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//
//  ORIGINAL_AUTHOR: Kim Hazelwood
//
//  This tool shows the result of limiting the trace size to a 
//      given number of basic blocks 
//  Sample usage:
//    pin -t bb_test -b 1 -- /bin/ls

#include "pin.H"
#include "utils.H"
#include "portability.H"
#include <iostream>
#include <fstream>

using namespace std;

/* ================================================================== */
/* Global Variables                                                   */
/* ================================================================== */
int numBBs;
int insertions;
ofstream TraceFile;

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

KNOB<string> KnobOutputFile(KNOB_MODE_WRITEONCE, "pintool",
    "o", "bb_test.out", "specify trace file name");
KNOB<UINT32> KnobBBLimit(KNOB_MODE_WRITEONCE, "pintool",
    "b", "0", "Maximum number of basic blocks per trace");

/* ================================================================== */
/*
 Change the max basic blocks
*/
VOID InitBBCount()
{
    string logFileName = KnobOutputFile.Value();
    TraceFile.open(logFileName.c_str());
    
    insertions = 0;
    
    numBBs = KnobBBLimit.Value();
    ASSERTX(numBBs > 0);
    CODECACHE_ChangeMaxBblsPerTrace(numBBs);
    
    TraceFile << "Max BBs Set To: " << numBBs << endl;
}

/* ================================================================== */
/*
 Print details of traces as they are inserted
*/
VOID WatchTraces(TRACE trace, VOID *v)
{
    insertions++;
    ADDRINT orig_pc = TRACE_Address(trace);
    TraceFile << "Code cache insertion #" << insertions;
    TraceFile << "\torig pc=0x" << hex << orig_pc;
    TraceFile << "\tcache pc=0x" << hex << TRACE_CodeCacheAddress(trace);
    string name = RTN_FindNameByAddress(orig_pc);
    if (name == "")
        name = "*noname*";
        
    TraceFile << "\ttrace size (orig)=" << TRACE_OriginalSize(trace);
    TraceFile << "\ttrace size (cache)=" << TRACE_CodeCacheSize(trace);
    TraceFile << " (BBL=" << TRACE_NumBbl(trace) << " Ins=" << TRACE_NumIns(trace) << ")";
    // TraceFile << "\t+stub size=" << stub_size;
    TraceFile << "\t+name=" << name << endl;
}

/* ================================================================== */
/*
 Print sizes
*/
VOID PrintFinalInfo(INT32 code, VOID *v)
{
    TraceFile << "Final trace count: " << CODECACHE_NumTracesInCache() << endl;
    TraceFile << "Final cache size: " << BytesToString(CODECACHE_MemUsed()) << endl;
    TraceFile << "#eof" << endl;
    TraceFile.close();
}

/* ================================================================== */
/*
 Initialize and begin program execution under the control of Pin
*/
int main(INT32 argc, CHAR **argv)
{
    if (PIN_Init(argc, argv)) return Usage();

    // Register a routine that gets called when the cache is first initialized
    CODECACHE_AddCacheInitFunction(InitBBCount, 0);

    // Register a routine that gets called when a trace is
    //  inserted into the codecache
    CODECACHE_AddTraceInsertedFunction(WatchTraces, 0);
    
    // Register a routine that gets called when the program ends
    PIN_AddFiniFunction(PrintFinalInfo, 0);
    
    PIN_StartProgram();  // Never returns
    
    return 0;
}