f2a9026d9a
(if the test ran too slow, optimization kicked in earlier than expected by the test) TEST=mjsunit/assert-opt-and-deopt.js no longer flaky Review URL: http://codereview.chromium.org/7298001 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8511 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
182 lines
5.4 KiB
JavaScript
182 lines
5.4 KiB
JavaScript
// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Flags: --allow-natives-syntax
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/**
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* This class shows how to use %GetOptimizationCount() and
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* %GetOptimizationStatus() to infer information about opts and deopts.
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* Might be nice to put this into mjsunit.js, but that doesn't depend on
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* the --allow-natives-syntax flag so far.
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*/
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function OptTracker() {
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this.opt_counts_ = {};
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}
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/**
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* The possible optimization states of a function. Must be in sync with the
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* return values of Runtime_GetOptimizationStatus() in runtime.cc!
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* @enum {int}
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*/
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OptTracker.OptimizationState = {
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YES: 1,
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NO: 2,
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ALWAYS: 3,
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NEVER: 4
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};
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/**
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* Always call this at the beginning of your test, once for each function
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* that you later want to track de/optimizations for. It is necessary because
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* tests are sometimes executed several times in a row, and you want to
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* disregard counts from previous runs.
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*/
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OptTracker.prototype.CheckpointOptCount = function(func) {
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this.opt_counts_[func] = %GetOptimizationCount(func);
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};
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OptTracker.prototype.AssertOptCount = function(func, optcount) {
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if (this.DisableAsserts_(func)) {
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return;
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}
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assertEquals(optcount, this.GetOptCount_(func));
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};
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OptTracker.prototype.AssertDeoptCount = function(func, deopt_count) {
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if (this.DisableAsserts_(func)) {
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return;
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}
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assertEquals(deopt_count, this.GetDeoptCount_(func));
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};
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OptTracker.prototype.AssertDeoptHappened = function(func, expect_deopt) {
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if (this.DisableAsserts_(func)) {
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return;
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}
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if (expect_deopt) {
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assertTrue(this.GetDeoptCount_(func) > 0);
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} else {
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assertEquals(0, this.GetDeoptCount_(func));
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}
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}
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OptTracker.prototype.AssertIsOptimized = function(func, expect_optimized) {
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if (this.DisableAsserts_(func)) {
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return;
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}
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var raw_optimized = %GetOptimizationStatus(func);
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if (expect_optimized) {
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assertEquals(OptTracker.OptimizationState.YES, raw_optimized);
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} else {
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assertEquals(OptTracker.OptimizationState.NO, raw_optimized);
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}
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}
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/**
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* @private
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*/
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OptTracker.prototype.GetOptCount_ = function(func) {
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var raw_count = %GetOptimizationCount(func);
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if (func in this.opt_counts_) {
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var checkpointed_count = this.opt_counts_[func];
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return raw_count - checkpointed_count;
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}
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return raw_count;
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}
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/**
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* @private
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*/
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OptTracker.prototype.GetDeoptCount_ = function(func) {
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var count = this.GetOptCount_(func);
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if (%GetOptimizationStatus(func) == OptTracker.OptimizationState.YES) {
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count -= 1;
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}
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return count;
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}
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/**
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* @private
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*/
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OptTracker.prototype.DisableAsserts_ = function(func) {
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switch(%GetOptimizationStatus(func)) {
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case OptTracker.OptimizationState.YES:
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case OptTracker.OptimizationState.NO:
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return false;
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case OptTracker.OptimizationState.ALWAYS:
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case OptTracker.OptimizationState.NEVER:
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return true;
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}
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return false;
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}
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// (End of class OptTracker.)
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// Example function used by the test below.
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function f(a) {
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return a+1;
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}
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var tracker = new OptTracker();
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tracker.CheckpointOptCount(f);
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tracker.AssertOptCount(f, 0);
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tracker.AssertIsOptimized(f, false);
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tracker.AssertDeoptHappened(f, false);
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tracker.AssertDeoptCount(f, 0);
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for (var i = 0; i < 2; i++) f(1);
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tracker.AssertOptCount(f, 0);
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tracker.AssertIsOptimized(f, false);
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tracker.AssertDeoptHappened(f, false);
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tracker.AssertDeoptCount(f, 0);
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%OptimizeFunctionOnNextCall(f);
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f(1);
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tracker.AssertOptCount(f, 1);
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tracker.AssertIsOptimized(f, true);
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tracker.AssertDeoptHappened(f, false);
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tracker.AssertDeoptCount(f, 0);
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%DeoptimizeFunction(f);
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tracker.AssertOptCount(f, 1);
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tracker.AssertIsOptimized(f, false);
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tracker.AssertDeoptHappened(f, true);
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tracker.AssertDeoptCount(f, 1);
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// Let's trigger optimization for another type.
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for (var i = 0; i < 5; i++) f("a");
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%OptimizeFunctionOnNextCall(f);
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f("b");
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tracker.AssertOptCount(f, 2);
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tracker.AssertIsOptimized(f, true);
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tracker.AssertDeoptHappened(f, true);
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tracker.AssertDeoptCount(f, 1);
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