/// deleteModuleProvider - Remove a ModuleProvider from the list of modules,
/// and deletes the ModuleProvider and owned Module. Avoids materializing
/// the underlying module.
void ExecutionEngine::deleteModuleProvider(ModuleProvider *P,
std::string *ErrInfo) {
for(SmallVector<ModuleProvider *, 1>::iterator I = Modules.begin(),
E = Modules.end(); I != E; ++I) {
ModuleProvider *MP = *I;
if (MP == P) {
Modules.erase(I);
clearGlobalMappingsFromModule(MP->getModule());
delete MP;
return;
}
}
}
/// removeModuleProvider - Remove a ModuleProvider from the list of modules.
/// Relases the Module from the ModuleProvider, materializing it in the
/// process, and returns the materialized Module.
Module* ExecutionEngine::removeModuleProvider(ModuleProvider *P,
std::string *ErrInfo) {
for(SmallVector<ModuleProvider *, 1>::iterator I = Modules.begin(),
E = Modules.end(); I != E; ++I) {
ModuleProvider *MP = *I;
if (MP == P) {
Modules.erase(I);
clearGlobalMappingsFromModule(MP->getModule());
return MP->releaseModule(ErrInfo);
}
}
return NULL;
}
/// getPointerToFunction - This method is used to get the address of the
/// specified function, compiling it if neccesary.
///
void *JIT::getPointerToFunction(Function *F) {
if (void *Addr = getPointerToGlobalIfAvailable(F))
return Addr; // Check if function already code gen'd
MutexGuard locked(lock);
// Now that this thread owns the lock, check if another thread has already
// code gen'd the function.
if (void *Addr = getPointerToGlobalIfAvailable(F))
return Addr;
// Make sure we read in the function if it exists in this Module.
if (F->hasNotBeenReadFromBitcode()) {
// Determine the module provider this function is provided by.
Module *M = F->getParent();
ModuleProvider *MP = 0;
for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
if (Modules[i]->getModule() == M) {
MP = Modules[i];
break;
}
}
assert(MP && "Function isn't in a module we know about!");
std::string ErrorMsg;
if (MP->materializeFunction(F, &ErrorMsg)) {
llvm_report_error("Error reading function '" + F->getName()+
"' from bitcode file: " + ErrorMsg);
}
// Now retry to get the address.
if (void *Addr = getPointerToGlobalIfAvailable(F))
return Addr;
}
if (F->isDeclaration() || F->hasAvailableExternallyLinkage()) {
bool AbortOnFailure = !F->hasExternalWeakLinkage();
void *Addr = getPointerToNamedFunction(F->getName(), AbortOnFailure);
addGlobalMapping(F, Addr);
return Addr;
}
runJITOnFunctionUnlocked(F, locked);
void *Addr = getPointerToGlobalIfAvailable(F);
assert(Addr && "Code generation didn't add function to GlobalAddress table!");
return Addr;
}
/**
* Find the module provider for a given filename or return NULL if
* no module provider can be found.
*/
ModuleProvider* Host::FindModuleProvider(std::string& filename)
{
Poco::Mutex::ScopedLock lock(moduleMutex);
std::vector<ModuleProvider*>::iterator iter;
for (iter = moduleProviders.begin(); iter != moduleProviders.end(); iter++)
{
ModuleProvider *provider = (*iter);
if (provider && provider->IsModule(filename))
{
return provider;
}
}
return 0;
}
/// getPointerToFunction - This method is used to get the address of the
/// specified function, compiling it if neccesary.
///
void *JIT::getPointerToFunction(Function *F) {
if (void *Addr = getPointerToGlobalIfAvailable(F))
return Addr; // Check if function already code gen'd
// Make sure we read in the function if it exists in this Module.
if (F->hasNotBeenReadFromBitcode()) {
// Determine the module provider this function is provided by.
