New Tricks for phoneME Advanced - download - Java

New Tricks for 

phoneME 

Advanced 

Hinkmond Wong 

Senior Staff Engineer 

Sun Microsystems, Inc. 

Sun Confidential: CDA Only 1

Agenda 

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Review of phoneME Advanced 

Latest VM and Library Features 

PalmOS Port 

Windows Mobile Port 

Inclusion in Jalimo 

OpenCable TV Stack 

Demo 

Summary 

2008 Mobile and Embedded Developer Days 2

Agenda 

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PalmOS Port 




Demo 

Summary 



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Open source implementation of Java ME 

CDC 

Hosted in Subversion on java.net 

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https://phoneme.dev.java.net/source/browse/phoneme/ 

Part of Mobile and Embedded Community 

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http://www.mobileandembedded.org 

Email lists, forums, wikis, etc. 



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Advanced phones and consumer devices 

(Ref: Linux/x86) 

Contents: CDC/Foundation/Personal Basis/ 

Personal Profiles 

“CDC stack” 

● JSRs: 135 (MMAPI) and 172 (Web Serv) 



● GPL version 2 

● http://www.gnu.org/copyleft/gpl.html 

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Dual Licensed with Commercial License 

● Proprietary use 

● Compatible w/non-GPL licenses 


Repository Layout – 

Components 

components 

cdc 

. . . jsr120 midp jsr135 . . . 

cldc 

phoneME Advanced 

phoneME Feature 


Agenda 

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PalmOS Port 




Demo 

Summary 


phoneME Advanced MR3 

Latest Features - Part 1 

Feature Component 

Java Virtual Machine 

Tools Interface 

(JVMTI) 

CVM Inspector and 

cvmsh 

Growable/Shrinkable 

Java Heap 

Split Verifier 

Ahead-Of-Time 

Compiler (AOTC) 

Dual-Stack Support 

Description 

Java SE compatible debugging and 

profiling interface 

Navigation and inspection of CVM data 

structures 

Dynamic sizing of memory 

CLDC Preverification Optimization 

Pre-compilation of Java classes 

MIDP on CDC support 


phoneME Advanced MR3 

Latest Features - Part 2 

Feature Component 

Allow Unresolved 

Support 

TimeZone Data 

Updates 

Description 

ROMization without transitive closure 

Latest Olsen DB standard tz2008g 


JVMTI 

• JVMTI supported for debugging and profiling 

> Can be supported in production releases with minimal 

performance and footprint impact. 

• Profiling and Debugging using NetBeans supported via 

JVMTI 

• Debugging using Eclipse should work via JVMTI 

• Profiling with Eclipse can be supported with some effort 

• Debugging of JIT’d code not supported 


VM Inspector and cvmsh 

• Debug APIs available from C, Java, and cvmsh 

> Thread dumps 

> Heap dumps and snapshots 

> Object dumps 

> Find all references to objects 

• Build with CVM_DEBUG=true or CVM_INSPECTOR=true 

• http://wiki.java.net/bin/view/Mobileandembedded/PhoneM 

EAdvancedCVMSH 


Growable/Shrinkable Java Heap 

• Growable and shrinkable heap using mmap/mcommit on 

Linux 

> Garbage collector will adjust the size of the heap up or down 

after each GC based on current utilization. 

> Min size, max size, and start size can be set on the command 

line 


Split Verifier 

• Provides faster verification of classes containing 

StackMap attibutes 

> Generated by cldc preverifier tool 

> Generated by Java 6 version of javac 

• Build with CVM_SPLIT_VERIFIER=true 


AOT Compiler 

• Faster startup time for first application launch 

• Smoother startups (don’t get any pauses waiting for 

methods to compile). 

• Compilation done at runtime the first time VM is launched. 

> Compiled code is then mapped into memory the next time VM 

is launched. 

• Need to build with CVM_AOT=true. Must also build with 

CVM_PRELOAD_LIB=true or 

CVM_PRELOAD_SET=libfull. 


Dual Stack / API Hiding 

• Dual stack with API hiding supported 

> 1st stack is CDC/FP/SecOP 

> 2nd stack can be CLDC/MIDP/JSRs 

• CDC stack can be used for the AMS and by the 

implementation of MIDP and JSRs 

• API Hiding 

> Midlets do not have access to CDC/JavaSE stack 

> CDC/JavaSE stack does not have access to MIDP 

• Build with CVM_DUAL_STACK=true 


JCC -allowUnresolved Support 

• In CDC-HI 1.1.1, romized classes could only contain 

references to other romized classes 

> All constant pool references fully resolved at build time 

> This is known as “full transitive closure” 

• CDC-HI 1.1.2 supports unresolved constant pool entries 

> Romized classes can contain references to classes that are 

later dynamically loaded. 

> A much smaller set of classes can now be romized 

• CVM_PRELOAD_SET build option determines classes to 

be romized 


Timezone Data Update 

• Sync’d timezone data in CDC/FP source bundles to be 

same as what Java SE has released 

• Raw timzezone data files updated to latest Olsen DB set 

standard data files 

> tz2008g - ftp://elsie.nci.nih.gov/pub/ 

> CDC/FP subset (j2meref: Los Angeles/Novosibirsk/Calcutta) 

which is what is built by default, updated with new Russia 

tables from tz2008g 


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PalmOS Port 




Demo 

Summary 


PalmOS Port 

• Volunteers for PalmOS Port 

• No Full C Standard Library 

• No Multithreading Library Support 

• PRC-tools on PalmOS 

• LibC changes to compile on PalmOS 

• Evolution of PalmOS 


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PalmOS Port 




Demo 

Summary 



• Davy P.'s latest Windows Mobile Port 

• JSRs supported 

• MIDP 

• Personal Basis Profile and Personal Profile 

• Works in progress 


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PalmOS Port 




Demo 

Summary 


phoneME Advanced in Jalimo 

• Jalimo: free Java stack for mobile Linux devices 

• Develop APIs and tools 

• Maemo and OpenMoko 

• Robert Schuster and Ken Gilmer: OpenEmbedded 

receipts 

• Fast startup 

• Running on Nokia N800 


Agenda 

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PalmOS Port 




Demo 

Summary 


phoneME Advanced in OpenCable 

• New OpenCable project 

> https://opencable.dev.java.net 

• Middleware for OCAP spec. 

• TV set-top box or receiver software 

• Interoperability using open source 

• Tru2Way: interactive programming guides 


Agenda 

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PalmOS Port 




Demo 

Summary 


Demos 

• PhoneME Advanced 


Agenda 

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PalmOS Port 




Demo 

Summary 


Summary 

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Faster, better VM and libraries 

More ports to more devices 

Core used in other open source projects 

Growing use in more platforms 


Thank You! 

Q & A

New Tricks for phoneME Advanced - download - Java

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