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PHP で JVM を実装して、 HelloWorld を出力してみる
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memory
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February 09, 2020
Programming
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PHP で JVM を実装して、 HelloWorld を出力してみる
- PHPerKaigi 2020
- English Title:
Implement JVM with PHP and try to output Hello World
memory
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February 09, 2020
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Transcript
/ / PHPerKaigi PHP JVM HelloWorld © - BASE, Inc.
© - BASE, Inc. Who am I? (@m m r
) BASE 6 SDVX
© - BASE, Inc. Who am I?
None
© - BASE, Inc. PHPerKaigi Builderscon
© - BASE, Inc. php-java/php-java
OSS
None
© - BASE, Inc. JVM PHP
© - BASE, Inc. Hello World
JVM
JVM
© - BASE, Inc. JVM JVM Java Virtual Machine Java
JVM JRE JDK
JVM
<?php exec('java HelloWorld')
<?php exec('java HelloWorld')
© - BASE, Inc. JVM Java class class JVM
© - BASE, Inc. JVM JVM Java Virtual Machine Specification
Oracle
© - BASE, Inc. JVM
© - BASE, Inc. JVM Java class
© - BASE, Inc. JVM
© - BASE, Inc. JVM class
JVM
© - BASE, Inc. Perl PHP JavaScript / Builderscon YAPC::Kyoto
PHPerKaigi Qiita JVM
JVM
© - BASE, Inc. Rust Emacs Go Ruby rchaser gongoZ
DQNEO Daiki Miura JVM
JVM
JVM,
PHP
None
© - BASE, Inc. fopen / fread OK
None
© - BASE, Inc. 16 short, unsigned short, integer, unsigned
integer pack / unpack JVM
None
PHP
© - BASE, Inc. PHP int (- ^ ^ -
) bool string float, double array null etc...
Java
© - BASE, Inc. Java byte char short (- ^
^ - ) int (- ^ ^ - ) long (- ^ ^ - ) boolean float double
None
PHP Java
None
None
© - BASE, Inc. ( ) JVM invokevirtual iload /
istore
Hello World
Java Virtual Machine Specification
© - BASE, Inc. JVM Spec Java Virtual Machine Specification
JVM Spec JVM Spec Oracle JVM https://docs.oracle.com/javase/specs/ index.html
ClassFile Structure
© - BASE, Inc. ClassFile Structure
© - BASE, Inc. ClassFile Structure
© - BASE, Inc. JVM Spec u unsigned int u
unsigned short
Hello World
© - BASE, Inc. Constant Pool Method Info Code Attribute
Hello World
Method Info
© - BASE, Inc. Method Info
© - BASE, Inc. Method Info
Code Attribute
None
© - BASE, Inc. Code Attribute
© - BASE, Inc. Code Attribute
© - BASE, Inc. Code Attribute
© - BASE, Inc. Code Attribute
© - BASE, Inc. Code Attribute
© - BASE, Inc. Code Attribute
© - BASE, Inc. Code Attribute
None
© - BASE, Inc. JVM Spec code[code_length] JVM Spec
None
None
None
© - BASE, Inc. java.lang.System.out getstatic println invokevirtual
© - BASE, Inc. Constant Pool ldc return
4
None
getstatic
© - BASE, Inc. getstatic getstatic getstatic Constant Pool unsigned
short
© - BASE, Inc. getstatic getstatic <0xB > putstatic
© - BASE, Inc. getstatic
© - BASE, Inc. getstatic
© - BASE, Inc. getstatic
© - BASE, Inc. getstatic
© - BASE, Inc. getstatic
© - BASE, Inc. getstatic
© - BASE, Inc. getstatic
invokevirtual
© - BASE, Inc. invokevirtual invokevirtual Constant Pool
© - BASE, Inc. invokevirtual invokevirtual <0xB > invoke dynamic,
special, interface, static
© - BASE, Inc. invokevirtual invoke JVM invoke invokedynamic invokeinterface
© - BASE, Inc. invokevirtual
© - BASE, Inc. invokevirtual
© - BASE, Inc. invokevirtual
© - BASE, Inc. invokevirtual
© - BASE, Inc. invokevirtual
© - BASE, Inc. invokevirtual
© - BASE, Inc. invokevirtual void
ldc
© - BASE, Inc. ldc ldc Constant Pool UTF Integer,
short, byte Constant Pool unsigned byte
© - BASE, Inc. ldc ldc Long Double
© - BASE, Inc. ldc
© - BASE, Inc. ldc Constant Pool
© - BASE, Inc. ldc Constant Pool
© - BASE, Inc. ldc
return
© - BASE, Inc. return return void moniterenter return areturn,
ireturn, freturn, dreturn
Hello World
© - BASE, Inc. Hello World B NN MM NN
B NN MM B
© - BASE, Inc. Hello World B NN MM NN
B NN MM B getstatic
© - BASE, Inc. Hello World B NN MM NN
B NN MM B unsigned short
© - BASE, Inc. Hello World B NN MM NN
B NN MM B ldc
© - BASE, Inc. Hello World B NN MM NN
B NN MM B unsigned byte Hello World Constant Pool
© - BASE, Inc. Hello World B NN MM NN
B NN MM B invokevirtual
© - BASE, Inc. Hello World B NN MM NN
B NN MM B unsigned short Constant Pool
© - BASE, Inc. Hello World B NN MM NN
B NN MM B return
None
"java.lang.System"
© - BASE, Inc. "java.lang.System" Java java.lang.System PHP "java\lang\System" System
"out"
© - BASE, Inc. "java.lang.System" ;
"out"
© - BASE, Inc. "out" PHP JVM static
© - BASE, Inc. "out"
© - BASE, Inc. "out"
"println" "java.io.PrintStream"
© - BASE, Inc. "java.io.PrintStream"
Hello World
DEMO
THANK YOU FOR YOUR LISTENING