[Mesa-dev] OSMesa VTK Test Segfault

[Kevin H. Hobbs]

I build VTK from git with Mesa from git every night.

mesa is built with :

./autogen.sh \
  --prefix=/home/kevin/mesa_osmesa/ \
  --with-driver=osmesa \
  --disable-gallium

VTK is linked to OSMesa only and no other GL.

VTK's Charts-TestMultipleScalarsToColors test is segfaulting.

The backtrace from gdb is :

#0  glGetString () at glapi_x86-64.S:9876
#1  0x00007ffff6031cd7 in vtkOpenGLExtensionManager::ExtensionSupported
(this=0x654b50, name=0x41d7f6 "GL_VERSION_1_2")
    at /home/kevin/kitware/VTK/Rendering/vtkOpenGLExtensionManager.cxx:204
#2  0x00000000004162d5 in TestMultipleScalarsToColors ()
    at
/home/kevin/kitware/VTK/Charts/Testing/Cxx/TestMultipleScalarsToColors.cxx:47
#3  0x000000000040e5db in main (ac=9, av=0x7fffffffdb00)
    at
/home/kevin/kitware/VTK_OSMesa_Build/Charts/Testing/Cxx/ChartsCxxTests.cxx:288

The output from valgrind is :

$ valgrind /home/kevin/kitware/VTK_OSMesa_Build/bin/ChartsCxxTests
"TestMultipleScalarsToColors" "-D" "/home/kevin/kitware/VTKData" "-T"
"/home/kevin/kitware/VTK_OSMesa_Build/Testing/Temporary" "-V"
"Baseline/Charts/TestMultipleScalarsToColors.png" "-E" "25"
==28040== Memcheck, a memory error detector
==28040== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
==28040== Using Valgrind-3.5.0 and LibVEX; rerun with -h for copyright info
==28040== Command:
/home/kevin/kitware/VTK_OSMesa_Build/bin/ChartsCxxTests
TestMultipleScalarsToColors -D /home/kevin/kitware/VTKData -T
/home/kevin/kitware/VTK_OSMesa_Build/Testing/Temporary -V
Baseline/Charts/TestMultipleScalarsToColors.png -E 25
==28040==
==28040== Invalid read of size 8
==28040==    at 0xB571A07: glGetString (glapi_x86-64.S:9876)
==28040==    by 0x4162D4: TestMultipleScalarsToColors(int, char**)
(TestMultipleScalarsToColors.cxx:47)
==28040==    by 0x40E5DA: main (ChartsCxxTests.cxx:288)
==28040==  Address 0x898 is not stack'd, malloc'd or (recently) free'd
==28040==
==28040==
==28040== Process terminating with default action of signal 11 (SIGSEGV)
==28040==  Access not within mapped region at address 0x898
==28040==    at 0xB571A07: glGetString (glapi_x86-64.S:9876)
==28040==    by 0x4162D4: TestMultipleScalarsToColors(int, char**)
(TestMultipleScalarsToColors.cxx:47)
==28040==    by 0x40E5DA: main (ChartsCxxTests.cxx:288)
==28040==  If you believe this happened as a result of a stack
==28040==  overflow in your program's main thread (unlikely but
==28040==  possible), you can try to increase the size of the
==28040==  main thread stack using the --main-stacksize= flag.
==28040==  The main thread stack size used in this run was 10485760.
==28040== Invalid free() / delete / delete[]
==28040==    at 0x4A04D72: free (vg_replace_malloc.c:325)
==28040==    by 0x318532735A: ??? (in /lib64/libc-2.11.2.so)
==28040==    by 0x3185326EF1: ??? (in /lib64/libc-2.11.2.so)
==28040==    by 0x480162B: _vgnU_freeres (vg_preloaded.c:62)
==28040==    by 0x6AC9CD6:
vtkOpenGLExtensionManager::ExtensionSupported(char const*)
(vtkOpenGLExtensionManager.cxx:204)
==28040==    by 0x4162D4: TestMultipleScalarsToColors(int, char**)
(TestMultipleScalarsToColors.cxx:47)
==28040==    by 0x40E5DA: main (ChartsCxxTests.cxx:288)
==28040==  Address 0xb38ca10 is not stack'd, malloc'd or (recently) free'd
==28040==
==28040==
==28040== HEAP SUMMARY:
==28040==     in use at exit: 168,234 bytes in 1,731 blocks
==28040==   total heap usage: 1,806 allocs, 77 frees, 189,825 bytes
allocated
==28040==
==28040== LEAK SUMMARY:
==28040==    definitely lost: 0 bytes in 0 blocks
==28040==    indirectly lost: 0 bytes in 0 blocks
==28040==      possibly lost: 10,645 bytes in 112 blocks
==28040==    still reachable: 157,589 bytes in 1,619 blocks
==28040==         suppressed: 0 bytes in 0 blocks
==28040== Rerun with --leak-check=full to see details of leaked memory
==28040==
==28040== For counts of detected and suppressed errors, rerun with: -v
==28040== ERROR SUMMARY: 3 errors from 2 contexts (suppressed: 6 from 6)
Segmentation fault

Could this be a problem in Mesa?

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