source: trip-planner-front/node_modules/@webassemblyjs/wasm-parser/lib/decoder.js@ 1ad8e64

Last change on this file since 1ad8e64 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit
  • Property mode set to 100644
File size: 53.3 KB
RevLine 
[6a3a178]1"use strict";
2
3Object.defineProperty(exports, "__esModule", {
4 value: true
5});
6exports.decode = decode;
7
8var _helperApiError = require("@webassemblyjs/helper-api-error");
9
10var ieee754 = _interopRequireWildcard(require("@webassemblyjs/ieee754"));
11
12var utf8 = _interopRequireWildcard(require("@webassemblyjs/utf8"));
13
14var t = _interopRequireWildcard(require("@webassemblyjs/ast"));
15
16var _leb = require("@webassemblyjs/leb128");
17
18var _helperWasmBytecode = _interopRequireDefault(require("@webassemblyjs/helper-wasm-bytecode"));
19
20function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
21
22function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
23
24function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
25
26function toHex(n) {
27 return "0x" + Number(n).toString(16);
28}
29
30function byteArrayEq(l, r) {
31 if (l.length !== r.length) {
32 return false;
33 }
34
35 for (var i = 0; i < l.length; i++) {
36 if (l[i] !== r[i]) {
37 return false;
38 }
39 }
40
41 return true;
42}
43
44function decode(ab, opts) {
45 var buf = new Uint8Array(ab);
46 var getUniqueName = t.getUniqueNameGenerator();
47 var offset = 0;
48
49 function getPosition() {
50 return {
51 line: -1,
52 column: offset
53 };
54 }
55
56 function dump(b, msg) {
57 if (opts.dump === false) return;
58 var pad = "\t\t\t\t\t\t\t\t\t\t";
59 var str = "";
60
61 if (b.length < 5) {
62 str = b.map(toHex).join(" ");
63 } else {
64 str = "...";
65 }
66
67 console.log(toHex(offset) + ":\t", str, pad, ";", msg);
68 }
69
70 function dumpSep(msg) {
71 if (opts.dump === false) return;
72 console.log(";", msg);
73 }
74 /**
75 * TODO(sven): we can atually use a same structure
76 * we are adding incrementally new features
77 */
78
79
80 var state = {
81 elementsInFuncSection: [],
82 elementsInExportSection: [],
83 elementsInCodeSection: [],
84
85 /**
86 * Decode memory from:
87 * - Memory section
88 */
89 memoriesInModule: [],
90
91 /**
92 * Decoded types from:
93 * - Type section
94 */
95 typesInModule: [],
96
97 /**
98 * Decoded functions from:
99 * - Function section
100 * - Import section
101 */
102 functionsInModule: [],
103
104 /**
105 * Decoded tables from:
106 * - Table section
107 */
108 tablesInModule: [],
109
110 /**
111 * Decoded globals from:
112 * - Global section
113 */
114 globalsInModule: []
115 };
116
117 function isEOF() {
118 return offset >= buf.length;
119 }
120
121 function eatBytes(n) {
122 offset = offset + n;
123 }
124
125 function readBytesAtOffset(_offset, numberOfBytes) {
126 var arr = [];
127
128 for (var i = 0; i < numberOfBytes; i++) {
129 arr.push(buf[_offset + i]);
130 }
131
132 return arr;
133 }
134
135 function readBytes(numberOfBytes) {
136 return readBytesAtOffset(offset, numberOfBytes);
137 }
138
139 function readF64() {
140 var bytes = readBytes(ieee754.NUMBER_OF_BYTE_F64);
141 var value = ieee754.decodeF64(bytes);
142
143 if (Math.sign(value) * value === Infinity) {
144 return {
145 value: Math.sign(value),
146 inf: true,
147 nextIndex: ieee754.NUMBER_OF_BYTE_F64
148 };
149 }
150
151 if (isNaN(value)) {
152 var sign = bytes[bytes.length - 1] >> 7 ? -1 : 1;
153 var mantissa = 0;
154
155 for (var i = 0; i < bytes.length - 2; ++i) {
156 mantissa += bytes[i] * Math.pow(256, i);
157 }
158
159 mantissa += bytes[bytes.length - 2] % 16 * Math.pow(256, bytes.length - 2);
160 return {
161 value: sign * mantissa,
162 nan: true,
163 nextIndex: ieee754.NUMBER_OF_BYTE_F64
164 };
165 }
166
167 return {
168 value: value,
169 nextIndex: ieee754.NUMBER_OF_BYTE_F64
170 };
171 }
172
173 function readF32() {
174 var bytes = readBytes(ieee754.NUMBER_OF_BYTE_F32);
175 var value = ieee754.decodeF32(bytes);
176
177 if (Math.sign(value) * value === Infinity) {
178 return {
179 value: Math.sign(value),
180 inf: true,
181 nextIndex: ieee754.NUMBER_OF_BYTE_F32
182 };
183 }
184
185 if (isNaN(value)) {
186 var sign = bytes[bytes.length - 1] >> 7 ? -1 : 1;
187 var mantissa = 0;
188
189 for (var i = 0; i < bytes.length - 2; ++i) {
190 mantissa += bytes[i] * Math.pow(256, i);
191 }
192
193 mantissa += bytes[bytes.length - 2] % 128 * Math.pow(256, bytes.length - 2);
194 return {
195 value: sign * mantissa,
196 nan: true,
197 nextIndex: ieee754.NUMBER_OF_BYTE_F32
198 };
199 }
200
201 return {
202 value: value,
203 nextIndex: ieee754.NUMBER_OF_BYTE_F32
204 };
205 }
206
207 function readUTF8String() {
208 var lenu32 = readU32(); // Don't eat any bytes. Instead, peek ahead of the current offset using
209 // readBytesAtOffset below. This keeps readUTF8String neutral with respect
210 // to the current offset, just like the other readX functions.
211
212 var strlen = lenu32.value;
213 dump([strlen], "string length");
214 var bytes = readBytesAtOffset(offset + lenu32.nextIndex, strlen);
215 var value = utf8.decode(bytes);
216 return {
217 value: value,
218 nextIndex: strlen + lenu32.nextIndex
219 };
220 }
221 /**
222 * Decode an unsigned 32bits integer
223 *
224 * The length will be handled by the leb librairy, we pass the max number of
225 * byte.
