JavaCall crashes Julia 1.6.3 on macOS

[KenziTrader]

In Julia 1.6.3, JavaCall.init() causes a Segmentation fault. The same happens with version 1.7.0-rc1. It works in version 1.6.2.

               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 1.6.3 (2021-09-23)
 _/ |\__'_|_|_|\__'_|  |  Official https://julialang.org/ release
|__/                   |

julia> versioninfo()
Julia Version 1.6.3
Commit ae8452a9e0 (2021-09-23 17:34 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin19.5.0)
  CPU: Intel(R) Core(TM) i7-4770HQ CPU @ 2.20GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-11.0.1 (ORCJIT, haswell)
Environment:
  JULIA_COPY_STACKS = 1

julia> using JavaCall

julia> JavaCall.init()

signal (11): Segmentation fault: 11
in expression starting at REPL[3]:1
unknown function (ip: 0x14151552d)
Allocations: 5345101 (Pool: 5343172; Big: 1929); GC: 7

               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 1.7.0-rc1 (2021-09-12)
 _/ |\__'_|_|_|\__'_|  |  Official https://julialang.org/ release
|__/                   |

julia> versioninfo()
Julia Version 1.7.0-rc1
Commit 9eade6195e (2021-09-12 06:45 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin19.6.0)
  CPU: Intel(R) Core(TM) i7-4770HQ CPU @ 2.20GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-12.0.1 (ORCJIT, haswell)
Environment:
  JULIA_COPY_STACKS = 1

julia> using JavaCall

julia> JavaCall.init()

signal (11): Segmentation fault: 11
in expression starting at REPL[3]:1
unknown function (ip: 0x14655352d)
Allocations: 4830421 (Pool: 4828125; Big: 2296); GC: 6

[mkitti]

Thanks for the issue. Have you tried this on any other operating systems?

[mkitti]

I just tried 1.6.3 on Linux and Windows:

Linux:

julia> using JavaCall

julia> JavaCall.init()

julia> jls = @jimport java.lang.System
JavaObject{Symbol("java.lang.System")}

julia> out = jfield(jls,"out",@jimport java.io.PrintStream)
JavaObject{Symbol("java.io.PrintStream")}(JavaCall.JavaLocalRef(Ptr{Nothing} @0x00000000023f1598))

julia> jcall(out,"println",Nothing,(JString,),"Hello Java")
Hello Java

julia> versioninfo()
Julia Version 1.6.3
Commit ae8452a9e0 (2021-09-23 17:34 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: AMD FX(tm)-8350 Eight-Core Processor
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-11.0.1 (ORCJIT, bdver1)
Environment:
  JULIA_COPY_STACKS = 1

Windows:

julia> using JavaCall
[ Info: Precompiling JavaCall [494afd89-becb-516b-aafa-70d2670c0337]

julia> JavaCall.init()

julia>

julia> jls = @jimport java.lang.System
JavaObject{Symbol("java.lang.System")}

julia> out = jfield(jls, "out", @jimport java.io.PrintStream )
JavaObject{Symbol("java.io.PrintStream")}(JavaLocalRef(Ptr{Nothing} @0x0000000059c15380))

julia> jcall(out, "println", Nothing, (JString,), "Hello world")
Hello world

julia> versioninfo()
Julia Version 1.6.3
Commit ae8452a9e0 (2021-09-23 17:34 UTC)
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-11.0.1 (ORCJIT, skylake)

[KenziTrader]

In Julia 1.6.2 I also get the Segmentation fault but it doesn't crash. In v1.6.3 or v1.7.0-rc1 is crashes the Julia session. I also tried it without JULIA_COPY_STACKS = 1.

               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 1.6.2 (2021-07-14)
 _/ |\__'_|_|_|\__'_|  |  Official https://julialang.org/ release
|__/                   |

julia> using JavaCall; JavaCall.init()

signal (11): Segmentation fault: 11
in expression starting at REPL[1]:1
unknown function (ip: 0x14f18752d)
Allocations: 3030525 (Pool: 3029395; Big: 1130); GC: 4

julia> jls = @jimport java.lang.System
JavaObject{Symbol("java.lang.System")}

julia> jcall(jls, "getProperty", JString, (JString,), "java.version")
"11.0.12"

julia> versioninfo()
Julia Version 1.6.2
Commit 1b93d53fc4 (2021-07-14 15:36 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin18.7.0)
  CPU: Intel(R) Core(TM) i7-4770HQ CPU @ 2.20GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-11.0.1 (ORCJIT, haswell)
Environment:
  JULIA_COPY_STACKS = 1

[mkitti]

Perhaps this is a variation of a known issue:
https://github.com/JuliaInterop/JavaCall.jl/blob/575f4514a1604c8c880667ee6e1398ecdf94647c/doc/faq.md#segault-on-osx

Have you tried starting Julia with --handle-signals=no?

[KenziTrader]

Yes, starting Julia 1.6.3 with --handle-signals=no works.

Strange that in 1.6.2 the Segmentation fault doesn't cause Julia to crash but in 1.6.3 it does.

[mkitti]

I suspect https://github.com/JuliaLang/julia/pull/40056/files may have affected this.

[KenziTrader]

But with --handle-signals=no I cannot stop my Pluto server anymore with Ctrl+C. I have to use kill -9.

[mkitti]

I talked to @vtjnash on Slack and confirmed that JuliaLang/julia#40056 is at the heart of this change. We may be stuck until we implement signal chaining for Julia.

As we wait for Julia to attempt to address this upstream, can you see if JavaCall.init("-Xrs") helps? -Xrs is the Java counter part to Julia's --handle-signals=no.

https://docs.oracle.com/en/java/javase/11/tools/java.html#GUID-3B1CE181-CD30-4178-9602-230B800D4FAE

[KenziTrader]

Regretfully also JavaCall.init("-Xrs") crashes Julia 1.6.3 on MacOS.

[mkitti]

Are you able to use any other version of Java?

Another way to do this, might be starting Java first, and then Julia. In this case, we may be able to take advantage of Java's signal chaining. The main reason I'm asking about Java versions is that newer Java versions (16+) have a new incubating facility to call into native code ( https://docs.oracle.com/en/java/javase/16/docs/api/jdk.incubator.foreign/jdk/incubator/foreign/package-summary.html )

[KenziTrader]

Also with Java SE 17 it crashes Julia with and without -Xrs.

I don't know how to start Java first and then Julia.

For the time being I'll start Julia with --handle-signals=no.