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//
// This tool prints a trace of image load and unload events
//

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


// Pin calls this function every time a new img is loaded
// It can instrument the image, but this example merely
// counts the number of static instructions in the image

VOID ImageLoad(IMG img, VOID *v)
{
    UINT32 count = 0;
    
    for (SEC sec = IMG_SecHead(img); SEC_Valid(sec); sec = SEC_Next(sec))
    { 
        for (RTN rtn = SEC_RtnHead(sec); RTN_Valid(rtn); rtn = RTN_Next(rtn))
        {
            // Prepare for processing of RTN, an  RTN is not broken up into BBLs,
            // it is merely a sequence of INSs 
            RTN_Open(rtn);
            
            for (INS ins = RTN_InsHead(rtn); INS_Valid(ins); ins = INS_Next(ins))
            {
                count++;
            }

            // to preserve space, release data associated with RTN after we have processed it
            RTN_Close(rtn);
        }
    }
    fprintf(stderr, "Image %s has  %d instructions\n", IMG_Name(img).c_str(), count);
}

// argc, argv are the entire command line, including pin -t <toolname> -- ...
int main(int argc, char * argv[])
{
    // prepare for image instrumentation mode
    PIN_InitSymbols();

    // Initialize pin
    PIN_Init(argc, argv);

    // Register ImageLoad to be called when an image is loaded
    IMG_AddInstrumentFunction(ImageLoad, 0);

    // Start the program, never returns
    PIN_StartProgram();
    
    return 0;
}