On Wed, 19 Jan 2022 08:36:38 GMT, Thomas Stuefe <stu...@openjdk.org> wrote:
>> I would not print anything here, first because it is in the signal handler >> and secondly I don't think it is needed. No real thread dump usages are >> going to hit a VM that hasn't initialized yet IMO. > >> This is in the signal handler. Is it safe to print message or do something >> complex? > > raw write to stdout should be fine I think. > >>I would not print anything here, first because it is in the signal handler >>and secondly I don't think it is needed. No real thread dump usages are going >>to hit a VM that hasn't initialized yet IMO. > > Might be nice for the user to know why his jcmd or kill -3 gets ignored > though. because JVM_HANDLE_XXX_SIGNAL is installed in os::init_2(), it's safe to use log. I added a log entry with the tag os+init. -Xlog:os+init=info will print out a message "ignore BREAK_SIGNAL in the initialization phase." I also update the testing example in the description section. ------------- PR: https://git.openjdk.java.net/jdk/pull/7003
