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compile_cache.h
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84 lines (67 loc) · 2.33 KB
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#ifndef SRC_COMPILE_CACHE_H_
#define SRC_COMPILE_CACHE_H_
#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#include <cinttypes>
#include <memory>
#include <string>
#include <unordered_map>
#include "v8.h"
namespace node {
class Environment;
// TODO(joyeecheung): move it into a CacheHandler class.
enum class CachedCodeType : uint8_t {
kCommonJS = 0,
kESM,
};
struct CompileCacheEntry {
std::unique_ptr<v8::ScriptCompiler::CachedData> cache{nullptr};
uint32_t cache_key;
uint32_t code_hash;
uint32_t code_size;
std::string cache_filename;
std::string source_filename;
CachedCodeType type;
bool refreshed = false;
// Copy the cache into a new store for V8 to consume. Caller takes
// ownership.
v8::ScriptCompiler::CachedData* CopyCache() const;
};
class CompileCacheHandler {
public:
explicit CompileCacheHandler(Environment* env);
bool InitializeDirectory(Environment* env, const std::string& dir);
void Persist();
CompileCacheEntry* GetOrInsert(v8::Local<v8::String> code,
v8::Local<v8::String> filename,
CachedCodeType type);
void MaybeSave(CompileCacheEntry* entry,
v8::Local<v8::Function> func,
bool rejected);
void MaybeSave(CompileCacheEntry* entry,
v8::Local<v8::Module> mod,
bool rejected);
private:
void ReadCacheFile(CompileCacheEntry* entry);
template <typename T>
void MaybeSaveImpl(CompileCacheEntry* entry,
v8::Local<T> func_or_mod,
bool rejected);
template <typename... Args>
inline void Debug(const char* format, Args&&... args) const;
static constexpr size_t kCodeSizeOffset = 0;
static constexpr size_t kCacheSizeOffset = 1;
static constexpr size_t kCodeHashOffset = 2;
static constexpr size_t kCacheHashOffset = 3;
static constexpr size_t kHeaderCount = 4;
v8::Isolate* isolate_ = nullptr;
bool is_debug_ = false;
std::string compile_cache_dir_;
// The compile cache is stored in a directory whose name is the hex string of
// compiler_cache_key_.
uint32_t compiler_cache_key_ = 0;
std::unordered_map<uint32_t, std::unique_ptr<CompileCacheEntry>>
compiler_cache_store_;
};
} // namespace node
#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#endif // SRC_COMPILE_CACHE_H_