| /** |
| * @license |
| * Copyright 2011 The Emscripten Authors |
| * SPDX-License-Identifier: MIT |
| */ |
| |
| //"use strict"; |
| |
| // Various namespace-like modules |
| |
| var STACK_ALIGN = 16; |
| |
| var Variables = { |
| globals: {}, |
| indexedGlobals: {}, // for indexed globals, ident ==> index |
| // Used in calculation of indexed globals |
| nextIndexedOffset: 0, |
| |
| resolveAliasToIdent: function(ident) { |
| while (1) { |
| var varData = Variables.globals[ident]; |
| if (!(varData && varData.targetIdent)) break; |
| ident = varData.targetIdent; // might need to eval to turn (6) into 6 |
| } |
| return ident; |
| }, |
| }; |
| |
| var Types = { |
| types: {}, |
| }; |
| |
| // Constructs an array ['a0', 'a1', 'a2', ..., 'a(n-1)'] |
| function genArgSequence(n) { |
| var args = []; |
| for (var i = 0; i < n; ++i) { |
| args.push('a'+i); |
| } |
| return args; |
| } |
| |
| var Functions = { |
| // All functions that will be implemented in this file. Maps id to signature |
| implementedFunctions: {}, |
| // functions added from the library. value 2 means asmLibraryFunction |
| libraryFunctions: {}, |
| }; |
| |
| var LibraryManager = { |
| library: null, |
| structs: {}, |
| loaded: false, |
| libraries: [], |
| |
| has: function(name) { |
| return this.libraries.indexOf(name) >= 0; |
| }, |
| |
| load: function() { |
| if (this.library) return; |
| |
| // Core system libraries (always linked against) |
| var libraries = [ |
| 'library.js', |
| 'library_formatString.js', |
| 'library_math.js', |
| 'library_path.js', |
| 'library_signals.js', |
| 'library_syscall.js', |
| 'library_html5.js', |
| 'library_stack_trace.js', |
| 'library_wasi.js', |
| 'library_int53.js', |
| 'library_dylink.js' |
| ]; |
| |
| if (!EXCEPTION_HANDLING) { |
| if (!DISABLE_EXCEPTION_THROWING) { |
| libraries.push('library_exceptions.js'); |
| } else { |
| libraries.push('library_exceptions_stub.js'); |
| } |
| } |
| |
| if (MINIMAL_RUNTIME) { |
| // Classic runtime brings in string-related functions in the runtime preamble, by including |
| // runtime_strings_extra.js that contain the same contents as library_strings.js does. In |
| // MINIMAL_RUNTIME those string functions are available as JS library functions instead from |
| // library_strings.js, to avoid unconditionally bringing in extra code to the build. |
| libraries.push('library_strings.js'); |
| } else { |
| libraries.push('library_browser.js'); |
| } |
| |
| if (USE_PTHREADS) { // TODO: Currently WebGL proxying makes pthreads library depend on WebGL. |
| libraries.push('library_webgl.js'); |
| libraries.push('library_html5_webgl.js'); |
| } |
| |
| if (FILESYSTEM) { |
| // Core filesystem libraries (always linked against, unless -s FILESYSTEM=0 is specified) |
| libraries = libraries.concat([ |
| 'library_fs.js', |
| 'library_memfs.js', |
| 'library_tty.js', |
| 'library_pipefs.js', // ok to include it by default since it's only used if the syscall is used |
| 'library_sockfs.js', // ok to include it by default since it's only used if the syscall is used |
| ]); |
| |
| if (NODERAWFS) { |
| // NODERAWFS requires NODEFS |
| if (SYSTEM_JS_LIBRARIES.indexOf('library_nodefs.js') < 0) { |
| libraries.push('library_nodefs.js'); |
| } |
| libraries.push('library_noderawfs.js'); |
| } |
| } |
| |
| // Additional JS libraries (without AUTO_JS_LIBRARIES, link to these explicitly via -lxxx.js) |
| if (AUTO_JS_LIBRARIES) { |
| libraries = libraries.concat([ |
| 'library_webgl.js', |
| 'library_html5_webgl.js', |
