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//
// mini-llvm-cpp.cpp: C++ support classes for the mono LLVM integration
//
// (C) 2009 Novell, Inc.
//
//
// We need to override some stuff in LLVM, but this cannot be done using the C
// interface, so we have to use some C++ code here.
// The things which we override are:
// - the default JIT code manager used by LLVM doesn't allocate memory using
// MAP_32BIT, we require it.
// - add some callbacks so we can obtain the size of methods and their exception
// tables.
//
//
// Mono's internal header files are not C++ clean, so avoid including them if
// possible
//
#include <stdint.h>
#include <llvm/PassManager.h>
#include <llvm/ExecutionEngine/ExecutionEngine.h>
#include <llvm/ExecutionEngine/JITMemoryManager.h>
#include <llvm/Target/TargetOptions.h>
#include <llvm/Target/TargetData.h>
#include <llvm/Analysis/Verifier.h>
#include <llvm/Transforms/Scalar.h>
#include <llvm/Support/CommandLine.h>
#include "llvm/Support/PassNameParser.h"
#include <llvm/CodeGen/Passes.h>
#include <llvm/CodeGen/MachineFunctionPass.h>
//#include <llvm/LinkAllPasses.h>
#include "llvm-c/Core.h"
#include "llvm-c/ExecutionEngine.h"
#include "mini-llvm-cpp.h"
using namespace llvm;
class MonoJITMemoryManager : public JITMemoryManager
{
private:
JITMemoryManager *mm;
public:
/* Callbacks installed by mono */
AllocCodeMemoryCb *alloc_cb;
FunctionEmittedCb *emitted_cb;
MonoJITMemoryManager ();
~MonoJITMemoryManager ();
void setMemoryWritable (void);
void setMemoryExecutable (void);
void AllocateGOT();
unsigned char *getGOTBase() const {
return mm->getGOTBase ();
}
void *getDlsymTable() const {
return mm->getDlsymTable ();
}
void SetDlsymTable(void *ptr);
unsigned char *startFunctionBody(const Function *F,
uintptr_t &ActualSize);
unsigned char *allocateStub(const GlobalValue* F, unsigned StubSize,
unsigned Alignment);
void endFunctionBody(const Function *F, unsigned char *FunctionStart,
unsigned char *FunctionEnd);
unsigned char *allocateSpace(intptr_t Size, unsigned Alignment);
void deallocateMemForFunction(const Function *F);
unsigned char*startExceptionTable(const Function* F,
uintptr_t &ActualSize);
void endExceptionTable(const Function *F, unsigned char *TableStart,
unsigned char *TableEnd,
unsigned char* FrameRegister);
};
MonoJITMemoryManager::MonoJITMemoryManager ()
{
SizeRequired = true;
mm = JITMemoryManager::CreateDefaultMemManager ();
}
MonoJITMemoryManager::~MonoJITMemoryManager ()
{
}
void
MonoJITMemoryManager::setMemoryWritable (void)
{
}
void
MonoJITMemoryManager::setMemoryExecutable (void)
{
}
void
MonoJITMemoryManager::AllocateGOT()
{
mm->AllocateGOT ();
}
void
MonoJITMemoryManager::SetDlsymTable(void *ptr)
{
mm->SetDlsymTable (ptr);
}
unsigned char *
MonoJITMemoryManager::startFunctionBody(const Function *F,
uintptr_t &ActualSize)
{
return alloc_cb (wrap (F), ActualSize);
}
unsigned char *
MonoJITMemoryManager::allocateStub(const GlobalValue* F, unsigned StubSize,
unsigned Alignment)
{
return alloc_cb (wrap (F), StubSize);
}
void
MonoJITMemoryManager::endFunctionBody(const Function *F, unsigned char *FunctionStart,
unsigned char *FunctionEnd)
{
emitted_cb (wrap (F), FunctionStart, FunctionEnd);
}
unsigned char *
MonoJITMemoryManager::allocateSpace(intptr_t Size, unsigned Alignment)
{
return new unsigned char [Size];
}
void
MonoJITMemoryManager::deallocateMemForFunction(const Function *F)
{
}
unsigned char*
MonoJITMemoryManager::startExceptionTable(const Function* F,
uintptr_t &ActualSize)
{
return alloc_cb (wrap (F), ActualSize);
}
void
MonoJITMemoryManager::endExceptionTable(const Function *F, unsigned char *TableStart,
unsigned char *TableEnd,
unsigned char* FrameRegister)
{
}
static MonoJITMemoryManager *mono_mm;
static FunctionPassManager *fpm;
void
mono_llvm_optimize_method (LLVMValueRef method)
{
verifyFunction (*(unwrap<Function> (method)));
fpm->run (*unwrap<Function> (method));
}
void
mono_llvm_dump_value (LLVMValueRef value)
{
/* Same as LLVMDumpValue (), but print to stdout */
cout << (*unwrap<Value> (value));
}
/* Missing overload for building an alloca with an alignment */
LLVMValueRef
mono_llvm_build_alloca (LLVMBuilderRef builder, LLVMTypeRef Ty,
LLVMValueRef ArraySize,
int alignment, const char *Name)
{
return wrap (unwrap (builder)->Insert (new AllocaInst(unwrap (Ty), unwrap (ArraySize), alignment), Name));
}
static cl::list<const PassInfo*, bool, PassNameParser>
PassList(cl::desc("Optimizations available:"));
LLVMExecutionEngineRef
mono_llvm_create_ee (LLVMModuleProviderRef MP, AllocCodeMemoryCb *alloc_cb, FunctionEmittedCb *emitted_cb, ExceptionTableCb *exception_cb)
{
std::string Error;
llvm::cl::ParseEnvironmentOptions("mono", "MONO_LLVM", "", false);
mono_mm = new MonoJITMemoryManager ();
mono_mm->alloc_cb = alloc_cb;
mono_mm->emitted_cb = emitted_cb;
ExceptionHandling = true;
ExecutionEngine *EE = ExecutionEngine::createJIT (unwrap (MP), &Error, mono_mm, false);
EE->InstallExceptionTableRegister (exception_cb);
fpm = new FunctionPassManager (unwrap (MP));
fpm->add(new TargetData(*EE->getTargetData()));
/* Add a random set of passes */
/* Make this run-time configurable */
fpm->add(createInstructionCombiningPass());
fpm->add(createReassociatePass());
fpm->add(createGVNPass());
fpm->add(createCFGSimplificationPass());
/* Add passes specified by the env variable */
/* FIXME: This can only add passes which are linked in, thus are already used */
for (unsigned i = 0; i < PassList.size(); ++i) {
const PassInfo *PassInf = PassList[i];
Pass *P = 0;
if (PassInf->getNormalCtor())
P = PassInf->getNormalCtor()();
if (dynamic_cast<MachineFunctionPass*>(P) != 0) {
cerr << PassInf->getPassName () << " is a machine function pass.\n";
} else {
fpm->add (P);
}
}
return wrap(EE);
}
void
mono_llvm_dispose_ee (LLVMExecutionEngineRef ee)
{
delete unwrap (ee);
delete fpm;
}
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