Linaro AArch64 cross-distro work

aarch64 GDB: "Cannot find user-level thread for LWP ###: capability not available"

Bug #1103489 reported by Leif Lindholm on 2013-01-23

This bug affects 1 person

	Status	Importance	Assigned to	Milestone
Linaro AArch64 cross-distro work	Fix Released	Critical	Unassigned
Linaro GDB	Fix Released	Undecided	Unassigned
Linaro OpenEmbedded	Fix Released	Critical	Unassigned	Linaro OpenEmbedded 13.02

Bug Description

When trying to run the TBB tests in gdb after compiling (in oe12.12 on the foundation model):

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/libthread_db.so.1".
Error (step 1): Internal test error
Assertion k>=0 failed on line 129 of file ../../src/tbb/tbb_main.cpp
Detailed description: removed __TBB_InitOnce ref that was not added?
Cannot find user-level thread for LWP 531: capability not available
(gdb) bt
Target is executing.
(gdb) stop
(gdb) bt
Target is executing.

Test and required shared library attached.

Revision history for this message

Leif Lindholm (leif-lindholm) wrote on 2013-01-23:

Executable Edit (113.0 KiB, application/x-msdos-program)

Revision history for this message

Leif Lindholm (leif-lindholm) wrote on 2013-01-23:

Shared library. Edit (1.6 MiB, application/octet-stream)

Matthew Gretton-Dann (matthew-gretton-dann) on 2013-01-23

affects:

linaro-toolchain-misc → gdb-linaro

Revision history for this message

Matthew Gretton-Dann (matthew-gretton-dann) wrote on 2013-01-23:

A quick scan of the code suggests to me that this is actually a problem in glibc. td_ta_map_lwp2thr from libthread_db is returning DB_NOCAPAB for some reason. More investigation is needed.

Revision history for this message

Leif Lindholm (leif-lindholm) wrote on 2013-01-24:

This may be redundant information given Matt's latest comment, but I can verify that this also affects more recent builds using glibc 2.17.

Revision history for this message

Matthew Gretton-Dann (matthew-gretton-dann) wrote on 2013-01-24:

In Comment #3 s/DB_NOCAPAB/TD_NOCAPAB/

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Anmar Oueja (anmar) wrote on 2013-01-28:

This is blocking HHVM work in Linaro Enterprise Group (LEG).

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Yufeng Zhang (yufeng) wrote on 2013-01-30:

Hi Leif, would you mind attaching a libtbb_debug.so.2 built with glibc 2.17? It will be easier for me to verify the issue and fix without changing my local environment too much.

Thanks,
Yufeng

Revision history for this message

Leif Lindholm (leif-lindholm) wrote on 2013-01-31:

glibc 2.17 version of libtbb?debug.so Edit (1.6 MiB, application/octet-stream)

Anmar Oueja (anmar) on 2013-02-05

Changed in linaro-oe:
importance:	Undecided → Critical

Revision history for this message

Marcus Shawcroft (marcus-shawcroft) wrote on 2013-02-08:

This issue is resolved in native gdb by the most recent version of the aarch64-linux-nat patch, now committed on gdb master:

http://sourceware.org/ml/gdb-patches/2013-02/msg00186.html

The same issue was resolved in gdbserver by this patch (also now committed on master):

http://sourceware.org/ml/gdb-patches/2013-02/msg00151.html

Anyone cherry pick patches would also want to take this patch:

http://sourceware.org/ml/gdb-patches/2013-02/msg00152.html

/Marcus

Revision history for this message

Marcin Juszkiewicz (hrw) wrote on 2013-02-08:

#10

In other words: we need to update gdb to latest HEAD.

Marcin Juszkiewicz (hrw) on 2013-02-08

Changed in linaro-oe:
status:	New → Fix Committed
assignee:	nobody → Marcin Juszkiewicz (hrw)
milestone:	none → 13.02

Revision history for this message

Anmar Oueja (anmar) wrote on 2013-02-13:

#11

Marcin: When can the patches referenced in comment #9 can make it into the Linaro GDB builds? can we get a daily build with the fixes instead of waiting until the months' release?

Revision history for this message

Marcin Juszkiewicz (hrw) wrote on 2013-02-13:

#12

Anmar: ask TCWG not me.

Revision history for this message

Leif Lindholm (leif-lindholm) wrote on 2013-02-19:

#13

I can confirm that the fix included in Marcin's oe snapshot build 249 resolves my issue.

Marcin Juszkiewicz (hrw) on 2013-02-25

Changed in linaro-oe:
status:	Fix Committed → Fix Released

Riku Voipio (riku-voipio) on 2013-02-28

Changed in linaro-aarch64:
status:	New → Fix Committed

Riku Voipio (riku-voipio) on 2013-04-30

Changed in linaro-aarch64:
importance:	Undecided → Critical
status:	Fix Committed → Fix Released

Muhammad Omair Javaid (omair-javaid) on 2013-09-20

Changed in gdb-linaro:
status:	New → Fix Released

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