binary.js - mozsearch

load(libdir + "wasm-binary.js");

const { extractStackFrameFunction } = WasmHelpers;

const { Module, RuntimeError, CompileError } = WebAssembly;

const magicError = /failed to match magic number/;

const unknownSection = /expected custom section/;

function sectionError(section) {

    return RegExp(`failed to start ${section} section`);

function versionError(actual) {

    var expect = encodingVersion;

    var str = `binary version 0x${actual.toString(16)} does not match expected version 0x${expect.toString(16)}`;

    return RegExp(str);

const U32MAX_LEB = [255, 255, 255, 255, 15];

const wasmEval = (code, imports) => new WebAssembly.Instance(new Module(code), imports).exports;

assertErrorMessage(() => wasmEval(toU8([])), CompileError, magicError);

assertErrorMessage(() => wasmEval(toU8([42])), CompileError, magicError);

assertErrorMessage(() => wasmEval(toU8([magic0, magic1, magic2])), CompileError, magicError);

assertErrorMessage(() => wasmEval(toU8([1,2,3,4])), CompileError, magicError);

assertErrorMessage(() => wasmEval(toU8([magic0, magic1, magic2, magic3])), CompileError, versionError(0x6d736100));

assertErrorMessage(() => wasmEval(toU8([magic0, magic1, magic2, magic3, 1])), CompileError, versionError(0x6d736100));

assertErrorMessage(() => wasmEval(toU8([magic0, magic1, magic2, magic3, ver0])), CompileError, versionError(0x6d736100));

assertErrorMessage(() => wasmEval(toU8([magic0, magic1, magic2, magic3, ver0, ver1, ver2])), CompileError, versionError(0x6d736100));

var o = wasmEval(toU8(moduleHeaderThen()));

assertEq(Object.getOwnPropertyNames(o).length, 0);

// unfinished known sections

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(typeId))), CompileError, sectionError("type"));

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(importId))), CompileError, sectionError("import"));

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(functionId))), CompileError, sectionError("function"));

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(tableId))), CompileError, sectionError("table"));

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(memoryId))), CompileError, sectionError("memory"));

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(globalId))), CompileError, sectionError("global"));

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(exportId))), CompileError, sectionError("export"));

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(startId))), CompileError, sectionError("start"));

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(elemId))), CompileError, sectionError("elem"));

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(codeId))), CompileError, sectionError("code"));

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(dataId))), CompileError, sectionError("data"));

// unknown sections are unconditionally rejected

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(37))), CompileError, unknownSection);

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(37, 0))), CompileError, unknownSection);

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(37, 1, 0))), CompileError, unknownSection);

// user sections have special rules

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(0))), CompileError, sectionError("custom"));  // no length

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(0, 0))), CompileError, sectionError("custom"));  // no id

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(0, 0, 0))), CompileError, sectionError("custom"));  // payload too small to have id length

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(0, 1, 1))), CompileError, sectionError("custom"));  // id not present

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(0, 1, 1, 65))), CompileError, sectionError("custom"));  // id length doesn't fit in section

assertErrorMessage(() => wasmEval(toU8(moduleHeaderThen(0, 1, 0, 0))), CompileError, sectionError("custom"));  // second, unfinished custom section

wasmEval(toU8(moduleHeaderThen(0, 1, 0)));  // empty id

wasmEval(toU8(moduleHeaderThen(0, 1, 0,  0, 1, 0)));  // 2x empty id

wasmEval(toU8(moduleHeaderThen(0, 2, 1, 65)));  // id = "A"

const v2vSig = {args:[], ret:VoidCode};

const v2vSigSection = sigSection([v2vSig]);

const i2vSig = {args:[I32Code], ret:VoidCode};

const v2vBody = funcBody({locals:[], body:[]});

assertErrorMessage(() => wasmEval(moduleWithSections([ {name: typeId, body: U32MAX_LEB } ])), CompileError, /too many types/);

