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annotate modules/bytearray.tp @ 347:ff7ea11b4b60

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Add length method to executable bytearrays
author Michael Pavone <pavone@retrodev.com>
date Fri, 10 Apr 2015 00:48:12 -0700
parents 4c669942c30d
children 06dceff348ea
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 }
347
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122 llMessage: length withVars: {
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123 intret <- obj_int32 ptr
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124 } andCode: {
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125 intret <- make_object: (addr_of: obj_int32_meta) NULL 0
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126 intret num!: bytes
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127 intret
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128 }
178
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129 llMessage: set withVars: {
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130 offset <- obj_int32 ptr
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131 newval <- obj_uint8 ptr
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132 } andCode: :offset newval {
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133 (buffer castTo: (uint8_t ptr)) set: (offset num) (newval num)
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134 self
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135 }
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136 llMessage: get withVars: {
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137 offset <- obj_int32 ptr
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138 ret <- obj_uint8 ptr
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139 } andCode: :offset {
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140 ret <- make_object: (addr_of: obj_uint8_meta) NULL 0
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141 ret num!: ((buffer castTo: (uint8_t ptr)) get: (offset num))
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142 ret
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143 }
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144 llMessage: run withVars: {
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145 fun <- uint64_t funptr
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146 funret <- obj_uint64 ptr
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147 } andCode: {
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148 funret <- make_object: (addr_of: obj_uint64_meta) NULL 0
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149 fun <- buffer
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150 funret num!: ( fun: )
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151 funret
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152 }
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153
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154 llMessage: runWithArg withVars: {
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155 fun <- uint64_t funptr: uint64_t
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156 funret <- obj_uint64 ptr
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157 arg <- obj_uint64 ptr
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158 } andCode: :arg {
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159 fun <- buffer
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160 funret <- make_object: (addr_of: obj_uint64_meta) NULL 0
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161 funret num!: ( fun: (arg num) )
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162 funret
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163 }
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164 }
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fb922651db29 Pass size parameter to _init in bytearray
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165 buf _init: size
178
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166 }
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167
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168 executableFromBytes <- :bytes {
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169 totalSize <- bytes fold: 0 with: :acc el {
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170 acc + (el length)
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171 }
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172 ba <- executable: totalSize
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173 bytes fold: 0 with: :idx el {
180
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174 el flattenTo: ba at: idx
178
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175 }
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176 ba
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177 }
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178 }