webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 128 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/jit/ICStats.cpp b/Source/JavaScriptCore/jit/ICStats.cpp
new file mode 100644
index 000000000..2080cd934
--- /dev/null
+++ b/Source/JavaScriptCore/jit/ICStats.cpp
@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 2016 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. 
+ */
+
+#include "config.h"
+#include "ICStats.h"
+
+namespace JSC {
+
+bool ICEvent::operator<(const ICEvent& other) const
+{
+    if (m_classInfo != other.m_classInfo) {
+        if (!m_classInfo)
+            return true;
+        if (!other.m_classInfo)
+            return false;
+        return strcmp(m_classInfo->className, other.m_classInfo->className) < 0;
+    }
+    
+    if (m_propertyName != other.m_propertyName)
+        return codePointCompare(m_propertyName.string(), other.m_propertyName.string()) < 0;
+    
+    return m_kind < other.m_kind;
+}
+
+void ICEvent::dump(PrintStream& out) const
+{
+    out.print(m_kind, "(", m_classInfo ? m_classInfo->className : "<null>", ", ", m_propertyName, ")");
+}
+
+void ICEvent::log() const
+{
+    ICStats::instance().add(*this);
+}
+
+Atomic<ICStats*> ICStats::s_instance;
+
+ICStats::ICStats()
+{
+    m_thread = createThread(
+        "JSC ICStats",
+        [this] () {
+            LockHolder locker(m_lock);
+            for (;;) {
+                m_condition.waitFor(
+                    m_lock, Seconds(1), [this] () -> bool { return m_shouldStop; });
+                if (m_shouldStop)
+                    break;
+                
+                dataLog("ICStats:\n");
+                auto list = m_spectrum.buildList();
+                for (unsigned i = list.size(); i--;)
+                    dataLog("    ", list[i].key, ": ", list[i].count, "\n");
+            }
+        });
+}
+
+ICStats::~ICStats()
+{
+    {
+        LockHolder locker(m_lock);
+        m_shouldStop = true;
+        m_condition.notifyAll();
+    }
+    
+    waitForThreadCompletion(m_thread);
+}
+
+void ICStats::add(const ICEvent& event)
+{
+    m_spectrum.add(event);
+}
+
+ICStats& ICStats::instance()
+{
+    for (;;) {
+        ICStats* result = s_instance.load();
+        if (result)
+            return *result;
+        
+        ICStats* newStats = new ICStats();
+        if (s_instance.compareExchangeWeak(nullptr, newStats))
+            return *newStats;
+        
+        delete newStats;
+    }
+}
+
+} // namespace JSC
+
+namespace WTF {
+
+using namespace JSC;
+
+void printInternal(PrintStream& out, ICEvent::Kind kind)
+{
+    switch (kind) {
+#define ICEVENT_KIND_DUMP(name) case ICEvent::name: out.print(#name); return;
+        FOR_EACH_ICEVENT_KIND(ICEVENT_KIND_DUMP);
+#undef ICEVENT_KIND_DUMP
+    }
+    RELEASE_ASSERT_NOT_REACHED();
+}
+
+} // namespace WTF
+
+