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Load cached object without compiling LLVM module

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This commit is contained in:
Paweł Bylica 2015-01-09 16:14:45 +01:00
parent 3990e5b97a
commit 9c244ed08e
3 changed files with 40 additions and 12 deletions
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40
libevmjit/Cache.cpp
View file

@ -3,6 +3,7 @@
#include <cassert>
#include <iostream>
#include <llvm/IR/Module.h>
#include <llvm/IR/LLVMContext.h>
#include <llvm/Support/Path.h>
#include <llvm/Support/FileSystem.h>
#include <llvm/Support/raw_os_ostream.h>
@ -23,6 +24,32 @@ ObjectCache* Cache::getObjectCache()
return &objectCache;
}
namespace
{
llvm::MemoryBuffer* lastObject;
}
std::unique_ptr<llvm::Module> Cache::getObject(std::string const& id)
{
assert(!lastObject);
llvm::SmallString<256> cachePath;
llvm::sys::path::system_temp_directory(false, cachePath);
llvm::sys::path::append(cachePath, "evm_objs", id);
if (auto r = llvm::MemoryBuffer::getFile(cachePath.str(), -1, false))
lastObject = llvm::MemoryBuffer::getMemBufferCopy(r.get()->getBuffer());
else if (r.getError() != std::make_error_code(std::errc::no_such_file_or_directory))
std::cerr << r.getError().message(); // TODO: Add log
if (lastObject) // if object found create fake module
{
auto module = std::unique_ptr<llvm::Module>(new llvm::Module(id, llvm::getGlobalContext()));
auto mainFuncType = llvm::FunctionType::get(llvm::IntegerType::get(llvm::getGlobalContext(), 32), {}, false);
auto func = llvm::Function::Create(mainFuncType, llvm::Function::ExternalLinkage, id, module.get());
}
return nullptr;
}
void ObjectCache::notifyObjectCompiled(llvm::Module const* _module, llvm::MemoryBuffer const* _object)
{
@ -43,16 +70,9 @@ void ObjectCache::notifyObjectCompiled(llvm::Module const* _module, llvm::Memory
llvm::MemoryBuffer* ObjectCache::getObject(llvm::Module const* _module)
{
auto&& id = _module->getModuleIdentifier();
llvm::SmallString<256> cachePath;
llvm::sys::path::system_temp_directory(false, cachePath);
llvm::sys::path::append(cachePath, "evm_objs", id);
if (auto r = llvm::MemoryBuffer::getFile(cachePath.str(), -1, false))
return llvm::MemoryBuffer::getMemBufferCopy(r.get()->getBuffer());
else if (r.getError() != std::make_error_code(std::errc::no_such_file_or_directory))
std::cerr << r.getError().message(); // TODO: Add log
return nullptr;
auto o = lastObject;
lastObject = nullptr;
return o;
}
}

1
libevmjit/Cache.h
View file

@ -33,6 +33,7 @@ class Cache
{
public:
static ObjectCache* getObjectCache();
static std::unique_ptr<llvm::Module> getObject(std::string const& id);
};
}

11
libevmjit/ExecutionEngine.cpp
View file

@ -74,7 +74,13 @@ ReturnCode ExecutionEngine::run(bytes const& _code, RuntimeData* _data, Env* _en
}
else
{
auto module = Compiler({}).compile(_code, mainFuncName);
bool objectCacheEnabled = true;
auto objectCache = objectCacheEnabled ? Cache::getObjectCache() : nullptr;
std::unique_ptr<llvm::Module> module;
if (objectCache)
module = Cache::getObject(mainFuncName);
if (!module)
module = Compiler({}).compile(_code, mainFuncName);
//module->dump();
if (!ee)
{
@ -100,7 +106,8 @@ ReturnCode ExecutionEngine::run(bytes const& _code, RuntimeData* _data, Env* _en
module.release(); // Successfully created llvm::ExecutionEngine takes ownership of the module
memoryManager.release(); // and memory manager
ee->setObjectCache(Cache::getObjectCache());
if (objectCache)
ee->setObjectCache(objectCache);
entryFuncPtr = (EntryFuncPtr)ee->getFunctionAddress(mainFuncName);
}
else