MacOS FutureTask.get race (sort of)

[Michael Hall]

On Oct 31, 2011, at 10:07 AM, Jason Schroeder wrote:

> I hope mentioning the race contained in this example is appropriate.  I can
> only force this bug to appear with the MacOS jvm.
> 
> How can I be of useful assistance?
> 
> // $ java -version
> // java version "1.6.0_27"
> // Java(TM) SE Runtime Environment (build 1.6.0_27-b07-393-11M3511)
> // Java HotSpot(TM) 64-Bit Server VM (build 20.2-b06-393, mixed mode)
> //

I think the JVM you show is the current Apple one not openjdk isn't it?

Do we bug report race conditions, if I'm understanding your use correctly is sort of an interesting question.
I just got this...

Thread 16 Crashed:  Java: AWT-EventQueue-0
0   libSystem.B.dylib             	0x91b1ac5a __kill + 10
1   libSystem.B.dylib             	0x91b1ac4c kill$UNIX2003 + 32
2   libSystem.B.dylib             	0x91bad5a5 raise + 26
3   libSystem.B.dylib             	0x91bc36e4 abort + 93
4   libjvm.dylib                  	0x01843a7f os::abort(bool) + 25
5   libjvm.dylib                  	0x0185cf5a VMError::report_and_die() + 2476
6   libjvm.dylib                  	0x01c9c053 crash_handler(int, __siginfo*, void*) + 128
7   libSystem.B.dylib             	0x91b2005b _sigtramp + 43
8   ???                           	0xffffffff 0 + 4294967295
9   libjvm.dylib                  	0x0185be76 VMError::report(outputStream*) + 2740
10  libjvm.dylib                  	0x0185cc04 VMError::report_and_die() + 1622
11  libjvm.dylib                  	0x01bc725f JVM_handle_bsd_signal + 1397
12  libjvm.dylib                  	0x01bc4bea signalHandler(int, __siginfo*, void*) + 42
13  libSystem.B.dylib             	0x91b2005b _sigtramp + 43
14  ???                           	0xffffffff 0 + 4294967295

In a crash log.

I thought Eclipse was showing a related SIGSEGV in it's console too but now I'm not seeing that.

Probably because I restarted to see if I could reproduce.

So far no go.

So how do I know if it was my code not properly using invokeLater or something or a jvm race condition?
So I suppose not worth the bug report?

Pretty sure mine is openjdk this time anyhow.

set java.* | grep version
System.in:3:java.runtime.version=1.7.0-ea-b215
System.in:4:java.version=1.7.0-ea
System.in:7:java.class.version=51.0
System.in:10:java.vm.version=21.0-b17
System.in:20:java.vm.specification.version=1.7
System.in:27:java.specification.version=1.7