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2 files changed, 308 insertions, 0 deletions

diff --git a/node_modules/@webassemblyjs/ast/lib/transform/denormalize-type-references/index.js b/node_modules/@webassemblyjs/ast/lib/transform/denormalize-type-references/index.js
new file mode 100644
index 00000000..3258f84d
--- /dev/null
+++ b/node_modules/@webassemblyjs/ast/lib/transform/denormalize-type-references/index.js
@@ -0,0 +1,83 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.transform = transform;
+
+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.
+
+
+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);
+    }
+  });
+}
\ No newline at end of file
diff --git a/node_modules/@webassemblyjs/ast/lib/transform/wast-identifier-to-index/index.js b/node_modules/@webassemblyjs/ast/lib/transform/wast-identifier-to-index/index.js
new file mode 100644
index 00000000..33130bf2
--- /dev/null
+++ b/node_modules/@webassemblyjs/ast/lib/transform/wast-identifier-to-index/index.js
@@ -0,0 +1,225 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.transform = transform;
+
+var _index = require("../../index");
+
+var _helperModuleContext = require("@webassemblyjs/helper-module-context");
+
+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"); } }
+
+// 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);
+}
+
+function transform(ast) {
+  var module;
+  (0, _index.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 = (0, _helperModuleContext.moduleContextFromModuleAST)(module); // Transform the actual instruction in function bodies
+
+  (0, _index.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 ((0, _index.isIdentifier)(index) === true) {
+        var offsetInModule = moduleContext.getFunctionOffsetByIdentifier(index.value);
+
+        if (typeof offsetInModule === "undefined") {
+          throw newUnexpectedFunction(index.value);
+        } // Replace the index Identifier
+        // $FlowIgnore: reference?
+
+
+        path.node.index = (0, _index.numberLiteralFromRaw)(offsetInModule);
+      }
+    })
+  });
+}
+
+function transformFuncPath(funcPath, moduleContext) {
+  var funcNode = funcPath.node;
+  var signature = funcNode.signature;
+
+  if (signature.type !== "Signature") {
+    throw new Error("Function signatures must be denormalised before execution");
+  }
+
+  var params = signature.params; // Add func locals in the context
+
+  params.forEach(function (p) {
+    return moduleContext.addLocal(p.valtype);
+  });
+  (0, _index.traverse)(funcNode, {
+    Instr: function (_Instr) {
+      function Instr(_x4) {
+        return _Instr.apply(this, arguments);
+      }
+
+      Instr.toString = function () {
+        return _Instr.toString();
+      };
+
+      return Instr;
+    }(function (instrPath) {
+      var instrNode = instrPath.node;
+      /**
+       * Local access
+       */
+
+      if (instrNode.id === "get_local" || instrNode.id === "set_local" || instrNode.id === "tee_local") {
+        var _instrNode$args = _slicedToArray(instrNode.args, 1),
+            firstArg = _instrNode$args[0];
+
+        if (firstArg.type === "Identifier") {
+          var offsetInParams = params.findIndex(function (_ref) {
+            var id = _ref.id;
+            return id === firstArg.value;
+          });
+
+          if (offsetInParams === -1) {
+            throw new Error("".concat(firstArg.value, " not found in ").concat(instrNode.id, ": not declared in func params"));
+          } // Replace the Identifer node by our new NumberLiteral node
+
+
+          instrNode.args[0] = (0, _index.numberLiteralFromRaw)(offsetInParams);
+        }
+      }
+      /**
+       * Global access
+       */
+
+
+      if (instrNode.id === "get_global" || instrNode.id === "set_global") {
+        var _instrNode$args2 = _slicedToArray(instrNode.args, 1),
+            _firstArg = _instrNode$args2[0];
+
+        if ((0, _index.isIdentifier)(_firstArg) === true) {
+          var globalOffset = moduleContext.getGlobalOffsetByIdentifier( // $FlowIgnore: reference?
+          _firstArg.value);
+
+          if (typeof globalOffset === "undefined") {
+            // $FlowIgnore: reference?
+            throw new Error("global ".concat(_firstArg.value, " not found in module"));
+          } // Replace the Identifer node by our new NumberLiteral node
+
+
+          instrNode.args[0] = (0, _index.numberLiteralFromRaw)(globalOffset);
+        }
+      }
+      /**
+       * Labels lookup
+       */
+
+
+      if (instrNode.id === "br") {
+        var _instrNode$args3 = _slicedToArray(instrNode.args, 1),
+            _firstArg2 = _instrNode$args3[0];
+
+        if ((0, _index.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 ((0, _index.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 ((0, _index.isFunc)(node)) {
+              return false;
+            }
+          }); // Replace the Identifer node by our new NumberLiteral node
+
+          instrNode.args[0] = (0, _index.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 ((0, _index.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 = (0, _index.numberLiteralFromRaw)(offsetInModule);
+      }
+    })
+  });
+}
\ No newline at end of file