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The interpreter assumes that the caller of runFunction() must be lli, and

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therefore the function being called must be a main() returning an int.  The
consequences when these assumptions are false are not good, so don't assume
them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26031 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jeff Cohen 2006-02-07 05:29:44 +00:00
parent 68835dd511
commit 8c9191c644
3 changed files with 7 additions and 8 deletions
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6
lib/ExecutionEngine/Interpreter/Execution.cpp
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@ -553,7 +553,7 @@ void Interpreter::exitCalled(GenericValue GV) {
/// Pop the last stack frame off of ECStack and then copy the result
/// back into the result variable if we are not returning void. The
/// result variable may be the ExitCode, or the Value of the calling
/// result variable may be the ExitValue, or the Value of the calling
/// CallInst if there was a previous stack frame. This method may
/// invalidate any ECStack iterators you have. This method also takes
/// care of switching to the normal destination BB, if we are returning
@ -566,9 +566,9 @@ void Interpreter::popStackAndReturnValueToCaller (const Type *RetTy,
if (ECStack.empty()) { // Finished main. Put result into exit code...
if (RetTy && RetTy->isIntegral()) { // Nonvoid return type?
ExitCode = Result.IntVal; // Capture the exit code of the program
ExitValue = Result; // Capture the exit value of the program
} else {
ExitCode = 0;
memset(&ExitValue, 0, sizeof(ExitValue));
}
} else {
// If we have a previous stack frame, and we have a previous call,

7
lib/ExecutionEngine/Interpreter/Interpreter.cpp
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@ -50,10 +50,11 @@ ExecutionEngine *Interpreter::create(Module *M, IntrinsicLowering *IL) {
//
Interpreter::Interpreter(Module *M, bool isLittleEndian, bool isLongPointer,
IntrinsicLowering *il)
: ExecutionEngine(M), ExitCode(0),
: ExecutionEngine(M),
TD("lli", isLittleEndian, isLongPointer ? 8 : 4, isLongPointer ? 8 : 4,
isLongPointer ? 8 : 4), IL(il) {
memset(&ExitValue, 0, sizeof(ExitValue));
setTargetData(TD);
// Initialize the "backend"
initializeExecutionEngine();
@ -100,8 +101,6 @@ Interpreter::runFunction(Function *F,
// Start executing the function.
run();
GenericValue rv;
rv.IntVal = ExitCode;
return rv;
return ExitValue;
}

2
lib/ExecutionEngine/Interpreter/Interpreter.h
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@ -80,7 +80,7 @@ struct ExecutionContext {
// Interpreter - This class represents the entirety of the interpreter.
//
class Interpreter : public ExecutionEngine, public InstVisitor<Interpreter> {
int ExitCode; // The exit code to be returned by the lli util
GenericValue ExitValue; // The return value of the called function
TargetData TD;
IntrinsicLowering *IL;