[jdk11u-dev] RFR: 8264752: SIGFPE crash with option FlightRecorderOptions:threadbuffersize=30M [v3]

[Hui Shi]

> Please help review backport of JDK-8264752 related to JFR.
> This backport also includes successive build failure fix JDK-8266206 (for older gcc version).
> 
> Applied almost cleanly on jdk11u, except copyright year in license and ClassFileInstaller build/use in test/jdk/jdk/jfr/startupargs/TestBadOptionValues.java.
> 
> Tested on Linux X64 tier1/tier2/tier3 release/fastdebug no regression. test/jdk/jdk/jfr test pass with release/fastdebug.
> New test added in this PR also pass.

Hui Shi has updated the pull request incrementally with one additional commit since the last revision:

  Backport 21f65f8e79b25b8367fc8d177b5f156b3575c89e

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

Changes:
  - all: https://git.openjdk.java.net/jdk11u-dev/pull/52/files
  - new: https://git.openjdk.java.net/jdk11u-dev/pull/52/files/8db719ef..02324713

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=52&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=52&range=01-02

  Stats: 4 lines in 1 file changed: 1 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/52.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/52/head:pull/52

PR: https://git.openjdk.java.net/jdk11u-dev/pull/52