050bf39d85
matching function, creates a hashmap the specialises the case of keys that simply check pointer equality. I measure an average ~1% improvement on Octane code-load. Review-Url: https://codereview.chromium.org/2369963002 Cr-Commit-Position: refs/heads/master@{#39920}
50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
// Copyright 2015 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_PROFILER_STRINGS_STORAGE_H_
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#define V8_PROFILER_STRINGS_STORAGE_H_
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#include <stdarg.h>
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#include "src/allocation.h"
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#include "src/base/compiler-specific.h"
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#include "src/base/hashmap.h"
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namespace v8 {
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namespace internal {
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// Provides a storage of strings allocated in C++ heap, to hold them
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// forever, even if they disappear from JS heap or external storage.
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class StringsStorage {
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public:
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explicit StringsStorage(Heap* heap);
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~StringsStorage();
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const char* GetCopy(const char* src);
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PRINTF_FORMAT(2, 3) const char* GetFormatted(const char* format, ...);
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PRINTF_FORMAT(2, 0)
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const char* GetVFormatted(const char* format, va_list args);
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const char* GetName(Name* name);
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const char* GetName(int index);
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const char* GetFunctionName(Name* name);
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const char* GetFunctionName(const char* name);
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size_t GetUsedMemorySize() const;
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private:
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static const int kMaxNameSize = 1024;
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static bool StringsMatch(void* key1, void* key2);
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const char* AddOrDisposeString(char* str, int len);
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base::CustomMatcherHashMap::Entry* GetEntry(const char* str, int len);
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uint32_t hash_seed_;
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base::CustomMatcherHashMap names_;
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DISALLOW_COPY_AND_ASSIGN(StringsStorage);
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};
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} // namespace internal
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} // namespace v8
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#endif // V8_PROFILER_STRINGS_STORAGE_H_
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