20655a20cd
This method will be used for a test with multiple code spaces, to
encode large function indexes. The current implementation in
{wasmI32Const} just always uses 5 bytes for encoding the LEB value.
This CL adds a {wasmSignedLeb} function which properly encodes the
value, and adds tests for that.
Drive-by: Clean up the rest of {test-wasm-module-builder.js}.
R=mstarzinger@chromium.org
Bug: v8:9477
Change-Id: Ide2d90eed9d40aa28df680fbb413275346d9c0b6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1725623
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62990}
1423 lines
43 KiB
JavaScript
1423 lines
43 KiB
JavaScript
// Copyright 2016 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
// Used for encoding f32 and double constants to bits.
|
|
let f32_view = new Float32Array(1);
|
|
let f32_bytes_view = new Uint8Array(f32_view.buffer);
|
|
let f64_view = new Float64Array(1);
|
|
let f64_bytes_view = new Uint8Array(f64_view.buffer);
|
|
|
|
// The bytes function receives one of
|
|
// - several arguments, each of which is either a number or a string of length
|
|
// 1; if it's a string, the charcode of the contained character is used.
|
|
// - a single array argument containing the actual arguments
|
|
// - a single string; the returned buffer will contain the char codes of all
|
|
// contained characters.
|
|
function bytes(...input) {
|
|
if (input.length == 1 && typeof input[0] == 'array') input = input[0];
|
|
if (input.length == 1 && typeof input[0] == 'string') {
|
|
let len = input[0].length;
|
|
let view = new Uint8Array(len);
|
|
for (let i = 0; i < len; i++) view[i] = input[0].charCodeAt(i);
|
|
return view.buffer;
|
|
}
|
|
let view = new Uint8Array(input.length);
|
|
for (let i = 0; i < input.length; i++) {
|
|
let val = input[i];
|
|
if (typeof val == 'string') {
|
|
assertEquals(1, val.length, 'string inputs must have length 1');
|
|
val = val.charCodeAt(0);
|
|
}
|
|
view[i] = val | 0;
|
|
}
|
|
return view.buffer;
|
|
}
|
|
|
|
// Header declaration constants
|
|
var kWasmH0 = 0;
|
|
var kWasmH1 = 0x61;
|
|
var kWasmH2 = 0x73;
|
|
var kWasmH3 = 0x6d;
|
|
|
|
var kWasmV0 = 0x1;
|
|
var kWasmV1 = 0;
|
|
var kWasmV2 = 0;
|
|
var kWasmV3 = 0;
|
|
|
|
var kHeaderSize = 8;
|
|
var kPageSize = 65536;
|
|
var kSpecMaxPages = 65535;
|
|
var kMaxVarInt32Size = 5;
|
|
var kMaxVarInt64Size = 10;
|
|
|
|
let kDeclNoLocals = 0;
|
|
|
|
// Section declaration constants
|
|
let kUnknownSectionCode = 0;
|
|
let kTypeSectionCode = 1; // Function signature declarations
|
|
let kImportSectionCode = 2; // Import declarations
|
|
let kFunctionSectionCode = 3; // Function declarations
|
|
let kTableSectionCode = 4; // Indirect function table and other tables
|
|
let kMemorySectionCode = 5; // Memory attributes
|
|
let kGlobalSectionCode = 6; // Global declarations
|
|
let kExportSectionCode = 7; // Exports
|
|
let kStartSectionCode = 8; // Start function declaration
|
|
let kElementSectionCode = 9; // Elements section
|
|
let kCodeSectionCode = 10; // Function code
|
|
let kDataSectionCode = 11; // Data segments
|
|
let kDataCountSectionCode = 12; // Data segment count (between Element & Code)
|
|
let kExceptionSectionCode = 13; // Exception section (between Global & Export)
|
|
|
|
// Name section types
|
|
let kModuleNameCode = 0;
|
|
let kFunctionNamesCode = 1;
|
|
let kLocalNamesCode = 2;
|
|
|
|
let kWasmFunctionTypeForm = 0x60;
|
|
let kWasmAnyFunctionTypeForm = 0x70;
|
|
|
|
let kHasMaximumFlag = 1;
|
|
let kSharedHasMaximumFlag = 3;
|
|
|
|
// Segment flags
|
|
let kActiveNoIndex = 0;
|
|
let kPassive = 1;
|
|
let kActiveWithIndex = 2;
|
|
|
|
// Function declaration flags
|
|
let kDeclFunctionName = 0x01;
|
|
let kDeclFunctionImport = 0x02;
|
|
let kDeclFunctionLocals = 0x04;
|
|
let kDeclFunctionExport = 0x08;
|
|
|
|
// Local types
|
|
let kWasmStmt = 0x40;
|
|
let kWasmI32 = 0x7f;
|
|
let kWasmI64 = 0x7e;
|
|
let kWasmF32 = 0x7d;
|
|
let kWasmF64 = 0x7c;
|
|
let kWasmS128 = 0x7b;
|
|
let kWasmAnyRef = 0x6f;
|
|
let kWasmAnyFunc = 0x70;
|
|
let kWasmExnRef = 0x68;
|
|
|
|
let kExternalFunction = 0;
|
|
let kExternalTable = 1;
|
|
let kExternalMemory = 2;
|
|
let kExternalGlobal = 3;
|
|
let kExternalException = 4;
|
|
|
|
let kTableZero = 0;
|
|
let kMemoryZero = 0;
|
|
let kSegmentZero = 0;
|
|
|
|
let kExceptionAttribute = 0;
|
|
|
|
// Useful signatures
|
|
let kSig_i_i = makeSig([kWasmI32], [kWasmI32]);
|
|
let kSig_l_l = makeSig([kWasmI64], [kWasmI64]);
|
|
let kSig_i_l = makeSig([kWasmI64], [kWasmI32]);
|
|
