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/ / builderscon Tokyo PHP JVM Hello World © - BASE, Inc.

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© - BASE, Inc. Who am I? (@m m r ) BASE PHP, React

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© - BASE, Inc. PHP JVM

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© - BASE, Inc. Hello World JVM PHP JVM

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© - BASE, Inc. PHP JVM Specification Java

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© - BASE, Inc. PHP JVM PHPerKaigi https://speakerdeck.com/memory /phperkaigi-

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© - BASE, Inc. PHP JVM OSS ( ) https://github.com/php-java/php-java

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1. JDK JDK

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2. 


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JVM PHP

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© - BASE, Inc. PHP JVM

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© - BASE, Inc. PHP

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© - BASE, Inc.

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© - BASE, Inc. 2014 2015 1 30 nbproject Netbeans C:\\ 
 Windows 1 
 (Hello World ) 
 ( )

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© - BASE, Inc.

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© - BASE, Inc.

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© - BASE, Inc.

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© - BASE, Inc.

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© - BASE, Inc.

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© - BASE, Inc.

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© - BASE, Inc.

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© - BASE, Inc. Wikipedia JVM 
 PHP ( ) https://en.wikipedia.org/wiki/List_of_Java_virtual_machines JPHP Java PHP ( ) https://github.com/jphp-group/jphp

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© - BASE, Inc. PHP

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© - BASE, Inc. PHP PHP PHP Laravel 
 PHP 
 JVM

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© - BASE, Inc. PHP JVM

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JVM

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© - BASE, Inc. JVM JVM class 
 (= ) 


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© - BASE, Inc. JVM class javac java JAR (Java ARchive) class kotlinc -include-runtime class 
 JAR Scala sbt-assembly JAR

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© - BASE, Inc. JVM JVM C CPU Oracle 
 PHP Rust ( ) invoke_*

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© - BASE, Inc. JVM 3 PHP PHP class

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© - BASE, Inc. JVM PHP PHP class

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© - BASE, Inc. JVM PHP class PHPerKaigi 
 https://speakerdeck.com/memory /phperkaigi-

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© - BASE, Inc. PHP JVM

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PHP

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PHP

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© - BASE, Inc. PHP PHP Object java.lang.Object? String Void Integer, Long OK

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© - BASE, Inc. PHP Swoole parallel 
 


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© - BASE, Inc. PHP PHP Exception Java java.lang.Object

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© - BASE, Inc. Hello World JVM PHP JVM

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JVM

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OpCode

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OpCode

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© - BASE, Inc. 1 JVM 算

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© - BASE, Inc. CPU mov rax, rbx ( 0x ) 1, 2

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© - BASE, Inc. JVM ldc # ( 0x ) #3 Constant Pool 3

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Constant Pool

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© - BASE, Inc. Constant Pool Constant Pool 
 The Java Virtual Machine maintains a per-type constant pool, a run- time data structure that serves many of the purposes of the symbol table of a conventional programming language implementation. Java Virtual Machine Specification : : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . Constant Pool Hello World 
 JVM Constant Pool

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© - BASE, Inc. Constant Pool Constant Pool 
 Java Virtual Machine Constant Pool ( ) Java Virtual Machine Specification : : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . Constant Pool Hello World 
 JVM Constant Pool

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© - BASE, Inc. Constant Pool Constant Pool

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© - BASE, Inc. Constant Pool Constant Pool Constant Pool

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© - BASE, Inc. Hello World JVM PHP JVM

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Hello World

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No content

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© - BASE, Inc. PHP JDK

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© - BASE, Inc. java javap Constant Pool 
 javac Java php

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Java

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© - BASE, Inc. Java

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Hello World

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© - BASE, Inc. Hello World Hello World ClassFile Structure 
 Constant Pool Methodref 
 Constant Pool Code Attribute Code Attribute Constant Pool : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- .

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No content

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© - BASE, Inc. ClassFile Structure Code Attribute 1 Constant Pool

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© - BASE, Inc. ClassFile Structure Code Attribute 1 Constant Pool

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ClassFile Structure

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© - BASE, Inc. ClassFile Structure ClassFile Structure 
 Java Constant Pool etc : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- .

