AuroraMiddleware/v8
1
0
Fork 0
Code Issues 2 Pull Requests Releases Wiki Activity

Revert of [wasm] Add a JavaScript utility to make it easier to build WASM modules from JavaScript. (patchset #2 id:20001 of https://codereview.chromium.org/1762203002/ )

Browse Source 
Reason for revert:
New test test-wasm-module-builder fails on Linux - shared bot:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20shared/builds/8793

Original issue's description:
> [wasm] Add a JavaScript utility to make it easier to build WASM modules from JavaScript.
>
> R=binji@chromium.org,seththompson@chromium.org
> BUG=
>
> Committed: https://crrev.com/d130c6bdc6a424b068614592a0b79a34750af0fc
> Cr-Commit-Position: refs/heads/master@{#34513}

TBR=binji@chromium.org,seththompson@chromium.org,titzer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1771553002

Cr-Commit-Position: refs/heads/master@{#34514}
This commit is contained in:
adamk 2016-03-04 18:20:49 -08:00 committed by Commit bot
parent d130c6bdc6
commit 6479b01aff
2 changed files with 0 additions and 401 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

90
test/mjsunit/wasm/test-wasm-module-builder.js
View File

@ -1,90 +0,0 @@
// 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.
// Flags: --expose-wasm
load('test/mjsunit/wasm/wasm-constants.js');
load('test/mjsunit/wasm/wasm-module-builder.js');
var debug = (arguments[0] == "debug");
(function BasicTest() {
var module = new WasmModuleBuilder();
module.addMemory(1, 2, false);
module.addFunction("foo", [kAstI32])
.addBody([kExprI8Const, 11])
.exportAs("blarg");
var buffer = module.toBuffer(debug);
var instance = _WASMEXP_.instantiateModule(buffer);
assertEquals(11, instance.exports.blarg());
})();
(function ImportTest() {
var module = new WasmModuleBuilder();
var index = module.addImport("print", [kAstStmt, kAstI32]);
module.addFunction("foo", [kAstStmt])
.addBody([kExprCallImport, index, kExprI8Const, 13])
.exportAs("main");
var buffer = module.toBuffer(debug);
var instance = _WASMEXP_.instantiateModule(buffer, {print: print});
print("should print 13! ");
instance.exports.main();
})();
(function LocalsTest() {
var module = new WasmModuleBuilder();
module.addFunction(undefined, [kAstI32, kAstI32])
.addLocals({i32_count: 1})
.addBody([kExprSetLocal, 1, kExprGetLocal, 0])
.exportAs("main");
var buffer = module.toBuffer(debug);
var instance = _WASMEXP_.instantiateModule(buffer);
assertEquals(19, instance.exports.main(19));
assertEquals(27777, instance.exports.main(27777));
})();
(function CallTest() {
var module = new WasmModuleBuilder();
module.addFunction("add", [kAstI32, kAstI32, kAstI32])
.addBody([kExprI32Add, kExprGetLocal, 0, kExprGetLocal, 1]);
module.addFunction("main", [kAstI32, kAstI32, kAstI32])
.addBody([kExprCallFunction, 0, kExprGetLocal, 0, kExprGetLocal, 1])
.exportAs("main");
var instance = module.instantiate();
assertEquals(44, instance.exports.main(11, 33));
assertEquals(7777, instance.exports.main(2222, 5555));
})();
(function IndirectCallTest() {
var module = new WasmModuleBuilder();
module.addFunction("add", [kAstI32, kAstI32, kAstI32])
.addBody([kExprI32Add, kExprGetLocal, 0, kExprGetLocal, 1]);
module.addFunction("main", [kAstI32, kAstI32, kAstI32, kAstI32])
.addBody([kExprCallIndirect, 0, kExprGetLocal,
0, kExprGetLocal, 1, kExprGetLocal, 2])
.exportAs("main");
module.appendToFunctionTable([0]);
var instance = module.instantiate();
assertEquals(44, instance.exports.main(0, 11, 33));
assertEquals(7777, instance.exports.main(0, 2222, 5555));
assertThrows(function() { instance.exports.main(1, 1, 1); });
})();
(function DataSegmentTest() {
var module = new WasmModuleBuilder();
module.addMemory(1, 1, false);
module.addFunction("load", [kAstI32, kAstI32])
.addBody([kExprI32LoadMem, 0, kExprGetLocal, 0])
.exportAs("load");
module.addDataSegment(0, [9, 9, 9, 9], true);
var buffer = module.toBuffer(debug);
var instance = _WASMEXP_.instantiateModule(buffer);
assertEquals(151587081, instance.exports.load(0));
})();

