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preamble.js
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/**
* @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 BENCHMARK
Module.realPrint = out;
out = err = function(){};
#endif
{{{ makeModuleReceiveWithVar('wasmBinary') }}}
{{{ makeModuleReceiveWithVar('noExitRuntime') }}}
#if WASM != 2 && MAYBE_WASM2JS
#if !WASM2JS
if (Module['doWasm2JS']) {
#endif
#include "wasm2js.js"
#if !WASM2JS
}
#endif
#endif
#if WASM == 1
if (typeof WebAssembly !== 'object') {
abort('no native wasm support detected');
}
#endif
#include "runtime_safe_heap.js"
// Wasm globals
var wasmMemory;
#if USE_PTHREADS
// For sending to workers.
var wasmModule;
#endif // USE_PTHREADS
//========================================
// 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;
/** @type {function(*, string=)} */
function assert(condition, text) {
if (!condition) {
abort('Assertion failed: ' + text);
}
}
// Returns the C function with a specified identifier (for C++, you need to do manual name mangling)
function getCFunc(ident) {
var func = Module['_' + ident]; // closure exported function
assert(func, 'Cannot call unknown function ' + ident + ', make sure it is exported');
return func;
}
// C calling interface.
/** @param {string|null=} returnType
@param {Array=} argTypes
@param {Arguments|Array=} args
@param {Object=} opts */
function ccall(ident, returnType, argTypes, args, opts) {
// For fast lookup of conversion functions
var toC = {
'string': function(str) {
var ret = 0;
if (str !== null && str !== undefined && str !== 0) { // null string
// at most 4 bytes per UTF-8 code point, +1 for the trailing '\0'
var len = (str.length << 2) + 1;
ret = stackAlloc(len);
stringToUTF8(str, ret, len);
}
return ret;
},
'array': function(arr) {
var ret = stackAlloc(arr.length);
writeArrayToMemory(arr, ret);
return ret;
}
};
function convertReturnValue(ret) {
if (returnType === 'string') return UTF8ToString(ret);
if (returnType === 'boolean') return Boolean(ret);
return ret;
}
var func = getCFunc(ident);
var cArgs = [];
var stack = 0;
#if ASSERTIONS
assert(returnType !== 'array', 'Return type should not be "array".');
#endif
if (args) {
for (var i = 0; i < args.length; i++) {
var converter = toC[argTypes[i]];
if (converter) {
if (stack === 0) stack = stackSave();
cArgs[i] = converter(args[i]);
} else {
cArgs[i] = args[i];
}
}
}
var ret = func.apply(null, cArgs);
#if ASYNCIFY
var asyncMode = opts && opts.async;
var runningAsync = typeof Asyncify === 'object' && Asyncify.currData;
var prevRunningAsync = typeof Asyncify === 'object' && Asyncify.asyncFinalizers.length > 0;
#if ASSERTIONS
assert(!asyncMode || !prevRunningAsync, 'Cannot have multiple async ccalls in flight at once');
#endif
// Check if we started an async operation just now.
if (runningAsync && !prevRunningAsync) {
// If so, the WASM function ran asynchronous and unwound its stack.
// We need to return a Promise that resolves the return value
// once the stack is rewound and execution finishes.
#if ASSERTIONS
assert(asyncMode, 'The call to ' + ident + ' is running asynchronously. If this was intended, add the async option to the ccall/cwrap call.');
#endif
return new Promise(function(resolve) {
Asyncify.asyncFinalizers.push(function(ret) {
if (stack !== 0) stackRestore(stack);
resolve(convertReturnValue(ret));
});
});
}
#endif
ret = convertReturnValue(ret);
if (stack !== 0) stackRestore(stack);
#if ASYNCIFY
// If this is an async ccall, ensure we return a promise
if (opts && opts.async) return Promise.resolve(ret);
#endif
return ret;
}
/** @param {string=} returnType
@param {Array=} argTypes
@param {Object=} opts */
function cwrap(ident, returnType, argTypes, opts) {
#if !ASSERTIONS
argTypes = argTypes || [];
// When the function takes numbers and returns a number, we can just return
// the original function
var numericArgs = argTypes.every(function(type){ return type === 'number'});
var numericRet = returnType !== 'string';
if (numericRet && numericArgs && !opts) {
return getCFunc(ident);
}
#endif
return function() {
return ccall(ident, returnType, argTypes, arguments, opts);
}
}
#if ASSERTIONS
// We used to include malloc/free by default in the past. Show a helpful error in
// builds with assertions.