assertErrorMessage(() => wasmEval(moduleWithSections([ {name: typeId, body: [1, 0], } ])), CompileError, /expected type form/);

assertErrorMessage(() => wasmEval(moduleWithSections([ {name: typeId, body: [1, FuncCode, ...U32MAX_LEB], } ])), CompileError, /too many arguments in signature/);

assertThrowsInstanceOf(() => wasmEval(moduleWithSections([{name: typeId, body: [1]}])), CompileError);

assertThrowsInstanceOf(() => wasmEval(moduleWithSections([{name: typeId, body: [1, 1, 0]}])), CompileError);

wasmEval(moduleWithSections([sigSection([])]));

wasmEval(moduleWithSections([v2vSigSection]));

wasmEval(moduleWithSections([sigSection([i2vSig])]));

wasmEval(moduleWithSections([sigSection([v2vSig, i2vSig])]));

assertErrorMessage(() => wasmEval(moduleWithSections([sigSection([{args:[], ret:33}])])), CompileError, /bad type/);

assertErrorMessage(() => wasmEval(moduleWithSections([sigSection([{args:[33], ret:VoidCode}])])), CompileError, /bad type/);

assertThrowsInstanceOf(() => wasmEval(moduleWithSections([sigSection([]), declSection([0])])), CompileError, /signature index out of range/);

assertThrowsInstanceOf(() => wasmEval(moduleWithSections([v2vSigSection, declSection([1])])), CompileError, /signature index out of range/);

assertErrorMessage(() => wasmEval(moduleWithSections([v2vSigSection, declSection([0])])), CompileError, /expected code section/);

wasmEval(moduleWithSections([v2vSigSection, declSection([0]), bodySection([v2vBody])]));

assertErrorMessage(() => wasmEval(moduleWithSections([v2vSigSection, declSection([0]), bodySection([v2vBody.concat(v2vBody)])])), CompileError, /byte size mismatch in code section/);

assertThrowsInstanceOf(() => wasmEval(moduleWithSections([v2vSigSection, {name: importId, body:[]}])), CompileError);

assertErrorMessage(() => wasmEval(moduleWithSections([importSection([{sigIndex:0, module:"a", func:"b"}])])), CompileError, /signature index out of range/);

assertErrorMessage(() => wasmEval(moduleWithSections([v2vSigSection, importSection([{sigIndex:1, module:"a", func:"b"}])])), CompileError, /signature index out of range/);

wasmEval(moduleWithSections([v2vSigSection, importSection([])]));

wasmEval(moduleWithSections([v2vSigSection, importSection([{sigIndex:0, module:"a", func:""}])]), {a:{"":()=>{}}});

wasmEval(moduleWithSections([

    v2vSigSection,

    importSection([{sigIndex:0, module:"a", func:""}]),

    declSection([0]),

    bodySection([v2vBody])

]), {a:{"":()=>{}}});

assertErrorMessage(() => wasmEval(moduleWithSections([ dataSection([{offset:1, elems:[]}]) ])), CompileError, /data segment requires a memory section/);

wasmEval(moduleWithSections([tableSection(0)]));

wasmEval(moduleWithSections([elemSection([])]));

wasmEval(moduleWithSections([tableSection(0), elemSection([])]));

wasmEval(moduleWithSections([tableSection(1), elemSection([{offset:1, elems:[]}])]));

assertErrorMessage(() => wasmEval(moduleWithSections([tableSection(1), elemSection([{offset:0, elems:[0]}])])), CompileError, /element index out of range/);

wasmEval(moduleWithSections([v2vSigSection, declSection([0]), tableSection(1), elemSection([{offset:0, elems:[0]}]), bodySection([v2vBody])]));

wasmEval(moduleWithSections([v2vSigSection, declSection([0]), tableSection(2), elemSection([{offset:0, elems:[0,0]}]), bodySection([v2vBody])]));

assertErrorMessage(() => wasmEval(moduleWithSections([v2vSigSection, declSection([0]), tableSection(2), elemSection([{offset:0, elems:[0,1]}]), bodySection([v2vBody])])), CompileError, /element index out of range/);

