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[eaglgenes101 <eaglgenes101@xxxxxxxxx>]

Very much my issue, as I am developing a libgdx project right now. I
have a reduced (though not minimal) test case here:
https://github.com/eaglgenes101/PatternLife

Open it with Eclipse by importing an existing project, then run it with
the block laying switch engine and the Conway Life ruleset (which is
currently the default as of commit ffb078). It blanks out around
generation 2300, and kicks the bucket around generation 2500.
Frustrating for me, since I want to optimize further, but I can't while
the consistent crashing hampers my ability to benchmark large patterns.

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https://bugs.launchpad.net/bugs/1503551

Title:
  Java segfaulted in i965 driver - lots of deleted mmapped files

Status in xserver-xorg-video-intel package in Ubuntu:
  Confirmed

Bug description:
  Java encountered a segfault in the i965 driver while running
  Minecraft. A perusal of the dump report suggests that the issue is not
  due to Minecraft but due to heavy use of the graphics exacerbating a
  memory mapping leak in the driver - it seems that the mappings for
  /dev/drm/card0 and /dri objects are not properly freed.

  Note that I was running Optifine with Multi-Core loading, which causes
  multi-threaded use of the graphics driver.

  Important parts of the hs_err file are pasted below. However, I cut
  out a *lot* of the /drm mm object and /dev/dri/card0 mappings. There's
  a more than a hundred pages at 30 lines a page.

  ---

  #
  # A fatal error has been detected by the Java Runtime Environment:
  #
  #  SIGSEGV (0xb) at pc=0x00007f180efcc4e3, pid=31233, tid=139740657592064
  #
  # JRE version: OpenJDK Runtime Environment (7.0_79-b14) (build 1.7.0_79-b14)
  # Java VM: OpenJDK 64-Bit Server VM (24.79-b02 mixed mode linux-amd64 compressed oops)
  # Derivative: IcedTea 2.5.6
  # Distribution: Ubuntu 15.04, package 7u79-2.5.6-0ubuntu1.15.04.1
  # Problematic frame:
  # C  [i965_dri.so+0x1914e3]
  #
  # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
  #
  # The crash happened outside the Java Virtual Machine in native code.
  # See problematic frame for where to report the bug.
  #

  Stack: [0x00007f17e831a000,0x00007f17e841b000],  sp=0x00007f17e84197e0,  free space=1021k
  Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
  C  [i965_dri.so+0x1914e3]

  Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
  J 1853  org.lwjgl.opengl.GL11.nglDrawArrays(IIIJ)V (0 bytes) @ 0x00007f18614fc92a [0x00007f18614fc8e0+0x4a]
  J 2863 C2 net.minecraft.client.renderer.Tessellator.func_78381_a()I (346 bytes) @ 0x00007f186177e020 [0x00007f186177d7e0+0x840]
  J 5013 C2 WorldRendererThreaded.postRenderBlocksThreaded(ILnet/minecraft/entity/EntityLivingBase;)V (114 bytes) @ 0x00007f1861ced92c [0x00007f1861ced8c0+0x6c]
  J 2709 C2 WorldRendererThreaded.updateRenderer(LIWrUpdateListener;)V (823 bytes) @ 0x00007f18617a3504 [0x00007f18617a2b20+0x9e4]
  J 4593% C2 WrUpdateThread.run()V (140 bytes) @ 0x00007f1861abb340 [0x00007f1861abb020+0x320]
  v  ~StubRoutines::call_stub

  Dynamic libraries:
  00400000-00401000 r-xp 00000000 fc:00 13763814                           /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java
  00600000-00601000 r--p 00000000 fc:00 13763814                           /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java
  00601000-00602000 rw-p 00001000 fc:00 13763814                           /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java
  0066f000-00690000 rw-p 00000000 00:00 0                                  [heap]
  b5a00000-bda00000 rw-p 00000000 00:00 0
  bda00000-c0000000 rw-p 00000000 00:00 0
  c0000000-eaa80000 rw-p 00000000 00:00 0
  eaa80000-100000000 rw-p 00000000 00:00 0
  7f1743442000-7f174344a000 rw-s 00000000 00:05 3198953                    /drm mm object (deleted)
  7f174344a000-7f1743452000 rw-s 00000000 00:05 3198952                    /drm mm object (deleted)
  7f1743452000-7f174345a000 rw-s 00000000 00:05 3198951                    /drm mm object (deleted)
  7f174345a000-7f1743462000 rw-s 00000000 00:05 3198950                    /drm mm object (deleted)
  7f1743462000-7f174346a000 rw-s 142cc8000 00:06 11074                     /dev/dri/card0
  7f174346a000-7f1743472000 rw-s 00000000 00:05 3198949                    /drm mm object (deleted)
  7f1743472000-7f174347a000 rw-s 142cc0000 00:06 11074                     /dev/dri/card0
  7f174347a000-7f1743482000 rw-s 00000000 00:05 3198948                    /drm mm object (deleted)
  7f1743482000-7f174348a000 rw-s 142cb8000 00:06 11074                     /dev/dri/card0
  7f174348a000-7f1743492000 rw-s 142cb0000 00:06 11074                     /dev/dri/card0

  .... snip ....

