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Overhaul ClassLoaderWeavingAdaptor to use statically initialised Unsafe
instances and method handles pointing to their 'defineClass' methods.
Those now work universally on JDKs 8-21. In older JDKs, the method used
to be in sun.misc.Unsafe, in more recent ones on jdk.internal.misc.Unsafe.
It is challenging to fetch instances, especially as reflection
protection and module boundaries have been increased in the JDK
progressively. But finally, a solution was adapted from Byte Buddy (BB).
Kudos to BB author Rafael Winterhalter. The previous solution to use
ClassLoader::defineClass and require '--add-opens' is no longer
necessary for the first time since it became necessary in AspectJ 1.9.7
with Java 16 support.
Add org.ow2.asm:asm-common as a dependency everywhere org.ow2.asm:asm
was used before. Maybe that is too many places, but no worse than before.
Add missing dependency on loadtime to aspectjweaver. This kept a build
like "mvn install -am -pl aspectjweaver" from picking up changed
loadtime classes.
Fixes #117.
Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>
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This was required by the Eclipse team as one precondition for the next
release.
Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>
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In two places, the documentation now contains this text:
"Since AspectJ 1.9.7, the obsolete Oracle/BEA JRockit agent is no longer
part of AspectJ. JRockit JDK never supported Java versions higher than
1.6. Several JRockit JVM features are now part of HotSpot and tools like
Mission Control available for OpenJDK and Oracle JDK."
The decision to drop JRockit support was made during a discussion
between Alexander Kriegisch and Andy Clement:
Andy Clement wrote on 26 Mar 2021:
> Yes I think so.
>
>
> Alexander Kriegisch wrote on 26 Mar 2021:
>
>> https://en.wikipedia.org/wiki/JRockit
>>
>> Can we get rid of that? AspectJ requires Java 8, JRockit never
>> supported more than Java 6.
Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>
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Due to JEP 260 (Encapsulate Most Internal APIs), aspect weaving on
Java 16 now requires '--add-opens java.base/java.lang=ALL-UNNAMED' on
the command line. Otherwise there will be illegal access exceptions for
some internal API calls AspectJ needs, most prominently when trying to
define classes in other packages or modules.
This had to be done on several levels:
- Maven Surefire: running tests in a JVM directly forked by Surefire.
In order to make this backwards compatible, I added two profiles
with JDK-level-dependent auto-activation, one 8-15 and one 16+. In
the latter a property containing the JVM parameter is defined, in
the former it is empty, i.e. the JVM is started without the
parameter. In Java 8 the parameter did not even exist, in Java 9+ we
could use it, but we need to test how users use AspectJ.
- RunSpec: Whenever an XML test is declared to use '<run>', we need to
determine the current JVM version and again dynamically add the
parameter when forking the target JVM.
- AntSpec: Whenever an XML test is declared to use '<ant>', we need to
determine the current JVM version dynamically add two properties
usable from within Ant scripts: 'aj.addOpensKey' and
'aj.addOpensValue'. Unfortunately, Ant needs to use two '<argLine>'
parameters, because the two parts of the option are separated by a
space character.
- Ant scripts: When triggered by an AntSpec, each Ant target using LTW
needs to manually set
<jvmarg value="${aj.addOpensKey}"/>
<jvmarg value="${aj.addOpensValue}"/>
for each '<java>' task. It was quite tedious to find all(?) of them.
TODO: In the AspectJ 1.9.7 release notes we need to document that this
parameter is now needed for LTW.
Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>
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agent testcase)
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duplicate aop.xml and -Dorg.aspectj.weaver.loadtime.configuration)
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AbortException in LTW message handler)
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weaving messages debug and add -debug to options for aop.xml)
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occur in LTW now.
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remember to build and commit testing-client.jar)
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(TestServer, TestServerTest and LTWServerTests)
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defined type, giving the super-loader chance to weave a type with ITDs.
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to prevent recursion in JDK 1.4 LTW)
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ClassPathManager to prevent recursion in JDK 1.4 LTW)
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with additional class weaving"
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determining if a path entry is a jar/zip (don't just rely on suffix, some new .bndl files seem to be becoming popular...)
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Matthew Webster for the patch)
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