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...as you pointed out, is that your personality > function is not called at all. > Even if you did nothing in the personality function, associated with the > setup caused by > llvm.eh.selector, but returned _URC_CONTINUE_UNWIND (8), it should still > be called. this is not correct. Unwind_RaiseException will just exit without unwinding the stack if all personality functions return _URC_CONTINUE_UNWIND. Ciao, Duncan.

Hi Talin, if you change @throwSomething so that it prints a message if the _Unwind_RaiseException call returns, then you will see that it does in fact return. define internal fastcc void @throwSomething() { entry: %throwable = malloc %Throwable call fastcc void @Throwable.construct(%Throwable* %throwable) %unwindInfo = getelementptr %Throwable* %throwable, i32 0, i32...

Duncan Sands wrote: > Hi Talin, > >> So I tried what you suggested, and it just gives me a bus error: >> >> %eh_select34 = call i32 (i8*, i8*, ...)* >> @llvm.eh.selector.i32 ( >> i8* %eh_ptr, >> i8* bitcast (i32 (i32, i32, i64, i8*, %UnwindContext*)* >> @__gcc_personality_v0 to i8*), >>

...as you pointed out, is that your personality function is not called at all. >> Even if you did nothing in the personality function, associated with the setup caused by >> llvm.eh.selector, but returned _URC_CONTINUE_UNWIND (8), it should still be called. > > this is not correct. Unwind_RaiseException will just exit without unwinding > the stack if all personality functions return _URC_CONTINUE_UNWIND. > > Ciao, > > Duncan.

Well, after much labor, I think I have managed to create a personality function that works. But I must say it is frightening how complicated all of this stuff is. -- Talin Duncan Sands wrote: > Hi Talin, if you change @throwSomething so that it prints a message > if the _Unwind_RaiseException call returns, then you will see that > it does in fact return. > > define internal fastcc void @throwSomething() { > entry: > %throwable = malloc %Throwable > call fastcc void @Throwable.construct(%Throwable* %throwable) > %unwindInfo = getelementptr...

...n the personality function, associated with the setup caused by llvm.eh.selector, but returned _URC_CONTINUE_UNWIND (8), it should still be called. Your results are acting like either dwarf exception header info is not emitted (llvm::DwarfExceptionHandling = true; not executed could affect this), _Unwind_RaiseException(...) is not being called, or the default or another personality function (_gcc_personality_v0(...)) is called instead by the unwind infrastructure. Although you implied you dumped the exception headers and found your personality function, I can if you wish instead given you breaks for gbd so yo...