[Bug 1563612] Re: pulseaudio applications crash under linux-user-x86_64

[Thomas Huth]

The QEMU project is currently considering to move its bug tracking to another 
system. For this we need to know which bugs are still valid and which could be 
closed already. Thus we are setting older bugs to "Incomplete" now.
If you still think this bug report here is valid, then please switch the state 
back to "New" within the next 60 days, otherwise this report will be marked as 
"Expired". Or mark it as "Fix Released" if the problem has been solved with a 
newer version of QEMU already. Thank you and sorry for the inconvenience.

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

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Title:
  pulseaudio applications crash under linux-user-x86_64

Status in QEMU:
  Incomplete

Bug description:
  Running a simple application that uses pulseaudio under qemu-i386 or
  qemu-x86_64 makes it crash (tested on Debian 8.0):

  # apt-get install build-essential qemu-user libpulse-dev pulseaudio
  $ cat > test.c << __EOF
  #include <pulse/simple.h>

  int main(void) {
        pa_simple *s;
        pa_sample_spec ss;
        ss.format = PA_SAMPLE_S16NE;
        ss.channels = 2;
        ss.rate = 44100;
        s = pa_simple_new(NULL,               // Use the default server.
                          "Fooapp",           // Our application's name.
                          PA_STREAM_PLAYBACK,
                          NULL,               // Use the default device.
                          "Music",            // Description of our stream.
                          &ss,                // Our sample format.
                          NULL,               // Use default channel map
                          NULL,               // Use default buffering
                                              // attributes.
                          NULL                // Ignore error code.
                        );

        int16_t buf[2 * 1000];
          int i;
          memset(buf, 0, sizeof buf);
        for (i = 0; i < 44; i++) {
                pa_simple_write(s, buf, sizeof buf, NULL);
        }

          pa_simple_free(s);

        return 0;
  }
  __EOF
  $ gcc test.c -o test -lpulse -lpulse-simple
  $ ./test
  <no output, no error>
  $ qemu-x86_64 ./test
  qemu: uncaught target signal 11 (Segmentation fault) - core dumped
  Segmentation fault
  $

  
  I think this is related to the futex system call. In an attempt to debug the 
problem, I compiled pulseaudio in debug mode and it hit an assertion failure in 
pa_mutex_unlock.

  Thank you for developing QEMU.  :-)

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