2 files changed, 20 insertions, 0 deletions
diff --git a/.gdbinit b/.gdbinit
index c86081f6ec..6481376d48 100644
--- a/.gdbinit
+++ b/.gdbinit
@@ -755,3 +755,16 @@ define rb_ps_thread
   set $ps_thread_id = $arg1
   print $ps_thread_th = (rb_thread_t*)$ps_thread->data
 end
+
+# Details: https://bugs.ruby-lang.org/projects/ruby-trunk/wiki/MachineInstructionsTraceWithGDB
+define trace_machine_instructions
+  set logging on
+  set height 0
+  set width 0
+  display/i $pc
+  while !$exit_code
+    info line *$pc
+    si
+  end
+end
+
diff --git a/ChangeLog b/ChangeLog
index 405a24da5d..a083cd720c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Thu Jun 07 15:53:03 2012  Koichi Sasada  <ko1@atdot.net>
+
+	* .gdbinit: add function `trace_machine_instructions' to trace
+	  in native machine assemble.
+	  See https://bugs.ruby-lang.org/projects/ruby-trunk/wiki/MachineInstructionsTraceWithGDB
+	  for more details.
+
 Wed Jun  6 21:31:21 2012  Tanaka Akira  <akr@fsij.org>
 
 	* process.c (proc_exec_cmd) renamed from proc_exec_v.