[RFA 3/6] Remove cleanup from ppc-linux-nat.c

[Tom Tromey <tom@tromey.com>]

This removes a cleanup from ppc-linux-nat.c, by using
unique_xmalloc_ptr.  It also slightly simplifies the code by using
XDUP rather than XNEW and memcpy.

ChangeLog
2017-10-15  Tom Tromey  <tom@tromey.com>

	* ppc-linux-nat.c (hwdebug_insert_point): Use
	gdb::unique_xmalloc_ptr, XDUP.
---
 gdb/ChangeLog       |  5 +++++
 gdb/ppc-linux-nat.c | 11 +++--------
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/gdb/ppc-linux-nat.c b/gdb/ppc-linux-nat.c
index 45c8903ef6..7c8ab6c67b 100644
--- a/gdb/ppc-linux-nat.c
+++ b/gdb/ppc-linux-nat.c
@@ -1541,16 +1541,13 @@ hwdebug_insert_point (struct ppc_hw_breakpoint *b, int tid)
 {
   int i;
   long slot;
-  struct ppc_hw_breakpoint *p = XNEW (struct ppc_hw_breakpoint);
+  gdb::unique_xmalloc_ptr<ppc_hw_breakpoint> p (XDUP (ppc_hw_breakpoint, b));
   struct hw_break_tuple *hw_breaks;
-  struct cleanup *c = make_cleanup (xfree, p);
   struct thread_points *t;
   struct hw_break_tuple *tuple;
 
-  memcpy (p, b, sizeof (struct ppc_hw_breakpoint));
-
   errno = 0;
-  slot = ptrace (PPC_PTRACE_SETHWDEBUG, tid, 0, p);
+  slot = ptrace (PPC_PTRACE_SETHWDEBUG, tid, 0, p.get ());
   if (slot < 0)
     perror_with_name (_("Unexpected error setting breakpoint or watchpoint"));
 
@@ -1564,13 +1561,11 @@ hwdebug_insert_point (struct ppc_hw_breakpoint *b, int tid)
     if (hw_breaks[i].hw_break == NULL)
       {
 	hw_breaks[i].slot = slot;
-	hw_breaks[i].hw_break = p;
+	hw_breaks[i].hw_break = p.release ();
 	break;
       }
 
   gdb_assert (i != max_slots_number);
-
-  discard_cleanups (c);
 }
 
 /* This function is a generic wrapper that is responsible for removing a
-- 
2.13.6