gdb/

	* NEWS (New commands): Mention "set disable-randomization".
	* configure.ac: Add check for HAVE_PERSONALITY and
	HAVE_DECL_ADDR_NO_RANDOMIZE.
	* configure, config.in: Regenerate.
	* linux-nat.c [HAVE_PERSONALITY]: New include <sys/personality.h>.
	[HAVE_PERSONALITY] [!HAVE_DECL_ADDR_NO_RANDOMIZE]: Set
	ADDR_NO_RANDOMIZE.
	(disable_randomization, show_disable_randomization)
	(set_disable_randomization): New.
	(linux_nat_create_inferior) [HAVE_PERSONALITY]: New variables
	PERSONALITY_ORIG and PERSONALITY_SET.  Disable randomization upon the
	variable DISABLE_RANDOMIZATION.
	(_initialize_linux_nat): Call ADD_SETSHOW_BOOLEAN_CMD for the variable
	DISABLE_RANDOMIZATION.

gdb/doc/
	* gdb.texinfo (Starting): Document "set disable-randomization".

gdb/testsuite/
	* gdb.base/randomize.exp, gdb.base/randomize.c: New files.

3 files changed, 122 insertions, 0 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 3f837fb..eff1245 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2008-07-10  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* gdb.base/randomize.exp, gdb.base/randomize.c: New files.
+
 2008-07-09  Pedro Alves  <pedro@codesourcery.com>
 
 	* gdb.base/chng-syms.exp: Don't expect "No symbol ...".
diff --git a/gdb/testsuite/gdb.base/randomize.c b/gdb/testsuite/gdb.base/randomize.c
new file mode 100644
index 0000000..950f937
--- /dev/null
+++ b/gdb/testsuite/gdb.base/randomize.c
@@ -0,0 +1,31 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2008 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+   Please email any bugs, comments, and/or additions to this file to:
+   bug-gdb@prep.ai.mit.edu  */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+int main()
+{
+  void *p;
+
+  p = malloc (1);
+
+  return 0; /* print p */
+}
diff --git a/gdb/testsuite/gdb.base/randomize.exp b/gdb/testsuite/gdb.base/randomize.exp
new file mode 100644
index 0000000..b69412f
--- /dev/null
+++ b/gdb/testsuite/gdb.base/randomize.exp
@@ -0,0 +1,87 @@
+# Copyright 2008 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+set testfile randomize
+set srcfile ${testfile}.c
+set binfile ${objdir}/${subdir}/${testfile}
+if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
+    untested "Couldn't compile test program"
+    return -1
+}
+
+# Get things started.
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+proc address_get { testname } {
+    global gdb_prompt
+
+    if {![runto_main]} {
+	return -1
+    }
+
+    # Do not rely on printf; some test configurations don't work with stdio.
+
+    gdb_breakpoint [gdb_get_line_number "print p"]
+    gdb_continue_to_breakpoint "$testname - address set"
+
+    gdb_test_multiple "print/x p" $testname {
+	-re "\\$\[0-9\]+ = (0x\[0-9a-f\]*)\r?\n$gdb_prompt $" {
+	    pass $testname
+	    return $expect_out(1,string)
+	}
+    }
+}
+
+set test "set disable-randomization off"
+gdb_test_multiple "${test}" "${test}" {
+    -re "Disabling randomization .* unsupported .*$gdb_prompt $" {
+	untested "No randomization supported by this GDB"
+	return -1
+    }
+    -re "$gdb_prompt $" {
+	pass $test
+    }
+}
+gdb_test "show disable-randomization"	      \
+         "Disabling randomization .* is off." \
+         "show disable-randomization off"
+
+set addr1 [address_get "randomized first address"]
+set addr2 [address_get "randomized second address"]
+set test "randomized addresses should not match"
+if {$addr1 eq $addr2} {
+    untested "No randomization detected on this system"
+    return -1
+} else {
+    pass $test
+}
+
+gdb_test "set disable-randomization on"
+gdb_test "show disable-randomization"	      \
+         "Disabling randomization .* is on." \
+         "show disable-randomization on"
+
+set addr1 [address_get "fixed first address"]
+set addr2 [address_get "fixed second address"]
+set test "fixed addresses should match"
+if {$addr1 eq $addr2} {
+    pass $test
+} else {
+    fail $test
+}