/*
 * 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.
 */

#include <stdio.h>
#include "pin.H"


/*
  Demonstrates manually inlining a call to a simple function
*/

#if defined(TARGET_MAC)
static char const * replacedfunname = "_one";
#else
static char const * replacedfunname = "one";
#endif

ADDRINT oneAddress = 0;

ADDRINT Two()
{
    fprintf(stderr,"In 2\n");
    fflush (stderr);
    return 2;
}

VOID Image(IMG img, VOID *)
{
    RTN rtn = RTN_FindByName(img, replacedfunname);
    
    if (RTN_Valid(rtn))
    {
        fprintf(stderr,"Found one\n");
        fflush (stderr);
        oneAddress = RTN_Address(rtn);
    }
}

VOID Instruction(INS ins, VOID *)
{
    if (INS_IsDirectControlFlow(ins)
        && INS_DirectControlFlowTargetAddress(ins) == oneAddress)
    {
        INS_InsertCall(ins, IPOINT_BEFORE, AFUNPTR(Two), 
                       IARG_RETURN_REGS, REG_GAX, IARG_END);
        INS_Delete(ins);
    }
}

int main(INT32 argc, CHAR **argv)
{
    PIN_InitSymbols();
    
    PIN_Init(argc, argv);
    
    IMG_AddInstrumentFunction(Image, 0);
    INS_AddInstrumentFunction(Instruction, 0);
    
    // Never returns
    PIN_StartProgram();
    
    return 0;
}