[Bug 103234] KWin crashed when Alt+Tab-ing through open windows

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103234

--- Comment #13 from Roman Gilg <subdiff at gmail.com> ---
GDB output near to current master (at 8d1f1ce412, later does not compile on my
system at the moment):



Thread 17 "gallium_drv:0" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f67d592f700 (LWP 7986)]
si_emit_draw_packets (sctx=sctx at entry=0x2c94390, info=info at entry=0x2ce22e8,
indexbuf=<optimized out>, index_size=index_size at entry=2,
index_offset=<optimized out>) at
/home/roman/dev/mesa/src/mesa/src/gallium/drivers/radeonsi/si_state_draw.c:718
718                     index_max_size = (indexbuf->width0 - index_offset) /



(gdb) bt
#0  si_emit_draw_packets (sctx=sctx at entry=0x2c94390, info=info at entry=0x2ce22e8,
indexbuf=<optimized out>, index_size=index_size at entry=2,
index_offset=<optimized out>) at
/home/roman/dev/mesa/src/mesa/src/gallium/drivers/radeonsi/si_state_draw.c:718
#1  0x00007f67d4a2467d in si_draw_vbo (ctx=0x2c94390, info=0x2ce22e8) at
/home/roman/dev/mesa/src/mesa/src/gallium/drivers/radeonsi/si_state_draw.c:1481
#2  0x00007f67d492f871 in tc_call_draw_vbo (pipe=<optimized out>,
payload=0x2ce22e8) at
/home/roman/dev/mesa/src/mesa/src/gallium/auxiliary/util/u_threaded_context.c:2012
#3  0x00007f67d492bff7 in tc_batch_execute (job=job at entry=0x2ce18f0,
thread_index=thread_index at entry=0) at
/home/roman/dev/mesa/src/mesa/src/gallium/auxiliary/util/u_threaded_context.c:96
#4  0x00007f67d47b529f in util_queue_thread_func (input=input at entry=0x2ad6d30)
at /home/roman/dev/mesa/src/mesa/src/util/u_queue.c:271
#5  0x00007f67d47b4e27 in impl_thrd_routine (p=<optimized out>) at
/home/roman/dev/mesa/src/mesa/include/c11/threads_posix.h:87
#6  0x00007f68839146ba in start_thread (arg=0x7f67d592f700) at
pthread_create.c:333
#7  0x00007f688ad0c41d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109



(gdb) bt full
#0  si_emit_draw_packets (sctx=sctx at entry=0x2c94390, info=info at entry=0x2ce22e8,
indexbuf=<optimized out>, index_size=index_size at entry=2,
index_offset=<optimized out>) at
/home/roman/dev/mesa/src/mesa/src/gallium/drivers/radeonsi/si_state_draw.c:718
        indirect = 0x0
        cs = 0x2ca3a90
        sh_base_reg = 45360
        render_cond_bit = false
        index_max_size = 0
        index_va = 0
        __PRETTY_FUNCTION__ = "si_emit_draw_packets"
#1  0x00007f67d4a2467d in si_draw_vbo (ctx=0x2c94390, info=0x2ce22e8) at
/home/roman/dev/mesa/src/mesa/src/gallium/drivers/radeonsi/si_state_draw.c:1481
        sctx = 0x2c94390
        rs = <optimized out>
        indexbuf = 0x0
        dirty_tex_counter = <optimized out>
        rast_prim = <optimized out>
        index_size = 2
        index_offset = 0
        __PRETTY_FUNCTION__ = "si_draw_vbo"
#2  0x00007f67d492f871 in tc_call_draw_vbo (pipe=<optimized out>,
payload=0x2ce22e8) at
/home/roman/dev/mesa/src/mesa/src/gallium/auxiliary/util/u_threaded_context.c:2012
        info = 0x2ce22e8
#3  0x00007f67d492bff7 in tc_batch_execute (job=job at entry=0x2ce18f0,
thread_index=thread_index at entry=0) at
/home/roman/dev/mesa/src/mesa/src/gallium/auxiliary/util/u_threaded_context.c:96
        iter = 0x2ce22e0
        batch = 0x2ce18f0
        pipe = 0x2c94390
        last = 0x2ce24e0
#4  0x00007f67d47b529f in util_queue_thread_func (input=input at entry=0x2ad6d30)
at /home/roman/dev/mesa/src/mesa/src/util/u_queue.c:271
        job = {job = 0x2ce18f0, fence = 0x2ce1908, execute = 0x7f67d492bfb0
<tc_batch_execute>, cleanup = 0x0}
        queue = 0x2cde788
        thread_index = <optimized out>
        __PRETTY_FUNCTION__ = "util_queue_thread_func"
#5  0x00007f67d47b4e27 in impl_thrd_routine (p=<optimized out>) at
/home/roman/dev/mesa/src/mesa/include/c11/threads_posix.h:87
        pack = {func = 0x7f67d47b5060 <util_queue_thread_func>, arg =
0x2ad6d30}
#6  0x00007f68839146ba in start_thread (arg=0x7f67d592f700) at
pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f67d592f700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140083941537536,
7002528104003647912, 0, 140728410686399, 8388608, 39522672,
-6925884145858791000, -6918376651715135064}, mask_was_saved = 0}}, priv = {pad
= {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, 
              canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007f688ad0c41d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

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