JavaScriptCore-7600.1.4.13.1.tar.gz

[apple/javascriptcore.git] / bytecode / ValueProfile.h

diff --git a/bytecode/ValueProfile.h b/bytecode/ValueProfile.h
index 73e363a8b427519ee4b1c14fd737eb6e89a1b990..99a9516c9e6deb1f0e5f659326e652a94e332564 100644 (file)
--- a/bytecode/ValueProfile.h
+++ b/bytecode/ValueProfile.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
+ * Copyright (C) 2011, 2012, 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -10,7 +10,7 @@
  * 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.
- * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
  *     its contributors may be used to endorse or promote products derived
  *     from this software without specific prior written permission.
  *
@@ -29,14 +29,14 @@
 #ifndef ValueProfile_h
 #define ValueProfile_h
 
-#include <wtf/Platform.h>
-
-#if ENABLE(VALUE_PROFILER)
-
+#include "ConcurrentJITLock.h"
+#include "Heap.h"
 #include "JSArray.h"
-#include "PredictedType.h"
+#include "SpeculatedType.h"
 #include "Structure.h"
 #include "WriteBarrier.h"
+#include <wtf/PrintStream.h>
+#include <wtf/StringPrintStream.h>
 
 namespace JSC {
 
@@ -49,7 +49,7 @@ struct ValueProfileBase {
     
     ValueProfileBase()
         : m_bytecodeOffset(-1)
-        , m_prediction(PredictNone)
+        , m_prediction(SpecNone)
         , m_numberOfSamplesInPrediction(0)
     {
         for (unsigned i = 0; i < totalNumberOfBuckets; ++i)
@@ -58,7 +58,7 @@ struct ValueProfileBase {
     
     ValueProfileBase(int bytecodeOffset)
         : m_bytecodeOffset(bytecodeOffset)
-        , m_prediction(PredictNone)
+        , m_prediction(SpecNone)
         , m_numberOfSamplesInPrediction(0)
     {
         for (unsigned i = 0; i < totalNumberOfBuckets; ++i)
@@ -106,28 +106,35 @@ struct ValueProfileBase {
         return false;
     }
     
-    void dump(FILE* out)
+    CString briefDescription(const ConcurrentJITLocker& locker)
     {
-        fprintf(out,
-                "samples = %u, prediction = %s",
-                totalNumberOfSamples(),
-                predictionToString(m_prediction));
+        computeUpdatedPrediction(locker);
+        
+        StringPrintStream out;
+        out.print("predicting ", SpeculationDump(m_prediction));
+        return out.toCString();
+    }
+    
+    void dump(PrintStream& out)
+    {
+        out.print("samples = ", totalNumberOfSamples(), " prediction = ", SpeculationDump(m_prediction));
         bool first = true;
         for (unsigned i = 0; i < totalNumberOfBuckets; ++i) {
             JSValue value = JSValue::decode(m_buckets[i]);
             if (!!value) {
                 if (first) {
-                    fprintf(out, ": ");
+                    out.printf(": ");
                     first = false;
                 } else
-                    fprintf(out, ", ");
-                fprintf(out, "%s", value.description());
+                    out.printf(", ");
+                out.print(value);
             }
         }
     }
     
-    // Updates the prediction and returns the new one.
-    PredictedType computeUpdatedPrediction()
+    // Updates the prediction and returns the new one. Never call this from any thread
+    // that isn't executing the code.
+    SpeculatedType computeUpdatedPrediction(const ConcurrentJITLocker&)
     {
         for (unsigned i = 0; i < totalNumberOfBuckets; ++i) {
             JSValue value = JSValue::decode(m_buckets[i]);
@@ -135,7 +142,7 @@ struct ValueProfileBase {
                 continue;
             
             m_numberOfSamplesInPrediction++;
-            mergePrediction(m_prediction, predictionFromValue(value));
+            mergeSpeculation(m_prediction, speculationFromValue(value));
             
             m_buckets[i] = JSValue::encode(JSValue());
         }
@@ -145,7 +152,7 @@ struct ValueProfileBase {
     
     int m_bytecodeOffset; // -1 for prologue
     
-    PredictedType m_prediction;
+    SpeculatedType m_prediction;
     unsigned m_numberOfSamplesInPrediction;
     
     EncodedJSValue m_buckets[totalNumberOfBuckets];
@@ -201,7 +208,5 @@ inline int getRareCaseProfileBytecodeOffset(RareCaseProfile* rareCaseProfile)
 
 } // namespace JSC
 
-#endif // ENABLE(VALUE_PROFILER)
-
 #endif // ValueProfile_h