[RFC] [gdb/cli] Add maint info frame-unwinders
Tom de Vries
tdevries@suse.de
Thu Feb 9 13:06:58 GMT 2023
Add a new command "maint info frame-unwinders"
...
(gdb) help maint info frame-unwinders
List frame unwinders, starting with the highest priority.
...
Output for i386:
...
$ gdb -q -batch -ex "set arch i386" -ex "maint info frame-unwinders"
The target architecture is set to "i386".
dummy DUMMY_FRAME
dwarf2 tailcall TAILCALL_FRAME
inline INLINE_FRAME
i386 epilogue NORMAL_FRAME
dwarf2 NORMAL_FRAME
dwarf2 signal SIGTRAMP_FRAME
i386 stack tramp NORMAL_FRAME
i386 sigtramp SIGTRAMP_FRAME
i386 prologue NORMAL_FRAME
...
Output for x86_64:
...
$ gdb -q -batch -ex "set arch i386:x86-64" -ex "maint info frame-unwinders"
The target architecture is set to "i386:x86-64".
dummy DUMMY_FRAME
dwarf2 tailcall TAILCALL_FRAME
inline INLINE_FRAME
python NORMAL_FRAME
amd64 epilogue NORMAL_FRAME
i386 epilogue NORMAL_FRAME
dwarf2 NORMAL_FRAME
dwarf2 signal SIGTRAMP_FRAME
amd64 sigtramp SIGTRAMP_FRAME
amd64 prologue NORMAL_FRAME
i386 stack tramp NORMAL_FRAME
i386 sigtramp SIGTRAMP_FRAME
i386 prologue NORMAL_FRAME
...
Tested on x86_64-linux.
---
gdb/doc/gdb.texinfo | 4 ++++
gdb/frame-unwind.c | 28 ++++++++++++++++++++++++++++
gdb/frame.c | 4 ++--
gdb/frame.h | 4 ++++
4 files changed, 38 insertions(+), 2 deletions(-)
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index eebb6dd422a..709d4766317 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -40986,6 +40986,10 @@ with the DWARF frame unwinders enabled.
If DWARF frame unwinders are not supported for a particular target
architecture, then enabling this flag does not cause them to be used.
+@kindex maint info frame-unwinders
+@item maint info frame-unwinders
+List frame unwinders, starting with the highest priority.
+
@kindex maint set worker-threads
@kindex maint show worker-threads
@item maint set worker-threads
diff --git a/gdb/frame-unwind.c b/gdb/frame-unwind.c
index b708c64f967..43321e22230 100644
--- a/gdb/frame-unwind.c
+++ b/gdb/frame-unwind.c
@@ -28,6 +28,7 @@
#include "target.h"
#include "gdbarch.h"
#include "dwarf2/frame-tailcall.h"
+#include "cli/cli-cmds.h"
struct frame_unwind_table_entry
{
@@ -337,3 +338,30 @@ frame_unwind_got_address (frame_info_ptr frame, int regnum,
register_type (gdbarch, regnum), addr);
return reg_val;
}
+
+/* Implement "maintenance info frame-unwinders" command. */
+
+static void
+maintenance_info_frame_unwinders (const char *args, int from_tty)
+{
+ struct gdbarch *gdbarch = target_gdbarch ();
+ struct frame_unwind_table *table = get_frame_unwind_table (gdbarch);
+
+ for (struct frame_unwind_table_entry *entry = table->list; entry != NULL;
+ entry = entry->next)
+ {
+ const char *name = entry->unwinder->name;
+ const char *type = frame_type_str (entry->unwinder->type);
+
+ gdb_printf (gdb_stdout, "%-16s\t%-16s\n", name, type);
+ }
+}
+
+void _initialize_frame_unwind ();
+void
+_initialize_frame_unwind ()
+{
+ add_cmd ("frame-unwinders", class_maintenance, maintenance_info_frame_unwinders,
+ _("List frame unwinders, starting with the highest priority."),
+ &maintenanceinfolist);
+}
diff --git a/gdb/frame.c b/gdb/frame.c
index 9235a2ceb38..c69a3ea0cb0 100644
--- a/gdb/frame.c
+++ b/gdb/frame.c
@@ -439,9 +439,9 @@ frame_id::to_string () const
return res;
}
-/* Return a string representation of TYPE. */
+/* See frame.h. */
-static const char *
+const char *
frame_type_str (frame_type type)
{
switch (type)
diff --git a/gdb/frame.h b/gdb/frame.h
index 4a99bd660df..6ed8db0af56 100644
--- a/gdb/frame.h
+++ b/gdb/frame.h
@@ -203,6 +203,10 @@ enum frame_type
SENTINEL_FRAME
};
+/* Return a string representation of TYPE. */
+
+extern const char *frame_type_str (frame_type type);
+
/* A wrapper for "frame_info *". frame_info objects are invalidated
whenever reinit_frame_cache is called. This class arranges to
invalidate the pointer when appropriate. This is done to help
base-commit: c920e5cc604c5b20f9af7c75402eea94aa1e11c6
--
2.35.3
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