77 lines
2.7 KiB
C
77 lines
2.7 KiB
C
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// Copyright 2010 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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#ifndef V8_RUNTIME_PROFILER_H_
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#define V8_RUNTIME_PROFILER_H_
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#include "v8.h"
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#include "allocation.h"
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namespace v8 {
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namespace internal {
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class RuntimeProfiler : public AllStatic {
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public:
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static bool IsEnabled() { return V8::UseCrankshaft() && FLAG_opt; }
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static void OptimizeNow();
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static void OptimizeSoon(JSFunction* function);
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static void NotifyTick();
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static void Setup();
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static void Reset();
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static void TearDown();
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static void MarkCompactPrologue(bool is_compacting);
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static Object** SamplerWindowAddress();
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static int SamplerWindowSize();
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};
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// Rate limiter intended to be used in the profiler thread.
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class RuntimeProfilerRateLimiter BASE_EMBEDDED {
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public:
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RuntimeProfilerRateLimiter() : non_js_ticks_(0) { }
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// Suspends the current thread when not executing JavaScript to
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// minimize CPU usage. Returns whether this thread was suspended
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// (and so might have to check whether profiling is still active.)
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//
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// Does nothing when runtime profiling is not enabled.
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bool SuspendIfNecessary();
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private:
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int non_js_ticks_;
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DISALLOW_COPY_AND_ASSIGN(RuntimeProfilerRateLimiter);
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};
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} } // namespace v8::internal
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#endif // V8_RUNTIME_PROFILER_H_
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