Re: [Qemu-devel] [Bug 1735384] Re: OpenJDK JVM segfaults on qemu-sh4 (regression)

[John Paul Adrian Glaubitz]

The offending commit is:

d25f2a72272b9ffe0d06710d6217d1169bc2cc7d is the first bad commit
commit d25f2a72272b9ffe0d06710d6217d1169bc2cc7d
Author: Alex Bennée <address@hidden>
Date:   Mon Nov 13 13:55:27 2017 +0000

    accel/tcg/translate-all: expand cpu_restore_state addr check

    We are still seeing signals during translation time when we walk over
    a page protection boundary. This expands the check to ensure the host
    PC is inside the code generation buffer. The original suggestion was
    to check versus tcg_ctx.code_gen_ptr but as we now segment the
    translation buffer we have to settle for just a general check for
    being inside.

    I've also fixed up the declaration to make it clear it can deal with
    invalid addresses. A later patch will fix up the call sites.

    Signed-off-by: Alex Bennée <address@hidden>
    Reported-by: Peter Maydell <address@hidden>
    Reviewed-by: Laurent Vivier <address@hidden>
    Reviewed-by: Richard Henderson <address@hidden>
    Message-id: address@hidden
    Suggested-by: Paolo Bonzini <address@hidden>
    Cc: Richard Henderson <address@hidden>
    Tested-by: Peter Maydell <address@hidden>
    Signed-off-by: Peter Maydell <address@hidden>

:040000 040000 da50c4c43089d3ee7d1e9ad50d3c9036114e5f11 
cd6a0dcaa1d284fe5439f6f3b61547d4b0662768 M      accel
:040000 040000 c294a7c102d27295f8d81cc06b5d4d17357440ad 
5a1268b7634f69f0806f22161ec7d6a1a26c8812 M      include

Reverting the commit resolves the issue.

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - address@hidden
`. `'   Freie Universitaet Berlin - address@hidden
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913

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https://bugs.launchpad.net/bugs/1735384

Title:
  OpenJDK JVM segfaults on qemu-sh4 (regression)

Status in QEMU:
  New

Bug description:
  Some of the recent changes introduced a regression which makes the
  OpenJDK JVM crash on qemu-sh4:

  (sid-sh4-sbuild)address@hidden:/# java -version
  qemu: uncaught target signal 11 (Segmentation fault) - core dumped
  Segmentation fault
  (sid-sh4-sbuild)address@hidden:/#

  An older version works fine:

  (sid-sh4-sbuild)address@hidden:/# java -version
  openjdk version "9.0.1"
  OpenJDK Runtime Environment (build 9.0.1+11-Debian-1)
  OpenJDK Zero VM (build 9.0.1+11-Debian-1, interpreted mode)
  (sid-sh4-sbuild)address@hidden:/#

  Haven't had time for bisecting this yet.

  Adrian

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