re PR libgcj/49315 (Throw_2 SEGVs on Tru64 UNIX)

PR libgcj/49315
	* include/solaris-signal.h: Rename to ...
	* include/posix-signal.h: ... this.
	(SA_FLAGS): Define.
	(SIGNAL_HANDLER): Handle non-SA_SIGINFO case.
	(sa_signal_handler): Define.
	(_INIT_SIG_HANDLER): New macro.
	(INIT_SEGV, INIT_FPE): Use it.
	* configure.ac (SIGNAL_HANDLER): Use it on alpha*-dec-osf*,
	mips-sgi-irix*, *-*-solaris2*
	* configure: Regenerate.
	* include/aix-signal.h: Refer to AIX.
	* configure.host (alpha*-dec-osf*): Enable can_unwind_signal.
	(mips-sgi-irix6*): Likewise.

From-SVN: r175138

libjava/ChangeLog

@@ -1,3 +1,20 @@
+2011-06-17  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	PR libgcj/49315
+	* include/solaris-signal.h: Rename to ...
+	* include/posix-signal.h: ... this.
+	(SA_FLAGS): Define.
+	(SIGNAL_HANDLER): Handle non-SA_SIGINFO case.
+	(sa_signal_handler): Define.
+	(_INIT_SIG_HANDLER): New macro.
+	(INIT_SEGV, INIT_FPE): Use it.
+	* configure.ac (SIGNAL_HANDLER): Use it on alpha*-dec-osf*,
+	mips-sgi-irix*, *-*-solaris2*
+	* configure: Regenerate.
+	* include/aix-signal.h: Refer to AIX.
+	* configure.host (alpha*-dec-osf*): Enable can_unwind_signal.
+	(mips-sgi-irix6*): Likewise.
+
 2011-05-31  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR libgcj/49193

libjava/configure

@@ -24215,12 +24215,12 @@ SYSDEP_SOURCES=
 SIGNAL_HANDLER_AUX=
 
 case "${host}" in
+ alpha*-dec-osf* | mips-sgi-irix* | *-*-solaris2*)
+    SIGNAL_HANDLER=include/posix-signal.h
+    ;;
  i?86-*-linux*)
     SIGNAL_HANDLER=include/i386-signal.h
     ;;
- *-*-solaris2*)
-    SIGNAL_HANDLER=include/solaris-signal.h
-    ;;
 # ia64-*)
 #    SYSDEP_SOURCES=sysdep/ia64.c
 #    test -d sysdep || mkdir sysdep

libjava/configure.ac

@@ -1727,12 +1727,12 @@ SYSDEP_SOURCES=
 SIGNAL_HANDLER_AUX=
 
 case "${host}" in
+ alpha*-dec-osf* | mips-sgi-irix* | *-*-solaris2*)
+    SIGNAL_HANDLER=include/posix-signal.h
+    ;;
  i?86-*-linux*)
     SIGNAL_HANDLER=include/i386-signal.h
     ;;
- *-*-solaris2*)
-    SIGNAL_HANDLER=include/solaris-signal.h
-    ;;
 # ia64-*)
 #    SYSDEP_SOURCES=sysdep/ia64.c
 #    test -d sysdep || mkdir sysdep

libjava/configure.host

@@ -274,6 +274,9 @@ EOF
 	  rm -f conftest conftest.c
 	fi
 	;;
+  alpha*-dec-osf*)
+	can_unwind_signal=yes
+	;;
   i[34567]86*-kfreebsd*-gnu | x86_64*-kfreebsd*-gnu)
         libgcj_ld_symbolic='-Wl,-Bsymbolic'
         slow_pthread_self=
@@ -283,6 +286,7 @@ EOF
 	DIVIDESPEC=-f%{m32:no-}%{!m32:%{!m64:no-}}%{m64:}use-divide-subroutine
 	;;
   mips-sgi-irix6* )
+	can_unwind_signal=yes
 	sysdeps_dir=mips
 	;;
   arm*-linux* )

libjava/include/aix-signal.h

@@ -1,7 +1,7 @@
 /* aix-signal.h - Catch runtime signals and turn them into exceptions,
-   on a Darwin system.  */
+   on a AIX system.  */
 
