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[PATCH] Remove MAX_REGISTER_SIZE from mi/mi-main.c
- From: Alan Hayward <Alan dot Hayward at arm dot com>
- To: "gdb-patches at sourceware dot org" <gdb-patches at sourceware dot org>
- Cc: nd <nd at arm dot com>
- Date: Thu, 8 Jun 2017 09:42:44 +0000
- Subject: [PATCH] Remove MAX_REGISTER_SIZE from mi/mi-main.c
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Updated register_changed_p() to use cooked_read_value().
I considered moving this function into regcache as:
int regcache::register_cooked_compare (int regnum, struct regcache *prev_regs)
Decided not to because nothing else needs it. Would be happy to change.
Tested on a --enable-targets=all build
No regressions in gdb.mi/*.exp
Also tested with board files unix and native-gdbserver.
Ok to commit?
Alan.
2017-06-08 Alan Hayward <alan.hayward@arm.com>
* mi/mi-main.c (register_changed_p): Use cooked_read_value
diff --git a/gdb/mi/mi-main.c b/gdb/mi/mi-main.c
index bdc5dda30537c7e5797fb8c44b689a63c5c0f4b8..38d737f49f35953c7f5a9c957e918606baac63e3 100644
--- 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