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99 lines
2.4 KiB
99 lines
2.4 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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/*! @file
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*/
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#include "pin.H"
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#include "tool_macros.h"
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#include <iostream>
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#include <fstream>
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#include <cstdio>
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#include <signal.h>
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#include <sched.h>
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using std::cerr;
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using std::endl;
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BOOL changeSigmask = FALSE;
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INT32 Usage()
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{
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cerr <<
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"This pin tool examines the correctness of the retrieve and alteration of the thread sigmask"
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"when the tool registers a THREAD_ATTACH_PROBED_CALLBACK callback.\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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// Notify the application when the sigmask has changed.
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BOOL Replacement_waitChangeSigmask()
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{
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while(changeSigmask == 0) sched_yield();
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return TRUE;
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}
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VOID AttachedThreadStart(void *sigmask, VOID * v)
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{
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sigset_t * sigset = (sigset_t *)sigmask;
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/*
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* change the sigmask of the thread whose sigmask contains SIGUSR2 and doen't contain SIGUSR1
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*/
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if ( 0 != sigismember( sigset, SIGUSR2 ) && ( 0 == sigismember( sigset, SIGUSR1 ) ))
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{
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sigdelset(sigset, SIGUSR2);
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sigaddset(sigset, SIGUSR1);
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}
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changeSigmask = TRUE;
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}
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// Image load callback for the first Pin session
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VOID ImageLoad(IMG img, VOID *v)
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{
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if ( IMG_IsMainExecutable(img))
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{
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RTN rtn = RTN_FindByName(img, C_MANGLE("WaitChangeSigmask"));
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// Relevant only in the attach scenario.
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if (RTN_Valid(rtn))
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{
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if(RTN_IsSafeForProbedReplacement(rtn))
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RTN_ReplaceProbed(rtn, AFUNPTR(Replacement_waitChangeSigmask));
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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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if( PIN_Init(argc,argv) )
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{
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return Usage();
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}
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PIN_InitSymbols();
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IMG_AddInstrumentFunction(ImageLoad, 0);
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PIN_AddThreadAttachProbedFunction(AttachedThreadStart, 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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