-
Notifications
You must be signed in to change notification settings - Fork 3.3k
/
preamble.js
1129 lines (1008 loc) · 34.6 KB
/
preamble.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/**
* @license
* Copyright 2010 The Emscripten Authors
* SPDX-License-Identifier: MIT
*/
// === Preamble library stuff ===
// Documentation for the public APIs defined in this file must be updated in:
// site/source/docs/api_reference/preamble.js.rst
// A prebuilt local version of the documentation is available at:
// site/build/text/docs/api_reference/preamble.js.txt
// You can also build docs locally as HTML or other formats in site/
// An online HTML version (which may be of a different version of Emscripten)
// is up at http://kripken.github.io/emscripten-site/docs/api_reference/preamble.js.html
#if PTHREADS
#include "runtime_pthread.js"
#endif
#if RELOCATABLE
{{{ makeModuleReceiveWithVar('dynamicLibraries', undefined, '[]', true) }}}
#endif
{{{ makeModuleReceiveWithVar('wasmBinary') }}}
#if WASM != 2 && MAYBE_WASM2JS
#if !WASM2JS
if (Module['doWasm2JS']) {
#endif
#include "wasm2js.js"
#if !WASM2JS
}
#endif
#endif
#if ASSERTIONS && WASM == 1
if (typeof WebAssembly != 'object') {
err('no native wasm support detected');
}
#endif
#if SAFE_HEAP
#include "runtime_safe_heap.js"
#endif
#if USE_ASAN
#include "runtime_asan.js"
#endif
#if SUPPORT_BASE64_EMBEDDING || FORCE_FILESYSTEM
#include "base64Utils.js"
#endif
// Wasm globals
var wasmMemory;
#if SHARED_MEMORY
// For sending to workers.
var wasmModule;
#endif // SHARED_MEMORY
//========================================
// Runtime essentials
//========================================
// whether we are quitting the application. no code should run after this.
// set in exit() and abort()
var ABORT = false;
// set by exit() and abort(). Passed to 'onExit' handler.
// NOTE: This is also used as the process return code code in shell environments
// but only when noExitRuntime is false.
var EXITSTATUS;
#if ASSERTIONS || !STRICT
// In STRICT mode, we only define assert() when ASSERTIONS is set. i.e. we
// don't define it at all in release modes. This matches the behaviour of
// MINIMAL_RUNTIME.
// TODO(sbc): Make this the default even without STRICT enabled.
/** @type {function(*, string=)} */
function assert(condition, text) {
if (!condition) {
#if ASSERTIONS
abort('Assertion failed' + (text ? ': ' + text : ''));
#else
// This build was created without ASSERTIONS defined. `assert()` should not
// ever be called in this configuration but in case there are callers in
// the wild leave this simple abort() implementation here for now.
abort(text);
#endif
}
}
#endif
#if ASSERTIONS
// We used to include malloc/free by default in the past. Show a helpful error in
// builds with assertions.
#if !hasExportedSymbol('malloc')
function _malloc() {
abort('malloc() called but not included in the build - add `_malloc` to EXPORTED_FUNCTIONS');
}
#endif // malloc
#if !hasExportedSymbol('free')
function _free() {
// Show a helpful error since we used to include free by default in the past.
abort('free() called but not included in the build - add `_free` to EXPORTED_FUNCTIONS');
}
#endif // free
#endif // ASSERTIONS
// Memory management
var HEAP,
/** @type {!Int8Array} */
HEAP8,
/** @type {!Uint8Array} */
HEAPU8,
/** @type {!Int16Array} */
HEAP16,
/** @type {!Uint16Array} */
HEAPU16,
/** @type {!Int32Array} */
HEAP32,
/** @type {!Uint32Array} */
HEAPU32,
/** @type {!Float32Array} */
HEAPF32,
#if WASM_BIGINT
/* BigInt64Array type is not correctly defined in closure
/** not-@type {!BigInt64Array} */
HEAP64,
/* BigUInt64Array type is not correctly defined in closure
/** not-t@type {!BigUint64Array} */
HEAPU64,
#endif
/** @type {!Float64Array} */
HEAPF64;
#if SUPPORT_BIG_ENDIAN
var HEAP_DATA_VIEW;
#endif
#include "runtime_shared.js"
#if ASSERTIONS
assert(!Module['STACK_SIZE'], 'STACK_SIZE can no longer be set at runtime. Use -sSTACK_SIZE at link time')
#endif
#if ASSERTIONS
assert(typeof Int32Array != 'undefined' && typeof Float64Array !== 'undefined' && Int32Array.prototype.subarray != undefined && Int32Array.prototype.set != undefined,
'JS engine does not provide full typed array support');
#endif
#if IMPORTED_MEMORY
// In non-standalone/normal mode, we create the memory here.
