horrible-hack.js

'use strict';

require('v8').setFlagsFromString('--allow-natives-syntax');

// Extracted from v8/src/runtime/runtime.h
const methodNames = [
  "Abort",
  "AbortJS",
  "AbortCSAAssert",
  "ArraySpeciesProtector",
  "ClearFunctionFeedback",
  "ClearMegamorphicStubCache",
  "CompleteInobjectSlackTracking",
  "ConstructConsString",
  "ConstructDouble",
  "ConstructSlicedString",
  "DebugPrint",
  "DebugPrintPtr",
  "DebugTrace",
  "DebugTrackRetainingPath",
  "DeoptimizeFunction",
  "DeserializeWasmModule",
  "DisallowCodegenFromStrings",
  "DisallowWasmCodegen",
  "DisassembleFunction",
  "DynamicMapChecksEnabled",
  "EnableCodeLoggingForTesting",
  "EnsureFeedbackVectorForFunction",
  "FreezeWasmLazyCompilation",
  "GetCallable",
  "GetInitializerFunction",
  "GetOptimizationStatus",
  "GetUndetectable",
  "GetWasmExceptionId",
  "GetWasmExceptionValues",
  "GetWasmRecoveredTrapCount",
  "GlobalPrint",
  "HasDictionaryElements",
  "HasDoubleElements",
  "HasElementsInALargeObjectSpace",
  "HasFastElements",
  "HasFastProperties",
  "HasFixedBigInt64Elements",
  "HasFixedBigUint64Elements",
  "HasFixedFloat32Elements",
  "HasFixedFloat64Elements",
  "HasFixedInt16Elements",
  "HasFixedInt32Elements",
  "HasFixedInt8Elements",
  "HasFixedUint16Elements",
  "HasFixedUint32Elements",
  "HasFixedUint8ClampedElements",
  "HasFixedUint8Elements",
  "HasHoleyElements",
  "HasObjectElements",
  "HasPackedElements",
  "HasSloppyArgumentsElements",
  "HasSmiElements",
  "HasSmiOrObjectElements",
  "HaveSameMap",
  "HeapObjectVerify",
  "ICsAreEnabled",
  "InYoungGeneration",
  "IsAsmWasmCode",
  "IsBeingInterpreted",
  "IsConcurrentRecompilationSupported",
  "IsLiftoffFunction",
  "IsThreadInWasm",
  "IsWasmCode",
  "IsWasmTrapHandlerEnabled",
  "RegexpHasBytecode",
  "RegexpHasNativeCode",
  "RegexpTypeTag",
  "MapIteratorProtector",
  "NeverOptimizeFunction",
  "NotifyContextDisposed",
  "OptimizeFunctionOnNextCall",
  "OptimizeOsr",
  "NewRegExpWithBacktrackLimit",
  "PrepareFunctionForOptimization",
  "PrintWithNameForAssert",
  "RunningInSimulator",
  "RuntimeEvaluateREPL",
  "SerializeDeserializeNow",
  "SerializeWasmModule",
  "SetAllocationTimeout",
  "SetForceSlowPath",
  "SetIteratorProtector",
  "SetWasmCompileControls",
  "SetWasmInstantiateControls",
  "SetWasmThreadsEnabled",
  "SimulateNewspaceFull",
  "StringIteratorProtector",
  "SystemBreak",
  "TraceEnter",
  "TraceExit",
  "TurbofanStaticAssert",
  "UnblockConcurrentRecompilation",
  "WasmGetNumberOfInstances",
  "WasmNumCodeSpaces",
  "WasmTierDownModule",
  "WasmTierUpFunction",
  "WasmTierUpModule",
  "WasmTraceEnter",
  "WasmTraceExit",
  "WasmTraceMemory",
  "DeoptimizeNow",
  // Strings
  "FlattenString",
  "GetSubstitution",
  "InternalizeString",
  "StringAdd",
  "StringBuilderConcat",
  "StringCharCodeAt",
  "StringEqual",
  "StringEscapeQuotes",
  "StringGreaterThan",
  "StringGreaterThanOrEqual",
  "StringIncludes",
  "StringIndexOf",
  "StringIndexOfUnchecked",
  "StringLastIndexOf",
  "StringLessThan",
  "StringLessThanOrEqual",
  "StringMaxLength",
  "StringReplaceOneCharWithString",
  "StringCompareSequence",
  "StringSubstring",
  "StringToArray",
  "StringTrim",
];
let api = {};

for (const method of methodNames) {
  api[method] = function wrappedBuiltin(...args) {
    if (!api[method].runtimeFunction[args.length]) {
      let innerArgs = args.map((_, i) => 'a' + i);
      api[method].runtimeFunction[args.length] =
      Function(...innerArgs, `return %${method}(${innerArgs.join(',')})`);
    }
    let fn = api[method].runtimeFunction[args.length];
    try {
      return fn(...args);
    } catch (e) {
      require('v8').setFlagsFromString('--allow-natives-syntax');
      return fn(...args);
    }
  }
  api[method].runtimeFunction = [];
}

module.exports = api;