$

node_modules/@webassemblyjs/ast/esm/transform/ast-module-to-module-context/index.js

@@ -0,0 +1,378 @@
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+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); } }
+
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
+
+// TODO(sven): add flow in here
+import { isSignature, isNumberLiteral } from "../../nodes.js";
+export function moduleContextFromModuleAST(m) {
+  var moduleContext = new ModuleContext();
+
+  if (!(m.type === "Module")) {
+    throw new Error('m.type === "Module"' + " error: " + (undefined || "unknown"));
+  }
+
+  m.fields.forEach(function (field) {
+    switch (field.type) {
+      case "Start":
+        {
+          moduleContext.setStart(field.index);
+          break;
+        }
+
+      case "TypeInstruction":
+        {
+          moduleContext.addType(field);
+          break;
+        }
+
+      case "Func":
+        {
+          moduleContext.addFunction(field);
+          break;
+        }
+
+      case "Global":
+        {
+          moduleContext.defineGlobal(field);
+          break;
+        }
+
+      case "ModuleImport":
+        {
+          switch (field.descr.type) {
+            case "GlobalType":
+              {
+                moduleContext.importGlobal(field.descr.valtype, field.descr.mutability);
+                break;
+              }
+
+            case "Memory":
+              {
+                moduleContext.addMemory(field.descr.limits.min, field.descr.limits.max);
+                break;
+              }
+
+            case "FuncImportDescr":
+              {
+                moduleContext.importFunction(field.descr);
+                break;
+              }
+
+            case "Table":
+              {
+                // FIXME(sven): not implemented yet
+                break;
+              }
+
+            default:
+              throw new Error("Unsupported ModuleImport of type " + JSON.stringify(field.descr.type));
+          }
+
+          break;
+        }
+
+      case "Memory":
+        {
+          moduleContext.addMemory(field.limits.min, field.limits.max);
+          break;
+        }
+    }
+  });
+  return moduleContext;
+}
+/**
+ * Module context for type checking
+ */
+
+export var ModuleContext =
+/*#__PURE__*/
+function () {
+  function ModuleContext() {
+    _classCallCheck(this, ModuleContext);
+
+    this.funcs = [];
+    this.funcsOffsetByIdentifier = [];
+    this.types = [];
+    this.globals = [];
+    this.globalsOffsetByIdentifier = [];
+    this.mems = []; // Current stack frame
+
+    this.locals = [];
+    this.labels = [];
+    this.return = [];
+    this.debugName = "unknown";
+    this.start = null;
+  }
+  /**
+   * Set start segment
+   */
+
+
+  _createClass(ModuleContext, [{
+    key: "setStart",
+    value: function setStart(index) {
+      this.start = index.value;
+    }
+    /**
+     * Get start function
+     */
+
+  }, {
+    key: "getStart",
+    value: function getStart() {
+      return this.start;
+    }
+    /**
+     * Reset the active stack frame
+     */
+
+  }, {
+    key: "newContext",
+    value: function newContext(debugName, expectedResult) {
+      this.locals = [];
+      this.labels = [expectedResult];
+      this.return = expectedResult;
+      this.debugName = debugName;
+    }
+    /**
+     * Functions
+     */
+
+  }, {
+    key: "addFunction",
+    value: function addFunction(func
+    /*: Func*/
+    ) {
+      // eslint-disable-next-line prefer-const
+      var _ref = func.signature || {},
+          _ref$params = _ref.params,
+          args = _ref$params === void 0 ? [] : _ref$params,
+          _ref$results = _ref.results,
+          result = _ref$results === void 0 ? [] : _ref$results;
+
+      args = args.map(function (arg) {
+        return arg.valtype;
+      });
+      this.funcs.push({
+        args: args,
+        result: result
+      });
+
+      if (typeof func.name !== "undefined") {
+        this.funcsOffsetByIdentifier[func.name.value] = this.funcs.length - 1;
+      }
+    }
+  }, {
+    key: "importFunction",
+    value: function importFunction(funcimport) {
+      if (isSignature(funcimport.signature)) {
+        // eslint-disable-next-line prefer-const
+        var _funcimport$signature = funcimport.signature,
+            args = _funcimport$signature.params,
+            result = _funcimport$signature.results;
+        args = args.map(function (arg) {
+          return arg.valtype;
+        });
+        this.funcs.push({
+          args: args,
+          result: result
+        });
+      } else {
+        if (!isNumberLiteral(funcimport.signature)) {
+          throw new Error('isNumberLiteral(funcimport.signature)' + " error: " + (undefined || "unknown"));
+        }
+
+        var typeId = funcimport.signature.value;
+
+        if (!this.hasType(typeId)) {
