http://bugs.freedesktop.org/show_bug.cgi?id=18659
Summary: Crash in shader/slang/slang_codegen.c
_slang_gen_function_call_name()
Product: Mesa
Version: CVS
Platform: x86-64 (AMD64)
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Mesa core
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
Created an attachment (id=20500)
--> (http://bugs.freedesktop.org/attachment.cgi?id=20500)
a glsl fragment shader used in VTK
Mesa git crashes with the following VTK test:
TestTranslucentLUTDepthPeelingPass
http://www.cdash.org/CDash/testDetails.php?test=12796458&build=216805
It passes with an nVidia Quadro FX 3600M with the driver from nVidia.
In attachment is the glsl code.
To reproduce the crash, I just copied the file into mesa/progs/glsl/ and
change line 19 of brick.c to be:
static char *FragProgFile = "vtkDepthPeeling_fs.glsl";
The crash happens when Mesa try to compile the shader.
"brick" crashes like this:
(gdb) r
Starting program: /home/fbertel/install/mesa/mesa-git/mesa/progs/glsl/brick
[Thread debugging using libthread_db enabled]
Mesa: Initializing x86-64 optimizations
Mesa: Mesa 7.3-devel DEBUG build Nov 18 2008 15:30:43
[New Thread 0x2b40a3c98680 (LWP 9342)]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x2b40a3c98680 (LWP 9342)]
0x00002b40a1296b63 in _slang_gen_function_call_name (A=0x7fff0a148300,
name=0x220e038 "propFuncFS", oper=0x2213420, dest=0x0)
at shader/slang/slang_codegen.c:685
In this case "fun" is OK:
(gdb) p fun
$1 = (slang_function *) 0x22134f0
but "fun->body" is NULL:
(gdb) p fun->body
$2 = (slang_operation *) 0x0
So, of course, this is crashing:
"fun->body->type"
The complete stack is:
(gdb) bt
#0 0x00002b40a1296b63 in _slang_gen_function_call_name (A=0x7fff0a148300,
name=0x220e038 "propFuncFS", oper=0x2213420, dest=0x0)
at shader/slang/slang_codegen.c:685
#1 0x00002b40a1295821 in _slang_gen_operation (A=0x7fff0a148300,
oper=0x2213420) at shader/slang/slang_codegen.c:3528
#2 0x00002b40a129594f in _slang_gen_operation (A=0x7fff0a148300,
oper=0x220e110) at shader/slang/slang_codegen.c:3378
#3 0x00002b40a1298137 in _slang_codegen_function (A=0x7fff0a148300,
fun=0x2213588) at shader/slang/slang_codegen.c:3963
#4 0x00002b40a11f58c6 in parse_code_unit (C=0x7fff0a1483a0, unit=0x2237f78,
shader=0x6ebea0) at shader/slang/slang_compile.c:2235
#5 0x00002b40a11f5b3e in compile_binary (prod=<value optimized out>,
unit=0x7fff0a147fd8, version=<value optimized out>,
type=SLANG_UNIT_FRAGMENT_SHADER, infolog=0xfefefefefefefeff,
builtin=0xff5e5245626d7445, downlink=0x8101010101010100, shader=0x6ebea0)
at shader/slang/slang_compile.c:2276
#6 0x00002b40a11f603d in _slang_compile (ctx=0x6153f0, shader=0x6ebea0)
at shader/slang/slang_compile.c:2343
#7 0x00002b40a11a5f3b in _mesa_compile_shader (ctx=0x6153f0,
shaderObj=<value optimized out>) at shader/shader_api.c:1360
#8 0x000000000040208f in CompileShaderText (shaderType=35632,
text=0x8f9b50 "// ", '=' <repeats 76 times>, "\n//\n// Program:
Visualization Toolkit\n// Module: $RCSfile: vtkDepthPeeling_fs.glsl,v
$\n//\n// Copyright (c) Ken Ma"...) at shaderutil.c:54
#9 0x000000000040263f in CompileShaderFile (shaderType=35632,
filename=<value optimized out>) at shaderutil.c:91
#10 0x0000000000401a33 in main (argc=1, argv=0x7fff0a14b3a8) at brick.c:150
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