404ce209ab
The behaviour was clarified in the spec: https://github.com/WebAssembly/exception-handling/pull/97 br_on_exn (which was done in another CL) and also rethrow should trap on nullptr. This CL implements this by an explicit check in the builtin called for rethrow. R=jkummerow@chromium.org CC=aheejin@chromium.org Bug: v8:10128 Change-Id: Icb0f4e54991b3385917bf183efa825048db4cb82 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2115430 Commit-Queue: Clemens Backes <clemensb@chromium.org> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org> Cr-Commit-Position: refs/heads/master@{#66827}
1479 lines
45 KiB
JavaScript
1479 lines
45 KiB
JavaScript
// Copyright 2016 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Used for encoding f32 and double constants to bits.
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let byte_view = new Uint8Array(8);
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let data_view = new DataView(byte_view.buffer);
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// The bytes function receives one of
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// - several arguments, each of which is either a number or a string of length
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// 1; if it's a string, the charcode of the contained character is used.
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// - a single array argument containing the actual arguments
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// - a single string; the returned buffer will contain the char codes of all
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// contained characters.
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function bytes(...input) {
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if (input.length == 1 && typeof input[0] == 'array') input = input[0];
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if (input.length == 1 && typeof input[0] == 'string') {
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let len = input[0].length;
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let view = new Uint8Array(len);
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for (let i = 0; i < len; i++) view[i] = input[0].charCodeAt(i);
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return view.buffer;
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}
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let view = new Uint8Array(input.length);
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for (let i = 0; i < input.length; i++) {
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let val = input[i];
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if (typeof val == 'string') {
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assertEquals(1, val.length, 'string inputs must have length 1');
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val = val.charCodeAt(0);
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}
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view[i] = val | 0;
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}
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return view.buffer;
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}
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// Header declaration constants
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var kWasmH0 = 0;
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var kWasmH1 = 0x61;
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var kWasmH2 = 0x73;
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var kWasmH3 = 0x6d;
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var kWasmV0 = 0x1;
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var kWasmV1 = 0;
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var kWasmV2 = 0;
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var kWasmV3 = 0;
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var kHeaderSize = 8;
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var kPageSize = 65536;
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var kSpecMaxPages = 65536;
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var kMaxVarInt32Size = 5;
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var kMaxVarInt64Size = 10;
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let kDeclNoLocals = 0;
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// Section declaration constants
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let kUnknownSectionCode = 0;
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let kTypeSectionCode = 1; // Function signature declarations
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let kImportSectionCode = 2; // Import declarations
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let kFunctionSectionCode = 3; // Function declarations
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let kTableSectionCode = 4; // Indirect function table and other tables
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let kMemorySectionCode = 5; // Memory attributes
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let kGlobalSectionCode = 6; // Global declarations
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let kExportSectionCode = 7; // Exports
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let kStartSectionCode = 8; // Start function declaration
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let kElementSectionCode = 9; // Elements section
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let kCodeSectionCode = 10; // Function code
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let kDataSectionCode = 11; // Data segments
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let kDataCountSectionCode = 12; // Data segment count (between Element & Code)
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let kExceptionSectionCode = 13; // Exception section (between Global & Export)
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// Name section types
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let kModuleNameCode = 0;
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let kFunctionNamesCode = 1;
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let kLocalNamesCode = 2;
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let kWasmFunctionTypeForm = 0x60;
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let kWasmAnyFunctionTypeForm = 0x70;
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let kHasMaximumFlag = 1;