#if !('_malloc' in IMPLEMENTED_FUNCTIONS)
function _malloc() {
abort("malloc() called but not included in the build - add '_malloc' to EXPORTED_FUNCTIONS");
}
#endif // malloc
#if !('_free' in IMPLEMENTED_FUNCTIONS)
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
var ALLOC_NORMAL = 0; // Tries to use _malloc()
var ALLOC_STACK = 1; // Lives for the duration of the current function call
// allocate(): This is for internal use. You can use it yourself as well, but the interface
// is a little tricky (see docs right below). The reason is that it is optimized
// for multiple syntaxes to save space in generated code. So you should
// normally not use allocate(), and instead allocate memory using _malloc(),
// initialize it with setValue(), and so forth.
// @slab: An array of data.
// @allocator: How to allocate memory, see ALLOC_*
/** @type {function((Uint8Array|Array<number>), number)} */
function allocate(slab, allocator) {
var ret;
#if ASSERTIONS
assert(typeof allocator === 'number', 'allocate no longer takes a type argument')
assert(typeof slab !== 'number', 'allocate no longer takes a number as arg0')
#endif
if (allocator == ALLOC_STACK) {
#if DECLARE_ASM_MODULE_EXPORTS
ret = stackAlloc(slab.length);
#else
ret = (typeof stackAlloc !== 'undefined' ? stackAlloc : null)(slab.length);
#endif
} else {
ret = {{{ makeMalloc('allocate', 'slab.length') }}};
}
if (slab.subarray || slab.slice) {
HEAPU8.set(/** @type {!Uint8Array} */(slab), ret);
} else {
HEAPU8.set(new Uint8Array(slab), ret);
}
return ret;
}
#include "runtime_strings.js"
#include "runtime_strings_extra.js"
// Memory management
function alignUp(x, multiple) {
if (x % multiple > 0) {
x += multiple - (x % multiple);
}
return x;
}
var HEAP,
/** @type {ArrayBuffer} */
buffer,
/** @type {Int8Array} */
HEAP8,
/** @type {Uint8Array} */
HEAPU8,
/** @type {Int16Array} */
HEAP16,
/** @type {Uint16Array} */
HEAPU16,
/** @type {Int32Array} */
HEAP32,
/** @type {Uint32Array} */
HEAPU32,
/** @type {Float32Array} */
HEAPF32,
/** @type {Float64Array} */
HEAPF64;
#if WASM_BIGINT
var HEAP64;
#endif
function updateGlobalBufferAndViews(buf) {
buffer = buf;
Module['HEAP8'] = HEAP8 = new Int8Array(buf);
Module['HEAP16'] = HEAP16 = new Int16Array(buf);
Module['HEAP32'] = HEAP32 = new Int32Array(buf);
Module['HEAPU8'] = HEAPU8 = new Uint8Array(buf);
Module['HEAPU16'] = HEAPU16 = new Uint16Array(buf);
Module['HEAPU32'] = HEAPU32 = new Uint32Array(buf);
Module['HEAPF32'] = HEAPF32 = new Float32Array(buf);
Module['HEAPF64'] = HEAPF64 = new Float64Array(buf);
#if WASM_BIGINT
Module['HEAP64'] = HEAP64 = new BigInt64Array(buf);
#endif
}
#if RELOCATABLE
var __stack_pointer = new WebAssembly.Global({value: 'i32', mutable: true}, {{{ getQuoted('STACK_BASE') }}});
// To support such allocations during startup, track them on __heap_base and
// then when the main module is loaded it reads that value and uses it to
// initialize sbrk (the main module is relocatable itself, and so it does not
// have __heap_base hardcoded into it - it receives it from JS as an extern
// global, basically).