let kSig_i_ii = makeSig([kWasmI32, kWasmI32], [kWasmI32]);
|
|
let kSig_i_iii = makeSig([kWasmI32, kWasmI32, kWasmI32], [kWasmI32]);
|
|
let kSig_v_iiii = makeSig([kWasmI32, kWasmI32, kWasmI32, kWasmI32], []);
|
|
let kSig_f_ff = makeSig([kWasmF32, kWasmF32], [kWasmF32]);
|
|
let kSig_d_dd = makeSig([kWasmF64, kWasmF64], [kWasmF64]);
|
|
let kSig_l_ll = makeSig([kWasmI64, kWasmI64], [kWasmI64]);
|
|
let kSig_i_dd = makeSig([kWasmF64, kWasmF64], [kWasmI32]);
|
|
let kSig_v_v = makeSig([], []);
|
|
let kSig_i_v = makeSig([], [kWasmI32]);
|
|
let kSig_l_v = makeSig([], [kWasmI64]);
|
|
let kSig_f_v = makeSig([], [kWasmF32]);
|
|
let kSig_d_v = makeSig([], [kWasmF64]);
|
|
let kSig_v_i = makeSig([kWasmI32], []);
|
|
let kSig_v_ii = makeSig([kWasmI32, kWasmI32], []);
|
|
let kSig_v_iii = makeSig([kWasmI32, kWasmI32, kWasmI32], []);
|
|
let kSig_v_l = makeSig([kWasmI64], []);
|
|
let kSig_v_d = makeSig([kWasmF64], []);
|
|
let kSig_v_dd = makeSig([kWasmF64, kWasmF64], []);
|
|
let kSig_v_ddi = makeSig([kWasmF64, kWasmF64, kWasmI32], []);
|
|
let kSig_ii_v = makeSig([], [kWasmI32, kWasmI32]);
|
|
let kSig_iii_v = makeSig([], [kWasmI32, kWasmI32, kWasmI32]);
|
|
let kSig_ii_i = makeSig([kWasmI32], [kWasmI32, kWasmI32]);
|
|
let kSig_iii_i = makeSig([kWasmI32], [kWasmI32, kWasmI32, kWasmI32]);
|
|
let kSig_ii_ii = makeSig([kWasmI32, kWasmI32], [kWasmI32, kWasmI32]);
|
|
let kSig_iii_ii = makeSig([kWasmI32, kWasmI32], [kWasmI32, kWasmI32, kWasmI32]);
|
|
|
|
let kSig_v_f = makeSig([kWasmF32], []);
|
|
let kSig_f_f = makeSig([kWasmF32], [kWasmF32]);
|
|
let kSig_f_d = makeSig([kWasmF64], [kWasmF32]);
|
|
let kSig_d_d = makeSig([kWasmF64], [kWasmF64]);
|
|
let kSig_r_r = makeSig([kWasmAnyRef], [kWasmAnyRef]);
|
|
let kSig_a_a = makeSig([kWasmAnyFunc], [kWasmAnyFunc]);
|
|
let kSig_e_e = makeSig([kWasmExnRef], [kWasmExnRef]);
|
|
let kSig_i_r = makeSig([kWasmAnyRef], [kWasmI32]);
|
|
let kSig_v_r = makeSig([kWasmAnyRef], []);
|
|
let kSig_v_a = makeSig([kWasmAnyFunc], []);
|
|
let kSig_v_e = makeSig([kWasmExnRef], []);
|
|
let kSig_v_rr = makeSig([kWasmAnyRef, kWasmAnyRef], []);
|
|
let kSig_v_aa = makeSig([kWasmAnyFunc, kWasmAnyFunc], []);
|
|
let kSig_r_v = makeSig([], [kWasmAnyRef]);
|
|
let kSig_a_v = makeSig([], [kWasmAnyFunc]);
|
|
let kSig_a_i = makeSig([kWasmI32], [kWasmAnyFunc]);
|
|
let kSig_e_v = makeSig([], [kWasmExnRef]);
|
|
|
|
function makeSig(params, results) {
|
|
return {params: params, results: results};
|
|
}
|
|
|
|
function makeSig_v_x(x) {
|
|
return makeSig([x], []);
|
|
}
|
|
|
|
function makeSig_v_xx(x) {
|
|
return makeSig([x, x], []);
|
|
}
|
|
|
|
function makeSig_r_v(r) {
|
|
return makeSig([], [r]);
|
|
}
|
|
|
|
function makeSig_r_x(r, x) {
|
|
return makeSig([x], [r]);
|
|
}
|
|
|
|
function makeSig_r_xx(r, x) {
|
|
return makeSig([x, x], [r]);
|
|
}
|
|
|
|
// Opcodes
|
|
let kExprUnreachable = 0x00;
|
|
let kExprNop = 0x01;
|
|
let kExprBlock = 0x02;
|
|
let kExprLoop = 0x03;
|
|
let kExprIf = 0x04;
|
|
let kExprElse = 0x05;
|
|
let kExprTry = 0x06;
|
|
let kExprCatch = 0x07;
|
|
let kExprThrow = 0x08;
|
|
let kExprRethrow = 0x09;
|
|
let kExprBrOnExn = 0x0a;
|
|
let kExprEnd = 0x0b;
|
|
let kExprBr = 0x0c;
|
|
let kExprBrIf = 0x0d;
|
|
let kExprBrTable = 0x0e;
|
|
let kExprReturn = 0x0f;
|
|
let kExprCallFunction = 0x10;
|
|
let kExprCallIndirect = 0x11;
|
|
let kExprReturnCall = 0x12;
|
|
let kExprReturnCallIndirect = 0x13;
|
|
let kExprDrop = 0x1a;
|
|
let kExprSelect = 0x1b;
|
|
let kExprGetLocal = 0x20;
|
|
let kExprSetLocal = 0x21;
|
|
let kExprTeeLocal = 0x22;
|
|
let kExprGetGlobal = 0x23;
|
|
let kExprSetGlobal = 0x24;
|
|
let kExprTableGet = 0x25;
|
|
let kExprTableSet = 0x26;
|
|
let kExprI32LoadMem = 0x28;
|
|
let kExprI64LoadMem = 0x29;
|
|
let kExprF32LoadMem = 0x2a;
|
|
let kExprF64LoadMem = 0x2b;
|
|
let kExprI32LoadMem8S = 0x2c;
|
|
let kExprI32LoadMem8U = 0x2d;
|
|
let kExprI32LoadMem16S = 0x2e;
|
|
let kExprI32LoadMem16U = 0x2f;
|
|
let kExprI64LoadMem8S = 0x30;
|
|
let kExprI64LoadMem8U = 0x31;
|
|
let kExprI64LoadMem16S = 0x32;
|
|
let kExprI64LoadMem16U = 0x33;
|
|
let kExprI64LoadMem32S = 0x34;
|
|
let kExprI64LoadMem32U = 0x35;
|
|
let kExprI32StoreMem = 0x36;
|
|
let kExprI64StoreMem = 0x37;
|
|
let kExprF32StoreMem = 0x38;
|
|
let kExprF64StoreMem = 0x39;
|
|
let kExprI32StoreMem8 = 0x3a;
|
|
let kExprI32StoreMem16 = 0x3b;
|
|
let kExprI64StoreMem8 = 0x3c;
|
|
let kExprI64StoreMem16 = 0x3d;
|
|
let kExprI64StoreMem32 = 0x3e;
|
|
let kExprMemorySize = 0x3f;
|
|
let kExprMemoryGrow = 0x40;
|
|
let kExprI32Const = 0x41;
