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JavaCall crashes Julia 1.6.3 on macOS #151
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Thanks for the issue. Have you tried this on any other operating systems?
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)
In Julia 1.6.2 I also get the
Segmentation faultbut it doesn't crash. In v1.6.3 or v1.7.0-rc1 is crashes the Julia session. I also tried it withoutJULIA_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 = 1Perhaps this is a variation of a known issue:
https://github.com/JuliaInterop/JavaCall.jl/blob/575f4514a1604c8c880667ee6e1398ecdf94647c/doc/faq.md#segault-on-osxHave you tried starting Julia with
--handle-signals=no?Yes, starting Julia 1.6.3 with
--handle-signals=noworks.Strange that in 1.6.2 the
Segmentation faultdoesn't cause Julia to crash but in 1.6.3 it does.I suspect https://github.com/JuliaLang/julia/pull/40056/files may have affected this.
- changed the title
[-]JavaCall segfaults on Julia 1.6.3[/-][+]JavaCall crashes Julia 1.6.3 on macOS[/+]on Oct 11, 2021 But with
--handle-signals=noI cannot stop myPlutoserver anymore withCtrl+C. I have to usekill -9.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?-Xrsis 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
Regretfully also
JavaCall.init("-Xrs")crashes Julia 1.6.3 on MacOS.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 )
Also with
Java SE 17it 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.In CI, I see that with a recent Java and Julia version on OS X x86, this works fine.
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.