Reserve Vector's capacity manually in CachedMetadata

third_party/WebKit/Source/bindings/core/v8/V8ScriptRunner.cpp

 /*
  * Copyright (C) 2009 Google 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
@@ skipping 135 matching lines @@
     v8::ScriptCompiler::CachedData* cachedData = new v8::ScriptCompiler::CachedData(
         reinterpret_cast<const uint8_t*>(data), length, v8::ScriptCompiler::CachedData::BufferNotOwned);
     v8::ScriptCompiler::Source source(code, origin, cachedData);
     v8::MaybeLocal<v8::Script> script = v8::ScriptCompiler::Compile(isolate->GetCurrentContext(), &source, compileOptions);
     if (cachedData->rejected)
         cacheHandler->clearCachedMetadata(CachedMetadataHandler::SendToPlatform);
     return script;
 }
 
 // Compile a script, and produce a V8 cache for future use.
-v8::MaybeLocal<v8::Script> compileAndProduceCache(CachedMetadataHandler* cacheHandler, unsigned tag, v8::ScriptCompiler::CompileOptions compileOptions, CachedMetadataHandler::CacheType cacheType, v8::Isolate* isolate, v8::Local<v8::String> code, v8::ScriptOrigin origin)
+v8::MaybeLocal<v8::Script> compileAndProduceCache(CachedMetadataHandler* cacheHandler, uint32_t tag, v8::ScriptCompiler::CompileOptions compileOptions, CachedMetadataHandler::CacheType cacheType, v8::Isolate* isolate, v8::Local<v8::String> code, v8::ScriptOrigin origin)
 {
     V8CompileHistogram histogramScope(V8CompileHistogram::Cacheable);
     v8::ScriptCompiler::Source source(code, origin);
     v8::MaybeLocal<v8::Script> script = v8::ScriptCompiler::Compile(isolate->GetCurrentContext(), &source, compileOptions);
     const v8::ScriptCompiler::CachedData* cachedData = source.GetCachedData();
     if (cachedData) {
         const char* data = reinterpret_cast<const char*>(cachedData->data);
         int length = cachedData->length;
         if (length > 1024) {
             // Omit histogram samples for small cache data to avoid outliers.
             int cacheSizeRatio = static_cast<int>(100.0 * length / code->Length());
             DEFINE_THREAD_SAFE_STATIC_LOCAL(CustomCountHistogram, codeCacheSizeHistogram, new CustomCountHistogram("V8.CodeCacheSizeRatio", 0, 10000, 50));
             codeCacheSizeHistogram.count(cacheSizeRatio);
         }
         cacheHandler->clearCachedMetadata(CachedMetadataHandler::CacheLocally);
         cacheHandler->setCachedMetadata(tag, data, length, cacheType);
     }
     return script;
 }
 
 // Compile a script, and consume or produce a V8 Cache, depending on whether the
 // given resource already has cached data available.
-v8::MaybeLocal<v8::Script> compileAndConsumeOrProduce(CachedMetadataHandler* cacheHandler, unsigned tag, v8::ScriptCompiler::CompileOptions consumeOptions, v8::ScriptCompiler::CompileOptions produceOptions, CachedMetadataHandler::CacheType cacheType, v8::Isolate* isolate, v8::Local<v8::String> code, v8::ScriptOrigin origin)
+v8::MaybeLocal<v8::Script> compileAndConsumeOrProduce(CachedMetadataHandler* cacheHandler, uint32_t tag, v8::ScriptCompiler::CompileOptions consumeOptions, v8::ScriptCompiler::CompileOptions produceOptions, CachedMetadataHandler::CacheType cacheType, v8::Isolate* isolate, v8::Local<v8::String> code, v8::ScriptOrigin origin)
 {
     RefPtr<CachedMetadata> codeCache(cacheHandler->cachedMetadata(tag));
     return codeCache.get()
         ? compileAndConsumeCache(cacheHandler, codeCache, consumeOptions, isolate, code, origin)
         : compileAndProduceCache(cacheHandler, tag, produceOptions, cacheType, isolate, code, origin);
 }
 
 enum CacheTagKind {
     CacheTagParser = 0,
     CacheTagCode = 1,
     CacheTagTimeStamp = 3,
     CacheTagLast
 };
 
 static const int kCacheTagKindSize = 2;
 
-unsigned cacheTag(CacheTagKind kind, CachedMetadataHandler* cacheHandler)
+uint32_t cacheTag(CacheTagKind kind, CachedMetadataHandler* cacheHandler)
 {
     static_assert((1 << kCacheTagKindSize) >= CacheTagLast, "CacheTagLast must be large enough");
 
-    static unsigned v8CacheDataVersion = v8::ScriptCompiler::CachedDataVersionTag() << kCacheTagKindSize;
+    static uint32_t v8CacheDataVersion = v8::ScriptCompiler::CachedDataVersionTag() << kCacheTagKindSize;
 
     // A script can be (successfully) interpreted with different encodings,
     // depending on the page it appears in. The cache doesn't know anything
     // about encodings, but the cached data is specific to one encoding. If we
     // later load the script from the cache and interpret it with a different
     // encoding, the cached data is not valid for that encoding.
     return (v8CacheDataVersion | kind) + StringHash::hash(cacheHandler->encoding());
 }
 
