306 lines
9.9 KiB
JavaScript
306 lines
9.9 KiB
JavaScript
|
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
|
||
|
|
|
||
|
|
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
|
||
|
|
|
||
|
|
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
|
||
|
|
|
||
|
|
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
|
||
|
|
|
||
|
|
function _iterableToArrayLimit(arr, i) { var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"]; if (_i == null) return; var _arr = []; var _n = true; var _d = false; var _s, _e; try { for (_i = _i.call(arr); !(_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 _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
|
||
|
|
|
||
|
|
import { encodeNode } from "@webassemblyjs/wasm-gen";
|
||
|
|
import { encodeU32 } from "@webassemblyjs/wasm-gen/lib/encoder";
|
||
|
|
import { isFunc, isGlobal, assertHasLoc, orderedInsertNode, getSectionMetadata, traverse, getEndOfSection } from "@webassemblyjs/ast";
|
||
|
|
import { resizeSectionByteSize, resizeSectionVecSize, createEmptySection, removeSections } from "@webassemblyjs/helper-wasm-section";
|
||
|
|
import { overrideBytesInBuffer } from "@webassemblyjs/helper-buffer";
|
||
|
|
import { getSectionForNode } from "@webassemblyjs/helper-wasm-bytecode";
|
||
|
|
|
||
|
|
function shiftLocNodeByDelta(node, delta) {
|
||
|
|
assertHasLoc(node); // $FlowIgnore: assertHasLoc ensures that
|
||
|
|
|
||
|
|
node.loc.start.column += delta; // $FlowIgnore: assertHasLoc ensures that
|
||
|
|
|
||
|
|
node.loc.end.column += delta;
|
||
|
|
}
|
||
|
|
|
||
|
|
function applyUpdate(ast, uint8Buffer, _ref) {
|
||
|
|
var _ref2 = _slicedToArray(_ref, 2),
|
||
|
|
oldNode = _ref2[0],
|
||
|
|
newNode = _ref2[1];
|
||
|
|
|
||
|
|
var deltaElements = 0;
|
||
|
|
assertHasLoc(oldNode);
|
||
|
|
var sectionName = getSectionForNode(newNode);
|
||
|
|
var replacementByteArray = encodeNode(newNode);
|
||
|
|
/**
|
||
|
|
* Replace new node as bytes
|
||
|
|
*/
|
||
|
|
|
||
|
|
uint8Buffer = overrideBytesInBuffer(uint8Buffer, // $FlowIgnore: assertHasLoc ensures that
|
||
|
|
oldNode.loc.start.column, // $FlowIgnore: assertHasLoc ensures that
|
||
|
|
oldNode.loc.end.column, replacementByteArray);
|
||
|
|
/**
|
||
|
|
* Update function body size if needed
|
||
|
|
*/
|
||
|
|
|
||
|
|
if (sectionName === "code") {
|
||
|
|
// Find the parent func
|
||
|
|
traverse(ast, {
|
||
|
|
Func: function Func(_ref3) {
|
||
|
|
var node = _ref3.node;
|
||
|
|
var funcHasThisIntr = node.body.find(function (n) {
|
||
|
|
return n === newNode;
|
||
|
|
}) !== undefined; // Update func's body size if needed
|
||
|
|
|
||
|
|
if (funcHasThisIntr === true) {
|
||
|
|
// These are the old functions locations informations
|
||
|
|
assertHasLoc(node);
|
||
|
|
var oldNodeSize = encodeNode(oldNode).length;
|
||
|
|
var bodySizeDeltaBytes = replacementByteArray.length - oldNodeSize;
|
||
|
|
|
||
|
|
if (bodySizeDeltaBytes !== 0) {
|
||
|
|
var newValue = node.metadata.bodySize + bodySizeDeltaBytes;
|
||
|
|
var newByteArray = encodeU32(newValue); // function body size byte
|
||
|
|
// FIXME(sven): only handles one byte u32
|
||
|
|
|
||
|
|
var start = node.loc.start.column;
|
||
|
|
var end = start + 1;
|
||
|
|
uint8Buffer = overrideBytesInBuffer(uint8Buffer, start, end, newByteArray);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Update section size
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
var deltaBytes = replacementByteArray.length - (oldNode.loc.end.column - oldNode.loc.start.column); // Init location informations
|
||
|
|
|
||
|
|
newNode.loc = {
|
||
|
|
start: {
|
||
|
|
line: -1,
|
||
|
|
column: -1
|
||
|
|
},
|
||
|
|
end: {
|
||
|
|
