llvm-6502/runtime/GCCLibraries/crtend/Exception.cpp
Reid Spencer 8b2e1419cf Undo removal of the runtime libraries. While this may have been a bit
premature, these libraries will be going away for the 2.0 release. Other
arrangements for profiling, gc, etc. should be made in the next few months.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31807 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-17 03:32:33 +00:00

55 lines
1.9 KiB
C++

//===- Exception.cpp - Generic language-independent exceptions ------------===//
//
// This file defines the the shared data structures used by all language
// specific exception handling runtime libraries.
//
//===----------------------------------------------------------------------===//
#include "Exception.h"
// Thread local state for exception handling. FIXME: This should really be made
// thread-local!
// UncaughtExceptionStack - The stack of exceptions currently being thrown.
static llvm_exception *UncaughtExceptionStack = 0;
// __llvm_eh_has_uncaught_exception - This is used to implement
// std::uncaught_exception.
//
bool __llvm_eh_has_uncaught_exception() throw() {
return UncaughtExceptionStack != 0;
}
// __llvm_eh_current_uncaught_exception - This function checks to see if the
// current uncaught exception is of the specified language type. If so, it
// returns a pointer to the exception area data.
//
void *__llvm_eh_current_uncaught_exception_type(unsigned HandlerType) throw() {
if (UncaughtExceptionStack->ExceptionType == HandlerType)
return UncaughtExceptionStack+1;
return 0;
}
// __llvm_eh_add_uncaught_exception - This adds the specified exception to the
// top of the uncaught exception stack. The exception should not already be on
// the stack!
void __llvm_eh_add_uncaught_exception(llvm_exception *E) throw() {
E->Next = UncaughtExceptionStack;
UncaughtExceptionStack = E;
}
// __llvm_eh_get_uncaught_exception - Returns the current uncaught exception.
// There must be an uncaught exception for this to work!
llvm_exception *__llvm_eh_get_uncaught_exception() throw() {
return UncaughtExceptionStack;
}
// __llvm_eh_pop_from_uncaught_stack - Remove the current uncaught exception
// from the top of the stack.
llvm_exception *__llvm_eh_pop_from_uncaught_stack() throw() {
llvm_exception *E = __llvm_eh_get_uncaught_exception();
UncaughtExceptionStack = E->Next;
return E;
}