5bb6a8399d
Modify PreProcessOsrEntry to work with OSR entries that have non-empty expression stack. Modify graph builder to take for-in state from environment instead of directly referencing emitted instructions. Extend %OptimizeFunctionOnNextCall with an argument to force OSR to make writing OSR tests easier: %OptimizeFunctionOnNextCall(f, "osr"). R=fschneider@chromium.org TEST=test/mjsunit/compiler/optimized-for-in.js Review URL: https://chromiumcodereview.appspot.com/9431030 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10796 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
189 lines
5.7 KiB
C++
189 lines
5.7 KiB
C++
// Copyright 2012 the V8 project authors. All rights reserved.
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are
|
|
// met:
|
|
//
|
|
// * Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above
|
|
// copyright notice, this list of conditions and the following
|
|
// disclaimer in the documentation and/or other materials provided
|
|
// with the distribution.
|
|
// * Neither the name of Google Inc. nor the names of its
|
|
// contributors may be used to endorse or promote products derived
|
|
// from this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
#ifndef V8_RUNTIME_PROFILER_H_
|
|
#define V8_RUNTIME_PROFILER_H_
|
|
|
|
#include "allocation.h"
|
|
#include "atomicops.h"
|
|
|
|
namespace v8 {
|
|
namespace internal {
|
|
|
|
class Isolate;
|
|
class JSFunction;
|
|
class Object;
|
|
class Semaphore;
|
|
|
|
class RuntimeProfiler {
|
|
public:
|
|
explicit RuntimeProfiler(Isolate* isolate);
|
|
|
|
static void GlobalSetup();
|
|
|
|
static inline bool IsEnabled() {
|
|
ASSERT(has_been_globally_set_up_);
|
|
return enabled_;
|
|
}
|
|
|
|
void OptimizeNow();
|
|
|
|
void NotifyTick();
|
|
|
|
void SetUp();
|
|
void Reset();
|
|
void TearDown();
|
|
|
|
Object** SamplerWindowAddress();
|
|
int SamplerWindowSize();
|
|
|
|
void NotifyICChanged() { any_ic_changed_ = true; }
|
|
|
|
void NotifyCodeGenerated(int generated_code_size) {
|
|
if (FLAG_watch_ic_patching) {
|
|
code_generated_ = true;
|
|
total_code_generated_ += generated_code_size;
|
|
}
|
|
}
|
|
|
|
// Rate limiting support.
|
|
|
|
// VM thread interface.
|
|
//
|
|
// Called by isolates when their states change.
|
|
static inline void IsolateEnteredJS(Isolate* isolate);
|
|
static inline void IsolateExitedJS(Isolate* isolate);
|
|
|
|
// Profiler thread interface.
|
|
//
|
|
// IsSomeIsolateInJS():
|
|
// The profiler thread can query whether some isolate is currently
|
|
// running JavaScript code.
|
|
//
|
|
// WaitForSomeIsolateToEnterJS():
|
|
// When no isolates are running JavaScript code for some time the
|
|
// profiler thread suspends itself by calling the wait function. The
|
|
// wait function returns true after it waited or false immediately.
|
|
// While the function was waiting the profiler may have been
|
|
// disabled so it *must check* whether it is allowed to continue.
|
|
static bool IsSomeIsolateInJS();
|
|
static bool WaitForSomeIsolateToEnterJS();
|
|
|
|
// Stops the runtime profiler thread when profiling support is being
|
|
// turned off.
|
|
static void StopRuntimeProfilerThreadBeforeShutdown(Thread* thread);
|
|
|
|
void UpdateSamplesAfterScavenge();
|
|
void RemoveDeadSamples();
|
|
void UpdateSamplesAfterCompact(ObjectVisitor* visitor);
|
|
|
|
void AttemptOnStackReplacement(JSFunction* function);
|
|
|
|
private:
|
|
static const int kSamplerWindowSize = 16;
|
|
|
|
static void HandleWakeUp(Isolate* isolate);
|
|
|
|
void Optimize(JSFunction* function, const char* reason);
|
|
|
|
void ClearSampleBuffer();
|
|
|
|
void ClearSampleBufferNewSpaceEntries();
|
|
|
|
int LookupSample(JSFunction* function);
|
|
|
|
void AddSample(JSFunction* function, int weight);
|
|
|
|
Isolate* isolate_;
|
|
|
|
int sampler_threshold_;
|
|
int sampler_threshold_size_factor_;
|
|
int sampler_ticks_until_threshold_adjustment_;
|
|
|
|
Object* sampler_window_[kSamplerWindowSize];
|
|
int sampler_window_position_;
|
|
int sampler_window_weight_[kSamplerWindowSize];
|
|
|
|
bool any_ic_changed_;
|
|
bool code_generated_;
|
|
int total_code_generated_;
|
|
|
|
// Possible state values:
|
|
// -1 => the profiler thread is waiting on the semaphore
|
|
// 0 or positive => the number of isolates running JavaScript code.
|
|
static Atomic32 state_;
|
|
static Semaphore* semaphore_;
|
|
|
|
#ifdef DEBUG
|
|
static bool has_been_globally_set_up_;
|
|
#endif
|
|
static bool enabled_;
|
|
};
|
|
|
|
|
|
// Rate limiter intended to be used in the profiler thread.
|
|
class RuntimeProfilerRateLimiter BASE_EMBEDDED {
|
|
public:
|
|
RuntimeProfilerRateLimiter() {}
|
|
|
|
// Suspends the current thread (which must be the profiler thread)
|
|
// when not executing JavaScript to minimize CPU usage. Returns
|
|
// whether the thread was suspended (and so must check whether
|
|
// profiling is still active.)
|
|
//
|
|
// Does nothing when runtime profiling is not enabled.
|
|
bool SuspendIfNecessary();
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(RuntimeProfilerRateLimiter);
|
|
};
|
|
|
|
|
|
// Implementation of RuntimeProfiler inline functions.
|
|
|
|
void RuntimeProfiler::IsolateEnteredJS(Isolate* isolate) {
|
|
Atomic32 new_state = NoBarrier_AtomicIncrement(&state_, 1);
|
|
if (new_state == 0) {
|
|
// Just incremented from -1 to 0. -1 can only be set by the
|
|
// profiler thread before it suspends itself and starts waiting on
|
|
// the semaphore.
|
|
HandleWakeUp(isolate);
|
|
}
|
|
ASSERT(new_state >= 0);
|
|
}
|
|
|
|
|
|
void RuntimeProfiler::IsolateExitedJS(Isolate* isolate) {
|
|
Atomic32 new_state = NoBarrier_AtomicIncrement(&state_, -1);
|
|
ASSERT(new_state >= 0);
|
|
USE(new_state);
|
|
}
|
|
|
|
} } // namespace v8::internal
|
|
|
|
#endif // V8_RUNTIME_PROFILER_H_
|