Re: [BUG]: libffi 3.3 breaks OpenJDK Zero on 32-bit PowerPC

[Anthony Green <green@moxielogic.com>]

On Fri, Feb 14, 2020 at 6:14 AM John Paul Adrian Glaubitz <
glaubitz@physik.fu-berlin.de> wrote:

> After libffi was upgraded to 3.3 in Debian, all OpenJDK versions started
> to break on 32-bit PowerPC with the freshly compiled JVM crashing with
> the following backtrace:
>

Thanks for pointing this out.   I only figured out how to do CI testing for
32-bit PowerPC after the 3.3 release, and there are indeed a number of
failures:

https://github.com/libffi/rlgl-policy/blob/master/XFAIL#L202-L290

travis-ci testing is done with a powerpc-eabisim GNU toolchain.  We need to
start going through these failures assuming that powerpc-eabisim is a close
approximation of the system you are using.

AG




>
> Thread 2 "java" received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 0xf767f450 (LWP 4139976)]
> MemoryAccess<int>::get_volatile (this=<optimized out>) at
> /home/glaubitz/tmp/openjdk/jdk/src/hotspot/share/prims/unsafe.cpp:244
> 244           T ret = HeapAccess<MO_SEQ_CST>::load_at(_obj, _offset);
> (gdb) bt
> #0  MemoryAccess<int>::get_volatile (this=<optimized out>) at
> /home/glaubitz/tmp/openjdk/jdk/src/hotspot/share/prims/unsafe.cpp:244
> #1  Unsafe_GetIntVolatile (env=<optimized out>, unsafe=<optimized out>,
> obj=0xf767e5b4, offset=<optimized out>) at
> /home/glaubitz/tmp/openjdk/jdk/src/hotspot/share/prims/unsafe.cpp:334
> #2  0xf77768e4 in ?? () from /usr/lib/powerpc-linux-gnu/libffi.so.7
> #3  0xf7775874 in ?? () from /usr/lib/powerpc-linux-gnu/libffi.so.7
> #4  0xf7932690 in CppInterpreter::native_entry (method=<optimized out>,
> UNUSED=<optimized out>, __the_thread__=0xf7314250)
>     at
> /home/glaubitz/tmp/openjdk/jdk/src/hotspot/cpu/zero/interpreterRT_zero.hpp:41
> #5  0xf79301cc in ZeroEntry::invoke (__the_thread__=0xf7314250,
> method=<optimized out>, this=<optimized out>) at
> /home/glaubitz/tmp/openjdk/jdk/src/hotspot/cpu/zero/entry_zero.hpp:59
> #6  CppInterpreter::invoke_method (method=<optimized out>,
> entry_point=<optimized out>, __the_thread__=__the_thread__@entry
> =0xf7314250)
>     at
> /home/glaubitz/tmp/openjdk/jdk/src/hotspot/share/interpreter/cppInterpreter.cpp:66
> #7  0xf7931174 in CppInterpreter::main_loop (recurse=recurse@entry=0,
> __the_thread__=__the_thread__@entry=0xf7314250)
>     at
> /home/glaubitz/tmp/openjdk/jdk/src/hotspot/cpu/zero/bytecodeInterpreter_zero.hpp:87
> #8  0xf793187c in CppInterpreter::normal_entry (method=0xf4d96838,
> UNUSED=<optimized out>, __the_thread__=0xf7314250)
>     at
> /home/glaubitz/tmp/openjdk/jdk/src/hotspot/cpu/zero/cppInterpreter_zero.cpp:77
> #9  0xf79301cc in ZeroEntry::invoke (__the_thread__=0xf7314250,
> method=<optimized out>, this=<optimized out>) at
> /home/glaubitz/tmp/openjdk/jdk/src/hotspot/cpu/zero/entry_zero.hpp:59
> #10 CppInterpreter::invoke_method (method=<optimized out>,
> entry_point=<optimized out>, __the_thread__=__the_thread__@entry
> =0xf7314250)
>     at
> /home/glaubitz/tmp/openjdk/jdk/src/hotspot/share/interpreter/cppInterpreter.cpp:66
>
> Adrian
>
> --
>  .''`.  John Paul Adrian Glaubitz
> : :' :  Debian Developer - glaubitz@debian.org
> `. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
>   `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913
>