eb129a5cf1
The original CL introduced a test that does not work when it is executed concurrently on multiple isolates. This CL skips this test configuration. Original change's description: > [wasm] Lazy compilation after deserialization > > The serialization format contains one boolean flag per function which > specifies whether the function code exists in the serialized module or > not. With this CL, this boolean flag is extended to a three-value flag > which indicates whether the function exists, and if not, whether the > function was executed before serialization. This information can then be > used upon deserialization to compile only those functions that were > executed before serialization. > > Design doc: https://docs.google.com/document/d/1U3uqq4njqLqFhr1G2sU_bmpQxY-3bvfG55udSb-DvA4/edit?usp=sharing > > Bug: v8:12281 Change-Id: I36ce90b37736172aa01c47ab04e154ec8ea2d8aa Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3380590 Reviewed-by: Clemens Backes <clemensb@chromium.org> Commit-Queue: Andreas Haas <ahaas@chromium.org> Cr-Commit-Position: refs/heads/main@{#78564}
62 lines
1.9 KiB
JavaScript
62 lines
1.9 KiB
JavaScript
// Copyright 2022 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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// Flags: --allow-natives-syntax --expose-gc --wasm-dynamic-tiering --liftoff
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// Make the test faster:
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// Flags: --wasm-tiering-budget=1000
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// This test busy-waits for tier-up to be complete, hence it does not work in
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// predictable mode where we only have a single thread.
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// Flags: --no-predictable
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d8.file.execute('test/mjsunit/wasm/wasm-module-builder.js');
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const num_functions = 3;
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function create_builder() {
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const builder = new WasmModuleBuilder();
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builder.addImport("foo", "bar", kSig_i_v);
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for (let i = 0; i < num_functions; ++i) {
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builder.addFunction('f' + i, kSig_i_v)
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.addBody(wasmI32Const(i))
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.exportFunc();
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}
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return builder;
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}
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const wire_bytes = create_builder().toBuffer();
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function serializeModule() {
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const module = new WebAssembly.Module(wire_bytes);
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let instance = new WebAssembly.Instance(module, {foo: {bar: () => 1}});
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// Execute {f1} until it gets tiered up.
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while (%IsLiftoffFunction(instance.exports.f1)) {
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instance.exports.f1();
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}
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// Execute {f2} once, so that the module knows that this is a used function.
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instance.exports.f2();
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const buff = %SerializeWasmModule(module);
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return buff;
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};
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const serialized_module = serializeModule();
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// Do some GCs to make sure the first module got collected and removed from the
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// module cache.
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gc();
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gc();
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gc();
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(function testSerializedModule() {
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print(arguments.callee.name);
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const module = %DeserializeWasmModule(serialized_module, wire_bytes);
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const instance = new WebAssembly.Instance(module, {foo: {bar: () => 1}});
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assertTrue(%IsTurboFanFunction(instance.exports.f1));
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assertTrue(%IsLiftoffFunction(instance.exports.f2));
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assertTrue(
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!%IsLiftoffFunction(instance.exports.f0) &&
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!%IsTurboFanFunction(instance.exports.f0));
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})();
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