PHP で JVM を実装して、 HelloWorld を出力してみる - Speaker Deck

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/ / PHPerKaigi PHP JVM HelloWorld © - BASE, Inc.

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© - BASE, Inc. Who am I? (@m m r ) BASE 6 SDVX

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© - BASE, Inc. Who am I?

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© - BASE, Inc. PHPerKaigi Builderscon

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© - BASE, Inc. php-java/php-java

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OSS

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© - BASE, Inc. JVM PHP

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© - BASE, Inc. Hello World

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JVM

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JVM

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© - BASE, Inc. JVM JVM Java Virtual Machine Java JVM JRE JDK

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JVM

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© - BASE, Inc. JVM Java class class JVM

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© - BASE, Inc. JVM JVM Java Virtual Machine Specification Oracle

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© - BASE, Inc. JVM

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© - BASE, Inc. JVM Java class

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© - BASE, Inc. JVM

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© - BASE, Inc. JVM class

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JVM

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© - BASE, Inc. Perl PHP JavaScript / Builderscon YAPC::Kyoto PHPerKaigi Qiita JVM

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JVM

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© - BASE, Inc. Rust Emacs Go Ruby rchaser gongoZ DQNEO Daiki Miura JVM

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JVM

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JVM,

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PHP

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© - BASE, Inc. fopen / fread OK

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© - BASE, Inc. 16 short, unsigned short, integer, unsigned integer pack / unpack JVM

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PHP

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© - BASE, Inc. PHP int (- ^ ^ - ) bool string float, double array null etc...

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Java

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© - BASE, Inc. Java byte char short (- ^ ^ - ) int (- ^ ^ - ) long (- ^ ^ - ) boolean float double

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PHP Java

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© - BASE, Inc. ( ) JVM invokevirtual iload / istore

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Hello World

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Java Virtual Machine Specification

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© - BASE, Inc. JVM Spec Java Virtual Machine Specification JVM Spec JVM Spec Oracle JVM https://docs.oracle.com/javase/specs/ index.html

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ClassFile Structure

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© - BASE, Inc. ClassFile Structure

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© - BASE, Inc. ClassFile Structure

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© - BASE, Inc. JVM Spec u unsigned int u unsigned short

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Hello World

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© - BASE, Inc. Constant Pool Method Info Code Attribute Hello World

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Method Info

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© - BASE, Inc. Method Info

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© - BASE, Inc. Method Info

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Code Attribute

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© - BASE, Inc. Code Attribute

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© - BASE, Inc. Code Attribute

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© - BASE, Inc. Code Attribute

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© - BASE, Inc. Code Attribute

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© - BASE, Inc. Code Attribute

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© - BASE, Inc. Code Attribute

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© - BASE, Inc. Code Attribute

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No content

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© - BASE, Inc. JVM Spec code[code_length] JVM Spec

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© - BASE, Inc. java.lang.System.out getstatic println invokevirtual

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© - BASE, Inc. Constant Pool ldc return

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4

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getstatic

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© - BASE, Inc. getstatic getstatic getstatic Constant Pool unsigned short

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© - BASE, Inc. getstatic getstatic <0xB > putstatic

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© - BASE, Inc. getstatic

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© - BASE, Inc. getstatic

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© - BASE, Inc. getstatic

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© - BASE, Inc. getstatic

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© - BASE, Inc. getstatic

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© - BASE, Inc. getstatic

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© - BASE, Inc. getstatic

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invokevirtual

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© - BASE, Inc. invokevirtual invokevirtual Constant Pool

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© - BASE, Inc. invokevirtual invokevirtual <0xB > invoke dynamic, special, interface, static

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© - BASE, Inc. invokevirtual invoke JVM invoke invokedynamic invokeinterface

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© - BASE, Inc. invokevirtual

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© - BASE, Inc. invokevirtual

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© - BASE, Inc. invokevirtual

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© - BASE, Inc. invokevirtual

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© - BASE, Inc. invokevirtual

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© - BASE, Inc. invokevirtual

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© - BASE, Inc. invokevirtual void

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ldc

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© - BASE, Inc. ldc ldc Constant Pool UTF Integer, short, byte Constant Pool unsigned byte

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© - BASE, Inc. ldc ldc Long Double

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© - BASE, Inc. ldc

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© - BASE, Inc. ldc Constant Pool

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© - BASE, Inc. ldc Constant Pool

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© - BASE, Inc. ldc

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return

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© - BASE, Inc. return return void moniterenter return areturn, ireturn, freturn, dreturn

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Hello World

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© - BASE, Inc. Hello World B NN MM NN B NN MM B

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© - BASE, Inc. Hello World B NN MM NN B NN MM B getstatic

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© - BASE, Inc. Hello World B NN MM NN B NN MM B unsigned short

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© - BASE, Inc. Hello World B NN MM NN B NN MM B ldc

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© - BASE, Inc. Hello World B NN MM NN B NN MM B unsigned byte Hello World Constant Pool

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© - BASE, Inc. Hello World B NN MM NN B NN MM B invokevirtual

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© - BASE, Inc. Hello World B NN MM NN B NN MM B unsigned short Constant Pool

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© - BASE, Inc. Hello World B NN MM NN B NN MM B return

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No content

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"java.lang.System"

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© - BASE, Inc. "java.lang.System" Java java.lang.System PHP "java\lang\System" System "out"

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© - BASE, Inc. "java.lang.System" ;

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"out"

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© - BASE, Inc. "out" PHP JVM static

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© - BASE, Inc. "out"

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© - BASE, Inc. "out"

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"println" "java.io.PrintStream"

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© - BASE, Inc. "java.io.PrintStream"

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Hello World

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DEMO

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THANK YOU FOR YOUR LISTENING