//===- Interpreter.cpp - Top-Level LLVM Interpreter Implementation --------===//
//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
// This file implements the top-level functionality for the LLVM interpreter.
// This interpreter is designed to be a very simple, portable, inefficient
// interpreter.
//===----------------------------------------------------------------------===//
#include "Interpreter.h"
+#include "llvm/CodeGen/IntrinsicLowering.h"
+#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
+#include <cstring>
+using namespace llvm;
+
+namespace {
+
+static struct RegisterInterp {
+ RegisterInterp() { Interpreter::Register(); }
+} InterpRegistrator;
+
+}
+
+extern "C" void LLVMLinkInInterpreter() { }
/// create - Create a new interpreter object. This can never fail.
///
-ExecutionEngine *Interpreter::create(Module *M, bool DebugMode, bool TraceMode){
- bool isLittleEndian;
- switch (M->getEndianness()) {
- case Module::LittleEndian: isLittleEndian = true; break;
- case Module::BigEndian: isLittleEndian = false; break;
- case Module::AnyPointerSize:
- int Test = 0;
- *(char*)&Test = 1; // Return true if the host is little endian
- isLittleEndian = (Test == 1);
- break;
- }
+ExecutionEngine *Interpreter::create(Module *M, std::string* ErrStr) {
+ // Tell this Module to materialize everything and release the GVMaterializer.
+ if (M->MaterializeAllPermanently(ErrStr))
+ // We got an error, just return 0
+ return 0;
- bool isLongPointer;
- switch (M->getPointerSize()) {
- case Module::Pointer32: isLongPointer = false; break;
- case Module::Pointer64: isLongPointer = true; break;
- case Module::AnyPointerSize:
- isLongPointer = (sizeof(void*) == 8); // Follow host
- break;
- }
-
- return new Interpreter(M, isLittleEndian, isLongPointer, DebugMode,TraceMode);
+ return new Interpreter(M);
}
//===----------------------------------------------------------------------===//
// Interpreter ctor - Initialize stuff
//
-Interpreter::Interpreter(Module *M, bool isLittleEndian, bool isLongPointer,
- bool DebugMode, bool TraceMode)
- : ExecutionEngine(M), ExitCode(0), Debug(DebugMode), Trace(TraceMode),
- CurFrame(-1), TD("lli", isLittleEndian, isLongPointer ? 8 : 4,
- isLongPointer ? 8 : 4, isLongPointer ? 8 : 4) {
-
- setTargetData(TD);
+Interpreter::Interpreter(Module *M)
+ : ExecutionEngine(M), TD(M) {
+
+ memset(&ExitValue.Untyped, 0, sizeof(ExitValue.Untyped));
+ setTargetData(&TD);
// Initialize the "backend"
initializeExecutionEngine();
initializeExternalFunctions();
- CW.setModule(M); // Update Writer
emitGlobals();
+
+ IL = new IntrinsicLowering(TD);
}
-/// run - Start execution with the specified function and arguments.
-///
-int Interpreter::run(const std::string &MainFunction,
- const std::vector<std::string> &Args,
- const char ** envp) {
- // Start interpreter into the main function...
- //
- if (!callMainFunction(MainFunction, Args) && !Debug) {
- // If not in debug mode and if the call succeeded, run the code now...
+Interpreter::~Interpreter() {
+ delete IL;
+}
+
+void Interpreter::runAtExitHandlers () {
+ while (!AtExitHandlers.empty()) {
+ callFunction(AtExitHandlers.back(), std::vector<GenericValue>());
+ AtExitHandlers.pop_back();
run();
}
-
- do {
- // If debug mode, allow the user to interact... also, if the user pressed
- // ctrl-c or execution hit an error, enter the event loop...
- if (Debug || isStopped())
- handleUserInput();
-
- // If the program has exited, run atexit handlers...
- if (ECStack.empty() && !AtExitHandlers.empty()) {
- callFunction(AtExitHandlers.back(), std::vector<GenericValue>());
- AtExitHandlers.pop_back();
- run();
- }
- } while (!ECStack.empty());
-
- PerformExitStuff();
- return ExitCode;
}
+/// run - Start execution with the specified function and arguments.
+///
+GenericValue
+Interpreter::runFunction(Function *F,
+ const std::vector<GenericValue> &ArgValues) {
+ assert (F && "Function *F was null at entry to run()");
+
+ // Try extra hard not to pass extra args to a function that isn't
+ // expecting them. C programmers frequently bend the rules and
+ // declare main() with fewer parameters than it actually gets
+ // passed, and the interpreter barfs if you pass a function more
+ // parameters than it is declared to take. This does not attempt to
+ // take into account gratuitous differences in declared types,
+ // though.
+ std::vector<GenericValue> ActualArgs;
+ const unsigned ArgCount = F->getFunctionType()->getNumParams();
+ for (unsigned i = 0; i < ArgCount; ++i)
+ ActualArgs.push_back(ArgValues[i]);
+
+ // Set up the function call.
+ callFunction(F, ActualArgs);
+
+ // Start executing the function.
+ run();
+
+ return ExitValue;
+}