Created attachment 123069 [details]
layout asm, segfault is in the first line
I've had this for a while during playing around with the compute shader
patches, but I do not know whether they are at fault.
Running on
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Wimbledon XT [Radeon HD 7970M] (rev ff)
with mesa git and very recent llvm 3.9.
On the first start of Alien Isolation the game shows the initial loading screen
and then the 20th century logo video - while playing this video, Alien
Isolation segfaults. With subsequent starts of the game, it segfaults while
displaying the loading screen and before getting to the 20th century logo
video.
Unfortunately I can only provide this backtrace:
Thread 31 "WinMain" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffc816d700 (LWP 18766)]
0x00007fffe98a4387 in ?? () from /usr/lib/xorg/modules/dri/radeonsi_dri.so
(gdb) bt
#0 0x00007fffe98a4387 in ?? () from /usr/lib/xorg/modules/dri/radeonsi_dri.so
#1 0x0000000000000000 in ?? ()
(gdb)
because when I compile mesa with empty CFLAGS, it segfaults, but when mesa is
compiled with CFLAGS="-g", then the segfault does NOT happen and the game works
nicely. So there's only the assembly gdb shows with layout asm in the
attachment...
When I use the same mesa build that crashes on radeonsi with intel graphics, it
also does not crash, so it's something in the radeonsi driver.