wasmEval(moduleWithSections([v2vSigSection, declSection([0,0,0]), tableSection(4), elemSection([{offset:0, elems:[0,1,0,2]}]), bodySection([v2vBody, v2vBody, v2vBody])]));

wasmEval(moduleWithSections([sigSection([v2vSig,i2vSig]), declSection([0,0,1]), tableSection(3), elemSection([{offset:0,elems:[0,1,2]}]), bodySection([v2vBody, v2vBody, v2vBody])]));

wasmEval(moduleWithSections([tableSection0()]));

wasmEval(moduleWithSections([memorySection(0)]));

function memorySection2() {

    var body = [];

    body.push(...varU32(2));           // number of memories

    body.push(...varU32(0x0));

    body.push(...varU32(0));

    body.push(...varU32(0x0));

    body.push(...varU32(0));

    return { name: memoryId, body };

wasmEval(moduleWithSections([memorySection0()]));

if (wasmMultiMemoryEnabled()) {

    wasmEval(moduleWithSections([memorySection2()]));

} else {

    assertErrorMessage(() => wasmEval(moduleWithSections([memorySection2()])), CompileError, /number of memories must be at most one/);

// Test early 'end'

const bodyMismatch = /(function body length mismatch)|(operators remaining after end of function)/;

assertErrorMessage(() => wasmEval(moduleWithSections([v2vSigSection, declSection([0]), bodySection([funcBody({locals:[], body:[EndCode]})])])), CompileError, bodyMismatch);

assertErrorMessage(() => wasmEval(moduleWithSections([v2vSigSection, declSection([0]), bodySection([funcBody({locals:[], body:[UnreachableCode,EndCode]})])])), CompileError, bodyMismatch);

assertErrorMessage(() => wasmEval(moduleWithSections([v2vSigSection, declSection([0]), bodySection([funcBody({locals:[], body:[EndCode,UnreachableCode]})])])), CompileError, bodyMismatch);

// Ignore errors in name section.

var tooBigNameSection = {

    name: userDefinedId,

    body: [...string(nameName), ...varU32(Math.pow(2, 31))] // declare 2**31 functions.

};

wasmEval(moduleWithSections([tooBigNameSection]));

// Skip custom sections before any expected section

var customDefSec = customSection("wee", 42, 13);

var declSec = declSection([0]);

var bodySec = bodySection([v2vBody]);

var nameSec = nameSection([funcNameSubsection([{name:'hi'}])]);

wasmEval(moduleWithSections([customDefSec, v2vSigSection, declSec, bodySec]));

wasmEval(moduleWithSections([v2vSigSection, customDefSec, declSec, bodySec]));

wasmEval(moduleWithSections([v2vSigSection, declSec, customDefSec, bodySec]));

wasmEval(moduleWithSections([v2vSigSection, declSec, bodySec, customDefSec]));

wasmEval(moduleWithSections([customDefSec, customDefSec, v2vSigSection, declSec, bodySec]));

wasmEval(moduleWithSections([customDefSec, customDefSec, v2vSigSection, customDefSec, declSec, customDefSec, bodySec]));

// custom sections reflection:

function checkCustomSection(buf, val) {

    assertEq(buf instanceof ArrayBuffer, true);

    assertEq(buf.byteLength, 1);

    assertEq(new Uint8Array(buf)[0], val);

var custom1 = customSection("one", 1);

var custom2 = customSection("one", 2);

var custom3 = customSection("two", 3);

var custom4 = customSection("three", 4);

var custom5 = customSection("three", 5);

var custom6 = customSection("three", 6);

var m = new Module(moduleWithSections([custom1, v2vSigSection, custom2, declSec, custom3, bodySec, custom4, nameSec, custom5, custom6]));

var arr = Module.customSections(m, "one");

assertEq(arr.length, 2);

checkCustomSection(arr[0], 1);

checkCustomSection(arr[1], 2);

var arr = Module.customSections(m, "two");

assertEq(arr.length, 1);

checkCustomSection(arr[0], 3);

var arr = Module.customSections(m, "three");

assertEq(arr.length, 3);

checkCustomSection(arr[0], 4);

checkCustomSection(arr[1], 5);

checkCustomSection(arr[2], 6);

var arr = Module.customSections(m, "name");

assertEq(arr.length, 1);

assertEq(arr[0].byteLength, nameSec.body.length - 5 /* 4name */);

