[patch v8 18/24] record-btrace: add to_wait and to_resume target methods.

Markus Metzger
2013-12-12T09:16:03Z

Add simple to_wait and to_resume target methods that prevent stepping when the
current replay position is not at the end of the execution log.

2013-12-12 Markus Metzger <markus.t.metzger@intel.com>

* record-btrace.c (record_btrace_resume): New.
(record_btrace_wait): New.
(init_record_btrace_ops): Initialize to_wait and to_resume.

---
gdb/record-btrace.c | 41 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)

diff --git a/gdb/record-btrace.c b/gdb/record-btrace.c
index ec99ba2..f2aa4fa 100644
--- a/gdb/record-btrace.c
+++ b/gdb/record-btrace.c
@@ -953,6 +953,45 @@ static const struct frame_unwind record_btrace_frame_unwind =
NULL,
record_btrace_frame_sniffer
};
+
+/* The to_resume method of target record-btrace. */
+
+static void
+record_btrace_resume (struct target_ops *ops, ptid_t ptid, int step,
+ enum gdb_signal signal)
+{
+ /* As long as we're not replaying, just forward the request. */
+ if (!record_btrace_is_replaying ())
+ {
+ for (ops = ops->beneath; ops != NULL; ops = ops->beneath)
+ if (ops->to_resume != NULL)
+ return ops->to_resume (ops, ptid, step, signal);
+
+ error (_("Cannot find target for stepping."));
+ }
+
+ error (_("You can't do this from here. Do 'record goto end', first."));
+}
+
+/* The to_wait method of target record-btrace. */
+
+static ptid_t
+record_btrace_wait (struct target_ops *ops, ptid_t ptid,
+ struct target_waitstatus *status, int options)
+{
+ /* As long as we're not replaying, just forward the request. */
+ if (!record_btrace_is_replaying ())
+ {
+ for (ops = ops->beneath; ops != NULL; ops = ops->beneath)
+ if (ops->to_wait != NULL)
+ return ops->to_wait (ops, ptid, status, options);
+
+ error (_("Cannot find target for waiting."));
+ }
+
+ error (_("You can't do this from here. Do 'record goto end', first."));
+}
+
/* Initialize the record-btrace target ops. */

static void
@@ -985,6 +1024,8 @@ init_record_btrace_ops (void)
ops->to_store_registers = record_btrace_store_registers;
ops->to_prepare_to_store = record_btrace_prepare_to_store;
ops->to_get_unwinder = &record_btrace_frame_unwind;
+ ops->to_resume = record_btrace_resume;
+ ops->to_wait = record_btrace_wait;
ops->to_stratum = record_stratum;
ops->to_magic = OPS_MAGIC;
}
--
1.8.3.1