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annotate modules/bytearray.tp @ 331:61f5b794d939

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Breaking change: method call syntax now always uses the syntactic receiver as the actual receiver. This makes its behavior different from function call syntax, but solves some problems with methods being shadowed by local variables and the like.
author Michael Pavone <pavone@retrodev.com>
date Sat, 28 Mar 2015 14:21:04 -0700
parents 4c669942c30d
children ff7ea11b4b60
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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e823e104b845 Add initial work on bytearrays with support for allocating executable memory
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1 #{
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2 includeSystemHeader: "unistd.h"
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3 includeSystemHeader: "sys/mman.h"
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4
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5 fromOpaque:withSize <- :opaque :size{
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6 #{
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7 llProperty: bytes withType: uint32_t
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8 llProperty: buffer withType: (void ptr)
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9 llMessage: _init_buf withVars: {
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10 sz <- obj_int32 ptr
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11 opaque <- cpointer ptr
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12 } andCode: :opaque sz {
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13 bytes <- sz num
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14 buffer <- (opaque val)
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15 self
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16 }
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17
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18 llMessage: _buf_ptr withVars: {
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19 ptrret <- cpointer ptr
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20 } andCode: {
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21 ptrret <- make_object: (addr_of: cpointer_meta) NULL 0
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22 ptrret val!: buffer
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23 ptrret
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24 }
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26 llMessage: length withVars: {
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27 intret <- obj_int32 ptr
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28 } andCode: {
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29 intret <- make_object: (addr_of: obj_int32_meta) NULL 0
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30 intret num!: bytes
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31 intret
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32 }
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33
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34 llMessage: set withVars: {
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35 offset <- obj_int32 ptr
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36 newval <- obj_uint8 ptr
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37 } andCode: :offset newval {
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38 (buffer castTo: (uint8_t ptr)) set: (offset num) (newval num)
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39 self
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40 }
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41 llMessage: get withVars: {
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42 offset <- obj_int32 ptr
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43 ret <- obj_uint8 ptr
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44 } andCode: :offset {
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45 ret <- make_object: (addr_of: obj_uint8_meta) NULL 0
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46 ret num!: ((buffer castTo: (uint8_t ptr)) get: (offset num))
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47 ret
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48 }
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49
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50 llMessage: shrinkTo withVars: {
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51 newsize <- obj_int32 ptr
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52 } andCode: :newsize {
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53 if: (newsize num) < bytes {
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54 bytes <- newsize num
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55 }
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56 self
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57 }
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58
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59 llMessage: stringFrom:to withVars: {
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60 from <- obj_int32 ptr
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61 to <- obj_int32 ptr
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62 str <- string ptr
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63 } andCode: :from :to {
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64 //probably should do some UTF-8 validation at some point
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65 str <- make_object: (addr_of: string_meta) NULL 0
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66 str bytes!: (to num) - (from num)
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67 str len!: (str bytes)
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68 str data!: (GC_MALLOC_ATOMIC: (str bytes) + 1)
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69 memcpy: (str data) (buffer castTo: (uint8_t ptr)) + (from num) (str bytes)
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70 (str data) set: (str bytes) 0
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71 str
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72 }
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73
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74 string <- {
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75 stringFrom: 0 to: length
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76 }
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77
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78 findChar:from:else <- :char :start found :else {
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79 notfound <- true
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80 n <- length
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81 i <- start
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82 while: { notfound && i < n } do: {
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83 if: (get: i) = char {
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84 notfound <- false
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85 } else: {
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86 i <- i + 1
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87 }
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88 }
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89 if: notfound else else: {
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90 found: i
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91 }
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92 }
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93 } _init_buf: opaque size
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94 }
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95
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96 normal <- :size {
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97 helper <- #{
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98 llMessage: alloc withVars: {
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99 size <- obj_int32 ptr
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100 opaqueret <- cpointer ptr
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101 } andCode: :size {
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102 opaqueret <- make_object: (addr_of: cpointer_meta) NULL 0
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103 opaqueret val!: (GC_MALLOC_ATOMIC: (size num))
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104 opaqueret
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105 }
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106 }
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107 fromOpaque: (helper alloc: size) withSize: size
294
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108 }
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109
178
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110 executable <- :size {
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111 buf <- #{
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112 llProperty: bytes withType: uint32_t
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113 llProperty: buffer withType: (void ptr)
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114 llMessage: _init withVars: {
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115 sz <- obj_int32 ptr
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116 } andCode: :sz {
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117 bytes <- sz num
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118 buffer <- sbrk: bytes
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119 mprotect: buffer bytes (PROT_READ or PROT_WRITE or PROT_EXEC)
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120 self
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121 }
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122 llMessage: set withVars: {
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123 offset <- obj_int32 ptr
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124 newval <- obj_uint8 ptr
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125 } andCode: :offset newval {
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126 (buffer castTo: (uint8_t ptr)) set: (offset num) (newval num)
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127 self
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128 }
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129 llMessage: get withVars: {
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130 offset <- obj_int32 ptr
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131 ret <- obj_uint8 ptr
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132 } andCode: :offset {
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133 ret <- make_object: (addr_of: obj_uint8_meta) NULL 0
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134 ret num!: ((buffer castTo: (uint8_t ptr)) get: (offset num))
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135 ret
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136 }
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137 llMessage: run withVars: {
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138 fun <- uint64_t funptr
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139 funret <- obj_uint64 ptr
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140 } andCode: {
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141 funret <- make_object: (addr_of: obj_uint64_meta) NULL 0
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142 fun <- buffer
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143 funret num!: ( fun: )
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144 funret
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145 }
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146
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147 llMessage: runWithArg withVars: {
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148 fun <- uint64_t funptr: uint64_t
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149 funret <- obj_uint64 ptr
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150 arg <- obj_uint64 ptr
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151 } andCode: :arg {
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152 fun <- buffer
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153 funret <- make_object: (addr_of: obj_uint64_meta) NULL 0
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154 funret num!: ( fun: (arg num) )
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155 funret
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156 }
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157 }
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158 buf _init: size
178
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159 }
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160
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161 executableFromBytes <- :bytes {
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162 totalSize <- bytes fold: 0 with: :acc el {
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163 acc + (el length)
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164 }
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165 ba <- executable: totalSize
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166 bytes fold: 0 with: :idx el {
180
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167 el flattenTo: ba at: idx
178
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168 }
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169 ba
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170 }
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171 }