// Test name/custom section warnings:

const nameWarning = /validated with warning.*'name' custom section/;

const okNameSec = nameSection([]);

assertNoWarning(() => wasmEval(moduleWithSections([v2vSigSection, declSec, bodySec, okNameSec])));

const badNameSec1 = nameSection([]);

badNameSec1.body.push(1);

assertWarning(() => wasmEval(moduleWithSections([v2vSigSection, declSec, bodySec, badNameSec1])), nameWarning);

const badNameSec2 = nameSection([funcNameSubsection([{name:'blah'}])]);

badNameSec2.body.push(100, 20, 42, 83);

assertWarning(() => wasmEval(moduleWithSections([v2vSigSection, declSec, bodySec, badNameSec2])), nameWarning);

const badNameSec3 = nameSection([funcNameSubsection([{name:'blah'}])]);

badNameSec3.body.pop();

assertWarning(() => wasmEval(moduleWithSections([v2vSigSection, declSec, bodySec, badNameSec3])), nameWarning);

assertNoWarning(() => wasmEval(moduleWithSections([nameSection([moduleNameSubsection('hi')])])));

assertWarning(() => wasmEval(moduleWithSections([nameSection([moduleNameSubsection('hi'), moduleNameSubsection('boo')])])), nameWarning);

// Unknown name subsection

assertNoWarning(() => wasmEval(moduleWithSections([nameSection([moduleNameSubsection('hi'), [4, 0]])])));

assertWarning(() => wasmEval(moduleWithSections([nameSection([moduleNameSubsection('hi'), [4, 1]])])), nameWarning);

assertNoWarning(() => wasmEval(moduleWithSections([nameSection([moduleNameSubsection('hi'), [4, 1, 42]])])));

// Provide a module name but no function names.

assertErrorMessage(() => wasmEval(moduleWithSections([

    v2vSigSection,

    declSection([0]),

    exportSection([{funcIndex: 0, name: "f"}]),

    bodySection([funcBody({locals:[], body:[UnreachableCode]})]),

    nameSection([moduleNameSubsection('hi')])])

).f(), RuntimeError, /unreachable/);

// Diagnose invalid block signature types.

for (var bad of [0xff, 1, 0x3f])

    assertErrorMessage(() => wasmEval(moduleWithSections([sigSection([v2vSig]), declSection([0]), bodySection([funcBody({locals:[], body:[BlockCode, bad, EndCode]})])])), CompileError, /(invalid .*block type)|(unknown type)/);

const multiValueModule = moduleWithSections([sigSection([v2vSig]), declSection([0]), bodySection([funcBody({locals:[], body:[BlockCode, 0, EndCode]})])]);

// In this test module, 0 denotes a void-to-void block type.

assertEq(WebAssembly.validate(multiValueModule), true);

// Ensure all invalid opcodes are rejected.  Note that the game here (and for

// the prefixed cases below) is to present only opcodes which will be rejected by

// *both* Baseline and Ion.

for (let op of undefinedOpcodes) {

    let binary = moduleWithSections([v2vSigSection, declSection([0]), bodySection([funcBody({locals:[], body:[op]})])]);

    assertErrorMessage(() => wasmEval(binary), CompileError, /((unrecognized|Unknown) opcode)|(tail calls support is not enabled)|(Exceptions support is not enabled)|(Unexpected EOF)/);

    assertEq(WebAssembly.validate(binary), false);

