[PING] [PATCH v5] [PR mi/29554] New PRINT-VALUES option '--scalar-values'.

[Gareth Rees <grees@undo.io>]

After four rounds of review, this must be getting close to being
mergeable! But do let me know if there's anything else that I need to
improve here.


On Thu, 20 Oct 2022 at 18:47, Gareth Rees <grees@undo.io> wrote:
>
> SUMMARY
>
> The '--simple-values' argument to '-stack-list-arguments' and similar
> GDB/MI commands does not take reference types into account, so that
> references to arbitrarily large structures are considered "simple" and
> printed. This means that the '--simple-values' argument cannot be used
> by IDEs when tracing the stack due to the time taken to print large
> structures passed by reference.
>
> DETAILS
>
> Various GDB/MI commands ('-stack-list-arguments', '-stack-list-locals',
> '-stack-list-variables' and so on) take a PRINT-VALUES argument which
> may be '--no-values' (0), '--all-values' (1) or '--simple-values' (2).
> In the '--simple-values' case, the command is supposed to print the
> name, type, and value of variables with simple types, and print only the
> name and type of variables with compound types.
>
> The '--simple-values' argument ought to be suitable for IDEs that need
> to update their user interface with the program's call stack every time
> the program stops. However, it does not take C++ reference types into
> account, and this makes the argument unsuitable for this purpose.
>
> For example, consider the following C++ program:
>
>     struct s {
>         int v[10];
>     };
>
>     int
>     sum(const struct s &s)
>     {
>         int total = 0;
>         for (int i = 0; i < 10; ++i) total += s.v[i];
>         return total;
>     }
>
>     int
>     main(void)
>     {
>         struct s s = { { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 } };
>         return sum(s);
>     }
>
> If we start GDB in MI mode and continue to 'sum', the behaviour of
> '-stack-list-arguments' is as follows:
>
>     (gdb)
>     -stack-list-arguments --simple-values
>     ^done,stack-args=[frame={level="0",args=[{name="s",type="const s &",value="@0x7fffffffe310: {v = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}}"}]},frame={level="1",args=[]}]
>
> Note that the value of the argument 's' was printed, even though 's' is
> a reference to a structure, which is not a simple value.
>
> See https://github.com/microsoft/MIEngine/pull/673 for a case where this
> behaviour caused Microsoft to avoid the use of '--simple-values' in
> their MIEngine debug adapter, because it caused Visual Studio Code to
> take too long to refresh the call stack in the user interface.
>
> SOLUTIONS
>
> There are two ways we could fix this problem, depending on whether we
> consider the current behaviour to be a bug that can be fixed.
>
> 1. If the current behaviour is a bug that can be fixed, then we can
>    update the behaviour of '--simple-values' so that it takes
>    reference types into account: that is, a value is simple if it is
>    neither an array, struct, or union, nor a reference to an array,
>    struct or union.
>
>    In this case we must add a feature to the '-list-features' command so
>    that IDEs can detect that it is safe to use the '--simple-values'
>    argument when refreshing the call stack.
>
> 2. If the current behaviour is not a bug, or cannot be changed due to
>    backwards compatibility concerns, then we can add a new option for
>    the PRINT-VALUES argument, for example, '--scalar-values' (3), that
>    would be suitable for use by IDEs.
>
>    In this case we must add a feature to the '-list-features' command so
>    that IDEs can detect that the '--scalar-values' argument is
>    available for use when refreshing the call stack.
>
> PATCH
>
> This patch implements solution (2), adding a '--scalar-values' option
> for the PRINT-VALUES argument to '-stack-list-arguments' and similar
> commands. This option prints the value only for scalars and so matches
> the behaviour of the 'scalars' argument to the 'set print
> frame-arguments' command. References to structures are not scalars,
> and so the option is suitable for use by IDEs.
