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144 lines
4.5 KiB
144 lines
4.5 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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#include <iostream>
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#include <fstream>
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#include "pin.H"
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using std::ostream;
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using std::cout;
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using std::cerr;
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using std::string;
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using std::endl;
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ostream* OutFile = NULL;
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KNOB<string> KnobOutputFile(KNOB_MODE_WRITEONCE, "pintool",
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"o", "", "specify output file name");
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INT32 numThreads = 0;
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const INT32 MaxNumThreads = 10000;
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// The running count of instructions is kept here
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// We let each thread's count be in its own data cache line so that
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// multiple threads do not contend for the same data cache line.
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// This has shown to improve the performance of inscount2_mt by up to 6X
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// on SPECOMP2001.
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#define PADSIZE 56 // 64byte linesize : 64 - 8
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struct THREAD_DATA
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{
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UINT64 _count;
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UINT8 _pad[PADSIZE];
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THREAD_DATA() : _count(0) {}
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};
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// key for accessing TLS storage in the threads. initialized once in main()
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static TLS_KEY tls_key;
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// function to access thread-specific data
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THREAD_DATA* get_tls(THREADID threadid)
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{
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THREAD_DATA* tdata = static_cast<THREAD_DATA*>(PIN_GetThreadData(tls_key, threadid));
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return tdata;
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}
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// This function is called before every block
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VOID PIN_FAST_ANALYSIS_CALL docount(ADDRINT c, THREADID tid)
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{
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THREAD_DATA* tdata = get_tls(tid);
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tdata->_count += c;
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}
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VOID ThreadStart(THREADID threadid, CONTEXT *ctxt, INT32 flags, VOID *v)
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{
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numThreads++;
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ASSERT(numThreads <= MaxNumThreads, "Maximum number of threads exceeded\n");
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THREAD_DATA* tdata = new THREAD_DATA();
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PIN_SetThreadData(tls_key, tdata, threadid);
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}
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// Pin calls this function every time a new basic block is encountered
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// It inserts a call to docount
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VOID Trace(TRACE trace, VOID *v)
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{
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// Visit every basic block in the trace
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for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))
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{
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// Insert a call to docount for every bbl, passing the number of instructions.
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// IPOINT_ANYWHERE allows Pin to schedule the call anywhere in the bbl to obtain best performance.
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BBL_InsertCall(bbl, IPOINT_ANYWHERE, (AFUNPTR)docount, IARG_FAST_ANALYSIS_CALL, IARG_UINT32,
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BBL_NumIns(bbl), IARG_THREAD_ID, IARG_END);
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}
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}
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// This function is called when the thread exits
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VOID ThreadFini(THREADID threadIndex, const CONTEXT *ctxt, INT32 code, VOID *v)
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{
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THREAD_DATA* tdata = get_tls(threadIndex);
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*OutFile << "Count[" << decstr(threadIndex) << "] = " << tdata->_count << endl;
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}
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// This function is called when the application exits
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VOID Fini(INT32 code, VOID *v)
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{
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*OutFile << "Number of threads ever exist = " << numThreads << endl;
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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 Pintool counts the number of dynamic instructions executed" << 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 */
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/* ===================================================================== */
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// argc, argv are the entire command line, including pin -t <toolname> -- ...
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int main(int argc, char * argv[])
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{
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// Initialize pin
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if (PIN_Init(argc, argv)) return Usage();
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OutFile = KnobOutputFile.Value().empty() ? &cout : new std::ofstream(KnobOutputFile.Value().c_str());
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// Obtain a key for TLS storage.
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tls_key = PIN_CreateThreadDataKey(NULL);
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if (-1 == tls_key)
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{
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printf ("number of already allocated keys reached the MAX_CLIENT_TLS_KEYS limit\n");
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PIN_ExitProcess(1);
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}
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PIN_AddThreadStartFunction(ThreadStart, NULL);
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// Register Fini to be called when thread exits.
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PIN_AddThreadFiniFunction(ThreadFini, NULL);
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// Register Fini to be called when the application exits.
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PIN_AddFiniFunction(Fini, NULL);
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// Register Instruction to be called to instrument instructions
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TRACE_AddInstrumentFunction(Trace, NULL);
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// Start the program, never returns
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PIN_StartProgram();
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return 1;
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}
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