#include "runtime_init_memory.js"
#elif ASSERTIONS
// If memory is defined in wasm, the user can't provide it, or set INITIAL_MEMORY
assert(!Module['wasmMemory'], 'Use of `wasmMemory` detected. Use -sIMPORTED_MEMORY to define wasmMemory externally');
assert(!Module['INITIAL_MEMORY'], 'Detected runtime INITIAL_MEMORY setting. Use -sIMPORTED_MEMORY to define wasmMemory dynamically');
#endif // !IMPORTED_MEMORY && ASSERTIONS
#include "runtime_stack_check.js"
#include "runtime_assertions.js"
var __ATPRERUN__ = []; // functions called before the runtime is initialized
var __ATINIT__ = []; // functions called during startup
#if HAS_MAIN
var __ATMAIN__ = []; // functions called when main() is to be run
#endif
var __ATEXIT__ = []; // functions called during shutdown
var __ATPOSTRUN__ = []; // functions called after the main() is called
#if RELOCATABLE
var __RELOC_FUNCS__ = [];
#endif
var runtimeInitialized = false;
#if EXIT_RUNTIME
var runtimeExited = false;
#endif
function preRun() {
#if ASSERTIONS && PTHREADS
assert(!ENVIRONMENT_IS_PTHREAD); // PThreads reuse the runtime from the main thread.
#endif
#if expectToReceiveOnModule('preRun')
if (Module['preRun']) {
if (typeof Module['preRun'] == 'function') Module['preRun'] = [Module['preRun']];
while (Module['preRun'].length) {
addOnPreRun(Module['preRun'].shift());
}
}
#endif
callRuntimeCallbacks(__ATPRERUN__);
}
function initRuntime() {
#if RUNTIME_DEBUG
dbg('initRuntime');
#endif
#if ASSERTIONS
assert(!runtimeInitialized);
#endif
runtimeInitialized = true;
#if WASM_WORKERS
if (ENVIRONMENT_IS_WASM_WORKER) return _wasmWorkerInitializeRuntime();
#endif
#if PTHREADS
if (ENVIRONMENT_IS_PTHREAD) return;
#endif
#if STACK_OVERFLOW_CHECK
checkStackCookie();
#endif
#if STACK_OVERFLOW_CHECK >= 2
setStackLimits();
#endif
#if RELOCATABLE
callRuntimeCallbacks(__RELOC_FUNCS__);
#endif
<<< ATINITS >>>
callRuntimeCallbacks(__ATINIT__);
}
#if HAS_MAIN
function preMain() {
#if STACK_OVERFLOW_CHECK
checkStackCookie();
#endif
#if PTHREADS
if (ENVIRONMENT_IS_PTHREAD) return; // PThreads reuse the runtime from the main thread.
#endif
<<< ATMAINS >>>
callRuntimeCallbacks(__ATMAIN__);
}
#endif
#if EXIT_RUNTIME
function exitRuntime() {
#if RUNTIME_DEBUG
dbg('exitRuntime');
#endif
#if ASSERTIONS
assert(!runtimeExited);
#endif
#if ASYNCIFY == 1 && ASSERTIONS
// ASYNCIFY cannot be used once the runtime starts shutting down.
Asyncify.state = Asyncify.State.Disabled;
#endif
#if STACK_OVERFLOW_CHECK
checkStackCookie();
#endif
#if PTHREADS
if (ENVIRONMENT_IS_PTHREAD) return; // PThreads reuse the runtime from the main thread.