// Prefixed opcodes

function checkIllegalPrefixed(prefix, opcode) {

    let binary = moduleWithSections([v2vSigSection,

                                     declSection([0]),

                                     bodySection([funcBody({locals:[],

                                                            body:[prefix, ...varU32(opcode)]})])]);

    assertErrorMessage(() => wasmEval(binary), CompileError, /((unrecognized|Unknown) opcode)|(Unknown.*subopcode)|(Unexpected EOF)|(SIMD support is not enabled)|(invalid lane index)/);

    assertEq(WebAssembly.validate(binary), false);

// Illegal GcPrefix opcodes

let reservedGc = {

    // Structure operations

    0x00: true, 0x01: true, 0x02: true, 0x03: true, 0x04: true, 0x05: true,

    // Array operations

    0x06: true, 0x07: true, 0x08: true, 0x09: true, 0x0a: true, 0x0b: true,

    0x0c: true, 0x0d: true, 0x0e: true, 0x0f: true, 0x10: true, 0x11: true,

    0x12: true, 0x13: true,

    // Ref operations

    0x14: true, 0x15: true, 0x16: true, 0x17: true, 0x18: true, 0x19: true,

    0x1a: true, 0x1b: true,

    // i31 operations

    0x1c: true, 0x1d: true, 0x1e: true,

};

for (let i = 0; i < 256; i++) {

    if (reservedGc.hasOwnProperty(i)) {

        continue;

    checkIllegalPrefixed(GcPrefix, i);

// Illegal ThreadPrefix opcodes

//

// June 2017 threads draft:

//

//  0x00 .. 0x03 are wait/wake/fence ops

//  0x10 .. 0x4f are primitive atomic ops

for (let i = 0x4; i < 0x10; i++)

    checkIllegalPrefixed(ThreadPrefix, i);

for (let i = 0x4f; i < 0x100; i++)

    checkIllegalPrefixed(ThreadPrefix, i);

// Illegal Misc opcodes

var reservedMisc =

    { // Saturating conversions (standardized)

      0x00: true, 0x01: true, 0x02: true, 0x03: true, 0x04: true, 0x05: true, 0x06: true, 0x07: true,

      // Bulk memory (proposed)

      0x08: true, 0x09: true, 0x0a: true, 0x0b: true, 0x0c: true, 0x0d: true, 0x0e: true,

      // Table (proposed)

      0x0f: true, 0x10: true, 0x11: true, 0x12: true,

      // Structure operations (experimental, internal)

      0x50: true, 0x51: true, 0x52: true, 0x53: true };

for (let i = 0; i < 256; i++) {

    if (reservedMisc.hasOwnProperty(i))

        continue;

    checkIllegalPrefixed(MiscPrefix, i);

// Illegal SIMD opcodes - the upper bound is actually very large, not much to be

// done about that.

if (!wasmSimdEnabled()) {

    for (let i = 0; i < 0x130; i++) {

        checkIllegalPrefixed(SimdPrefix, i);

} else {

    let reservedSimd = [

        0x9a, 0xa2, 0xa5, 0xa6, 0xaf, 0xb0, 0xb2, 0xb3, 0xb4, 0xbb,

        0xc2, 0xc5, 0xc6, 0xcf, 0xd0, 0xd2, 0xd3, 0xd4, 0xe2, 0xee,

        0x115, 0x116, 0x117,

        0x118, 0x119, 0x11a, 0x11b, 0x11c, 0x11d, 0x11e, 0x11f,

        0x120, 0x121, 0x122, 0x123, 0x124, 0x125, 0x126, 0x127,

        0x128, 0x129, 0x12a, 0x12b, 0x12c, 0x12d, 0x12e, 0x12f,

];

    for (let i of reservedSimd) {

        checkIllegalPrefixed(SimdPrefix, i);

// Illegal MozPrefix opcodes (all of them)

for (let i = 0; i < 256; i++)

    checkIllegalPrefixed(MozPrefix, i);

for (let prefix of [ThreadPrefix, MiscPrefix, SimdPrefix, MozPrefix]) {

    // Prefix without a subsequent opcode.  We must ask funcBody not to add an

    // End code after the prefix, so the body really is just the prefix byte.

