[Qemu-devel] [Bug 955379] [NEW] cmake hangs with qemu-arm-static

[Qemu-devel] [Bug 955379] [NEW] cmake hangs with qemu-arm-static

[Tom Mullins]

Public bug reported:

I'm using git commit 3e7ecd976b06f... configured with --target-list=arm-
linux-user --static in a chroot environment to compile some things. I
ran into this problem with both pcl and opencv-2.3.1. cmake consistently
freezes at some point during its execution, though in a different spot
each time, usually during a step when it's searching for some libraries.
For instance, pcl most commonly stops after:

[snip]
-- Boost version: 1.46.1
-- Found the following Boost libraries:
--   system
--   filesystem
--   thread
--   date_time
-- checking for module 'eigen3'
--   found eigen3, version 3.0.1

which is perplexing because it freezes after finding what it wants, not
during the search. When it does get past that point, it does so almost
immediately but freezes somewhere else.

I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic with
an Intel i5.

** Affects: qemu
     Importance: Undecided
         Status: New

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

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[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[David Sugar]

I have found several places cmake may hang, with either qemu-arm-static
or mipsel, and in debian (testing) as well as in Ubuntu.  One of them is
the cmake check for c++ compiler, which can be overridden.  Things that
use cmake's pkg_check_modules and pkg-config files will also hang.
Curiously, outside of cmake, equivs also will similarly hang if used.
All these things can make it very difficult to use qemu user static
driven chroot's or qemu pbuilder for pkg building at present.

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Ricardo Salveti]

** Also affects: qemu-linaro
   Importance: Undecided
       Status: New

** Also affects: qemu-linaro (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New
Status in Linaro QEMU:
  New
Status in “qemu-linaro” package in Ubuntu:
  New

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Tim Penhey]

I am also having this issue with latest qemu on quantal using an armhf
chroot.

cmake will occasionally finish, but mostly it just hangs, most often in
the pkg_check bits.

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New
Status in Linaro QEMU:
  New
Status in “qemu-linaro” package in Ubuntu:
  New

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Ricardo Salveti]

I can confirm that this is still an issue even with latest qemu-linaro,
from Quantal (1.2.0-2012.09-0ubuntu1).

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New
Status in Linaro QEMU:
  New
Status in “qemu-linaro” package in Ubuntu:
  New

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

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[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

If you can provide a simple straightforward reproduce case that would be
useful.

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New
Status in Linaro QEMU:
  New
Status in “qemu-linaro” package in Ubuntu:
  New

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: qemu-linaro (Ubuntu)
       Status: New => Confirmed

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New
Status in Linaro QEMU:
  New
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Tim Penhey]

Peter, if you try to run the cmake file for lp:unity you should hit it.

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New
Status in Linaro QEMU:
  New
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

Re: [Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

On 25 November 2012 20:40, Tim Penhey <tim.penhey@canonical.com> wrote:
> Peter, if you try to run the cmake file for lp:unity you should hit it.

I'm afraid that's way too little detail. Assume I know nothing about
launchpad, cmake or unity, and give me a set of instructions I
can run on a machine which isn't necessarily running ubuntu to
reproduce this, preferably with as small and limited a repro case
as possible. At least, it should be a command line that starts
out "qemu <some stuff>"...

thanks
-- PMM

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Janne Karhunen]

Peter, I have qemu chrootable test case under which you could fire one
command to hit the bug reliably. Only issue is, are you willing to take
a peek at 100M extractable tarball? If not, I'll try to create a smaller
one.

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New
Status in Linaro QEMU:
  New
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

Re: [Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

On 28 November 2012 08:42, Janne Karhunen <955379@bugs.launchpad.net> wrote:
> Peter, I have qemu chrootable test case under which you could fire one
> command to hit the bug reliably. Only issue is, are you willing to take
> a peek at 100M extractable tarball? If not, I'll try to create a smaller
> one.

Yeah, 100M repro case tarball is manageable.