Module *M = F->getParent();
ModuleProvider *MP = 0;
for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
if (Modules[i]->getModule() == M) {
MP = Modules[i];
break;
}
}
assert(MP && "Function isn't in a module we know about!");
std::string ErrorMsg;
if (MP->materializeFunction(F, &ErrorMsg)) {
cerr << "Error reading function '" << F->getName()
<< "' from bitcode file: " << ErrorMsg << "\n";
abort();
}
}
if (void *Addr = getPointerToGlobalIfAvailable(F)) {
return Addr;
}
MutexGuard locked(lock);
if (F->isDeclaration()) {
void *Addr = getPointerToNamedFunction(F->getName());
addGlobalMapping(F, Addr);
return Addr;
}
runJITOnFunction(F);
void *Addr = getPointerToGlobalIfAvailable(F);
assert(Addr && "Code generation didn't add function to GlobalAddress table!");
return Addr;
}
//===----------------------------------------------------------------------===//
// main Driver function
//
int main(int argc, char **argv, char * const *envp) {
sys::PrintStackTraceOnErrorSignal();
PrettyStackTraceProgram X(argc, argv);
atexit(do_shutdown); // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv,
"llvm interpreter & dynamic compiler\n");
// If the user doesn't want core files, disable them.
if (DisableCoreFiles)
sys::Process::PreventCoreFiles();
// Load the bitcode...
std::string ErrorMsg;
ModuleProvider *MP = NULL;
if (MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFile,&ErrorMsg)) {
MP = getBitcodeModuleProvider(Buffer, &ErrorMsg);
if (!MP) delete Buffer;
}
if (!MP) {
std::cerr << argv[0] << ": error loading program '" << InputFile << "': "
<< ErrorMsg << "\n";
exit(1);
}
// Get the module as the MP could go away once EE takes over.
Module *Mod = NoLazyCompilation
? MP->materializeModule(&ErrorMsg) : MP->getModule();
if (!Mod) {
std::cerr << argv[0] << ": bitcode didn't read correctly.\n";
std::cerr << "Reason: " << ErrorMsg << "\n";
exit(1);
}
// If we are supposed to override the target triple, do so now.
if (!TargetTriple.empty())
Mod->setTargetTriple(TargetTriple);
EE = ExecutionEngine::create(MP, ForceInterpreter, &ErrorMsg, Fast);
if (!EE && !ErrorMsg.empty()) {
std::cerr << argv[0] << ":error creating EE: " << ErrorMsg << "\n";
exit(1);
}
if (NoLazyCompilation)
EE->DisableLazyCompilation();
// If the user specifically requested an argv[0] to pass into the program,
// do it now.
if (!FakeArgv0.empty()) {
InputFile = FakeArgv0;
} else {
// Otherwise, if there is a .bc suffix on the executable strip it off, it
// might confuse the program.
if (InputFile.rfind(".bc") == InputFile.length() - 3)
InputFile.erase(InputFile.length() - 3);
}
// Add the module's name to the start of the vector of arguments to main().
InputArgv.insert(InputArgv.begin(), InputFile);
// Call the main function from M as if its signature were:
// int main (int argc, char **argv, const char **envp)
// using the contents of Args to determine argc & argv, and the contents of
// EnvVars to determine envp.
//
Function *EntryFn = Mod->getFunction(EntryFunc);
if (!EntryFn) {
std::cerr << '\'' << EntryFunc << "\' function not found in module.\n";
return -1;
}
// If the program doesn't explicitly call exit, we will need the Exit
// function later on to make an explicit call, so get the function now.
Constant *Exit = Mod->getOrInsertFunction("exit", Type::VoidTy,
Type::Int32Ty, NULL);
// Reset errno to zero on entry to main.
errno = 0;
// Run static constructors.
EE->runStaticConstructorsDestructors(false);
if (NoLazyCompilation) {
for (Module::iterator I = Mod->begin(), E = Mod->end(); I != E; ++I) {
Function *Fn = &*I;
if (Fn != EntryFn && !Fn->isDeclaration())
EE->getPointerToFunction(Fn);
}
}
// Run main.
int Result = EE->runFunctionAsMain(EntryFn, InputArgv, envp);
// Run static destructors.
EE->runStaticConstructorsDestructors(true);
// If the program didn't call exit explicitly, we should call it now.
// This ensures that any atexit handlers get called correctly.
if (Function *ExitF = dyn_cast<Function>(Exit)) {
std::vector<GenericValue> Args;
GenericValue ResultGV;
ResultGV.IntVal = APInt(32, Result);
Args.push_back(ResultGV);
EE->runFunction(ExitF, Args);
std::cerr << "ERROR: exit(" << Result << ") returned!\n";
abort();
} else {
std::cerr << "ERROR: exit defined with wrong prototype!\n";
abort();
}
}