Module['___heap_base'] = {{{ getQuoted('HEAP_BASE') }}};
#endif // RELOCATABLE
var TOTAL_STACK = {{{ TOTAL_STACK }}};
#if ASSERTIONS
if (Module['TOTAL_STACK']) assert(TOTAL_STACK === Module['TOTAL_STACK'], 'the stack size can no longer be determined at runtime')
#endif
{{{ makeModuleReceiveWithVar('INITIAL_MEMORY', 'INITIAL_MEMORY', INITIAL_MEMORY) }}}
#if ASSERTIONS
assert(INITIAL_MEMORY >= TOTAL_STACK, 'INITIAL_MEMORY should be larger than TOTAL_STACK, was ' + INITIAL_MEMORY + '! (TOTAL_STACK=' + TOTAL_STACK + ')');
// check for full engine support (use string 'subarray' to avoid closure compiler confusion)
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 IN_TEST_HARNESS
// Test runs in browsers should always be free from uncaught exceptions. If an uncaught exception is thrown, we fail browser test execution in the REPORT_RESULT() macro to output an error value.
if (ENVIRONMENT_IS_WEB) {
window.addEventListener('error', function(e) {
if (e.message.indexOf('unwind') != -1) return;
console.error('Page threw an exception ' + e);
Module['pageThrewException'] = true;
});
}
#if USE_PTHREADS
if (typeof SharedArrayBuffer === 'undefined' || typeof Atomics === 'undefined') {
var xhr = new XMLHttpRequest();
xhr.open('GET', 'http://localhost:8888/report_result?skipped:%20SharedArrayBuffer%20is%20not%20supported!');
xhr.send();
setTimeout(function() { window.close() }, 2000);
}
#endif
#endif
#if IMPORTED_MEMORY
// In non-standalone/normal mode, we create the memory here.
#include "runtime_init_memory.js"
#else // IMPORTED_MEMORY
#if ASSERTIONS
// If memory is defined in wasm, the user can't provide it.
assert(!Module['wasmMemory'], 'Use of `wasmMemory` detected. Use -s IMPORTED_MEMORY to define wasmMemory externally');
assert(INITIAL_MEMORY == {{{INITIAL_MEMORY}}}, 'Detected runtime INITIAL_MEMORY setting. Use -s IMPORTED_MEMORY to define wasmMemory dynamically');
#endif // ASSERTIONS
#endif // IMPORTED_MEMORY
#include "runtime_init_table.js"
#include "runtime_stack_check.js"
#include "runtime_assertions.js"
var __ATPRERUN__ = []; // functions called before the runtime is initialized
var __ATINIT__ = []; // functions called during startup
var __ATMAIN__ = []; // functions called when main() is to be run
var __ATEXIT__ = []; // functions called during shutdown
var __ATPOSTRUN__ = []; // functions called after the main() is called
var runtimeInitialized = false;
var runtimeExited = false;
#if USE_PTHREADS
if (ENVIRONMENT_IS_PTHREAD) runtimeInitialized = true; // The runtime is hosted in the main thread, and bits shared to pthreads via SharedArrayBuffer. No need to init again in pthread.
#endif
function preRun() {
#if USE_PTHREADS
if (ENVIRONMENT_IS_PTHREAD) return; // 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 STACK_OVERFLOW_CHECK
checkStackCookie();
#endif
#if ASSERTIONS
assert(!runtimeInitialized);
#endif
runtimeInitialized = true;
#if STACK_OVERFLOW_CHECK >= 2
___set_stack_limits(_emscripten_stack_get_base(), _emscripten_stack_get_end());
#endif
{{{ getQuoted('ATINITS') }}}
callRuntimeCallbacks(__ATINIT__);
}
function preMain() {
#if STACK_OVERFLOW_CHECK
checkStackCookie();
#endif
#if USE_PTHREADS
if (ENVIRONMENT_IS_PTHREAD) return; // PThreads reuse the runtime from the main thread.
#endif
{{{ getQuoted('ATMAINS') }}}
callRuntimeCallbacks(__ATMAIN__);
}
function exitRuntime() {
#if STACK_OVERFLOW_CHECK
checkStackCookie();
#endif
#if USE_PTHREADS
if (ENVIRONMENT_IS_PTHREAD) return; // PThreads reuse the runtime from the main thread.
