[Qemu-devel] [Bug 1776478] Re: Getting qemu: uncaught target signal 6 when running lv2 plugin cross-compilation

From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [Bug 1776478] Re: Getting qemu: uncaught target signal 6 when running lv2 plugin cross-compilation
Date: Wed, 25 Jul 2018 16:45:33 -0000	[thread overview]
Message-ID: <153253713353.2571.4909342648199720691.malone@wampee.canonical.com> (raw)
In-Reply-To: 152880770129.26761.1762643804065210181.malonedeb@gac.canonical.com

It wants debug symbols for the guest binary, not for QEMU. As it
suggests, the "file" command pointed at the guest binary ought to help.

This commandline isn't right, incidentally:
  gdb-multiarch target remote :1234

"target remote :1234" is a command for the gdb prompt, not a set of
command line arguments (gdb tells you it's harmlessly ignored these
arguments).

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https://bugs.launchpad.net/bugs/1776478

Title:
  Getting qemu: uncaught target signal 6 when running  lv2 plugin cross-
  compilation

Status in QEMU:
  New

Bug description:
  Hey,
  I am part of the Zynthian team and we use qemu-arm-static to cross compile lv2 audio plugins.

  When running a compilation of DISTRHO-Ports we get:

  lv2_ttl_generator: pthread_mutex_lock.c:81: __pthread_mutex_lock: Assertion `mutex->__data.__owner == 0' failed.
  qemu: uncaught target signal 6 (Aborted) - core dumped
  ./scripts/generate-ttl.sh: line 27: 16524 Aborted                 $GEN ./$FILE
  Makefile:62: recipe for target 'gen_lv2' failed
  make[1]: *** [gen_lv2] Error 134
  make[1]: Leaving directory '/home/pi/zynthian-sw/plugins/DISTRHO-Ports'
  Makefile:104: recipe for target 'lv2' failed
  make: *** [lv2] Error 2

  lv2_ttl_generator source is here:
  https://github.com/DISTRHO/DISTRHO-Ports/tree/master/libs/lv2-ttl-generator

  The command that is ruining is
  lv2_ttl_generator ./TAL-Filter-2.so 

  And ./TAL-Filter-2.so source is here:
  https://github.com/DISTRHO/DISTRHO-Ports/tree/master/ports/tal-filter-2/source

  Is there a way to debug what is going on?
  This runs fine on a Raspberrypi which is armv7

  A workaround would also help.

  Bug in Zynthian:
  https://github.com/zynthian/zynthian-sys/issues/59
  Bug in DISTRHO-Ports:
  https://github.com/DISTRHO/DISTRHO-Ports/issues/29

  Using qemu-arm-static version from master from two days ago:
  qemu-arm version 2.12.50 (v2.12.0-1182-ga7a7309ca5-dirty), commit: a7a7309ca52c327c6603d60db90ae4feeae719f7

  Also saw this in qemu-arm version 2.12.0 (Debian 1:2.12+dfsg-3)

  Thanks,
  Guy

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