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175 lines
5.7 KiB
175 lines
5.7 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 "pin.H"
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#include <iostream>
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#include <fstream>
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#include <string.h>
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using std::cout;
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using std::ios;
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using std::hex;
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using std::cerr;
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using std::endl;
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using std::string;
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/* ===================================================================== */
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/* Global Variables */
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/* ===================================================================== */
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std::ofstream TraceFile;
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/* ===================================================================== */
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/* Commandline Switches */
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/* ===================================================================== */
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KNOB<string> KnobOutputFile(KNOB_MODE_WRITEONCE, "pintool",
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"o", "", "specify trace file name");
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/* ===================================================================== */
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/* ===================================================================== */
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/* Analysis routines */
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/* ===================================================================== */
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VOID MemcpyBefore(CHAR * name, ADDRINT dst, ADDRINT src, ADDRINT size)
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{
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TraceFile << name << "(" << dst << "," << src << "," << size << ")" << endl;
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}
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// Capture the return address of the ifunc which is the address of the actual memcpy
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VOID * IfuncMemcpyWrapper( CONTEXT * context, AFUNPTR orgFuncptr)
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{
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VOID * ret;
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PIN_CallApplicationFunction( context, PIN_ThreadId(),
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CALLINGSTD_DEFAULT, orgFuncptr,
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NULL, PIN_PARG(void *), &ret,
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PIN_PARG_END() );
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TraceFile << "memcpy (ifunc)" <<endl;
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cout << "ifunc_memcpy(" << ") returns " << hex << ret << endl;
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return ret;
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}
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/* ===================================================================== */
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/* Instrumentation routines */
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/* ===================================================================== */
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VOID Routine( IMG img, RTN rtn, void * v)
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{
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// In some libc implementations, memcpy, memmove symbols have the same address.
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// In this case, since Pin only creates one RTN per start address, the RTN name
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// will be either memcpy, memmove.
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bool isMemmove = strcmp(RTN_Name(rtn).c_str(),"memmove")==0 ;
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bool isMemcpy = strcmp(RTN_Name(rtn).c_str(),"memcpy")==0 ;
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if (isMemmove || isMemcpy)
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{
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if (SYM_IFuncResolver(RTN_Sym(rtn)))
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{
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TraceFile << "Ifunc memcpy" << endl;
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PROTO proto_ifunc_memcpy = PROTO_Allocate( PIN_PARG(void *), CALLINGSTD_DEFAULT,
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"memcpy", PIN_PARG_END() );
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RTN_ReplaceSignature(rtn, AFUNPTR( IfuncMemcpyWrapper ),
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IARG_PROTOTYPE, proto_ifunc_memcpy,
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IARG_CONTEXT,
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IARG_ORIG_FUNCPTR,
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IARG_END);
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}
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else
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{
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RTN_Open(rtn);
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TraceFile << "Normal memcpy" << endl;
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// Instrument memcpy() to print the input argument value and the return value.
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RTN_InsertCall(rtn, IPOINT_BEFORE, (AFUNPTR)MemcpyBefore,
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IARG_ADDRINT, "memcpy (normal)",
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IARG_FUNCARG_ENTRYPOINT_VALUE, 0,
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IARG_FUNCARG_ENTRYPOINT_VALUE, 1,
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IARG_FUNCARG_ENTRYPOINT_VALUE, 2,
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IARG_END);
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RTN_Close(rtn);
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}
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}
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}
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VOID Image(IMG img, VOID *v)
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{
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for( SEC sec=IMG_SecHead(img); SEC_Valid(sec) ; sec=SEC_Next(sec) )
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{
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if ( SEC_IsExecutable(sec) )
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{
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for( RTN rtn=SEC_RtnHead(sec); RTN_Valid(rtn) ; rtn=RTN_Next(rtn) )
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Routine( img, rtn,v);
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}
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}
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}
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/* ===================================================================== */
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VOID Fini(INT32 code, VOID *v)
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{
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TraceFile.close();
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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 produces a trace of calls to normal and ifunc memcpy." << 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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int main(int argc, char *argv[])
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{
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// Initialize pin & symbol manager
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PIN_InitSymbolsAlt(SYMBOL_INFO_MODE(UINT32(IFUNC_SYMBOLS) | UINT32(DEBUG_OR_EXPORT_SYMBOLS)));
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if( PIN_Init(argc,argv) )
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{
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return Usage();
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}
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if((KnobOutputFile.Value()).empty())
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{
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cerr << "No output file name has been provided to the tool" << endl;
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}
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// Write to a file since cout and cerr maybe closed by the application
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TraceFile.open(KnobOutputFile.Value().c_str());
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TraceFile << hex;
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TraceFile.setf(ios::showbase);
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// Register Image to be called to instrument functions.
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IMG_AddInstrumentFunction(Image, 0);
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PIN_AddFiniFunction(Fini, 0);
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// Never returns
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PIN_StartProgram();
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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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