#endif
#if EXIT_RUNTIME
callRuntimeCallbacks(__ATEXIT__);
{{{ getQuoted('ATEXITS') }}}
#if USE_PTHREADS
PThread.runExitHandlers();
#endif
#endif
runtimeExited = true;
}
function postRun() {
#if STACK_OVERFLOW_CHECK
checkStackCookie();
#endif
#if USE_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);
}
function addOnPreMain(cb) {
__ATMAIN__.unshift(cb);
}
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) {
#if USE_PTHREADS
// We should never get here in pthreads (could no-op this out if called in pthreads, but that might indicate a bug in caller side,
// so good to be very explicit)
assert(!ENVIRONMENT_IS_PTHREAD, "addRunDependency cannot be used in a pthread worker");
#endif
runDependencies++;
#if expectToReceiveOnModule('monitorRunDependencies')
if (Module['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(function() {
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')
if (Module['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
}
}
}
Module["preloadedImages"] = {}; // maps url to image data
Module["preloadedAudios"] = {}; // maps url to audio data
#if MAIN_MODULE
Module["preloadedWasm"] = {}; // maps url to wasm instance exports
addOnPreRun(preloadDylibs);
#else
#if RELOCATABLE
addOnPreRun(reportUndefinedSymbols);
#endif
#endif
/** @param {string|number=} what */
function abort(what) {
#if expectToReceiveOnModule('onAbort')
if (Module['onAbort']) {
Module['onAbort'](what);
}
#endif
#if USE_PTHREADS
if (ENVIRONMENT_IS_PTHREAD) console.error('Pthread aborting at ' + new Error().stack);
#endif
what += '';
err(what);
ABORT = true;
EXITSTATUS = 1;
#if ASSERTIONS == 0
what = 'abort(' + what + '). Build with -s ASSERTIONS=1 for more info.';
#else
var output = 'abort(' + what + ') at ' + stackTrace();
what = output;
#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.
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;
}
// {{MEM_INITIALIZER}}
#include "memoryprofiler.js"
#if ASSERTIONS && !('$FS' in addedLibraryItems) && !ASMFS
// show errors on likely calls to FS when it was not included
var FS = {
error: function() {
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 -s FORCE_FILESYSTEM=1');
},
init: function() { FS.error() },
createDataFile: function() { FS.error() },
createPreloadedFile: function() { FS.error() },
createLazyFile: function() { FS.error() },
open: function() { FS.error() },
mkdev: function() { FS.error() },
registerDevice: function() { FS.error() },
analyzePath: function() { FS.error() },
loadFilesFromDB: function() { FS.error() },
ErrnoError: function ErrnoError() { FS.error() },
};
Module['FS_createDataFile'] = FS.createDataFile;
Module['FS_createPreloadedFile'] = FS.createPreloadedFile;
#endif
#include "URIUtils.js"
#if ASSERTIONS
function createExportWrapper(name, fixedasm) {
return function() {
var displayName = name;
var asm = fixedasm;
if (!fixedasm) {
asm = Module['asm'];
}
assert(runtimeInitialized, 'native function `' + displayName + '` called before runtime initialization');
assert(!runtimeExited, 'native function `' + displayName + '` called after runtime exit (use NO_EXIT_RUNTIME to keep it alive after main() exits)');
if (!asm[name]) {
assert(asm[name], 'exported native function `' + displayName + '` not found');
}
return asm[name].apply(null, arguments);
};
}
#endif
#if ABORT_ON_WASM_EXCEPTIONS
// When DISABLE_EXCEPTION_CATCHING != 1 `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 function() {
// Don't allow this function to be called if we're aborted!
