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#ifndef QTMIPSEXCEPTION_H
#define QTMIPSEXCEPTION_H
#include <exception>
#include <qstring.h>
namespace machine {
// Base exception for all machine ones
class QtMipsException : public std::exception {
public:
QtMipsException(QString reason, QString ext, QString file, int line);
const char *what() const throw();
QString msg(bool pos) const;
protected:
QString name, reason, ext, file;
int line;
};
/* This is list of all QtMips specific exceptions
*
* Input:
* Exception durring input loading
* Runtime:
* Exceptions caused by machine invalid input or unsupported action
* UnsupportedInstruction:
* Decoded instruction is not supported.
* This can be cause by really using some unimplemented instruction or because of problems in instruction decode.
* UnsupportedAluOperation:
* Decoded ALU operation is not supported
* This is basically same exception as QtMipsExceptionUnsupportedInstruction but it is emmited from ALU when executed and not before that.
* Overflow:
* Integer operation resulted to overflow (or underflow as we are working with unsigned values)
* This is for sure caused by program it self.
* UnalignedJump:
* Instruction is jumping to unaligned address (ADDR % 4 != 0)
* This can be caused by bug or by user program as it can be jumping relative to register
* This shouldn't be happening with non-register jumps as those should be verified by compiler
* UnknownMemoryControl:
* Used unknown MemoryAccess control value (write_ctl or read_ctl)
* This can be raised by invalid instruction but in such case we shoul raise UnknownInstruction instead
* So this should signal just some QtMips bug.
* OutOfMemoryAccess:
* Trying to access address outside of the memory
* As we are simulating whole 32bit memory address space then this is most probably QtMips bug if raised not program.
* Sanity:
* This is sanity check exception
*/
#define QTMIPS_EXCEPTIONS \
EXCEPTION(Input,) \
EXCEPTION(Runtime,) \
EXCEPTION(UnsupportedInstruction, Runtime) \
EXCEPTION(UnsupportedAluOperation, Runtime) \
EXCEPTION(Overflow, Runtime) \
EXCEPTION(UnalignedJump, Runtime) \
EXCEPTION(UnknownMemoryControl, Runtime) \
EXCEPTION(OutOfMemoryAccess, Runtime) \
EXCEPTION(Sanity,)
#define EXCEPTION(NAME, PARENT) \
class QtMipsException##NAME : public QtMipsException##PARENT { \
public: \
QtMipsException##NAME(QString reason, QString ext, QString file, int line); \
};
QTMIPS_EXCEPTIONS
#undef EXCEPTION
// This is helper macro for throwing QtMips exceptions
#define QTMIPS_EXCEPTION(TYPE, REASON, EXT) (machine::QtMipsException##TYPE (QString(REASON), QString(EXT), QString(__FILE__), __LINE__))
// Sanity comparison potentially throwing QtMipsExceptionSanity
#define SANITY_ASSERT(COND, MSG) do { if (!(COND)) throw QTMIPS_EXCEPTION(Sanity, "Sanity check failed (" #COND ")", MSG); } while (false)
}
#endif // QTMIPSEXCEPTION_H
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