-/* Copyright (C) 2008  Free Software Foundation
+/* Copyright (C) 2008, 2011  Free Software Foundation
 
    This file is part of libgcj.
 

libjava/include/posix-signal.h

@@ -0,0 +1,60 @@
+// posix-signal.h - Catch runtime signals and turn them into exceptions.
+
+/* Copyright (C) 1998, 1999, 2000, 2009, 2011  Free Software Foundation
+
+   This file is part of libgcj.
+
+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>
+
+#define HANDLE_SEGV 1
+#define HANDLE_FPE 1
+
+/* Different implementations of MD_FALLBACK_FRAME_STATE_FOR either require
+   SA_SIGINFO being set or fail if so.  Cf. gcc/ada/init.c
+   (__gnat_install_handler) for details.  */
+
+#if (defined __alpha__ && defined __osf__) \
+  || (defined __sun__ && defined __svr4__)
+#define SA_FLAGS SA_NODEFER | SA_SIGINFO
+#elif defined __sgi__
+#define SA_FLAGS SA_NODEFER
+#else
+#error Must define SA_FLAGS.
+#endif
+
+#if SA_FLAGS & SA_SIGINFO
+#define SIGNAL_HANDLER(_name)						\
+static void _Jv_##_name (int,						\
+			 siginfo_t *_si __attribute__ ((__unused__)),	\
+			 void *_uc __attribute__ ((__unused__)))
+#define sa_signal_handler sa_sigaction
+#else
+#define SIGNAL_HANDLER(_name)						\
+static void _Jv_##_name (int)
+#define sa_signal_handler sa_handler
+#endif
+
+#define MAKE_THROW_FRAME(_exception)
+
+#define _INIT_SIG_HANDLER(_SIG, _ACTION)     				\
+do                                           				\
+  {									\
+    struct sigaction act;						\
+    act.sa_signal_handler = _Jv_##_ACTION;				\
+    act.sa_flags = SA_FLAGS;						\
+    sigemptyset (&act.sa_mask);						\
+    sigaction(_SIG, &act, NULL);					\
+  }									\
+while (0)
+
+#define INIT_SEGV	_INIT_SIG_HANDLER (SIGSEGV, catch_segv)
+#define INIT_FPE	_INIT_SIG_HANDLER (SIGFPE, catch_fpe)
+
+#endif /* JAVA_SIGNAL_H */

libjava/include/solaris-signal.h

@@ -1,48 +0,0 @@
-// sparc-signal.h - Catch runtime signals and turn them into exceptions.
-
-/* Copyright (C) 1998, 1999, 2000, 2009  Free Software Foundation
-
-   This file is part of libgcj.
-
-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>
-
-#define HANDLE_SEGV 1
-#define HANDLE_FPE 1
-
-#define SIGNAL_HANDLER(_name)						\
-static void _Jv_##_name (int,						\
-			 siginfo_t *_si __attribute__ ((__unused__)),	\
-			 void *_uc __attribute__ ((__unused__)))
-
-#define MAKE_THROW_FRAME(_exception)
-
-#define INIT_SEGV						\
-do								\
-  {								\
-    struct sigaction act;					\
-    act.sa_sigaction = _Jv_catch_segv;				\
-    act.sa_flags = SA_SIGINFO | SA_NODEFER;			\
-    sigemptyset (&act.sa_mask);					\
-    sigaction (SIGSEGV, &act, NULL);				\
-  }								\
-while (0)							
-								
-#define INIT_FPE						\
-do								\
-  {								\
-    struct sigaction act;					\
-    act.sa_sigaction = _Jv_catch_fpe;				\
-    act.sa_flags = SA_SIGINFO | SA_NODEFER;			\
-    sigemptyset (&act.sa_mask);					\
-    sigaction (SIGFPE, &act, NULL);				\
-  }								\
-while (0)
-
-#endif /* JAVA_SIGNAL_H */