226 */
227
228
229 function readU32() {
230 var bytes = readBytes(_leb.MAX_NUMBER_OF_BYTE_U32);
231 var buffer = Buffer.from(bytes);
232 return (0, _leb.decodeUInt32)(buffer);
233 }
234
235 function readVaruint32() {
236 // where 32 bits = max 4 bytes
237 var bytes = readBytes(4);
238 var buffer = Buffer.from(bytes);
239 return (0, _leb.decodeUInt32)(buffer);
240 }
241
242 function readVaruint7() {
243 // where 7 bits = max 1 bytes
244 var bytes = readBytes(1);
245 var buffer = Buffer.from(bytes);
246 return (0, _leb.decodeUInt32)(buffer);
247 }
248 /**
249 * Decode a signed 32bits interger
250 */
251
252
253 function read32() {
254 var bytes = readBytes(_leb.MAX_NUMBER_OF_BYTE_U32);
255 var buffer = Buffer.from(bytes);
256 return (0, _leb.decodeInt32)(buffer);
257 }
258 /**
259 * Decode a signed 64bits integer
260 */
261
262
263 function read64() {
264 var bytes = readBytes(_leb.MAX_NUMBER_OF_BYTE_U64);
265 var buffer = Buffer.from(bytes);
266 return (0, _leb.decodeInt64)(buffer);
267 }
268
269 function readU64() {
270 var bytes = readBytes(_leb.MAX_NUMBER_OF_BYTE_U64);
271 var buffer = Buffer.from(bytes);
272 return (0, _leb.decodeUInt64)(buffer);
273 }
274
275 function readByte() {
276 return readBytes(1)[0];
277 }
278
279 function parseModuleHeader() {
280 if (isEOF() === true || offset + 4 > buf.length) {
281 throw new Error("unexpected end");
282 }
283
284 var header = readBytes(4);
285
286 if (byteArrayEq(_helperWasmBytecode.default.magicModuleHeader, header) === false) {
287 throw new _helperApiError.CompileError("magic header not detected");
288 }
289
290 dump(header, "wasm magic header");
291 eatBytes(4);
292 }
293
294 function parseVersion() {
295 if (isEOF() === true || offset + 4 > buf.length) {
296 throw new Error("unexpected end");
297 }
298
299 var version = readBytes(4);
300
301 if (byteArrayEq(_helperWasmBytecode.default.moduleVersion, version) === false) {
302 throw new _helperApiError.CompileError("unknown binary version");
303 }
304
305 dump(version, "wasm version");
306 eatBytes(4);
307 }
308
309 function parseVec(cast) {
310 var u32 = readU32();
311 var length = u32.value;
312 eatBytes(u32.nextIndex);
313 dump([length], "number");
314
315 if (length === 0) {
316 return [];
317 }
318
319 var elements = [];
320
321 for (var i = 0; i < length; i++) {
322 var byte = readByte();
323 eatBytes(1);
324 var value = cast(byte);
325 dump([byte], value);
326
327 if (typeof value === "undefined") {
328 throw new _helperApiError.CompileError("Internal failure: parseVec could not cast the value");
329 }
330
331 elements.push(value);
332 }
333
334 return elements;
335 } // Type section
336 // https://webassembly.github.io/spec/binary/modules.html#binary-typesec
337
338
339 function parseTypeSection(numberOfTypes) {
340 var typeInstructionNodes = [];
341 dump([numberOfTypes], "num types");
342
343 for (var i = 0; i < numberOfTypes; i++) {
344 var _startLoc = getPosition();
345
346 dumpSep("type " + i);
347 var type = readByte();
348 eatBytes(1);
349
350 if (type == _helperWasmBytecode.default.types.func) {
351 dump([type], "func");
352 var paramValtypes = parseVec(function (b) {
353 return _helperWasmBytecode.default.valtypes[b];
354 });
355 var params = paramValtypes.map(function (v) {
356 return t.funcParam(
357 /*valtype*/
358 v);
359 });
360 var result = parseVec(function (b) {
361 return _helperWasmBytecode.default.valtypes[b];
362 });
363 typeInstructionNodes.push(function () {
364 var endLoc = getPosition();
365 return t.withLoc(t.typeInstruction(undefined, t.signature(params, result)), endLoc, _startLoc);
366 }());
367 state.typesInModule.push({
368 params: params,
369 result: result
370 });
371 } else {
372 throw new Error("Unsupported type: " + toHex(type));
373 }
374 }
375
376 return typeInstructionNodes;
377 } // Import section
378 // https://webassembly.github.io/spec/binary/modules.html#binary-importsec
379
380
381 function parseImportSection(numberOfImports) {
382 var imports = [];
383
384 for (var i = 0; i < numberOfImports; i++) {
385 dumpSep("import header " + i);
386
387 var _startLoc2 = getPosition();
388 /**
389 * Module name
390 */
391
392
393 var moduleName = readUTF8String();
394 eatBytes(moduleName.nextIndex);
395 dump([], "module name (".concat(moduleName.value, ")"));
396 /**
397 * Name
398 */
399
400 var name = readUTF8String();
401 eatBytes(name.nextIndex);
402 dump([], "name (".concat(name.value, ")"));
403 /**
404 * Import descr
405 */
406
407 var descrTypeByte = readByte();
408 eatBytes(1);
409 var descrType = _helperWasmBytecode.default.importTypes[descrTypeByte];
410 dump([descrTypeByte], "import kind");
411
412 if (typeof descrType === "undefined") {
413 throw new _helperApiError.CompileError("Unknown import description type: " + toHex(descrTypeByte));
414 }
415
416 var importDescr = void 0;
417
418 if (descrType === "func") {
419 var indexU32 = readU32();
420 var typeindex = indexU32.value;
421 eatBytes(indexU32.nextIndex);
422 dump([typeindex], "type index");
423 var signature = state.typesInModule[typeindex];
424
425 if (typeof signature === "undefined") {
426 throw new _helperApiError.CompileError("function signature not found (".concat(typeindex, ")"));
427 }
428
429 var id = getUniqueName("func");
430 importDescr = t.funcImportDescr(id, t.signature(signature.params, signature.result));
431 state.functionsInModule.push({
432 id: t.identifier(name.value),
433 signature: signature,
434 isExternal: true
435 });
436 } else if (descrType === "global") {
437 importDescr = parseGlobalType();
438 var globalNode = t.global(importDescr, []);
439 state.globalsInModule.push(globalNode);
440 } else if (descrType === "table") {
441 importDescr = parseTableType(i);
442 } else if (descrType === "mem") {
443 var memoryNode = parseMemoryType(0);
444 state.memoriesInModule.push(memoryNode);
445 importDescr = memoryNode;
446 } else {
447 throw new _helperApiError.CompileError("Unsupported import of type: " + descrType);
448 }
449
450 imports.push(function () {
451 var endLoc = getPosition();
452 return t.withLoc(t.moduleImport(moduleName.value, name.value, importDescr), endLoc, _startLoc2);
453 }());
454 }
455
456 return imports;
457 } // Function section
458 // https://webassembly.github.io/spec/binary/modules.html#function-section
459
460
461 function parseFuncSection(numberOfFunctions) {
462 dump([numberOfFunctions], "num funcs");
463
464 for (var i = 0; i < numberOfFunctions; i++) {
465 var indexU32 = readU32();
466 var typeindex = indexU32.value;
467 eatBytes(indexU32.nextIndex);
468 dump([typeindex], "type index");
469 var signature = state.typesInModule[typeindex];
470
471 if (typeof signature === "undefined") {
