Enable DWARF2 exceptions on PPC

Mon May 21 09:32:00 GMT 2001

Use the new DWARF2 exceptions on PPC. With this I get 0 failures on
the libgcj testsuite.
Added to the trunk and the branch.
Andrew.
2001年05月18日 Andrew Haley <aph@cambridge.redhat.com>
	* include/dwarf2-signal.h: New file.	
	* configure.in (SYSDEP_SOURCES): Add dwarf2-signal.h for PPC.
	* configure.host (EXCEPTIONSPEC): Don't use sjlj on PPC.
 * configure: Rebuilt.
Index: include/dwarf2-signal.h
===================================================================
RCS file: dwarf2-signal.h
diff -N dwarf2-signal.h
*** /dev/null	Tue May 5 13:32:27 1998
--- dwarf2-signal.h	Mon May 21 09:23:37 2001
***************
*** 0 ****
--- 1,72 ----
+ // dwarf2-signal.h - Catch runtime signals and turn them into exceptions.
+ 
+ /* Copyright (C) 2000 Free Software Foundation
+ 
+ This file is part of libgcj.
+ 
+ Use this file for every target for which the dwarf2 unwinder in
+ libgcc can unwind through signal handlers and no special actions
+ are needed.
+ 
+ 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)
+ 
+ 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 need to
+ // do anything.
+ 
+ #define MAKE_THROW_FRAME(_exception)		\
+ do						\
+ {						\
+ }						\
+ while (0)
+ 
+ 
+ #define INIT_SEGV						\
+ do								\
+ {								\
+ nullp = new java::lang::NullPointerException (); 	\
+ struct sigaction act;					\
+ act.sa_handler = _Jv_catch_segv;				\
+ sigemptyset (&act.sa_mask);					\
+ act.sa_flags = 0;						\
+ 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_handler = _Jv_catch_fpe;				\
+ sigemptyset (&act.sa_mask);					\
+ act.sa_flags = 0;						\
+ 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 */
Index: configure.in
===================================================================
RCS file: /cvs/gcc/gcc/libjava/configure.in,v
retrieving revision 1.73.2.7
diff -c -2 -p -r1.73.2.7 configure.in
*** configure.in	2001年05月14日 17:45:15	1.73.2.7
--- configure.in	2001年05月21日 16:24:46
*************** case "${host}" in
*** 746,749 ****
--- 746,752 ----
 # test -d sysdep || mkdir sysdep
 # ;;
+ powerpc-*-linux*)
+ SIGNAL_HANDLER=include/dwarf2-signal.h
+ ;;
 *)
 SIGNAL_HANDLER=include/default-signal.h
Index: configure.host
===================================================================
RCS file: /cvs/gcc/gcc/libjava/configure.host,v
retrieving revision 1.15.2.3
diff -c -2 -p -r1.15.2.3 configure.host
*** configure.host	2001年05月14日 17:45:15	1.15.2.3
--- configure.host	2001年05月21日 16:24:46
*************** case "${host}" in
*** 68,72 ****
 	libgcj_flags="${libgcj_flags} -mieee"
 	libgcj_interpreter=yes
- 	libgcj_sjlj=yes
 	;;
 powerpc*-*)
--- 68,71 ----