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let kSharedHasMaximumFlag = 3;
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// Segment flags
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let kActiveNoIndex = 0;
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let kPassive = 1;
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let kActiveWithIndex = 2;
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let kDeclarative = 3;
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let kPassiveWithElements = 5;
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let kDeclarativeWithElements = 7;
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// Function declaration flags
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let kDeclFunctionName = 0x01;
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let kDeclFunctionImport = 0x02;
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let kDeclFunctionLocals = 0x04;
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let kDeclFunctionExport = 0x08;
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// Local types
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let kWasmStmt = 0x40;
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let kWasmI32 = 0x7f;
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let kWasmI64 = 0x7e;
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let kWasmF32 = 0x7d;
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let kWasmF64 = 0x7c;
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let kWasmS128 = 0x7b;
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let kWasmAnyRef = 0x6f;
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let kWasmAnyFunc = 0x70;
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let kWasmNullRef = 0x6e;
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let kWasmExnRef = 0x68;
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let kExternalFunction = 0;
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let kExternalTable = 1;
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let kExternalMemory = 2;
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let kExternalGlobal = 3;
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let kExternalException = 4;
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let kTableZero = 0;
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let kMemoryZero = 0;
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let kSegmentZero = 0;
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let kExceptionAttribute = 0;
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// Useful signatures
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let kSig_i_i = makeSig([kWasmI32], [kWasmI32]);
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let kSig_l_l = makeSig([kWasmI64], [kWasmI64]);
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let kSig_i_l = makeSig([kWasmI64], [kWasmI32]);
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let kSig_i_ii = makeSig([kWasmI32, kWasmI32], [kWasmI32]);
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let kSig_i_iii = makeSig([kWasmI32, kWasmI32, kWasmI32], [kWasmI32]);
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let kSig_v_iiii = makeSig([kWasmI32, kWasmI32, kWasmI32, kWasmI32], []);
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let kSig_f_ff = makeSig([kWasmF32, kWasmF32], [kWasmF32]);
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let kSig_d_dd = makeSig([kWasmF64, kWasmF64], [kWasmF64]);
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let kSig_l_ll = makeSig([kWasmI64, kWasmI64], [kWasmI64]);
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let kSig_i_dd = makeSig([kWasmF64, kWasmF64], [kWasmI32]);
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let kSig_v_v = makeSig([], []);
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let kSig_i_v = makeSig([], [kWasmI32]);
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let kSig_l_v = makeSig([], [kWasmI64]);
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let kSig_f_v = makeSig([], [kWasmF32]);
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let kSig_d_v = makeSig([], [kWasmF64]);
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let kSig_v_i = makeSig([kWasmI32], []);
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let kSig_v_ii = makeSig([kWasmI32, kWasmI32], []);
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let kSig_v_iii = makeSig([kWasmI32, kWasmI32, kWasmI32], []);
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let kSig_v_l = makeSig([kWasmI64], []);
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let kSig_v_d = makeSig([kWasmF64], []);
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let kSig_v_dd = makeSig([kWasmF64, kWasmF64], []);
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let kSig_v_ddi = makeSig([kWasmF64, kWasmF64, kWasmI32], []);
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let kSig_ii_v = makeSig([], [kWasmI32, kWasmI32]);
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let kSig_iii_v = makeSig([], [kWasmI32, kWasmI32, kWasmI32]);
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let kSig_ii_i = makeSig([kWasmI32], [kWasmI32, kWasmI32]);
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let kSig_iii_i = makeSig([kWasmI32], [kWasmI32, kWasmI32, kWasmI32]);
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let kSig_ii_ii = makeSig([kWasmI32, kWasmI32], [kWasmI32, kWasmI32]);
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let kSig_iii_ii = makeSig([kWasmI32, kWasmI32], [kWasmI32, kWasmI32, kWasmI32]);
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let kSig_v_f = makeSig([kWasmF32], []);
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let kSig_f_f = makeSig([kWasmF32], [kWasmF32]);
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let kSig_f_d = makeSig([kWasmF64], [kWasmF32]);
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let kSig_d_d = makeSig([kWasmF64], [kWasmF64]);
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let kSig_r_r = makeSig([kWasmAnyRef], [kWasmAnyRef]);
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let kSig_a_a = makeSig([kWasmAnyFunc], [kWasmAnyFunc]);
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let kSig_e_e = makeSig([kWasmExnRef], [kWasmExnRef]);
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let kSig_i_r = makeSig([kWasmAnyRef], [kWasmI32]);
