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b40d5e7d94
* Make catch_begin() produce a pointer that must be passed to catch_end() * Eliminate the caught exception stack. * Add optional debugging code that may be turned on. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8184 91177308-0d34-0410-b5e6-96231b3b80d8
58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
//===- exception.h - Generic language-independent exceptions ----*- C++ -*-===//
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//
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// This file defines the the shared data structures used by all language
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// specific exception handling runtime libraries.
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//
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//===----------------------------------------------------------------------===//
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#ifndef EXCEPTION_H
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#define EXCEPTION_H
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struct llvm_exception {
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// ExceptionDestructor - This call-back function is used to destroy the
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// current exception, without requiring the caller to know what the concrete
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// exception type is.
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//
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void (*ExceptionDestructor)(llvm_exception *);
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// ExceptionType - This field identifies what runtime library this exception
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// came from. Currently defined values are:
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// 0 - Error
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// 1 - longjmp exception (see longjmp-exception.c)
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// 2 - C++ exception (see c++-exception.c)
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//
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unsigned ExceptionType;
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// Next - This points to the next exception in the current stack.
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llvm_exception *Next;
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// HandlerCount - This is a count of the number of handlers which have
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// currently caught this exception. If the handler is caught and this number
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// falls to zero, the exception is destroyed.
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//
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unsigned HandlerCount;
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// isRethrown - This field is set on an exception if it has been 'throw;'n.
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// This is needed because the exception might exit through a number of the
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// end_catch statements matching the number of begin_catch statements that
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// have been processed. When this happens, the exception should become
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// uncaught, not dead.
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//
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int isRethrown;
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};
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enum {
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ErrorException = 0,
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LongjmpException = 1,
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CXXException = 2,
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};
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// Language independent exception handling API...
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//
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extern "C" {
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bool __llvm_eh_has_uncaught_exception() throw();
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void *__llvm_eh_current_uncaught_exception_type(unsigned HandlerType) throw();
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}
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#endif
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