    let binary = moduleWithSections([v2vSigSection, declSection([0]), bodySection([funcBody({locals:[], body:[prefix]}, /*withEndCode=*/false)])]);

    assertErrorMessage(() => wasmEval(binary), CompileError, /(unable to read opcode)|(Unexpected EOF)|(Unknown opcode)/);

    assertEq(WebAssembly.validate(binary), false);

// Checking stack trace.

function runStackTraceTest(moduleName, funcNames, expectedName) {

    var sections = [

        sigSection([v2vSig]),

        importSection([{sigIndex:0, module:"env", func:"callback"}]),

        declSection([0]),

        exportSection([{funcIndex:1, name: "run"}]),

        bodySection([funcBody({locals: [], body: [CallCode, varU32(0)]})]),

        customSection("whoa"),

        customSection("wee", 42),

];

    if (moduleName || funcNames) {

        var subsections = [];

        if (moduleName)

            subsections.push(moduleNameSubsection(moduleName));

        if (funcNames)

            subsections.push(funcNameSubsection(funcNames));

        sections.push(nameSection(subsections));

    sections.push(customSection("yay", 13));

    var result = "";

    var callback = () => {

        result = extractStackFrameFunction(new Error().stack.split('\n')[1]);

};

    wasmEval(moduleWithSections(sections), {"env": { callback }}).run();

    assertEq(result, expectedName);

};

runStackTraceTest(null, null, 'wasm-function[1]');

runStackTraceTest(null, [{name:'blah'}, {name:'test'}], 'test');

runStackTraceTest(null, [{name:'test', index:1}], 'test');

runStackTraceTest(null, [{name:'blah'}, {name:'test', locals: [{name: 'var1'}, {name: 'var2'}]}], 'test');

runStackTraceTest(null, [{name:'blah'}, {name:'test', locals: [{name: 'var1'}, {name: 'var2'}]}], 'test');

runStackTraceTest(null, [{name:'blah'}, {name:'test1'}], 'test1');

runStackTraceTest(null, [{name:'blah'}, {name:'test☃'}], 'test☃');

runStackTraceTest(null, [{name:'blah'}, {name:'te\xE0\xFF'}], 'te\xE0\xFF');

runStackTraceTest(null, [{name:'blah'}], 'wasm-function[1]');

runStackTraceTest(null, [], 'wasm-function[1]');

runStackTraceTest("", [{name:'blah'}, {name:'test'}], 'test');

runStackTraceTest("a", [{name:'blah'}, {name:'test'}], 'a.test');

// Notice that invalid names section content shall not fail the parsing

runStackTraceTest(null, [{name:'blah'}, {name:'test', index: 2}], 'wasm-function[1]'); // invalid index

runStackTraceTest(null, [{name:'blah'}, {name:'test', index: 100000}], 'wasm-function[1]'); // invalid index

runStackTraceTest(null, [{name:'blah'}, {name:'test', nameLen: 100}], 'wasm-function[1]'); // invalid name size

runStackTraceTest(null, [{name:'blah'}, {name:''}], 'wasm-function[1]'); // empty name

// Enable and disable Gecko profiling mode, to ensure all live instances

// names won't make us crash.

enableGeckoProfiling();

disableGeckoProfiling();

function testValidNameSectionWithProfiling() {

    enableGeckoProfiling();

    wasmEval(moduleWithSections([v2vSigSection, declSec, bodySec, nameSec]));

    disableGeckoProfiling();

testValidNameSectionWithProfiling();

// Memory alignment can use non-minimal LEB128

wasmEval(moduleWithSections([

    v2vSigSection,

    declSection([0]),

    memorySection(0),

    bodySection([

        funcBody({locals: [], body: [

            I32ConstCode, 0x00, // i32.const 0

            I32Load,

                0x81, 0x00, // alignment 1, non-minimal

                0x00, // offset 0

            DropCode,

        ]}),

]),

]));

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