#endif
#if !STANDALONE_WASM
___funcs_on_exit(); // Native atexit() functions
#endif
callRuntimeCallbacks(__ATEXIT__);
<<< ATEXITS >>>
#if PTHREADS
PThread.terminateAllThreads();
#endif
runtimeExited = true;
}
#endif
function postRun() {
#if STACK_OVERFLOW_CHECK
checkStackCookie();
#endif
#if PTHREADS
if (ENVIRONMENT_IS_PTHREAD) return; // PThreads reuse the runtime from the main thread.
#endif
#if expectToReceiveOnModule('postRun')
if (Module['postRun']) {
if (typeof Module['postRun'] == 'function') Module['postRun'] = [Module['postRun']];
while (Module['postRun'].length) {
addOnPostRun(Module['postRun'].shift());
}
}
#endif
callRuntimeCallbacks(__ATPOSTRUN__);
}
function addOnPreRun(cb) {
__ATPRERUN__.unshift(cb);
}
function addOnInit(cb) {
__ATINIT__.unshift(cb);
}
#if HAS_MAIN
function addOnPreMain(cb) {
__ATMAIN__.unshift(cb);
}
#endif
function addOnExit(cb) {
#if EXIT_RUNTIME
__ATEXIT__.unshift(cb);
#endif
}
function addOnPostRun(cb) {
__ATPOSTRUN__.unshift(cb);
}
#include "runtime_math.js"
// A counter of dependencies for calling run(). If we need to
// do asynchronous work before running, increment this and
// decrement it. Incrementing must happen in a place like
// Module.preRun (used by emcc to add file preloading).
// Note that you can add dependencies in preRun, even though
// it happens right before run - run will be postponed until
// the dependencies are met.
var runDependencies = 0;
var runDependencyWatcher = null;
var dependenciesFulfilled = null; // overridden to take different actions when all run dependencies are fulfilled
#if ASSERTIONS
var runDependencyTracking = {};
#endif
function getUniqueRunDependency(id) {
#if ASSERTIONS
var orig = id;
while (1) {
if (!runDependencyTracking[id]) return id;
id = orig + Math.random();
}
#else
return id;
#endif
}
function addRunDependency(id) {
runDependencies++;
#if expectToReceiveOnModule('monitorRunDependencies')
Module['monitorRunDependencies']?.(runDependencies);
#endif
#if ASSERTIONS
if (id) {
assert(!runDependencyTracking[id]);
runDependencyTracking[id] = 1;
if (runDependencyWatcher === null && typeof setInterval != 'undefined') {
// Check for missing dependencies every few seconds
runDependencyWatcher = setInterval(() => {
if (ABORT) {
clearInterval(runDependencyWatcher);
runDependencyWatcher = null;
return;
}
var shown = false;
for (var dep in runDependencyTracking) {
if (!shown) {
shown = true;
err('still waiting on run dependencies:');
}
err(`dependency: ${dep}`);
}
if (shown) {
err('(end of list)');
}
}, 10000);
}
} else {
err('warning: run dependency added without ID');
}
#endif
}
function removeRunDependency(id) {
runDependencies--;
#if expectToReceiveOnModule('monitorRunDependencies')
Module['monitorRunDependencies']?.(runDependencies);
#endif
#if ASSERTIONS
if (id) {
assert(runDependencyTracking[id]);
delete runDependencyTracking[id];
} else {
err('warning: run dependency removed without ID');
}
#endif
if (runDependencies == 0) {
if (runDependencyWatcher !== null) {
clearInterval(runDependencyWatcher);
runDependencyWatcher = null;
}
if (dependenciesFulfilled) {
var callback = dependenciesFulfilled;
dependenciesFulfilled = null;
callback(); // can add another dependenciesFulfilled
}
}
}
/** @param {string|number=} what */
function abort(what) {
#if expectToReceiveOnModule('onAbort')
Module['onAbort']?.(what);
#endif
what = 'Aborted(' + what + ')';
// TODO(sbc): Should we remove printing and leave it up to whoever
// catches the exception?
err(what);
ABORT = true;
EXITSTATUS = 1;
#if ASSERTIONS == 0
what += '. Build with -sASSERTIONS for more info.';
#elif ASYNCIFY == 1
if (what.indexOf('RuntimeError: unreachable') >= 0) {
what += '. "unreachable" may be due to ASYNCIFY_STACK_SIZE not being large enough (try increasing it)';
}
#endif // ASSERTIONS
// Use a wasm runtime error, because a JS error might be seen as a foreign
// exception, which means we'd run destructors on it. We need the error to
// simply make the program stop.