311
test/mjsunit/wasm/wasm-module-builder.js
View File

@ -1,311 +0,0 @@
// 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.
function StringRef(string) {
this.pos = -1;
this.string = string;
}
function DataRef(data) {
this.pos = -1;
this.data = data;
}
function WasmFunctionBuilder(name, sig_index) {
this.name = name;
this.sig_index = sig_index;
this.exports = [];
}
WasmFunctionBuilder.prototype.exportAs = function(name) {
this.exports.push(name);
return this;
}
WasmFunctionBuilder.prototype.addBody = function(body) {
this.body = body;
return this;
}
WasmFunctionBuilder.prototype.addLocals = function(locals) {
this.locals = locals;
return this;
}
function WasmModuleBuilder() {
this.signatures = [];
this.imports = [];
this.functions = [];
this.exports = [];
this.function_table = [];
this.data_segments = [];
return this;
}
WasmModuleBuilder.prototype.addMemory = function(min, max, exp) {
this.memory = {min: min, max: max, exp: exp};
return this;
}
// Add a signature; format is [rettype, param0, param1, ...]
WasmModuleBuilder.prototype.addSignature = function(sig) {
// TODO: canonicalize signatures?
this.signatures.push(sig);
return this.signatures.length - 1;
}
WasmModuleBuilder.prototype.addFunction = function(name, sig) {
var sig_index = (typeof sig) == "number" ? sig : this.addSignature(sig);
var func = new WasmFunctionBuilder(name, sig_index);
func.index = this.functions.length;
this.functions.push(func);
return func;
}
WasmModuleBuilder.prototype.addImport = function(name, sig) {
var sig_index = (typeof sig) == "number" ? sig : this.addSignature(sig);
this.imports.push({name: name, sig_index: sig_index});
return this.imports.length - 1;
}
WasmModuleBuilder.prototype.addDataSegment = function(addr, data, init) {
this.data_segments.push({addr: addr, data: data, init: init});
return this.data_segments.length - 1;
}
WasmModuleBuilder.prototype.appendToFunctionTable = function(array) {
this.function_table = this.function_table.concat(array);
return this;
}
function emit_u8(bytes, val) {
bytes.push(val & 0xff);
}
function emit_u16(bytes, val) {
bytes.push(val & 0xff);
bytes.push((val >> 8) & 0xff);
}
function emit_u32(bytes, val) {
bytes.push(val & 0xff);
bytes.push((val >> 8) & 0xff);
bytes.push((val >> 16) & 0xff);
bytes.push((val >> 24) & 0xff);
}
function emit_string(bytes, string) {
bytes.push(new StringRef(string));
bytes.push(0);
bytes.push(0);
bytes.push(0);
}
function emit_data_ref(bytes, string) {
bytes.push(new DataRef(string));
bytes.push(0);
bytes.push(0);
bytes.push(0);
}
function emit_varint(bytes, val) {
while (true) {
var v = val & 0xff;
val = val >>> 7;
if (val == 0) {
bytes.push(v);
break;
}
bytes.push(v | 0x80);
}
}
WasmModuleBuilder.prototype.toArray = function(debug) {
// Add header bytes
var bytes = [];
bytes = bytes.concat([kWasmH0, kWasmH1, kWasmH2, kWasmH3,
kWasmV0, kWasmV1, kWasmV2, kWasmV3]);
// Add memory section
if (this.memory != undefined) {
if (debug) print("emitting memory @ " + bytes.length);
emit_u8(bytes, kDeclMemory);
emit_varint(bytes, this.memory.min);
emit_varint(bytes, this.memory.max);
emit_u8(bytes, this.memory.exp ? 1 : 0);
}
// Add signatures section
if (this.signatures.length > 0) {
if (debug) print("emitting signatures @ " + bytes.length);
emit_u8(bytes, kDeclSignatures);
emit_varint(bytes, this.signatures.length);
for (sig of this.signatures) {
var params = sig.length - 1;
emit_u8(bytes, params);
for (var j = 0; j < sig.length; j++) {
emit_u8(bytes, sig[j]);
}
}
}
// Add imports section
if (this.imports.length > 0) {
if (debug) print("emitting imports @ " + bytes.length);
emit_u8(bytes, kDeclImportTable);
emit_varint(bytes, this.imports.length);
for (imp of this.imports) {