>
> Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29554
> ---
>  gdb/NEWS                                      |  9 +++
>  gdb/doc/gdb.texinfo                           | 59 ++++++++++-------
>  gdb/extension.h                               |  3 +
>  gdb/mi/mi-cmd-stack.c                         | 16 ++---
>  gdb/mi/mi-cmd-var.c                           | 45 ++++++++++---
>  gdb/mi/mi-cmds.h                              | 17 ++++-
>  gdb/mi/mi-main.c                              | 35 ++++-------
>  gdb/mi/mi-parse.c                             |  8 ++-
>  gdb/python/py-framefilter.c                   | 40 ++++++------
>  gdb/testsuite/gdb.mi/mi-stack.exp             | 37 ++++++++++-
>  gdb/testsuite/gdb.mi/print-values.cc          | 63 +++++++++++++++++++
>  gdb/testsuite/gdb.mi/print-values.exp         | 53 ++++++++++++++++
>  .../gdb.python/py-framefilter-mi.exp          | 28 +++++++++
>  13 files changed, 323 insertions(+), 90 deletions(-)
>  create mode 100644 gdb/testsuite/gdb.mi/print-values.cc
>  create mode 100644 gdb/testsuite/gdb.mi/print-values.exp
>
> diff --git a/gdb/NEWS b/gdb/NEWS
> index dee0ac2ecd8..9ad441691ea 100644
> --- a/gdb/NEWS
> +++ b/gdb/NEWS
> @@ -114,6 +114,15 @@ maintenance info line-table
>    entry corresponds to an address where a breakpoint should be placed
>    to be at the first instruction past a function's prologue.
>
> +* MI changes
> +
> +  ** The '-stack-list-arguments', '-stack-list-locals',
> +     '-stack-list-variables', and '-var-list-children' commands
> +     support the '--scalar-values' option, which requests the command
> +     to print values only for scalar types.  Support for this feature
> +     can be verified by using the '-list-features' command, which
> +     now includes "scalar-values".
> +
>  * New targets
>
>  GNU/Linux/LoongArch (gdbserver)        loongarch*-*-linux*
> diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
> index 238a49b027d..b2b53de1022 100644
> --- a/gdb/doc/gdb.texinfo
> +++ b/gdb/doc/gdb.texinfo
> @@ -33326,12 +33326,14 @@ larger than the actual number of frames.  On the other hand,
>  @var{high-frame} may be larger than the actual number of frames, in
>  which case only existing frames will be returned.
>
> -If @var{print-values} is 0 or @code{--no-values}, print only the names of
> -the variables; if it is 1 or @code{--all-values}, print also their
> -values; and if it is 2 or @code{--simple-values}, print the name,
> -type and value for simple data types, and the name and type for arrays,
> -structures and unions.  If the option @code{--no-frame-filters} is
> -supplied, then Python frame filters will not be executed.
> +If @var{print-values} is 0 or @code{--no-values}, print only the names
> +of the variables; if it is 1 or @code{--all-values}, print also their
> +values; if it is 2 or @code{--simple-values}, print the name, type and
> +value for simple data types, and the name and type for arrays,
> +structures and unions; and if it is 3 or @code{--scalar-values}, print
> +the name, type and value for scalar data types, and the name and type
> +otherwise.  If the option @code{--no-frame-filters} is supplied, then
> +Python frame filters will not be executed.
>
>  If the @code{--skip-unavailable} option is specified, arguments that
>  are not available are not listed.  Partially available arguments
> @@ -33549,13 +33551,15 @@ Show a single frame:
>  Display the local variable names for the selected frame.  If
>  @var{print-values} is 0 or @code{--no-values}, print only the names of
>  the variables; if it is 1 or @code{--all-values}, print also their
> -values; and if it is 2 or @code{--simple-values}, print the name,
> -type and value for simple data types, and the name and type for arrays,
> -structures and unions.  In this last case, a frontend can immediately
> -display the value of simple data types and create variable objects for
> -other data types when the user wishes to explore their values in
> -more detail.  If the option @code{--no-frame-filters} is supplied, then
> -Python frame filters will not be executed.
> +values; if it is 2 or @code{--simple-values}, print the name, type and
> +value for simple data types, and the name and type for arrays,
> +structures and unions; and if it is 3 or @code{--scalar-values}, print
> +the name, type and value for scalar data types, and the name and type
> +otherwise.  In the last two cases, a frontend can immediately display
> +the value of simple or scalar data types and create variable objects
> +for other data types when the user wishes to explore their values in
> +more detail.  If the option @code{--no-frame-filters} is supplied,
> +then Python frame filters will not be executed.
