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

[Man Cao]

On Tue, 25 Oct 2022 11:51:38 GMT, Goetz Lindenmaier <goetz at openjdk.org> wrote:

> 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"

Thanks for the backport. Looks like https://bugs.openjdk.org/browse/JDK-8292695 didn't have "jdk17u-fix-request", and I just added the label.

The change to HotSpot looks good, but should we also include the `TestBreakSignalThreadDump.java` test in the backport?

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