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129 lines
4.0 KiB
129 lines
4.0 KiB
/*
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* Copyright 2002-2019 Intel Corporation.
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*
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* This software is provided to you as Sample Source Code as defined in the accompanying
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* End User License Agreement for the Intel(R) Software Development Products ("Agreement")
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* section 1.L.
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*
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* This software and the related documents are provided as is, with no express or implied
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* warranties, other than those that are expressly stated in the License.
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*/
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// Replace an original function with a custom function defined in the tool using
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// probes. The replacement function has a different signature from that of the
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// original replaced function.
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#include "pin.H"
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#include <iostream>
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using std::cout;
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using std::hex;
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using std::cerr;
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using std::flush;
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using std::dec;
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using std::endl;
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typedef VOID * ( *FP_MALLOC )( size_t );
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// This is the replacement routine.
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//
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VOID * NewMalloc( FP_MALLOC orgFuncptr, UINT32 arg0, ADDRINT returnIp )
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{
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// Normally one would do something more interesting with this data.
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//
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cout << "NewMalloc ("
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<< hex << ADDRINT ( orgFuncptr ) << ", "
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<< dec << arg0 << ", "
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<< hex << returnIp << ")"
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<< endl << flush;
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// Call the relocated entry point of the original (replaced) routine.
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//
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VOID * v = orgFuncptr( arg0 );
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return v;
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}
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// Pin calls this function every time a new img is loaded.
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// It is best to do probe replacement when the image is loaded,
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// because only one thread knows about the image at this time.
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//
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VOID ImageLoad( IMG img, VOID *v )
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{
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// See if malloc() is present in the image. If so, replace it.
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//
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RTN rtn = RTN_FindByName( img, "malloc" );
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if (RTN_Valid(rtn))
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{
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if (RTN_IsSafeForProbedReplacement(rtn))
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{
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cout << "Replacing malloc in " << IMG_Name(img) << endl;
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// Define a function prototype that describes the application routine
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// that will be replaced.
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//
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PROTO proto_malloc = PROTO_Allocate(PIN_PARG(void *), CALLINGSTD_DEFAULT,
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"malloc", PIN_PARG(int), PIN_PARG_END());
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// Replace the application routine with the replacement function.
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// Additional arguments have been added to the replacement routine.
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//
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RTN_ReplaceSignatureProbed(rtn, AFUNPTR(NewMalloc),
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IARG_PROTOTYPE, proto_malloc,
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IARG_ORIG_FUNCPTR,
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IARG_FUNCARG_ENTRYPOINT_VALUE, 0,
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IARG_RETURN_IP,
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IARG_END);
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// Free the function prototype.
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//
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PROTO_Free(proto_malloc);
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}
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else
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{
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cout << "Skip replacing malloc in " << IMG_Name(img) << " since it is not safe." << endl;
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}
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}
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}
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/* ===================================================================== */
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/* Print Help Message */
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/* ===================================================================== */
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INT32 Usage()
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{
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cerr << "This tool demonstrates how to replace an original" << endl;
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cerr << " function with a custom function defined in the tool " << endl;
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cerr << " using probes. The replacement function has a different " << endl;
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cerr << " signature from that of the original replaced function." << endl;
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cerr << endl << KNOB_BASE::StringKnobSummary() << endl;
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return -1;
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}
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/* ===================================================================== */
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/* Main: Initialize and start Pin in Probe mode. */
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/* ===================================================================== */
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int main( INT32 argc, CHAR *argv[] )
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{
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// Initialize symbol processing
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//
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PIN_InitSymbols();
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// Initialize pin
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//
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if (PIN_Init(argc, argv)) return Usage();
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// Register ImageLoad to be called when an image is loaded
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//
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IMG_AddInstrumentFunction( ImageLoad, 0 );
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// Start the program in probe mode, never returns
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//
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PIN_StartProgramProbed();
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return 0;
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}
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