>
>  If the @code{--skip-unavailable} option is specified, local variables
>  that are not available are not listed.  Partially available local
> @@ -33594,13 +33598,16 @@ This command is deprecated in favor of the
>   -stack-list-variables [ --no-frame-filters ] [ --skip-unavailable ] @var{print-values}
>  @end smallexample
>
> -Display the names of local variables and function arguments for the selected frame.  If
> -@var{print-values} is 0 or @code{--no-values}, print only the names of
> -the variables; if it is 1 or @code{--all-values}, print also their
> -values; and if it is 2 or @code{--simple-values}, print the name,
> -type and value for simple data types, and the name and type for arrays,
> -structures and unions.  If the option @code{--no-frame-filters} is
> -supplied, then Python frame filters will not be executed.
> +Display the names of local variables and function arguments for the
> +selected frame.  If @var{print-values} is 0 or @code{--no-values},
> +print only the names of the variables; if it is 1 or
> +@code{--all-values}, print also their values; if it is 2 or
> +@code{--simple-values}, print the name, type and value for simple data
> +types, and the name and type for arrays, structures and unions; and if
> +it is 3 or @code{--scalar-values}, print the name, type and value for
> +scalar data types, and the name and type otherwise.  If the option
> +@code{--no-frame-filters} is supplied, then Python frame filters will
> +not be executed.
>
>  If the @code{--skip-unavailable} option is specified, local variables
>  and arguments that are not available are not listed.  Partially
> @@ -34029,9 +34036,10 @@ create variable objects for them, if they do not already exist.  With
>  a single argument or if @var{print-values} has a value of 0 or
>  @code{--no-values}, print only the names of the variables; if
>  @var{print-values} is 1 or @code{--all-values}, also print their
> -values; and if it is 2 or @code{--simple-values} print the name and
> -value for simple data types and just the name for arrays, structures
> -and unions.
> +values; if it is 2 or @code{--simple-values} print the name and value
> +for simple data types and just the name for arrays, structures and
> +unions; and if it is 3 or @code{--scalar-values}, print the name and
> +value for scalar data types, and just the name otherwise.
>
>  @var{from} and @var{to}, if specified, indicate the range of children
>  to report.  If @var{from} or @var{to} is less than zero, the range is
> @@ -37295,6 +37303,11 @@ option (@pxref{GDB/MI Program Execution}).
>  @item data-disassemble-a-option
>  Indicates that the @code{-data-disassemble} command supports the @option{-a}
>  option (@pxref{GDB/MI Data Manipulation}).
> +@item scalar-values
> +Indicates that the @code{-stack-list-arguments},
> +@code{-stack-list-locals}, @code{-stack-list-variables}, and
> +@code{-var-list-children} commands support the
> +@option{--scalar-values} option (@pxref{GDB/MI Stack Manipulation}).
