Use multiple locations for hardware watchpoints.

	This eliminates the need to traverse value chain, doing
	various checks, in three different places.

        * breakpoint.h (struct bp_location): New fields
        lengths and watchpoint_type.
        (struct breakpoint): Remove the val_chain field.
        * breakpoint.c (is_hardware_watchpoint): New.
        (free_valchain): Remove.
        (update_watchpoint): New.
        (insert_bp_location): For hardware watchpoint, just
        directly insert it.
        (insert_breakpoints): Call update_watchpoint_locations
        on all watchpoints.  If we have failed to insert
        any location of a hardware watchpoint, remove all inserted
        locations.
        (remove_breakpoint): For hardware watchpoints, directly
        remove location.
        (watchpoints_triggered): Iterate over locations.
        (bpstat_stop_status): Use only first location of
        a resource watchpoint.
        (delete_breakpoint): Don't call free_valchain.
        (print_one_breakpoint): Don't print all
        locations for watchpoints.
        (breakpoint_re_set_one): Use update_watchpoint for
        watchpoints.

1 files changed, 68 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.base/watchpoint-solib.c b/gdb/testsuite/gdb.base/watchpoint-solib.c
new file mode 100644
index 0000000..b316024
--- /dev/null
+++ b/gdb/testsuite/gdb.base/watchpoint-solib.c
@@ -0,0 +1,68 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2004, 2007 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/>. */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifdef __WIN32__
+#include <windows.h>
+#define dlopen(name, mode) LoadLibrary (TEXT (name))
+#ifdef _WIN32_WCE
+# define dlsym(handle, func) GetProcAddress (handle, TEXT (func))
+#else
+# define dlsym(handle, func) GetProcAddress (handle, func)
+#endif
+#define dlclose(handle) FreeLibrary (handle)
+#define dlerror() "error %d occurred", GetLastError ()
+#else
+#include <dlfcn.h>
+#endif
+
+
+void open_shlib ()
+{
+  void *handle;
+  void (*foo) (int);
+
+  handle = dlopen (SHLIB_NAME, RTLD_LAZY);
+  
+  if (!handle)
+    {
+      fprintf (stderr, dlerror ());
+      exit (1);
+    }
+
+  foo = (void (*)(int))dlsym (handle, "foo");
+
+  if (!foo)
+    {
+      fprintf (stderr, dlerror ());
+      exit (1);
+    }
+
+  foo (1); // call to foo
+  foo (2);
+
+  dlclose (handle);
+}
+
+
+int main()
+{
+  open_shlib ();
+  return 0;
+}