472 throw new _helperApiError.CompileError("function signature not found (".concat(typeindex, ")"));
473 } // preserve anonymous, a name might be resolved later
474
475
476 var id = t.withRaw(t.identifier(getUniqueName("func")), "");
477 state.functionsInModule.push({
478 id: id,
479 signature: signature,
480 isExternal: false
481 });
482 }
483 } // Export section
484 // https://webassembly.github.io/spec/binary/modules.html#export-section
485
486
487 function parseExportSection(numberOfExport) {
488 dump([numberOfExport], "num exports"); // Parse vector of exports
489
490 for (var i = 0; i < numberOfExport; i++) {
491 var _startLoc3 = getPosition();
492 /**
493 * Name
494 */
495
496
497 var name = readUTF8String();
498 eatBytes(name.nextIndex);
499 dump([], "export name (".concat(name.value, ")"));
500 /**
501 * exportdescr
502 */
503
504 var typeIndex = readByte();
505 eatBytes(1);
506 dump([typeIndex], "export kind");
507 var indexu32 = readU32();
508 var index = indexu32.value;
509 eatBytes(indexu32.nextIndex);
510 dump([index], "export index");
511 var id = void 0,
512 signature = void 0;
513
514 if (_helperWasmBytecode.default.exportTypes[typeIndex] === "Func") {
515 var func = state.functionsInModule[index];
516
517 if (typeof func === "undefined") {
518 throw new _helperApiError.CompileError("unknown function (".concat(index, ")"));
519 }
520
521 id = t.numberLiteralFromRaw(index, String(index));
522 signature = func.signature;
523 } else if (_helperWasmBytecode.default.exportTypes[typeIndex] === "Table") {
524 var table = state.tablesInModule[index];
525
526 if (typeof table === "undefined") {
527 throw new _helperApiError.CompileError("unknown table ".concat(index));
528 }
529
530 id = t.numberLiteralFromRaw(index, String(index));
531 signature = null;
532 } else if (_helperWasmBytecode.default.exportTypes[typeIndex] === "Mem") {
533 var memNode = state.memoriesInModule[index];
534
535 if (typeof memNode === "undefined") {
536 throw new _helperApiError.CompileError("unknown memory ".concat(index));
537 }
538
539 id = t.numberLiteralFromRaw(index, String(index));
540 signature = null;
541 } else if (_helperWasmBytecode.default.exportTypes[typeIndex] === "Global") {
542 var global = state.globalsInModule[index];
543
544 if (typeof global === "undefined") {
545 throw new _helperApiError.CompileError("unknown global ".concat(index));
546 }
547
548 id = t.numberLiteralFromRaw(index, String(index));
549 signature = null;
550 } else {
551 console.warn("Unsupported export type: " + toHex(typeIndex));
552 return;
553 }
554
555 var endLoc = getPosition();
556 state.elementsInExportSection.push({
557 name: name.value,
558 type: _helperWasmBytecode.default.exportTypes[typeIndex],
559 signature: signature,
560 id: id,
561 index: index,
562 endLoc: endLoc,
563 startLoc: _startLoc3
564 });
565 }
566 } // Code section
567 // https://webassembly.github.io/spec/binary/modules.html#code-section
568
569
570 function parseCodeSection(numberOfFuncs) {
571 dump([numberOfFuncs], "number functions"); // Parse vector of function
572
573 for (var i = 0; i < numberOfFuncs; i++) {
574 var _startLoc4 = getPosition();
575
576 dumpSep("function body " + i); // the u32 size of the function code in bytes
577 // Ignore it for now
578
579 var bodySizeU32 = readU32();
580 eatBytes(bodySizeU32.nextIndex);
581 dump([bodySizeU32.value], "function body size");
582 var code = [];
583 /**
584 * Parse locals
585 */
586
587 var funcLocalNumU32 = readU32();
588 var funcLocalNum = funcLocalNumU32.value;
589 eatBytes(funcLocalNumU32.nextIndex);
590 dump([funcLocalNum], "num locals");
591 var locals = [];
592
593 for (var _i = 0; _i < funcLocalNum; _i++) {
594 var _startLoc5 = getPosition();
595
596 var localCountU32 = readU32();
597 var localCount = localCountU32.value;
598 eatBytes(localCountU32.nextIndex);
599 dump([localCount], "num local");
600 var valtypeByte = readByte();
601 eatBytes(1);
602 var type = _helperWasmBytecode.default.valtypes[valtypeByte];
603 var args = [];
604
605 for (var _i2 = 0; _i2 < localCount; _i2++) {
606 args.push(t.valtypeLiteral(type));
607 }
608
609 var localNode = function () {
610 var endLoc = getPosition();
611 return t.withLoc(t.instruction("local", args), endLoc, _startLoc5);
612 }();
613
614 locals.push(localNode);
615 dump([valtypeByte], type);
616
617 if (typeof type === "undefined") {
618 throw new _helperApiError.CompileError("Unexpected valtype: " + toHex(valtypeByte));
619 }
620 }
621
622 code.push.apply(code, locals); // Decode instructions until the end
623
624 parseInstructionBlock(code);
625 var endLoc = getPosition();
626 state.elementsInCodeSection.push({
627 code: code,
628 locals: locals,
629 endLoc: endLoc,
630 startLoc: _startLoc4,
631 bodySize: bodySizeU32.value
632 });
633 }
634 }
635
636 function parseInstructionBlock(code) {
637 while (true) {
638 var _startLoc6 = getPosition();
639
640 var instructionAlreadyCreated = false;
641 var instructionByte = readByte();
642 eatBytes(1);
643
644 if (instructionByte === 0xfe) {
645 instructionByte = 0xfe00 + readByte();
646 eatBytes(1);
647 }
648
649 var instruction = _helperWasmBytecode.default.symbolsByByte[instructionByte];
650
651 if (typeof instruction === "undefined") {
652 throw new _helperApiError.CompileError("Unexpected instruction: " + toHex(instructionByte));
653 }
654
655 if (typeof instruction.object === "string") {
656 dump([instructionByte], "".concat(instruction.object, ".").concat(instruction.name));
657 } else {
658 dump([instructionByte], instruction.name);
659 }
660 /**
661 * End of the function
662 */
663
664
665 if (instruction.name === "end") {
666 var node = function () {
667 var endLoc = getPosition();
668 return t.withLoc(t.instruction(instruction.name), endLoc, _startLoc6);
669 }();
670
671 code.push(node);
672 break;
673 }
674
675 var args = [];
676
677 if (instruction.name === "loop") {
678 var _startLoc7 = getPosition();
679
680 var blocktypeByte = readByte();
681 eatBytes(1);
682 var blocktype = _helperWasmBytecode.default.blockTypes[blocktypeByte];
683 dump([blocktypeByte], "blocktype");
684
685 if (typeof blocktype === "undefined") {
686 throw new _helperApiError.CompileError("Unexpected blocktype: " + toHex(blocktypeByte));
687 }
688
689 var instr = [];
690 parseInstructionBlock(instr); // preserve anonymous
691
692 var label = t.withRaw(t.identifier(getUniqueName("loop")), "");
693
694 var loopNode = function () {
695 var endLoc = getPosition();
696 return t.withLoc(t.loopInstruction(label, blocktype, instr), endLoc, _startLoc7);
697 }();
698
699 code.push(loopNode);
700 instructionAlreadyCreated = true;
701 } else if (instruction.name === "if") {
702 var _startLoc8 = getPosition();
