gdb/

	Fix hw watchpoints created before the inferior was started.
	* breakpoint.c (update_watchpoint): Convert the bp_watchpoint and
	bp_hardware_watchpoint types according to the current runtime state.
gdb/testsuite/
	* gdb.base/watchpoint-hw.exp, gdb.base/watchpoint-hw.c: New.

5 files changed, 110 insertions, 0 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 7eb32ab..be33dcf 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2008-12-21  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Fix hw watchpoints created before the inferior was started.
+	* breakpoint.c (update_watchpoint): Convert the bp_watchpoint and
+	bp_hardware_watchpoint types according to the current runtime state.
+
 2008-12-18  Pedro Alves  <pedro@codesourcery.com>
 
 	* linux-nat.c (linux_child_follow_fork): If following the child,
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 0322d02..fac96b6 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -891,6 +891,27 @@ update_watchpoint (struct breakpoint *b, int reparse)
 	  b->val_valid = 1;
 	}
 
+	/* Change the type of breakpoint between hardware assisted or an
+	   ordinary watchpoint depending on the hardware support and free
+	   hardware slots.  REPARSE is set when the inferior is started.  */
+	if ((b->type == bp_watchpoint || b->type == bp_hardware_watchpoint)
+	    && reparse)
+	  {
+	    int i, mem_cnt, target_resources_ok, other_type_used;
+
+	    i = hw_watchpoint_used_count (bp_hardware_watchpoint,
+					  &other_type_used);
+	    mem_cnt = can_use_hardware_watchpoint (val_chain);
+
+	    if (mem_cnt)
+	      target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT
+			 (bp_hardware_watchpoint, i + mem_cnt, other_type_used);
+	    if (!mem_cnt || target_resources_ok <= 0)
+	      b->type = bp_watchpoint;
+	    else
+	      b->type = bp_hardware_watchpoint;
+	  }
+
       /* Look at each value on the value chain.  */
       for (v = val_chain; v; v = next)
 	{
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index e8b18bd..23a1cfe 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2008-12-21  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* gdb.base/watchpoint-hw.exp, gdb.base/watchpoint-hw.c: New.
+
 2008-12-16  Christophe Lyon  <christophe.lyon@st.com>
 
 	* gdb.base/expand-psymtabs.c: Insert code in foo so that the
diff --git a/gdb/testsuite/gdb.base/watchpoint-hw.c b/gdb/testsuite/gdb.base/watchpoint-hw.c
new file mode 100644
index 0000000..f6eea6f
--- /dev/null
+++ b/gdb/testsuite/gdb.base/watchpoint-hw.c
@@ -0,0 +1,27 @@
+/* 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  */
+
+int watchee;
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/gdb/testsuite/gdb.base/watchpoint-hw.exp b/gdb/testsuite/gdb.base/watchpoint-hw.exp
new file mode 100644
index 0000000..0d36c55
--- /dev/null
+++ b/gdb/testsuite/gdb.base/watchpoint-hw.exp
@@ -0,0 +1,52 @@
+# 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/>.
+
+# Arch not supporting hw watchpoints does not imply no_hardware_watchpoints set.
+if {(![istarget "i?86-*-*"] && ![istarget "x86_64-*-*"]
+     && ![istarget "ia64-*-*"] && ![istarget "s390*-*-*"])
+    || [target_info exists gdb,no_hardware_watchpoints]} then {
+    verbose "Skipping watchpoint-hw test."
+    return
+}
+
+set testfile watchpoint-hw
+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
+}
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+# Create the watchpoint before the inferior gets started.  Now the native CPU
+# target is still not active and its `to_can_use_hw_breakpoint' is not
+# installed, therefore only a software watchpoint gets created.
+
+gdb_test "watch watchee" "atchpoint 1: watchee"
+
+# `runto_main' or `runto main' would delete the watchpoint created above.
+
+if { [gdb_start_cmd] < 0 } {
+    untested start
+    return -1
+}
+gdb_test "" "main .* at .*" "start"
+
+# Check it is really a `hw'-watchpoint.
+gdb_test "info watchpoints" "1 *hw watchpoint .* watchee"