|
|
let kExprI64Const = 0x42;
|
|
let kExprF32Const = 0x43;
|
|
let kExprF64Const = 0x44;
|
|
let kExprI32Eqz = 0x45;
|
|
let kExprI32Eq = 0x46;
|
|
let kExprI32Ne = 0x47;
|
|
let kExprI32LtS = 0x48;
|
|
let kExprI32LtU = 0x49;
|
|
let kExprI32GtS = 0x4a;
|
|
let kExprI32GtU = 0x4b;
|
|
let kExprI32LeS = 0x4c;
|
|
let kExprI32LeU = 0x4d;
|
|
let kExprI32GeS = 0x4e;
|
|
let kExprI32GeU = 0x4f;
|
|
let kExprI64Eqz = 0x50;
|
|
let kExprI64Eq = 0x51;
|
|
let kExprI64Ne = 0x52;
|
|
let kExprI64LtS = 0x53;
|
|
let kExprI64LtU = 0x54;
|
|
let kExprI64GtS = 0x55;
|
|
let kExprI64GtU = 0x56;
|
|
let kExprI64LeS = 0x57;
|
|
let kExprI64LeU = 0x58;
|
|
let kExprI64GeS = 0x59;
|
|
let kExprI64GeU = 0x5a;
|
|
let kExprF32Eq = 0x5b;
|
|
let kExprF32Ne = 0x5c;
|
|
let kExprF32Lt = 0x5d;
|
|
let kExprF32Gt = 0x5e;
|
|
let kExprF32Le = 0x5f;
|
|
let kExprF32Ge = 0x60;
|
|
let kExprF64Eq = 0x61;
|
|
let kExprF64Ne = 0x62;
|
|
let kExprF64Lt = 0x63;
|
|
let kExprF64Gt = 0x64;
|
|
let kExprF64Le = 0x65;
|
|
let kExprF64Ge = 0x66;
|
|
let kExprI32Clz = 0x67;
|
|
let kExprI32Ctz = 0x68;
|
|
let kExprI32Popcnt = 0x69;
|
|
let kExprI32Add = 0x6a;
|
|
let kExprI32Sub = 0x6b;
|
|
let kExprI32Mul = 0x6c;
|
|
let kExprI32DivS = 0x6d;
|
|
let kExprI32DivU = 0x6e;
|
|
let kExprI32RemS = 0x6f;
|
|
let kExprI32RemU = 0x70;
|
|
let kExprI32And = 0x71;
|
|
let kExprI32Ior = 0x72;
|
|
let kExprI32Xor = 0x73;
|
|
let kExprI32Shl = 0x74;
|
|
let kExprI32ShrS = 0x75;
|
|
let kExprI32ShrU = 0x76;
|
|
let kExprI32Rol = 0x77;
|
|
let kExprI32Ror = 0x78;
|
|
let kExprI64Clz = 0x79;
|
|
let kExprI64Ctz = 0x7a;
|
|
let kExprI64Popcnt = 0x7b;
|
|
let kExprI64Add = 0x7c;
|
|
let kExprI64Sub = 0x7d;
|
|
let kExprI64Mul = 0x7e;
|
|
let kExprI64DivS = 0x7f;
|
|
let kExprI64DivU = 0x80;
|
|
let kExprI64RemS = 0x81;
|
|
let kExprI64RemU = 0x82;
|
|
let kExprI64And = 0x83;
|
|
let kExprI64Ior = 0x84;
|
|
let kExprI64Xor = 0x85;
|
|
let kExprI64Shl = 0x86;
|
|
let kExprI64ShrS = 0x87;
|
|
let kExprI64ShrU = 0x88;
|
|
let kExprI64Rol = 0x89;
|
|
let kExprI64Ror = 0x8a;
|
|
let kExprF32Abs = 0x8b;
|
|
let kExprF32Neg = 0x8c;
|
|
let kExprF32Ceil = 0x8d;
|
|
let kExprF32Floor = 0x8e;
|
|
let kExprF32Trunc = 0x8f;
|
|
let kExprF32NearestInt = 0x90;
|
|
let kExprF32Sqrt = 0x91;
|
|
let kExprF32Add = 0x92;
|
|
let kExprF32Sub = 0x93;
|
|
let kExprF32Mul = 0x94;
|
|
let kExprF32Div = 0x95;
|
|
let kExprF32Min = 0x96;
|
|
let kExprF32Max = 0x97;
|
|
let kExprF32CopySign = 0x98;
|
|
let kExprF64Abs = 0x99;
|
|
let kExprF64Neg = 0x9a;
|
|
let kExprF64Ceil = 0x9b;
|
|
let kExprF64Floor = 0x9c;
|
|
let kExprF64Trunc = 0x9d;
|
|
let kExprF64NearestInt = 0x9e;
|
|
let kExprF64Sqrt = 0x9f;
|
|
let kExprF64Add = 0xa0;
|
|
let kExprF64Sub = 0xa1;
|
|
let kExprF64Mul = 0xa2;
|
|
let kExprF64Div = 0xa3;
|
|
let kExprF64Min = 0xa4;
|
|
let kExprF64Max = 0xa5;
|
|
let kExprF64CopySign = 0xa6;
|
|
let kExprI32ConvertI64 = 0xa7;
|
|
let kExprI32SConvertF32 = 0xa8;
|
|
let kExprI32UConvertF32 = 0xa9;
|
|
let kExprI32SConvertF64 = 0xaa;
|
|
let kExprI32UConvertF64 = 0xab;
|
|
let kExprI64SConvertI32 = 0xac;
|
|
let kExprI64UConvertI32 = 0xad;
|
|
let kExprI64SConvertF32 = 0xae;
|
|
let kExprI64UConvertF32 = 0xaf;
|
|
let kExprI64SConvertF64 = 0xb0;
|
|
let kExprI64UConvertF64 = 0xb1;
|
|
let kExprF32SConvertI32 = 0xb2;
|
|
let kExprF32UConvertI32 = 0xb3;
|
|
let kExprF32SConvertI64 = 0xb4;
|
|
let kExprF32UConvertI64 = 0xb5;
|
|
let kExprF32ConvertF64 = 0xb6;
|
|
let kExprF64SConvertI32 = 0xb7;
|
|
let kExprF64UConvertI32 = 0xb8;
|
|
let kExprF64SConvertI64 = 0xb9;
|
|
let kExprF64UConvertI64 = 0xba;
|
|
let kExprF64ConvertF32 = 0xbb;
|
|
let kExprI32ReinterpretF32 = 0xbc;
|
|
let kExprI64ReinterpretF64 = 0xbd;
|
|
let kExprF32ReinterpretI32 = 0xbe;
|
|
let kExprF64ReinterpretI64 = 0xbf;
|
|
let kExprI32SExtendI8 = 0xc0;
|
|
let kExprI32SExtendI16 = 0xc1;
|
|
let kExprI64SExtendI8 = 0xc2;
|
|
let kExprI64SExtendI16 = 0xc3;
|
|
let kExprI64SExtendI32 = 0xc4;
|
|
let kExprRefNull = 0xd0;
|
|
let kExprRefIsNull = 0xd1;
|
|
let kExprRefFunc = 0xd2;
|
|
|
|
// Prefix opcodes
|
|
let kNumericPrefix = 0xfc;
|
|
let kSimdPrefix = 0xfd;
|
|
let kAtomicPrefix = 0xfe;
|
|
|
|
// Numeric opcodes.
|
|
let kExprMemoryInit = 0x08;
|
|
let kExprDataDrop = 0x09;
|
|
let kExprMemoryCopy = 0x0a;
|
|
let kExprMemoryFill = 0x0b;
|
|
let kExprTableInit = 0x0c;
|
|
let kExprElemDrop = 0x0d;
|
|
let kExprTableCopy = 0x0e;
|
|
let kExprTableGrow = 0x0f;
|
|
let kExprTableSize = 0x10;
|
|
let kExprTableFill = 0x11;
|
|
|
|
// Atomic opcodes.
