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112 lines
2.9 KiB
112 lines
2.9 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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/* ===================================================================== */
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/*! @file
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Replaces pthread_spin_lock(). Linux only, of course.
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*/
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#include <stdlib.h>
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#include "pin.H"
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#include <iostream>
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#include <fstream>
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using std::cerr;
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using std::endl;
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using std::cout;
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/* ===================================================================== */
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/* Global Variables */
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/* ===================================================================== */
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// Don't use pthread_spinlock_t* in pthread_spin_lock signature since
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// our pthread_spin_lock type may be different than the application's libc
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// pthread_spin_lock.
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typedef int (*FUNCPTR)(void *);
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static int (*pf_spinlock)(void * lock);
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/* ===================================================================== */
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INT32 Usage()
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{
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cerr <<
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"This pin tool replaces pthread_spin_lock()\n"
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"\n";
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cerr << KNOB_BASE::StringKnobSummary();
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cerr << endl;
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return -1;
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}
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/* ===================================================================== */
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int SpinLock(void * lock)
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{
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cout << "SpinLock: calling pthread_spin_lock()" << endl;
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return (pf_spinlock)(lock);
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}
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/* ===================================================================== */
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// Called every time a new image is loaded.
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// Look for routines that we want to replace.
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VOID ImageLoad(IMG img, VOID *v)
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{
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RTN rtn = RTN_FindByName(img, "pthread_spin_lock");
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if ( RTN_Valid(rtn))
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{
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if ( RTN_IsSafeForProbedReplacementEx(rtn, PROBE_MODE_ALLOW_RELOCATION) )
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{
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// Save the function pointer that points to the new location of
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// the entry point of the original exit in this image.
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//
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pf_spinlock = (FUNCPTR)RTN_ReplaceProbedEx( rtn, PROBE_MODE_ALLOW_RELOCATION,
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AFUNPTR( SpinLock ));
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cout << "ImageLoad: Replaced pthread_spin_lock() in:" << IMG_Name(img) << endl;
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}
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else
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{
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cout << "ImageLocad: Can't replace pthread_spin_lock() in:" << IMG_Name(img) << endl;
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exit(-1);
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}
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}
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}
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/* ===================================================================== */
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int main(int argc, CHAR *argv[])
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{
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PIN_InitSymbols();
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if( PIN_Init(argc,argv) )
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return Usage();
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IMG_AddInstrumentFunction(ImageLoad, 0);
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PIN_StartProgramProbed();
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return 0;
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}
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/* ===================================================================== */
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/* eof */
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/* ===================================================================== */
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