>  @end ftable
>
>  @subheading The @code{-list-target-features} Command
> diff --git a/gdb/extension.h b/gdb/extension.h
> index 47839ea50be..16d12f00f41 100644
> --- a/gdb/extension.h
> +++ b/gdb/extension.h
> @@ -121,6 +121,9 @@ enum ext_lang_frame_args
>         arguments when invoked from the MI. */
>      MI_PRINT_SIMPLE_VALUES = PRINT_SIMPLE_VALUES,
>
> +    /* Print only scalar values for arguments when invoked from the MI.  */
> +    MI_PRINT_SCALAR_VALUES = PRINT_SCALAR_VALUES,
> +
>      /* Print only scalar values for arguments when invoked from the CLI. */
>      CLI_SCALAR_VALUES,
>
> diff --git a/gdb/mi/mi-cmd-stack.c b/gdb/mi/mi-cmd-stack.c
> index 0fe204dbc66..43eea32e460 100644
> --- a/gdb/mi/mi-cmd-stack.c
> +++ b/gdb/mi/mi-cmd-stack.c
> @@ -494,6 +494,7 @@ list_arg_or_local (const struct frame_arg *arg, enum what_to_list what,
>    gdb_assert ((values == PRINT_NO_VALUES && arg->val == NULL
>                && arg->error == NULL)
>               || values == PRINT_SIMPLE_VALUES
> +             || values == PRINT_SCALAR_VALUES
>               || (values == PRINT_ALL_VALUES
>                   && (arg->val != NULL || arg->error != NULL)));
>    gdb_assert (arg->entry_kind == print_entry_values_no
> @@ -525,7 +526,8 @@ list_arg_or_local (const struct frame_arg *arg, enum what_to_list what,
>    if (what == all && arg->sym->is_argument ())
>      uiout->field_signed ("arg", 1);
>
> -  if (values == PRINT_SIMPLE_VALUES)
> +  if (values == PRINT_SIMPLE_VALUES
> +      || values == PRINT_SCALAR_VALUES)
>      {
>        check_typedef (arg->sym->type ());
>        type_print (arg->sym->type (), "", &stb, -1);
> @@ -571,7 +573,6 @@ list_args_or_locals (const frame_print_options &fp_opts,
>    const struct block *block;
>    struct symbol *sym;
>    struct block_iterator iter;
> -  struct type *type;
>    const char *name_of_result;
>    struct ui_out *uiout = current_uiout;
>
> @@ -647,21 +648,12 @@ list_args_or_locals (const frame_print_options &fp_opts,
>               entryarg.sym = sym2;
>               entryarg.entry_kind = print_entry_values_no;
>
> -             switch (values)
> +             if (mi_print_type_p (sym->type (), values))
>                 {
> -               case PRINT_SIMPLE_VALUES:
> -                 type = check_typedef (sym2->type ());
> -                 if (type->code () != TYPE_CODE_ARRAY
> -                     && type->code () != TYPE_CODE_STRUCT
> -                     && type->code () != TYPE_CODE_UNION)
> -                   {
> -               case PRINT_ALL_VALUES:
>                   if (sym->is_argument ())
>                     read_frame_arg (fp_opts, sym2, fi, &arg, &entryarg);
>                   else
>                     read_frame_local (sym2, fi, &arg);
> -                   }
> -                 break;
>                 }
>
>               if (arg.entry_kind != print_entry_values_only)
> diff --git a/gdb/mi/mi-cmd-var.c b/gdb/mi/mi-cmd-var.c
> index 3db09cf7815..1d4d3ec8534 100644
> --- a/gdb/mi/mi-cmd-var.c
> +++ b/gdb/mi/mi-cmd-var.c
> @@ -32,6 +32,7 @@
>  #include "mi-parse.h"
>  #include "gdbsupport/gdb_optional.h"
>  #include "inferior.h"
> +#include "valprint.h"
>
>  static void varobj_update_one (struct varobj *var,
>                                enum print_values print_values,
> @@ -314,6 +315,40 @@ mi_cmd_var_info_num_children (const char *command, char **argv, int argc)
>    uiout->field_signed ("numchild", varobj_get_num_children (var));
