[jdk8u-dev] RFR: 8288483: JAVA_TOOL_OPTIONS are silently truncated if they exceed 1024 bytes [v2]

[Dmitry Samersoff]

> The JAVA_TOOL_OPTIONS environment variable is used to pass additional JVM arguments.
> 
> The current implementation in jdk8 has an internal limit on the length of the option variable (1024 bytes) and the number of options (64).
> 
> A longer variable will be silently truncated and some options will be lost or the VM will exist with an unrecognized option error.
> 
> The fix is not a direct backport of the changes in the later JDKs, but I kept the code as close as possible to what we have in the latest jdk.
> 
> It's partial backport of relevant changes from JDK-8135195, JDK-8074895, JDK-8061999

Dmitry Samersoff has updated the pull request incrementally with one additional commit since the last revision:

  8288483: JAVA_TOOL_OPTIONS are silently truncated if they exceed 1024 bytes

-------------

Changes:
  - all: https://git.openjdk.org/jdk8u-dev/pull/74/files
  - new: https://git.openjdk.org/jdk8u-dev/pull/74/files/172de4c3..efab8d3e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=74&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=74&range=00-01

  Stats: 2 lines in 1 file changed: 1 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/74.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev pull/74/head:pull/74

PR: https://git.openjdk.org/jdk8u-dev/pull/74