JDK-6404550 : Cannot implement late attach in NetBeans Profiler due to missing functionality in JVMTI
  • Type: Bug
  • Component: hotspot
  • Sub-Component: jvmti
  • Affected Version: 6
  • Priority: P1
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2006-03-27
  • Updated: 2024-04-03
  • Resolved: 2006-05-04
The Version table provides details related to the release that this issue/RFE will be addressed.

Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.

To download the current JDK release, click here.
JDK 6
6 b83Fixed
Related Reports
Duplicate :  
JDK-6341303 - JVMTI Spec: Need a way how to rebind Object.wait and Thread.sleep with late attach
Duplicate :  
JDK-6409915 - assertion failure in compiler on retransformation -- old methods not in context
Relates :  
JDK-5002268 - Allow class sharing use with RedefineClasses
Relates :  
JDK-6430256 - removing native method wrapper via retransformation fails
Relates :  
JDK-6875393 - JNI itable index cache is broken
Relates :  
JDK-6862945 - conversion of jmethodID to methodOop in JVMTI is too expensive
Relates :  
JDK-8313332 - Simplify lazy jmethodID cache in InstanceKlass
Relates :  
JDK-6667089 - multiple redefinitions of a class break reflection
Relates :  
JDK-8192936 - RI does not follow the JVMTI RedefineClasses spec that is too strict in the definition
Description
Currently there are two problems which block successful implementation of late attach functionality in NetBeans Profiler.

1) To be able to determine time spent waiting/sleeping we use NativeMethodBind to intercept Thread.sleep and Object.wait, In the case of late attach, we cannot use NativeMethodBind. We need to be able to instrument native methods (such as mentioned Object.wait and Thread.sleep).

2) RedefineClasses/RetransformClasses doesn't work for classes in the shared archive. When the NetBeans Profiler is started at launch time, class sharing is automatically disabled by the setting of capabilities.  In the case of late attach, some classes will be in the shared archive and they can not be instrumented. We need a way how to instrument classes in shared archive.
The shared archive part of this bug should be tracked via the following:

5002268 4/3 Allow class sharing use with RedefineClasses
Comments
EVALUATION These are blockers for NB Profiler and similar tools to be able to use the attach on demand functionality in Mustang.
27-03-2006