| //===- Exception.h - Generic language-independent exceptions ----*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file was developed by the LLVM research group and is distributed under |
| // the University of Illinois Open Source License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the the shared data structures used by all language |
| // specific exception handling runtime libraries. |
| // |
| // NOTE NOTE NOTE: A copy of this file lives in llvmgcc/libstdc++-v3/libsupc++/ |
| // Any modifications to this file must keep it in sync! |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef EXCEPTION_H |
| #define EXCEPTION_H |
| |
| struct llvm_exception { |
| // ExceptionDestructor - This call-back function is used to destroy the |
| // current exception, without requiring the caller to know what the concrete |
| // exception type is. |
| // |
| void (*ExceptionDestructor)(llvm_exception *); |
| |
| // ExceptionType - This field identifies what runtime library this exception |
| // came from. Currently defined values are: |
| // 0 - Error |
| // 1 - longjmp exception (see longjmp-exception.c) |
| // 2 - C++ exception (see c++-exception.c) |
| // |
| unsigned ExceptionType; |
| |
| // Next - This points to the next exception in the current stack. |
| llvm_exception *Next; |
| |
| // HandlerCount - This is a count of the number of handlers which have |
| // currently caught this exception. If the handler is caught and this number |
| // falls to zero, the exception is destroyed. |
| // |
| unsigned HandlerCount; |
| |
| // isRethrown - This field is set on an exception if it has been 'throw;'n. |
| // This is needed because the exception might exit through a number of the |
| // end_catch statements matching the number of begin_catch statements that |
| // have been processed. When this happens, the exception should become |
| // uncaught, not dead. |
| // |
| int isRethrown; |
| }; |
| |
| enum { |
| ErrorException = 0, |
| SJLJException = 1, |
| CXXException = 2 |
| }; |
| |
| // Language independent exception handling API... |
| // |
| extern "C" { |
| bool __llvm_eh_has_uncaught_exception() throw(); |
| void *__llvm_eh_current_uncaught_exception_type(unsigned HandlerType) throw(); |
| void __llvm_eh_add_uncaught_exception(llvm_exception *E) throw(); |
| |
| llvm_exception *__llvm_eh_get_uncaught_exception() throw(); |
| llvm_exception *__llvm_eh_pop_from_uncaught_stack() throw(); |
| } |
| |
| #endif |