// FIXME This approach does not work in Wasm EH because it currently does not assume
// all RuntimeErrors are from traps; it decides whether a RuntimeError is from
// a trap or not based on a hidden field within the object. So at the moment
// we don't have a way of throwing a wasm trap from JS. TODO Make a JS API that
// allows this in the wasm spec.
// Suppress closure compiler warning here. Closure compiler's builtin extern
// definition for WebAssembly.RuntimeError claims it takes no arguments even
// though it can.
// TODO(https://github.com/google/closure-compiler/pull/3913): Remove if/when upstream closure gets fixed.
#if WASM_EXCEPTIONS == 1
// See above, in the meantime, we resort to wasm code for trapping.
//
// In case abort() is called before the module is initialized, wasmExports
// and its exported '__trap' function is not available, in which case we throw
// a RuntimeError.
//
// We trap instead of throwing RuntimeError to prevent infinite-looping in
// Wasm EH code (because RuntimeError is considered as a foreign exception and
// caught by 'catch_all'), but in case throwing RuntimeError is fine because
// the module has not even been instantiated, even less running.
if (runtimeInitialized) {
___trap();
}
#endif
/** @suppress {checkTypes} */
var e = new WebAssembly.RuntimeError(what);
#if MODULARIZE
readyPromiseReject(e);
#endif
// Throw the error whether or not MODULARIZE is set because abort is used
// in code paths apart from instantiation where an exception is expected
// to be thrown when abort is called.
throw e;
}
#include "memoryprofiler.js"
#if ASSERTIONS && !('$FS' in addedLibraryItems)
// show errors on likely calls to FS when it was not included
var FS = {
error() {
abort('Filesystem support (FS) was not included. The problem is that you are using files from JS, but files were not used from C/C++, so filesystem support was not auto-included. You can force-include filesystem support with -sFORCE_FILESYSTEM');
},
init() { FS.error() },
createDataFile() { FS.error() },
createPreloadedFile() { FS.error() },
createLazyFile() { FS.error() },
open() { FS.error() },
mkdev() { FS.error() },
registerDevice() { FS.error() },
analyzePath() { FS.error() },
ErrnoError() { FS.error() },
};
Module['FS_createDataFile'] = FS.createDataFile;
Module['FS_createPreloadedFile'] = FS.createPreloadedFile;
#endif
#include "URIUtils.js"
#if ASSERTIONS
function createExportWrapper(name, nargs) {
return (...args) => {
assert(runtimeInitialized, `native function \`${name}\` called before runtime initialization`);
#if EXIT_RUNTIME
assert(!runtimeExited, `native function \`${name}\` called after runtime exit (use NO_EXIT_RUNTIME to keep it alive after main() exits)`);
#endif
var f = wasmExports[name];
assert(f, `exported native function \`${name}\` not found`);
// Only assert for too many arguments. Too few can be valid since the missing arguments will be zero filled.
assert(args.length <= nargs, `native function \`${name}\` called with ${args.length} args but expects ${nargs}`);
return f(...args);
};
}
#endif
#include "runtime_exceptions.js"
#if ABORT_ON_WASM_EXCEPTIONS
// `abortWrapperDepth` counts the recursion level of the wrapper function so
// that we only handle exceptions at the top level letting the exception
// mechanics work uninterrupted at the inner level. Additionally,
// `abortWrapperDepth` is also manually incremented in callMain so that we know
// to ignore exceptions from there since they're handled by callMain directly.
var abortWrapperDepth = 0;
// Creates a wrapper in a closure so that each wrapper gets it's own copy of 'original'
function makeAbortWrapper(original) {
return (...args) => {
// Don't allow this function to be called if we're aborted!
