[jdk17u-dev] RFR: 8292695: SIGQUIT and jcmd attaching mechanism does not work with signal chaining library [v3]

[Goetz Lindenmaier]

> Resolved signals_posix.cpp because test for do_check is not in 17.
> That was added by  8283337: Posix signal handler modification warning triggering incorrectly
> I add 8283337 to this backport as it is subsumed by 8292695.
> 
> Resolved os.cpp due to context.
> Context was changed by "8269466: Factor out the common code for initializing and starting internal VM JavaThreads"

Goetz Lindenmaier has updated the pull request incrementally with one additional commit since the last revision:

  Update signals_posix.cpp
  
  Adapt comment

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Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/834/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/834/files/67611936..4159c44a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=834&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=834&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/834.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/834/head:pull/834

PR: https://git.openjdk.org/jdk17u-dev/pull/834