1 | function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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2 |
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3 | function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
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4 |
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5 | function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
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6 |
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7 | // TODO(sven): add flow in here
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8 | import { isSignature, isNumberLiteral } from "../../nodes.js";
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9 | export function moduleContextFromModuleAST(m) {
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10 | var moduleContext = new ModuleContext();
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11 |
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12 | if (!(m.type === "Module")) {
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13 | throw new Error('m.type === "Module"' + " error: " + (undefined || "unknown"));
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14 | }
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15 |
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16 | m.fields.forEach(function (field) {
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17 | switch (field.type) {
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18 | case "Start":
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19 | {
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20 | moduleContext.setStart(field.index);
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21 | break;
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22 | }
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23 |
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24 | case "TypeInstruction":
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25 | {
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26 | moduleContext.addType(field);
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27 | break;
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28 | }
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29 |
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30 | case "Func":
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31 | {
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32 | moduleContext.addFunction(field);
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33 | break;
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34 | }
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35 |
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36 | case "Global":
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37 | {
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38 | moduleContext.defineGlobal(field);
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39 | break;
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40 | }
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41 |
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42 | case "ModuleImport":
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43 | {
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44 | switch (field.descr.type) {
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45 | case "GlobalType":
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46 | {
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47 | moduleContext.importGlobal(field.descr.valtype, field.descr.mutability);
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48 | break;
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49 | }
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50 |
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51 | case "Memory":
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52 | {
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53 | moduleContext.addMemory(field.descr.limits.min, field.descr.limits.max);
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54 | break;
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55 | }
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56 |
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57 | case "FuncImportDescr":
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58 | {
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59 | moduleContext.importFunction(field.descr);
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60 | break;
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61 | }
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62 |
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63 | case "Table":
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64 | {
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65 | // FIXME(sven): not implemented yet
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66 | break;
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67 | }
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68 |
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69 | default:
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70 | throw new Error("Unsupported ModuleImport of type " + JSON.stringify(field.descr.type));
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71 | }
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72 |
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73 | break;
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74 | }
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75 |
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76 | case "Memory":
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77 | {
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78 | moduleContext.addMemory(field.limits.min, field.limits.max);
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79 | break;
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80 | }
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81 | }
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82 | });
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83 | return moduleContext;
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84 | }
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85 | /**
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86 | * Module context for type checking
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87 | */
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88 |
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89 | export var ModuleContext =
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90 | /*#__PURE__*/
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91 | function () {
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92 | function ModuleContext() {
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93 | _classCallCheck(this, ModuleContext);
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94 |
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95 | this.funcs = [];
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96 | this.funcsOffsetByIdentifier = [];
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97 | this.types = [];
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98 | this.globals = [];
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99 | this.globalsOffsetByIdentifier = [];
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100 | this.mems = []; // Current stack frame
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101 |
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102 | this.locals = [];
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103 | this.labels = [];
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104 | this.return = [];
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105 | this.debugName = "unknown";
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106 | this.start = null;
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107 | }
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108 | /**
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109 | * Set start segment
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110 | */
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111 |
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112 |
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113 | _createClass(ModuleContext, [{
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114 | key: "setStart",
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115 | value: function setStart(index) {
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116 | this.start = index.value;
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117 | }
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118 | /**
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119 | * Get start function
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120 | */
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121 |
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122 | }, {
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123 | key: "getStart",
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124 | value: function getStart() {
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125 | return this.start;
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126 | }
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127 | /**
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128 | * Reset the active stack frame
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129 | */
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130 |
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131 | }, {
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132 | key: "newContext",
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133 | value: function newContext(debugName, expectedResult) {
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134 | this.locals = [];
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135 | this.labels = [expectedResult];
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136 | this.return = expectedResult;
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137 | this.debugName = debugName;
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138 | }
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139 | /**
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140 | * Functions
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141 | */
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142 |
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143 | }, {
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144 | key: "addFunction",
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145 | value: function addFunction(func
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146 | /*: Func*/
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147 | ) {
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148 | // eslint-disable-next-line prefer-const
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149 | var _ref = func.signature || {},
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150 | _ref$params = _ref.params,
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151 | args = _ref$params === void 0 ? [] : _ref$params,
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152 | _ref$results = _ref.results,
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153 | result = _ref$results === void 0 ? [] : _ref$results;
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154 |
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155 | args = args.map(function (arg) {
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156 | return arg.valtype;
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157 | });
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158 | this.funcs.push({
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159 | args: args,
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160 | result: result
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161 | });
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162 |
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163 | if (typeof func.name !== "undefined") {
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164 | this.funcsOffsetByIdentifier[func.name.value] = this.funcs.length - 1;
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165 | }
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166 | }
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167 | }, {
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168 | key: "importFunction",
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169 | value: function importFunction(funcimport) {
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170 | if (isSignature(funcimport.signature)) {
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171 | // eslint-disable-next-line prefer-const
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172 | var _funcimport$signature = funcimport.signature,
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173 | args = _funcimport$signature.params,
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174 | result = _funcimport$signature.results;
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175 | args = args.map(function (arg) {
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176 | return arg.valtype;
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177 | });
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178 | this.funcs.push({
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179 | args: args,
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180 | result: result
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181 | });
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182 | } else {
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183 | if (!isNumberLiteral(funcimport.signature)) {
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184 | throw new Error('isNumberLiteral(funcimport.signature)' + " error: " + (undefined || "unknown"));
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185 | }
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186 |
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187 | var typeId = funcimport.signature.value;
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188 |
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189 | if (!this.hasType(typeId)) {
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190 | throw new Error('this.hasType(typeId)' + " error: " + (undefined || "unknown"));
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191 | }