-- PMM

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Janne Karhunen]

Ok, test case attached (80M tar). This hugely stripped one is not 100% reproducer, but do few loops and you will hit it. Instructions for using:
- extract, chroot
- cd /home/abuild/rpmbuild
- su abuild
- export RPM_BUILD_ROOT=$PWD
- rpmbuild -ba SOURCES/libshortcut.spec


** Attachment added: "Tizen chroot"
   https://bugs.launchpad.net/qemu/+bug/955379/+attachment/3446633/+files/root5-small.tar.bz2

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New
Status in Linaro QEMU:
  New
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Janne Karhunen]

Mind you, when you hit the bug it just hangs and cmake test errors are
just to speed up the process of hitting the bug (if cmake just fails you
did not hit the bug). Feel free to try with any qemu variant, they all
hang similarly when bug is hit. I think that root had some suse 1.2 one
inside.

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New
Status in Linaro QEMU:
  New
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

That test case seems to have very weak reproducibility -- I think I saw
a hang perhaps once in 30+ runs. That's not really usable for debugging,
I'm afraid :-(

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New
Status in Linaro QEMU:
  New
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Janne Karhunen]

If that is the case for you (for me it reproduces it every 4-5 runs or so), there are two options:
1) put while(true) loop around the rpmbuild and you will hit it always, or
2) I can wrap up a bit bigger cmake usecase that systematically hits it. Warn you though, size will jump to 200M.

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New
Status in Linaro QEMU:
  New
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

I'll take the bigger usecase, please. It's pretty hard to debug race
conditions that don't manifest often enough to let you do useful
logging.

>From the time or two I caught it hanging, it looks like qemu is sleeping in poll, and there's a zombie child process. I wonder if what's happening is that the SIGCHLD is coming in just before syscall.c executes the poll syscall, so that qemu queues the signal for delivery to the guest (but never actually delivers it) and then enters a poll syscall that won't return (because the SIGCHLD has already arrived). If so, fixing this would require the significant redesign sketched out here:
http://lists.gnu.org/archive/html/qemu-devel/2011-12/msg00384.html

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New
Status in Linaro QEMU:
  New
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

Actually I just managed to interact with a hung qemu under a debugger
sufficiently to confirm what is happening here.

CMake's code for running child processes (in kwsys/ProcessUNIX.c) does this:
"On UNIX, a child process is forked to exec the program.  Three output pipes are read by the parent process using a select call to block until data are ready.  Two of the pipes are stdout and stderr for the child.  The third is a special pipe populated by a signal handler to indicate that a child has terminated.  This is used in conjunction with the timeout on the select call to implement a timeout for program even when it closes stdout and stderr and at the same time avoiding races."

So (assuming no timeout set up) we can get the following race:
 * spawn child process
 * parent gets to point of making select() syscall
 * this takes the parent process into qemu's linux-user/main.c code
 * child process exits
 * host kernel sends SIGCHLD to parent
 * qemu's signal handler queues this SIGCHLD and does a cpu_exit, which will make the parent take the signal at the next basic block
 * parent code (still inside main.c or syscall.c) does the actual host select() syscall
 * this blocks forever, because the thing that would wake it up is the signal handler writing to the pipe we're selecting on, but we will never run the signal handler until select exits

Fixing this bug will indeed require the significant rework I referred to
in comment #14, I'm afraid. Don't hold your breath...

-- 
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New
Status in Linaro QEMU:
  New
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Janne Karhunen]

> this blocks forever, because the thing that would wake it up is the
signal handler writing to the pipe we're selecting on, but we will never
run the signal handler until select exits

Duh, makes sense, have to think about this. Thank you for great analysis
:)

Apparently have to dig into qemu's code to understand this better, but
first thought was that do you think it would be possible to add some
crude hack bit in qemu's signal handler which we could 'almost
atomically' check prior to entering system poll/select/read/whatnot ?
This bit would tell there are user signals queued and handlers should be
executed first.. ?

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  New
Status in Linaro QEMU:
  New
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

Re: [Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

On 1 December 2012 10:29, Janne Karhunen <955379@bugs.launchpad.net> wrote:
>> this blocks forever, because the thing that would wake it up is the
> signal handler writing to the pipe we're selecting on, but we will never
> run the signal handler until select exits
>
> Duh, makes sense, have to think about this. Thank you for great analysis
> :)
>
> Apparently have to dig into qemu's code to understand this better, but
> first thought was that do you think it would be possible to add some
> crude hack bit in qemu's signal handler which we could 'almost
> atomically' check prior to entering system poll/select/read/whatnot ?
> This bit would tell there are user signals queued and handlers should be
> executed first.. ?

