/*
 * Copyright 2002-2019 Intel Corporation.
 * 
 * This software is provided to you as Sample Source Code as defined in the accompanying
 * End User License Agreement for the Intel(R) Software Development Products ("Agreement")
 * section 1.L.
 * 
 * This software and the related documents are provided as is, with no express or implied
 * warranties, other than those that are expressly stated in the License.
 */

/*! @file
 */

#include "pin.H"
#include <iostream>
#include <fstream>
#include <stdlib.h>
#include <assert.h>
#include <tool_macros.h>
using std::ofstream;
using std::string;
using std::ios;
using std::hex;
using std::cerr;
using std::dec;
using std::endl;


/* ===================================================================== */
/* Commandline Switches */
/* ===================================================================== */

KNOB<string> KnobOutputFile(KNOB_MODE_WRITEONCE, "pintool",
    "o", "jit_tool.out", "specify file name");

ofstream TraceFile;
/* ===================================================================== */

INT32 Usage()
{
    cerr <<
        "This pin tool tests MT attach in JIT mode.\n"
        "\n";
    cerr << KNOB_BASE::StringKnobSummary();
    cerr << endl;
    return -1;
}

PIN_LOCK pinLock;
VOID DetachPinFromMTApplication(unsigned int numOfThreads)
{
    PIN_GetLock(&pinLock, PIN_GetTid());
    TraceFile << "Pin tool: sending detach request" << endl;
    PIN_ReleaseLock(&pinLock);
    PIN_Detach();
}

int HoldAppThread()
{
	return 1;
}

UINT32  threadCounter=0;
VOID ThreadStart(THREADID threadid, CONTEXT *ctxt, INT32 flags, VOID *v)
{
    PIN_GetLock(&pinLock, PIN_GetTid());
    TraceFile << "Thread counter is updated to " << dec <<  (threadCounter+1) << endl;
    ++threadCounter;
    PIN_ReleaseLock(&pinLock);

}
BOOL AllThreadsNotifed(unsigned int numOfThreads)
{
    PIN_GetLock(&pinLock, PIN_GetTid());
    // Check that we don't have any extra thread
    assert(threadCounter <= numOfThreads);
    if (threadCounter == numOfThreads)
    {
        TraceFile.close();
        PIN_ReleaseLock(&pinLock);
        return TRUE;
    }
    PIN_ReleaseLock(&pinLock);
    return FALSE;
}


VOID ImageLoad(IMG img, void *v)
{
	RTN rtn = RTN_FindByName(img, C_MANGLE("DetachPin"));
	if (RTN_Valid(rtn))
	{
	    TraceFile << "DetachPin instrumented " << endl;
		RTN_Replace(rtn, AFUNPTR(DetachPinFromMTApplication));
	}
	
	rtn = RTN_FindByName(img, C_MANGLE("ThreadHoldByPin"));
	if (RTN_Valid(rtn))
	{
	    TraceFile << "ThreadHoldByPin instrumented " << endl;
		RTN_Replace(rtn, AFUNPTR(HoldAppThread));
	}
	
	rtn = RTN_FindByName(img, C_MANGLE("ThreadsReady"));
	if (RTN_Valid(rtn))
	{
	    TraceFile << "ThreadsReady instrumented " << endl;
		RTN_Replace(rtn, AFUNPTR(AllThreadsNotifed));
	}

}	
/* ===================================================================== */

int main(int argc, CHAR *argv[])
{
    PIN_InitSymbols();

    if( PIN_Init(argc,argv) )
    {
        return Usage();
    }

    TraceFile.open(KnobOutputFile.Value().c_str());
    TraceFile << hex;
    TraceFile.setf(ios::showbase);

    PIN_InitLock(&pinLock);

    IMG_AddInstrumentFunction(ImageLoad, 0);
    PIN_AddThreadStartFunction(ThreadStart, 0);
    PIN_StartProgram();
    
    return 0;
}

/* ===================================================================== */
/* eof */
/* ===================================================================== */