+          throw new Error('this.hasType(typeId)' + " error: " + (undefined || "unknown"));
+        }
+
+        var signature = this.getType(typeId);
+        this.funcs.push({
+          args: signature.params.map(function (arg) {
+            return arg.valtype;
+          }),
+          result: signature.results
+        });
+      }
+
+      if (typeof funcimport.id !== "undefined") {
+        // imports are first, we can assume their index in the array
+        this.funcsOffsetByIdentifier[funcimport.id.value] = this.funcs.length - 1;
+      }
+    }
+  }, {
+    key: "hasFunction",
+    value: function hasFunction(index) {
+      return typeof this.getFunction(index) !== "undefined";
+    }
+  }, {
+    key: "getFunction",
+    value: function getFunction(index) {
+      if (typeof index !== "number") {
+        throw new Error("getFunction only supported for number index");
+      }
+
+      return this.funcs[index];
+    }
+  }, {
+    key: "getFunctionOffsetByIdentifier",
+    value: function getFunctionOffsetByIdentifier(name) {
+      if (!(typeof name === "string")) {
+        throw new Error('typeof name === "string"' + " error: " + (undefined || "unknown"));
+      }
+
+      return this.funcsOffsetByIdentifier[name];
+    }
+    /**
+     * Labels
+     */
+
+  }, {
+    key: "addLabel",
+    value: function addLabel(result) {
+      this.labels.unshift(result);
+    }
+  }, {
+    key: "hasLabel",
+    value: function hasLabel(index) {
+      return this.labels.length > index && index >= 0;
+    }
+  }, {
+    key: "getLabel",
+    value: function getLabel(index) {
+      return this.labels[index];
+    }
+  }, {
+    key: "popLabel",
+    value: function popLabel() {
+      this.labels.shift();
+    }
+    /**
+     * Locals
+     */
+
+  }, {
+    key: "hasLocal",
+    value: function hasLocal(index) {
+      return typeof this.getLocal(index) !== "undefined";
+    }
+  }, {
+    key: "getLocal",
+    value: function getLocal(index) {
+      return this.locals[index];
+    }
+  }, {
+    key: "addLocal",
+    value: function addLocal(type) {
+      this.locals.push(type);
+    }
+    /**
+     * Types
+     */
+
+  }, {
+    key: "addType",
+    value: function addType(type) {
+      if (!(type.functype.type === "Signature")) {
+        throw new Error('type.functype.type === "Signature"' + " error: " + (undefined || "unknown"));
+      }
+
+      this.types.push(type.functype);
+    }
+  }, {
+    key: "hasType",
+    value: function hasType(index) {
+      return this.types[index] !== undefined;
+    }
+  }, {
+    key: "getType",
+    value: function getType(index) {
+      return this.types[index];
+    }
+    /**
+     * Globals
+     */
+
+  }, {
+    key: "hasGlobal",
+    value: function hasGlobal(index) {
+      return this.globals.length > index && index >= 0;
+    }
+  }, {
+    key: "getGlobal",
+    value: function getGlobal(index) {
+      return this.globals[index].type;
+    }
+  }, {
+    key: "getGlobalOffsetByIdentifier",
+    value: function getGlobalOffsetByIdentifier(name) {
+      if (!(typeof name === "string")) {
+        throw new Error('typeof name === "string"' + " error: " + (undefined || "unknown"));
+      }
+
+      return this.globalsOffsetByIdentifier[name];
+    }
+  }, {
+    key: "defineGlobal",
+    value: function defineGlobal(global
+    /*: Global*/
+    ) {
+      var type = global.globalType.valtype;
+      var mutability = global.globalType.mutability;
+      this.globals.push({
+        type: type,
+        mutability: mutability
+      });
+
+      if (typeof global.name !== "undefined") {
+        this.globalsOffsetByIdentifier[global.name.value] = this.globals.length - 1;
+      }
+    }
+  }, {
+    key: "importGlobal",
+    value: function importGlobal(type, mutability) {
+      this.globals.push({
+        type: type,
+        mutability: mutability
+      });
+    }
+  }, {
+    key: "isMutableGlobal",
+    value: function isMutableGlobal(index) {
+      return this.globals[index].mutability === "var";
+    }
+  }, {
+    key: "isImmutableGlobal",
+    value: function isImmutableGlobal(index) {
+      return this.globals[index].mutability === "const";
+    }
+    /**
+     * Memories
+     */
+
+  }, {
+    key: "hasMemory",
+    value: function hasMemory(index) {
+      return this.mems.length > index && index >= 0;
+    }
+  }, {
+    key: "addMemory",
+    value: function addMemory(min, max) {
+      this.mems.push({
+        min: min,
+        max: max
+      });
+    }
+  }, {
+    key: "getMemory",
+    value: function getMemory(index) {
+      return this.mems[index];
+    }
+  }]);
+
+  return ModuleContext;
+}();

node_modules/@webassemblyjs/ast/esm/transform/denormalize-type-references/index.js

@@ -0,0 +1,76 @@
+var t = require("../../index"); // func and call_indirect instructions can either define a signature inline, or
+// reference a signature, e.g.