Nope, it's still not going to be non-racy that way (and it would still
be a pretty invasive change so it doesn't really make it easier either
I think).

-- PMM

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

** Changed in: qemu
       Status: New => Confirmed

** Changed in: qemu-linaro
       Status: New => Confirmed

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

Re: [Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Alexander Graf]

On 01.12.2012, at 12:27, Peter Maydell wrote:

> On 1 December 2012 10:29, Janne Karhunen <955379@bugs.launchpad.net> wrote:
>>> this blocks forever, because the thing that would wake it up is the
>> signal handler writing to the pipe we're selecting on, but we will never
>> run the signal handler until select exits
>> 
>> Duh, makes sense, have to think about this. Thank you for great analysis
>> :)
>> 
>> Apparently have to dig into qemu's code to understand this better, but
>> first thought was that do you think it would be possible to add some
>> crude hack bit in qemu's signal handler which we could 'almost
>> atomically' check prior to entering system poll/select/read/whatnot ?
>> This bit would tell there are user signals queued and handlers should be
>> executed first.. ?
> 
> Nope, it's still not going to be non-racy that way (and it would still
> be a pretty invasive change so it doesn't really make it easier either
> I think).

Could you please try and see if this patch makes a difference?

http://repo.or.cz/w/qemu/agraf.git/patch/489924aa0115dc6cfcd4e91b0747da4ff8425d1f


Alex

Re: [Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

On 3 December 2012 21:20, Alexander Graf <agraf@suse.de> wrote:
> Could you please try and see if this patch makes a difference?
>
> http://repo.or.cz/w/qemu/agraf.git/patch/489924aa0115dc6cfcd4e91b0747da4ff8425d1f

I think the answer will turn out to be "no" (though it's worth
testing anyway), because the syscall we're blocking in in this
case is select(), which is a syscall which will exit when a
signal arrives anyway. That is, I think we're really hitting
the race condition of the signal arriving while we're in QEMU's
C code, rather than the stuck-in-blocking-syscall of the boehm
GC case.

-- PMM

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Janne Karhunen]

So I guess 'raciness' of my proposed patch would only depend on how
small I could squeeze the section between 'sigpending' flag comparison
and actual syscall entering?

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

Yes. You can never shut the window completely trying to do it that way,
which is why you need fix the problem properly instead.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Janne Karhunen]

And what would break if we make poll timeout instantly in case there are
signals pending and restart the given syscall after handlers run?

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

Re: [Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

On 4 December 2012 11:21, Janne Karhunen <955379@bugs.launchpad.net> wrote:
> And what would break if we make poll timeout instantly in case there are
> signals pending and restart the given syscall after handlers run?

If there are signals pending in the host kernel poll will *already*
return immediately. If there is a signal pending in the QEMU signal
queue (because the host kernel just delivered it to us) then there
will always be a window between the point where you say "ok, queue
is empty" and actually doing the host syscall, where a signal could
be delivered and put in the queue. You cannot fix this bug in the way
you are trying to: you must handle this case by longjumping out of
the signal handler. I've already sketched the correct design for
fixing this.

[to anybody in the peanut gallery who is thinking about pselect()
now: yes, you could perhaps hack something up with that, but it would
still be a big patch with a bunch of corner cases to review, and
it would only fix this bug for this particular syscall, not in
general.]

-- PMM

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Janne Karhunen]

Moreover, is there even a need to restart anything, just make it async
call in case signals were pending?

