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/* ===================================================================== */
/*! @file
 *  This file tests calling malloc from the tool and if the memoray 
 *  allocation statistic are reported correctly.
 *
 *  For each trace of the application is allocates 128 bytes.
 *  In the fini it reports the amount of allocated memory.
 *  the test is run as:
 *      pin -t tool_malloc -o tool_malloc.out -xyzzy -statistic -- cp makefile <new-file>
 *
 *  The test then compare between the amount in tool_malloc.out and pintool.log
 */

#include "pin.H"
#include <iostream>
#include <fstream>
#include <stdlib.h>

using namespace std;

const INT BUF_SIZE = 100;

struct REC {
    CHAR data[BUF_SIZE];
    struct REC *next;
};

/* ===================================================================== */
/* Global Variables */
/* ===================================================================== */

struct REC *head = 0;
UINT64 alloc_count = 0;
ofstream TraceFile;

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

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

/* ===================================================================== */

INT32 Usage()
{
    cerr <<
        "This tool allocate a record for each trace, and report the number of allocated bytes"
        "\n";

    cerr << KNOB_BASE::StringKnobSummary();

    cerr << endl;

    return -1;
}

/* ===================================================================== */

VOID Trace(TRACE trace, VOID *v)
{
    struct REC *rec = (struct REC *)malloc(sizeof(struct REC));
    alloc_count += sizeof(struct REC);
    rec->next = head;
    head = rec;
}

/* ===================================================================== */

VOID Fini(INT32 code, VOID *v)
{
    TraceFile.open(KnobOutputFile.Value().c_str());
    TraceFile << alloc_count << endl;
    TraceFile.close();
}

/* ===================================================================== */

int main(int argc, char *argv[])
{
    if( PIN_Init(argc,argv) )
    {
        return Usage();
    }
    
    TRACE_AddInstrumentFunction(Trace, 0);
    PIN_AddFiniFunction(Fini, 0);

    // Never returns
    PIN_StartProgram();
    
    return 0;
}

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