+//
+// ;; inline signature
+// (func (result i64)
+//   (i64.const 2)
+// )
+// ;; signature reference
+// (type (func (result i64)))
+// (func (type 0)
+//   (i64.const 2))
+// )
+//
+// this AST transform denormalises the type references, making all signatures within the module
+// inline.
+
+
+export function transform(ast) {
+  var typeInstructions = [];
+  t.traverse(ast, {
+    TypeInstruction: function TypeInstruction(_ref) {
+      var node = _ref.node;
+      typeInstructions.push(node);
+    }
+  });
+
+  if (!typeInstructions.length) {
+    return;
+  }
+
+  function denormalizeSignature(signature) {
+    // signature referenced by identifier
+    if (signature.type === "Identifier") {
+      var identifier = signature;
+      var typeInstruction = typeInstructions.find(function (t) {
+        return t.id.type === identifier.type && t.id.value === identifier.value;
+      });
+
+      if (!typeInstruction) {
+        throw new Error("A type instruction reference was not found ".concat(JSON.stringify(signature)));
+      }
+
+      return typeInstruction.functype;
+    } // signature referenced by index
+
+
+    if (signature.type === "NumberLiteral") {
+      var signatureRef = signature;
+      var _typeInstruction = typeInstructions[signatureRef.value];
+      return _typeInstruction.functype;
+    }
+
+    return signature;
+  }
+
+  t.traverse(ast, {
+    Func: function (_Func) {
+      function Func(_x) {
+        return _Func.apply(this, arguments);
+      }
+
+      Func.toString = function () {
+        return _Func.toString();
+      };
+
+      return Func;
+    }(function (_ref2) {
+      var node = _ref2.node;
+      node.signature = denormalizeSignature(node.signature);
+    }),
+    CallIndirectInstruction: function CallIndirectInstruction(_ref3) {
+      var node = _ref3.node;
+      node.signature = denormalizeSignature(node.signature);
+    }
+  });
+}

node_modules/@webassemblyjs/ast/esm/transform/wast-identifier-to-index/index.js

@@ -0,0 +1,216 @@
+function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
+
+function _sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
+
+function _slicedToArray(arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return _sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }
+
+import { isBlock, isFunc, isIdentifier, numberLiteralFromRaw, traverse } from "../../index";
+import { moduleContextFromModuleAST } from "../ast-module-to-module-context"; // FIXME(sven): do the same with all block instructions, must be more generic here
+
+function newUnexpectedFunction(i) {
+  return new Error("unknown function at offset: " + i);
+}
+
+export function transform(ast) {
+  var module;
+  traverse(ast, {
+    Module: function (_Module) {
+      function Module(_x) {
+        return _Module.apply(this, arguments);
+      }
+
+      Module.toString = function () {
+        return _Module.toString();
+      };
+
+      return Module;
+    }(function (path) {
+      module = path.node;
+    })
+  });
+  var moduleContext = moduleContextFromModuleAST(module); // Transform the actual instruction in function bodies
+
+  traverse(ast, {
+    Func: function (_Func) {
+      function Func(_x2) {
+        return _Func.apply(this, arguments);
+      }
+
+      Func.toString = function () {
+        return _Func.toString();
+      };
+
+      return Func;
+    }(function (path) {
+      transformFuncPath(path, moduleContext);
+    }),
+    Start: function (_Start) {
+      function Start(_x3) {
+        return _Start.apply(this, arguments);
+      }
+
+      Start.toString = function () {
+        return _Start.toString();
+      };
+
+      return Start;
+    }(function (path) {
+      var index = path.node.index;
+
+      if (isIdentifier(index) === true) {
+        var offsetInModule = moduleContext.getFunctionOffsetByIdentifier(index.value);
+
+        if (typeof offsetInModule === "undefined") {
+          throw newUnexpectedFunction(index.value);
+        } // Replace the index Identifier
+        // $FlowIgnore: reference?