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Janne Karhunen]

Never mind, async/zero timeout call would suffer from same (albeit now
tiny) race. It would make this far less invasive as a change though.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Janne Karhunen]

Just out of interest tried how far the timeout hackery can go working
around the issue. Well, looks like it goes quite far: having previously
reproduced the hang in 4-5 runs and in under a minute, now have had this
running without a hang for an hour. I will also test the patch under OBS
worker(s) and if it solves the issue there as well, I will attach it as
a workaround for time being for those interested. However, Peter is
right and this is not a final solution of any kind: just a workaround.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Janne Karhunen]

Some kind of semi-workaround patch attached. It seems to leave this kind
of race window for me (for select which is worse):

   0x000000006004bf98 <+136>:   xor    %r8d,%r8d
   0x000000006004bf9b <+139>:   test   %eax,%eax
   0x000000006004bf9d <+141>:   jne    0x6004c2b7 <do_select+935>
   0x000000006004bfa3 <+147>:   mov    0x20(%rsp),%r14
   0x000000006004bfa8 <+152>:   mov    0x246d8(%r14),%esi
   0x000000006004bfaf <+159>:   test   %esi,%esi
   0x000000006004bfb1 <+161>:   je     0x6004bfb8 <do_select+168>
   0x000000006004bfb3 <+163>:   lea    0x40(%rsp),%r8
   0x000000006004bfb8 <+168>:   mov    0x28(%rsp),%rdx
   0x000000006004bfbd <+173>:   mov    %r11,%rsi
   0x000000006004bfc0 <+176>:   mov    %ebx,%edi
   0x000000006004bfc2 <+178>:   callq  0x6012df90 <select>

I think it could still be narrowed some, but this makes it unlikely
enough for me for time being...

** Patch added: "racy workaround patch"
   https://bugs.launchpad.net/qemu/+bug/955379/+attachment/3452139/+files/cmake.patch

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Ubuntu Foundations Team Bug Bot]

The attachment "racy workaround patch" of this bug report has been
identified as being a patch.  The ubuntu-reviewers team has been
subscribed to the bug report so that they can review the patch.  In the
event that this is in fact not a patch you can resolve this situation by
removing the tag 'patch' from the bug report and editing the attachment
so that it is not flagged as a patch.  Additionally, if you are member
of the ubuntu-reviewers team please also unsubscribe the team from this
bug report.

[This is an automated message performed by a Launchpad user owned by
Brian Murray.  Please contact him regarding any issues with the action
taken in this bug report.]

** Tags added: patch

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Luke Kim]

I have tested cmake.patch but it doesn't work for me.
It didn't hang but it failed to run gmake.
I applied this patch onto qemu-1.3.

[   52s] -- Detecting CXX compiler ABI info
[   53s] CMake Error: Generator: execution of make failed. Make command was: /usr/bin/gmake "cmTryCompileExec/fast"
[   53s] -- Detecting CXX compiler ABI info - failed

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Janne Karhunen]

Luke Kim: quite unlikely that above patch would cause the issue you
see..  are you sure something else did not break in your environment?
Can you execute that same make manually?

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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Luke Kim]

Janne Karhunen: Do you think if it is correct that return 0 when ts->signal_pending is true and select() returns '0' (timeout)? Because the caller doesn't expect to return select() with 0, should we return other error values such as EINTR?
When I modified you patch to return EINTR if select() return '0' when ts->signal_pending is true, it worked fine with me.

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You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Janne Karhunen]

LK: Ok, good catch, that might be more suitable option. Thanks,

-- 
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Luke Kim]

Isn't it fixed yet with latest qemu 2.1 rc?

-- 
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

No; this is a a complicated issue to fix that basically requires a
significant restructuring of the linux-user code. Nobody's done that yet
and as far as I know nobody's said they plan to do so either.

-- 
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[vitaly.v.ch]

It's just excellent illustration why I hate pipes.

So CMake guys can remove this crap from their code and use socketpair()
or like instead.

-- 
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[vitaly.v.ch]

https://lists.tizen.org/pipermail/dev/2014-July/003424.html

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

What cmake is doing is an entirely legitimate and well-recognized Unix
idiom for converting signals into effects on filedescriptors for
select(), and there's no reason for them to change it. This is
absolutely a bug in QEMU, it's just one that's not easy for us to fix.
(Using socketpair would not help here. You'd have to use signalfd(),
which of course is much less portable.)

