re PR libgcj/19823 (java fails with non-executable memory)

2005-02-15  Bryce McKinlay  <mckinlay@redhat.com>

	PR libgcj/19823
	* configure.host: Set gc_use_mmap on *-linux*.
	* configure.ac: Define USE_MMAP if gc_use_mmap is set.
	* include/private/gc_priv.h: Include gc_config.h.
	* configure, include/gc_config.h.in: Rebuilt.

From-SVN: r95094

boehm-gc/ChangeLog

+2005-02-15  Bryce McKinlay  <mckinlay@redhat.com>
+
+	PR libgcj/19823
+	* configure.host: Set gc_use_mmap on *-linux*.
+	* configure.ac: Define USE_MMAP if gc_use_mmap is set.
+	* include/private/gc_priv.h: Include gc_config.h.
+	* configure, include/gc_config.h.in: Rebuilt.
+
 2005-02-07  Hans Boehm  <Hans.Boehm@hp.com>
 
 	* allchblk.c (GC_allochblk_nth): Dont overlook available space if

boehm-gc/configure

@@ -6558,6 +6558,14 @@ _ACEOF
   fi
 fi;
 
+if test "${gc_use_mmap}" = "yes"; then
+
+cat >>confdefs.h <<\_ACEOF
+#define USE_MMAP 1
+_ACEOF
+
+fi
+
 if test -n "$with_cross_host" &&
    test x"$with_cross_host" != x"no"; then
   toolexecdir='$(exec_prefix)/$(target_noncanonical)'

boehm-gc/configure.ac

@@ -446,6 +446,10 @@ AC_ARG_ENABLE(gc-debug,
     esac 
   fi])
 
+if test "${gc_use_mmap}" = "yes"; then
+  AC_DEFINE(USE_MMAP, 1, [use MMAP instead of sbrk to get new memory])
+fi
+
 if test -n "$with_cross_host" &&
    test x"$with_cross_host" != x"no"; then
   toolexecdir='$(exec_prefix)/$(target_noncanonical)'

boehm-gc/configure.host

@@ -18,8 +18,11 @@
 
 # It sets the following shell variables:
 #   gc_cflags	Special CFLAGS to use when building
+#   gc_use_mmap  Set to "yes" on platforms where mmap should be used instead
+#		 of sbrk. This will define USE_MMAP.
 
 gc_cflags=""
+gc_use_mmap=
 
 # We should set -fexceptions if we are using gcc and might be used
 # inside something like gcj.  This is the zeroth approximation:
@@ -37,6 +40,12 @@ else
     esac
 fi
 
+case "${host}" in
+  *-linux*)
+    gc_use_mmap=yes
+    ;;
+esac
+
 case "${target_optspace}:${host}" in
   yes:*)
     gc_cflags="${gc_cflags} -Os"

boehm-gc/include/gc_config.h.in

@@ -145,6 +145,9 @@
 /* define GC_local_malloc() & GC_local_malloc_atomic() */
 #undef THREAD_LOCAL_ALLOC
 
+/* use MMAP instead of sbrk to get new memory */
+#undef USE_MMAP
+
 /* POSIX version of C Source */
 #undef _POSIX_C_SOURCE
 

boehm-gc/include/private/gc_priv.h

@@ -19,6 +19,10 @@
 # ifndef GC_PRIVATE_H
 # define GC_PRIVATE_H
 
+/* Autoconf definitions. */
+/* FIXME: This should really be included directly from each .c file. */
+#include <gc_config.h>
+
 #if defined(mips) && defined(SYSTYPE_BSD) && defined(sony_news)
     /* sony RISC NEWS, NEWSOS 4 */
 #   define BSD_TIME