 // Check previously stored timestamp.
 bool isResourceHotForCaching(CachedMetadataHandler* cacheHandler, int hotHours)
 {
     const double cacheWithinSeconds = hotHours * 60 * 60;
-    unsigned tag = cacheTag(CacheTagTimeStamp, cacheHandler);
+    uint32_t tag = cacheTag(CacheTagTimeStamp, cacheHandler);
     RefPtr<CachedMetadata> cachedMetadata = cacheHandler->cachedMetadata(tag);
     if (!cachedMetadata)
         return false;
     double timeStamp;
     const int size = sizeof(timeStamp);
     ASSERT(cachedMetadata->size() == size);
     memcpy(&timeStamp, cachedMetadata->data(), size);
     return (WTF::currentTime() - timeStamp) < cacheWithinSeconds;
 }
 
@@ skipping 79 matching lines @@
     case V8CacheOptionsCode:
     case V8CacheOptionsAlways: {
         // Use code caching for recently seen resources.
         // Use compression depending on the cache option.
         if (codeCache)
             return bind(compileAndConsumeCache, wrapPersistent(cacheHandler), codeCache, v8::ScriptCompiler::kConsumeCodeCache);
         if (cacheOptions != V8CacheOptionsAlways && !isResourceHotForCaching(cacheHandler, hotHours)) {
             V8ScriptRunner::setCacheTimeStamp(cacheHandler);
             return bind(compileWithoutOptions, V8CompileHistogram::Cacheable);
         }
-        unsigned codeCacheTag = cacheTag(CacheTagCode, cacheHandler);
+        uint32_t codeCacheTag = cacheTag(CacheTagCode, cacheHandler);
         return bind(compileAndProduceCache, wrapPersistent(cacheHandler), codeCacheTag, v8::ScriptCompiler::kProduceCodeCache, CachedMetadataHandler::SendToPlatform);
         break;
     }
 
     case V8CacheOptionsNone:
         // Shouldn't happen, as this is handled above.
         // Case is here so that compiler can check all cases are handled.
         ASSERT_NOT_REACHED();
         break;
     }
@@ skipping 237 matching lines @@
     if (ScriptForbiddenScope::isScriptForbidden()) {
         throwScriptForbiddenException(isolate);
         return v8::MaybeLocal<v8::Object>();
     }
     v8::MicrotasksScope microtasksScope(isolate, v8::MicrotasksScope::kRunMicrotasks);
     v8::MaybeLocal<v8::Object> result = function->NewInstance(isolate->GetCurrentContext(), argc, argv);
     crashIfIsolateIsDead(isolate);
     return result;
 }
 
-unsigned V8ScriptRunner::tagForParserCache(CachedMetadataHandler* cacheHandler)
+uint32_t V8ScriptRunner::tagForParserCache(CachedMetadataHandler* cacheHandler)
 {
     return cacheTag(CacheTagParser, cacheHandler);
 }
 
-unsigned V8ScriptRunner::tagForCodeCache(CachedMetadataHandler* cacheHandler)
+uint32_t V8ScriptRunner::tagForCodeCache(CachedMetadataHandler* cacheHandler)
 {
     return cacheTag(CacheTagCode, cacheHandler);
 }
 
 // Store a timestamp to the cache as hint.
 void V8ScriptRunner::setCacheTimeStamp(CachedMetadataHandler* cacheHandler)
 {
     double now = WTF::currentTime();
-    unsigned tag = cacheTag(CacheTagTimeStamp, cacheHandler);
+    uint32_t tag = cacheTag(CacheTagTimeStamp, cacheHandler);
     cacheHandler->clearCachedMetadata(CachedMetadataHandler::CacheLocally);
     cacheHandler->setCachedMetadata(tag, reinterpret_cast<char*>(&now), sizeof(now), CachedMetadataHandler::SendToPlatform);
 }
 
 void V8ScriptRunner::throwException(v8::Isolate* isolate, v8::Local<v8::Value> exception, const v8::ScriptOrigin& origin)
 {
     // In order for the current TryCatch to catch this exception and
     // call MessageCallback when SetVerbose(true), create a v8::Function
     // that calls isolate->throwException().
     // Unlike throwStackOverflowExceptionIfNeeded(), create a temporary Script
     // with the specified ScriptOrigin. When the exception was created but not
     // thrown yet, the ScriptOrigin of the thrower is set to the exception.
     // v8::Function::New() has empty ScriptOrigin, and thus the exception will
     // be "muted" (sanitized in our terminology) if CORS does not allow.
     // https://html.spec.whatwg.org/multipage/webappapis.html#report-the-error
     // Avoid compile and run scripts when API is available: crbug.com/639739
     v8::Local<v8::Script> script = compileWithoutOptions(
         V8CompileHistogram::Cacheability::Noncacheable, isolate,
         v8AtomicString(isolate, "((e) => { throw e; })"), origin)
         .ToLocalChecked();
     v8::Local<v8::Function> thrower = runCompiledInternalScript(isolate, script)
         .ToLocalChecked().As<v8::Function>();
     v8::Local<v8::Value> args[] = { exception };
     callInternalFunction(thrower, thrower, WTF_ARRAY_LENGTH(args), args, isolate);
 }
 
 } // namespace blink