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

Most rececnt qemu-devel discussion and a promising looking approach (ie it would work whereas my idea linked from comment #14 would not):
http://lists.gnu.org/archive/html/qemu-devel/2014-02/msg04569.html

-- 
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in “qemu-linaro” package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[skunk]

the above patch still applies with qemu 2.4, but then it fails to build
with the following error:

x86_64-pc-linux-gnu-gcc -I/var/tmp/portage/app-emulation/qemu-2.4.0-r1/work/qemu-2.4.0/tcg -I/var/tmp/portage/app-emulation/qemu-2.4.0-r1/work/qemu-2.4.0/tcg/i386 -I/var/tmp/portage/app-emulation/qemu-2.4.0-r1/work/qemu-2.4.0/linux-headers -I/var/tmp/portage/app-emulation/qemu-2.4.0-r1/work/qemu-2.4.0/user-build/linux-headers -I. -I/var/tmp/portage/app-emulation/qemu-2.4.0-r1/work/qemu-2.4.0 -I/var/tmp/portage/app-emulation/qemu-2.4.0-r1/work/qemu-2.4.0/include -I/var/tmp/portage/app-emulation/qemu-2.4.0-r1/work/qemu-2.4.0/linux-user -Ilinux-user -m64 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fno-common  -Wendif-labels -Wmissing-include-dirs -Wempty-body -Wnested-externs -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-declaration -Wold-style-definition -Wtype-limits -fstack-protector-strong  -I../linux-headers -I.. -I/var/tmp/portage/app-emulation/qemu-2.4.0-r1/work/qemu-2.4.0/target-i386 -DNEED_CPU_H -I/var/tmp/portage/app-emulation/qemu-2.4.0-r1/work/qemu-2.4.0/include -I/var/tmp/portage/app-emulation/qemu-2.4.0-r1/work/qemu-2.4.0/linux-user/x86_64 -I/var/tmp/portage/app-emulation/qemu-2.4.0-r1/work/qemu-2.4.0/linux-user -MMD -MP -MT linux-user/syscall.o -MF linux-user/syscall.d -pthread -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include   -march=native -mtune=generic -O2 -pipe  -c -o linux-user/syscall.o /var/tmp/portage/app-emulation/qemu-2.4.0-r1/work/qemu-2.4.0/linux-user/syscall.c
/var/tmp/portage/app-emulation/qemu-2.4.0-r1/work/qemu-2.4.0/linux-user/syscall.c: In function ‘do_select’:
/var/tmp/portage/app-emulation/qemu-2.4.0-r1/work/qemu-2.4.0/linux-user/syscall.c:1010:34: error: ‘thread_env’ undeclared (first use in this function)
     TaskState *ts = (TaskState *)thread_env->opaque;
                                  ^
/var/tmp/portage/app-emulation/qemu-2.4.0-r1/work/qemu-2.4.0/linux-user/syscall.c:1010:34: note: each undeclared identifier is reported only once for each function it appears in

anybody so kind to tell me how to fix it?
thank you.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

Recent patchseries which I think ought to be a proper fix for this bug:
https://lists.gnu.org/archive/html/qemu-devel/2015-09/msg01388.html
It does need some more work to address review comments but it's sound in principle.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[skunk]

thank you peter, do you know if timothy has a github account?
i'm too lazy to copy&paste the 34 patches by hand from the mailing list...

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

Re: [Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Crosthwaite]

On Sat, Sep 19, 2015 at 4:31 PM, skunk <skunk@legalise.it> wrote:
> thank you peter, do you know if timothy has a github account?
> i'm too lazy to copy&paste the 34 patches by hand from the mailing list...

