RFR: 8253742: POSIX signal code cleanup [v7]

[Thomas Stuefe]

On Tue, 17 Nov 2020 15:23:38 GMT, Gerard Ziemski <gziemski at openjdk.org> wrote:

>> src/hotspot/os/posix/signals_posix.cpp line 1724:
>> 
>>> 1722:   // initialize suspend/resume support - must do this before signal_sets_init()
>>> 1723:   if (SR_initialize() != 0) {
>>> 1724:     perror("SR_initialize failed");
>> 
>> perror() is old :) does not make much sense here either since errno could be stale. Could you pls switch this to whatever we do at this point when facing an unrecoverable error (probly vm_exit_initialization or similar)
>
> Fixed, used `vm_exit_during_initialization(err_msg("SR_initialize failed"));`

No need for the err_msg here, just use the plain string literal.

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PR: https://git.openjdk.java.net/jdk/pull/636