//
// When _Unwind_RaiseException() is in phase2, it hands control
// to the personality function at each frame. The personality
// may force a jump to a landing pad in that function, the landing
// pad code may then call _Unwind_Resume() to continue with the
// unwinding. Note: the call to _Unwind_Resume() is from compiler
// geneated user code. All other _Unwind_* routines are called
// by the C++ runtime __cxa_* routines.
//
// Re-throwing an exception is implemented by having the code call
// __cxa_rethrow() which in turn calls _Unwind_Resume_or_Rethrow()
//
EXPORT void _Unwind_SjLj_Resume(struct _Unwind_Exception* exception_object)
{
DEBUG_PRINT_API("_Unwind_SjLj_Resume(ex_obj=%p)\n", exception_object);
if ( exception_object->private_1 != 0 )
unwind_phase2_forced(exception_object, (_Unwind_Stop_Fn)exception_object->private_1, (void*)exception_object->private_2);
else
unwind_phase2(exception_object);
// clients assume _Unwind_Resume() does not return, so all we can do is abort.
ABORT("_Unwind_SjLj_Resume() can't return");
}
//
// Not used by C++.
// Unwinds stack, calling "stop" function at each frame
// Could be used to implement longjmp().
//
EXPORT _Unwind_Reason_Code _Unwind_ForcedUnwind(struct _Unwind_Exception* exception_object, _Unwind_Stop_Fn stop, void* stop_parameter)
{
DEBUG_PRINT_API("_Unwind_ForcedUnwind(ex_obj=%p, stop=%p)\n", exception_object, stop);
unw_context_t uc;
unw_getcontext(&uc);
// mark that this is a forced unwind, so _Unwind_Resume() can do the right thing
exception_object->private_1 = (uintptr_t)stop;
exception_object->private_2 = (uintptr_t)stop_parameter;
// doit
return unwind_phase2_forced(&uc, exception_object, stop, stop_parameter);
}
/// When _Unwind_RaiseException() is in phase2, it hands control
/// to the personality function at each frame. The personality
/// may force a jump to a landing pad in that function, the landing
/// pad code may then call _Unwind_Resume() to continue with the
/// unwinding. Note: the call to _Unwind_Resume() is from compiler
/// geneated user code. All other _Unwind_* routines are called
/// by the C++ runtime __cxa_* routines.
///
/// Note: re-throwing an exception (as opposed to continuing the unwind)
/// is implemented by having the code call __cxa_rethrow() which
/// in turn calls _Unwind_Resume_or_Rethrow().
_LIBUNWIND_EXPORT void
_Unwind_Resume(_Unwind_Exception *exception_object) {
_LIBUNWIND_TRACE_API("_Unwind_Resume(ex_obj=%p)\n", exception_object);
unw_context_t uc;
unw_getcontext(&uc);
if (exception_object->private_1 != 0)
unwind_phase2_forced(&uc, exception_object,
(_Unwind_Stop_Fn) exception_object->private_1,
(void *)exception_object->private_2);
else
unwind_phase2(&uc, exception_object);
// Clients assume _Unwind_Resume() does not return, so all we can do is abort.
_LIBUNWIND_ABORT("_Unwind_Resume() can't return");
}
/// Not used by C++.
/// Unwinds stack, calling "stop" function at each frame.
/// Could be used to implement longjmp().
_LIBUNWIND_EXPORT _Unwind_Reason_Code
_Unwind_ForcedUnwind(_Unwind_Exception *exception_object,
_Unwind_Stop_Fn stop, void *stop_parameter) {
_LIBUNWIND_TRACE_API("_Unwind_ForcedUnwind(ex_obj=%p, stop=%p)\n",
(void *)exception_object, (void *)(uintptr_t)stop);
unw_context_t uc;
unw_getcontext(&uc);
// Mark that this is a forced unwind, so _Unwind_Resume() can do
// the right thing.
exception_object->private_1 = (uintptr_t) stop;
exception_object->private_2 = (uintptr_t) stop_parameter;
// do it
return unwind_phase2_forced(&uc, exception_object, stop, stop_parameter);
}
/// When _Unwind_RaiseException() is in phase2, it hands control
/// to the personality function at each frame. The personality
/// may force a jump to a landing pad in that function, the landing
/// pad code may then call _Unwind_Resume() to continue with the
/// unwinding. Note: the call to _Unwind_Resume() is from compiler
/// geneated user code. All other _Unwind_* routines are called
/// by the C++ runtime __cxa_* routines.
///
/// Note: re-throwing an exception (as opposed to continuing the unwind)
/// is implemented by having the code call __cxa_rethrow() which
/// in turn calls _Unwind_Resume_or_Rethrow().
_LIBUNWIND_EXPORT void
_Unwind_Resume(struct _Unwind_Exception *exception_object) {
_LIBUNWIND_TRACE_API("_Unwind_Resume(ex_obj=%p)\n", exception_object);
unw_context_t uc;
unw_getcontext(&uc);
#ifdef __arm__
// TODO(piman): Do we need a "force unwind" mechanism?
#else
if (exception_object->private_1 != 0)
unwind_phase2_forced(&uc, exception_object,
(_Unwind_Stop_Fn) exception_object->private_1,
(void *)exception_object->private_2);
else
#endif
unwind_phase2(&uc, exception_object, true);
// Clients assume _Unwind_Resume() does not return, so all we can do is abort.
_LIBUNWIND_ABORT("_Unwind_Resume() can't return");
}
