From 470286ecfe79d59df14944e5b5d34630fc739391 Mon Sep 17 00:00:00 2001
From: Simon Hausmann <simon.hausmann@digia.com>
Date: Thu, 22 Nov 2012 09:09:45 +0100
Subject: Imported WebKit commit e89504fa9195b2063b2530961d4b73dd08de3242
 (http://svn.webkit.org/repository/webkit/trunk@135485)

Change-Id: I03774e5ac79721c13ffa30d152537a74d0b12e66
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
---
 Source/JavaScriptCore/runtime/CodeCache.cpp | 37 ++++++++++++-----------------
 1 file changed, 15 insertions(+), 22 deletions(-)

(limited to 'Source/JavaScriptCore/runtime/CodeCache.cpp')

diff --git a/Source/JavaScriptCore/runtime/CodeCache.cpp b/Source/JavaScriptCore/runtime/CodeCache.cpp
index 4de760e49..068919528 100644
--- a/Source/JavaScriptCore/runtime/CodeCache.cpp
+++ b/Source/JavaScriptCore/runtime/CodeCache.cpp
@@ -36,7 +36,6 @@
 namespace JSC {
 
 CodeCache::CodeCache()
-    : m_randomGenerator(static_cast<uint32_t>(randomNumber() * UINT32_MAX))
 {
 }
 
@@ -67,9 +66,9 @@ UnlinkedCodeBlockType* CodeCache::getCodeBlock(JSGlobalData& globalData, Executa
     CodeBlockKey key = makeCodeBlockKey(source, CacheTypes<UnlinkedCodeBlockType>::codeType, strictness);
     bool storeInCache = false;
     if (debuggerMode == DebuggerOff && profilerMode == ProfilerOff) {
-        CodeBlockIndicesMap::iterator result = m_cachedCodeBlockIndices.find(key);
-        if (result != m_cachedCodeBlockIndices.end()) {
-            UnlinkedCodeBlockType* unlinkedCode = jsCast<UnlinkedCodeBlockType*>(m_cachedCodeBlocks[result->value].second.get());
+        const Strong<UnlinkedCodeBlock>* result = m_cachedCodeBlocks.find(key);
+        if (result) {
+            UnlinkedCodeBlockType* unlinkedCode = jsCast<UnlinkedCodeBlockType*>(result->get());
             unsigned firstLine = source.firstLine() + unlinkedCode->firstLine();
             executable->recordParse(unlinkedCode->codeFeatures(), unlinkedCode->hasCapturedVariables(), firstLine, firstLine + unlinkedCode->lineCount());
             return unlinkedCode;
@@ -91,14 +90,8 @@ UnlinkedCodeBlockType* CodeCache::getCodeBlock(JSGlobalData& globalData, Executa
     if (error.m_type != ParserError::ErrorNone)
         return 0;
 
-    if (storeInCache) {
-        size_t index = m_randomGenerator.getUint32() % kMaxCodeBlockEntries;
-        if (m_cachedCodeBlocks[index].second)
-            m_cachedCodeBlockIndices.remove(m_cachedCodeBlocks[index].first);
-        m_cachedCodeBlockIndices.set(key, index);
-        m_cachedCodeBlocks[index].second.set(globalData, unlinkedCode);
-        m_cachedCodeBlocks[index].first = key;
-    }
+    if (storeInCache)
+        m_cachedCodeBlocks.add(key, Strong<UnlinkedCodeBlock>(globalData, unlinkedCode));
 
     return unlinkedCode;
 }
@@ -133,6 +126,7 @@ UnlinkedFunctionCodeBlock* CodeCache::generateFunctionCodeBlock(JSGlobalData& gl
     body->destroyData();
     if (error.m_type != ParserError::ErrorNone)
         return 0;
+    m_cachedFunctionCode.add(result, Strong<UnlinkedFunctionCodeBlock>(globalData, result));
     return result;
 }
 
@@ -149,9 +143,9 @@ CodeCache::GlobalFunctionKey CodeCache::makeGlobalFunctionKey(const SourceCode&
 UnlinkedFunctionExecutable* CodeCache::getFunctionExecutableFromGlobalCode(JSGlobalData& globalData, const Identifier& name, const SourceCode& source, ParserError& error)
 {
     GlobalFunctionKey key = makeGlobalFunctionKey(source, name.string());
-    GlobalFunctionIndicesMap::iterator result = m_cachedGlobalFunctionIndices.find(key);
-    if (result != m_cachedGlobalFunctionIndices.end())
-        return m_cachedGlobalFunctions[result->value].second.get();
+    const Strong<UnlinkedFunctionExecutable>* result = m_cachedGlobalFunctions.find(key);
+    if (result)
+        return result->get();
 
     RefPtr<ProgramNode> program = parse<ProgramNode>(&globalData, source, 0, Identifier(), JSParseNormal, JSParseProgramCode, error);
     if (!program) {
@@ -173,14 +167,13 @@ UnlinkedFunctionExecutable* CodeCache::getFunctionExecutableFromGlobalCode(JSGlo
     UnlinkedFunctionExecutable* functionExecutable = UnlinkedFunctionExecutable::create(&globalData, source, body);
     functionExecutable->m_nameValue.set(globalData, functionExecutable, jsString(&globalData, name.string()));
 
-    size_t index = m_randomGenerator.getUint32() % kMaxGlobalFunctionEntries;
-    if (m_cachedGlobalFunctions[index].second)
-        m_cachedGlobalFunctionIndices.remove(m_cachedGlobalFunctions[index].first);
-    m_cachedGlobalFunctionIndices.set(key, index);
-    m_cachedGlobalFunctions[index].second.set(globalData, functionExecutable);
-    m_cachedGlobalFunctions[index].first = key;
-
+    m_cachedGlobalFunctions.add(key, Strong<UnlinkedFunctionExecutable>(globalData, functionExecutable));
     return functionExecutable;
 }
 
+void CodeCache::usedFunctionCode(JSGlobalData& globalData, UnlinkedFunctionCodeBlock* codeBlock)
+{
+    m_cachedFunctionCode.add(codeBlock, Strong<UnlinkedFunctionCodeBlock>(globalData, codeBlock));
+}
+
 }
-- 
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