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Ext.cpp
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#include "Ext.h"
#include "preprocessor/llvm_includes_start.h"
#include <llvm/IR/IntrinsicInst.h>
#include "preprocessor/llvm_includes_end.h"
#include "RuntimeManager.h"
#include "Memory.h"
#include "Type.h"
#include "Endianness.h"
namespace dev
{
namespace eth
{
namespace jit
{
Ext::Ext(RuntimeManager& _runtimeManager, Memory& _memoryMan):
RuntimeHelper(_runtimeManager),
m_memoryMan(_memoryMan)
{
m_funcs = decltype(m_funcs)();
m_argAllocas = decltype(m_argAllocas)();
m_size = m_builder.CreateAlloca(Type::Size, nullptr, "env.size");
}
using FuncDesc = std::tuple<char const*, llvm::FunctionType*>;
llvm::FunctionType* getFunctionType(llvm::Type* _returnType, std::initializer_list<llvm::Type*> const& _argsTypes)
{
return llvm::FunctionType::get(_returnType, llvm::ArrayRef<llvm::Type*>{_argsTypes.begin(), _argsTypes.size()}, false);
}
std::array<FuncDesc, sizeOf<EnvFunc>::value> const& getEnvFuncDescs()
{
static std::array<FuncDesc, sizeOf<EnvFunc>::value> descs{{
FuncDesc{"env_sload", getFunctionType(Type::Void, {Type::EnvPtr, Type::WordPtr, Type::WordPtr})},
FuncDesc{"env_sstore", getFunctionType(Type::Void, {Type::EnvPtr, Type::WordPtr, Type::WordPtr})},
FuncDesc{"env_sha3", getFunctionType(Type::Void, {Type::BytePtr, Type::Size, Type::WordPtr})},
FuncDesc{"env_balance", getFunctionType(Type::Void, {Type::EnvPtr, Type::WordPtr, Type::WordPtr})},
FuncDesc{"env_create", getFunctionType(Type::Void, {Type::EnvPtr, Type::GasPtr, Type::WordPtr, Type::BytePtr, Type::Size, Type::WordPtr})},
FuncDesc{"env_call", getFunctionType(Type::Bool, {Type::EnvPtr, Type::GasPtr, Type::Gas, Type::WordPtr, Type::WordPtr, Type::BytePtr, Type::Size, Type::BytePtr, Type::Size, Type::WordPtr})},
FuncDesc{"env_log", getFunctionType(Type::Void, {Type::EnvPtr, Type::BytePtr, Type::Size, Type::WordPtr, Type::WordPtr, Type::WordPtr, Type::WordPtr})},
FuncDesc{"env_blockhash", getFunctionType(Type::Void, {Type::EnvPtr, Type::WordPtr, Type::WordPtr})},
FuncDesc{"env_extcode", getFunctionType(Type::BytePtr, {Type::EnvPtr, Type::WordPtr, Type::Size->getPointerTo()})},
FuncDesc{"ext_calldataload", getFunctionType(Type::Void, {Type::RuntimeDataPtr, Type::WordPtr, Type::WordPtr})},
}};
return descs;
}
llvm::Function* createFunc(EnvFunc _id, llvm::Module* _module)
{
auto&& desc = getEnvFuncDescs()[static_cast<size_t>(_id)];
return llvm::Function::Create(std::get<1>(desc), llvm::Function::ExternalLinkage, std::get<0>(desc), _module);
}
llvm::Value* Ext::getArgAlloca()
{
auto& a = m_argAllocas[m_argCounter];
if (!a)
{
InsertPointGuard g{getBuilder()};
auto allocaIt = getMainFunction()->front().begin();
std::advance(allocaIt, m_argCounter); // Skip already created allocas
getBuilder().SetInsertPoint(allocaIt);
a = getBuilder().CreateAlloca(Type::Word, nullptr, {"a.", std::to_string(m_argCounter)});
}
++m_argCounter;
return a;
}
llvm::Value* Ext::byPtr(llvm::Value* _value)
{
auto a = getArgAlloca();
getBuilder().CreateStore(_value, a);
return a;
}
llvm::CallInst* Ext::createCall(EnvFunc _funcId, std::initializer_list<llvm::Value*> const& _args)
{
auto& func = m_funcs[static_cast<size_t>(_funcId)];
if (!func)
func = createFunc(_funcId, getModule());
m_argCounter = 0;
return getBuilder().CreateCall(func, {_args.begin(), _args.size()});
}
llvm::Value* Ext::sload(llvm::Value* _index)
{
auto ret = getArgAlloca();
createCall(EnvFunc::sload, {getRuntimeManager().getEnvPtr(), byPtr(_index), ret}); // Uses native endianness
return m_builder.CreateLoad(ret);
}
void Ext::sstore(llvm::Value* _index, llvm::Value* _value)
{
createCall(EnvFunc::sstore, {getRuntimeManager().getEnvPtr(), byPtr(_index), byPtr(_value)}); // Uses native endianness
