JavaScriptCore-7600.1.4.9.tar.gz

[apple/javascriptcore.git] / heap / GCLogging.cpp

diff --git a/heap/GCLogging.cpp b/heap/GCLogging.cpp
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+/*
+ * Copyright (C) 2014 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. AND ITS 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 APPLE INC. OR ITS 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.
+ */
+
+#include "config.h"
+#include "GCLogging.h"
+
+#include "ClassInfo.h"
+#include "Heap.h"
+#include "HeapIterationScope.h"
+#include "JSCell.h"
+#include "JSCellInlines.h"
+
+namespace JSC {
+
+const char* GCLogging::levelAsString(Level level)
+{
+    switch (level) {
+    case None:
+        return "None";
+    case Basic:
+        return "Basic";
+    case Verbose:
+        return "Verbose";
+    default:
+        RELEASE_ASSERT_NOT_REACHED();
+        return "";
+    }
+}
+
+class LoggingFunctor {
+public:
+    LoggingFunctor(SlotVisitor& slotVisitor)
+        : m_slotVisitor(slotVisitor)
+    {
+        m_savedMarkStack.resize(m_slotVisitor.markStack().size());
+        m_slotVisitor.markStack().fillVector(m_savedMarkStack);
+    }
+
+    ~LoggingFunctor()
+    {
+        reviveCells();
+    }
+
+    void operator()(JSCell* cell)
+    {
+        m_liveCells.append(cell);
+        MarkedBlock::blockFor(cell)->clearMarked(cell);
+    }
+
+    void log()
+    {
+        m_slotVisitor.clearMarkStack();
+        for (JSCell* cell : m_liveCells) {
+            cell->methodTable()->visitChildren(cell, m_slotVisitor);
+            dataLog("\n", *cell, ":\n", m_slotVisitor);
+            for (const JSCell* neighbor : m_slotVisitor.markStack())
+                MarkedBlock::blockFor(neighbor)->clearMarked(neighbor);
+            m_slotVisitor.clearMarkStack();
+        }
+        m_slotVisitor.reset();
+    }
+
+    void reviveCells()
+    {
+        for (JSCell* cell : m_liveCells)
+            MarkedBlock::blockFor(cell)->setMarked(cell);
+
+        for (const JSCell* cell : m_savedMarkStack) {
+            m_slotVisitor.markStack().append(cell);
+            const_cast<JSCell*>(cell)->setRemembered(true);
+        }
+    }
+
+    typedef void ReturnType;
+
+    void returnValue() { };
+
+private:
+    Vector<const JSCell*> m_savedMarkStack;
+    Vector<JSCell*> m_liveCells;
+    SlotVisitor& m_slotVisitor;
+};
+
+void GCLogging::dumpObjectGraph(Heap* heap)
+{
+    LoggingFunctor loggingFunctor(heap->m_slotVisitor);
+    HeapIterationScope iterationScope(*heap);
+    heap->objectSpace().forEachLiveCell(iterationScope, loggingFunctor);
+    loggingFunctor.log();
+}
+
+} // namespace JSC