+
+
+        path.node.index = numberLiteralFromRaw(offsetInModule);
+      }
+    })
+  });
+}
+
+function transformFuncPath(funcPath, moduleContext) {
+  var funcNode = funcPath.node;
+  var signature = funcNode.signature;
+
+  if (signature.type !== "Signature") {
+    throw new Error("Function signatures must be denormalised before execution");
+  }
+
+  var params = signature.params; // Add func locals in the context
+
+  params.forEach(function (p) {
+    return moduleContext.addLocal(p.valtype);
+  });
+  traverse(funcNode, {
+    Instr: function (_Instr) {
+      function Instr(_x4) {
+        return _Instr.apply(this, arguments);
+      }
+
+      Instr.toString = function () {
+        return _Instr.toString();
+      };
+
+      return Instr;
+    }(function (instrPath) {
+      var instrNode = instrPath.node;
+      /**
+       * Local access
+       */
+
+      if (instrNode.id === "get_local" || instrNode.id === "set_local" || instrNode.id === "tee_local") {
+        var _instrNode$args = _slicedToArray(instrNode.args, 1),
+            firstArg = _instrNode$args[0];
+
+        if (firstArg.type === "Identifier") {
+          var offsetInParams = params.findIndex(function (_ref) {
+            var id = _ref.id;
+            return id === firstArg.value;
+          });
+
+          if (offsetInParams === -1) {
+            throw new Error("".concat(firstArg.value, " not found in ").concat(instrNode.id, ": not declared in func params"));
+          } // Replace the Identifer node by our new NumberLiteral node
+
+
+          instrNode.args[0] = numberLiteralFromRaw(offsetInParams);
+        }
+      }
+      /**
+       * Global access
+       */
+
+
+      if (instrNode.id === "get_global" || instrNode.id === "set_global") {
+        var _instrNode$args2 = _slicedToArray(instrNode.args, 1),
+            _firstArg = _instrNode$args2[0];
+
+        if (isIdentifier(_firstArg) === true) {
+          var globalOffset = moduleContext.getGlobalOffsetByIdentifier( // $FlowIgnore: reference?
+          _firstArg.value);
+
+          if (typeof globalOffset === "undefined") {
+            // $FlowIgnore: reference?
+            throw new Error("global ".concat(_firstArg.value, " not found in module"));
+          } // Replace the Identifer node by our new NumberLiteral node
+
+
+          instrNode.args[0] = numberLiteralFromRaw(globalOffset);
+        }
+      }
+      /**
+       * Labels lookup
+       */
+
+
+      if (instrNode.id === "br") {
+        var _instrNode$args3 = _slicedToArray(instrNode.args, 1),
+            _firstArg2 = _instrNode$args3[0];
+
+        if (isIdentifier(_firstArg2) === true) {
+          // if the labels is not found it is going to be replaced with -1
+          // which is invalid.
+          var relativeBlockCount = -1; // $FlowIgnore: reference?
+
+          instrPath.findParent(function (_ref2) {
+            var node = _ref2.node;
+
+            if (isBlock(node)) {
+              relativeBlockCount++; // $FlowIgnore: reference?
+
+              var name = node.label || node.name;
+
+              if (_typeof(name) === "object") {
+                // $FlowIgnore: isIdentifier ensures that
+                if (name.value === _firstArg2.value) {
+                  // Found it
+                  return false;
+                }
+              }
+            }
+
+            if (isFunc(node)) {
+              return false;
+            }
+          }); // Replace the Identifer node by our new NumberLiteral node
+
+          instrNode.args[0] = numberLiteralFromRaw(relativeBlockCount);
+        }
+      }
+    }),
+
+    /**
+     * Func lookup
+     */
+    CallInstruction: function (_CallInstruction) {
+      function CallInstruction(_x5) {
+        return _CallInstruction.apply(this, arguments);
+      }
+
+      CallInstruction.toString = function () {
+        return _CallInstruction.toString();
+      };
+
+      return CallInstruction;
+    }(function (_ref3) {
+      var node = _ref3.node;
+      var index = node.index;
+
+      if (isIdentifier(index) === true) {
+        var offsetInModule = moduleContext.getFunctionOffsetByIdentifier(index.value);
+
+        if (typeof offsetInModule === "undefined") {
+          throw newUnexpectedFunction(index.value);
+        } // Replace the index Identifier
+        // $FlowIgnore: reference?
+
+
+        node.index = numberLiteralFromRaw(offsetInModule);
+      }
+    })
+  });
+}