[JSC] sourceURLStripped should be cached

https://bugs.webkit.org/show_bug.cgi?id=259969
rdar://113616170

Reviewed by Keith Miller.

262420@main introduced sourceURLStripped for error stack URLs. However this is really costly operation,
as a result, it makes error stack string generation slower. JetStream2/chai-wtb is frequently creating
this error stack string, so this is affected by this change by up to 5%.

This patch fixes the above performance issue by caching sourceURLStripped in SourceProvider.

* Source/JavaScriptCore/parser/SourceProvider.cpp:
(JSC::SourceProvider::sourceURLStripped):
* Source/JavaScriptCore/parser/SourceProvider.h:
* Source/JavaScriptCore/runtime/ScriptExecutable.h:
(JSC::ScriptExecutable::sourceURLStripped const):
* Source/JavaScriptCore/runtime/StackFrame.cpp:
(JSC::processSourceURL):
(JSC::StackFrame::sourceURL const):
(JSC::StackFrame::sourceURLStripped const):

Canonical link: https://commits.webkit.org/266728@main

Source/JavaScriptCore/parser/SourceProvider.cpp

@@ -52,6 +52,16 @@ void SourceProvider::getID()
     }
 }
 
+const String& SourceProvider::sourceURLStripped()
+{
+    if (UNLIKELY(m_sourceURL.isNull()))
+        return m_sourceURLStripped;
+    if (LIKELY(!m_sourceURLStripped.isNull()))
+        return m_sourceURLStripped;
+    m_sourceURLStripped = URL(m_sourceURL).strippedForUseAsReport();
+    return m_sourceURLStripped;
+}
+
 #if ENABLE(WEBASSEMBLY)
 BaseWebAssemblySourceProvider::BaseWebAssemblySourceProvider(const SourceOrigin& sourceOrigin, String&& sourceURL)
     : SourceProvider(sourceOrigin, WTFMove(sourceURL), String(), TextPosition(), SourceProviderSourceType::WebAssembly)

Source/JavaScriptCore/parser/SourceProvider.h

@@ -75,6 +75,7 @@ class UnlinkedFunctionCodeBlock;
 
         // This is NOT the path that should be used for computing relative paths from a script. Use SourceOrigin's URL for that, the values may or may not be the same...
         const String& sourceURL() const { return m_sourceURL; }
+        const String& sourceURLStripped();
         const String& preRedirectURL() const { return m_preRedirectURL; }
         const String& sourceURLDirective() const { return m_sourceURLDirective; }
         const String& sourceMappingURLDirective() const { return m_sourceMappingURLDirective; }
@@ -98,6 +99,7 @@ class UnlinkedFunctionCodeBlock;
         SourceProviderSourceType m_sourceType;
         SourceOrigin m_sourceOrigin;
         String m_sourceURL;
+        String m_sourceURLStripped;
         String m_preRedirectURL;
         String m_sourceURLDirective;
         String m_sourceMappingURLDirective;

Source/JavaScriptCore/runtime/ScriptExecutable.h

@@ -50,6 +50,7 @@ class ScriptExecutable : public ExecutableBase {
     const SourceOrigin& sourceOrigin() const { return m_source.provider()->sourceOrigin(); }
     // This is NOT the path that should be used for computing relative paths from a script. Use SourceOrigin's URL for that, the values may or may not be the same... This should only be used for `error.sourceURL` and stack traces.
     const String& sourceURL() const { return m_source.provider()->sourceURL(); }
+    const String& sourceURLStripped() const { return m_source.provider()->sourceURLStripped(); }
     const String& preRedirectURL() const { return m_source.provider()->preRedirectURL(); }
     int firstLine() const { return m_source.firstLine().oneBasedInt(); }
     JS_EXPORT_PRIVATE int lastLine() const;

Source/JavaScriptCore/runtime/StackFrame.cpp

@@ -58,18 +58,10 @@ SourceID StackFrame::sourceID() const
     return m_codeBlock->ownerExecutable()->sourceID();
 }
 
-String StackFrame::sourceURL(VM& vm) const
+static String processSourceURL(VM& vm, const JSC::StackFrame& frame, const String& sourceURL)
 {
-    if (m_isWasmFrame)
-        return "[wasm code]"_s;
-
-    if (!m_codeBlock)
-        return "[native code]"_s;
-
-    String sourceURL = m_codeBlock->ownerExecutable()->sourceURL();
-
     if (vm.clientData && !sourceURL.startsWithIgnoringASCIICase("http"_s)) {
-        String overrideURL = vm.clientData->overrideSourceURL(*this, sourceURL);
+        String overrideURL = vm.clientData->overrideSourceURL(frame, sourceURL);
         if (!overrideURL.isNull())
             return overrideURL;
     }
@@ -79,9 +71,26 @@ String StackFrame::sourceURL(VM& vm) const
     return emptyString();
 }
 
+String StackFrame::sourceURL(VM& vm) const
+{
+    if (m_isWasmFrame)
+        return "[wasm code]"_s;
+
+    if (!m_codeBlock)
+        return "[native code]"_s;
+
+    return processSourceURL(vm, *this, m_codeBlock->ownerExecutable()->sourceURL());
+}
+
 String StackFrame::sourceURLStripped(VM& vm) const
 {
-    return URL(sourceURL(vm)).strippedForUseAsReport();
+    if (m_isWasmFrame)
+        return "[wasm code]"_s;
+
+    if (!m_codeBlock)
+        return "[native code]"_s;
+
+    return processSourceURL(vm, *this, m_codeBlock->ownerExecutable()->sourceURLStripped());
 }
 
 String StackFrame::functionName(VM& vm) const