re PR libgcj/23367 (_Jv_FindMethodInCache is not thread-safe)

PR libgcj/23367:
	* include/jvm.h (_Jv_FreeMethodCache): Declare.
	* java/lang/natClass.cc (MCACHE_SIZE): Conditional on HAVE_TLS.
	(struct _Jv_mcache): Likewise.
	(method_cache): Likewise.
	(_Jv_FindMethodInCache): Do nothing unless TLS is available.
	(_Jv_AddMethodToCache): Likewise.
	(_Jv_FreeMethodCache): New function.
	* java/lang/natThread.cc (finish_): Call _Jv_FreeMethodCache.
	* aclocal.m4, configure, include/config.h.in: Rebuilt.
	* configure.ac: Invoke GCC_CHECK_TLS.

From-SVN: r104707

libjava/include/Makefile.in

@@ -43,6 +43,7 @@ DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in \
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
 am__aclocal_m4_deps = $(top_srcdir)/../config/acx.m4 \
 	$(top_srcdir)/../config/depstand.m4 \
+	$(top_srcdir)/../config/enable.m4 \
 	$(top_srcdir)/../config/gxx-include-dir.m4 \
 	$(top_srcdir)/../config/iconv.m4 \
 	$(top_srcdir)/../config/lcmessage.m4 \
@@ -51,9 +52,9 @@ am__aclocal_m4_deps = $(top_srcdir)/../config/acx.m4 \
 	$(top_srcdir)/../config/lib-link.m4 \
 	$(top_srcdir)/../config/lib-prefix.m4 \
 	$(top_srcdir)/../config/no-executables.m4 \
-	$(top_srcdir)/../libtool.m4 $(top_srcdir)/mingwld.m4 \
-	$(top_srcdir)/pkg.m4 $(top_srcdir)/shlibpath.m4 \
-	$(top_srcdir)/configure.ac
+	$(top_srcdir)/../config/tls.m4 $(top_srcdir)/../libtool.m4 \
+	$(top_srcdir)/mingwld.m4 $(top_srcdir)/pkg.m4 \
+	$(top_srcdir)/shlibpath.m4 $(top_srcdir)/configure.ac
 am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
 	$(ACLOCAL_M4)
 CONFIG_HEADER = config.h $(top_builddir)/gcj/libgcj-config.h

libjava/include/config.h.in

@@ -319,6 +319,9 @@
 /* Define if global 'timezone' exists. */
 #undef HAVE_TIMEZONE
 
+/* Define to 1 if the target supports thread-local storage. */
+#undef HAVE_TLS
+
 /* Define to 1 if your `struct tm' has `tm_zone'. Deprecated, use
    `HAVE_STRUCT_TM_TM_ZONE' instead. */
 #undef HAVE_TM_ZONE

libjava/include/jvm.h

@@ -359,6 +359,10 @@ void _Jv_SetInitialHeapSize (const char *arg);
    _Jv_GCSetMaximumHeapSize.  */
 void _Jv_SetMaximumHeapSize (const char *arg);
 
+/* Free the method cache, if one was allocated.  This is only called
+   during thread deregistration.  */
+void _Jv_FreeMethodCache ();
+
 extern "C" void JvRunMain (jclass klass, int argc, const char **argv);
 void _Jv_RunMain (jclass klass, const char *name, int argc, const char **argv, 
 		  bool is_jar);