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© - BASE, Inc. ClassFile Structure : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . JVM Specification

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© - BASE, Inc. ClassFile Structure : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . JVM Specification

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© - BASE, Inc. ClassFile Structure javac 
 : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . javac -encoding UTF- HelloWorld.java

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© - BASE, Inc. ClassFile Structure PHP 
 unpack fopen fread unpack https://gist.github.com/memory-agape/ d dce af ece e afb e caa e

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ClassFile Structure Constant Pool

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© - BASE, Inc. ClassFile Structure Code Attribute 1 Constant Pool

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© - BASE, Inc. Constant Pool : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . Constant Pool u unsigned short

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© - BASE, Inc. Constant Pool Constant Pool

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© - BASE, Inc. Constant Pool : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . Constant Pool 16bit 
 Constant Pool 
 JVM Specification

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© - BASE, Inc. Constant Pool : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . tag Constant Pool tag prefix CONSTANT_ छྨ ஋ छྨ ஋ Class 0x07 Fieldref 0x09 Methodref 0x0A InterfaceMethodref 0x0B String 0x08 Integer 0x03 Float 0x04 Long 0x05 Double 0x06 NameAndType 0x0C Utf8 0x01 MethodHandle 0x0F MethodType 0x10 InvokeDynamic 0x12

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© - BASE, Inc. Constant Pool : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . Hello World Class, Methodref, 
 String, Utf , NameAndType 5 छྨ ஋ छྨ ஋ Class 0x07 Fieldref 0x09 Methodref 0x0A InterfaceMethodref 0x0B String 0x08 Integer 0x03 Float 0x04 Long 0x05 Double 0x06 NameAndType 0x0C Utf8 0x01 MethodHandle 0x0F MethodType 0x10 InvokeDynamic 0x12

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© - BASE, Inc. Constant Pool : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- .

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ClassFile Structure

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© - BASE, Inc. ClassFile Structure Code Attribute 1 Constant Pool

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© - BASE, Inc. : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . ClassFile Structure

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© - BASE, Inc. 
 CodeAttribute

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© - BASE, Inc. 
 CodeAttribute

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© - BASE, Inc. : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- .

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© - BASE, Inc. : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . CodeAttribute Constant Pool 
 ( CONSTANT_Utf )

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© - BASE, Inc. ClassFile Structure Code Attribute 1 Constant Pool

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Code Attribute

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© - BASE, Inc. Code Attribute Code Attribute 


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© - BASE, Inc. Code Attribute Code Attribute 


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© - BASE, Inc. Code Attribute

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© - BASE, Inc. Code Attribute

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© - BASE, Inc. ClassFile Structure Code Attribute 1 Constant Pool

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1

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javap

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© - BASE, Inc. javap 


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© - BASE, Inc. javap 
 main main #

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© - BASE, Inc. (java.lang.Object) main System.out.println Hello World!

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© - BASE, Inc. : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . χʔϞχοΫ Φϖίʔυ ໾ׂ getstatic 0xB2 Get static field from class ldc 0x12 Push item from run-time constant pool invokevirtual 0xB6 Invoke instance method; dispatch based on class return 0xB1 Return void from method

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© - BASE, Inc. : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . 
 χʔϞχοΫ Φϖίʔυ ໾ׂ getstatic 0xB2 ੩తϑΟʔϧυΛऔಘͯ͠ɺΦϖϥϯυελοΫʹੵΈ·͢ɻ ldc 0x12 Constant Pool ͔Β஋Λऔಘͯ͠ɺΦϖϥϯυελοΫʹੵΈ·͢ɻ invokevirtual 0xB6 ΦϖϥϯυελοΫͷ஋ΑΓɺΫϥε্ʹ͓͚ΔϝιουΛ࣮ߦ͠·͢ return 0xB1 void Λฦ͠·͢ɻPHP ͸੍໿͕͋Γɺ return; ͱͯ͠΋ null Λฦ͢࢓༷Ͱ͢

