pulseaudio applications crash under linux-user-x86_64

[Bla Blub]

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. :-)

[Thomas Huth (th-huth)]

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