The patches utility can do this for you off the list:

https://github.com/stefanha/qemu-patches

Regards,
Peter

>
> --
> You received this bug notification because you are a member of qemu-
> devel-ml, which is subscribed to QEMU.
> https://bugs.launchpad.net/bugs/955379
>
> Title:
>   cmake hangs with qemu-arm-static
>
> Status in QEMU:
>   Confirmed
> Status in Linaro QEMU:
>   Confirmed
> Status in qemu-linaro package in Ubuntu:
>   Confirmed
>
> Bug description:
>   I'm using git commit 3e7ecd976b06f... configured with --target-list
>   =arm-linux-user --static in a chroot environment to compile some
>   things. I ran into this problem with both pcl and opencv-2.3.1. cmake
>   consistently freezes at some point during its execution, though in a
>   different spot each time, usually during a step when it's searching
>   for some libraries. For instance, pcl most commonly stops after:
>
>   [snip]
>   -- Boost version: 1.46.1
>   -- Found the following Boost libraries:
>   --   system
>   --   filesystem
>   --   thread
>   --   date_time
>   -- checking for module 'eigen3'
>   --   found eigen3, version 3.0.1
>
>   which is perplexing because it freezes after finding what it wants,
>   not during the search. When it does get past that point, it does so
>   almost immediately but freezes somewhere else.
>
>   I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
>   with an Intel i5.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions
>

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[skunk]

ok, i've found a better place for patchset download:

https://patchwork.ozlabs.org/project/qemu-
devel/list/?submitter=Timothy+Baldwin&q=linux-user

unfortunately cmake still hangs in a way that even sending SIGCHLD
doesn't wake it up, i have to send SIGKILL to stop it and consequently
breaking the build process...

please let me know if there's something else i could try.

thank you.

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

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https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

Does anybody have a reliable reproduce case for this bug? I have some
patches I'd like to test which I think should fix it, but I cannot get
the test case attached in comment #10 to hang at all, even without the
fixes.

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[skunk]

iirc i've was able to reproduce this bug every time while compiling
kdelibs4 on a chrooted arm image

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

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[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

I was hoping for a "run this command" level of reproducer :-)

Alternatively, if anybody's conveniently able to build and test a new QEMU with whatever was failing for them, you can try the git branch
https://git.linaro.org/people/peter.maydell/qemu-arm.git sigrace-fixes

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Jools Wills]

I get a hang doing this most times in an emulated ARM chroot with qemu-
arm-static (Raspbian). Host machine is x86_64 Ubuntu 16.04 running qemu
2.5.0.

git clone --depth 1 https://github.com/libretro/picodrive.git
cd picodrive && 
git submodule update --init

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

Thanks for that report of a hang running git. I've been able to identify and fix the bug (it is a different problem to the issue that was causing cmake to hang) and have sent a patch:
http://patchwork.ozlabs.org/patch/631708/
That fix will hopefully make it into QEMU 2.7.

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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Jools Wills]

That's great news - thanks very much. This will make working on RetroPie
development in a chroot much easier (we have workarounds to avoid using
git because of this issue).

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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Riku Voipio]

Please try the latest qemu git HEAD, Timothys and Peters fixes have been
merged in.

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Riku Voipio]

A prebuilt package of qemu-user built statically at:

http://repo.linaro.org/ubuntu/linaro-tools/pool/main/q/qemu/qemu-user-
static_2.6.0+git931+g9bbbf64-1linarojessie1_amd64.deb

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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Luke Kim]

That's great! it works for me. Thanks a lot.

-- 
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Confirmed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

I'm going to mark this bug as 'fix committed', because changes which
should fix both the cmake and the git hang are now in QEMU git master.
If people have test cases for things which still fail on current git
master, please open fresh bugs for them.


** Changed in: qemu
       Status: Confirmed => Fix Committed

-- 
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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Committed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Luke Kim]

I'm so sorry that
cmake still hang with my Ubuntu 12.04 and openSUSE 12.3 machine.
and the hanging point has changed. cmake hung at select() with old qemu. but now cmake hang at pselect6() with new qemu.
And also I could continue build by sending SIGCHLD to hanging qemu. but now cmake still hang even I send SIGCHLD to hanging qemu.

-- 
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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Committed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

Please can you (a) double check that you're definitely running the
correct new QEMU and (b) provide exact reproduction instructions so I
can investigate the hang.

-- 
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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Committed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Luke Kim]

I test with b66e10e4c9ae738412b9742db49457f6b703e349 before.
I test with 14c7d99333e4a474c65bdae6f99aa8837e8078e6 today and no hang.
But I had to revert 4fb8320a2efb2216c7ddcc929ad0362f4e285681 which causes segfault.