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192 |
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193 | var signature = this.getType(typeId);
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194 | this.funcs.push({
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195 | args: signature.params.map(function (arg) {
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196 | return arg.valtype;
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197 | }),
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198 | result: signature.results
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199 | });
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200 | }
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201 |
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202 | if (typeof funcimport.id !== "undefined") {
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203 | // imports are first, we can assume their index in the array
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204 | this.funcsOffsetByIdentifier[funcimport.id.value] = this.funcs.length - 1;
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205 | }
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206 | }
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207 | }, {
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208 | key: "hasFunction",
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209 | value: function hasFunction(index) {
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210 | return typeof this.getFunction(index) !== "undefined";
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211 | }
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212 | }, {
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213 | key: "getFunction",
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214 | value: function getFunction(index) {
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215 | if (typeof index !== "number") {
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216 | throw new Error("getFunction only supported for number index");
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217 | }
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218 |
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219 | return this.funcs[index];
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220 | }
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221 | }, {
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222 | key: "getFunctionOffsetByIdentifier",
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223 | value: function getFunctionOffsetByIdentifier(name) {
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224 | if (!(typeof name === "string")) {
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225 | throw new Error('typeof name === "string"' + " error: " + (undefined || "unknown"));
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226 | }
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227 |
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228 | return this.funcsOffsetByIdentifier[name];
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229 | }
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230 | /**
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231 | * Labels
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232 | */
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233 |
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234 | }, {
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235 | key: "addLabel",
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236 | value: function addLabel(result) {
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237 | this.labels.unshift(result);
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238 | }
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239 | }, {
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240 | key: "hasLabel",
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241 | value: function hasLabel(index) {
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242 | return this.labels.length > index && index >= 0;
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243 | }
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244 | }, {
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245 | key: "getLabel",
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246 | value: function getLabel(index) {
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247 | return this.labels[index];
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248 | }
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249 | }, {
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250 | key: "popLabel",
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251 | value: function popLabel() {
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252 | this.labels.shift();
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253 | }
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254 | /**
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255 | * Locals
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256 | */
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257 |
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258 | }, {
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259 | key: "hasLocal",
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260 | value: function hasLocal(index) {
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261 | return typeof this.getLocal(index) !== "undefined";
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262 | }
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263 | }, {
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264 | key: "getLocal",
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265 | value: function getLocal(index) {
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266 | return this.locals[index];
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267 | }
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268 | }, {
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269 | key: "addLocal",
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270 | value: function addLocal(type) {
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271 | this.locals.push(type);
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272 | }
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273 | /**
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274 | * Types
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275 | */
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276 |
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277 | }, {
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278 | key: "addType",
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279 | value: function addType(type) {
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280 | if (!(type.functype.type === "Signature")) {
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281 | throw new Error('type.functype.type === "Signature"' + " error: " + (undefined || "unknown"));
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282 | }
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283 |
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284 | this.types.push(type.functype);
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285 | }
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286 | }, {
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287 | key: "hasType",
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288 | value: function hasType(index) {
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289 | return this.types[index] !== undefined;
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290 | }
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291 | }, {
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292 | key: "getType",
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293 | value: function getType(index) {
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294 | return this.types[index];
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295 | }
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296 | /**
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297 | * Globals
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298 | */
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299 |
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300 | }, {
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301 | key: "hasGlobal",
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302 | value: function hasGlobal(index) {
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303 | return this.globals.length > index && index >= 0;
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304 | }
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305 | }, {
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306 | key: "getGlobal",
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307 | value: function getGlobal(index) {
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308 | return this.globals[index].type;
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309 | }
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310 | }, {
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311 | key: "getGlobalOffsetByIdentifier",
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312 | value: function getGlobalOffsetByIdentifier(name) {
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313 | if (!(typeof name === "string")) {
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314 | throw new Error('typeof name === "string"' + " error: " + (undefined || "unknown"));
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315 | }
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316 |
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317 | return this.globalsOffsetByIdentifier[name];
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318 | }
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319 | }, {
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320 | key: "defineGlobal",
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321 | value: function defineGlobal(global
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322 | /*: Global*/
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323 | ) {
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324 | var type = global.globalType.valtype;
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325 | var mutability = global.globalType.mutability;
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326 | this.globals.push({
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327 | type: type,
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328 | mutability: mutability
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329 | });
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330 |
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331 | if (typeof global.name !== "undefined") {
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332 | this.globalsOffsetByIdentifier[global.name.value] = this.globals.length - 1;
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333 | }
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334 | }
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335 | }, {
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336 | key: "importGlobal",
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337 | value: function importGlobal(type, mutability) {
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338 | this.globals.push({
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339 | type: type,
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340 | mutability: mutability
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341 | });
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342 | }
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343 | }, {
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344 | key: "isMutableGlobal",
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345 | value: function isMutableGlobal(index) {
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346 | return this.globals[index].mutability === "var";
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347 | }
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348 | }, {
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349 | key: "isImmutableGlobal",
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350 | value: function isImmutableGlobal(index) {
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351 | return this.globals[index].mutability === "const";
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352 | }
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353 | /**
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354 | * Memories
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355 | */
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356 |
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357 | }, {
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358 | key: "hasMemory",
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359 | value: function hasMemory(index) {
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360 | return this.mems.length > index && index >= 0;
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361 | }
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362 | }, {
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363 | key: "addMemory",
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364 | value: function addMemory(min, max) {
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365 | this.mems.push({
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366 | min: min,
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367 | max: max
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368 | });
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369 | }
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370 | }, {
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371 | key: "getMemory",
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372 | value: function getMemory(index) {
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373 | return this.mems[index];
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374 | }
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375 | }]);
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376 |
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377 | return ModuleContext;
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378 | }(); |
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