|
|
let kExprAtomicNotify = 0x00;
|
|
let kExprI32AtomicWait = 0x01;
|
|
let kExprI64AtomicWait = 0x02;
|
|
let kExprI32AtomicLoad = 0x10;
|
|
let kExprI32AtomicLoad8U = 0x12;
|
|
let kExprI32AtomicLoad16U = 0x13;
|
|
let kExprI32AtomicStore = 0x17;
|
|
let kExprI32AtomicStore8U = 0x19;
|
|
let kExprI32AtomicStore16U = 0x1a;
|
|
let kExprI32AtomicAdd = 0x1e;
|
|
let kExprI32AtomicAdd8U = 0x20;
|
|
let kExprI32AtomicAdd16U = 0x21;
|
|
let kExprI32AtomicSub = 0x25;
|
|
let kExprI32AtomicSub8U = 0x27;
|
|
let kExprI32AtomicSub16U = 0x28;
|
|
let kExprI32AtomicAnd = 0x2c;
|
|
let kExprI32AtomicAnd8U = 0x2e;
|
|
let kExprI32AtomicAnd16U = 0x2f;
|
|
let kExprI32AtomicOr = 0x33;
|
|
let kExprI32AtomicOr8U = 0x35;
|
|
let kExprI32AtomicOr16U = 0x36;
|
|
let kExprI32AtomicXor = 0x3a;
|
|
let kExprI32AtomicXor8U = 0x3c;
|
|
let kExprI32AtomicXor16U = 0x3d;
|
|
let kExprI32AtomicExchange = 0x41;
|
|
let kExprI32AtomicExchange8U = 0x43;
|
|
let kExprI32AtomicExchange16U = 0x44;
|
|
let kExprI32AtomicCompareExchange = 0x48;
|
|
let kExprI32AtomicCompareExchange8U = 0x4a;
|
|
let kExprI32AtomicCompareExchange16U = 0x4b;
|
|
|
|
let kExprI64AtomicLoad = 0x11;
|
|
let kExprI64AtomicLoad8U = 0x14;
|
|
let kExprI64AtomicLoad16U = 0x15;
|
|
let kExprI64AtomicLoad32U = 0x16;
|
|
let kExprI64AtomicStore = 0x18;
|
|
let kExprI64AtomicStore8U = 0x1b;
|
|
let kExprI64AtomicStore16U = 0x1c;
|
|
let kExprI64AtomicStore32U = 0x1d;
|
|
let kExprI64AtomicAdd = 0x1f;
|
|
let kExprI64AtomicAdd8U = 0x22;
|
|
let kExprI64AtomicAdd16U = 0x23;
|
|
let kExprI64AtomicAdd32U = 0x24;
|
|
let kExprI64AtomicSub = 0x26;
|
|
let kExprI64AtomicSub8U = 0x29;
|
|
let kExprI64AtomicSub16U = 0x2a;
|
|
let kExprI64AtomicSub32U = 0x2b;
|
|
let kExprI64AtomicAnd = 0x2d;
|
|
let kExprI64AtomicAnd8U = 0x30;
|
|
let kExprI64AtomicAnd16U = 0x31;
|
|
let kExprI64AtomicAnd32U = 0x32;
|
|
let kExprI64AtomicOr = 0x34;
|
|
let kExprI64AtomicOr8U = 0x37;
|
|
let kExprI64AtomicOr16U = 0x38;
|
|
let kExprI64AtomicOr32U = 0x39;
|
|
let kExprI64AtomicXor = 0x3b;
|
|
let kExprI64AtomicXor8U = 0x3e;
|
|
let kExprI64AtomicXor16U = 0x3f;
|
|
let kExprI64AtomicXor32U = 0x40;
|
|
let kExprI64AtomicExchange = 0x42;
|
|
let kExprI64AtomicExchange8U = 0x45;
|
|
let kExprI64AtomicExchange16U = 0x46;
|
|
let kExprI64AtomicExchange32U = 0x47;
|
|
let kExprI64AtomicCompareExchange = 0x49
|
|
let kExprI64AtomicCompareExchange8U = 0x4c;
|
|
let kExprI64AtomicCompareExchange16U = 0x4d;
|
|
let kExprI64AtomicCompareExchange32U = 0x4e;
|
|
|
|
// Simd opcodes.
|
|
let kExprF32x4Min = 0x9e;
|
|
|
|
// Compilation hint constants.
|
|
let kCompilationHintStrategyDefault = 0x00;
|
|
let kCompilationHintStrategyLazy = 0x01;
|
|
let kCompilationHintStrategyEager = 0x02;
|
|
let kCompilationHintStrategyLazyBaselineEagerTopTier = 0x03;
|
|
let kCompilationHintTierDefault = 0x00;
|
|
let kCompilationHintTierInterpreter = 0x01;
|
|
let kCompilationHintTierBaseline = 0x02;
|
|
let kCompilationHintTierOptimized = 0x03;
|
|
|
|
let kTrapUnreachable = 0;
|
|
let kTrapMemOutOfBounds = 1;
|
|
let kTrapDivByZero = 2;
|
|
let kTrapDivUnrepresentable = 3;
|
|
let kTrapRemByZero = 4;
|
|
let kTrapFloatUnrepresentable = 5;
|
|
let kTrapFuncInvalid = 6;
|
|
let kTrapFuncSigMismatch = 7;
|
|
let kTrapTypeError = 8;
|
|
let kTrapUnalignedAccess = 9;
|
|
let kTrapDataSegmentDropped = 10;
|
|
let kTrapElemSegmentDropped = 11;
|
|
let kTrapTableOutOfBounds = 12;
|
|
|
|
let kTrapMsgs = [
|
|
"unreachable",
|
|
"memory access out of bounds",
|
|
"divide by zero",
|
|
"divide result unrepresentable",
|
|
"remainder by zero",
|
|
"float unrepresentable in integer range",
|
|
"invalid index into function table",
|
|
"function signature mismatch",
|
|
"wasm function signature contains illegal type",
|
|
"operation does not support unaligned accesses",
|
|
"data segment has been dropped",
|
|
"element segment has been dropped",
|
|
"table access out of bounds"
|
|
];
|
|
|
|
function assertTraps(trap, code) {
|
|
assertThrows(code, WebAssembly.RuntimeError, kTrapMsgs[trap]);
|
|
}
|
|
|
|
class Binary {
|
|
constructor() {
|
|
this.length = 0;
|
|
this.buffer = new Uint8Array(8192);
|
|
}
|
|
|
|
ensure_space(needed) {
|
|
if (this.buffer.length - this.length >= needed) return;
|
|
let new_capacity = this.buffer.length * 2;
|
|
while (new_capacity - this.length < needed) new_capacity *= 2;
|
|
let new_buffer = new Uint8Array(new_capacity);
|
|
new_buffer.set(this.buffer);
|
|
this.buffer = new_buffer;
|
|
}
|
|
|
|
trunc_buffer() {
|
|
return new Uint8Array(this.buffer.buffer, 0, this.length);
|
|
}
|
|
|
|
reset() {
|
|
this.length = 0;
|
|
}
|
|
|
|
emit_u8(val) {
|
|
this.ensure_space(1);
|
|
this.buffer[this.length++] = val;
|
|
}
|
|
|
|
emit_u16(val) {
|
|
this.ensure_space(2);
|
|
this.buffer[this.length++] = val;
|
|
this.buffer[this.length++] = val >> 8;
|
|
}
|
|
|
|
emit_u32(val) {
|
|
this.ensure_space(4);
|
|
this.buffer[this.length++] = val;
|
|
this.buffer[this.length++] = val >> 8;
|
|
this.buffer[this.length++] = val >> 16;
|
|
this.buffer[this.length++] = val >> 24;
|
|
}
|
|
|
|
emit_leb_u(val, max_len) {
|
|
this.ensure_space(max_len);
|
|
for (let i = 0; i < max_len; ++i) {
|
|
let v = val & 0xff;
|
|
val = val >>> 7;
|
|
if (val == 0) {
|
|
this.buffer[this.length++] = v;
|
|
return;
|
|
}
|
|
this.buffer[this.length++] = v | 0x80;
|
|
}
|
|
throw new Error("Leb value exceeds maximum length of " + max_len);
|
|
}
|
|
|
|
emit_u32v(val) {
|
|
this.emit_leb_u(val, kMaxVarInt32Size);
|
|
}
|
|
|
|
emit_u64v(val) {
|
|
this.emit_leb_u(val, kMaxVarInt64Size);
|
|
}
|
|
|
|
emit_bytes(data) {
|
|
this.ensure_space(data.length);
|
|
this.buffer.set(data, this.length);
|
|
this.length += data.length;
|
|
}
|
|
|
|
emit_string(string) {
|
|
// When testing illegal names, we pass a byte array directly.
|
|
if (string instanceof Array) {
|
|
this.emit_u32v(string.length);
|
|
this.emit_bytes(string);
|
|
return;
|
|
}
|
|
|
|
// This is the hacky way to convert a JavaScript string to a UTF8 encoded
|
|
// string only containing single-byte characters.
|
|
let string_utf8 = unescape(encodeURIComponent(string));
|
|
this.emit_u32v(string_utf8.length);
|
|
for (let i = 0; i < string_utf8.length; i++) {
|
|
this.emit_u8(string_utf8.charCodeAt(i));
|
|
}
|
|
}
|
|
|
|
emit_header() {
|
|
this.emit_bytes([
|
|
kWasmH0, kWasmH1, kWasmH2, kWasmH3, kWasmV0, kWasmV1, kWasmV2, kWasmV3
|
|
]);
|
|
}
|
|
|
|
emit_section(section_code, content_generator) {
|
|
// Emit section name.