if (ABORT) {
throw "program has already aborted!";
}
abortWrapperDepth += 1;
try {
return original(...args);
} catch (e) {
if (
ABORT // rethrow exception if abort() was called in the original function call above
|| abortWrapperDepth > 1 // rethrow exceptions not caught at the top level if exception catching is enabled; rethrow from exceptions from within callMain
#if SUPPORT_LONGJMP == 'emscripten' // Rethrow longjmp if enabled
#if EXCEPTION_STACK_TRACES
|| e instanceof EmscriptenSjLj // EXCEPTION_STACK_TRACES=1 will throw an instance of EmscriptenSjLj
#else
|| e === Infinity // EXCEPTION_STACK_TRACES=0 will throw Infinity
#endif // EXCEPTION_STACK_TRACES
#endif
|| e === 'unwind'
) {
throw e;
}
abort("unhandled exception: " + [e, e.stack]);
}
finally {
abortWrapperDepth -= 1;
}
}
}
// Instrument all the exported functions to:
// - abort if an unhandled exception occurs
// - throw an exception if someone tries to call them after the program has aborted
// See settings.ABORT_ON_WASM_EXCEPTIONS for more info.
function instrumentWasmExportsWithAbort(exports) {
// Override the exported functions with the wrappers and copy over any other symbols
var instExports = {};
for (var name in exports) {
var original = exports[name];
if (typeof original == 'function') {
instExports[name] = makeAbortWrapper(original);
} else {
instExports[name] = original;
}
}
return instExports;
}
function instrumentWasmTableWithAbort() {
// Override the wasmTable get function to return the wrappers
var realGet = wasmTable.get;
var wrapperCache = {};
wasmTable.get = (i) => {
var func = realGet.call(wasmTable, i);
var cached = wrapperCache[i];
if (!cached || cached.func !== func) {
cached = wrapperCache[i] = {
func,
wrapper: makeAbortWrapper(func)
}
}
return cached.wrapper;
};
}
#endif
function findWasmBinary() {
#if EXPORT_ES6 && USE_ES6_IMPORT_META && !SINGLE_FILE && !AUDIO_WORKLET
if (Module['locateFile']) {
#endif
var f = '{{{ WASM_BINARY_FILE }}}';
#if !SINGLE_FILE
if (!isDataURI(f)) {
return locateFile(f);
}
#endif
return f;
#if EXPORT_ES6 && USE_ES6_IMPORT_META && !SINGLE_FILE && !AUDIO_WORKLET // In single-file mode, repeating WASM_BINARY_FILE would emit the contents again. For an Audio Worklet, we cannot use `new URL()`.
}
#if ENVIRONMENT_MAY_BE_SHELL
if (ENVIRONMENT_IS_SHELL)
return '{{{ WASM_BINARY_FILE }}}';
#endif
// Use bundler-friendly `new URL(..., import.meta.url)` pattern; works in browsers too.
return new URL('{{{ WASM_BINARY_FILE }}}', import.meta.url).href;
#endif
}
var wasmBinaryFile;
function getBinarySync(file) {
if (file == wasmBinaryFile && wasmBinary) {
return new Uint8Array(wasmBinary);
}
#if SUPPORT_BASE64_EMBEDDING
var binary = tryParseAsDataURI(file);
if (binary) {
return binary;
}
#endif
if (readBinary) {
return readBinary(file);
}
#if WASM_ASYNC_COMPILATION
throw 'both async and sync fetching of the wasm failed';
#else
throw 'sync fetching of the wasm failed: you can preload it to Module["wasmBinary"] manually, or emcc.py will do that for you when generating HTML (but not JS)';
#endif
}
function getBinaryPromise(binaryFile) {
#if !SINGLE_FILE
// If we don't have the binary yet, load it asynchronously using readAsync.
