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Unified Diff: src/profiler/sampler.h

Issue 1922303002: Create libsampler as V8 sampler library. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Fix TSAN failure Created 4 years, 7 months ago
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Index: src/profiler/sampler.h
diff --git a/src/profiler/sampler.h b/src/profiler/sampler.h
deleted file mode 100644
index 3d3a6e997ffb3b891a16093c53db74e7c01075ed..0000000000000000000000000000000000000000
--- a/src/profiler/sampler.h
+++ /dev/null
@@ -1,108 +0,0 @@
-// Copyright 2013 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef V8_PROFILER_SAMPLER_H_
-#define V8_PROFILER_SAMPLER_H_
-
-#include "include/v8.h"
-
-#include "src/base/atomicops.h"
-#include "src/base/macros.h"
-
-namespace v8 {
-namespace internal {
-
-class Isolate;
-struct TickSample;
-
-// ----------------------------------------------------------------------------
-// Sampler
-//
-// A sampler periodically samples the state of the VM and optionally
-// (if used for profiling) the program counter and stack pointer for
-// the thread that created it.
-
-class Sampler {
- public:
- // Initializes the Sampler support. Called once at VM startup.
- static void SetUp();
- static void TearDown();
-
- // Initialize sampler.
- Sampler(Isolate* isolate, int interval);
- virtual ~Sampler();
-
- Isolate* isolate() const { return isolate_; }
- int interval() const { return interval_; }
-
- // Performs stack sampling.
- void SampleStack(const v8::RegisterState& regs);
-
- // Start and stop sampler.
- void Start();
- void Stop();
-
- // Whether the sampling thread should use this Sampler for CPU profiling?
- bool IsProfiling() const {
- return base::NoBarrier_Load(&profiling_) > 0 &&
- !base::NoBarrier_Load(&has_processing_thread_);
- }
- void IncreaseProfilingDepth();
- void DecreaseProfilingDepth();
-
- // Whether the sampler is running (that is, consumes resources).
- bool IsActive() const { return base::NoBarrier_Load(&active_); }
-
- // CpuProfiler collects samples by calling DoSample directly
- // without calling Start. To keep it working, we register the sampler
- // with the CpuProfiler.
- bool IsRegistered() const { return base::NoBarrier_Load(&registered_); }
-
- void DoSample();
- // If true next sample must be initiated on the profiler event processor
- // thread right after latest sample is processed.
- void SetHasProcessingThread(bool value) {
- base::NoBarrier_Store(&has_processing_thread_, value);
- }
-
- // Used in tests to make sure that stack sampling is performed.
- unsigned js_sample_count() const { return js_sample_count_; }
- unsigned external_sample_count() const { return external_sample_count_; }
- void StartCountingSamples() {
- js_sample_count_ = 0;
- external_sample_count_ = 0;
- is_counting_samples_ = true;
- }
-
- class PlatformData;
- PlatformData* platform_data() const { return data_; }
-
- protected:
- // This method is called for each sampling period with the current
- // program counter.
- virtual void Tick(TickSample* sample) = 0;
-
- private:
- void SetActive(bool value) { base::NoBarrier_Store(&active_, value); }
-
- void SetRegistered(bool value) { base::NoBarrier_Store(&registered_, value); }
-
- Isolate* isolate_;
- const int interval_;
- base::Atomic32 profiling_;
- base::Atomic32 has_processing_thread_;
- base::Atomic32 active_;
- base::Atomic32 registered_;
- PlatformData* data_; // Platform specific data.
- // Counts stack samples taken in various VM states.
- bool is_counting_samples_;
- unsigned js_sample_count_;
- unsigned external_sample_count_;
- DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler);
-};
-
-} // namespace internal
-} // namespace v8
-
-#endif // V8_PROFILER_SAMPLER_H_
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