}
llvm::Value* Ext::calldataload(llvm::Value* _index)
{
auto ret = getArgAlloca();
createCall(EnvFunc::calldataload, {getRuntimeManager().getDataPtr(), byPtr(_index), ret});
ret = m_builder.CreateLoad(ret);
return Endianness::toNative(m_builder, ret);
}
llvm::Value* Ext::balance(llvm::Value* _address)
{
auto address = Endianness::toBE(m_builder, _address);
auto ret = getArgAlloca();
createCall(EnvFunc::balance, {getRuntimeManager().getEnvPtr(), byPtr(address), ret});
return m_builder.CreateLoad(ret);
}
llvm::Value* Ext::blockhash(llvm::Value* _number)
{
auto hash = getArgAlloca();
createCall(EnvFunc::blockhash, {getRuntimeManager().getEnvPtr(), byPtr(_number), hash});
hash = m_builder.CreateLoad(hash);
return Endianness::toNative(getBuilder(), hash);
}
llvm::Value* Ext::create(llvm::Value* _endowment, llvm::Value* _initOff, llvm::Value* _initSize)
{
auto ret = getArgAlloca();
auto begin = m_memoryMan.getBytePtr(_initOff);
auto size = m_builder.CreateTrunc(_initSize, Type::Size, "size");
createCall(EnvFunc::create, {getRuntimeManager().getEnvPtr(), getRuntimeManager().getGasPtr(), byPtr(_endowment), begin, size, ret});
llvm::Value* address = m_builder.CreateLoad(ret);
address = Endianness::toNative(m_builder, address);
return address;
}
llvm::Value* Ext::call(llvm::Value* _callGas, llvm::Value* _receiveAddress, llvm::Value* _value, llvm::Value* _inOff, llvm::Value* _inSize, llvm::Value* _outOff, llvm::Value* _outSize, llvm::Value* _codeAddress)
{
auto receiveAddress = Endianness::toBE(m_builder, _receiveAddress);
auto inBeg = m_memoryMan.getBytePtr(_inOff);
auto inSize = m_builder.CreateTrunc(_inSize, Type::Size, "in.size");
auto outBeg = m_memoryMan.getBytePtr(_outOff);
auto outSize = m_builder.CreateTrunc(_outSize, Type::Size, "out.size");
auto codeAddress = Endianness::toBE(m_builder, _codeAddress);
auto callGas = m_builder.CreateSelect(
m_builder.CreateICmpULE(_callGas, m_builder.CreateZExt(Constant::gasMax, Type::Word)),
m_builder.CreateTrunc(_callGas, Type::Gas),
Constant::gasMax);
auto ret = createCall(EnvFunc::call, {getRuntimeManager().getEnvPtr(), getRuntimeManager().getGasPtr(), callGas, byPtr(receiveAddress), byPtr(_value), inBeg, inSize, outBeg, outSize, byPtr(codeAddress)});
return m_builder.CreateZExt(ret, Type::Word, "ret");
}
llvm::Value* Ext::sha3(llvm::Value* _inOff, llvm::Value* _inSize)
{
auto begin = m_memoryMan.getBytePtr(_inOff);
auto size = m_builder.CreateTrunc(_inSize, Type::Size, "size");
auto ret = getArgAlloca();
createCall(EnvFunc::sha3, {begin, size, ret});
llvm::Value* hash = m_builder.CreateLoad(ret);
hash = Endianness::toNative(m_builder, hash);
return hash;
}
MemoryRef Ext::extcode(llvm::Value* _addr)
{
auto addr = Endianness::toBE(m_builder, _addr);
auto code = createCall(EnvFunc::extcode, {getRuntimeManager().getEnvPtr(), byPtr(addr), m_size});
auto codeSize = m_builder.CreateLoad(m_size);
auto codeSize256 = m_builder.CreateZExt(codeSize, Type::Word);
return {code, codeSize256};
}
void Ext::log(llvm::Value* _memIdx, llvm::Value* _numBytes, std::array<llvm::Value*,4> const& _topics)
{
auto begin = m_memoryMan.getBytePtr(_memIdx);
auto size = m_builder.CreateTrunc(_numBytes, Type::Size, "size");
llvm::Value* args[] = {getRuntimeManager().getEnvPtr(), begin, size, getArgAlloca(), getArgAlloca(), getArgAlloca(), getArgAlloca()};
auto topicArgPtr = &args[3];
for (auto&& topic : _topics)
{
if (topic)
m_builder.CreateStore(Endianness::toBE(m_builder, topic), *topicArgPtr);
else
*topicArgPtr = llvm::ConstantPointerNull::get(Type::WordPtr);
++topicArgPtr;
}
createCall(EnvFunc::log, {args[0], args[1], args[2], args[3], args[4], args[5], args[6]}); // TODO: use std::initializer_list<>
}
}
}
}