https://bugs.freedesktop.org/show_bug.cgi?id=98028
Bug ID: 98028
Summary: Guns of Icarus Online segfaults on startup since
AMDGPU: Partially fix control flow at -O0
Product: Mesa
Version: git
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/Gallium/radeonsi
Assignee: dri-devel at lists.freedesktop.org
Reporter: daniel at constexpr.org
QA Contact: dri-devel at lists.freedesktop.org
Created attachment 126970
--> https://bugs.freedesktop.org/attachment.cgi?id=126970&action=edit
Short Guns of Icarus Online startup trace (truncated by segfault)
Guns of Icarus Online segfaults (or sometimes hangs) on startup with current
Mesa and LLVM. I have bisected the segfault to LLVM r282667.
The backtraces for the segfaults vary. Some of the segfaults are inside malloc
/ free, indicating possible memory corruption.
I have attached an apitrace recorded using a bad LLVM revision. While the game
consistently segfaults (or hangs), replaying the trace does not result in a
segfault every time.
Here is also a longer trace of the full startup sequence recorded using a good
LLVM revision:
http://constexpr.org/tmp/GoIO-radeonsi.2.trace.xz (82 MiB)
GPU: R9 380X
Kernel: 4.7.5-gentoo
Mesa: git-024c207
LLVM: r283076
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