On Thu, 4 Mar 2021 00:02:04 GMT, Yasumasa Suenaga <ysuen...@openjdk.org> wrote:

>> `attach` command on CLHSDB supports to attach live process (PID) and 
>> coredump, but it cannot connect to debug server. CLHSDB does not have a 
>> command to connect to debug server.
>> 
>> Other jhsdb commands (jstack, jmap, etc...) can connect debug server via 
>> `--connect` option, so CLHSDB should connect to it.
>> 
>> After this change, you can connect to debug server with 'connect <hostname>'.
>
> Yasumasa Suenaga has updated the pull request incrementally with one 
> additional commit since the last revision:
> 
>   Update error message in CLHSDB

test/hotspot/jtreg/serviceability/sa/sadebugd/ClhsdbAttachToDebugServer.java 
line 95:

> 93:             out.shouldMatch("^java/lang/Object @0x[0-9a-f]+$"); // for 
> "class java.lang.Object"
> 94:             out.shouldMatch("^java/lang/String @0x[0-9a-f]+$"); // for 
> "class java.lang.String"
> 95:             out.shouldHaveExitValue(0);

I think you should do more error checking here. If you look at ClhsdbLauncher 
you will see:
        // This will detect most SA failures, including during the attach.
        oa.shouldNotMatch("^sun.jvm.hotspot.debugger.DebuggerException:.*$");
        // This will detect unexpected exceptions, like NPEs and asserts, that 
are caught
        // by sun.jvm.hotspot.CommandProcessor.
        oa.shouldNotMatch("^Error: .*$");
I think you could use something similar here.

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

PR: https://git.openjdk.java.net/jdk/pull/2773

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