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From "Salikh Zakirov (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-1363) [drlvm] Java 1.5, 64 bit support, JVMTI improvements
Date Thu, 31 Aug 2006 14:26:22 GMT
[drlvm] Java 1.5, 64 bit support, JVMTI improvements

                 Key: HARMONY-1363
                 URL: http://issues.apache.org/jira/browse/HARMONY-1363
             Project: Harmony
          Issue Type: New Feature
          Components: Contributions, DRLVM
         Environment: Linux/i686, Windows/i686, Linux/x86_64, Linux/ia64
            Reporter: Salikh Zakirov

This patch includes:

* Java 1.5 support
* Intel 64 (aka EM64T aka x86_64) support in VM and JIT 
* IA-64 (aka IPF) code generator in JIT 
* Improvements in JIT code
* Improvements in JVMTI support

New JIT features and improvements

* Software-based edge profiling framework 
* High-Level Optimizer enabled (client and server, static and recompilation
  modes, edge profile support) 
* Compilation Pipeline Management Framework (PMF) - consistent configuration
  control based on system properties 
* Unified Control Flow Graph (CFG) and basic algorithms for the high-level
  optimizer and the IA-32/Intel 64 Code Generator 
* Unified logging system for both Jitrino.JET and Jitrino.OPT 
* More comments added to interface header files 
* New high-level optimizations developed: 
* Escape Analysis based synchronization elimination (prototype for Windows/IA-32 only) 
* Optimization for System.arraycopy calls 
* Moving ldInterface out of the loop 

IA-32/Intel 64 Code Generator
* Graph Coloring register allocator implemented 
* Optimization for loading String constants 

Bugs in the JIT code fixed

* uncaught exception in case HLO turn on 
* jitrino.dll failure during gc execution 
* DRLVM crashes on Linux IA-32 with "-Xjit opt::skip=off" switch 
* OPT fails with statprof before inliner 
* bytecode mapping does not estimate CFG extension from inliner 
* Memory leaks in Jitrino MemoryManager 
* Memory leak in DrlEMFactory::createAndInitEMInstance() for emInstance 
* Memory leak in RuntimeInterface::getGCRootSet() for gcSite 
* mpegaudio hangs in -Xem opt mode 
* Memory leak in LazyExceptionOpt::doLazyExceptionOpt() for optCandidates 
* Memory leak in LazyExceptionOpt::addOptCandidates() for thrinst 
* VM can not start threads which throw a lot of exceptions 
* Jitrino.OPT does not call finalize() method of some exception class 
* incorrect usage of Flow Graph 
* incorrect usage of lazyexc opt pass 
* Arithmetic helpers should be changed to directly generated code 
* Jitrino.OPT crashes when null value is assigned to some field of non-existent type 

Java 1.5 support

* Added complete parsing of the v49 class-files format; 
* Implemented all 1.5 runtime features of kernel classes; 
* Implemented Java assertions; 
* Simplified and optimized reflection mechanism; 
* Added ldc class_literal support to Jitrino.OPT; 
* Assorted fixes in verifier, class support, kernels, etc. 
* Added the unit test suite for all kernel classes. 

JVMTI support

* JIT is the default execution mode when JVMTI is enabled
* Support of METHOD_ENTRY/EXIT events implemented in Jitrino.JET 
* Decoding capabilities has been added to IA32/EM64T encoder 
* Implemented ExceptionCatch, MethodEntry/MethodExit and field watches for JIT
* Implemented ExceptionCatch support in interpreter
* Fixed GetObjectMonitorUsge function
* Fixed DisposeEnvironment function
* Fixed checks for validity of class objects
* Fixed bug in RelinquishCapabilities function (Fixed bug in code, that resets global capabilities)
* Fixed JVMTI Extensions implementation
* Fixed JVMTI breakpoints on JIT not to handle anything when JVMTI is not enabled
* Fixed method entry event: frame.ip should be initialized before the callback on interpreter

Known issues

* Intel 64 needs Intel 64-compatible class library to run 
* IA-64 support is not complete 

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