if (!wasmBinary
#if SUPPORT_BASE64_EMBEDDING
|| isDataURI(binaryFile)
#endif
) {
// Fetch the binary using readAsync
return readAsync(binaryFile).then(
(response) => new Uint8Array(/** @type{!ArrayBuffer} */(response)),
// Fall back to getBinarySync if readAsync fails
() => getBinarySync(binaryFile)
);
}
#endif
// Otherwise, getBinarySync should be able to get it synchronously
return Promise.resolve().then(() => getBinarySync(binaryFile));
}
#if LOAD_SOURCE_MAP
var wasmSourceMap;
#include "source_map_support.js"
#endif
#if USE_OFFSET_CONVERTER
var wasmOffsetConverter;
#include "wasm_offset_converter.js"
#endif
#if SPLIT_MODULE
{{{ makeModuleReceiveWithVar('loadSplitModule', undefined, 'instantiateSync', true) }}}
var splitModuleProxyHandler = {
get(target, prop, receiver) {
return (...args) => {
#if ASYNCIFY == 2
throw new Error('Placeholder function "' + prop + '" should not be called when using JSPI.');
#else
err(`placeholder function called: ${prop}`);
var imports = {'primary': wasmExports};
// Replace '.wasm' suffix with '.deferred.wasm'.
var deferred = wasmBinaryFile.slice(0, -5) + '.deferred.wasm'
loadSplitModule(deferred, imports, prop);
err('instantiated deferred module, continuing');
#if RELOCATABLE
// When the table is dynamically laid out, the placeholder functions names
// are offsets from the table base. In the main module, the table base is
// always 1.
return wasmTable.get(1 + parseInt(prop))(...args);
#else
return wasmTable.get(prop)(...args);
#endif
#endif
}
}
};
#endif
#if LOAD_SOURCE_MAP
function receiveSourceMapJSON(sourceMap) {
wasmSourceMap = new WasmSourceMap(sourceMap);
{{{ runIfMainThread("removeRunDependency('source-map');") }}}
}
#endif
#if SPLIT_MODULE || !WASM_ASYNC_COMPILATION
function instantiateSync(file, info) {
var module;
var binary = getBinarySync(file);
#if NODE_CODE_CACHING
if (ENVIRONMENT_IS_NODE) {
var v8 = require('v8');
// Include the V8 version in the cache name, so that we don't try to
// load cached code from another version, which fails silently (it seems
// to load ok, but we do actually recompile the binary every time).
var cachedCodeFile = '{{{ WASM_BINARY_FILE }}}.' + v8.cachedDataVersionTag() + '.cached';
cachedCodeFile = locateFile(cachedCodeFile);
var hasCached = fs.existsSync(cachedCodeFile);
if (hasCached) {
#if RUNTIME_DEBUG
dbg('NODE_CODE_CACHING: loading module');
#endif
try {
module = v8.deserialize(fs.readFileSync(cachedCodeFile));
} catch (e) {
err(`NODE_CODE_CACHING: failed to deserialize, bad cache file? (${cachedCodeFile})`);
// Save the new compiled code when we have it.
hasCached = false;
}
}
}
module ||= new WebAssembly.Module(binary);
if (ENVIRONMENT_IS_NODE && !hasCached) {
#if RUNTIME_DEBUG
dbg('NODE_CODE_CACHING: saving module');
#endif
fs.writeFileSync(cachedCodeFile, v8.serialize(module));
}
#else // NODE_CODE_CACHING
module = new WebAssembly.Module(binary);
#endif // NODE_CODE_CACHING
var instance = new WebAssembly.Instance(module, info);
#if USE_OFFSET_CONVERTER
wasmOffsetConverter = new WasmOffsetConverter(binary, module);
#endif
#if LOAD_SOURCE_MAP
receiveSourceMapJSON(getSourceMap());
#endif
return [instance, module];
}
#endif
#if (PTHREADS || WASM_WORKERS) && (LOAD_SOURCE_MAP || USE_OFFSET_CONVERTER)
// When using postMessage to send an object, it is processed by the structured
// clone algorithm. The prototype, and hence methods, on that object is then
// lost. This function adds back the lost prototype. This does not work with
// nested objects that has prototypes, but it suffices for WasmSourceMap and
// WasmOffsetConverter.
function resetPrototype(constructor, attrs) {
var object = Object.create(constructor.prototype);
return Object.assign(object, attrs);
}
#endif
#if WASM_ASYNC_COMPILATION
function instantiateArrayBuffer(binaryFile, imports, receiver) {
#if USE_OFFSET_CONVERTER
var savedBinary;
#endif
return getBinaryPromise(binaryFile).then((binary) => {
#if USE_OFFSET_CONVERTER
savedBinary = binary;
#endif
return WebAssembly.instantiate(binary, imports);
#if USE_OFFSET_CONVERTER
}).then((instance) => {
// wasmOffsetConverter needs to be assigned before calling the receiver
// (receiveInstantiationResult). See comments below in instantiateAsync.
