jvm - Why are there some methods in java.base cannot be compiled by AOT compiler -


according jep-295 (http://openjdk.java.net/jeps/295)

there methods in java.base causing compilation failure, why?

it appreciated can me can realize limitation of openjdk aot compiler.

see documentation linking to:

current aot limitations ...

may not compile java code uses dynamically generated classes , bytecode (lambda expressions, invoke dynamic).

these limitations may addressed in future releases.

thus 2 potential explanations:

  1. the methods not compile fall known limitations
  2. otherwise, bug in "brand new, experimental" product

most "option 2" better explanation - see again link.

it contains list of methods fail compilation, error occurs:

cat java.base-list.txt  # jaotc: java.lang.stackoverflowerror exclude sun.util.resources.localenames.getcontents()[[ljava/lang/object; exclude sun.util.resources.timezonenames.getcontents()[[ljava/lang/object; exclude sun.util.resources.cldr.localenames.getcontents()[[ljava/lang/object; exclude sun.util.resources..*.localenames_.*.getcontents\(\)\[\[ljava/lang/object; exclude sun.util.resources..*.localenames_.*_.*.getcontents\(\)\[\[ljava/lang/object; exclude sun.util.resources..*.timezonenames_.*.getcontents\(\)\[\[ljava/lang/object; exclude sun.util.resources..*.timezonenames_.*_.*.getcontents\(\)\[\[ljava/lang/object; # java.lang.error: trampoline must not defined bootstrap classloader exclude sun.reflect.misc.trampoline.<clinit>()v exclude sun.reflect.misc.trampoline.invoke(ljava/lang/reflect/method;ljava/lang/object;[ljava/lang/object;)ljava/lang/object; # jvm asserts exclude com.sun.crypto.provider.aeswrapcipher.engineunwrap([bljava/lang/string;i)ljava/security/key; exclude sun.security.ssl.* exclude sun.net.registereddomain.<clinit>()v # huge methods exclude jdk.internal.module.systemmodules.descriptors()[ljava/lang/module/moduledescriptor;

and when check sources, example getcontents() - no lambdas there.

so methods fail compilation most likely caused fact new compiler "not yet ready" compile arbitrary java source code!


Comments

Post a Comment

Popular posts from this blog

php - Vagrant up error - Uncaught Reflection Exception: Class DOMDocument does not exist -

i've set bento/ubuntu-16.04 vagrant box using php 5.6, , getting following error quite few times when try , run shell script: "uncaught reflection exception: class domdocument not exist". i've tried adding following top of script (not together), each no success: "sudo apt-get install php5.6-xml", "sudo apt-get install php5-xml", "sudo apt-get install php-dom" i've tried resetting server "sudo service apache2 restart". does have suggestions?
Read more

vue.js - Create hooks for automated testing -

Image
qa guys complained can't automate frontend testing. because our html looks same outside. lazy hack did this <template> <div :role="$options.name"> ... </div> </template> <script> export default { name: 'vmcomponentname' } </script> which takes name script , applies html. in browser get: <div role="vmcomponentname"> ... </div> line :role="$options.name" goes in every component. is there dry er solutions? please share. additional details i'll explain in details looking for. imagine have vmusercreate form creates user. test case can create user . to automatically test without role, have use following selector: .wrapper > .wrapper > .wrapper > .submit-button the test extremely brittle (will break lot). if use roles can use [role="vmusercreateform"] .submit-button selector. many folds less brittle. so basically, i'm ...
Read more

Add new key value to json node in java -

i have json file : { "id":1, "name":"abc", "addressdetails": { "city":"newyork" } } i wanted add 1 more key-value ("pincode" : "414141") node 'addressdetails'. i tried using : objectmapper mapper = new objectmapper(); jsonnode root = mapper.readtree(new file("d://test.json")); objectnode node = mapper.createobjectnode(); node.with("addressdetails").put("pincode", "414141"); but it's not getting added, there way can ? you can try you should modify file path objectmapper mapper = new objectmapper(); objectnode nodes = mapper.readvalue(new file("d:\\test.txt"), objectnode.class); nodes.with("addressdetails").put("pincode", "414141"); mapper.writer().writevalue(new file("d:\\test.txt"), nodes);
Read more