703
704 var _blocktypeByte = readByte();
705
706 eatBytes(1);
707 var _blocktype = _helperWasmBytecode.default.blockTypes[_blocktypeByte];
708 dump([_blocktypeByte], "blocktype");
709
710 if (typeof _blocktype === "undefined") {
711 throw new _helperApiError.CompileError("Unexpected blocktype: " + toHex(_blocktypeByte));
712 }
713
714 var testIndex = t.withRaw(t.identifier(getUniqueName("if")), "");
715 var ifBody = [];
716 parseInstructionBlock(ifBody); // Defaults to no alternate
717
718 var elseIndex = 0;
719
720 for (elseIndex = 0; elseIndex < ifBody.length; ++elseIndex) {
721 var _instr = ifBody[elseIndex];
722
723 if (_instr.type === "Instr" && _instr.id === "else") {
724 break;
725 }
726 }
727
728 var consequentInstr = ifBody.slice(0, elseIndex);
729 var alternate = ifBody.slice(elseIndex + 1); // wast sugar
730
731 var testInstrs = [];
732
733 var ifNode = function () {
734 var endLoc = getPosition();
735 return t.withLoc(t.ifInstruction(testIndex, testInstrs, _blocktype, consequentInstr, alternate), endLoc, _startLoc8);
736 }();
737
738 code.push(ifNode);
739 instructionAlreadyCreated = true;
740 } else if (instruction.name === "block") {
741 var _startLoc9 = getPosition();
742
743 var _blocktypeByte2 = readByte();
744
745 eatBytes(1);
746 var _blocktype2 = _helperWasmBytecode.default.blockTypes[_blocktypeByte2];
747 dump([_blocktypeByte2], "blocktype");
748
749 if (typeof _blocktype2 === "undefined") {
750 throw new _helperApiError.CompileError("Unexpected blocktype: " + toHex(_blocktypeByte2));
751 }
752
753 var _instr2 = [];
754 parseInstructionBlock(_instr2); // preserve anonymous
755
756 var _label = t.withRaw(t.identifier(getUniqueName("block")), "");
757
758 var blockNode = function () {
759 var endLoc = getPosition();
760 return t.withLoc(t.blockInstruction(_label, _instr2, _blocktype2), endLoc, _startLoc9);
761 }();
762
763 code.push(blockNode);
764 instructionAlreadyCreated = true;
765 } else if (instruction.name === "call") {
766 var indexu32 = readU32();
767 var index = indexu32.value;
768 eatBytes(indexu32.nextIndex);
769 dump([index], "index");
770
771 var callNode = function () {
772 var endLoc = getPosition();
773 return t.withLoc(t.callInstruction(t.indexLiteral(index)), endLoc, _startLoc6);
774 }();
775
776 code.push(callNode);
777 instructionAlreadyCreated = true;
778 } else if (instruction.name === "call_indirect") {
779 var _startLoc10 = getPosition();
780
781 var indexU32 = readU32();
782 var typeindex = indexU32.value;
783 eatBytes(indexU32.nextIndex);
784 dump([typeindex], "type index");
785 var signature = state.typesInModule[typeindex];
786
787 if (typeof signature === "undefined") {
788 throw new _helperApiError.CompileError("call_indirect signature not found (".concat(typeindex, ")"));
789 }
790
791 var _callNode = t.callIndirectInstruction(t.signature(signature.params, signature.result), []);
792
793 var flagU32 = readU32();
794 var flag = flagU32.value; // 0x00 - reserved byte
795
796 eatBytes(flagU32.nextIndex);
797
798 if (flag !== 0) {
799 throw new _helperApiError.CompileError("zero flag expected");
800 }
801
802 code.push(function () {
803 var endLoc = getPosition();
804 return t.withLoc(_callNode, endLoc, _startLoc10);
805 }());
806 instructionAlreadyCreated = true;
807 } else if (instruction.name === "br_table") {
808 var indicesu32 = readU32();
809 var indices = indicesu32.value;
810 eatBytes(indicesu32.nextIndex);
811 dump([indices], "num indices");
812
813 for (var i = 0; i <= indices; i++) {
814 var _indexu = readU32();
815
816 var _index = _indexu.value;
817 eatBytes(_indexu.nextIndex);
818 dump([_index], "index");
819 args.push(t.numberLiteralFromRaw(_indexu.value.toString(), "u32"));
820 }
821 } else if (instructionByte >= 0x28 && instructionByte <= 0x40) {
822 /**
823 * Memory instructions
824 */
825 if (instruction.name === "grow_memory" || instruction.name === "current_memory") {
826 var _indexU = readU32();
827
828 var _index2 = _indexU.value;
829 eatBytes(_indexU.nextIndex);
830
831 if (_index2 !== 0) {
832 throw new Error("zero flag expected");
833 }
834
835 dump([_index2], "index");
836 } else {
837 var aligun32 = readU32();
838 var align = aligun32.value;
839 eatBytes(aligun32.nextIndex);
840 dump([align], "align");
841 var offsetu32 = readU32();
842 var _offset2 = offsetu32.value;
843 eatBytes(offsetu32.nextIndex);
844 dump([_offset2], "offset");
845 }
846 } else if (instructionByte >= 0x41 && instructionByte <= 0x44) {
847 /**
848 * Numeric instructions
849 */
850 if (instruction.object === "i32") {
851 var value32 = read32();
852 var value = value32.value;
853 eatBytes(value32.nextIndex);
854 dump([value], "i32 value");
855 args.push(t.numberLiteralFromRaw(value));
856 }
857
858 if (instruction.object === "u32") {
859 var valueu32 = readU32();
860 var _value = valueu32.value;
861 eatBytes(valueu32.nextIndex);
862 dump([_value], "u32 value");
863 args.push(t.numberLiteralFromRaw(_value));
864 }
865
866 if (instruction.object === "i64") {
867 var value64 = read64();
868 var _value2 = value64.value;
869 eatBytes(value64.nextIndex);
870 dump([Number(_value2.toString())], "i64 value");
871 var high = _value2.high,
872 low = _value2.low;
873 var _node = {
874 type: "LongNumberLiteral",
875 value: {
876 high: high,
877 low: low
878 }
879 };
880 args.push(_node);
881 }
882
883 if (instruction.object === "u64") {
884 var valueu64 = readU64();
885 var _value3 = valueu64.value;
886 eatBytes(valueu64.nextIndex);
887 dump([Number(_value3.toString())], "u64 value");
888 var _high = _value3.high,
889 _low = _value3.low;
890 var _node2 = {
891 type: "LongNumberLiteral",
892 value: {
893 high: _high,
894 low: _low
895 }
896 };
897 args.push(_node2);
898 }
899
900 if (instruction.object === "f32") {
901 var valuef32 = readF32();
902 var _value4 = valuef32.value;
903 eatBytes(valuef32.nextIndex);
904 dump([_value4], "f32 value");
905 args.push( // $FlowIgnore
906 t.floatLiteral(_value4, valuef32.nan, valuef32.inf, String(_value4)));
907 }
908
909 if (instruction.object === "f64") {
910 var valuef64 = readF64();
911 var _value5 = valuef64.value;
912 eatBytes(valuef64.nextIndex);
913 dump([_value5], "f64 value");
914 args.push( // $FlowIgnore
915 t.floatLiteral(_value5, valuef64.nan, valuef64.inf, String(_value5)));
916 }
917 } else if (instructionByte >= 0xfe00 && instructionByte <= 0xfeff) {
918 /**
919 * Atomic memory instructions
920 */
921 var align32 = readU32();
922 var _align = align32.value;
923 eatBytes(align32.nextIndex);
924 dump([_align], "align");
925
926 var _offsetu = readU32();
927
928 var _offset3 = _offsetu.value;
929 eatBytes(_offsetu.nextIndex);
930 dump([_offset3], "offset");
