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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [i965 Bisected]Piglit shaders_glsl-vs-raytrace-bug26691 segfault"
href="https://bugs.freedesktop.org/show_bug.cgi?id=85683">85683</a>
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<tr>
<th>Summary</th>
<td>[i965 Bisected]Piglit shaders_glsl-vs-raytrace-bug26691 segfault
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>high
</td>
</tr>
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<th>Component</th>
<td>Drivers/DRI/i965
</td>
</tr>
<tr>
<th>Assignee</th>
<td>mattst88@gmail.com
</td>
</tr>
<tr>
<th>Reporter</th>
<td>huax.lu@intel.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>idr@freedesktop.org
</td>
</tr></table>
<p>
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<pre>System Environment:
--------------------------
Platform: BDW
Libdrm:
(master)libdrm-2.4.58-4-g00847fa48b83a85b0cb882594a12ed1511f780db
Mesa: (master)600066af93fe60abbfff5be82527b529e1e44916
Xserver: (master)xorg-server-1.16.99.901
Xf86_video_intel:(master)2.99.916-119-g61436c2fabe117b85404eecb06158ba0a63a7741
Libva: (master)ccd93de5a707e92a629cccd595757c8d436fa3cc
Libva_intel_driver:(master)24cba20a119c96556ae4dc9a90043896ea70e567
Kernel: (drm-intel-nightly)bd21cf795cf5dc278f1451d0f7a597cb1d13c2ba
Bug detailed description:
---------------------------
It segfault on i965 platforms with mesa master branch. It works well on 10.3
branch.
following ogles2conform cases fail on i965 platforms with same bisect commit.
ES2-CTS.gtf.GL2FixedTests.buffer_objects.buffer_objects
ES2-CTS.gtf.GL2FixedTests.user_clip_planes.user_clip_planes
Bisect shows: d056863b3c535aeebfe5fcfc9468eb33a06ddb60 is the first bad commit.
commit d056863b3c535aeebfe5fcfc9468eb33a06ddb60
Author: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
AuthorDate: Fri Oct 17 20:32:58 2014 -0700
Commit: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
CommitDate: Wed Oct 29 21:35:46 2014 -0700
glsl: Drop constant 0.0 components from dot products.
Helps a small number of vertex shaders in the games Dungeon Defenders
and Shank, as well as an internal benchmark.
instructions in affected programs: 2801 -> 2719 (-2.93%)
Reviewed-by: Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>>
output:
Segmentation fault
(gdb) bt
#0 0x00007ffff297ed40 in emit_dp (elements=<optimized out>, src1=...,
src0=..., dst=..., this=0x7fffffffd1e0) at brw_vec4_visitor.cpp:280
#1 brw::vec4_visitor::visit (this=0x7fffffffd1e0, ir=<optimized out>) at
brw_vec4_visitor.cpp:1568
#2 0x00007ffff297e7fb in brw::vec4_visitor::visit (this=0x7fffffffd1e0,
ir=0x127aa98) at brw_vec4_visitor.cpp:1296
#3 0x00007ffff29816a8 in brw::vec4_visitor::visit (this=0x7fffffffd1e0,
ir=0x127ab18) at brw_vec4_visitor.cpp:2172
#4 0x00007ffff297ab83 in brw::vec4_visitor::visit_instructions
(this=this@entry=0x7fffffffd1e0, list=<optimized out>) at
brw_vec4_visitor.cpp:557
#5 0x00007ffff297ac31 in brw::vec4_visitor::visit (this=0x7fffffffd1e0,
ir=<optimized out>) at brw_vec4_visitor.cpp:1122
#6 0x00007ffff297ab83 in brw::vec4_visitor::visit_instructions
(this=this@entry=0x7fffffffd1e0, list=<optimized out>) at
brw_vec4_visitor.cpp:557
#7 0x00007ffff297169e in brw::vec4_visitor::run
(this=this@entry=0x7fffffffd1e0) at brw_vec4.cpp:1732
#8 0x00007ffff2971c54 in brw_vs_emit (brw=brw@entry=0x7ffff7fa8038,
prog=prog@entry=0xf1d998, c=c@entry=0x7fffffffde30,
prog_data=prog_data@entry=0x7fffffffdee0,
mem_ctx=mem_ctx@entry=0xac3588,
final_assembly_size=final_assembly_size@entry=0x7fffffffde2c) at
brw_vec4.cpp:1881
#9 0x00007ffff298b039 in do_vs_prog (brw=brw@entry=0x7ffff7fa8038,
prog=prog@entry=0xf1d998, vp=vp@entry=0x12c99d0, key=key@entry=0x7fffffffe010)
at brw_vs.c:295
#10 0x00007ffff298b95e in brw_vs_precompile (ctx=0x7ffff7fa8038, prog=0xf1d998)
at brw_vs.c:545
#11 0x00007ffff29696b5 in brw_shader_precompile (prog=0xf1d998,
ctx=0x7ffff7fa8038) at brw_shader.cpp:68
#12 brw_link_shader (ctx=0x7ffff7fa8038, shProg=0xf1d998) at brw_shader.cpp:258
#13 0x00007ffff27fcdc6 in _mesa_glsl_link_shader (ctx=0x7ffff7fa8038,
prog=0xf1d998) at ../../src/mesa/program/ir_to_mesa.cpp:3038
#14 0x00007ffff2709fca in link_program (ctx=0x7ffff7fa8038, program=<optimized
out>) at ../../src/mesa/main/shaderapi.c:917
#15 0x00007ffff7afcbb8 in stub_glLinkProgram (program=2) at
/GFX/Test/Piglit/piglit/tests/util/piglit-dispatch-gen.c:29058
#16 0x00007ffff7b4b19e in piglit_link_simple_program (vs=1, fs=0) at
/GFX/Test/Piglit/piglit/tests/util/piglit-shader.c:243
#17 0x00000000004015bc in piglit_init (argc=1, argv=0x7fffffffe3d8) at
/GFX/Test/Piglit/piglit/tests/shaders/glsl-vs-raytrace-<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Spurious hangcheck whilst executing a long shader over a large vertex buffer"
href="show_bug.cgi?id=26691">bug26691</a>.c:294
#18 0x00007ffff7b638be in run_test (gl_fw=0x636010, argc=1,
argv=0x7fffffffe3d8) at
/GFX/Test/Piglit/piglit/tests/util/piglit-framework-gl/piglit_fbo_framework.c:50
#19 0x00007ffff7b4a875 in piglit_gl_test_run (argc=1, argv=0x7fffffffe3d8,
config=0x7fffffffe2a0) at
/GFX/Test/Piglit/piglit/tests/util/piglit-framework-gl.c:151
#20 0x00000000004011f6 in main (argc=1, argv=0x7fffffffe3d8) at
/GFX/Test/Piglit/piglit/tests/shaders/glsl-vs-raytrace-<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Spurious hangcheck whilst executing a long shader over a large vertex buffer"
href="show_bug.cgi?id=26691">bug26691</a>.c:36
Reproduce steps:
-------------------------
1. xinit
2. bin/glsl-vs-raytrace-<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Spurious hangcheck whilst executing a long shader over a large vertex buffer"
href="show_bug.cgi?id=26691">bug26691</a> -auto -fbo</pre>
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