line: -1,
|
||
|
|
column: -1
|
||
|
|
}
|
||
|
|
}; // Update new node end position
|
||
|
|
// $FlowIgnore: assertHasLoc ensures that
|
||
|
|
|
||
|
|
newNode.loc.start.column = oldNode.loc.start.column; // $FlowIgnore: assertHasLoc ensures that
|
||
|
|
|
||
|
|
newNode.loc.end.column = // $FlowIgnore: assertHasLoc ensures that
|
||
|
|
oldNode.loc.start.column + replacementByteArray.length;
|
||
|
|
return {
|
||
|
|
uint8Buffer: uint8Buffer,
|
||
|
|
deltaBytes: deltaBytes,
|
||
|
|
deltaElements: deltaElements
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
function applyDelete(ast, uint8Buffer, node) {
|
||
|
|
var deltaElements = -1; // since we removed an element
|
||
|
|
|
||
|
|
assertHasLoc(node);
|
||
|
|
var sectionName = getSectionForNode(node);
|
||
|
|
|
||
|
|
if (sectionName === "start") {
|
||
|
|
var sectionMetadata = getSectionMetadata(ast, "start");
|
||
|
|
/**
|
||
|
|
* The start section only contains one element,
|
||
|
|
* we need to remove the whole section
|
||
|
|
*/
|
||
|
|
|
||
|
|
uint8Buffer = removeSections(ast, uint8Buffer, "start");
|
||
|
|
|
||
|
|
var _deltaBytes = -(sectionMetadata.size.value + 1);
|
||
|
|
/* section id */
|
||
|
|
|
||
|
|
|
||
|
|
return {
|
||
|
|
uint8Buffer: uint8Buffer,
|
||
|
|
deltaBytes: _deltaBytes,
|
||
|
|
deltaElements: deltaElements
|
||
|
|
};
|
||
|
|
} // replacement is nothing
|
||
|
|
|
||
|
|
|
||
|
|
var replacement = [];
|
||
|
|
uint8Buffer = overrideBytesInBuffer(uint8Buffer, // $FlowIgnore: assertHasLoc ensures that
|
||
|
|
node.loc.start.column, // $FlowIgnore: assertHasLoc ensures that
|
||
|
|
node.loc.end.column, replacement);
|
||
|
|
/**
|
||
|
|
* Update section
|
||
|
|
*/
|
||
|
|
// $FlowIgnore: assertHasLoc ensures that
|
||
|
|
|
||
|
|
var deltaBytes = -(node.loc.end.column - node.loc.start.column);
|
||
|
|
return {
|
||
|
|
uint8Buffer: uint8Buffer,
|
||
|
|
deltaBytes: deltaBytes,
|
||
|
|
deltaElements: deltaElements
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
function applyAdd(ast, uint8Buffer, node) {
|
||
|
|
var deltaElements = +1; // since we added an element
|
||
|
|
|
||
|
|
var sectionName = getSectionForNode(node);
|
||
|
|
var sectionMetadata = getSectionMetadata(ast, sectionName); // Section doesn't exists, we create an empty one
|
||
|
|
|
||
|
|
if (typeof sectionMetadata === "undefined") {
|
||
|
|
var res = createEmptySection(ast, uint8Buffer, sectionName);
|
||
|
|
uint8Buffer = res.uint8Buffer;
|
||
|
|
sectionMetadata = res.sectionMetadata;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* check that the expressions were ended
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
if (isFunc(node)) {
|
||
|
|
// $FlowIgnore
|
||
|
|
var body = node.body;
|
||
|
|
|
||
|
|
if (body.length === 0 || body[body.length - 1].id !== "end") {
|
||
|
|
throw new Error("expressions must be ended");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isGlobal(node)) {
|
||
|
|
// $FlowIgnore
|
||
|
|
var body = node.init;
|
||
|
|
|
||
|
|
if (body.length === 0 || body[body.length - 1].id !== "end") {
|
||
|
|
throw new Error("expressions must be ended");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Add nodes
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
var newByteArray = encodeNode(node); // The size of the section doesn't include the storage of the size itself
|
||
|
|
// we need to manually add it here
|
||
|
|
|
||
|
|
var start = getEndOfSection(sectionMetadata);
|
||
|
|
var end = start;
|
||
|
|
/**
|
||
|
|
* Update section
|
||
|
|
*/
|
||
|
|
|
||
|
|
var deltaBytes = newByteArray.length;
|
||
|
|
uint8Buffer = overrideBytesInBuffer(uint8Buffer, start, end, newByteArray);
