AV in libcoreclr.so`EventPipeEventInstance::GetTimeStamp(this=0x0000000000000000)

[brianrob]

AV when writing the contents of the EventPipe circular buffer to a trace file:

• thread Merge changes from TFS coreclr#1: tid = 36267, 0x00007ffff59aaa04 libcoreclr.soEventPipeEventInstance::GetTimeStamp(this=0x0000000000000000) const + 52 at eventpipeeventinstance.cpp:65, name = 'dotnet', stop reason = invalid address (fault address: 0x18) frame #0: 0x00007ffff59aaa04 libcoreclr.soEventPipeEventInstance::GetTimeStamp(this=0x0000000000000000) const + 52 at eventpipeeventinstance.cpp:65
  • frame Merge changes from TFS coreclr#1: 0x00007ffff5d09274 libcoreclr.soEventPipeBuffer::GetNext(this=0x00007fff40019ca0, pEvent=0x0000000000000000, beforeTimeStamp=LARGE_INTEGER at 0x00007fffffffb130) + 292 at eventpipebuffer.cpp:179 frame dotnet/coreclr#2: 0x00007ffff5d0935f libcoreclr.soEventPipeBuffer::PeekNext(this=0x00007fff40019ca0, beforeTimeStamp=LARGE_INTEGER at 0x00007fffffffb170) + 79 at eventpipebuffer.cpp:205
    frame Merge changes from TFS coreclr#3: 0x00007ffff59af7e4 libcoreclr.soEventPipeBufferList::PeekNextEvent(this=0x00007fff4001b800, beforeTimeStamp=LARGE_INTEGER at 0x00007fffffffb1d0, pContainingBuffer=0x00007fffffffb2b0) + 148 at eventpipebuffermanager.cpp:653 frame dotnet/coreclr#4: 0x00007ffff59af5cc libcoreclr.soEventPipeBufferManager::WriteAllBuffersToFile(this=0x00000000006475d0, pFile=0x000000000076e690, stopTimeStamp=LARGE_INTEGER at 0x00007fffffffb2c0) + 220 at eventpipebuffermanager.cpp:351
    frame Fix build breaks in GC sample project coreclr#5: 0x00007ffff59a6292 libcoreclr.soEventPipe::Disable() + 194 at eventpipe.cpp:187 frame dotnet/coreclr#6: 0x00007ffff59a7140 libcoreclr.soEventPipeInternal::Disable() + 128 at eventpipe.cpp:514
    frame Build status table coreclr#7: 0x00007fff7c97afe3
    frame Clean up runtest script coreclr#8: 0x00007fff7ca7ea2c
    frame Builds should work from non-root directories coreclr#9: 0x00007ffff5b954df libcoreclr.soCallDescrWorkerInternal + 124 at calldescrworkeramd64.S:893 frame dotnet/coreclr#10: 0x00007ffff593e95a libcoreclr.soCallDescrWorkerWithHandler(pCallDescrData=0x00007fffffffc218, fCriticalCall=0) + 522 at callhelpers.cpp:78
    frame Merge changes from TFS coreclr#11: 0x00007ffff5ab4ff4 libcoreclr.soCallDescrWorkerReflectionWrapper(this=0x00007fffffffb618, pParam=0x00007fffffffb628)::$_2::operator()(CallDescrWorkerReflectionWrapper(CallDescrData*, Frame*)::Param*) const + 36 at reflectioninvocation.cpp:825 frame dotnet/coreclr#12: 0x00007ffff5ab4e5c libcoreclr.soCallDescrWorkerReflectionWrapper(pCallDescrData=0x00007fffffffc218, pFrame=0x00007fffffffbf50) + 124 at reflectioninvocation.cpp:827
    frame Gc test build coreclr#13: 0x00007ffff5ab6c67 libcoreclr.soRuntimeMethodHandle::InvokeMethod(target=0x0000000000000000, objs=0x0000000000000000, pSigUNSAFE=0x00007fff5401f638, fConstructor=false) + 5959 at reflectioninvocation.cpp:1440 frame dotnet/coreclr#14: 0x00007fff7c780132 frame dotnet/coreclr#15: 0x00007fff7c77ff9d frame dotnet/coreclr#16: 0x00007fff7c75bbfe frame dotnet/coreclr#17: 0x00007fff7d10380d frame dotnet/coreclr#18: 0x00007fff7d10099e frame dotnet/coreclr#19: 0x00007ffff5b954df libcoreclr.soCallDescrWorkerInternal + 124 at calldescrworkeramd64.S:893
    frame Fix mscorlib warnings. coreclr#20: 0x00007ffff593e95a libcoreclr.soCallDescrWorkerWithHandler(pCallDescrData=0x00007fffffffc7e8, fCriticalCall=0) + 522 at callhelpers.cpp:78 frame dotnet/coreclr#21: 0x00007ffff5940130 libcoreclr.soMethodDescCallSite::CallTargetWorker(this=0x00007fffffffc950, pArguments=0x00007fffffffc8e0, pReturnValue=0x0000000000000000, cbReturnValue=0) + 2960 at callhelpers.cpp:645
