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

Transcript

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

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

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3. © - BASE, Inc.
   Who am I?
   

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4. View Slide

5. © - BASE, Inc.
   PHPerKaigi Builderscon
   

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6. © - BASE, Inc.
   php-java/php-java
   

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7. OSS
   

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8. View Slide

9. © - BASE, Inc.
   JVM
   PHP
   

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10. © - BASE, Inc.
    Hello World
    

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11. JVM
    

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12. JVM
    

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

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14. JVM
    

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15. exec('java HelloWorld')
    

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16. exec('java HelloWorld')
    

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17. © - BASE, Inc.
    JVM
    Java
    class
    class
    JVM
    

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

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19. © - BASE, Inc.
    JVM
    

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20. © - BASE, Inc.
    JVM
    Java class
    

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21. © - BASE, Inc.
    JVM
    

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22. © - BASE, Inc.
    JVM
    class
    

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23. JVM
    

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

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25. JVM
    

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

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27. JVM
    

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28. JVM,
    

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29. PHP
    

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30. View Slide

31. © - BASE, Inc.
    fopen /
    fread OK
    

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32. View Slide

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

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34. View Slide

35. PHP
    

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

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37. Java
    

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

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39. View Slide

40. PHP Java
    

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41. View Slide

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

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44. Hello World
    

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45. Java Virtual Machine Specification
    

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46. © - 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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47. ClassFile Structure
    

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48. © - BASE, Inc.
    ClassFile Structure
    

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49. © - BASE, Inc.
    ClassFile Structure
    

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

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51. Hello World
    

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

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53. Method Info
    

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54. © - BASE, Inc.
    Method Info
    

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55. © - BASE, Inc.
    Method Info
    

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56. Code Attribute
    

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57. View Slide

58. © - BASE, Inc.
    Code Attribute
    

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59. © - BASE, Inc.
    Code Attribute
    

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60. © - BASE, Inc.
    Code Attribute
    

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61. © - BASE, Inc.
    Code Attribute
    

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62. © - BASE, Inc.
    Code Attribute
    

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63. © - BASE, Inc.
    Code Attribute
    

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64. © - BASE, Inc.
    Code Attribute
    

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65. View Slide

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

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67. View Slide

68. View Slide

69. View Slide

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

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71. © - BASE, Inc.
    Constant Pool
    ldc
    return
    

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72. View Slide

73. View Slide

74. getstatic
    

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

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

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77. © - BASE, Inc.
    getstatic
    

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78. © - BASE, Inc.
    getstatic
    

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79. © - BASE, Inc.
    getstatic
    

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80. © - BASE, Inc.
    getstatic
    

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81. © - BASE, Inc.
    getstatic
    

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82. © - BASE, Inc.
    getstatic
    

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83. © - BASE, Inc.
    getstatic
    

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84. invokevirtual
    

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

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

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

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88. © - BASE, Inc.
    invokevirtual
    

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89. © - BASE, Inc.
    invokevirtual
    

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90. © - BASE, Inc.
    invokevirtual
    

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91. © - BASE, Inc.
    invokevirtual
    

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92. © - BASE, Inc.
    invokevirtual
    

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93. © - BASE, Inc.
    invokevirtual
    

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94. © - BASE, Inc.
    invokevirtual
    void
    

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95. ldc
    

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

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97. © - BASE, Inc.
    ldc
    ldc
    Long Double
    

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98. © - BASE, Inc.
    ldc
    

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99. © - BASE, Inc.
    ldc
    Constant Pool
    

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100. © - BASE, Inc.
     ldc
     Constant Pool
     

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101. © - BASE, Inc.
     ldc
     

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102. return
     

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

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104. Hello World
     

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

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

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

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

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

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

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

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

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113. View Slide

114. "java.lang.System"
     

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

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116. © - BASE, Inc.
     "java.lang.System"
     ;
     

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117. "out"
     

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118. © - BASE, Inc.
     "out"
     PHP JVM static
     

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119. © - BASE, Inc.
     "out"
     

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120. © - BASE, Inc.
     "out"
     

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121. "println"
     "java.io.PrintStream"
     

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122. © - BASE, Inc.
     "java.io.PrintStream"
     

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123. Hello World
     

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124. DEMO
     

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125. THANK YOU FOR YOUR LISTENING
     

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