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let kSig_v_r = makeSig([kWasmAnyRef], []);
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let kSig_v_a = makeSig([kWasmAnyFunc], []);
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let kSig_v_e = makeSig([kWasmExnRef], []);
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let kSig_v_rr = makeSig([kWasmAnyRef, kWasmAnyRef], []);
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let kSig_v_aa = makeSig([kWasmAnyFunc, kWasmAnyFunc], []);
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let kSig_r_v = makeSig([], [kWasmAnyRef]);
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let kSig_a_v = makeSig([], [kWasmAnyFunc]);
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let kSig_a_i = makeSig([kWasmI32], [kWasmAnyFunc]);
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let kSig_e_v = makeSig([], [kWasmExnRef]);
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function makeSig(params, results) {
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return {params: params, results: results};
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}
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function makeSig_v_x(x) {
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return makeSig([x], []);
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}
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function makeSig_v_xx(x) {
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return makeSig([x, x], []);
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}
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function makeSig_r_v(r) {
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return makeSig([], [r]);
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}
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function makeSig_r_x(r, x) {
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return makeSig([x], [r]);
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}
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function makeSig_r_xx(r, x) {
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return makeSig([x, x], [r]);
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}
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// Opcodes
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let kExprUnreachable = 0x00;
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let kExprNop = 0x01;
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let kExprBlock = 0x02;
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let kExprLoop = 0x03;
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let kExprIf = 0x04;
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let kExprElse = 0x05;
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let kExprTry = 0x06;
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let kExprCatch = 0x07;
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let kExprThrow = 0x08;
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let kExprRethrow = 0x09;
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let kExprBrOnExn = 0x0a;
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let kExprEnd = 0x0b;
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let kExprBr = 0x0c;
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let kExprBrIf = 0x0d;
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let kExprBrTable = 0x0e;
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let kExprReturn = 0x0f;
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let kExprCallFunction = 0x10;
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let kExprCallIndirect = 0x11;
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let kExprReturnCall = 0x12;
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let kExprReturnCallIndirect = 0x13;
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let kExprDrop = 0x1a;
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let kExprSelect = 0x1b;
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let kExprSelectWithType = 0x1c;
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let kExprLocalGet = 0x20;
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let kExprLocalSet = 0x21;
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let kExprLocalTee = 0x22;
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let kExprGlobalGet = 0x23;
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let kExprGlobalSet = 0x24;
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let kExprTableGet = 0x25;
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let kExprTableSet = 0x26;
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let kExprI32LoadMem = 0x28;
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let kExprI64LoadMem = 0x29;
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let kExprF32LoadMem = 0x2a;
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let kExprF64LoadMem = 0x2b;
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let kExprI32LoadMem8S = 0x2c;
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let kExprI32LoadMem8U = 0x2d;
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let kExprI32LoadMem16S = 0x2e;
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let kExprI32LoadMem16U = 0x2f;
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let kExprI64LoadMem8S = 0x30;
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let kExprI64LoadMem8U = 0x31;
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let kExprI64LoadMem16S = 0x32;
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let kExprI64LoadMem16U = 0x33;
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let kExprI64LoadMem32S = 0x34;
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let kExprI64LoadMem32U = 0x35;
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let kExprI32StoreMem = 0x36;
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let kExprI64StoreMem = 0x37;
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let kExprF32StoreMem = 0x38;
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let kExprF64StoreMem = 0x39;
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let kExprI32StoreMem8 = 0x3a;
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let kExprI32StoreMem16 = 0x3b;
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let kExprI64StoreMem8 = 0x3c;
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let kExprI64StoreMem16 = 0x3d;
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let kExprI64StoreMem32 = 0x3e;