wasmOffsetConverter = new WasmOffsetConverter(savedBinary, instance.module);
return instance;
#endif
}).then(receiver, (reason) => {
err(`failed to asynchronously prepare wasm: ${reason}`);
#if WASM == 2
#if ENVIRONMENT_MAY_BE_NODE || ENVIRONMENT_MAY_BE_SHELL
if (typeof location != 'undefined') {
#endif
// WebAssembly compilation failed, try running the JS fallback instead.
var search = location.search;
if (search.indexOf('_rwasm=0') < 0) {
location.href += (search ? search + '&' : '?') + '_rwasm=0';
// Return here to avoid calling abort() below. The application
// still has a chance to start successfully do we don't want to
// trigger onAbort or onExit handlers.
return;
}
#if ENVIRONMENT_MAY_BE_NODE || ENVIRONMENT_MAY_BE_SHELL
}
#endif
#endif // WASM == 2
#if ASSERTIONS
// Warn on some common problems.
if (isFileURI(wasmBinaryFile)) {
err(`warning: Loading from a file URI (${wasmBinaryFile}) is not supported in most browsers. See https://emscripten.org/docs/getting_started/FAQ.html#how-do-i-run-a-local-webserver-for-testing-why-does-my-program-stall-in-downloading-or-preparing`);
}
#endif
abort(reason);
});
}
function instantiateAsync(binary, binaryFile, imports, callback) {
#if !SINGLE_FILE
if (!binary &&
typeof WebAssembly.instantiateStreaming == 'function' &&
!isDataURI(binaryFile) &&
#if ENVIRONMENT_MAY_BE_WEBVIEW
// Don't use streaming for file:// delivered objects in a webview, fetch them synchronously.
!isFileURI(binaryFile) &&
#endif
#if ENVIRONMENT_MAY_BE_NODE
// Avoid instantiateStreaming() on Node.js environment for now, as while
// Node.js v18.1.0 implements it, it does not have a full fetch()
// implementation yet.
//
// Reference:
// https://github.com/emscripten-core/emscripten/pull/16917
!ENVIRONMENT_IS_NODE &&
#endif
typeof fetch == 'function') {
return fetch(binaryFile, {{{ makeModuleReceiveExpr('fetchSettings', "{ credentials: 'same-origin' }") }}}).then((response) => {
// Suppress closure warning here since the upstream definition for
// instantiateStreaming only allows Promise<Repsponse> rather than
// an actual Response.
// TODO(https://github.com/google/closure-compiler/pull/3913): Remove if/when upstream closure is fixed.
/** @suppress {checkTypes} */
var result = WebAssembly.instantiateStreaming(response, imports);
#if USE_OFFSET_CONVERTER
// We need the wasm binary for the offset converter. Clone the response
// in order to get its arrayBuffer (cloning should be more efficient
// than doing another entire request).
// (We must clone the response now in order to use it later, as if we
// try to clone it asynchronously lower down then we will get a
// "response was already consumed" error.)
var clonedResponsePromise = response.clone().arrayBuffer();
#endif
return result.then(
#if !USE_OFFSET_CONVERTER
callback,
#else
function(instantiationResult) {
// When using the offset converter, we must interpose here. First,
// the instantiation result must arrive (if it fails, the error
// handling later down will handle it). Once it arrives, we can
// initialize the offset converter. And only then is it valid to
// call receiveInstantiationResult, as that function will use the
// offset converter (in the case of pthreads, it will create the
// pthreads and send them the offsets along with the wasm instance).
clonedResponsePromise.then((arrayBufferResult) => {
wasmOffsetConverter = new WasmOffsetConverter(new Uint8Array(arrayBufferResult), instantiationResult.module);
callback(instantiationResult);
},
(reason) => err(`failed to initialize offset-converter: ${reason}`)
);
},
#endif
function(reason) {
// We expect the most common failure cause to be a bad MIME type for the binary,
// in which case falling back to ArrayBuffer instantiation should work.
err(`wasm streaming compile failed: ${reason}`);
err('falling back to ArrayBuffer instantiation');
return instantiateArrayBuffer(binaryFile, imports, callback);
});
});
}
#endif
return instantiateArrayBuffer(binaryFile, imports, callback);
}
#endif // WASM_ASYNC_COMPILATION
function getWasmImports() {
#if PTHREADS
assignWasmImports();
#endif
#if ASYNCIFY && (ASSERTIONS || ASYNCIFY == 2)
// instrumenting imports is used in asyncify in two ways: to add assertions
// that check for proper import use, and for ASYNCIFY=2 we use them to set up
// the Promise API on the import side.
