webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 72 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/tools/VMInspector.h b/Source/JavaScriptCore/tools/VMInspector.h
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+++ b/Source/JavaScriptCore/tools/VMInspector.h
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+/*
+ * Copyright (C) 2017 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.
+ */
+
+#pragma once
+
+#include "VM.h"
+#include <wtf/DoublyLinkedList.h>
+#include <wtf/Expected.h>
+#include <wtf/Lock.h>
+
+namespace JSC {
+
+class VMInspector {
+public:
+    enum class Error {
+        None,
+        TimedOut
+    };
+
+    typedef WTF::Locker<Lock> Locker;
+
+    static VMInspector& instance();
+
+    void add(VM*);
+    void remove(VM*);
+
+    Expected<Locker, Error> lock(Seconds timeout = Seconds::infinity());
+
+    Expected<bool, Error> isValidExecutableMemory(const Locker&, void*);
+    Expected<CodeBlock*, Error> codeBlockForMachinePC(const Locker&, void*);
+
+private:
+    enum class FunctorStatus {
+        Continue,
+        Done
+    };
+    template <typename Functor> void iterate(const Functor& functor)
+    {
+        for (VM* vm = m_list.head(); vm; vm = vm->next()) {
+            FunctorStatus status = functor(*vm);
+            if (status == FunctorStatus::Done)
+                return;
+        }
+    }
+
+    Lock m_lock;
+    DoublyLinkedList<VM> m_list;
+};
+
+} // namespace JSC