>  }
>
> +/* See mi-cmds.h.  */
> +
> +bool
> +mi_simple_type_p (struct type *type)
> +{
> +  type = check_typedef (type);
> +  switch (type->code ())
> +    {
> +    case TYPE_CODE_ARRAY:
> +    case TYPE_CODE_STRUCT:
> +    case TYPE_CODE_UNION:
> +      return false;
> +    default:
> +      return true;
> +    }
> +}
> +
> +bool
> +mi_print_type_p (struct type *type, enum print_values print_values)
> +{
> +  switch (print_values)
> +    {
> +    default:
> +    case PRINT_NO_VALUES:
> +      return false;
> +    case PRINT_ALL_VALUES:
> +      return true;
> +    case PRINT_SIMPLE_VALUES:
> +      return mi_simple_type_p (type);
> +    case PRINT_SCALAR_VALUES:
> +      return val_print_scalar_type_p (type);
> +    }
> +}
> +
>  /* Return 1 if given the argument PRINT_VALUES we should display
>     the varobj VAR.  */
>
> @@ -335,15 +370,7 @@ mi_print_value_p (struct varobj *var, enum print_values print_values)
>    if (type == NULL)
>      return 1;
>    else
> -    {
> -      type = check_typedef (type);
> -
> -      /* For PRINT_SIMPLE_VALUES, only print the value if it has a type
> -        and that type is not a compound type.  */
> -      return (type->code () != TYPE_CODE_ARRAY
> -             && type->code () != TYPE_CODE_STRUCT
> -             && type->code () != TYPE_CODE_UNION);
> -    }
> +    return mi_print_type_p (type, print_values);
>  }
>
>  void
> diff --git a/gdb/mi/mi-cmds.h b/gdb/mi/mi-cmds.h
> index 9ffb11bf997..3a5b6b72be9 100644
> --- a/gdb/mi/mi-cmds.h
> +++ b/gdb/mi/mi-cmds.h
> @@ -29,7 +29,8 @@
>  enum print_values {
>     PRINT_NO_VALUES,
>     PRINT_ALL_VALUES,
> -   PRINT_SIMPLE_VALUES
> +   PRINT_SIMPLE_VALUES,
> +   PRINT_SCALAR_VALUES
>  };
>
>  typedef void (mi_cmd_argv_ftype) (const char *command, char **argv, int argc);
> @@ -226,4 +227,18 @@ using remove_mi_cmd_entries_ftype
>    = gdb::function_view<bool (mi_command *)>;
>  extern void remove_mi_cmd_entries (remove_mi_cmd_entries_ftype callback);
>
> +/* Return true if TYPE is suitable for printing with PRINT_SIMPLE_VALUES: that
> +   is, if TYPE is not an array, structure or union.
> +
> +   Note that reference types are always considered simple by this function, even
> +   if the referenced type is non-scalar.  This behaviour is retained for backwards
> +   compatibility, and PRINT_SCALAR_VALUES may be used instead to avoid printing
> +   references to non-scalar values.  */
> +
> +extern bool mi_simple_type_p (struct type *type);
> +
> +/* Return true if TYPE is suitable for printing with PRINT_VALUES.  */
> +
> +extern bool mi_print_type_p (struct type *type, enum print_values values);
> +
>  #endif /* MI_MI_CMDS_H */
> diff --git a/gdb/mi/mi-main.c b/gdb/mi/mi-main.c
> index b758f398e2a..9bb00390370 100644
> --- a/gdb/mi/mi-main.c
> +++ b/gdb/mi/mi-main.c
> @@ -1663,6 +1663,7 @@ mi_cmd_list_features (const char *command, char **argv, int argc)
>        uiout->field_string (NULL, "undefined-command-error-code");
>        uiout->field_string (NULL, "exec-run-start-option");
>        uiout->field_string (NULL, "data-disassemble-a-option");
> +      uiout->field_string (NULL, "scalar-values");
>
>        if (ext_lang_initialized_p (get_ext_lang_defn (EXT_LANG_PYTHON)))
>         uiout->field_string (NULL, "python");
> @@ -2462,14 +2463,14 @@ static void
>  print_variable_or_computed (const char *expression, enum print_values values)
>  {
>    struct value *val;
