[9] RFR(M): 8078554: Compiler: implement ranges (optionally constraints) for those flags that have them missing

[Zoltán Majó]

Hi,


please review the following patch for JDK-8078554.

Bug: https://bugs.openjdk.java.net/browse/JDK-8078554

Problem: JEP-245 [1] proposes to validate all flags passed to the JVM at 
the command-line. The goal of the JEP-245 is to avoid VM crashes caused 
by flags having incorrect values. Instead, the JVM should print out an 
error message meaningful to the user. The current issue is a sub-task of 
JEP-245 and changes the handling of flags controlling the compiler.

Solution: Flags can be checked against predefined ranges and/or 
constraints. This patch define ranges or constraints to all 
compiler-related flags.

Webrev: http://cr.openjdk.java.net/~zmajo/8078554/

Testing:
- JPRT (incl. the currently disabled 
runtime/CommandLine/OptionsValidation/TestOptionsWithRanges.java test);
- all hotspot tests (incl. TestOptionsWithRanges.java) executed on all 
platforms (incl. embedded).

Thank you and best regards,


Zoltan

[1] https://bugs.openjdk.java.net/browse/JDK-8059557