|
||
|
|
node.loc = {
|
||
|
|
start: {
|
||
|
|
line: -1,
|
||
|
|
column: start
|
||
|
|
},
|
||
|
|
end: {
|
||
|
|
line: -1,
|
||
|
|
column: start + deltaBytes
|
||
|
|
}
|
||
|
|
}; // for func add the additional metadata in the AST
|
||
|
|
|
||
|
|
if (node.type === "Func") {
|
||
|
|
// the size is the first byte
|
||
|
|
// FIXME(sven): handle LEB128 correctly here
|
||
|
|
var bodySize = newByteArray[0];
|
||
|
|
node.metadata = {
|
||
|
|
bodySize: bodySize
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
if (node.type !== "IndexInFuncSection") {
|
||
|
|
orderedInsertNode(ast.body[0], node);
|
||
|
|
}
|
||
|
|
|
||
|
|
return {
|
||
|
|
uint8Buffer: uint8Buffer,
|
||
|
|
deltaBytes: deltaBytes,
|
||
|
|
deltaElements: deltaElements
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
export function applyOperations(ast, uint8Buffer, ops) {
|
||
|
|
ops.forEach(function (op) {
|
||
|
|
var state;
|
||
|
|
var sectionName;
|
||
|
|
|
||
|
|
switch (op.kind) {
|
||
|
|
case "update":
|
||
|
|
state = applyUpdate(ast, uint8Buffer, [op.oldNode, op.node]);
|
||
|
|
sectionName = getSectionForNode(op.node);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case "delete":
|
||
|
|
state = applyDelete(ast, uint8Buffer, op.node);
|
||
|
|
sectionName = getSectionForNode(op.node);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case "add":
|
||
|
|
state = applyAdd(ast, uint8Buffer, op.node);
|
||
|
|
sectionName = getSectionForNode(op.node);
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
throw new Error("Unknown operation");
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Resize section vec size.
|
||
|
|
* If the length of the LEB-encoded size changes, this can change
|
||
|
|
* the byte length of the section and the offset for nodes in the
|
||
|
|
* section. So we do this first before resizing section byte size
|
||
|
|
* or shifting following operations' nodes.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
if (state.deltaElements !== 0 && sectionName !== "start") {
|
||
|
|
var oldBufferLength = state.uint8Buffer.length;
|
||
|
|
state.uint8Buffer = resizeSectionVecSize(ast, state.uint8Buffer, sectionName, state.deltaElements); // Infer bytes added/removed by comparing buffer lengths
|
||
|
|
|
||
|
|
state.deltaBytes += state.uint8Buffer.length - oldBufferLength;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Resize section byte size.
|
||
|
|
* If the length of the LEB-encoded size changes, this can change
|
||
|
|
* the offset for nodes in the section. So we do this before
|
||
|
|
* shifting following operations' nodes.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
if (state.deltaBytes !== 0 && sectionName !== "start") {
|
||
|
|
var _oldBufferLength = state.uint8Buffer.length;
|
||
|
|
state.uint8Buffer = resizeSectionByteSize(ast, state.uint8Buffer, sectionName, state.deltaBytes); // Infer bytes added/removed by comparing buffer lengths
|
||
|
|
|
||
|
|
state.deltaBytes += state.uint8Buffer.length - _oldBufferLength;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Shift following operation's nodes
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
if (state.deltaBytes !== 0) {
|
||
|
|
ops.forEach(function (op) {
|
||
|
|
// We don't need to handle add ops, they are positioning independent
|
||
|
|
switch (op.kind) {
|
||
|
|
case "update":
|
||
|
|
shiftLocNodeByDelta(op.oldNode, state.deltaBytes);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case "delete":
|
||
|
|
shiftLocNodeByDelta(op.node, state.deltaBytes);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
uint8Buffer = state.uint8Buffer;
|
||
|
|
});
|
||
|
|
return uint8Buffer;
|
||
|
|
}
|