931 } else {
932 for (var _i3 = 0; _i3 < instruction.numberOfArgs; _i3++) {
933 var u32 = readU32();
934 eatBytes(u32.nextIndex);
935 dump([u32.value], "argument " + _i3);
936 args.push(t.numberLiteralFromRaw(u32.value));
937 }
938 }
939
940 if (instructionAlreadyCreated === false) {
941 if (typeof instruction.object === "string") {
942 var _node3 = function () {
943 var endLoc = getPosition();
944 return t.withLoc(t.objectInstruction(instruction.name, instruction.object, args), endLoc, _startLoc6);
945 }();
946
947 code.push(_node3);
948 } else {
949 var _node4 = function () {
950 var endLoc = getPosition();
951 return t.withLoc(t.instruction(instruction.name, args), endLoc, _startLoc6);
952 }();
953
954 code.push(_node4);
955 }
956 }
957 }
958 } // https://webassembly.github.io/spec/core/binary/types.html#limits
959
960
961 function parseLimits() {
962 var limitType = readByte();
963 eatBytes(1);
964 var shared = limitType === 0x03;
965 dump([limitType], "limit type" + (shared ? " (shared)" : ""));
966 var min, max;
967
968 if (limitType === 0x01 || limitType === 0x03 // shared limits
969 ) {
970 var u32min = readU32();
971 min = parseInt(u32min.value);
972 eatBytes(u32min.nextIndex);
973 dump([min], "min");
974 var u32max = readU32();
975 max = parseInt(u32max.value);
976 eatBytes(u32max.nextIndex);
977 dump([max], "max");
978 }
979
980 if (limitType === 0x00) {
981 var _u32min = readU32();
982
983 min = parseInt(_u32min.value);
984 eatBytes(_u32min.nextIndex);
985 dump([min], "min");
986 }
987
988 return t.limit(min, max, shared);
989 } // https://webassembly.github.io/spec/core/binary/types.html#binary-tabletype
990
991
992 function parseTableType(index) {
993 var name = t.withRaw(t.identifier(getUniqueName("table")), String(index));
994 var elementTypeByte = readByte();
995 eatBytes(1);
996 dump([elementTypeByte], "element type");
997 var elementType = _helperWasmBytecode.default.tableTypes[elementTypeByte];
998
999 if (typeof elementType === "undefined") {
1000 throw new _helperApiError.CompileError("Unknown element type in table: " + toHex(elementType));
1001 }
1002
1003 var limits = parseLimits();
1004 return t.table(elementType, limits, name);
1005 } // https://webassembly.github.io/spec/binary/types.html#global-types
1006
1007
1008 function parseGlobalType() {
1009 var valtypeByte = readByte();
1010 eatBytes(1);
1011 var type = _helperWasmBytecode.default.valtypes[valtypeByte];
1012 dump([valtypeByte], type);
1013
1014 if (typeof type === "undefined") {
1015 throw new _helperApiError.CompileError("Unknown valtype: " + toHex(valtypeByte));
1016 }
1017
1018 var globalTypeByte = readByte();
1019 eatBytes(1);
1020 var globalType = _helperWasmBytecode.default.globalTypes[globalTypeByte];
1021 dump([globalTypeByte], "global type (".concat(globalType, ")"));
1022
1023 if (typeof globalType === "undefined") {
1024 throw new _helperApiError.CompileError("Invalid mutability: " + toHex(globalTypeByte));
1025 }
1026
1027 return t.globalType(type, globalType);
1028 } // function parseNameModule() {
1029 // const lenu32 = readVaruint32();
1030 // eatBytes(lenu32.nextIndex);
1031 // console.log("len", lenu32);
1032 // const strlen = lenu32.value;
1033 // dump([strlen], "string length");
1034 // const bytes = readBytes(strlen);
1035 // eatBytes(strlen);
1036 // const value = utf8.decode(bytes);
1037 // return [t.moduleNameMetadata(value)];
1038 // }
1039 // this section contains an array of function names and indices
1040
1041
1042 function parseNameSectionFunctions() {
1043 var functionNames = [];
1044 var numberOfFunctionsu32 = readU32();
1045 var numbeOfFunctions = numberOfFunctionsu32.value;
1046 eatBytes(numberOfFunctionsu32.nextIndex);
1047
1048 for (var i = 0; i < numbeOfFunctions; i++) {
1049 var indexu32 = readU32();
1050 var index = indexu32.value;
1051 eatBytes(indexu32.nextIndex);
1052 var name = readUTF8String();
1053 eatBytes(name.nextIndex);
1054 functionNames.push(t.functionNameMetadata(name.value, index));
1055 }
1056
1057 return functionNames;
1058 }
1059
1060 function parseNameSectionLocals() {
1061 var localNames = [];
1062 var numbeOfFunctionsu32 = readU32();
1063 var numbeOfFunctions = numbeOfFunctionsu32.value;
1064 eatBytes(numbeOfFunctionsu32.nextIndex);
1065
1066 for (var i = 0; i < numbeOfFunctions; i++) {
1067 var functionIndexu32 = readU32();
1068 var functionIndex = functionIndexu32.value;
1069 eatBytes(functionIndexu32.nextIndex);
1070 var numLocalsu32 = readU32();
1071 var numLocals = numLocalsu32.value;
1072 eatBytes(numLocalsu32.nextIndex);
1073
1074 for (var _i4 = 0; _i4 < numLocals; _i4++) {
1075 var localIndexu32 = readU32();
1076 var localIndex = localIndexu32.value;
1077 eatBytes(localIndexu32.nextIndex);
1078 var name = readUTF8String();
1079 eatBytes(name.nextIndex);
1080 localNames.push(t.localNameMetadata(name.value, localIndex, functionIndex));
1081 }
1082 }
1083
1084 return localNames;
1085 } // this is a custom section used for name resolution
1086 // https://github.com/WebAssembly/design/blob/master/BinaryEncoding.md#name-section
1087
1088
1089 function parseNameSection(remainingBytes) {
1090 var nameMetadata = [];
1091 var initialOffset = offset;
1092
1093 while (offset - initialOffset < remainingBytes) {
1094 // name_type
1095 var sectionTypeByte = readVaruint7();
1096 eatBytes(sectionTypeByte.nextIndex); // name_payload_len
1097
1098 var subSectionSizeInBytesu32 = readVaruint32();
1099 eatBytes(subSectionSizeInBytesu32.nextIndex);
1100
1101 switch (sectionTypeByte.value) {
1102 // case 0: {
1103 // TODO(sven): re-enable that
1104 // Current status: it seems that when we decode the module's name
1105 // no name_payload_len is used.
1106 //
1107 // See https://github.com/WebAssembly/design/blob/master/BinaryEncoding.md#name-section
1108 //
1109 // nameMetadata.push(...parseNameModule());
1110 // break;
1111 // }
1112 case 1:
1113 {
1114 nameMetadata.push.apply(nameMetadata, _toConsumableArray(parseNameSectionFunctions()));
1115 break;
1116 }
1117
1118 case 2:
1119 {
1120 nameMetadata.push.apply(nameMetadata, _toConsumableArray(parseNameSectionLocals()));
1121 break;
1122 }
1123
1124 default:
1125 {
1126 // skip unknown subsection
1127 eatBytes(subSectionSizeInBytesu32.value);
1128 }
1129 }
1130 }
1131
1132 return nameMetadata;
1133 } // this is a custom section used for information about the producers
1134 // https://github.com/WebAssembly/tool-conventions/blob/master/ProducersSection.md
1135
1136
1137 function parseProducersSection() {
1138 var metadata = t.producersSectionMetadata([]); // field_count
1139
1140 var sectionTypeByte = readVaruint32();
1141 eatBytes(sectionTypeByte.nextIndex);
