On Sat, 26 Jun 2021 23:55:46 GMT, Weijun Wang <[email protected]> wrote:
>> src/jdk.attach/share/classes/sun/tools/attach/HotSpotVirtualMachine.java
>> line 53:
>>
>>> 51: private static final long CURRENT_PID =
>>> AccessController.doPrivileged(
>>> 52: (PrivilegedAction<ProcessHandle>)
>>> ProcessHandle::current).pid();
>>> 53:
>>
>> The original code separated out the declaration of the PrivilegedAction to
>> avoid this cast. If you move the code from the original static initializer
>> into a static method that it called from initializer then it might provide
>> you with a cleaner way to refactor this. There are several other places in
>> this patch that could do with similar cleanup.
>
> This cast is only to tell the compiler which overloaded method to call, and I
> don't think there will be a real cast at runtime. It might look a little ugly
> but extracting it into a variable declaration/definition plus a new
> `initStatic` method seems not worth doing, IMHO.
Why not simply declare a local variable in the static initializer below?
private static final long CURRENT_PID;
private static final boolean ALLOW_ATTACH_SELF;
static {
PrivilegedAction<ProcessHandle> pa = ProcessHandle::current;
@SuppressWarnings("removal")
long pid = AccessController.doPrivileged(pa).pid();
CURRENT_PID = pid;
String s = VM.getSavedProperty("jdk.attach.allowAttachSelf");
ALLOW_ATTACH_SELF = "".equals(s) || Boolean.parseBoolean(s);
}
-------------
PR: https://git.openjdk.java.net/jdk17/pull/152
