Bug 43816

Summary: [bisected i965]oglc conditional_render(advanced.fbo.queryOnFBO) segfaults
Product: Mesa Reporter: fangxun <xunx.fang>
Component: Drivers/DRI/i965Assignee: Ian Romanick <idr>
Status: CLOSED DUPLICATE QA Contact:
Severity: major    
Priority: high CC: kenneth
Version: git   
Hardware: All   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:

Description fangxun 2011-12-14 01:49:23 UTC 
System Environment:
--------------------------
Arch:           i386
Platform:       huronriver
Libdrm:         (master)2.4.28-4-gdd9a5b4f7fb07c78db4e7481bedca1b981030e3f
Mesa:           (master)23895cc006f3dbf96a502ddd15e291e071aff25a
Xserver:         (master)xorg-server-1.11.99.1-101-g372a6f10dc2d74d2d179e8b92449e9b8636a99ef
Xf86_video_intel: (master)2.17.0-104-gd02dc0fd84194b6acc607d17e4396dd1fdc681f8
Kernel:  (drm-intel-next)9a10f401a401ca69c6537641c8fc0d6b57b5aee8

Bug detailed description:
-------------------------
Below oglc cases also sefault due to bad commit 7a63a311e56.
conditional_render(advanced.fbo.queryOnFBO)
conditional_render(advanced.nofbo.nowait)
conditional_render(advanced.nofbo.readpixels)
conditional_render(basic.nowait)
conditional_render(basic.typical)
conditional_render(basic.wait.nv)
scissor(basic.allCases)

Bisect shows 7a63a311e56fd492823b4b44e526df5a8dc0a021 is the first bad commit.
commit 7a63a311e56fd492823b4b44e526df5a8dc0a021
Author:     Kenneth Graunke <kenneth@whitecape.org>
AuthorDate: Mon Nov 14 19:13:27 2011 -0800
Commit:     Paul Berry <stereotype441@gmail.com>
CommitDate: Wed Dec 7 16:38:00 2011 -0800

    i965: Set the maximum number of GS URB entries on Sandybridge.

    We never filled this in before because we didn't care.

    I'm skeptical these are correct; my sources indicate that both the VS
    and GS # of entries are 256 on both GT1 and GT2.

    I'm also loathe to change it and break stuff.

    Reviewed-by: Paul Berry <stereotype441@gmail.com>

(gdb) bt
#0  0x08d2513c in FbConfig::FbConfig(Display_ const&, int, FbConfig::fbconfig_type_t) ()
#1  0x08d3e610 in ScheduleManager::one_format(Display_ const&, int) ()
#2  0x08cd2500 in tkShellExecute(std::vector<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > const&, std::vector<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > const&) ()
#3  0x08cdb852 in main ()

Reproduce steps:
----------------
1. start X
2. ./oglconform -z -s -suite all -v 2 -D 128 -test conditional_render advanced.fbo.queryOnFBO
Comment 1 Kenneth Graunke 2011-12-14 11:56:29 UTC 
Bad bisect.  That patch cannot possibly cause this issue as it just sets a field that is never used.  Also, I built the prior commit and still got a segfault.
Comment 2 fangxun 2011-12-15 01:04:18 UTC 
Confirm that it is bad bisect. The first bad commit could be any of:
122c6768e3d4c1d1b57203eca70569f9301baab5 skip(build fail)
e6e734f14317cdb9b77b8192569317c3fecf581f skip(build fail)
bb887b72f71e1323ce35c676f5207a6b2424fed4 skip(build fail)
14721dfe99a30014e2e24088a1bbf9b043e10b13 skip(build fail)
6e8c1a92b31d68048da38eee1e97bb1c22955207 skip(build fail)
ff8e6420fbbbd80c8fd7327f2f2b68e016b7f5c0 skip(build fail)
379e0a3ada995b4cf57d142e0dd4618022e0aadc skip(build fail)
b85284f45e8b05ba9a0dac8dd95a9c078e4a635e skip(build fail)
d0dc75c000d5af92648c7de901756400672b8447 bad(build success)

*** This bug has been marked as a duplicate of bug 43783 ***

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