dcd078421c
This is a reland of 79d63a5ef3
. Some fixes
landed already, and two tests need to be skipped now (one with a tracking
bug).
Original change's description:
> [wasm] Remove all implications from --predictable
>
> In predictable mode, we want to execute the same code as otherwise,
> modulo timing. Hence remove any implications which change behaviour
> (like tier-up or asynchronous compilation).
> Note that --predictable is a debugging flag, so the configurations does
> not need to "make sense" in production.
>
> R=ahaas@chromium.org
>
> Bug: v8:11848
> Change-Id: If74fbacadeb087d977922c41f33fd18738b50ded
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2940898
> Commit-Queue: Clemens Backes <clemensb@chromium.org>
> Reviewed-by: Andreas Haas <ahaas@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#74973}
Bug: v8:11848
Change-Id: I3564e4351d6545bb9643d1ae44722eb2606b8961
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2944936
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75009}
43 lines
1.2 KiB
JavaScript
43 lines
1.2 KiB
JavaScript
// Copyright 2019 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 --wasm-dynamic-tiering --liftoff
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// Flags: --no-wasm-tier-up --no-stress-opt
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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 more 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_iterations = 4;
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const num_functions = 2;
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const builder = new WasmModuleBuilder();
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for (let i = 0; i < num_functions; ++i) {
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let kFunction = builder.addFunction('f' + i, kSig_i_v)
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.addBody(wasmI32Const(i))
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.exportAs('f' + i)
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}
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let instance = builder.instantiate();
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for (let i = 0; i < num_iterations - 1; ++i) {
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instance.exports.f0();
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instance.exports.f1();
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}
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assertTrue(%IsLiftoffFunction(instance.exports.f0));
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assertTrue(%IsLiftoffFunction(instance.exports.f1));
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instance.exports.f1();
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// Busy waiting until the function is tiered up.
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while (true) {
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if (!%IsLiftoffFunction(instance.exports.f1)) {
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break;
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}
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}
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assertTrue(%IsLiftoffFunction(instance.exports.f0));
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