|
|
this.emit_u8(section_code);
|
|
// Emit the section to a temporary buffer: its full length isn't know yet.
|
|
const section = new Binary;
|
|
content_generator(section);
|
|
// Emit section length.
|
|
this.emit_u32v(section.length);
|
|
// Copy the temporary buffer.
|
|
// Avoid spread because {section} can be huge.
|
|
this.emit_bytes(section.trunc_buffer());
|
|
}
|
|
}
|
|
|
|
class WasmFunctionBuilder {
|
|
constructor(module, name, type_index) {
|
|
this.module = module;
|
|
this.name = name;
|
|
this.type_index = type_index;
|
|
this.body = [];
|
|
this.locals = [];
|
|
this.local_names = [];
|
|
}
|
|
|
|
numLocalNames() {
|
|
let num_local_names = 0;
|
|
for (let loc_name of this.local_names) {
|
|
if (loc_name !== undefined) ++num_local_names;
|
|
}
|
|
return num_local_names;
|
|
}
|
|
|
|
exportAs(name) {
|
|
this.module.addExport(name, this.index);
|
|
return this;
|
|
}
|
|
|
|
exportFunc() {
|
|
this.exportAs(this.name);
|
|
return this;
|
|
}
|
|
|
|
setCompilationHint(strategy, baselineTier, topTier) {
|
|
this.module.setCompilationHint(strategy, baselineTier, topTier, this.index);
|
|
return this;
|
|
}
|
|
|
|
addBody(body) {
|
|
for (let b of body) {
|
|
if (typeof b !== 'number' || (b & (~0xFF)) !== 0 )
|
|
throw new Error('invalid body (entries must be 8 bit numbers): ' + body);
|
|
}
|
|
this.body = body.slice();
|
|
// Automatically add the end for the function block to the body.
|
|
this.body.push(kExprEnd);
|
|
return this;
|
|
}
|
|
|
|
addBodyWithEnd(body) {
|
|
this.body = body;
|
|
return this;
|
|
}
|
|
|
|
getNumLocals() {
|
|
let total_locals = 0;
|
|
for (let l of this.locals) {
|
|
for (let type of ["i32", "i64", "f32", "f64", "s128"]) {
|
|
total_locals += l[type + "_count"] || 0;
|
|
}
|
|
}
|
|
return total_locals;
|
|
}
|
|
|
|
addLocals(locals, names) {
|
|
const old_num_locals = this.getNumLocals();
|
|
this.locals.push(locals);
|
|
if (names) {
|
|
const missing_names = old_num_locals - this.local_names.length;
|
|
this.local_names.push(...new Array(missing_names), ...names);
|
|
}
|
|
return this;
|
|
}
|
|
|
|
end() {
|
|
return this.module;
|
|
}
|
|
}
|
|
|
|
class WasmGlobalBuilder {
|
|
constructor(module, type, mutable) {
|
|
this.module = module;
|
|
this.type = type;
|
|
this.mutable = mutable;
|
|
this.init = 0;
|
|
}
|
|
|
|
exportAs(name) {
|
|
this.module.exports.push({name: name, kind: kExternalGlobal,
|
|
index: this.index});
|
|
return this;
|
|
}
|
|
}
|
|
|
|
class WasmTableBuilder {
|
|
constructor(module, type, initial_size, max_size) {
|
|
this.module = module;
|
|
this.type = type;
|
|
this.initial_size = initial_size;
|
|
this.has_max = max_size != undefined;
|
|
this.max_size = max_size;
|
|
}
|
|
|
|
exportAs(name) {
|
|
this.module.exports.push({name: name, kind: kExternalTable,
|
|
index: this.index});
|
|
return this;
|
|
}
|
|
}
|
|
|
|
class WasmModuleBuilder {
|
|
constructor() {
|
|
this.types = [];
|
|
this.imports = [];
|
|
this.exports = [];
|
|
this.globals = [];
|
|
this.tables = [];
|
|
this.exceptions = [];
|
|
this.functions = [];
|
|
this.compilation_hints = [];
|
|
this.element_segments = [];
|
|
this.data_segments = [];
|
|
this.explicit = [];
|
|
this.num_imported_funcs = 0;
|
|
this.num_imported_globals = 0;
|
|
this.num_imported_tables = 0;
|
|
this.num_imported_exceptions = 0;
|
|
return this;
|
|
}
|
|
|
|
addStart(start_index) {
|
|
this.start_index = start_index;
|
|
return this;
|
|
}
|
|
|
|
addMemory(min, max, exp, shared) {
|
|
this.memory = {min: min, max: max, exp: exp, shared: shared};
|
|
return this;
|
|
}
|
|
|
|
addExplicitSection(bytes) {
|
|
this.explicit.push(bytes);
|
|
return this;
|
|
}
|
|
|
|
stringToBytes(name) {
|
|
var result = new Binary();
|
|
result.emit_u32v(name.length);
|
|
for (var i = 0; i < name.length; i++) {
|
|
result.emit_u8(name.charCodeAt(i));
|
|
}
|
|
return result.trunc_buffer()
|
|
}
|
|
|
|
createCustomSection(name, bytes) {
|
|
name = this.stringToBytes(name);
|
|
var section = new Binary();
|
|
section.emit_u8(0);
|
|
section.emit_u32v(name.length + bytes.length);
|
|
section.emit_bytes(name);
|
|
section.emit_bytes(bytes);
|
|
return section.trunc_buffer();
|
|
}
|
|
|
|
addCustomSection(name, bytes) {
|
|
this.explicit.push(this.createCustomSection(name, bytes));
|
|
}
|
|
|
|
addType(type) {
|
|
this.types.push(type);
|
|
var pl = type.params.length; // should have params
|
|
var rl = type.results.length; // should have results
|
|
return this.types.length - 1;
|
|
}
|
|
|
|
addGlobal(local_type, mutable) {
|
|
let glob = new WasmGlobalBuilder(this, local_type, mutable);
|
|
glob.index = this.globals.length + this.num_imported_globals;
|
|
this.globals.push(glob);
|
|
return glob;
|
|
}
|
|
|
|
addTable(type, initial_size, max_size = undefined) {
|
|
if (type != kWasmAnyRef && type != kWasmAnyFunc) {
|
|
throw new Error('Tables must be of type kWasmAnyRef or kWasmAnyFunc');
|
|
}
|
|
let table = new WasmTableBuilder(this, type, initial_size, max_size);
|
|
table.index = this.tables.length + this.num_imported_tables;
|
|
this.tables.push(table);
|
|
return table;
|
|
}
|
|
|
|
addException(type) {
|
|
let type_index = (typeof type) == "number" ? type : this.addType(type);
|
|
let except_index = this.exceptions.length + this.num_imported_exceptions;
|
|
this.exceptions.push(type_index);
|
|
return except_index;
|
|
}
|
|
|
|
addFunction(name, type) {
|
|
let type_index = (typeof type) == "number" ? type : this.addType(type);
|
|
let func = new WasmFunctionBuilder(this, name, type_index);
|
|
func.index = this.functions.length + this.num_imported_funcs;
|
|
this.functions.push(func);
|
|
return func;
|
|
}
|
|
|
|
addImport(module, name, type) {
|
|
if (this.functions.length != 0) {
|
|
throw new Error('Imported functions must be declared before local ones');
|
|
}
|
|
let type_index = (typeof type) == "number" ? type : this.addType(type);
|
|
this.imports.push({module: module, name: name, kind: kExternalFunction,
|
|
type: type_index});
|
|
return this.num_imported_funcs++;
|
|
}
|
|
|
|
addImportedGlobal(module, name, type, mutable = false) {
|
|
if (this.globals.length != 0) {
|
|
throw new Error('Imported globals must be declared before local ones');
|
|
}
|
|
let o = {module: module, name: name, kind: kExternalGlobal, type: type,
|
|
mutable: mutable};
|
|
this.imports.push(o);
|
|
return this.num_imported_globals++;
|
|
}
|
|
|
|
addImportedMemory(module, name, initial = 0, maximum, shared) {
|
|
let o = {module: module, name: name, kind: kExternalMemory,
|
|
initial: initial, maximum: maximum, shared: shared};
|
|
this.imports.push(o);
|
|
return this;
|
|
}
|
|
|
|