| 'library_openal.js', |
| 'library_sdl.js', |
| 'library_glut.js', |
| 'library_xlib.js', |
| 'library_egl.js', |
| 'library_glfw.js', |
| 'library_uuid.js', |
| 'library_glew.js', |
| 'library_idbstore.js', |
| 'library_async.js' |
| ]); |
| } else { |
| if (ASYNCIFY) { |
| libraries.push('library_async.js'); |
| } |
| if (USE_SDL == 1) { |
| libraries.push('library_sdl.js'); |
| } |
| if (USE_SDL == 2) { |
| libraries.push('library_egl.js', 'library_webgl.js', 'library_html5_webgl.js'); |
| } |
| } |
| |
| // Add any explicitly specified system JS libraries to link to, add those to link. |
| libraries = libraries.concat(SYSTEM_JS_LIBRARIES) |
| |
| if (LZ4) { |
| libraries.push('library_lz4.js'); |
| } |
| |
| if (MAX_WEBGL_VERSION >= 2) { |
| libraries.push('library_webgl2.js'); |
| } |
| |
| if (LEGACY_GL_EMULATION) { |
| libraries.push('library_glemu.js'); |
| } |
| |
| if (USE_WEBGPU) { |
| libraries.push('library_webgpu.js'); |
| libraries.push('library_html5_webgpu.js'); |
| } |
| |
| if (BOOTSTRAPPING_STRUCT_INFO) { |
| libraries = [ |
| 'library_bootstrap.js', |
| 'library_formatString.js', |
| 'library_stack_trace.js', |
| 'library_int53.js', |
| ]; |
| } |
| |
| if (SUPPORT_BIG_ENDIAN) { |
| libraries.push('library_little_endian_heap.js'); |
| } |
| |
| // Deduplicate libraries to avoid processing any library file multiple times |
| libraries = libraries.filter(function(item, pos) { |
| return libraries.indexOf(item) == pos; |
| }); |
| |
| // Save the list for has() queries later. |
| this.libraries = libraries; |
| |
| for (var filename of libraries) { |
| var src = read(filename); |
| var processed = undefined; |
| try { |
| processed = processMacros(preprocess(src, filename)); |
| eval(processed); |
| } catch(e) { |
| var details = [e, e.lineNumber ? 'line number: ' + e.lineNumber : '']; |
| if (VERBOSE) { |
| details.push((e.stack || "").toString().replace('Object.<anonymous>', filename)); |
| } |
| if (processed) { |
| error('failure to execute js library "' + filename + '": ' + details); |
| if (VERBOSE) { |
| error('preprocessed source (you can run a js engine on this to get a clearer error message sometimes):\n=============\n' + processed + '\n============='); |
| } else { |
| error('use -s VERBOSE to see more details') |
| } |
| } else { |
| error('failure to process js library "' + filename + '": ' + details); |
| if (VERBOSE) { |
| error('original source:\n=============\n' + src + '\n============='); |
| } else { |
| error('use -s VERBOSE to see more details') |
| } |
| } |
| throw e; |
| } |
| } |
| |
| // apply synonyms. these are typically not speed-sensitive, and doing it |
| // this way makes it possible to not include hacks in the compiler |
| // (and makes it simpler to switch between SDL versions, fastcomp and non-fastcomp, etc.). |
| var lib = LibraryManager.library; |
| libloop: for (var x in lib) { |
| if (isJsLibraryConfigIdentifier(x)) { |
| var index = x.lastIndexOf('__'); |
| var basename = x.slice(0, index); |
| if (!(basename in lib)) { |
| error('Missing library element `' + basename + '` for library config `' + x + '`'); |
| } |
| continue; |
| } |
| if (typeof lib[x] === 'string') { |
| var target = x; |
| while (typeof lib[target] === 'string') { |
| // ignore code and variable assignments, aliases are just simple names |
| if (lib[target].search(/[=({; ]/) >= 0) continue libloop; |
| target = lib[target]; |
| } |
| if (!isNaN(target)) continue; // This is a number, and so cannot be an alias target. |