if (ABORT) {
throw "program has already aborted!";
}
#if DISABLE_EXCEPTION_CATCHING != 1
abortWrapperDepth += 1;
#endif
try {
return original.apply(null, arguments);
}
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
|| e === 'longjmp' // rethrow longjmp if enabled
#endif
) {
throw e;
}
abort("unhandled exception: " + [e, e.stack]);
}
#if DISABLE_EXCEPTION_CATCHING != 1
finally {
abortWrapperDepth -= 1;
}
#endif
}
}
// 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 = function(i) {
var func = realGet.call(wasmTable, i);
var cached = wrapperCache[i];
if (!cached || cached.func !== func) {
cached = wrapperCache[i] = {
func: func,
wrapper: makeAbortWrapper(func)
}
}
return cached.wrapper;
};
}
#endif
var wasmBinaryFile = '{{{ WASM_BINARY_FILE }}}';
if (!isDataURI(wasmBinaryFile)) {
wasmBinaryFile = locateFile(wasmBinaryFile);
}
function getBinary(file) {
try {
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);
} else {
#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
}
}
catch (err) {
abort(err);
}
}
function getBinaryPromise() {
// If we don't have the binary yet, try to to load it asynchronously.
// Fetch has some additional restrictions over XHR, like it can't be used on a file:// url.
// See https://github.com/github/fetch/pull/92#issuecomment-140665932
// Cordova or Electron apps are typically loaded from a file:// url.
// So use fetch if it is available and the url is not a file, otherwise fall back to XHR.
if (!wasmBinary && (ENVIRONMENT_IS_WEB || ENVIRONMENT_IS_WORKER)) {
if (typeof fetch === 'function'
#if ENVIRONMENT_MAY_BE_WEBVIEW
&& !isFileURI(wasmBinaryFile)
#endif
) {
return fetch(wasmBinaryFile, { credentials: 'same-origin' }).then(function(response) {
if (!response['ok']) {
throw "failed to load wasm binary file at '" + wasmBinaryFile + "'";
}
return response['arrayBuffer']();
}).catch(function () {
return getBinary(wasmBinaryFile);
});
}
#if ENVIRONMENT_MAY_BE_WEBVIEW
else {
if (readAsync) {
// fetch is not available or url is file => try XHR (readAsync uses XHR internally)
return new Promise(function(resolve, reject) {
readAsync(wasmBinaryFile, function(response) { resolve(new Uint8Array(/** @type{!ArrayBuffer} */(response))) }, reject)
});
}
}
#endif
}
// Otherwise, getBinary should be able to get it synchronously
return Promise.resolve().then(function() { return getBinary(wasmBinaryFile); });
}
#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
var splitModuleProxyHandler = {
'get': function(target, prop, receiver) {
return function() {
err('placeholder function called: ' + prop);
var imports = {'primary': Module['asm']};
instantiateSync(wasmBinaryFile + '.deferred', imports);
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)).apply(null, arguments);
#else
return wasmTable.get(prop).apply(null, arguments);
#endif
}
}
};
#endif
#if SPLIT_MODULE || !WASM_ASYNC_COMPILATION
function instantiateSync(file, info) {
var instance;
var module;
var binary;
try {
binary = getBinary(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);
if (!nodeFS) nodeFS = require('fs');
var hasCached = nodeFS.existsSync(cachedCodeFile);
if (hasCached) {
#if RUNTIME_LOGGING
err('NODE_CODE_CACHING: loading module');
#endif
try {
module = v8.deserialize(nodeFS.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;
}
}
}
if (!module) {
module = new WebAssembly.Module(binary);
}
if (ENVIRONMENT_IS_NODE && !hasCached) {
#if RUNTIME_LOGGING
err('NODE_CODE_CACHING: saving module');
#endif
nodeFS.writeFileSync(cachedCodeFile, v8.serialize(module));
}
#else // NODE_CODE_CACHING
module = new WebAssembly.Module(binary);
#endif // NODE_CODE_CACHING
instance = new WebAssembly.Instance(module, info);
#if USE_OFFSET_CONVERTER
wasmOffsetConverter = new WasmOffsetConverter(binary, module);
{{{ runOnMainThread("removeRunDependency('offset-converter');") }}}
#endif
} catch (e) {
var str = e.toString();
err('failed to compile wasm module: ' + str);
if (str.indexOf('imported Memory') >= 0 ||
str.indexOf('memory import') >= 0) {
err('Memory size incompatibility issues may be due to changing INITIAL_MEMORY at runtime to something too large. Use ALLOW_MEMORY_GROWTH to allow any size memory (and also make sure not to set INITIAL_MEMORY at runtime to something smaller than it was at compile time).');
}
throw e;
}
#if LOAD_SOURCE_MAP
receiveSourceMapJSON(getSourceMap());
#endif
return [instance, module];
}
#endif
// Create the wasm instance.
