ef7d657960
Add support to flush only baseline code. FLAG_flush_baseline_code controls if baseline code is flushed or not and FLAG_flush_bytecode controls if bytecode is flushed or not. With this CL it is possible to control if we want to flush only bytecode / only baseline code / both. This also lets us have different heuristics for bytecode and baseline code flushing. Bug: v8:11947 Change-Id: Ibdfb9d8be7e7d54196db7890541fa0b5d84f037e Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3060481 Reviewed-by: Omer Katz <omerkatz@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Commit-Queue: Mythri Alle <mythria@chromium.org> Cr-Commit-Position: refs/heads/master@{#76075}
58 lines
1.4 KiB
JavaScript
58 lines
1.4 KiB
JavaScript
// Copyright 2021 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: --expose-gc --stress-flush-code --allow-natives-syntax
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// Flags: --baseline-batch-compilation-threshold=0 --sparkplug
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// Flags: --no-always-sparkplug --lazy-feedback-allocation
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// Flags: --flush-baseline-code --no-flush-bytecode
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function HasBaselineCode(f) {
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let opt_status = %GetOptimizationStatus(f);
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return (opt_status & V8OptimizationStatus.kBaseline) !== 0;
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}
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function HasByteCode(f) {
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let opt_status = %GetOptimizationStatus(f);
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return (opt_status & V8OptimizationStatus.kInterpreted) !== 0;
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}
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var x = {b:20, c:30};
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function f() {
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return x.b + 10;
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}
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// Test bytecode gets flushed
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f();
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assertTrue(HasByteCode(f));
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gc();
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assertTrue(HasByteCode(f));
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// Test baseline code gets flushed but not bytecode.
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for (i = 1; i < 50; i++) {
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f();
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}
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assertTrue(HasBaselineCode(f));
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gc();
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assertFalse(HasBaselineCode(f));
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assertTrue(HasByteCode(f));
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// Check baseline code and bytecode aren't flushed if baseline code is on
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// stack.
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function f2(should_recurse) {
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if (should_recurse) {
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assertTrue(HasBaselineCode(f2));
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f2(false);
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gc();
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assertTrue(HasBaselineCode(f2));
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}
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return x.b + 10;
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}
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for (i = 1; i < 50; i++) {
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f2(false);
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}
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assertTrue(HasBaselineCode(f2));
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// Recurse with baseline code on stack
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f2(true);
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