JDK-8157986 : Runtime support for javac to determine arguments to the runtime environment
  • Type: Enhancement
  • Component: core-libs
  • Sub-Component: java.lang
  • Affected Version: 9
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2016-05-26
  • Updated: 2016-06-16
  • Resolved: 2016-05-27
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JDK 9
9 b121Fixed
Related Reports
Relates :  
JDK-8159630 - Add new test for jdk.internal.misc.VM::getRuntimeArguments
Relates :  
JDK-8156998 - javac should support new option -XinheritRuntimeEnvironment
Relates :  
JDK-8159675 - Define specification for JVM_GetJvmArguments
Description
javac needs a way to determine the VM arguments to the runtime environment.  

ProcessHandle.Info::arguments returns the arguments to the process.  When javac is launched on the command-line, ProcessHandle.Info::arguments returns the arguments to javac rather than the runtime environment in javac.
Comments
RuntimeMXBean::getInputArguments returns the input arguments to the VM but this will pull in java.rmi which of course jdk.compiler would avoid. This issue refactors the existing support and provides a private API for javac to experiment. We should also determine whether a public Java SE API is useful to be provided for other use cases in the future.
26-05-2016