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© - BASE, Inc. (Operand Stack) JVM JVM PHPer array_push 
 array_pop

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No content

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© - BASE, Inc. public static main (String[]) main 
 ( ) ldc invokevirtual return getstatic

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© - BASE, Inc. public static main (String[]) main 
 ( ) getstatic ldc invokevirtual return System.out 


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© - BASE, Inc. public static main (String[]) main 
 ( ) ldc invokevirtual return getstatic java.lang.String (Hello World)

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© - BASE, Inc. public static main (String[]) main 
 ( ) getstatic ldc invokevirtual return System.out 
 Hello World

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© - BASE, Inc. public static main (String[]) main 
 ( ) getstatic ldc invokevirtual return void 
 PHP void

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Code Attribute

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© - BASE, Inc. Code Attribute main 16 B B B

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© - BASE, Inc. Code Attribute main 16 B B B getstatic getstatic (Constant Pool 2 )

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© - BASE, Inc. Code Attribute main 16 B B B ldc ldc (Constant Pool 3 )

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© - BASE, Inc. Code Attribute main 16 B B B invokevirtual invokevirtual (Constant Pool 4 )

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© - BASE, Inc. Code Attribute main 16 B B B return

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PHP

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No content

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© - BASE, Inc. PHP

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getstatic

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© - BASE, Inc. getstatic getstatic 2 (operand[ ] << ) | operand[ ] unsigned short Constant Pool Constant Pool Operand Stack 
 PHP unsigned short unpack 
 PHP 
 PHP unsigned short v n 
 n : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic

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© - BASE, Inc. getstatic : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic

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© - BASE, Inc. getstatic : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic 2 unsigned short

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© - BASE, Inc. getstatic : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic java.lang.System Constant Pool

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© - BASE, Inc. getstatic : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic out Constant Pool

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© - BASE, Inc. getstatic : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic out Constant Pool PrintStream out

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© - BASE, Inc. getstatic : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic java/lang/System PHP 
 java\lang\System

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© - BASE, Inc. getstatic : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic

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ldc

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© - BASE, Inc. ldc ldc 1 Constant Pool int, float, , ldc ldc_w ldc _w : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic

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© - BASE, Inc. ldc : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic

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© - BASE, Inc. ldc : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic 1 
 Constant Pool

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© - BASE, Inc. ldc : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic Constant Pool 
 Constant Pool 
 Constant Pool Hello World

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© - BASE, Inc. ldc : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic Hello World

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invokevirtual

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© - BASE, Inc. invokevirtual invokevirtual invokevirtual 
 invoke php-java 
 invokevirtual 2 Constant Pool descriptor_index 範 
 : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .invokevirtual

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© - BASE, Inc. invokevirtual invokevirtual Hello World 


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© - BASE, Inc. invokevirtual invokevirtual Hello World 
 2

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© - BASE, Inc. invokevirtual : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic invokevirtual Hello World 
 
 NameAndType Structure

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© - BASE, Inc. invokevirtual invokevirtual Hello World 
 
 ;

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© - BASE, Inc. invokevirtual invokevirtual Hello World 
 
 1 範

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© - BASE, Inc. invokevirtual invokevirtual Hello World 


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© - BASE, Inc. invokevirtual invokevirtual Hello World 
 java/lang/System.out.println

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java/lang/System.out.println

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No content

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java\lang\System.out

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© - BASE, Inc. java\lang\System.out : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic $out PrintStream 
 PHP 


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java\io\PrintStream.println

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© - BASE, Inc. java\io\PrintStream.println : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic java\lang\System.out PrintStream 
 PrintStream

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php

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© - BASE, Inc. php DEMONSTRATION

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Hello World

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return

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© - BASE, Inc. return return void PHP void return ireturn, freturn, areturn dreturn monitorexit 
 : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .return

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© - BASE, Inc. return : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic return

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© - BASE, Inc. return : https://docs.oracle.com/javase/specs/jvms/se /html/jvms- .html#jvms- . .getstatic return while break 
 PHP break continue 


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Hello World

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THANK YOU FOR YOUR LISTENING