1142 dump([sectionTypeByte.value], "num of producers");
1143 var fields = {
1144 language: [],
1145 "processed-by": [],
1146 sdk: []
1147 }; // fields
1148
1149 for (var fieldI = 0; fieldI < sectionTypeByte.value; fieldI++) {
1150 // field_name
1151 var fieldName = readUTF8String();
1152 eatBytes(fieldName.nextIndex); // field_value_count
1153
1154 var valueCount = readVaruint32();
1155 eatBytes(valueCount.nextIndex); // field_values
1156
1157 for (var producerI = 0; producerI < valueCount.value; producerI++) {
1158 var producerName = readUTF8String();
1159 eatBytes(producerName.nextIndex);
1160 var producerVersion = readUTF8String();
1161 eatBytes(producerVersion.nextIndex);
1162 fields[fieldName.value].push(t.producerMetadataVersionedName(producerName.value, producerVersion.value));
1163 }
1164
1165 metadata.producers.push(fields[fieldName.value]);
1166 }
1167
1168 return metadata;
1169 }
1170
1171 function parseGlobalSection(numberOfGlobals) {
1172 var globals = [];
1173 dump([numberOfGlobals], "num globals");
1174
1175 for (var i = 0; i < numberOfGlobals; i++) {
1176 var _startLoc11 = getPosition();
1177
1178 var globalType = parseGlobalType();
1179 /**
1180 * Global expressions
1181 */
1182
1183 var init = [];
1184 parseInstructionBlock(init);
1185
1186 var node = function () {
1187 var endLoc = getPosition();
1188 return t.withLoc(t.global(globalType, init), endLoc, _startLoc11);
1189 }();
1190
1191 globals.push(node);
1192 state.globalsInModule.push(node);
1193 }
1194
1195 return globals;
1196 }
1197
1198 function parseElemSection(numberOfElements) {
1199 var elems = [];
1200 dump([numberOfElements], "num elements");
1201
1202 for (var i = 0; i < numberOfElements; i++) {
1203 var _startLoc12 = getPosition();
1204
1205 var tableindexu32 = readU32();
1206 var tableindex = tableindexu32.value;
1207 eatBytes(tableindexu32.nextIndex);
1208 dump([tableindex], "table index");
1209 /**
1210 * Parse instructions
1211 */
1212
1213 var instr = [];
1214 parseInstructionBlock(instr);
1215 /**
1216 * Parse ( vector function index ) *
1217 */
1218
1219 var indicesu32 = readU32();
1220 var indices = indicesu32.value;
1221 eatBytes(indicesu32.nextIndex);
1222 dump([indices], "num indices");
1223 var indexValues = [];
1224
1225 for (var _i5 = 0; _i5 < indices; _i5++) {
1226 var indexu32 = readU32();
1227 var index = indexu32.value;
1228 eatBytes(indexu32.nextIndex);
1229 dump([index], "index");
1230 indexValues.push(t.indexLiteral(index));
1231 }
1232
1233 var elemNode = function () {
1234 var endLoc = getPosition();
1235 return t.withLoc(t.elem(t.indexLiteral(tableindex), instr, indexValues), endLoc, _startLoc12);
1236 }();
1237
1238 elems.push(elemNode);
1239 }
1240
1241 return elems;
1242 } // https://webassembly.github.io/spec/core/binary/types.html#memory-types
1243
1244
1245 function parseMemoryType(i) {
1246 var limits = parseLimits();
1247 return t.memory(limits, t.indexLiteral(i));
1248 } // https://webassembly.github.io/spec/binary/modules.html#table-section
1249
1250
1251 function parseTableSection(numberOfElements) {
1252 var tables = [];
1253 dump([numberOfElements], "num elements");
1254
1255 for (var i = 0; i < numberOfElements; i++) {
1256 var tablesNode = parseTableType(i);
1257 state.tablesInModule.push(tablesNode);
1258 tables.push(tablesNode);
1259 }
1260
1261 return tables;
1262 } // https://webassembly.github.io/spec/binary/modules.html#memory-section
1263
1264
1265 function parseMemorySection(numberOfElements) {
1266 var memories = [];
1267 dump([numberOfElements], "num elements");
1268
1269 for (var i = 0; i < numberOfElements; i++) {
1270 var memoryNode = parseMemoryType(i);
1271 state.memoriesInModule.push(memoryNode);
1272 memories.push(memoryNode);
1273 }
1274
1275 return memories;
1276 } // https://webassembly.github.io/spec/binary/modules.html#binary-startsec
1277
1278
1279 function parseStartSection() {
1280 var startLoc = getPosition();
1281 var u32 = readU32();
1282 var startFuncIndex = u32.value;
1283 eatBytes(u32.nextIndex);
1284 dump([startFuncIndex], "index");
1285 return function () {
1286 var endLoc = getPosition();
1287 return t.withLoc(t.start(t.indexLiteral(startFuncIndex)), endLoc, startLoc);
1288 }();
1289 } // https://webassembly.github.io/spec/binary/modules.html#data-section
1290
1291
1292 function parseDataSection(numberOfElements) {
1293 var dataEntries = [];
1294 dump([numberOfElements], "num elements");
1295
1296 for (var i = 0; i < numberOfElements; i++) {
1297 var memoryIndexu32 = readU32();
1298 var memoryIndex = memoryIndexu32.value;
1299 eatBytes(memoryIndexu32.nextIndex);
1300 dump([memoryIndex], "memory index");
1301 var instrs = [];
1302 parseInstructionBlock(instrs);
1303 var hasExtraInstrs = instrs.filter(function (i) {
1304 return i.id !== "end";
1305 }).length !== 1;
1306
1307 if (hasExtraInstrs) {
1308 throw new _helperApiError.CompileError("data section offset must be a single instruction");
1309 }
1310
1311 var bytes = parseVec(function (b) {
1312 return b;
1313 });
1314 dump([], "init");
1315 dataEntries.push(t.data(t.memIndexLiteral(memoryIndex), instrs[0], t.byteArray(bytes)));
1316 }
1317
1318 return dataEntries;
1319 } // https://webassembly.github.io/spec/binary/modules.html#binary-section
1320
1321
1322 function parseSection(sectionIndex) {
1323 var sectionId = readByte();
1324 eatBytes(1);
1325
1326 if (sectionId >= sectionIndex || sectionIndex === _helperWasmBytecode.default.sections.custom) {
1327 sectionIndex = sectionId + 1;
1328 } else {
1329 if (sectionId !== _helperWasmBytecode.default.sections.custom) throw new _helperApiError.CompileError("Unexpected section: " + toHex(sectionId));
1330 }
1331
1332 var nextSectionIndex = sectionIndex;
1333 var startOffset = offset;
1334 var startLoc = getPosition();
1335 var u32 = readU32();
1336 var sectionSizeInBytes = u32.value;
1337 eatBytes(u32.nextIndex);
1338
1339 var sectionSizeInBytesNode = function () {
1340 var endLoc = getPosition();
1341 return t.withLoc(t.numberLiteralFromRaw(sectionSizeInBytes), endLoc, startLoc);
1342 }();
1343
1344 switch (sectionId) {
1345 case _helperWasmBytecode.default.sections.type:
1346 {
1347 dumpSep("section Type");
1348 dump([sectionId], "section code");
1349 dump([sectionSizeInBytes], "section size");
1350
1351 var _startLoc13 = getPosition();
1352
1353 var _u = readU32();
1354
1355 var numberOfTypes = _u.value;
1356 eatBytes(_u.nextIndex);
1357
1358 var _metadata = t.sectionMetadata("type", startOffset, sectionSizeInBytesNode, function () {
1359 var endLoc = getPosition();
1360 return t.withLoc(t.numberLiteralFromRaw(numberOfTypes), endLoc, _startLoc13);
1361 }());
1362
1363 var _nodes = parseTypeSection(numberOfTypes);
1364
