1 files changed, 59 insertions, 0 deletions
diff --git a/Source/WebCore/page/DiagnosticLoggingClient.h b/Source/WebCore/page/DiagnosticLoggingClient.h
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+++ b/Source/WebCore/page/DiagnosticLoggingClient.h
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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.
+ */
+
+#pragma once
+
+#include "DiagnosticLoggingResultType.h"
+#include <wtf/FastMalloc.h>
+#include <wtf/Forward.h>
+#include <wtf/RandomNumber.h>
+
+namespace WebCore {
+
+enum class ShouldSample { No, Yes };
+
+class DiagnosticLoggingClient {
+    WTF_MAKE_FAST_ALLOCATED;
+public:
+    virtual void logDiagnosticMessage(const String& message, const String& description, ShouldSample) = 0;
+    virtual void logDiagnosticMessageWithResult(const String& message, const String& description, DiagnosticLoggingResultType, ShouldSample) = 0;
+    virtual void logDiagnosticMessageWithValue(const String& message, const String& description, double value, unsigned significantFigures, ShouldSample) = 0;
+    virtual void logDiagnosticMessageWithEnhancedPrivacy(const String& message, const String& description, ShouldSample) = 0;
+
+    static bool shouldLogAfterSampling(ShouldSample);
+
+    virtual ~DiagnosticLoggingClient() { }
+};
+
+inline bool DiagnosticLoggingClient::shouldLogAfterSampling(ShouldSample shouldSample)
+{
+    if (shouldSample == ShouldSample::No)
+        return true;
+
+    static const double selectionProbability = 0.05;
+    return randomNumber() <= selectionProbability;
+}
+
+} // namespace WebCore