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90 lines
3.4 KiB
C++
90 lines
3.4 KiB
C++
//===- C++-Exception.h - C++ Specific Exception Handling --------*- C++ -*-===//
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//
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// This file defines the data structures and API used by the C++ exception
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// handling runtime library.
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//
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//===----------------------------------------------------------------------===//
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#ifndef CXX_EXCEPTION_H
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#define CXX_EXCEPTION_H
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#include "Exception.h"
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#include <typeinfo>
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#include <cassert>
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// Assert should only be used for debugging the runtime library. Enabling it in
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// CVS will break some platforms!
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#undef assert
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#define assert(X)
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struct llvm_cxx_exception {
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// TypeInfo - A pointer to the C++ std::type_info object for this exception
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// class. This is required because the class may not be polymorphic.
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//
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const std::type_info *TypeInfo;
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// ExceptionObjectDestructor - A pointer to the function which destroys the
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// object represented by this exception. This is required because the class
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// may not be polymorphic. This may be null if there is no cleanup required.
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//
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void (*ExceptionObjectDestructor)(void *);
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// UnexpectedHandler - This contains a pointer to the "unexpected" handler
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// which may be registered by the user program with set_unexpected. Calls to
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// unexpected which are a result of an exception throw are supposed to use the
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// value of the handler at the time of the throw, not the currently set value.
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//
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void (*UnexpectedHandler)();
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// TerminateHandler - This contains a pointer to the "terminate" handler which
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// may be registered by the user program with set_terminate. Calls to
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// unexpected which are a result of an exception throw are supposed to use the
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// value of the handler at the time of the throw, not the currently set value.
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//
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void (*TerminateHandler)();
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// BaseException - The language independent portion of the exception state.
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// This is at the end of the record so that we can add additional members to
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// this structure without breaking binary compatibility.
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//
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llvm_exception BaseException;
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};
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inline llvm_cxx_exception *get_cxx_exception(llvm_exception *E) throw() {
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assert(E->ExceptionType == CXXException && "Not a C++ exception?");
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return (llvm_cxx_exception*)(E+1)-1;
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}
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// Interface to the C++ standard library to get to the terminate and unexpected
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// handler stuff.
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namespace __cxxabiv1 {
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// Invokes given handler, dying appropriately if the user handler was
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// so inconsiderate as to return.
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extern void __terminate(std::terminate_handler) throw() __attribute__((noreturn));
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extern void __unexpected(std::unexpected_handler) __attribute__((noreturn));
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// The current installed user handlers.
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extern std::terminate_handler __terminate_handler;
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extern std::unexpected_handler __unexpected_handler;
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}
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extern "C" {
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void *__llvm_cxxeh_allocate_exception(unsigned NumBytes) throw();
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void __llvm_cxxeh_free_exception(void *ObjectPtr) throw();
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void __llvm_cxxeh_throw(void *ObjectPtr, void *TypeInfoPtr,
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void (*DtorPtr)(void*)) throw();
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void __llvm_cxxeh_call_terminate() throw() __attribute__((noreturn));
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void * __llvm_cxxeh_current_uncaught_exception_isa(void *Ty)
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throw();
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void *__llvm_cxxeh_begin_catch() throw();
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void *__llvm_cxxeh_begin_catch_if_isa(void *CatchType) throw();
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void __llvm_cxxeh_end_catch(void *Exception) /* might throw */;
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void __llvm_cxxeh_rethrow() throw();
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void *__llvm_cxxeh_get_last_caught() throw();
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void __llvm_cxxeh_check_eh_spec(void *Info, ...);
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}
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#endif
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