emit_u16(bytes, imp.sig_index);
emit_string(bytes, "");
emit_string(bytes, imp.name);
}
}
// Add functions section
var names = false;
var exports = 0;
if (this.functions.length > 0) {
if (debug) print("emitting functions @ " + bytes.length);
emit_u8(bytes, kDeclFunctions);
emit_varint(bytes, this.functions.length);
var index = 0;
for (func of this.functions) {
var flags = 0;
var hasName = func.name != undefined && func.name.length > 0;
names = names || hasName;
if (hasName) flags |= kDeclFunctionName;
if (func.locals != undefined) flags |= kDeclFunctionLocals;
exports += func.exports.length;
emit_u8(bytes, flags);
emit_u16(bytes, func.sig_index);
if (hasName) {
emit_string(bytes, func.name);
}
if (func.locals != undefined) {
emit_u16(bytes, func.locals.i32_count);
emit_u16(bytes, func.locals.i64_count);
emit_u16(bytes, func.locals.f32_count);
emit_u16(bytes, func.locals.f64_count);
}
emit_u16(bytes, func.body.length);
for (var i = 0; i < func.body.length; i++) {
emit_u8(bytes, func.body[i]);
}
index++;
}
}
if (this.function_table.length > 0) {
if (debug) print("emitting function table @ " + bytes.length);
emit_u8(bytes, kDeclFunctionTable);
emit_varint(bytes, this.function_table.length);
for (index of this.function_table) {
emit_u16(bytes, index);
}
}
if (exports > 0) {
if (debug) print("emitting exports @ " + bytes.length);
emit_u8(bytes, kDeclExportTable);
emit_varint(bytes, exports);
for (func of this.functions) {
for (exp of func.exports) {
emit_u16(bytes, func.index);
emit_string(bytes, exp);
}
}
}
if (this.data_segments.length > 0) {
if (debug) print("emitting data segments @ " + bytes.length);
emit_u8(bytes, kDeclDataSegments);
emit_varint(bytes, this.data_segments.length);
for (seg of this.data_segments) {
emit_u32(bytes, seg.addr);
emit_data_ref(bytes, seg.data);
emit_u32(bytes, seg.data.length);
emit_u8(bytes, seg.init ? 1 : 0);
}
}
// End the module.
if (debug) print("emitting end @ " + bytes.length);
emit_u8(bytes, kDeclEnd);
// Collect references and canonicalize strings.
var strings = new Object();
var data_segments = [];
var count = 0;
for (var i = 0; i < bytes.length; i++) {
var b = bytes[i];
if (b instanceof StringRef) {
count++;
var prev = strings[b.string];
if (prev) {
bytes[i] = prev;
} else {
strings[b.string] = b;
}
}
if (b instanceof DataRef) {
data_segments.push(b);
count++;
}
}
if (count > 0) {
// Emit strings.
if (debug) print("emitting strings @ " + bytes.length);
for (str in strings) {
var ref = strings[str];
if (!(ref instanceof StringRef)) continue;
if (debug) print(" \"" + str + "\" @ " + bytes.length);
ref.pos = bytes.length;
for (var i = 0; i < str.length; i++) {
emit_u8(bytes, str.charCodeAt(i));
}
emit_u8(bytes, 0); // null terminator.
}
// Emit data.
if (debug) print("emitting data @ " + bytes.length);
for (ref of data_segments) {
ref.pos = bytes.length;
for (var i = 0; i < ref.data.length; i++) {
emit_u8(bytes, ref.data[i]);
}
}
// Update references to strings and data.
for (var i = 0; i < bytes.length; i++) {
var b = bytes[i];
if (b instanceof StringRef || b instanceof DataRef) {
bytes[i] = b.pos & 0xFF;
bytes[i + 1] = (b.pos >> 8) & 0xFF;
bytes[i + 2] = (b.pos >> 16) & 0xFF;
bytes[i + 3] = (b.pos >> 24) & 0xFF;
}
}
}
return bytes;
}
WasmModuleBuilder.prototype.toBuffer = function(debug) {
var bytes = this.toArray(debug);
var buffer = new ArrayBuffer(bytes.length);
var view = new Uint8Array(buffer);
for (var i = 0; i < bytes.length; i++) {
var val = bytes[i];
if ((typeof val) == "string") val = val.charCodeAt(0);
view[i] = val | 0;
}
return buffer;
}
WasmModuleBuilder.prototype.instantiate = function(ffi) {
var buffer = this.toBuffer();
return _WASMEXP_.instantiateModule(buffer, ffi);
}