a random region in the owned part...

		TInt randomOffset = offset+(Random(size)&~PageMask);

		TInt randomSize = (Random(size-(randomOffset-offset))+PageMask)&~PageMask;

		if(!randomSize)

			continue; // try again

		// pick a random slave...

		TInt randomSlave = Random(KNumSlaveProcesses);

		// open chunk if it isn't already...

		r = ChunkOpen(chunkNumber);

		if(r==KErrNoMemory)

			continue; // can't do anything with chunk if we can't open it

		// check our contents of chunk...

		if(Committed[chunkNumber]==1)

			{

			if(TRACE) RDebug::Printf("%d %d Check %08x+%08x",SlaveNumber,chunkNumber,offset,size);

			ChunkCheckRegion(chunkNumber,offset,size);

			}

		// perform random operation...

		switch(Random(12))

			{

		case 0:

		case 1:

			// close chunk...

			if(TRACE) RDebug::Printf("%d %d Close",SlaveNumber,chunkNumber);

			chunk.Close();

			break;

		case 2:

			// commit all...

			if(TRACE) RDebug::Printf("%d %d Commit all %08x+%08x",SlaveNumber,chunkNumber,offset,size);

			if(Committed[chunkNumber]!=0)

				{

				r = chunk.Decommit(offset,size);

				test_KErrNone(r);

				Committed[chunkNumber] = 0;

				}

			r = chunk.Commit(offset,size);

			if(r!=KErrNoMemory)

				{

				test_KErrNone(r);

				Committed[chunkNumber] = 1;

				ChunkMarkRegion(chunkNumber,offset,size);

				}

			break;

		case 3:

			// decommit all...

			if(TRACE) RDebug::Printf("%d %d Decommit all %08x+%08x",SlaveNumber,chunkNumber,offset,size);

			r = chunk.Decommit(offset,size);

			test_KErrNone(r);

			Committed[chunkNumber] = 0;

			break;

		case 4:

		case 5:

			// commit random...

			if(TRACE) RDebug::Printf("%d %d Commit %08x+%08x",SlaveNumber,chunkNumber,randomOffset,randomSize);

			r = chunk.Commit(randomOffset,randomSize);

			if(r!=KErrNoMemory)

				{

				if(Committed[chunkNumber]==0)

					{

					test_KErrNone(r);

					Committed[chunkNumber] = -1;

					}

				else if(Committed[chunkNumber]==1)

					{

					test_Equal(KErrAlreadyExists,r);

					}

				else

					{

					if(r!=KErrAlreadyExists)

						test_KErrNone(r);

					}

				}

			break;

		case 6:

		case 7:

			// decommit random...

			if(TRACE) RDebug::Printf("%d %d Decommit %08x+%08x",SlaveNumber,chunkNumber,randomOffset,randomSize);

			r = chunk.Decommit(randomOffset,randomSize);

			test_KErrNone(r);

			if(Committed[chunkNumber]==1)

				Committed[chunkNumber] = -1;

			break;

		case 8:

			if(TRACE) RDebug::Printf("%d %d IPC Send->%d",SlaveNumber,chunkNumber,randomSlave);

//			ChunkPtr[chunkNumber].Set(chunk.Base(),ChunkSize(chunkNumber),ChunkSize(chunkNumber));

			ChunkPtr[chunkNumber].Set(chunk.Base()+offset,size,size);

			Sessions[randomSlave].Send(chunkNumber);

			break;

		case 9:

			// process IPC messages...

			if(ServerStatus.Int()==KRequestPending)

				continue;

			User::WaitForRequest(ServerStatus);

			{

			TInt sourceSlave = ServerMessage.Int0();

			chunkNumber = ServerMessage.Int1();

			if(TRACE) RDebug::Printf("%d %d IPC Receive<-%d",SlaveNumber,chunkNumber,sourceSlave);

			test_Equal(0,ServerMessage.Function());

			// get local descriptor for owned region in chunk...

			size = ServerMessage.GetDesMaxLength(2);

			test_NotNegative(size);

			if(size>KLocalIpcBufferSize)

				size = KLocalIpcBufferSize;

			TPtr8 local(LocalIpcBuffer,size,size);

//			if(Random(2))

				{

				// IPC read from other slave...

				if(TRACE) RDebug::Printf("%d %d IPC Read<-%d",SlaveNumber,chunkNumber,sourceSlave);

				TInt panicTrace = Ldd.SetPanicTrace(EFalse);

				r = ServerMessage.Read(2,local);

				Ldd.SetPanicTrace(panicTrace);

				if(r!=KErrBadDescriptor)

					test_KErrNone(r);

				}

//			else

//				{

//				// IPC write to other slave...

//				if(TRACE) RDebug::Printf("%d %d IPC Write->%d",SlaveNumber,chunkNumber,sourceSlave);

//				r = ServerMessage.Write(2,local,offset);

//				if(r!=KErrBadDescriptor)

//					test_KErrNone(r);

//				if(Committed[chunkNumber]==1)

//					ChunkMarkRegion(chunkNumber,offset,size);

//				}

			}

			ServerMessage.Complete(KErrNone);

			Server.Receive(ServerMessage,ServerStatus);

			break;

		case 10:

		case 11:

			// pin memory...

			{

			test_KErrNone(Ldd.UnpinVirtualMemory());

			for(TInt tries=10; tries>0; --tries)

				{

				TInt chunkSize = ChunkSize(chunkNumber);

				offset = Random(chunkSize);

				TInt maxSize = chunkSize-offset;

				if(maxSize>0x1000)

					maxSize = 0x1000;

				size = Random(maxSize);

				r = Ldd.PinVirtualMemory((TLinAddr)chunk.Base()+offset, size);

				if(r!=KErrNotFound && r!=KErrNoMemory)

					{

					test_KErrNone(r);

					break;

					}

				}

			}

			break;

		case 12:

		case 13:

			// Move any page in the chunk, not just the owned region.

			{

#if !defined(__WINS__) && !defined(__X86__)

			for(TInt tries=10; tries>0; --tries)

				{

				TInt chunkSize = ChunkSize(chunkNumber);

				offset = Random(chunkSize);

				MoveLdd.TryMovingUserPage((TAny*)(chunk.Base()+offset), ETrue);

				// Allow the move to fail for any reason as the page of the chunk

				// may or may not be currently committed, pinned, or accessed.

				}

#endif

			}

			break;

		default:

			test(false); // can't happen

			break;

			}

		}

	}

TInt E32Main()

	{

	// get system info...

	MemModelAttributes = UserSvr::HalFunction(EHalGroupKernel, EKernelHalMemModelInfo, NULL, NULL);

	MemModel = MemModelAttributes&EMemModelTypeMask;

	UserHal::PageSizeInBytes(PageSize);

	PageMask = PageSize-1;

	// see if we are a slave process...

	if(User::GetTIntParameter(1,SlaveNumber)==KErrNone)

		{

		// do testing...

		SlaveInit();

		DoTest();

		return KErrGeneral; // shouldn't have returned from testing

		}

	// master process...

	TBool pass = true; // final test result

	test.Title();

	if((MemModelAttributes&EMemModelAttrVA)==false)

		{

		test.Start(_L("TESTS NOT RUN - Not relevent for the memory model"));

		test.End();

		return KErrNone;

		}

	// get time to run tests for...

	TInt timeout = 10; // time in seconds

	TInt cmdLineLen = User::CommandLineLength();

	if(cmdLineLen)

		{

		// get timeout value from command line

		RBuf cmdLine;

		test_KErrNone(cmdLine.Create(cmdLineLen));

		User::CommandLine(cmdLine);