Remove MAX_REGISTER_SIZE from mi/mi-main.c

gdb/
	* mi/mi-main.c (register_changed_p): Use cooked_read_value.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 673210a..70736f5 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2017-06-08  Alan Hayward  <alan.hayward@arm.com>
+
+       * mi/mi-main.c (register_changed_p): Use cooked_read_value.
+
 2017-06-07  Sergio Durigan Junior  <sergiodj@redhat.com>
 
        * NEWS (Changes since GDB 8.0): Announce that GDBserver is now

diff --git a/gdb/mi/mi-main.c b/gdb/mi/mi-main.c
index bdc5dda..38d737f 100644 (file)
--- a/gdb/mi/mi-main.c
+++ b/gdb/mi/mi-main.c
@@ -1111,10 +1111,8 @@ register_changed_p (int regnum, struct regcache *prev_regs,
                    struct regcache *this_regs)
 {
   struct gdbarch *gdbarch = get_regcache_arch (this_regs);
-  gdb_byte prev_buffer[MAX_REGISTER_SIZE];
-  gdb_byte this_buffer[MAX_REGISTER_SIZE];
-  enum register_status prev_status;
-  enum register_status this_status;
+  struct value *prev_value, *this_value;
+  int ret;
 
   /* First time through or after gdbarch change consider all registers
      as changed.  */
@@ -1122,16 +1120,28 @@ register_changed_p (int regnum, struct regcache *prev_regs,
     return 1;
 
   /* Get register contents and compare.  */
-  prev_status = regcache_cooked_read (prev_regs, regnum, prev_buffer);
-  this_status = regcache_cooked_read (this_regs, regnum, this_buffer);
-
-  if (this_status != prev_status)
-    return 1;
-  else if (this_status == REG_VALID)
-    return memcmp (prev_buffer, this_buffer,
-                  register_size (gdbarch, regnum)) != 0;
+  prev_value = prev_regs->cooked_read_value (regnum);
+  this_value = this_regs->cooked_read_value (regnum);
+  gdb_assert (prev_value != NULL);
+  gdb_assert (this_value != NULL);
+
+  if (value_optimized_out (prev_value) != value_optimized_out (this_value)
+      || value_entirely_available (prev_value)
+        != value_entirely_available (this_value))
+    ret = 1;
+  if (value_optimized_out (prev_value)
+      || !value_entirely_available (prev_value))
+    ret = 0;
   else
-    return 0;
+    ret = memcmp (value_contents_all (prev_value),
+                 value_contents_all (this_value),
+                 register_size (gdbarch, regnum)) != 0;
+
+  release_value (prev_value);
+  release_value (this_value);
+  value_free (prev_value);
+  value_free (this_value);
+  return ret;
 }
 
 /* Return a list of register number and value pairs.  The valid