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[java] Run finalisers only if main/2 returns normally

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finalisers should be executed only if main/2 returns normally, it does not
throw an exception.  The C backends already do this correctly but the Java
backend did not.  The C# backend has the same bug, this patch does not fix
the C# backend.

java/runtime/MercuryThreadPool.java:
    Add a parameter to the shutdown() method to specify whether the backend
    is aborting.

    In runMain(), run finalisers only if the runtime is exiting normally.

java/runtime/MercuryRuntime.java:
    Add a new finalise() method that takes a parameter allowing standalone
    Java applications to specify whether or not they are aborting when the
    finalise the RTS.

doc/reference_manual.texi:
    Specify the behaviour of finalise directives if main/2 terminates
    with an uncaught exception.

samples/java_interface/standalone_java/JavaMain.java:
    Conform to changes in MercuryRuntime.java.
This commit is contained in:
Paul Bone
2014-12-29 22:34:15 +11:00
parent c60aab937b
commit 21fb0a74fc
4 changed files with 43 additions and 13 deletions
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6
samples/java_interface/standalone_java/JavaMain.java
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@@ -35,9 +35,11 @@ public class JavaMain {
// This call will invoke any finalisers specified using
// ':- finalise' declarations in the set of Mercury libraries we
// are using. It also tells the thread pool to shutdown, if the
// thread pool is not running then this does nothing.
// thread pool is not running then this does nothing. Set the
// parameter to "true" if the program is aborting (finalisers
// will be skipped).
//
MercuryRuntime.finalise();
MercuryRuntime.finalise(false);
// The Mercury exit status (as set by io.set_exit_status/1) may
// be read from the MercuryRuntime class.