-- 
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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Committed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

Please provide exact reproduction instructions -- I need enough
information that I can completely replicate your setup and what you're
doing: exactly how you've set up any chroot or whatever other guest
setup you have, what cmake command you're running, and so on.

-- 
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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Committed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Luke Kim]

chroot env. attached (120M tar).
I hope you can reproduce with this chroot.

Instructions to reproduce
- extract, chroot
- su - abuild
- cd /home/abuild/rpmbuild/BUILD/cmake-2.8.5/armv7l-tizen-linux-gnueabi/
- Bootstrap.cmk/cmake .. -CBootstrap.cmk/InitialCacheFlags.cmake '-GUnix Makefiles' -DCMAKE_BOOTSTRAP=1

** Attachment added: "Tizen 2.4 chroot"
   https://bugs.launchpad.net/qemu/+bug/955379/+attachment/4701930/+files/root.tar.gz

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Committed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

Thanks for that test case; unfortunately it works fine for me (both with
current git master and with commit b66e10e4c9ae7384).

Can you tell me what host machine you're running this on, and in
particular whether it is 32 bit or 64 bit? Commit b66e10e4c9ae7384 will
fix this hang for x86-64 (64-bit intel) hosts, but it will only be fixed
for 32-bit intel hosts by commit 3e904d6ade7 (which also fixes this for
aarch64, arm, ppc64 and s390x hosts).

If you are using a 32-bit x86 host that would explain the failure-vs-
success that you report in comment #56. I suspect from looking at the
qemu binaries that were in your test case tarball that you are using
32-bit.

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Committed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Luke Kim]

Thanks for your feedback.
I was running this on intel i7 Ubuntu 64bit.
but I used 32bit qemu as you suspected.

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Committed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

OK, so the behaviour you saw is expected since we didn't fix 32-bit
hosts until a bit later; but they should both be fixed now.

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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Committed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Luke Kim]

Hello, Peter Maydell
we have new qemu-arm hang issue.
I guess you are busy for new qemu 2.7 release.
But, could you please help us if you have time?

https://bugs.launchpad.net/qemu/+bug/1617929

Very thank you in advance :-)

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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Committed
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[T. Huth]

Fixes should be part of QEMU v2.7.0, e.g.:
http://git.qemu.org/?p=qemu.git;a=commitdiff;h=014628a705bdaf31c09915
... so setting the status to "Fix Released" now.

** Changed in: qemu
       Status: Fix Committed => Fix Released

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Released
Status in Linaro QEMU:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[TJ]

** Also affects: qemu (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: qemu (Ubuntu)
       Status: New => Confirmed

** Changed in: qemu (Ubuntu)
    Milestone: None => ubuntu-16.04.5

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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Released
Status in Linaro QEMU:
  Confirmed
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[David Lechner]

I am seeing the same symptoms as the original poster. I'm building the
opencv package in a debian stretch armfh chroot on a ubuntu bionic amd64
host. So, I'm guessing that the race condition wasn't entirely fixed or
there has been some sort of regression.

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Released
Status in Linaro QEMU:
  Confirmed
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

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https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[David Lechner]

Steps to reproduce:

# on ubuntu bionic amd64 host
sudo apt-add-repository ppa:ev3dev/tools
# assuming apt-add-repository does apt update now
sudo apt install pbuilder-ev3dev git
git clone --depth=1 https://github.com/ev3dev/opencv
cd opencv
OS=debian ARCH=armhf DIST=stretch pbuilder-ev3dev base
OS=debian ARCH=armhf DIST=stretch pbuilder-ev3dev dev-build

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Released
Status in Linaro QEMU:
  Confirmed
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu-linaro package in Ubuntu:
  Confirmed

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[ChristianEhrhardt]

** Also affects: qemu (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: qemu-linaro (Ubuntu Xenial)
   Importance: Undecided
       Status: New

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Released
Status in Linaro QEMU:
  Confirmed
Status in qemu package in Ubuntu:
  Fix Released
Status in qemu-linaro package in Ubuntu:
  Confirmed
Status in qemu source package in Xenial:
  Incomplete
Status in qemu-linaro source package in Xenial:
  New

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

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[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[ChristianEhrhardt]

That means our assumption taken in comment #63 that it was fixed in
http://git.qemu.org/?p=qemu.git;a=commitdiff;h=014628a705bdaf31c09915
either was wrong (unset fix released) - or this is a similar but not the
same issue (which would imply a new bug since this already has plenty of
potentially mismatching history).