addImportedTable(module, name, initial, maximum, type) {
|
|
if (this.tables.length != 0) {
|
|
throw new Error('Imported tables must be declared before local ones');
|
|
}
|
|
let o = {module: module, name: name, kind: kExternalTable, initial: initial,
|
|
maximum: maximum, type: type || kWasmAnyFunctionTypeForm};
|
|
this.imports.push(o);
|
|
return this.num_imported_tables++;
|
|
}
|
|
|
|
addImportedException(module, name, type) {
|
|
if (this.exceptions.length != 0) {
|
|
throw new Error('Imported exceptions must be declared before local ones');
|
|
}
|
|
let type_index = (typeof type) == "number" ? type : this.addType(type);
|
|
let o = {module: module, name: name, kind: kExternalException, type: type_index};
|
|
this.imports.push(o);
|
|
return this.num_imported_exceptions++;
|
|
}
|
|
|
|
addExport(name, index) {
|
|
this.exports.push({name: name, kind: kExternalFunction, index: index});
|
|
return this;
|
|
}
|
|
|
|
addExportOfKind(name, kind, index) {
|
|
this.exports.push({name: name, kind: kind, index: index});
|
|
return this;
|
|
}
|
|
|
|
setCompilationHint(strategy, baselineTier, topTier, index) {
|
|
this.compilation_hints[index] = {strategy: strategy, baselineTier:
|
|
baselineTier, topTier: topTier};
|
|
return this;
|
|
}
|
|
|
|
addDataSegment(addr, data, is_global = false) {
|
|
this.data_segments.push(
|
|
{addr: addr, data: data, is_global: is_global, is_active: true});
|
|
return this.data_segments.length - 1;
|
|
}
|
|
|
|
addPassiveDataSegment(data) {
|
|
this.data_segments.push({data: data, is_active: false});
|
|
return this.data_segments.length - 1;
|
|
}
|
|
|
|
exportMemoryAs(name) {
|
|
this.exports.push({name: name, kind: kExternalMemory, index: 0});
|
|
}
|
|
|
|
addElementSegment(table, base, is_global, array) {
|
|
this.element_segments.push({table: table, base: base, is_global: is_global,
|
|
array: array, is_active: true});
|
|
return this;
|
|
}
|
|
|
|
addPassiveElementSegment(array, is_import = false) {
|
|
this.element_segments.push({array: array, is_active: false});
|
|
return this;
|
|
}
|
|
|
|
appendToTable(array) {
|
|
for (let n of array) {
|
|
if (typeof n != 'number')
|
|
throw new Error('invalid table (entries have to be numbers): ' + array);
|
|
}
|
|
if (this.tables.length == 0) {
|
|
this.addTable(kWasmAnyFunc, 0);
|
|
}
|
|
// Adjust the table to the correct size.
|
|
let table = this.tables[0];
|
|
const base = table.initial_size;
|
|
const table_size = base + array.length;
|
|
table.initial_size = table_size;
|
|
if (table.has_max && table_size > table.max_size) {
|
|
table.max_size = table_size;
|
|
}
|
|
return this.addElementSegment(0, base, false, array);
|
|
}
|
|
|
|
setTableBounds(min, max = undefined) {
|
|
if (this.tables.length != 0) {
|
|
throw new Error("The table bounds of table '0' have already been set.");
|
|
}
|
|
this.addTable(kWasmAnyFunc, min, max);
|
|
return this;
|
|
}
|
|
|
|
setName(name) {
|
|
this.name = name;
|
|
return this;
|
|
}
|
|
|
|
toBuffer(debug = false) {
|
|
let binary = new Binary;
|
|
let wasm = this;
|
|
|
|
// Add header
|
|
binary.emit_header();
|
|
|
|
// Add type section
|
|
if (wasm.types.length > 0) {
|
|
if (debug) print("emitting types @ " + binary.length);
|
|
binary.emit_section(kTypeSectionCode, section => {
|
|
section.emit_u32v(wasm.types.length);
|
|
for (let type of wasm.types) {
|
|
section.emit_u8(kWasmFunctionTypeForm);
|
|
section.emit_u32v(type.params.length);
|
|
for (let param of type.params) {
|
|
section.emit_u8(param);
|
|
}
|
|
section.emit_u32v(type.results.length);
|
|
for (let result of type.results) {
|
|
section.emit_u8(result);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
// Add imports section
|
|
if (wasm.imports.length > 0) {
|
|
if (debug) print("emitting imports @ " + binary.length);
|
|
binary.emit_section(kImportSectionCode, section => {
|
|
section.emit_u32v(wasm.imports.length);
|
|
for (let imp of wasm.imports) {
|
|
section.emit_string(imp.module);
|
|
section.emit_string(imp.name || '');
|
|
section.emit_u8(imp.kind);
|
|
if (imp.kind == kExternalFunction) {
|
|
section.emit_u32v(imp.type);
|
|
} else if (imp.kind == kExternalGlobal) {
|
|
section.emit_u32v(imp.type);
|
|
section.emit_u8(imp.mutable);
|
|
} else if (imp.kind == kExternalMemory) {
|
|
var has_max = (typeof imp.maximum) != "undefined";
|
|
var is_shared = (typeof imp.shared) != "undefined";
|
|
if (is_shared) {
|
|
section.emit_u8(has_max ? 3 : 2); // flags
|
|
} else {
|
|
section.emit_u8(has_max ? 1 : 0); // flags
|
|
}
|
|
section.emit_u32v(imp.initial); // initial
|
|
if (has_max) section.emit_u32v(imp.maximum); // maximum
|
|
} else if (imp.kind == kExternalTable) {
|
|
section.emit_u8(imp.type);
|
|
var has_max = (typeof imp.maximum) != "undefined";
|
|
section.emit_u8(has_max ? 1 : 0); // flags
|
|
section.emit_u32v(imp.initial); // initial
|
|
if (has_max) section.emit_u32v(imp.maximum); // maximum
|
|
} else if (imp.kind == kExternalException) {
|
|
section.emit_u32v(kExceptionAttribute);
|
|
section.emit_u32v(imp.type);
|
|
} else {
|
|
throw new Error("unknown/unsupported import kind " + imp.kind);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
// Add functions declarations
|
|
if (wasm.functions.length > 0) {
|
|
if (debug) print("emitting function decls @ " + binary.length);
|
|
binary.emit_section(kFunctionSectionCode, section => {
|
|
section.emit_u32v(wasm.functions.length);
|
|
for (let func of wasm.functions) {
|
|
section.emit_u32v(func.type_index);
|
|
}
|
|
});
|
|
}
|
|
|
|
// Add table section
|
|
if (wasm.tables.length > 0) {
|
|
if (debug) print ("emitting tables @ " + binary.length);
|
|
binary.emit_section(kTableSectionCode, section => {
|
|
section.emit_u32v(wasm.tables.length);
|
|
for (let table of wasm.tables) {
|
|
section.emit_u8(table.type);
|
|
section.emit_u8(table.has_max);
|
|
section.emit_u32v(table.initial_size);
|
|
if (table.has_max) section.emit_u32v(table.max_size);
|
|
}
|
|
});
|
|
}
|
|
|
|
// Add memory section
|
|
if (wasm.memory !== undefined) {
|
|
if (debug) print("emitting memory @ " + binary.length);
|
|
binary.emit_section(kMemorySectionCode, section => {
|
|
section.emit_u8(1); // one memory entry
|
|
const has_max = wasm.memory.max !== undefined;
|
|
const is_shared = wasm.memory.shared !== undefined;
|
|
// Emit flags (bit 0: reszeable max, bit 1: shared memory)
|
|
if (is_shared) {
|
|
section.emit_u8(has_max ? kSharedHasMaximumFlag : 2);
|
|
} else {
|
|
section.emit_u8(has_max ? kHasMaximumFlag : 0);
|
|
}
|
|
section.emit_u32v(wasm.memory.min);
|
|
if (has_max) section.emit_u32v(wasm.memory.max);
|
|
});
|
|
}
|
|
|
|
// Add global section.