| if (typeof lib[target] === 'undefined' || typeof lib[target] === 'function') { |
| // When functions are aliased, a signature for the function must be |
| // provided so that an efficient form of forwarding can be |
| // implemented. |
| function testStringType(sig) { |
| if (typeof lib[sig] !== 'undefined' && typeof typeof lib[sig] !== 'string') { |
| error(sig + ' should be a string! (was ' + typeof lib[sig]); |
| } |
| } |
| var aliasSig = x + '__sig'; |
| var targetSig = target + '__sig'; |
| testStringType(aliasSig); |
| testStringType(targetSig); |
| if (typeof lib[aliasSig] === 'string' && typeof lib[targetSig] === 'string' && lib[aliasSig] != lib[targetSig]) { |
| error(aliasSig + ' (' + lib[aliasSig] + ') differs from ' + targetSig + ' (' + lib[targetSig] + ')'); |
| } |
| |
| var sig = lib[aliasSig] || lib[targetSig]; |
| if (typeof sig !== 'string') { |
| error('Function ' + x + ' aliases to target function ' + target + ', but neither the alias or the target provide a signature. Please add a ' + targetSig + ": 'vifj...' annotation or a " + aliasSig + ": 'vifj...' annotation to describe the type of function forwarding that is needed!"); |
| } |
| |
| // If only one of the target or the alias specifies a sig then copy |
| // this signature to the other. |
| if (!lib[aliasSig]) { |
| lib[aliasSig] = lib[targetSig]; |
| } else if (!lib[targetSig]) { |
| lib[targetSig] = lib[aliasSig]; |
| } |
| |
| if (typeof lib[target] !== 'function') { |
| error(`no alias found for ${x}`); |
| } |
| |
| var argCount = sig.length - 1; |
| if (argCount !== lib[target].length) { |
| error(`incorrect number of arguments in signature of ${x} (declared: ${argCount}, expected: ${lib[target].length})`); |
| } |
| var ret = sig == 'v' ? '' : 'return '; |
| var args = genArgSequence(argCount).join(','); |
| lib[x] = new Function(args, ret + '_' + target + '(' + args + ');'); |
| |
| if (!lib[x + '__deps']) lib[x + '__deps'] = []; |
| lib[x + '__deps'].push(target); |
| } |
| } |
| } |
| |
| this.loaded = true; |
| }, |
| |
| // Given an ident, see if it is an alias for something, and so forth, returning |
| // the earliest ancestor (the root) |
| getRootIdent: function(ident) { |
| if (!this.library) return null; |
| var ret = LibraryManager.library[ident]; |
| if (!ret) return null; |
| var last = ident; |
| while (typeof ret === 'string') { |
| last = ret; |
| ret = LibraryManager.library[ret]; |
| } |
| return last; |
| }, |
| |
| isStubFunction: function(ident) { |
| var libCall = LibraryManager.library[ident.substr(1)]; |
| return typeof libCall === 'function' && libCall.toString().replace(/\s/g, '') === 'function(){}' |
| && !(ident in Functions.implementedFunctions); |
| } |
| }; |
| |
| if (!BOOTSTRAPPING_STRUCT_INFO) { |
| // Load struct and define information. |
| var temp = JSON.parse(read(STRUCT_INFO)); |
| C_STRUCTS = temp.structs; |
| C_DEFINES = temp.defines; |
| } else { |
| C_STRUCTS = {}; |
| C_DEFINES = {}; |
| } |
| |
| // Safe way to access a C define. We check that we don't add library functions with missing defines. |
| function cDefine(key) { |
| if (key in C_DEFINES) return C_DEFINES[key]; |
| throw 'Missing C define ' + key + '! If you just added it to struct_info.json, you need to ./emcc --clear-cache'; |
| } |
| |
| var EXPORTED_RUNTIME_METHODS_SET = set(EXPORTED_RUNTIME_METHODS.concat(EXTRA_EXPORTED_RUNTIME_METHODS)); |
| EXPORTED_RUNTIME_METHODS = unset(EXPORTED_RUNTIME_METHODS_SET); |
| EXTRA_EXPORTED_RUNTIME_METHODS = []; |
| |
| function isFSPrefixed(name) { |
