| //------------------------------------------------------------------------------------------------------- |
| // Copyright (C) Microsoft. All rights reserved. |
| // Licensed under the MIT license. See LICENSE.txt file in the project root for full license information. |
| //------------------------------------------------------------------------------------------------------- |
| #pragma once |
| |
| #ifdef _M_X64_OR_ARM64 |
| # define WIN64_STACK_FACTOR 3 |
| #else |
| # define WIN64_STACK_FACTOR 1 |
| #endif |
| |
| namespace Js |
| { |
| class Constants |
| { |
| public: |
| // Id of the NoContextSourceContextInfo |
| static const uint NoSourceContext = (uint)-1; |
| // Variable indicating no source context cookie was passed in by the host- indicates Dynamic Script |
| static const uint JsBuiltInSourceContextId = (uint)-2; |
| static const DWORD_PTR JsBuiltInSourceContext = (DWORD_PTR)-2; |
| static const DWORD_PTR NoHostSourceContext = (DWORD_PTR)-1; |
| static const DWORD_PTR FunctionBodyUnavailable = (DWORD_PTR)NULL; // Not a valid Var |
| static const LocalFunctionId NoFunctionId = (LocalFunctionId)-1; |
| static const uint NoStatementIndex = (uint)-1; |
| static const uint NoByteCodeOffset = (uint)-1; |
| static const PropertyId NoProperty = -1; |
| static const RegSlot NoRegister = (RegSlot)-1; |
| static const RegSlot OneByteRegister = (RegSlot_OneByte)-1; |
| static const int32 InvalidOffset = -1; |
| static const unsigned int PropertyGroupSize = 512; |
| static const unsigned int PropertyGroupMask = PropertyGroupSize-1; |
| static const unsigned int PropertyGroupShift = 9; |
| static const unsigned int MaxPropertyGroups = 128; |
| static const PropertyIndex FieldsChunkSize = 4; |
| static const PropertyIndex NoSlot = (PropertyIndex)-1; |
| static const PropertyIndex PropertyIndexMax = 0xFFFE; |
| static const BigPropertyIndex NoBigSlot = (BigPropertyIndex)-1; |
| static const int IntMaxValue = 2147483647; |
| static const int Int31MinValue = -1073741824; //0xC0000000 |
| static const int Int31MaxValue = ~Int31MinValue; |
| static const unsigned int UShortMaxValue = 0xFFFF; |
| static const uint InvalidSourceIndex = (uint)-1; |
| static const ProfileId NoProfileId = (ProfileId)-1; |
| static const int InvalidByteCodeOffset = -1; |
| static const InlineCacheIndex NoInlineCacheIndex = (InlineCacheIndex)-1; |
| static const uint UninitializedValue = (uint)-1; |
| static const ArgSlot InvalidArgSlot = (ArgSlot)-1; |
| static const uint32 InvalidSymID = (uint32)-1; |
| static const size_t InvalidSignature = (size_t)-1; |
| |
| static const uint64 ExponentMask; |
| static const uint64 MantissaMask; |
| |
| static const int ReservedTypeIds = 2048; |
| |
| // 1 MEM_RESERVE page at the bottom of the stack |
| // 1 PAGE_GUARD | PAGE_READWRITE page that serves as the guard page |
| static const unsigned NumGuardPages = 2; |
| |
| // We need to keep some buffer to run our stack overflow |
| // handling code which throws an exception |
| static const unsigned StackOverflowHandlingBufferPages = 10; |
| |
| // Minimum stack required to JIT-compile a function |
| static const unsigned MinStackJITCompile = 16 * 0x400 * WIN64_STACK_FACTOR; // 16 KB |
| |
| // Maximum number of arguments allowed on an inlinee function for constant argument inlining |
| // It is set to 13 to ensure optimum size of callSiteInfo |
| static const unsigned MaximumArgumentCountForConstantArgumentInlining = 13; |
| |
| //Invalid loop unrolling factor used for memory operations (memset/ memcopy) |
| static const byte InvalidLoopUnrollFactor = 0x7F; |
| |
| // Minimum stack required to be able to execute a JITted Javascript function. |
| static const unsigned MinStackJIT = 0x930 * WIN64_STACK_FACTOR; |
| |
| // Maximum stack space allowed to avoid generating ProbeCurrentStack |
| static const unsigned MaxStackSizeForNoProbe = 0x64; |
| |
| #if (defined(_M_ARM32_OR_ARM64) || defined(_M_AMD64)) |
