Initial checking of C++ exception handling library
llvm-svn: 8146
diff --git a/llvm/runtime/GCCLibraries/crtend/Exception.h b/llvm/runtime/GCCLibraries/crtend/Exception.h
new file mode 100644
index 0000000..a0357b5
--- /dev/null
+++ b/llvm/runtime/GCCLibraries/crtend/Exception.h
@@ -0,0 +1,49 @@
+//===- exception.h - Generic language-independent exceptions ----*- C++ -*-===//
+//
+// This file defines the the shared data structures used by all language
+// specific exception handling runtime libraries.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef EXCEPTION_H
+#define EXCEPTION_H
+
+typedef 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)(struct 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.
+ struct 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;
+} llvm_exception;
+
+enum {
+ ErrorException = 0,
+ LongjmpException = 1,
+ CXXException = 2,
+};
+
+// Language independent exception handling API...
+//
+extern "C" {
+ bool __llvm_eh_has_uncaught_exception(void);
+ void *__llvm_eh_current_uncaught_exception_type(unsigned HandlerType);
+}
+
+#endif