1365 return {
1366 nodes: _nodes,
1367 metadata: _metadata,
1368 nextSectionIndex: nextSectionIndex
1369 };
1370 }
1371
1372 case _helperWasmBytecode.default.sections.table:
1373 {
1374 dumpSep("section Table");
1375 dump([sectionId], "section code");
1376 dump([sectionSizeInBytes], "section size");
1377
1378 var _startLoc14 = getPosition();
1379
1380 var _u2 = readU32();
1381
1382 var numberOfTable = _u2.value;
1383 eatBytes(_u2.nextIndex);
1384 dump([numberOfTable], "num tables");
1385
1386 var _metadata2 = t.sectionMetadata("table", startOffset, sectionSizeInBytesNode, function () {
1387 var endLoc = getPosition();
1388 return t.withLoc(t.numberLiteralFromRaw(numberOfTable), endLoc, _startLoc14);
1389 }());
1390
1391 var _nodes2 = parseTableSection(numberOfTable);
1392
1393 return {
1394 nodes: _nodes2,
1395 metadata: _metadata2,
1396 nextSectionIndex: nextSectionIndex
1397 };
1398 }
1399
1400 case _helperWasmBytecode.default.sections.import:
1401 {
1402 dumpSep("section Import");
1403 dump([sectionId], "section code");
1404 dump([sectionSizeInBytes], "section size");
1405
1406 var _startLoc15 = getPosition();
1407
1408 var numberOfImportsu32 = readU32();
1409 var numberOfImports = numberOfImportsu32.value;
1410 eatBytes(numberOfImportsu32.nextIndex);
1411 dump([numberOfImports], "number of imports");
1412
1413 var _metadata3 = t.sectionMetadata("import", startOffset, sectionSizeInBytesNode, function () {
1414 var endLoc = getPosition();
1415 return t.withLoc(t.numberLiteralFromRaw(numberOfImports), endLoc, _startLoc15);
1416 }());
1417
1418 var _nodes3 = parseImportSection(numberOfImports);
1419
1420 return {
1421 nodes: _nodes3,
1422 metadata: _metadata3,
1423 nextSectionIndex: nextSectionIndex
1424 };
1425 }
1426
1427 case _helperWasmBytecode.default.sections.func:
1428 {
1429 dumpSep("section Function");
1430 dump([sectionId], "section code");
1431 dump([sectionSizeInBytes], "section size");
1432
1433 var _startLoc16 = getPosition();
1434
1435 var numberOfFunctionsu32 = readU32();
1436 var numberOfFunctions = numberOfFunctionsu32.value;
1437 eatBytes(numberOfFunctionsu32.nextIndex);
1438
1439 var _metadata4 = t.sectionMetadata("func", startOffset, sectionSizeInBytesNode, function () {
1440 var endLoc = getPosition();
1441 return t.withLoc(t.numberLiteralFromRaw(numberOfFunctions), endLoc, _startLoc16);
1442 }());
1443
1444 parseFuncSection(numberOfFunctions);
1445 var _nodes4 = [];
1446 return {
1447 nodes: _nodes4,
1448 metadata: _metadata4,
1449 nextSectionIndex: nextSectionIndex
1450 };
1451 }
1452
1453 case _helperWasmBytecode.default.sections.export:
1454 {
1455 dumpSep("section Export");
1456 dump([sectionId], "section code");
1457 dump([sectionSizeInBytes], "section size");
1458
1459 var _startLoc17 = getPosition();
1460
1461 var _u3 = readU32();
1462
1463 var numberOfExport = _u3.value;
1464 eatBytes(_u3.nextIndex);
1465
1466 var _metadata5 = t.sectionMetadata("export", startOffset, sectionSizeInBytesNode, function () {
1467 var endLoc = getPosition();
1468 return t.withLoc(t.numberLiteralFromRaw(numberOfExport), endLoc, _startLoc17);
1469 }());
1470
1471 parseExportSection(numberOfExport);
1472 var _nodes5 = [];
1473 return {
1474 nodes: _nodes5,
1475 metadata: _metadata5,
1476 nextSectionIndex: nextSectionIndex
1477 };
1478 }
1479
1480 case _helperWasmBytecode.default.sections.code:
1481 {
1482 dumpSep("section Code");
1483 dump([sectionId], "section code");
1484 dump([sectionSizeInBytes], "section size");
1485
1486 var _startLoc18 = getPosition();
1487
1488 var _u4 = readU32();
1489
1490 var numberOfFuncs = _u4.value;
1491 eatBytes(_u4.nextIndex);
1492
1493 var _metadata6 = t.sectionMetadata("code", startOffset, sectionSizeInBytesNode, function () {
1494 var endLoc = getPosition();
1495 return t.withLoc(t.numberLiteralFromRaw(numberOfFuncs), endLoc, _startLoc18);
1496 }());
1497
1498 if (opts.ignoreCodeSection === true) {
1499 var remainingBytes = sectionSizeInBytes - _u4.nextIndex;
1500 eatBytes(remainingBytes); // eat the entire section
1501 } else {
1502 parseCodeSection(numberOfFuncs);
1503 }
1504
1505 var _nodes6 = [];
1506 return {
1507 nodes: _nodes6,
1508 metadata: _metadata6,
1509 nextSectionIndex: nextSectionIndex
1510 };
1511 }
1512
1513 case _helperWasmBytecode.default.sections.start:
1514 {
1515 dumpSep("section Start");
1516 dump([sectionId], "section code");
1517 dump([sectionSizeInBytes], "section size");
1518
1519 var _metadata7 = t.sectionMetadata("start", startOffset, sectionSizeInBytesNode);
1520
1521 var _nodes7 = [parseStartSection()];
1522 return {
1523 nodes: _nodes7,
1524 metadata: _metadata7,
1525 nextSectionIndex: nextSectionIndex
1526 };
1527 }
1528
1529 case _helperWasmBytecode.default.sections.element:
1530 {
1531 dumpSep("section Element");
1532 dump([sectionId], "section code");
1533 dump([sectionSizeInBytes], "section size");
1534
1535 var _startLoc19 = getPosition();
1536
1537 var numberOfElementsu32 = readU32();
1538 var numberOfElements = numberOfElementsu32.value;
1539 eatBytes(numberOfElementsu32.nextIndex);
1540
1541 var _metadata8 = t.sectionMetadata("element", startOffset, sectionSizeInBytesNode, function () {
1542 var endLoc = getPosition();
1543 return t.withLoc(t.numberLiteralFromRaw(numberOfElements), endLoc, _startLoc19);
1544 }());
1545
1546 var _nodes8 = parseElemSection(numberOfElements);
1547
1548 return {
1549 nodes: _nodes8,
1550 metadata: _metadata8,
1551 nextSectionIndex: nextSectionIndex
1552 };
1553 }
1554
1555 case _helperWasmBytecode.default.sections.global:
1556 {
1557 dumpSep("section Global");
1558 dump([sectionId], "section code");
1559 dump([sectionSizeInBytes], "section size");
1560
1561 var _startLoc20 = getPosition();
1562
1563 var numberOfGlobalsu32 = readU32();
1564 var numberOfGlobals = numberOfGlobalsu32.value;
1565 eatBytes(numberOfGlobalsu32.nextIndex);
1566
1567 var _metadata9 = t.sectionMetadata("global", startOffset, sectionSizeInBytesNode, function () {
1568 var endLoc = getPosition();
1569 return t.withLoc(t.numberLiteralFromRaw(numberOfGlobals), endLoc, _startLoc20);
1570 }());
1571
1572 var _nodes9 = parseGlobalSection(numberOfGlobals);
1573
1574 return {
1575 nodes: _nodes9,
1576 metadata: _metadata9,
1577 nextSectionIndex: nextSectionIndex
1578 };
1579 }
1580
1581 case _helperWasmBytecode.default.sections.memory:
1582 {
1583 dumpSep("section Memory");
1584 dump([sectionId], "section code");
1585 dump([sectionSizeInBytes], "section size");
1586
1587 var _startLoc21 = getPosition();
1588
1589 var _numberOfElementsu = readU32();
1590
1591 var _numberOfElements = _numberOfElementsu.value;
1592 eatBytes(_numberOfElementsu.nextIndex);
1593
