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94 lines
2.4 KiB
94 lines
2.4 KiB
#include "Cache.h"
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#include <unordered_map>
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#include <cassert>
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#include <iostream>
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#include <llvm/IR/Module.h>
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#include <llvm/IR/LLVMContext.h>
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#include <llvm/Support/Path.h>
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#include <llvm/Support/FileSystem.h>
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#include <llvm/Support/raw_os_ostream.h>
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namespace dev
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{
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namespace eth
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{
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namespace jit
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{
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//#define LOG(...) std::cerr << "CACHE "
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#define LOG(...) std::ostream(nullptr)
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ObjectCache* Cache::getObjectCache()
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{
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static ObjectCache objectCache;
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return &objectCache;
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}
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namespace
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{
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llvm::MemoryBuffer* lastObject;
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}
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std::unique_ptr<llvm::Module> Cache::getObject(std::string const& id)
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{
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assert(!lastObject);
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llvm::SmallString<256> cachePath;
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llvm::sys::path::system_temp_directory(false, cachePath);
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llvm::sys::path::append(cachePath, "evm_objs", id);
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#if defined(__GNUC__) && !defined(NDEBUG)
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llvm::sys::fs::file_status st;
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auto err = llvm::sys::fs::status(cachePath.str(), st);
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if (err)
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return nullptr;
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auto mtime = st.getLastModificationTime().toEpochTime();
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std::tm tm;
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strptime(__DATE__ __TIME__, " %b %d %Y %H:%M:%S", &tm);
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auto btime = (uint64_t)std::mktime(&tm);
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if (btime > mtime)
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return nullptr;
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#endif
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if (auto r = llvm::MemoryBuffer::getFile(cachePath.str(), -1, false))
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lastObject = llvm::MemoryBuffer::getMemBufferCopy(r.get()->getBuffer());
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else if (r.getError() != std::make_error_code(std::errc::no_such_file_or_directory))
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std::cerr << r.getError().message(); // TODO: Add log
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if (lastObject) // if object found create fake module
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{
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auto module = std::unique_ptr<llvm::Module>(new llvm::Module(id, llvm::getGlobalContext()));
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auto mainFuncType = llvm::FunctionType::get(llvm::IntegerType::get(llvm::getGlobalContext(), 32), {}, false);
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llvm::Function::Create(mainFuncType, llvm::Function::ExternalLinkage, id, module.get());
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}
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return nullptr;
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}
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void ObjectCache::notifyObjectCompiled(llvm::Module const* _module, llvm::MemoryBuffer const* _object)
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{
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auto&& id = _module->getModuleIdentifier();
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llvm::SmallString<256> cachePath;
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llvm::sys::path::system_temp_directory(false, cachePath);
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llvm::sys::path::append(cachePath, "evm_objs");
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if (llvm::sys::fs::create_directory(cachePath.str()))
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return; // TODO: Add log
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llvm::sys::path::append(cachePath, id);
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std::string error;
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llvm::raw_fd_ostream cacheFile(cachePath.c_str(), error, llvm::sys::fs::F_None);
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cacheFile << _object->getBuffer();
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}
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llvm::MemoryBuffer* ObjectCache::getObject(llvm::Module const*)
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{
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auto o = lastObject;
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lastObject = nullptr;
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return o;
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}
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}
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}
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}
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