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[gdb/cli] Add maint info frame-unwinders

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Add a new command "maint info frame-unwinders":
...
(gdb) help maint info frame-unwinders
List the frame unwinders currently in effect, 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.

Reviewed-By: Tom Tromey <tom@tromey.com>
Reviewed-By: Eli Zaretskii <eliz@gnu.org>
This commit is contained in:
Tom de Vries 2023-02-10 13:07:14 +01:00
parent 779b250278
commit be01687991
5 changed files with 46 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
gdb/NEWS
View File

@ -52,6 +52,10 @@ maintenance print record-instruction [ N ]
prints how GDB would undo the N-th previous instruction, and if N is
positive, it prints how GDB will redo the N-th following instruction.
maintenance info frame-unwinders
List the frame unwinders currently in effect, starting with the highest
priority.
* MI changes
** mi now reports 'no-history' as a stop reason when hitting the end of the

4
gdb/doc/gdb.texinfo
View File

@ -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 the frame unwinders currently in effect, starting with the highest priority.
@kindex maint set worker-threads
@kindex maint show worker-threads
@item maint set worker-threads

32
gdb/frame-unwind.c
View File

@ -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 +338,34 @@ 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 "maint info frame-unwinders". */
add_cmd ("frame-unwinders",
class_maintenance,
maintenance_info_frame_unwinders,
_("List the frame unwinders currently in effect, "
"starting with the highest priority."),
&maintenanceinfolist);
}

4
gdb/frame.c
View File

@ -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)

4
gdb/frame.h
View File

@ -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