|
|
if (wasm.globals.length > 0) {
|
|
if (debug) print ("emitting globals @ " + binary.length);
|
|
binary.emit_section(kGlobalSectionCode, section => {
|
|
section.emit_u32v(wasm.globals.length);
|
|
for (let global of wasm.globals) {
|
|
section.emit_u8(global.type);
|
|
section.emit_u8(global.mutable);
|
|
if ((typeof global.init_index) == "undefined") {
|
|
// Emit a constant initializer.
|
|
switch (global.type) {
|
|
case kWasmI32:
|
|
section.emit_u8(kExprI32Const);
|
|
section.emit_u32v(global.init);
|
|
break;
|
|
case kWasmI64:
|
|
section.emit_u8(kExprI64Const);
|
|
section.emit_u64v(global.init);
|
|
break;
|
|
case kWasmF32:
|
|
section.emit_u8(kExprF32Const);
|
|
f32_view[0] = global.init;
|
|
section.emit_bytes(f32_bytes_view);
|
|
break;
|
|
case kWasmF64:
|
|
section.emit_u8(kExprF64Const);
|
|
f64_view[0] = global.init;
|
|
section.emit_bytes(f64_bytes_view);
|
|
break;
|
|
case kWasmAnyFunc:
|
|
case kWasmAnyRef:
|
|
if (global.function_index !== undefined) {
|
|
section.emit_u8(kExprRefFunc);
|
|
section.emit_u32v(global.function_index);
|
|
} else {
|
|
section.emit_u8(kExprRefNull);
|
|
}
|
|
break;
|
|
case kWasmExnRef:
|
|
section.emit_u8(kExprRefNull);
|
|
break;
|
|
}
|
|
} else {
|
|
// Emit a global-index initializer.
|
|
section.emit_u8(kExprGetGlobal);
|
|
section.emit_u32v(global.init_index);
|
|
}
|
|
section.emit_u8(kExprEnd); // end of init expression
|
|
}
|
|
});
|
|
}
|
|
|
|
// Add exceptions.
|
|
if (wasm.exceptions.length > 0) {
|
|
if (debug) print("emitting exceptions @ " + binary.length);
|
|
binary.emit_section(kExceptionSectionCode, section => {
|
|
section.emit_u32v(wasm.exceptions.length);
|
|
for (let type of wasm.exceptions) {
|
|
section.emit_u32v(kExceptionAttribute);
|
|
section.emit_u32v(type);
|
|
}
|
|
});
|
|
}
|
|
|
|
// Add export table.
|
|
var mem_export = (wasm.memory !== undefined && wasm.memory.exp);
|
|
var exports_count = wasm.exports.length + (mem_export ? 1 : 0);
|
|
if (exports_count > 0) {
|
|
if (debug) print("emitting exports @ " + binary.length);
|
|
binary.emit_section(kExportSectionCode, section => {
|
|
section.emit_u32v(exports_count);
|
|
for (let exp of wasm.exports) {
|
|
section.emit_string(exp.name);
|
|
section.emit_u8(exp.kind);
|
|
section.emit_u32v(exp.index);
|
|
}
|
|
if (mem_export) {
|
|
section.emit_string("memory");
|
|
section.emit_u8(kExternalMemory);
|
|
section.emit_u8(0);
|
|
}
|
|
});
|
|
}
|
|
|
|
// Add start function section.
|
|
if (wasm.start_index !== undefined) {
|
|
if (debug) print("emitting start function @ " + binary.length);
|
|
binary.emit_section(kStartSectionCode, section => {
|
|
section.emit_u32v(wasm.start_index);
|
|
});
|
|
}
|
|
|
|
// Add element segments
|
|
if (wasm.element_segments.length > 0) {
|
|
if (debug) print("emitting element segments @ " + binary.length);
|
|
binary.emit_section(kElementSectionCode, section => {
|
|
var inits = wasm.element_segments;
|
|
section.emit_u32v(inits.length);
|
|
|
|
for (let init of inits) {
|
|
if (init.is_active) {
|
|
// Active segment.
|
|
if (init.table == 0) {
|
|
section.emit_u32v(kActiveNoIndex);
|
|
} else {
|
|
section.emit_u32v(kActiveWithIndex);
|
|
section.emit_u32v(init.table);
|
|
}
|
|
if (init.is_global) {
|
|
section.emit_u8(kExprGetGlobal);
|
|
} else {
|
|
section.emit_u8(kExprI32Const);
|
|
}
|
|
section.emit_u32v(init.base);
|
|
section.emit_u8(kExprEnd);
|
|
section.emit_u32v(init.array.length);
|
|
for (let index of init.array) {
|
|
section.emit_u32v(index);
|
|
}
|
|
} else {
|
|
// Passive segment.
|
|
section.emit_u8(kPassive); // flags
|
|
section.emit_u8(kWasmAnyFunc);
|
|
section.emit_u32v(init.array.length);
|
|
for (let index of init.array) {
|
|
if (index === null) {
|
|
section.emit_u8(kExprRefNull);
|
|
section.emit_u8(kExprEnd);
|
|
} else {
|
|
section.emit_u8(kExprRefFunc);
|
|
section.emit_u32v(index);
|
|
section.emit_u8(kExprEnd);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
// If there are any passive data segments, add the DataCount section.
|
|
if (wasm.data_segments.some(seg => !seg.is_active)) {
|
|
binary.emit_section(kDataCountSectionCode, section => {
|
|
section.emit_u32v(wasm.data_segments.length);
|
|
});
|
|
}
|
|
|
|
// If there are compilation hints add a custom section 'compilationHints'
|
|
// after the function section and before the code section.
|
|
if (wasm.compilation_hints.length > 0) {
|
|
if (debug) print("emitting compilation hints @ " + binary.length);
|
|
// Build custom section payload.
|
|
let payloadBinary = new Binary();
|
|
let implicit_compilation_hints_count = wasm.functions.length;
|
|
payloadBinary.emit_u32v(implicit_compilation_hints_count);
|
|
|
|
// Defaults to the compiler's choice if no better hint was given (0x00).
|
|
let defaultHintByte = kCompilationHintStrategyDefault |
|
|
(kCompilationHintTierDefault << 2) |
|
|
(kCompilationHintTierDefault << 4);
|
|
|
|
// Emit hint byte for every function defined in this module.
|
|
for (let i = 0; i < implicit_compilation_hints_count; i++) {
|
|
let index = wasm.num_imported_funcs + i;
|
|
var hintByte;
|
|
if(index in wasm.compilation_hints) {
|
|
let hint = wasm.compilation_hints[index];
|
|
hintByte = hint.strategy | (hint.baselineTier << 2) |
|
|
(hint.topTier << 4);
|
|
} else{
|
|
hintByte = defaultHintByte;
|
|
}
|
|
payloadBinary.emit_u8(hintByte);
|
|
}
|
|
|
|
// Finalize as custom section.
