gdb/

2009-03-05  Pedro Alves  <pedro@codesourcery.com>

	* breakpoint.c (check_duplicates_for): Skip permanent breakpoints
	duplicates of permanent breakpoints.

gdb/testsuite/
2009-03-05  Pedro Alves  <pedro@codesourcery.com>

	* gdb.arch/i386-permbkpt.S, gdb.arch/i386-permbkpt.exp: New.

gdb/ChangeLog

@@ -1,3 +1,8 @@
+2009-03-05  Pedro Alves  <pedro@codesourcery.com>
+
+	* breakpoint.c (check_duplicates_for): Skip permanent breakpoints
+	duplicates of permanent breakpoints.
+
 2009-03-04  Pedro Alves  <pedro@codesourcery.com>
 
 	* inferior.h (notice_new_inferior): Declare.

gdb/breakpoint.c

@@ -3948,8 +3948,8 @@ check_duplicates_for (CORE_ADDR address, struct obj_section *section)
     }
 
   /* If we found a permanent breakpoint at this address, go over the
-     list again and declare all the other breakpoints there to be the
+     list again and declare all the other breakpoints there (except
-     duplicates.  */
+     other permanent breakpoints) to be the duplicates.  */
   if (perm_bp)
     {
       perm_bp->duplicate = 0;
@@ -3963,7 +3963,8 @@ check_duplicates_for (CORE_ADDR address, struct obj_section *section)
       ALL_BP_LOCATIONS (b)
 	if (b != perm_bp)
 	  {
-	    if (b->owner->enable_state != bp_disabled
+	    if (b->owner->enable_state != bp_permanent
+		&& b->owner->enable_state != bp_disabled
 		&& b->owner->enable_state != bp_call_disabled
 		&& b->enabled && !b->shlib_disabled		
 		&& b->address == address	/* address / overlay match */

gdb/testsuite/ChangeLog

@@ -1,3 +1,7 @@
+2009-03-05  Pedro Alves  <pedro@codesourcery.com>
+
+	* gdb.arch/i386-permbkpt.S, gdb.arch/i386-permbkpt.exp: New.
+
 2009-02-18  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
 	* gdb.base/macscp.exp (objfile): Move it to ${objdir}/${subdir}/.

gdb/testsuite/gdb.arch/i386-permbkpt.S

@@ -0,0 +1,30 @@
+/* Copyright 2009 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/>.
+
+   This file is part of the gdb testsuite.  */
+
+#define CONCAT1(a, b) CONCAT2(a, b)
+#define CONCAT2(a, b) a ## b
+
+#ifdef SYMBOL_PREFIX
+# define SYMBOL(str)     CONCAT1(SYMBOL_PREFIX, str)
+#else
+# define SYMBOL(str)     str
+#endif
+
+	.global SYMBOL(main)
+SYMBOL(main):
+	int3
+	ret

gdb/testsuite/gdb.arch/i386-permbkpt.exp

@@ -0,0 +1,52 @@
+# Copyright (C) 2009 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/>.
+
+
+# This file is part of the gdb testsuite.
+
+if $tracelevel {
+    strace $tracelevel
+}
+
+# Test inserting breakpoints over permanent breakpoints on i386 and amd64.
+
+if { ![istarget "i?86-*-*"] && ![istarget "x86_64-*-*"] } then {
+    verbose "Skipping i386 test for multi break at permanent breakpoint location."
+    return
+}
+
+set testfile "i386-permbkpt"
+set srcfile ${testfile}.S
+set binfile ${objdir}/${subdir}/${testfile}
+
+# Some targets have leading underscores on assembly symbols.
+# TODO: detect this automatically
+set additional_flags ""
+if { [istarget "*-*-cygwin*"] || [istarget "*-*-mingw*"] } then {
+    set additional_flags "additional_flags=-DSYMBOL_PREFIX=_"
+}
+
+if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug $additional_flags]] != "" } {
+    untested i386-permbkpt.exp
+    return -1
+}
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+gdb_test "break main" "" "First permanent break"
+gdb_test "break main" "" "Second permanent break"