1 files changed, 99 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/heap/EdenGCActivityCallback.cpp b/Source/JavaScriptCore/heap/EdenGCActivityCallback.cpp
new file mode 100644
index 000000000..1db8f40b6
--- /dev/null
+++ b/Source/JavaScriptCore/heap/EdenGCActivityCallback.cpp
@@ -0,0 +1,99 @@
+/*
+ * 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 "EdenGCActivityCallback.h"
+
+#include "VM.h"
+
+namespace JSC {
+
+#if USE(CF) || USE(GLIB) || PLATFORM(QT)
+
+EdenGCActivityCallback::EdenGCActivityCallback(Heap* heap)
+    : GCActivityCallback(heap)
+{
+}
+
+void EdenGCActivityCallback::doCollection()
+{
+    m_vm->heap.collect(EdenCollection);
+}
+
+double EdenGCActivityCallback::lastGCLength()
+{
+    return m_vm->heap.lastEdenGCLength();
+}
+
+double EdenGCActivityCallback::deathRate()
+{
+    Heap* heap = &m_vm->heap;
+    size_t sizeBefore = heap->sizeBeforeLastEdenCollection();
+    size_t sizeAfter = heap->sizeAfterLastEdenCollection();
+    if (!sizeBefore)
+        return 1.0;
+    if (sizeAfter > sizeBefore) {
+        // GC caused the heap to grow(!)
+        // This could happen if the we visited more extra memory than was reported allocated.
+        // We don't return a negative death rate, since that would schedule the next GC in the past.
+        return 0;
+    }
+    return static_cast<double>(sizeBefore - sizeAfter) / static_cast<double>(sizeBefore);
+}
+
+double EdenGCActivityCallback::gcTimeSlice(size_t bytes)
+{
+    return std::min((static_cast<double>(bytes) / MB) * Options::percentCPUPerMBForEdenTimer(), Options::collectionTimerMaxPercentCPU());
+}
+
+#else
+
+EdenGCActivityCallback::EdenGCActivityCallback(Heap* heap)
+    : GCActivityCallback(heap->vm())
+{
+}
+
+void EdenGCActivityCallback::doCollection()
+{
+}
+
+double EdenGCActivityCallback::lastGCLength()
+{
+    return 0;
+}
+
+double EdenGCActivityCallback::deathRate()
+{
+    return 0;
+}
+
+double EdenGCActivityCallback::gcTimeSlice(size_t)
+{
+    return 0;
+}
+
+#endif // USE(CF) || PLATFORM(EFL)
+
+} // namespace JSC