|
|
let name = "compilationHints";
|
|
let bytes = this.createCustomSection(name, payloadBinary.trunc_buffer());
|
|
binary.emit_bytes(bytes);
|
|
}
|
|
|
|
// Add function bodies.
|
|
if (wasm.functions.length > 0) {
|
|
// emit function bodies
|
|
if (debug) print("emitting code @ " + binary.length);
|
|
binary.emit_section(kCodeSectionCode, section => {
|
|
section.emit_u32v(wasm.functions.length);
|
|
let header = new Binary;
|
|
for (let func of wasm.functions) {
|
|
header.reset();
|
|
// Function body length will be patched later.
|
|
let local_decls = [];
|
|
for (let l of func.locals || []) {
|
|
if (l.i32_count > 0) {
|
|
local_decls.push({count: l.i32_count, type: kWasmI32});
|
|
}
|
|
if (l.i64_count > 0) {
|
|
local_decls.push({count: l.i64_count, type: kWasmI64});
|
|
}
|
|
if (l.f32_count > 0) {
|
|
local_decls.push({count: l.f32_count, type: kWasmF32});
|
|
}
|
|
if (l.f64_count > 0) {
|
|
local_decls.push({count: l.f64_count, type: kWasmF64});
|
|
}
|
|
if (l.s128_count > 0) {
|
|
local_decls.push({count: l.s128_count, type: kWasmS128});
|
|
}
|
|
if (l.anyref_count > 0) {
|
|
local_decls.push({count: l.anyref_count, type: kWasmAnyRef});
|
|
}
|
|
if (l.anyfunc_count > 0) {
|
|
local_decls.push({count: l.anyfunc_count, type: kWasmAnyFunc});
|
|
}
|
|
if (l.except_count > 0) {
|
|
local_decls.push({count: l.except_count, type: kWasmExnRef});
|
|
}
|
|
}
|
|
|
|
header.emit_u32v(local_decls.length);
|
|
for (let decl of local_decls) {
|
|
header.emit_u32v(decl.count);
|
|
header.emit_u8(decl.type);
|
|
}
|
|
|
|
section.emit_u32v(header.length + func.body.length);
|
|
section.emit_bytes(header.trunc_buffer());
|
|
section.emit_bytes(func.body);
|
|
}
|
|
});
|
|
}
|
|
|
|
// Add data segments.
|
|
if (wasm.data_segments.length > 0) {
|
|
if (debug) print("emitting data segments @ " + binary.length);
|
|
binary.emit_section(kDataSectionCode, section => {
|
|
section.emit_u32v(wasm.data_segments.length);
|
|
for (let seg of wasm.data_segments) {
|
|
if (seg.is_active) {
|
|
section.emit_u8(0); // linear memory index 0 / flags
|
|
if (seg.is_global) {
|
|
// initializer is a global variable
|
|
section.emit_u8(kExprGetGlobal);
|
|
section.emit_u32v(seg.addr);
|
|
} else {
|
|
// initializer is a constant
|
|
section.emit_u8(kExprI32Const);
|
|
section.emit_u32v(seg.addr);
|
|
}
|
|
section.emit_u8(kExprEnd);
|
|
} else {
|
|
section.emit_u8(kPassive); // flags
|
|
}
|
|
section.emit_u32v(seg.data.length);
|
|
section.emit_bytes(seg.data);
|
|
}
|
|
});
|
|
}
|
|
|
|
// Add any explicitly added sections
|
|
for (let exp of wasm.explicit) {
|
|
if (debug) print("emitting explicit @ " + binary.length);
|
|
binary.emit_bytes(exp);
|
|
}
|
|
|
|
// Add names.
|
|
let num_function_names = 0;
|
|
let num_functions_with_local_names = 0;
|
|
for (let func of wasm.functions) {
|
|
if (func.name !== undefined) ++num_function_names;
|
|
if (func.numLocalNames() > 0) ++num_functions_with_local_names;
|
|
}
|
|
if (num_function_names > 0 || num_functions_with_local_names > 0 ||
|
|
wasm.name !== undefined) {
|
|
if (debug) print('emitting names @ ' + binary.length);
|
|
binary.emit_section(kUnknownSectionCode, section => {
|
|
section.emit_string('name');
|
|
// Emit module name.
|
|
if (wasm.name !== undefined) {
|
|
section.emit_section(kModuleNameCode, name_section => {
|
|
name_section.emit_string(wasm.name);
|
|
});
|
|
}
|
|
// Emit function names.
|
|
if (num_function_names > 0) {
|
|
section.emit_section(kFunctionNamesCode, name_section => {
|
|
name_section.emit_u32v(num_function_names);
|
|
for (let func of wasm.functions) {
|
|
if (func.name === undefined) continue;
|
|
name_section.emit_u32v(func.index);
|
|
name_section.emit_string(func.name);
|
|
}
|
|
});
|
|
}
|
|
// Emit local names.
|
|
if (num_functions_with_local_names > 0) {
|
|
section.emit_section(kLocalNamesCode, name_section => {
|
|
name_section.emit_u32v(num_functions_with_local_names);
|
|
for (let func of wasm.functions) {
|
|
if (func.numLocalNames() == 0) continue;
|
|
name_section.emit_u32v(func.index);
|
|
name_section.emit_u32v(func.numLocalNames());
|
|
for (let i = 0; i < func.local_names.length; ++i) {
|
|
if (func.local_names[i] === undefined) continue;
|
|
name_section.emit_u32v(i);
|
|
name_section.emit_string(func.local_names[i]);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
});
|
|
}
|
|
|
|
return binary.trunc_buffer();
|
|
}
|
|
|
|
toArray(debug = false) {
|
|
return Array.from(this.toBuffer(debug));
|
|
}
|
|
|
|
instantiate(ffi) {
|
|
let module = this.toModule();
|
|
let instance = new WebAssembly.Instance(module, ffi);
|
|
return instance;
|
|
}
|
|
|
|
asyncInstantiate(ffi) {
|
|
return WebAssembly.instantiate(this.toBuffer(), ffi)
|
|
.then(({module, instance}) => instance);
|
|
}
|
|
|
|
toModule(debug = false) {
|
|
return new WebAssembly.Module(this.toBuffer(debug));
|
|
}
|
|
}
|
|
|
|
function wasmSignedLeb(val, max_len = 5) {
|
|
let res = [];
|
|
for (let i = 0; i < max_len; ++i) {
|
|
let v = val & 0x7f;
|
|
// If {v} sign-extended from 7 to 32 bits is equal to val, we are done.
|
|
if (((v << 25) >> 25) == val) {
|
|
res.push(v);
|
|
return res;
|
|
}
|
|
res.push(v | 0x80);
|
|
val = val >> 7;
|
|
}
|
|
throw new Error(
|
|
'Leb value <' + val + '> exceeds maximum length of ' + max_len);
|
|
}
|
|
|
|
function wasmI32Const(val) {
|
|
return [kExprI32Const, ...wasmSignedLeb(val, 5)];
|
|
}
|
|
|
|
function wasmF32Const(f) {
|
|
f32_view[0] = f;
|
|
return [
|
|
kExprF32Const, f32_bytes_view[0], f32_bytes_view[1], f32_bytes_view[2],
|
|
f32_bytes_view[3]
|
|
];
|
|
}
|
|
|
|
function wasmF64Const(f) {
|
|
f64_view[0] = f;
|
|
return [
|
|
kExprF64Const, f64_bytes_view[0], f64_bytes_view[1], f64_bytes_view[2],
|
|
f64_bytes_view[3], f64_bytes_view[4], f64_bytes_view[5], f64_bytes_view[6],
|
|
f64_bytes_view[7]
|
|
];
|
|
}
|