[Mesa-dev] [Bug 94088] [llvmpipe] SIGFPE pthread_barrier_destroy.c:40

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94088

            Bug ID: 94088
           Summary: [llvmpipe] SIGFPE pthread_barrier_destroy.c:40
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Mesa core
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: vlee at freedesktop.org
        QA Contact: mesa-dev at lists.freedesktop.org

glxinfo crashes with LP_NUM_THREADS=0 with glibc-2.22.

mesa: 6ee1c386fe8c9b45746e5bbb8a6f9b56da45fd50 (master 11.2.0-devel)

$ glxinfo
[...]
Floating point exception (core dumped)

(gdb) bt
#0  0x00007f1d95b89f79 in pthread_barrier_destroy (
    barrier=barrier at entry=0x565112e8e730) at pthread_barrier_destroy.c:40
#1  0x00007f1d94dbe83f in pipe_barrier_destroy (barrier=0x565112e8e730)
    at ../../../../src/gallium/auxiliary/os/os_thread.h:155
#2  lp_rast_destroy (rast=0x565112e8d010) at lp_rast.c:970
#3  0x00007f1d94dcdbd1 in llvmpipe_destroy_screen (_screen=0x565112e8cef0)
    at lp_screen.c:525
#4  0x00007f1d9497ac6f in dri_destroy_screen_helper (
    screen=screen at entry=0x565112e8cd50) at dri_screen.c:380
#5  0x00007f1d9497ad15 in dri_destroy_screen (sPriv=0x565112e1df80)
    at dri_screen.c:391
#6  0x00007f1d94978d72 in driDestroyScreen (psp=0x565112e1df80)
    at dri_util.c:229
#7  0x00007f1d9912ddc5 in driswDestroyScreen (base=0x565112e073d0)
    at drisw_glx.c:587
#8  0x00007f1d9910e5cc in FreeScreenConfigs (priv=<optimized out>, 
    priv=<optimized out>) at glxext.c:217
#9  0x00007f1d9910e649 in glx_display_free (priv=priv at entry=0x565112e03c70)
    at glxext.c:240
#10 0x00007f1d9910e79e in __glXCloseDisplay (dpy=0x565112df4030, 
    codes=<optimized out>) at glxext.c:288
#11 0x00007f1d98dcfa42 in XCloseDisplay (dpy=0x565112df4030) at ClDisplay.c:65
#12 0x0000565112544c36 in main (argc=<optimized out>, argv=<optimized out>)
    at glxinfo.c:1278
(gdb) frame 0
#0  0x00007f1d95b89f79 in pthread_barrier_destroy (
    barrier=barrier at entry=0x565112e8e730) at pthread_barrier_destroy.c:40
40                       - BARRIER_IN_THRESHOLD % count;
(gdb) print count
$1 = 0

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