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// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#ifndef RUNTIME_VM_CODE_OBSERVERS_H_
#define RUNTIME_VM_CODE_OBSERVERS_H_
#include "vm/allocation.h"
#include "vm/globals.h"
#include "include/dart_api.h"
namespace dart {
#if !defined(PRODUCT) || defined(FORCE_INCLUDE_DISASSEMBLER)
// An abstract representation of comments associated with the given code
// object. We assume that comments are sorted by PCOffset.
class CodeComments : public ValueObject {
public:
CodeComments() = default;
virtual ~CodeComments() = default;
virtual intptr_t Length() const = 0;
virtual intptr_t PCOffsetAt(intptr_t index) const = 0;
virtual const char* CommentAt(intptr_t index) const = 0;
};
#endif // !defined(PRODUCT) || defined(FORCE_INCLUDE_DISASSEMBLER)
#if !defined(PRODUCT)
// Object observing code creation events. Used by external profilers and
// debuggers to map address ranges to function names.
class CodeObserver {
public:
CodeObserver() {}
virtual ~CodeObserver() {}
// Returns true if this observer is active and should be notified
// about newly created code objects.
virtual bool IsActive() const = 0;
// Notify code observer about a newly created code object with the
// given properties.
virtual void Notify(const char* name,
uword base,
uword prologue_offset,
uword size,
bool optimized,
const CodeComments* comments) = 0;
private:
DISALLOW_COPY_AND_ASSIGN(CodeObserver);
};
class Mutex;
class CodeObservers : public AllStatic {
public:
static void Init();
static void RegisterExternal(Dart_CodeObserver observer);
static void Register(CodeObserver* observer);
// Notify all active code observers about a newly created code object.
static void NotifyAll(const char* name,
uword base,
uword prologue_offset,
uword size,
bool optimized,
const CodeComments* comments);
// Returns true if there is at least one active code observer.
static bool AreActive();
static void Cleanup();
static Mutex* mutex() { return mutex_; }
private:
static Mutex* mutex_;
static intptr_t observers_length_;
static CodeObserver** observers_;
};
#endif // !defined(PRODUCT)
} // namespace dart
#endif // RUNTIME_VM_CODE_OBSERVERS_H_