// Receives the wasm imports, returns the exports.
function createWasm() {
// prepare imports
var info = {
#if MINIFY_WASM_IMPORTED_MODULES
'a': asmLibraryArg,
#else // MINIFY_WASM_IMPORTED_MODULES
'env': asmLibraryArg,
'{{{ WASI_MODULE_NAME }}}': asmLibraryArg,
#endif // MINIFY_WASM_IMPORTED_MODULES
#if SPLIT_MODULE
'placeholder': new Proxy({}, splitModuleProxyHandler),
#endif
#if RELOCATABLE
'GOT.mem': new Proxy(asmLibraryArg, GOTHandler),
'GOT.func': new Proxy(asmLibraryArg, GOTHandler),
#endif
};
// 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) {
var exports = instance.exports;
#if RELOCATABLE
exports = relocateExports(exports, {{{ GLOBAL_BASE }}});
#endif
#if ASYNCIFY
exports = Asyncify.instrumentWasmExports(exports);
#endif
#if ABORT_ON_WASM_EXCEPTIONS
exports = instrumentWasmExportsWithAbort(exports);
#endif
Module['asm'] = exports;
#if !IMPORTED_MEMORY
wasmMemory = Module['asm']['memory'];
#if ASSERTIONS
assert(wasmMemory, "memory not found in wasm exports");
// This assertion doesn't hold when emscripten is run in --post-link
// mode.
// TODO(sbc): Read INITIAL_MEMORY out of the wasm file in post-link mode.
//assert(wasmMemory.buffer.byteLength === {{{ INITIAL_MEMORY }}});
#endif
updateGlobalBufferAndViews(wasmMemory.buffer);
#endif
#if !MEM_INIT_IN_WASM
runMemoryInitializer();
#endif
#if !RELOCATABLE
wasmTable = Module['asm']['__indirect_function_table'];
#if ASSERTIONS && !PURE_WASI
assert(wasmTable, "table not found in wasm exports");
#endif
#endif
#if ABORT_ON_WASM_EXCEPTIONS
instrumentWasmTableWithAbort();
#endif
#if !DECLARE_ASM_MODULE_EXPORTS
// If we didn't declare the asm exports as top level enties this function
// is in charge of programatically exporting them on the global object.
exportAsmFunctions(exports);
#endif
#if USE_PTHREADS
// We now have the Wasm module loaded up, keep a reference to the compiled module so we can post it to the workers.
wasmModule = module;
// Instantiation is synchronous in pthreads and we assert on run dependencies.
if (!ENVIRONMENT_IS_PTHREAD) {
#if PTHREAD_POOL_SIZE
var numWorkersToLoad = PThread.unusedWorkers.length;
PThread.unusedWorkers.forEach(function(w) { PThread.loadWasmModuleToWorker(w, function() {
#if !PTHREAD_POOL_DELAY_LOAD
// PTHREAD_POOL_DELAY_LOAD==0: we wanted to synchronously wait until the Worker pool
// has loaded up. If all Workers have finished loading up the Wasm Module, proceed with main()
if (!--numWorkersToLoad) removeRunDependency('wasm-instantiate');
#endif
})});
#endif
#if PTHREAD_POOL_DELAY_LOAD || !PTHREAD_POOL_SIZE
// PTHREAD_POOL_DELAY_LOAD==1 (or no preloaded pool in use): do not wait up for the Workers to
// instantiate the Wasm module, but proceed with main() immediately.
removeRunDependency('wasm-instantiate');
#endif
}
#else // singlethreaded build:
removeRunDependency('wasm-instantiate');
#endif
}
// we can't run yet (except in a pthread, where we have a custom sync instantiator)
{{{ runOnMainThread("addRunDependency('wasm-instantiate');") }}}
#if LOAD_SOURCE_MAP
{{{ runOnMainThread("addRunDependency('source-map');") }}}