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let kExprMemorySize = 0x3f;
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let kExprMemoryGrow = 0x40;
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let kExprI32Const = 0x41;
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let kExprI64Const = 0x42;
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let kExprF32Const = 0x43;
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let kExprF64Const = 0x44;
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let kExprI32Eqz = 0x45;
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let kExprI32Eq = 0x46;
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let kExprI32Ne = 0x47;
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let kExprI32LtS = 0x48;
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let kExprI32LtU = 0x49;
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let kExprI32GtS = 0x4a;
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let kExprI32GtU = 0x4b;
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let kExprI32LeS = 0x4c;
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let kExprI32LeU = 0x4d;
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let kExprI32GeS = 0x4e;
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let kExprI32GeU = 0x4f;
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let kExprI64Eqz = 0x50;
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let kExprI64Eq = 0x51;
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let kExprI64Ne = 0x52;
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let kExprI64LtS = 0x53;
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let kExprI64LtU = 0x54;
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let kExprI64GtS = 0x55;
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let kExprI64GtU = 0x56;
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let kExprI64LeS = 0x57;
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let kExprI64LeU = 0x58;
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let kExprI64GeS = 0x59;
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let kExprI64GeU = 0x5a;
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let kExprF32Eq = 0x5b;
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let kExprF32Ne = 0x5c;
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let kExprF32Lt = 0x5d;
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let kExprF32Gt = 0x5e;
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let kExprF32Le = 0x5f;
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let kExprF32Ge = 0x60;
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let kExprF64Eq = 0x61;
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let kExprF64Ne = 0x62;
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let kExprF64Lt = 0x63;
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let kExprF64Gt = 0x64;
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let kExprF64Le = 0x65;
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let kExprF64Ge = 0x66;
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let kExprI32Clz = 0x67;
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let kExprI32Ctz = 0x68;
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let kExprI32Popcnt = 0x69;
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let kExprI32Add = 0x6a;
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let kExprI32Sub = 0x6b;
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let kExprI32Mul = 0x6c;
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let kExprI32DivS = 0x6d;
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let kExprI32DivU = 0x6e;
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let kExprI32RemS = 0x6f;
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let kExprI32RemU = 0x70;
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let kExprI32And = 0x71;
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let kExprI32Ior = 0x72;
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let kExprI32Xor = 0x73;
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let kExprI32Shl = 0x74;
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let kExprI32ShrS = 0x75;
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let kExprI32ShrU = 0x76;
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let kExprI32Rol = 0x77;
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let kExprI32Ror = 0x78;
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let kExprI64Clz = 0x79;
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let kExprI64Ctz = 0x7a;
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let kExprI64Popcnt = 0x7b;
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let kExprI64Add = 0x7c;
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let kExprI64Sub = 0x7d;
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let kExprI64Mul = 0x7e;
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let kExprI64DivS = 0x7f;
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let kExprI64DivU = 0x80;
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let kExprI64RemS = 0x81;
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let kExprI64RemU = 0x82;
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let kExprI64And = 0x83;
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let kExprI64Ior = 0x84;
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let kExprI64Xor = 0x85;
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let kExprI64Shl = 0x86;
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let kExprI64ShrS = 0x87;
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let kExprI64ShrU = 0x88;
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let kExprI64Rol = 0x89;
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let kExprI64Ror = 0x8a;
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let kExprF32Abs = 0x8b;
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let kExprF32Neg = 0x8c;
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let kExprF32Ceil = 0x8d;
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let kExprF32Floor = 0x8e;
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let kExprF32Trunc = 0x8f;
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let kExprF32NearestInt = 0x90;
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let kExprF32Sqrt = 0x91;
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let kExprF32Add = 0x92;
