mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-26 21:32:10 +00:00
7a9fd015a3
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8233 91177308-0d34-0410-b5e6-96231b3b80d8
74 lines
3.1 KiB
C++
74 lines
3.1 KiB
C++
//===- SJLJ-Exception.h - SetJmp/LongJmp Exception Handling -----*- C++ -*-===//
|
|
//
|
|
// This file defines the data structures and API used by the Setjmp/Longjmp
|
|
// exception handling runtime library.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef SJLJ_EXCEPTION_H
|
|
#define SJLJ_EXCEPTION_H
|
|
|
|
#include "Exception.h"
|
|
|
|
struct llvm_sjlj_exception {
|
|
// JmpBuffer - This is the buffer which was longjmp'd with.
|
|
//
|
|
void *JmpBuffer;
|
|
|
|
// LongJmpValue - The value passed into longjmp, which the corresponding
|
|
// setjmp should return. Note that this value will never be equal to 0.
|
|
//
|
|
int LongJmpValue;
|
|
|
|
// BaseException - The language independent portion of the exception state.
|
|
// This is at the end of the record so that we can add additional members to
|
|
// this structure without breaking binary compatibility.
|
|
//
|
|
llvm_exception BaseException;
|
|
};
|
|
|
|
extern "C" {
|
|
// __llvm_sjljeh_throw_longjmp - This function creates the longjmp exception
|
|
// and returns. It takes care of mapping the longjmp value from 0 -> 1 as
|
|
// appropriate. The caller should immediately call llvm.unwind after this
|
|
// function call.
|
|
void __llvm_sjljeh_throw_longjmp(void *JmpBuffer, int Val) throw();
|
|
|
|
// __llvm_sjljeh_init_setjmpmap - This funciton initializes the pointer
|
|
// provided to an empty setjmp map, and should be called on entry to a
|
|
// function which calls setjmp.
|
|
void __llvm_sjljeh_init_setjmpmap(void **SetJmpMap) throw();
|
|
|
|
// __llvm_sjljeh_destroy_setjmpmap - This function frees all memory associated
|
|
// with the specified setjmpmap structure. It should be called on all exits
|
|
// (returns or unwinds) from the function which calls ...init_setjmpmap.
|
|
void __llvm_sjljeh_destroy_setjmpmap(void **SetJmpMap) throw();
|
|
|
|
// __llvm_sjljeh_add_setjmp_to_map - This function adds or updates an entry to
|
|
// the map, to indicate which setjmp should be returned to if a longjmp
|
|
// happens.
|
|
void __llvm_sjljeh_add_setjmp_to_map(void **SetJmpMap, void *JmpBuf,
|
|
unsigned SetJmpID) throw();
|
|
|
|
// __llvm_sjljeh_is_longjmp_exception - This function returns true if the
|
|
// current uncaught exception is a longjmp exception. This is the first step
|
|
// of catching a sjlj exception.
|
|
bool __llvm_sjljeh_is_longjmp_exception() throw();
|
|
|
|
// __llvm_sjljeh_get_longjmp_value - This function returns the value that the
|
|
// setjmp call should "return". This requires that the current uncaught
|
|
// exception be a sjlj exception, though it does not require the exception to
|
|
// be caught by this function.
|
|
int __llvm_sjljeh_get_longjmp_value() throw();
|
|
|
|
// __llvm_sjljeh_try_catching_longjmp_exception - This function checks to see
|
|
// if the current uncaught longjmp exception matches any of the setjmps
|
|
// collected in the setjmpmap structure. If so, it catches and destroys the
|
|
// exception, returning the index of the setjmp which caught the exception.
|
|
// If not, it leaves the exception uncaught and returns a value of ~0.
|
|
unsigned __llvm_sjljeh_try_catching_longjmp_exception(void **SetJmpMap)
|
|
throw();
|
|
}
|
|
|
|
#endif
|