| return name.length > 3 && name[0] === 'F' && name[1] === 'S' && name[2] === '_'; |
| } |
| |
| // forcing the filesystem exports a few things by default |
| function isExportedByForceFilesystem(name) { |
| return name === 'FS_createPath' || |
| name === 'FS_createDataFile' || |
| name === 'FS_createPreloadedFile' || |
| name === 'FS_createLazyFile' || |
| name === 'FS_createDevice' || |
| name === 'FS_unlink' || |
| name === 'addRunDependency' || |
| name === 'removeRunDependency'; |
| } |
| |
| // export parts of the JS runtime that the user asked for |
| function exportRuntime() { |
| // optionally export something. |
| // in ASSERTIONS mode we show a useful error if it is used without |
| // being exported. how we show the message depends on whether it's |
| // a function (almost all of them) or a number. |
| function maybeExport(name, isNumber) { |
| // if requested to be exported, export it |
| if (name in EXPORTED_RUNTIME_METHODS_SET) { |
| var exported = name; |
| // the exported name may differ from the internal name |
| if (isFSPrefixed(exported)) { |
| // this is a filesystem value, FS.x exported as FS_x |
| exported = 'FS.' + exported.substr(3); |
| } else if (exported === 'print') { |
| exported = 'out'; |
| } else if (exported === 'printErr') { |
| exported = 'err'; |
| } |
| return 'Module["' + name + '"] = ' + exported + ';'; |
| } |
| // do not export it. but if ASSERTIONS, emit a |
| // stub with an error, so the user gets a message |
| // if it is used, that they should export it |
| if (ASSERTIONS) { |
| // check if it already exists, to support EXPORT_ALL and other cases |
| // (we could optimize this, but in ASSERTIONS mode code size doesn't |
| // matter anyhow) |
| var extra = ''; |
| if (isExportedByForceFilesystem(name)) { |
| extra = '. Alternatively, forcing filesystem support (-s FORCE_FILESYSTEM=1) can export this for you'; |
| } |
| if (!isNumber) { |
| return 'if (!Object.getOwnPropertyDescriptor(Module, "' + name + '")) Module["' + name + '"] = function() { abort("\'' + name + '\' was not exported. add it to EXTRA_EXPORTED_RUNTIME_METHODS (see the FAQ)' + extra + '") };'; |
| } else { |
| return 'if (!Object.getOwnPropertyDescriptor(Module, "' + name + '")) Object.defineProperty(Module, "' + name + '", { configurable: true, get: function() { abort("\'' + name + '\' was not exported. add it to EXTRA_EXPORTED_RUNTIME_METHODS (see the FAQ)' + extra + '") } });'; |
| } |
| } |
| return ''; |
| } |
| |
| function maybeExportNumber(name) { |
| return maybeExport(name, true); |
| } |
| |
| // All possible runtime elements to export |
| var runtimeElements = [ |
| 'intArrayFromString', |
| 'intArrayToString', |
| 'ccall', |
| 'cwrap', |
| 'setValue', |
| 'getValue', |
| 'allocate', |
| 'UTF8ArrayToString', |
| 'UTF8ToString', |
| 'stringToUTF8Array', |
| 'stringToUTF8', |
| 'lengthBytesUTF8', |
| 'stackTrace', |
| 'addOnPreRun', |
| 'addOnInit', |
| 'addOnPreMain', |
| 'addOnExit', |
| 'addOnPostRun', |
| 'writeStringToMemory', |
| 'writeArrayToMemory', |
| 'writeAsciiToMemory', |
| 'addRunDependency', |
| 'removeRunDependency', |
| 'FS_createFolder', |
| 'FS_createPath', |
| 'FS_createDataFile', |
| 'FS_createPreloadedFile', |
| 'FS_createLazyFile', |
| 'FS_createLink', |
| 'FS_createDevice', |
| 'FS_unlink', |
| 'getLEB', |
| 'getFunctionTables', |
| 'alignFunctionTables', |
| 'registerFunctions', |
| 'addFunction', |
| 'removeFunction', |
| 'getFuncWrapper', |
| 'prettyPrint', |
| 'makeBigInt', |
| 'dynCall', |
| 'getCompilerSetting', |
| 'print', |
