Environment.h - mozsearch

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-

 * vim: set ts=8 sts=2 et sw=2 tw=80:

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef debugger_Environment_h

#define debugger_Environment_h

#include "mozilla/Assertions.h"  // for AssertionConditionType, MOZ_ASSERT

#include "mozilla/Maybe.h"       // for Maybe

#include "jstypes.h"            // for JS_PUBLIC_API

#include "NamespaceImports.h"   // for Value, HandleId, HandleObject

#include "debugger/Debugger.h"  // for Env

#include "js/PropertySpec.h"    // for JSFunctionSpec, JSPropertySpec

#include "js/RootingAPI.h"      // for Handle, MutableHandle

#include "vm/NativeObject.h"    // for NativeObject

#include "vm/Scope.h"           // for ScopeKind

class JS_PUBLIC_API JSObject;

struct JS_PUBLIC_API JSContext;

class JSTracer;

namespace js {

class GlobalObject;

enum class DebuggerEnvironmentType { Declarative, With, Object };

class DebuggerEnvironment : public NativeObject {

 public:

  enum { ENV_SLOT, OWNER_SLOT, RESERVED_SLOTS };

  static const JSClass class_;

  static NativeObject* initClass(JSContext* cx, Handle<GlobalObject*> global,

                                 HandleObject dbgCtor);

  static DebuggerEnvironment* create(JSContext* cx, HandleObject proto,

                                     HandleObject referent,

                                     Handle<NativeObject*> debugger);

  void trace(JSTracer* trc);

  DebuggerEnvironmentType type() const;

  mozilla::Maybe<ScopeKind> scopeKind() const;

  [[nodiscard]] bool getParent(

      JSContext* cx, MutableHandle<DebuggerEnvironment*> result) const;

  [[nodiscard]] bool getObject(JSContext* cx,

                               MutableHandle<DebuggerObject*> result) const;

  [[nodiscard]] bool getCalleeScript(

      JSContext* cx, MutableHandle<DebuggerScript*> result) const;

  bool isDebuggee() const;

  bool isOptimized() const;

  [[nodiscard]] static bool getNames(JSContext* cx,

                                     Handle<DebuggerEnvironment*> environment,

                                     MutableHandleIdVector result);

  [[nodiscard]] static bool find(JSContext* cx,

                                 Handle<DebuggerEnvironment*> environment,

                                 HandleId id,

                                 MutableHandle<DebuggerEnvironment*> result);

  [[nodiscard]] static bool getVariable(

      JSContext* cx, Handle<DebuggerEnvironment*> environment, HandleId id,

      MutableHandleValue result);

  [[nodiscard]] static bool setVariable(

      JSContext* cx, Handle<DebuggerEnvironment*> environment, HandleId id,

      HandleValue value);

  Debugger* owner() const;

  Env* maybeReferent() const { return maybePtrFromReservedSlot<Env>(ENV_SLOT); }

  Env* referent() const {

    Env* env = maybeReferent();

    MOZ_ASSERT(env);

    return env;

  void clearReferent() { clearReservedSlotGCThingAsPrivate(ENV_SLOT); }

 private:

  static const JSClassOps classOps_;

  static const JSPropertySpec properties_[];

  static const JSFunctionSpec methods_[];

  bool requireDebuggee(JSContext* cx) const;

  [[nodiscard]] static bool construct(JSContext* cx, unsigned argc, Value* vp);

  struct CallData;

};

} /* namespace js */

#endif /* debugger_Environment_h */