1594 var _metadata10 = t.sectionMetadata("memory", startOffset, sectionSizeInBytesNode, function () {
1595 var endLoc = getPosition();
1596 return t.withLoc(t.numberLiteralFromRaw(_numberOfElements), endLoc, _startLoc21);
1597 }());
1598
1599 var _nodes10 = parseMemorySection(_numberOfElements);
1600
1601 return {
1602 nodes: _nodes10,
1603 metadata: _metadata10,
1604 nextSectionIndex: nextSectionIndex
1605 };
1606 }
1607
1608 case _helperWasmBytecode.default.sections.data:
1609 {
1610 dumpSep("section Data");
1611 dump([sectionId], "section code");
1612 dump([sectionSizeInBytes], "section size");
1613
1614 var _metadata11 = t.sectionMetadata("data", startOffset, sectionSizeInBytesNode);
1615
1616 var _startLoc22 = getPosition();
1617
1618 var _numberOfElementsu2 = readU32();
1619
1620 var _numberOfElements2 = _numberOfElementsu2.value;
1621 eatBytes(_numberOfElementsu2.nextIndex);
1622
1623 _metadata11.vectorOfSize = function () {
1624 var endLoc = getPosition();
1625 return t.withLoc(t.numberLiteralFromRaw(_numberOfElements2), endLoc, _startLoc22);
1626 }();
1627
1628 if (opts.ignoreDataSection === true) {
1629 var _remainingBytes = sectionSizeInBytes - _numberOfElementsu2.nextIndex;
1630
1631 eatBytes(_remainingBytes); // eat the entire section
1632
1633 dumpSep("ignore data (" + sectionSizeInBytes + " bytes)");
1634 return {
1635 nodes: [],
1636 metadata: _metadata11,
1637 nextSectionIndex: nextSectionIndex
1638 };
1639 } else {
1640 var _nodes11 = parseDataSection(_numberOfElements2);
1641
1642 return {
1643 nodes: _nodes11,
1644 metadata: _metadata11,
1645 nextSectionIndex: nextSectionIndex
1646 };
1647 }
1648 }
1649
1650 case _helperWasmBytecode.default.sections.custom:
1651 {
1652 dumpSep("section Custom");
1653 dump([sectionId], "section code");
1654 dump([sectionSizeInBytes], "section size");
1655 var _metadata12 = [t.sectionMetadata("custom", startOffset, sectionSizeInBytesNode)];
1656 var sectionName = readUTF8String();
1657 eatBytes(sectionName.nextIndex);
1658 dump([], "section name (".concat(sectionName.value, ")"));
1659
1660 var _remainingBytes2 = sectionSizeInBytes - sectionName.nextIndex;
1661
1662 if (sectionName.value === "name") {
1663 var initialOffset = offset;
1664
1665 try {
1666 _metadata12.push.apply(_metadata12, _toConsumableArray(parseNameSection(_remainingBytes2)));
1667 } catch (e) {
1668 console.warn("Failed to decode custom \"name\" section @".concat(offset, "; ignoring (").concat(e.message, ")."));
1669 eatBytes(offset - (initialOffset + _remainingBytes2));
1670 }
1671 } else if (sectionName.value === "producers") {
1672 var _initialOffset = offset;
1673
1674 try {
1675 _metadata12.push(parseProducersSection());
1676 } catch (e) {
1677 console.warn("Failed to decode custom \"producers\" section @".concat(offset, "; ignoring (").concat(e.message, ")."));
1678 eatBytes(offset - (_initialOffset + _remainingBytes2));
1679 }
1680 } else {
1681 // We don't parse the custom section
1682 eatBytes(_remainingBytes2);
1683 dumpSep("ignore custom " + JSON.stringify(sectionName.value) + " section (" + _remainingBytes2 + " bytes)");
1684 }
1685
1686 return {
1687 nodes: [],
1688 metadata: _metadata12,
1689 nextSectionIndex: nextSectionIndex
1690 };
1691 }
1692 }
1693
1694 throw new _helperApiError.CompileError("Unexpected section: " + toHex(sectionId));
1695 }
1696
1697 parseModuleHeader();
1698 parseVersion();
1699 var moduleFields = [];
1700 var sectionIndex = 0;
1701 var moduleMetadata = {
1702 sections: [],
1703 functionNames: [],
1704 localNames: [],
1705 producers: []
1706 };
1707 /**
1708 * All the generate declaration are going to be stored in our state
1709 */
1710
1711 while (offset < buf.length) {
1712 var _parseSection = parseSection(sectionIndex),
1713 _nodes12 = _parseSection.nodes,
1714 _metadata13 = _parseSection.metadata,
1715 nextSectionIndex = _parseSection.nextSectionIndex;
1716
1717 moduleFields.push.apply(moduleFields, _toConsumableArray(_nodes12));
1718 var metadataArray = Array.isArray(_metadata13) ? _metadata13 : [_metadata13];
1719 metadataArray.forEach(function (metadataItem) {
1720 if (metadataItem.type === "FunctionNameMetadata") {
1721 moduleMetadata.functionNames.push(metadataItem);
1722 } else if (metadataItem.type === "LocalNameMetadata") {
1723 moduleMetadata.localNames.push(metadataItem);
1724 } else if (metadataItem.type === "ProducersSectionMetadata") {
1725 moduleMetadata.producers.push(metadataItem);
1726 } else {
1727 moduleMetadata.sections.push(metadataItem);
1728 }
1729 }); // Ignore custom section
1730
1731 if (nextSectionIndex) {
1732 sectionIndex = nextSectionIndex;
1733 }
1734 }
1735 /**
1736 * Transform the state into AST nodes
1737 */
1738
1739
1740 var funcIndex = 0;
1741 state.functionsInModule.forEach(function (func) {
1742 var params = func.signature.params;
1743 var result = func.signature.result;
1744 var body = []; // External functions doesn't provide any code, can skip it here
1745
1746 if (func.isExternal === true) {
1747 return;
1748 }
1749
1750 var decodedElementInCodeSection = state.elementsInCodeSection[funcIndex];
1751
1752 if (opts.ignoreCodeSection === false) {
1753 if (typeof decodedElementInCodeSection === "undefined") {
1754 throw new _helperApiError.CompileError("func " + toHex(funcIndex) + " code not found");
1755 }
1756
1757 body = decodedElementInCodeSection.code;
1758 }
1759
1760 funcIndex++;
1761 var funcNode = t.func(func.id, t.signature(params, result), body);
1762
1763 if (func.isExternal === true) {
1764 funcNode.isExternal = func.isExternal;
1765 } // Add function position in the binary if possible
1766
1767
1768 if (opts.ignoreCodeSection === false) {
1769 var _startLoc23 = decodedElementInCodeSection.startLoc,
1770 endLoc = decodedElementInCodeSection.endLoc,
1771 bodySize = decodedElementInCodeSection.bodySize;
1772 funcNode = t.withLoc(funcNode, endLoc, _startLoc23);
1773 funcNode.metadata = {
1774 bodySize: bodySize
1775 };
1776 }
1777
1778 moduleFields.push(funcNode);
1779 });
1780 state.elementsInExportSection.forEach(function (moduleExport) {
1781 /**
1782 * If the export has no id, we won't be able to call it from the outside
1783 * so we can omit it
1784 */
1785 if (moduleExport.id != null) {
1786 moduleFields.push(t.withLoc(t.moduleExport(moduleExport.name, t.moduleExportDescr(moduleExport.type, moduleExport.id)), moduleExport.endLoc, moduleExport.startLoc));
1787 }
1788 });
1789 dumpSep("end of program");
1790 var module = t.module(null, moduleFields, t.moduleMetadata(moduleMetadata.sections, moduleMetadata.functionNames, moduleMetadata.localNames, moduleMetadata.producers));
1791 return t.program([module]);
1792}
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