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let kExprF32Sub = 0x93;
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let kExprF32Mul = 0x94;
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let kExprF32Div = 0x95;
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let kExprF32Min = 0x96;
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let kExprF32Max = 0x97;
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let kExprF32CopySign = 0x98;
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let kExprF64Abs = 0x99;
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let kExprF64Neg = 0x9a;
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let kExprF64Ceil = 0x9b;
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let kExprF64Floor = 0x9c;
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let kExprF64Trunc = 0x9d;
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let kExprF64NearestInt = 0x9e;
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let kExprF64Sqrt = 0x9f;
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let kExprF64Add = 0xa0;
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let kExprF64Sub = 0xa1;
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let kExprF64Mul = 0xa2;
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let kExprF64Div = 0xa3;
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let kExprF64Min = 0xa4;
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let kExprF64Max = 0xa5;
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let kExprF64CopySign = 0xa6;
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let kExprI32ConvertI64 = 0xa7;
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let kExprI32SConvertF32 = 0xa8;
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let kExprI32UConvertF32 = 0xa9;
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let kExprI32SConvertF64 = 0xaa;
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let kExprI32UConvertF64 = 0xab;
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let kExprI64SConvertI32 = 0xac;
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let kExprI64UConvertI32 = 0xad;
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let kExprI64SConvertF32 = 0xae;
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let kExprI64UConvertF32 = 0xaf;
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let kExprI64SConvertF64 = 0xb0;
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let kExprI64UConvertF64 = 0xb1;
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let kExprF32SConvertI32 = 0xb2;
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let kExprF32UConvertI32 = 0xb3;
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let kExprF32SConvertI64 = 0xb4;
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let kExprF32UConvertI64 = 0xb5;
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let kExprF32ConvertF64 = 0xb6;
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let kExprF64SConvertI32 = 0xb7;
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let kExprF64UConvertI32 = 0xb8;
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let kExprF64SConvertI64 = 0xb9;
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let kExprF64UConvertI64 = 0xba;
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let kExprF64ConvertF32 = 0xbb;
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let kExprI32ReinterpretF32 = 0xbc;
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let kExprI64ReinterpretF64 = 0xbd;
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let kExprF32ReinterpretI32 = 0xbe;
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let kExprF64ReinterpretI64 = 0xbf;
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let kExprI32SExtendI8 = 0xc0;
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let kExprI32SExtendI16 = 0xc1;
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let kExprI64SExtendI8 = 0xc2;
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let kExprI64SExtendI16 = 0xc3;
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let kExprI64SExtendI32 = 0xc4;
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let kExprRefNull = 0xd0;
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let kExprRefIsNull = 0xd1;
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let kExprRefFunc = 0xd2;
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// Prefix opcodes
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let kNumericPrefix = 0xfc;
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let kSimdPrefix = 0xfd;
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let kAtomicPrefix = 0xfe;
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// Numeric opcodes.
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let kExprMemoryInit = 0x08;
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let kExprDataDrop = 0x09;
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let kExprMemoryCopy = 0x0a;
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let kExprMemoryFill = 0x0b;
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let kExprTableInit = 0x0c;
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let kExprElemDrop = 0x0d;
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let kExprTableCopy = 0x0e;
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let kExprTableGrow = 0x0f;
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let kExprTableSize = 0x10;
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let kExprTableFill = 0x11;
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// Atomic opcodes.
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let kExprAtomicNotify = 0x00;
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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 kExprS128LoadMem = 0x00;
|
|
let kExprS128StoreMem = 0x01;
|
|
let kExprI32x4Splat = 0x0c;
|
|
let kExprF32x4Splat = 0x12;
|
|
let kExprI32x4Eq = 0x2c;
|
|
let kExprS1x8AnyTrue = 0x63;
|
|
let kExprS1x4AllTrue = 0x75;
|
|
let kExprI32x4Add = 0x79;
|
|
let kExprF32x4Min = 0x9e;
|
|
let kExprS8x16LoadSplat = 0xc2;
|
|
|
|
// 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 kTrapBrOnExnNullRef = 13;
|
|
let kTrapRethrowNullRef = 14;
|
|
|
|
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",
|
|
"br_on_exn on nullref value",
|
|
"rethrowing nullref value"
|
|
];
|
|
|
|
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 = [];
|
|
this.body_offset = undefined; // Not valid until module is serialized.