> -  struct type *type;
>    struct ui_out *uiout = current_uiout;
>
>    string_file stb;
>
>    expression_up expr = parse_expression (expression);
>
> -  if (values == PRINT_SIMPLE_VALUES)
> +  if (values == PRINT_SIMPLE_VALUES
> +      || values == PRINT_SCALAR_VALUES)
>      val = evaluate_type (expr.get ());
>    else
>      val = evaluate_expression (expr.get ());
> @@ -2482,31 +2483,19 @@ print_variable_or_computed (const char *expression, enum print_values values)
>    switch (values)
>      {
>      case PRINT_SIMPLE_VALUES:
> -      type = check_typedef (value_type (val));
> +    case PRINT_SCALAR_VALUES:
>        type_print (value_type (val), "", &stb, -1);
>        uiout->field_stream ("type", stb);
> -      if (type->code () != TYPE_CODE_ARRAY
> -         && type->code () != TYPE_CODE_STRUCT
> -         && type->code () != TYPE_CODE_UNION)
> -       {
> -         struct value_print_options opts;
> -
> -         get_no_prettyformat_print_options (&opts);
> -         opts.deref_ref = 1;
> -         common_val_print (val, &stb, 0, &opts, current_language);
> -         uiout->field_stream ("value", stb);
> -       }
>        break;
> -    case PRINT_ALL_VALUES:
> -      {
> -       struct value_print_options opts;
> +    }
>
> -       get_no_prettyformat_print_options (&opts);
> -       opts.deref_ref = 1;
> -       common_val_print (val, &stb, 0, &opts, current_language);
> -       uiout->field_stream ("value", stb);
> -      }
> -      break;
> +  if (mi_print_type_p (value_type (val), values))
> +    {
> +      struct value_print_options opts;
> +      get_no_prettyformat_print_options (&opts);
> +      opts.deref_ref = 1;
> +      common_val_print (val, &stb, 0, &opts, current_language);
> +      uiout->field_stream ("value", stb);
>      }
>  }
>
> diff --git a/gdb/mi/mi-parse.c b/gdb/mi/mi-parse.c
> index dfa7b462714..dd70e4648a1 100644
> --- a/gdb/mi/mi-parse.c
> +++ b/gdb/mi/mi-parse.c
> @@ -29,6 +29,7 @@
>  #include "language.h"
>
>  static const char mi_no_values[] = "--no-values";
> +static const char mi_scalar_values[] = "--scalar-values";
>  static const char mi_simple_values[] = "--simple-values";
>  static const char mi_all_values[] = "--all-values";
>
> @@ -383,8 +384,11 @@ mi_parse_print_values (const char *name)
>     else if (strcmp (name, "2") == 0
>             || strcmp (name, mi_simple_values) == 0)
>       return PRINT_SIMPLE_VALUES;
> +   else if (strcmp (name, "3") == 0
> +           || strcmp (name, mi_scalar_values) == 0)
> +     return PRINT_SCALAR_VALUES;
>     else
>       error (_("Unknown value for PRINT_VALUES: must be: \
> -0 or \"%s\", 1 or \"%s\", 2 or \"%s\""),
> -           mi_no_values, mi_all_values, mi_simple_values);
> +0 or \"%s\", 1 or \"%s\", 2 or \"%s\", 3 or \"%s\""),
> +           mi_no_values, mi_all_values, mi_simple_values, mi_scalar_values);
>  }
> diff --git a/gdb/python/py-framefilter.c b/gdb/python/py-framefilter.c
> index 366f3745b9d..e295036f46e 100644
> --- a/gdb/python/py-framefilter.c
> +++ b/gdb/python/py-framefilter.c
> @@ -227,26 +227,27 @@ py_print_value (struct ui_out *out, struct value *val,
>                 enum ext_lang_frame_args args_type,
>                 const struct language_defn *language)
>  {
> -  int should_print = 0;
> +  int should_print;
>
>    /* MI does not print certain values, differentiated by type,
>       depending on what ARGS_TYPE indicates.  Test type against option.
