------- Comment #13 from dave at hiauly1 dot hia dot nrc dot ca 2009-12-04
23:45 -------
Subject: Re: FAIL: gnat.dg/null_pointer_deref1.adb
execution test
On Fri, 04 Dec 2009, ebotcazou at gcc dot gnu dot org wrote:
>
>
> ------- Comment #10 from ebotcazou at gcc dot gnu dot org 2009-12-04 09:52
> -------
> > The catch for the first null pointer exception in libjava.lang/Array_3
> > is not caught but I don't know why.
>
> Very likely because of the adjustment made in libjava/pa-signal.h:
>
> #define MAKE_THROW_FRAME(_exception) \
> do \
> { \
> struct ucontext *uc = (struct ucontext *)arg; \
> struct sigcontext *sc = &uc->uc_mcontext; \
> (void)_dummy; \
> (void)_info; \
> /* Advance the program counter so that it is after the start \
> of the instruction: the exception handler expects \
> the PC to point to the instruction after a call. */ \
> sc->sc_iaoq[0] = sc->sc_iaoq[1]; \
> sc->sc_iaoq[1] += 4; \
> } \
> while (0)
>
> That's not true if you set fs->signal_frame to 1 in the fallback routine.
The attached change seems to fix the Array_3 linux fail. Testing a
similar change for hpux. However, need to fix the following warnings:
../../../gcc/libjava/prims.cc:178:1: warning: unused parameter
'_dummy'../../../gcc/libjava/prims.cc:178:1: warning: unused parameter
'_info'../../../gcc/libjava/prims.cc:178:1: warning: unused parameter 'arg'
Dave
------- Comment #14 from dave at hiauly1 dot hia dot nrc dot ca 2009-12-04
23:45 -------
Created an attachment (id=19230)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19230&action=view)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41912
