mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-24 03:39:02 +08:00
c9bffcd53e
2001-05-29 Andrew Haley <aph@redhat.com>
* include/i386-signal.h (MAKE_THROW_FRAME): Don't fix up frame
pointer: the dwarf unwinder in libgcc will do everything that's
needed.
(HANDLE_DIVIDE_OVERFLOW): Tidy. Don't mess with stack frames any
more than we absolutely need to.
* configure.host (EXCEPTIONSPEC): Remove libgcj_sjlj on Alpha.
* configure.in (SIGNAL_HANDLER): Use include/dwarf2-signal.h on
Alpha.
(SIGNAL_HANDLER): Test "$enable_sjlj_exceptions", not
"$libgcj_sjlj".
* configure: Rebuilt.
* include/dwarf2-signal.h (MAKE_THROW_FRAME): Adjust PC
for Alpha.
(SIGNAL_HANDLER): Use siginfo style handler.
(INIT_SEGV): Likewise.
(INIT_FPE): Likewise.
* include/ppc-signal.h: Delete whole file.
From-SVN: r42691
86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
// dwarf2-signal.h - Catch runtime signals and turn them into exceptions.
|
|
|
|
/* Copyright (C) 2000, 2001 Free Software Foundation
|
|
|
|
This file is part of libgcj.
|
|
|
|
Use this file for a target for which the dwarf2 unwinder in libgcc
|
|
can unwind through signal handlers.
|
|
|
|
This software is copyrighted work licensed under the terms of the
|
|
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
|
|
details. */
|
|
|
|
#ifndef JAVA_SIGNAL_H
|
|
#define JAVA_SIGNAL_H 1
|
|
|
|
#include <signal.h>
|
|
#include <sys/syscall.h>
|
|
|
|
#define HANDLE_SEGV 1
|
|
#undef HANDLE_FPE
|
|
|
|
#define SIGNAL_HANDLER(_name) \
|
|
static void _Jv_##_name (int, siginfo_t *, void *_p)
|
|
|
|
class java::lang::Throwable;
|
|
|
|
// Unwind the stack to the point at which the signal was generated and
|
|
// then throw an exception. With the dwarf2 unwinder we don't usually
|
|
// need to do anything, with some minor exceptions.
|
|
|
|
#ifdef __alpha__
|
|
#define MAKE_THROW_FRAME(_exception) \
|
|
do \
|
|
{ \
|
|
/* Alpha either leaves PC pointing at a faulting instruction or the \
|
|
following instruction, depending on the signal. SEGV always does \
|
|
the former, so we adjust the saved PC to point to the following \
|
|
instruction; this is what the handler in libgcc expects. */ \
|
|
struct sigcontext *_sc = (struct sigcontext *)_p; \
|
|
_sc->sc_pc += 4; \
|
|
} \
|
|
while (0)
|
|
#else
|
|
#define MAKE_THROW_FRAME(_exception) \
|
|
do \
|
|
{ \
|
|
(void)_p; \
|
|
} \
|
|
while (0)
|
|
#endif
|
|
|
|
#define INIT_SEGV \
|
|
do \
|
|
{ \
|
|
nullp = new java::lang::NullPointerException (); \
|
|
struct sigaction act; \
|
|
act.sa_sigaction = _Jv_catch_segv; \
|
|
sigemptyset (&act.sa_mask); \
|
|
act.sa_flags = SA_SIGINFO; \
|
|
syscall (SYS_sigaction, SIGSEGV, &act, NULL); \
|
|
} \
|
|
while (0)
|
|
|
|
#define INIT_FPE \
|
|
do \
|
|
{ \
|
|
arithexception = new java::lang::ArithmeticException \
|
|
(JvNewStringLatin1 ("/ by zero")); \
|
|
struct sigaction act; \
|
|
act.sa_sigaction = _Jv_catch_fpe; \
|
|
sigemptyset (&act.sa_mask); \
|
|
act.sa_flags = SA_SIGINFO; \
|
|
syscall (SYS_sigaction, SIGFPE, &act, NULL); \
|
|
} \
|
|
while (0)
|
|
|
|
/* We use syscall(SYS_sigaction) in INIT_SEGV and INIT_FPE instead of
|
|
* sigaction() because on some systems the pthreads wrappers for
|
|
* signal handlers are not compiled with unwind information, so it's
|
|
* not possible to unwind through them. This is a problem that will
|
|
* go away once all systems have pthreads libraries that are
|
|
* compiled with full unwind info. */
|
|
|
|
#endif /* JAVA_SIGNAL_H */
|