#if PTHREADS || ASYNCIFY_LAZY_LOAD_CODE
// In pthreads builds getWasmImports is called more than once but we only
// and the instrument the imports once.
if (!wasmImports.__instrumented) {
wasmImports.__instrumented = true;
Asyncify.instrumentWasmImports(wasmImports);
}
#else
Asyncify.instrumentWasmImports(wasmImports);
#endif
#endif
// prepare imports
return {
#if MINIFY_WASM_IMPORTED_MODULES
'a': wasmImports,
#else // MINIFY_WASM_IMPORTED_MODULES
'env': wasmImports,
'{{{ WASI_MODULE_NAME }}}': wasmImports,
#endif // MINIFY_WASM_IMPORTED_MODULES
#if SPLIT_MODULE
'placeholder': new Proxy({}, splitModuleProxyHandler),
#endif
#if RELOCATABLE
'GOT.mem': new Proxy(wasmImports, GOTHandler),
'GOT.func': new Proxy(wasmImports, GOTHandler),
#endif
}
}
// Create the wasm instance.
// Receives the wasm imports, returns the exports.
function createWasm() {
var info = getWasmImports();
// Load the wasm module and create an instance of using native support in the JS engine.
// handle a generated wasm instance, receiving its exports and
// performing other necessary setup
/** @param {WebAssembly.Module=} module*/
function receiveInstance(instance, module) {
wasmExports = instance.exports;
#if RELOCATABLE
wasmExports = relocateExports(wasmExports, {{{ GLOBAL_BASE }}});
#endif
#if ASYNCIFY
wasmExports = Asyncify.instrumentWasmExports(wasmExports);
#endif
#if ABORT_ON_WASM_EXCEPTIONS
wasmExports = instrumentWasmExportsWithAbort(wasmExports);
#endif
#if MAIN_MODULE
var metadata = getDylinkMetadata(module);
#if AUTOLOAD_DYLIBS
if (metadata.neededDynlibs) {
dynamicLibraries = metadata.neededDynlibs.concat(dynamicLibraries);
}
#endif
mergeLibSymbols(wasmExports, 'main')
#if '$LDSO' in addedLibraryItems
LDSO.init();
#endif
loadDylibs();
#elif RELOCATABLE
reportUndefinedSymbols();
#endif
#if MEMORY64 || CAN_ADDRESS_2GB
wasmExports = applySignatureConversions(wasmExports);
#endif
{{{ receivedSymbol('wasmExports') }}}
#if PTHREADS
#if MAIN_MODULE
registerTLSInit(wasmExports['_emscripten_tls_init'], instance.exports, metadata);
#else
registerTLSInit(wasmExports['_emscripten_tls_init']);
#endif
#endif
#if !IMPORTED_MEMORY
wasmMemory = wasmExports['memory'];
{{{ receivedSymbol('wasmMemory') }}}
#if ASSERTIONS
assert(wasmMemory, 'memory not found in wasm exports');
#endif
updateMemoryViews();
#endif
#if '$wasmTable' in addedLibraryItems && !RELOCATABLE
wasmTable = wasmExports['__indirect_function_table'];
{{{ receivedSymbol('wasmTable') }}}
#if ASSERTIONS && !PURE_WASI
assert(wasmTable, 'table not found in wasm exports');
#endif
#endif
#if hasExportedSymbol('__wasm_call_ctors')
addOnInit(wasmExports['__wasm_call_ctors']);
#endif
#if hasExportedSymbol('__wasm_apply_data_relocs')
__RELOC_FUNCS__.push(wasmExports['__wasm_apply_data_relocs']);