| 'printErr', |
| 'getTempRet0', |
| 'setTempRet0', |
| 'callMain', |
| 'abort', |
| ]; |
| |
| if (USE_OFFSET_CONVERTER) { |
| runtimeElements.push('WasmOffsetConverter'); |
| } |
| |
| if (LOAD_SOURCE_MAP) { |
| runtimeElements.push('WasmSourceMap'); |
| } |
| |
| // Add JS library elements such as FS, GL, ENV, etc. These are prefixed with |
| // '$ which indicates they are JS methods. |
| for (var ident in LibraryManager.library) { |
| if (ident[0] === '$' && !isJsLibraryConfigIdentifier(ident)) { |
| runtimeElements.push(ident.substr(1)); |
| } |
| } |
| |
| if (!MINIMAL_RUNTIME) { |
| // MINIMAL_RUNTIME has moved these functions to library_strings.js |
| runtimeElements = runtimeElements.concat([ |
| 'warnOnce', |
| 'stackSave', |
| 'stackRestore', |
| 'stackAlloc', |
| 'AsciiToString', |
| 'stringToAscii', |
| 'UTF16ToString', |
| 'stringToUTF16', |
| 'lengthBytesUTF16', |
| 'UTF32ToString', |
| 'stringToUTF32', |
| 'lengthBytesUTF32', |
| 'allocateUTF8', |
| 'allocateUTF8OnStack' |
| ]); |
| |
| } |
| |
| if (STACK_OVERFLOW_CHECK) { |
| runtimeElements.push('writeStackCookie'); |
| runtimeElements.push('checkStackCookie'); |
| } |
| |
| if (USE_PTHREADS) { |
| // In pthreads mode, the following functions always need to be exported to |
| // Module for closure compiler, and also for MODULARIZE (so worker.js can |
| // access them). |
| var threadExports = ['PThread', 'wasmMemory']; |
| if (!MINIMAL_RUNTIME) { |
| threadExports.push('ExitStatus'); |
| } |
| |
| threadExports.forEach(function(x) { |
| EXPORTED_RUNTIME_METHODS_SET[x] = 1; |
| runtimeElements.push(x); |
| }); |
| } |
| |
| if (SUPPORT_BASE64_EMBEDDING) { |
| runtimeElements.push('intArrayFromBase64'); |
| runtimeElements.push('tryParseAsDataURI'); |
| } |
| // dynCall_* methods are not hardcoded here, as they |
| // depend on the file being compiled. check for them |
| // and add them. |
| for (var name in EXPORTED_RUNTIME_METHODS_SET) { |
| if (/^dynCall_/.test(name)) { |
| // a specific dynCall; add to the list |
| runtimeElements.push(name); |
| } |
| } |
| var runtimeNumbers = [ |
| 'ALLOC_NORMAL', |
| 'ALLOC_STACK', |
| ]; |
| if (ASSERTIONS) { |
| // check all exported things exist, warn about typos |
| for (var name in EXPORTED_RUNTIME_METHODS_SET) { |
| if (runtimeElements.indexOf(name) < 0 && |
| runtimeNumbers.indexOf(name) < 0) { |
| printErr('warning: invalid item (maybe a typo?) in EXPORTED_RUNTIME_METHODS: ' + name); |
| } |
| } |
| } |
| var exports = runtimeElements.map(function(name) { return maybeExport(name); }); |
| exports = exports.concat(runtimeNumbers.map(function(name) { return maybeExportNumber(name); })); |
| exports = exports.filter(function(name) { return name != '' }); |
| return exports.join('\n'); |
| } |
| |
| var PassManager = { |
| serialize: function() { |
| print('\n//FORWARDED_DATA:' + JSON.stringify({ |
| Functions: Functions, |
| EXPORTED_FUNCTIONS: EXPORTED_FUNCTIONS, |
| ATINITS: ATINITS.join('\n'), |
| ATMAINS: ATMAINS.join('\n'), |
| ATEXITS: ATEXITS.join('\n'), |
| })); |
| }, |
| load: function(json) { |
| var data = JSON.parse(json); |
| for (var i in data.Types) { |
| Types[i] = data.Types[i]; |
| } |
| for (var i in data.Variables) { |
| Variables[i] = data.Variables[i]; |
| } |
| for (var i in data.Functions) { |
| Functions[i] = data.Functions[i]; |
| } |
| EXPORTED_FUNCTIONS = data.EXPORTED_FUNCTIONS; |
| /* |
| print('\n//LOADED_DATA:' + JSON.stringify({ |
| Types: Types, |
| Variables: Variables, |
| Functions: Functions |
| })); |
| */ |
| } |
| }; |