    frame Fix typo coreclr#22: 0x00007ffff5778c9c libcoreclr.soMethodDescCallSite::Call(this=0x00007fffffffc950, pArguments=0x00007fffffffc8e0) + 44 at callhelpers.h:433 frame dotnet/coreclr#23: 0x00007ffff5bddf87 libcoreclr.soRunMain(this=0x00007fffffffcaa8, pParam=0x00007fffffffcba0)::$_1::operator()(RunMain(MethodDesc*, short, int*, REF)::Param) const::{lambda(RunMain(MethodDesc*, short, int*, REF)::Param)WIP: repo consolidation scouting kick-off - make clr build locally on Windows #1}::operator()(RunMain(MethodDesc*, short, int*, REF)::Param) const + 743 at assembly.cpp:1847
    frame Update README.md coreclr#24: 0x00007ffff5bdaf09 libcoreclr.soRunMain(this=0x00007fffffffcb90, __EXparam=0x00007fffffffcba0)::$_1::operator()(RunMain(MethodDesc*, short, int*, REF<PtrArray>*)::Param*) const + 89 at assembly.cpp:1862 frame dotnet/runtime#3858: 0x00007ffff5bdad1e libcoreclr.soRunMain(pFD=0x00007fff7baa5678, numSkipArgs=1, piRetVal=0x00007fffffffcc9c, stringArgs=0x00007fffffffd0f8) + 510 at assembly.cpp:1862
    frame [Missing?] documentation #3859: 0x00007ffff5bdb19d libcoreclr.soAssembly::ExecuteMainMethod(this=0x0000000000754f10, stringArgs=0x00007fffffffd0f8, waitForOtherThreads=1) + 333 at assembly.cpp:1944 frame dotnet/coreclr#27: 0x00007ffff576e17a libcoreclr.soCorHost2::ExecuteAssembly(this=0x0000000000676d90, dwAppDomainId=1, pwzAssemblyPath=0x0000000000752b40, argc=1, argv=0x0000000000653300, pReturnValue=0x00007fffffffd4fc) + 1322 at corhost.cpp:501
    frame PATENTS.TXT refers to wrong repo #3860: 0x00007ffff5705222 libcoreclr.socoreclr_execute_assembly(hostHandle=0x0000000000676d90, domainId=1, argc=1, argv=0x000000000066e770, managedAssemblyPath=0x0000000000752a80, exitCode=0x00007fffffffd4fc) + 354 at unixinterface.cpp:407 frame dotnet/runtime#3861: 0x00007ffff68647d3 libhostpolicy.socoreclr::execute_assembly(host_handle=0x0000000000676d90, domain_id=1, argc=1, argv=0x000000000066e770, managed_assembly_path=0x0000000000752a80, exit_code=0x00007fffffffd4fc) + 131 at coreclr.cpp:104
    frame Support VS 2015 as well? #3862: 0x00007ffff68594c5 libhostpolicy.sorun(args=0x00007fffffffda58) + 5973 at hostpolicy.cpp:236 frame dotnet/runtime#3863: 0x00007ffff6859b62 libhostpolicy.socorehost_main(argc=3, argv=0x00007fffffffe578) + 610 at hostpolicy.cpp:322
    frame Correct typos in paraminstanceapi.h coreclr#32: 0x00007ffff6b191c4 libhostfxr.soexecute_app(impl_dll_dir=0x00007fffffffde98, init=0x00007fffffffdd38, argc=3, argv=0x00007fffffffe578) + 212 at hostfxr.cpp:73 frame dotnet/runtime#3864: 0x00007ffff6b22034 libhostfxr.sofx_muxer_t::read_config_and_execute(own_dir=0x00007fffffffe370, app_candidate=0x00007fffffffe1c0, opts=0x00007fffffffe208, new_argc=3, new_argv=0x00007fffffffe578, mode=muxer) + 3940 at fx_muxer.cpp:963
    frame Interpreter: volatile ldobj appears to have incorrect semantics? #3865: 0x00007ffff6b21007 libhostfxr.sofx_muxer_t::parse_args_and_execute(own_dir=0x00007fffffffe370, own_dll=0x00007fffffffe358, argoff=1, argc=3, argv=0x00007fffffffe578, exec_mode=false, mode=muxer, is_an_app=0x00007fffffffe357) + 1975 at fx_muxer.cpp:862 frame dotnet/coreclr#35: 0x00007ffff6b22663 libhostfxr.sofx_muxer_t::execute(argc=3, argv=0x00007fffffffe578) + 947 at fx_muxer.cpp:1026
    frame Avoid unnecessary work for identical locations in Buffer.BlockCopy coreclr#36: 0x00007ffff6b19245 libhostfxr.sohostfxr_main(argc=3, argv=0x00007fffffffe578) + 53 at hostfxr.cpp:99 frame dotnet/runtime#3866: 0x000000000040c4ca dotnetrun(argc=3, argv=0x00007fffffffe578) + 970 at corehost.cpp:199
    frame Fixes #37 Missing Files to build GC stress Tests coreclr#38: 0x000000000040c637 dotnetmain(argc=3, argv=0x00007fffffffe578) + 167 at corehost.cpp:233 frame dotnet/runtime#3867: 0x00007ffff6d6c830 libc.so.6__libc_start_main + 240
    frame Empty Product directory after the build #3868: 0x000000000040a425 dotnet`_start + 41

[brianrob]

Candidate fix at brianrob/coreclr@fc6a640.