  7f1745c72000-7f1745c7a000 rw-s 141680000 00:06 11074                     /dev/dri/card0
  7f1745c7a000-7f1745c82000 rw-s 141678000 00:06 11074                     /dev/dri/card0
  7f1745c82000-7f1745c8a000 rw-s 141670000 00:06 11074                     /dev/dri/card0
  7f1745c8a000-7f1745c92000 rw-s 141668000 00:06 11074                     /dev/dri/card0
  7f1745c92000-7f1745c9a000 rw-s 00000000 00:05 3200480                    /drm mm object (deleted)
  7f1745c9a000-7f1745ca2000 rw-s 141660000 00:06 11074                     /dev/dri/card0
  7f1745ca2000-7f1745caa000 rw-s 141658000 00:06 11074                     /dev/dri/card0
  7f1745caa000-7f1745cb2000 rw-s 141650000 00:06 11074                     /dev/dri/card0
  7f1745cb2000-7f1745cba000 rw-s 00000000 00:05 3200479                    /drm mm object (deleted)
  7f1745cba000-7f1745cc2000 rw-s 141648000 00:06 11074                     /dev/dri/card0
  ....
  7f1752d0a000-7f1752d12000 rw-s 13a1b0000 00:06 11074                     /dev/dri/card0
  ....
  7f17538e2000-7f17538ea000 rw-s 00000000 00:05 3193548                    /drm mm object (deleted)
  ....
  7f1759aca000-7f1759ad2000 rw-s 135cf8000 00:06 11074                     /dev/dri/card0
  ....
  7f176105e000-7f1761066000 rw-s 00000000 00:05 3175532                    /drm mm object (deleted)
  ....
  7f17bbfc0000-7f17bbfc8000 rw-s 00000000 00:05 3120845                    /drm mm object (deleted)
  7f17bbfc8000-7f17bbfd0000 rw-s 00000000 00:05 3120844                    /drm mm object (deleted)
  7f17bbfd0000-7f17bbfd8000 rw-s 100ed7000 00:06 11074                     /dev/dri/card0
  7f17bbfd8000-7f17bbfe0000 rw-s 100ecf000 00:06 11074                     /dev/dri/card0
  7f17bbfe0000-7f17bbfe8000 rw-s 100ec7000 00:06 11074                     /dev/dri/card0
  7f17bbfe8000-7f17bbff0000 rw-s 100ebf000 00:06 11074                     /dev/dri/card0
  7f17bbff0000-7f17bbff8000 rw-s 100eb7000 00:06 11074                     /dev/dri/card0
  7f17bbff8000-7f17bc000000 rw-s 100eaf000 00:06 11074                     /dev/dri/card0
  7f17bc000000-7f17bc021000 rw-p 00000000 00:00 0
  7f17bc021000-7f17c0000000 ---p 00000000 00:00 0
  7f17c0000000-7f17c1d9a000 rw-p 00000000 00:00 0
  7f17c1d9a000-7f17c4000000 ---p 00000000 00:00 0
  7f17c4000000-7f17c4180000 rw-p 00000000 00:00 0
  7f17c4180000-7f17c8000000 ---p 00000000 00:00 0
  7f17c8000000-7f17c8048000 rw-p 00000000 00:00 0
  ....
  7f17e4021000-7f17e8000000 ---p 00000000 00:00 0
  7f17e8000000-7f17e8001000 rw-s 00000000 00:05 3169128                    /drm mm object (deleted)
  7f17e8001000-7f17e8009000 rw-s 100ea7000 00:06 11074                     /dev/dri/card0
  ....
  7f17e81a9000-7f17e8219000 rw-s 00000000 00:05 3121586                    /drm mm object (deleted)
  7f17e8219000-7f17e821c000 ---p 00000000 00:00 0
  7f17e821c000-7f17e831a000 rw-p 00000000 00:00 0
  7f17e831a000-7f17e831d000 ---p 00000000 00:00 0
  7f17e831d000-7f17e841b000 rw-p 00000000 00:00 0                          [stack:22484]
  7f17e841b000-7f17e8496000 r-xp 00000000 fc:00 12718478                   /usr/lib/x86_64-linux-gnu/nss/libfreebl3.so
  7f17e8496000-7f17e8695000 ---p 0007b000 fc:00 12718478                   /usr/lib/x86_64-linux-gnu/nss/libfreebl3.so

  (normal library mappings follow, interspersed with more /dev/dri/card0
  and /drm mm object (deleted) mappings)

  From the crash log, I think it's evident that the driver is leaking
  memory mappings.

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