btrace, gdbserver: read branch trace incrementally

[deliverable/binutils-gdb.git] / gdb / gdbserver / target.h

diff --git a/gdb/gdbserver/target.h b/gdb/gdbserver/target.h
index d090a309ae6efe255e6e557dd4f6437873d9679e..ae48cd776d9edbef42e34a521bd46a1d3fc3977b 100644 (file)
--- a/gdb/gdbserver/target.h
+++ b/gdb/gdbserver/target.h
@@ -356,12 +356,15 @@ struct target_ops
      information struct for reading and for disabling branch trace.  */
   struct btrace_target_info *(*enable_btrace) (ptid_t ptid);
 
-  /* Disable branch tracing.  */
+  /* Disable branch tracing.
+     Returns zero on success, non-zero otherwise.  */
   int (*disable_btrace) (struct btrace_target_info *tinfo);
 
   /* Read branch trace data into buffer.  We use an int to specify the type
-     to break a cyclic dependency.  */
-  void (*read_btrace) (struct btrace_target_info *, struct buffer *, int type);
+     to break a cyclic dependency.
+     Return 0 on success; print an error message into BUFFER and return -1,
+     otherwise.  */
+  int (*read_btrace) (struct btrace_target_info *, struct buffer *, int type);
 
   /* Return true if target supports range stepping.  */
   int (*supports_range_stepping) (void);