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#include "ExecutionEngine.h"
#include <csetjmp>
#include <chrono>
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#include <llvm/IR/LLVMContext.h>
#include <llvm/IR/Module.h>
#include <llvm/ADT/Triple.h>
#include <llvm/ExecutionEngine/ExecutionEngine.h>
#include <llvm/ExecutionEngine/SectionMemoryManager.h>
#include <llvm/ExecutionEngine/GenericValue.h>
#include <llvm/ExecutionEngine/MCJIT.h>
#include <llvm/Support/TargetSelect.h>
#include <llvm/Support/Signals.h>
#include <llvm/Support/PrettyStackTrace.h>
#include <llvm/Support/Host.h>
#pragma GCC diagnostic pop
#include <libevm/VM.h>
#include "Runtime.h"
#include "Memory.h"
#include "Stack.h"
#include "Type.h"
namespace dev
{
namespace eth
{
namespace jit
{
ExecutionEngine::ExecutionEngine()
{
}
int ExecutionEngine::run(std::unique_ptr<llvm::Module> _module, u256& _gas, ExtVMFace* _ext)
{
auto module = _module.get(); // Keep ownership of the module in _module
llvm::sys::PrintStackTraceOnErrorSignal();
static const auto program = "evmcc";
llvm::PrettyStackTraceProgram X(1, &program);
auto&& context = llvm::getGlobalContext();
llvm::InitializeNativeTarget();
llvm::InitializeNativeTargetAsmPrinter();
llvm::InitializeNativeTargetAsmParser();
std::string errorMsg;
llvm::EngineBuilder builder(module);
//builder.setMArch(MArch);
//builder.setMCPU(MCPU);
//builder.setMAttrs(MAttrs);
//builder.setRelocationModel(RelocModel);
//builder.setCodeModel(CMModel);
builder.setErrorStr(&errorMsg);
builder.setEngineKind(llvm::EngineKind::JIT);
builder.setUseMCJIT(true);
builder.setMCJITMemoryManager(new llvm::SectionMemoryManager());
builder.setOptLevel(llvm::CodeGenOpt::None);
auto triple = llvm::Triple(llvm::sys::getProcessTriple());
if (triple.getOS() == llvm::Triple::OSType::Win32)
triple.setObjectFormat(llvm::Triple::ObjectFormatType::ELF); // MCJIT does not support COFF format
module->setTargetTriple(triple.str());
auto exec = std::unique_ptr<llvm::ExecutionEngine>(builder.create());
if (!exec)
BOOST_THROW_EXCEPTION(Exception() << errinfo_comment(errorMsg));
_module.release(); // Successfully created llvm::ExecutionEngine takes ownership of the module
auto finalizationStartTime = std::chrono::high_resolution_clock::now();
exec->finalizeObject();
auto finalizationEndTime = std::chrono::high_resolution_clock::now();
clog(JIT) << "Module finalization time: "
<< std::chrono::duration_cast<std::chrono::microseconds>(finalizationEndTime - finalizationStartTime).count();
// Create fake ExtVM interface
if (!_ext)
{
_ext = new ExtVMFace;
_ext->myAddress = Address(1122334455667788);
_ext->caller = Address(0xfacefacefaceface);
_ext->origin = Address(101010101010101010);
_ext->value = 0xabcd;
_ext->gasPrice = 1002;
_ext->previousBlock.hash = u256(1003);
_ext->currentBlock.coinbaseAddress = Address(1004);
_ext->currentBlock.timestamp = 1005;
_ext->currentBlock.number = 1006;
_ext->currentBlock.difficulty = 1007;
_ext->currentBlock.gasLimit = 1008;
std::string calldata = "Hello the Beautiful World of Ethereum!";
_ext->data = calldata;
unsigned char fakecode[] = {0x0d, 0x0e, 0x0a, 0x0d, 0x0b, 0x0e, 0xe, 0xf};
_ext->code = decltype(_ext->code)(fakecode, 8);
}
auto entryFunc = module->getFunction("main");
if (!entryFunc)
BOOST_THROW_EXCEPTION(Exception() << errinfo_comment("main function not found"));
ReturnCode returnCode;
std::jmp_buf buf;
Runtime runtime(_gas, *_ext, buf);
auto r = setjmp(buf);
if (r == 0)
{
auto executionStartTime = std::chrono::high_resolution_clock::now();
auto result = exec->runFunction(entryFunc, {{}, llvm::GenericValue(runtime.getDataPtr())});
returnCode = static_cast<ReturnCode>(result.IntVal.getZExtValue());
auto executionEndTime = std::chrono::high_resolution_clock::now();
clog(JIT) << "Execution time : "
<< std::chrono::duration_cast<std::chrono::microseconds>(executionEndTime - executionStartTime).count();
}
else
returnCode = static_cast<ReturnCode>(r);
// Return remaining gas
_gas = returnCode == ReturnCode::OutOfGas ? 0 : runtime.getGas();
clog(JIT) << "Max stack size: " << Stack::maxStackSize;
if (returnCode == ReturnCode::Return)
{
returnData = runtime.getReturnData().toVector(); // TODO: It might be better to place is in Runtime interface
auto&& log = clog(JIT);
log << "RETURN [ ";
for (auto it = returnData.begin(), end = returnData.end(); it != end; ++it)
log << std::hex << std::setw(2) << std::setfill('0') << (int)*it << " ";
log << "]";
}
else
cslog(JIT) << "RETURN " << (int)returnCode;
return static_cast<int>(returnCode);
}
}
}
}