Fix erroneous cleanup use in add_solib_catchpoint

I happened to notice that add_solib_catchpoint allocated the new
catchpoint with "new" but installed a cleanup using "xfree".  This
patch fixes the bug by changing the function to use std::unique_ptr
instead.

ChangeLog
2017-08-22  Tom Tromey  <tom@tromey.com>

	* breakpoint.c (add_solib_catchpoint): Use std::unique_ptr.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index e2917199ff6143f127dcb9cc77a3a0c9d7fc8060..1cd0eaa3bc10e3663ea6eb6b2a87a385730a505d 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2017-08-22  Tom Tromey  <tom@tromey.com>
+
+       * breakpoint.c (add_solib_catchpoint): Use std::unique_ptr.
+
 2017-08-22  Tom Tromey  <tom@tromey.com>
 
        * psymtab.c (psymtab_search_name): Return a unique_xmalloc_ptr.

diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index bc681cf0ad24e01511dff99ed3beb8b112bf321b..135741af4d8a6baa42631a4be15b9e6dc14807b6 100644 (file)
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -8464,16 +8464,13 @@ static struct breakpoint_ops catch_solib_breakpoint_ops;
 void
 add_solib_catchpoint (const char *arg, int is_load, int is_temp, int enabled)
 {
-  struct solib_catchpoint *c;
   struct gdbarch *gdbarch = get_current_arch ();
-  struct cleanup *cleanup;
 
   if (!arg)
     arg = "";
   arg = skip_spaces_const (arg);
 
-  c = new solib_catchpoint ();
-  cleanup = make_cleanup (xfree, c);
+  std::unique_ptr<solib_catchpoint> c (new solib_catchpoint ());
 
   if (*arg != '\0')
     {
@@ -8483,13 +8480,12 @@ add_solib_catchpoint (const char *arg, int is_load, int is_temp, int enabled)
     }
 
   c->is_load = is_load;
-  init_catchpoint (c, gdbarch, is_temp, NULL,
+  init_catchpoint (c.get (), gdbarch, is_temp, NULL,
                   &catch_solib_breakpoint_ops);
 
   c->enable_state = enabled ? bp_enabled : bp_disabled;
 
-  discard_cleanups (cleanup);
-  install_breakpoint (0, c, 1);
+  install_breakpoint (0, c.release (), 1);
 }
 
 /* A helper function that does all the work for "catch load" and