CRASH ui_tests WorkerFileSystemTest.Temporary "Early thread failure, no dcontext"

[derekbruening]

From bruen...@google.com on June 03, 2011 15:14:50

full drmem on ui_tests WorkerFileSystemTest.Temporary

=>

"Early thread failure, no dcontext"

but stack's CONTEXT and ExcptRec seem corrupted: pExcptRec on stack isn't
even 4-aligned, CONTEXT is mostly zeroes.

still not sure what's going on.

Original issue: http://code.google.com/p/drmemory/issues/detail?id=442

[derekbruening]

From bruen...@google.com on August 04, 2011 14:39:55

the confusion in debugging was b/c ended up on initstack b/c thread was exiting.
I located the original stack and found the crash:

00 159a9d10 10007b34 dynamorio!dr_get_thread_id+0x4 [e:\src\dr\git\src\core\x86\instrument.c @ 3223]
01 159a9d70 70d5aa19 drmemorylib!event_thread_exit+0x1f4 [e:\src\drmemory\git\src\drmemory\drmemory.c @ 411]
02 159a9d98 70cf800f dynamorio!instrument_thread_exit_event+0x99 [e:\src\dr\git\src\core\x86\instrument.c @ 1097]
03 159a9db8 70cf8157 dynamorio!dynamo_thread_exit_common+0xbf [e:\src\dr\git\src\core\dynamo.c @ 2299]
04 159a9dc8 70cd1146 dynamorio!dynamo_thread_exit+0x17 [e:\src\dr\git\src\core\dynamo.c @ 2401]
05 159a9dd8 1550ca80 dynamorio!cleanup_and_terminate+0x55

it's ASSERT calling dr_get_current_drcontext()
that's easy to fix: but the ASSERT is b/c can't find TEB:

WARNING: get_TEB_from_tid tid=2268 failed 0xc0000022
ASSERT FAILURE (thread 0): ..\src\drmemory\drmemory.c:411: teb != NULL (invalid param)

0:005> kb =0x2002f9cc 0x2002f9b8 0x772f0086
ChildEBP RetAddr Args to Child
2002f9b4 7732d5d1 00000000 00000000 00000002 ntdll!ZwTerminateThread+0x12
2002f9cc 77331b09 00000000 30382703 00000000 ntdll!RtlExitUserThread+0x39
2002fb28 7514339a 00469d78 2002fb74 77309ed2 ntdll!TppWorkerThread+0x856
2002fb34 77309ed2 00469d78 3038275f 00000000 kernel32!BaseThreadInitThunk+0xe
2002fb74 77309ea5 77316679 00469d78 00000000 ntdll!__RtlUserThreadStart+0x70
2002fb8c 00000000 77316679 00469d78 00000000 ntdll!_RtlUserThreadStart+0x1b

so it's a thread pool thread who's refusing us access.

solution: cache TEB from when running as that thread.

xref issue #538 w/ same thread type

[derekbruening]

From derek.br...@gmail.com on August 05, 2011 07:08:12

This issue was closed by revision r456 .

Status: Fixed