Given the time this was considered closed I'd vote for a new bug to analyze things from scratch.
@David - would you mind opening a new bug?

@TJ - before considering backporting something of the current solution to xenial, (all other releases are >=2.7) would you mind testing e.g. qemu 2.10 via [1].
Also a trivial reproducer will help to make this SRUable, like David added his (for the probably new issue). Or is the one in comment #58 representing your case as well?

[1]: https://wiki.ubuntu.com/OpenStack/CloudArchive#Pike

** Changed in: qemu (Ubuntu Xenial)
       Status: New => Incomplete

** Changed in: qemu (Ubuntu)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Released
Status in Linaro QEMU:
  Confirmed
Status in qemu package in Ubuntu:
  Fix Released
Status in qemu-linaro package in Ubuntu:
  Confirmed
Status in qemu source package in Xenial:
  Incomplete
Status in qemu-linaro source package in Xenial:
  New

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[David Lechner]

I have filed a new bug:
https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1764555

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https://bugs.launchpad.net/bugs/955379

Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Released
Status in Linaro QEMU:
  Confirmed
Status in qemu package in Ubuntu:
  Fix Released
Status in qemu-linaro package in Ubuntu:
  Confirmed
Status in qemu source package in Xenial:
  Incomplete
Status in qemu-linaro source package in Xenial:
  New

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Łukasz Zemczak]

What's the status of this bug? I see LP: #1764555 has been marked as invalid as the test environment was tainted - does this imply the fix was correct and everything is working as intended?
The bug is marked for 16.04.5. If it's still something we intent to get released for the point-release we would need someone to prepare an SRU as soon as possible.

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Released
Status in Linaro QEMU:
  Confirmed
Status in qemu package in Ubuntu:
  Fix Released
Status in qemu-linaro package in Ubuntu:
  Confirmed
Status in qemu source package in Xenial:
  Incomplete
Status in qemu-linaro source package in Xenial:
  New

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions

[Qemu-devel] [Bug 955379] Re: cmake hangs with qemu-arm-static

[Peter Maydell]

>From upstream QEMU's point of view the status of this bug is "it's an
old bug report that tended to accumulate 'this seems like it's the same
as my bug' extra comments; we have fixed the underlying cause of the
original bug,  so leave this one closed and file new ones with proper
reproducer instructions if necessary".

LP: #1764555 was closed because it was "bug submitter was still running
the old QEMU version and didn't realise it".

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Title:
  cmake hangs with qemu-arm-static

Status in QEMU:
  Fix Released
Status in Linaro QEMU:
  Confirmed
Status in qemu package in Ubuntu:
  Fix Released
Status in qemu-linaro package in Ubuntu:
  Confirmed
Status in qemu source package in Xenial:
  Incomplete
Status in qemu-linaro source package in Xenial:
  New

Bug description:
  I'm using git commit 3e7ecd976b06f... configured with --target-list
  =arm-linux-user --static in a chroot environment to compile some
  things. I ran into this problem with both pcl and opencv-2.3.1. cmake
  consistently freezes at some point during its execution, though in a
  different spot each time, usually during a step when it's searching
  for some libraries. For instance, pcl most commonly stops after:

  [snip]
  -- Boost version: 1.46.1
  -- Found the following Boost libraries:
  --   system
  --   filesystem
  --   thread
  --   date_time
  -- checking for module 'eigen3'
  --   found eigen3, version 3.0.1

  which is perplexing because it freezes after finding what it wants,
  not during the search. When it does get past that point, it does so
  almost immediately but freezes somewhere else.

  I'm using 64-bit Ubuntu 11.10 with kernel release 3.0.0-16-generic
  with an Intel i5.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/955379/+subscriptions