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153 lines
4.5 KiB
153 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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/*
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* This file contains an ISA-portable PIN tool for tracing system calls
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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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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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ostream* OutFile = NULL;
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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 = INVALID_TLS_KEY;
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// a running count of the instructions
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union thread_data_t
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{
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struct
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{
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UINT64 _lastSyscallStart;
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UINT64 _totalAccumulated;
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} _data;
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// Force each thread's data to 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 avoids the false sharing problem.
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char _pad[64];
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};
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#ifdef TARGET_WINDOWS
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extern "C" unsigned __int64 __rdtsc();
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#pragma intrinsic(__rdtsc)
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static inline UINT64 rdtsc()
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{
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return __rdtsc();
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}
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#else
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static inline UINT64 rdtsc()
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{
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UINT32 hi, lo;
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__asm__ __volatile__ ("rdtsc" : "=a"(lo), "=d"(hi));
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return ( ((UINT64)lo) + (((UINT64)hi)<<32) );
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}
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#endif
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VOID SyscallEntry(THREADID threadIndex, CONTEXT *ctxt, SYSCALL_STANDARD std, VOID *v)
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{
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thread_data_t* tdata = static_cast<thread_data_t*>(PIN_GetThreadData(tls_key, threadIndex));
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ASSERTX(0 == tdata->_data._lastSyscallStart);
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tdata->_data._lastSyscallStart = rdtsc();
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}
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VOID SyscallExit(THREADID threadIndex, CONTEXT *ctxt, SYSCALL_STANDARD std, VOID *v)
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{
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thread_data_t* tdata = static_cast<thread_data_t*>(PIN_GetThreadData(tls_key, threadIndex));
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tdata->_data._totalAccumulated = rdtsc() - tdata->_data._lastSyscallStart;
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tdata->_data._lastSyscallStart = 0;
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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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thread_data_t* tdata = new thread_data_t;
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memset(tdata, 0, sizeof(*tdata));
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if (PIN_SetThreadData(tls_key, tdata, threadid) == FALSE)
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{
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cerr << "PIN_SetThreadData failed" << endl;
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PIN_ExitProcess(1);
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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_t* tdata = static_cast<thread_data_t*>(PIN_GetThreadData(tls_key, threadIndex));
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*OutFile << "Thread " << decstr(threadIndex) << " spent " << tdata->_data._totalAccumulated << " processor cycles in system calls" << endl;
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delete tdata;
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}
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VOID Fini(INT32 code, VOID *v)
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{
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if (OutFile != &cout) delete OutFile;
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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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PIN_ERROR("This tool prints a log of system calls"
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+ KNOB_BASE::StringKnobSummary() + "\n");
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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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int main(int argc, char *argv[])
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{
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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 (tls_key == INVALID_TLS_KEY)
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{
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cerr << "number of already allocated keys reached the MAX_CLIENT_TLS_KEYS limit" << endl;
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PIN_ExitProcess(1);
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}
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// Register ThreadStart to be called when a thread starts.
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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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PIN_AddSyscallEntryFunction(SyscallEntry, 0);
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PIN_AddSyscallExitFunction(SyscallExit, 0);
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PIN_AddFiniFunction(Fini, 0);
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PIN_CONFIGURATION_INFO configInfo = PIN_CreateDefaultConfigurationInfo();
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PIN_SetAllowedConcurrentCallbacks(configInfo, PIN_CALLBACK_TYPE_SYSCALL);
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// Start the program, never returns
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PIN_StartProgram(configInfo);
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return 0;
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}
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