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Re: [RFA] Add set/show debug unwind command

On Jun 15, 2012, at 8:22 PM, Joel Brobecker wrote:

>> We also document debug and maintenance commands in the manual.
> Thanks for reminding us! And NEWS as well, in fact.

Thanks for the comments.  Here is the new version.


2012-06-15  Tristan Gingold  <>

	* frame-unwind.c (show_unwind_debug): New function.
	(unwind_debug): New variable.
	(_initialize_frame_unwind): Add show debug unwind command.
	* frame-unwind.h (unwind_debug): Declare.
	* doc/gdb.texinfo (Debugging Output): Document set/show debug
	* NEWS: Mention it.

diff --git a/gdb/NEWS b/gdb/NEWS
index 476e5a0..2384489 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -503,6 +503,10 @@ show trace-stop-notes
   instance as an explanation, if you are stopping a trace run that was
   started by someone else.
+set debug unwind
+show debug unwind
+  Control display of debugging info for some unwinders.
 * New remote packets
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 014cfd8..30cd053 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -21850,6 +21850,11 @@ message.
 @item show debug timestamp
 Displays the current state of displaying timestamps with @value{GDBN}
 debugging info.
+@item set debug unwind
+@cindex unwinding debugging info
+Turns on or off display debugging info from some unwinders.
+@item show debug unwind
+Display the current state of displaying unwind debugging info.
 @item set debugvarobj
 @cindex variable object debugging info
 Turns on or off display of @value{GDBN} variable object debugging
diff --git a/gdb/frame-unwind.c b/gdb/frame-unwind.c
index c90144f..ab67a76 100644
--- a/gdb/frame-unwind.c
+++ b/gdb/frame-unwind.c
@@ -27,6 +27,8 @@
 #include "exceptions.h"
 #include "gdb_assert.h"
 #include "gdb_obstack.h"
+#include "command.h"
+#include "gdbcmd.h"
 static struct gdbarch_data *frame_unwind_data;
@@ -237,6 +239,20 @@ frame_unwind_got_address (struct frame_info *frame, int regnum,
   return reg_val;
+/* Flag to control debugging.  */
+int unwind_debug;
+/* Implements show debug unwind.  */
+static void
+show_unwind_debug (struct ui_file *file, int from_tty,
+		   struct cmd_list_element *c, const char *value)
+  fprintf_filtered (file, _("unwind debugging is %s.\n"), value);
 /* -Wmissing-prototypes */
 extern initialize_file_ftype _initialize_frame_unwind;
@@ -244,4 +260,15 @@ void
 _initialize_frame_unwind (void)
   frame_unwind_data = gdbarch_data_register_pre_init (frame_unwind_init);
+  /* Debug this files internals.  */
+  add_setshow_zinteger_cmd ("unwind", class_maintenance, &unwind_debug,
+			    _("Set unwind debugging."),
+			    _("Show unwind debugging."),
+			    _("When non-zero, frame specific internal "
+			      "debugging is enabled."),
+			    NULL,
+			    show_unwind_debug,
+			    &setdebuglist, &showdebuglist);
diff --git a/gdb/frame-unwind.h b/gdb/frame-unwind.h
index f82d763..64405b9 100644
--- a/gdb/frame-unwind.h
+++ b/gdb/frame-unwind.h
@@ -217,4 +217,8 @@ struct value *frame_unwind_got_bytes (struct frame_info *frame, int regnum,
 struct value *frame_unwind_got_address (struct frame_info *frame, int regnum,
 					CORE_ADDR addr);
+/* Flag to control debugging.  */
+extern int unwind_debug;

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