|
|
}
|
|
|
|
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 && type != kWasmNullRef && type != kWasmExnRef) {
|
|
throw new Error(
|
|
'Tables must be of type kWasmAnyRef, kWasmAnyFunc, kWasmNullRef or kWasmExnRef');
|
|
}
|
|
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,
|
|
is_declarative: false
|
|
});
|
|
return this;
|
|
}
|
|
|
|
addPassiveElementSegment(array, is_import = false) {
|
|
this.element_segments.push(
|
|
{array: array, is_active: false, is_declarative: false});
|
|
return this;
|
|
}
|
|
|
|
addDeclarativeElementSegment(array, is_import = false) {
|
|
this.element_segments.push(
|
|
{array: array, is_active: false, is_declarative: true});
|
|
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);
|
|
data_view.setFloat32(0, global.init, true);
|
|
section.emit_bytes(byte_view.subarray(0, 4));
|
|
break;
|
|
case kWasmF64:
|
|
section.emit_u8(kExprF64Const);
|
|
data_view.setFloat64(0, global.init, true);
|
|
section.emit_bytes(byte_view);
|
|
break;
|
|
case kWasmAnyFunc:
|
|
case kWasmAnyRef:
|
|
case kWasmNullRef:
|
|
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(kExprGlobalGet);
|
|
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(kExprGlobalGet);
|
|
} else {
|
|
section.emit_u8(kExprI32Const);
|
|
}
|
|
section.emit_u32v(init.base);
|
|
section.emit_u8(kExprEnd);
|
|
if (init.table != 0) {
|
|
section.emit_u8(kExternalFunction);
|
|
}
|
|
section.emit_u32v(init.array.length);
|
|
for (let index of init.array) {
|
|
section.emit_u32v(index);
|
|
}
|
|
} else if (
|
|
init.is_declarative &&
|
|
init.array.every(index => index !== null)) {
|
|
section.emit_u8(kDeclarative);
|
|
section.emit_u8(kExternalFunction);
|
|
section.emit_u32v(init.array.length);
|
|
for (let index of init.array) {
|
|
section.emit_u32v(index);
|
|
}
|
|
} else {
|
|
// Passive or declarative segment with elements.
|
|
section.emit_u8(
|
|
init.is_declarative ? kDeclarativeWithElements :
|
|
kPassiveWithElements); // 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);
|
|
let section_length = 0;
|
|
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.nullref_count > 0) {
|
|
local_decls.push({count: l.nullref_count, type: kWasmNullRef});
|
|
}
|
|
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());
|
|
// Set to section offset for now, will update.
|
|
func.body_offset = section.length;
|
|
section.emit_bytes(func.body);
|
|
}
|
|
section_length = section.length;
|
|
});
|
|
for (let func of wasm.functions) {
|
|
func.body_offset += binary.length - section_length;
|
|
}
|
|
}
|
|
|
|
// 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(kExprGlobalGet);
|
|
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) {
|
|
// Write in little-endian order at offset 0.
|
|
data_view.setFloat32(0, f, true);
|
|
return [
|
|
kExprF32Const, byte_view[0], byte_view[1], byte_view[2], byte_view[3]
|
|
];
|
|
}
|
|
|
|
function wasmF64Const(f) {
|
|
// Write in little-endian order at offset 0.
|
|
data_view.setFloat64(0, f, true);
|
|
return [
|
|
kExprF64Const, byte_view[0], byte_view[1], byte_view[2],
|
|
byte_view[3], byte_view[4], byte_view[5], byte_view[6], byte_view[7]
|
|
];
|
|
}
|