| #if DBG |
| static const unsigned MinStackInterpreter = 0x4000; // 16 KB |
| #else |
| // Minimum stack required to be able to enter the interpreter. |
| static const unsigned MinStackInterpreter = 0x2000; // 8 KB |
| #endif |
| #else |
| #if DBG |
| static const unsigned MinStackInterpreter = 0x1000; // 4 KB |
| #else |
| // Minimum stack required to be able to enter the interpreter. |
| static const unsigned MinStackInterpreter = 0xC00; // 3 KB |
| #endif |
| #endif |
| // Minimum stack required by the byte code compiler. |
| static const unsigned MinStackCompile = 0x400 * WIN64_STACK_FACTOR; // 1 KB |
| |
| static const unsigned MinStackByteCodeVisitor = 0xC00 * WIN64_STACK_FACTOR; // 3 KB |
| static const unsigned MinStackRegex = 8 * 0x400 * WIN64_STACK_FACTOR; // 8 KB |
| |
| static const unsigned MinStackRuntime = 32 * 0x0400 * WIN64_STACK_FACTOR; |
| static const unsigned MinStackCallout = 32 * 0x0400 * WIN64_STACK_FACTOR; |
| |
| static const unsigned MinStackParseOneTerm = 0x100 * WIN64_STACK_FACTOR; |
| |
| // MinStackDefault is the minimum amount of stack space required to |
| // call RaiseException to report a stack overflow. |
| static const unsigned MinStackDefault = 1 * 0x0400 * WIN64_STACK_FACTOR; |
| static const unsigned ExtraStack = 2 * 0x0400 * WIN64_STACK_FACTOR; |
| |
| #if _M_IX86_OR_ARM32 |
| static const unsigned MaxThreadJITCodeHeapSize = 28 * 1024 * 1024; |
| static const unsigned MaxProcessJITCodeHeapSize = 55 * 1024 * 1024; |
| #elif _M_X64_OR_ARM64 |
| // larger address space means we can keep this higher on 64 bit architectures |
| static const unsigned MaxThreadJITCodeHeapSize = 800 * 1024 * 1024; |
| static const unsigned MaxProcessJITCodeHeapSize = 1024 * 1024 * 1024; |
| #endif |
| |
| static const size_t StackLimitForScriptInterrupt; |
| |
| |
| // Arguments object created on the fly is 1 slot before the frame |
| static const int ArgumentLocationOnFrame = 1; |
| static const int StackNestedFuncList = 2; |
| static const int StackFrameDisplay = 3; |
| static const int StackScopeSlots = 4; |
| #if _M_IX86 || _M_AMD64 |
| static const int StackNestedFuncListWithNoArg = 1; |
| static const int StackFrameDisplayWithNoArg = 2; |
| static const int StackScopeSlotsWithNoArg = 3; |
| #endif |
| |
| static const DWORD NonWebWorkerContextId = 0; |
| |
| // Inlinee constants shared between the backend and the stack walker. |
| static const uint InlineeMetaArgIndex_Argc = 0; |
| static const uint InlineeMetaArgIndex_FunctionObject = 1; |
| static const uint InlineeMetaArgIndex_ArgumentsObject = 2; |
| static const uint InlineeMetaArgIndex_Argv = 3; |
| static const uint InlineeMetaArgCount = 3; |
| |
| static const char16 AnonymousFunction[]; |
| static const char16 AnonymousCode[]; |
| static const char16 Anonymous[]; // Used in the function created due to new Function |
| static const char16 Empty[]; |
| static const char16 FunctionCode[]; |
| static const char16 GlobalCode[]; |
| static const char16 EvalCode[]; |
| static const char16 GlobalFunction[]; |
| static const char16 UnknownScriptCode[]; |
| static const char16 StringReplace[]; |
| static const char16 StringMatch[]; |
| |
| static const size_t AnonymousFunctionLength = _countof(_u("Anonymous function")) - 1; |
| static const size_t AnonymousLength = _countof(_u("anonymous")) - 1; |
| static const size_t AnonymousClassLength = _countof(_u("Anonymous class")) - 1; |
| static const size_t FunctionCodeLength = _countof(_u("Function code")) - 1; |
| static const size_t GlobalFunctionLength = _countof(_u("glo")) - 1; |
| static const size_t GlobalCodeLength = _countof(_u("Global code")) - 1; |
| static const size_t EvalCodeLength = _countof(_u("eval code")) - 1; |
| static const size_t UnknownScriptCodeLength = _countof(_u("Unknown script code")) - 1; |
| }; |
| |
| extern const FrameDisplay NullFrameDisplay; |
| extern const FrameDisplay StrictNullFrameDisplay; |
| } |