>       For CLI print all values.  */
> -  if (args_type == MI_PRINT_SIMPLE_VALUES
> -      || args_type == MI_PRINT_ALL_VALUES)
> +  switch (args_type)
>      {
> -      struct type *type = check_typedef (value_type (val));
> -
> -      if (args_type == MI_PRINT_ALL_VALUES)
> -       should_print = 1;
> -      else if (args_type == MI_PRINT_SIMPLE_VALUES
> -              && type->code () != TYPE_CODE_ARRAY
> -              && type->code () != TYPE_CODE_STRUCT
> -              && type->code () != TYPE_CODE_UNION)
> -       should_print = 1;
> +    case NO_VALUES:
> +      should_print = 0;
> +      break;
> +    default:
> +    case MI_PRINT_ALL_VALUES:
> +      should_print = 1;
> +      break;
> +    case MI_PRINT_SIMPLE_VALUES:
> +      should_print = mi_print_type_p (value_type (val), PRINT_SIMPLE_VALUES);
> +      break;
> +    case MI_PRINT_SCALAR_VALUES:
> +      should_print = mi_print_type_p (value_type (val), PRINT_SCALAR_VALUES);
> +      break;
>      }
> -  else if (args_type != NO_VALUES)
> -    should_print = 1;
>
>    if (should_print)
>      {
> @@ -371,10 +372,12 @@ py_print_single_arg (struct ui_out *out,
>    if (print_args_field)
>      out->field_signed ("arg", 1);
>
> -  /* For MI print the type, but only for simple values.  This seems
> -     weird, but this is how MI choose to format the various output
> +  /* For MI print the type, but only for simple and scalar values. This
> +     seems weird, but this is how MI chooses to format the various output
>       types.  */
> -  if (args_type == MI_PRINT_SIMPLE_VALUES && val != NULL)
> +  if ((args_type == MI_PRINT_SIMPLE_VALUES
> +       || args_type == MI_PRINT_SCALAR_VALUES)
> +      && val != NULL)
>      py_print_type (out, val);
>
>    if (val != NULL)
> @@ -603,7 +606,8 @@ enumerate_locals (PyObject *iter,
>        out->field_string ("name", sym_name.get ());
>        out->text (" = ");
>
> -      if (args_type == MI_PRINT_SIMPLE_VALUES)
> +      if (args_type == MI_PRINT_SIMPLE_VALUES
> +          || args_type == MI_PRINT_SCALAR_VALUES)
>         py_print_type (out, val);
>
>        /* CLI always prints values for locals.  MI uses the
> diff --git a/gdb/testsuite/gdb.mi/mi-stack.exp b/gdb/testsuite/gdb.mi/mi-stack.exp
> index d04c8153c65..2c74da00c18 100644
> --- a/gdb/testsuite/gdb.mi/mi-stack.exp
> +++ b/gdb/testsuite/gdb.mi/mi-stack.exp
> @@ -93,6 +93,11 @@ proc test_stack_args_listing {} {
>      # -stack-list-arguments 1 1 1
>      # -stack-list-arguments 1 1 3
>      # -stack-list-arguments
> +    # -stack-list-arguments 1 1 300
> +    # -stack-list-arguments 2 1 1
> +    # -stack-list-arguments --simple-values 1 1
> +    # -stack-list-arguments 3 1 1
> +    # -stack-list-arguments --scalar-values 1 1
>
>      mi_gdb_test "231-stack-list-arguments 0" \
>         "231\\^done,stack-args=\\\[frame=\{level=\"0\",args=\\\[\\\]\},frame=\{level=\"1\",args=\\\[name=\"strarg\"\\\]\},frame=\{level=\"2\",args=\\\[name=\"intarg\",name=\"strarg\"\\\]\},frame=\{level=\"3\",args=\\\[name=\"intarg\",name=\"strarg\",name=\"fltarg\"\\\]\},frame=\{level=\"4\",args=\\\[\\\]\}\\\]" \
> @@ -125,6 +130,22 @@ proc test_stack_args_listing {} {
>      mi_gdb_test "235-stack-list-arguments 1 1 300" \
>         "235\\^done,stack-args=\\\[frame=\{level=\"1\",args=\\\[\{name=\"strarg\",value=\"$hex \\\\\"A string argument.\\\\\"\"\}\\\]\},frame=\{level=\"2\",args=\\\[\{name=\"intarg\",value=\"2\"\},\{name=\"strarg\",value=\"$hex \\\\\"A string argument.\\\\\"\"\}\\\]\},frame=\{level=\"3\",args=\\\[\{name=\"intarg\",value=\"2\"\},\{name=\"strarg\",value=\"$hex \\\\\"A string argument.\\\\\"\"\},\{name=\"fltarg\",value=\"3.5\"\}\\\]\},frame=\{level=\"4\",args=\\\[\\\]\}\\\]" \
>         "stack args listing 1 1 300"
> +
> +    mi_gdb_test "236-stack-list-arguments 2 1 1" \
> +       "236\\^done,stack-args=\\\[frame=\\{level=\"1\",args=\\\[\\{name=\"strarg\",type=\"char \\*\",value=\"$hex \\\\\"A string argument.\\\\\"\"\\}\\\]\\}\\\]" \
> +       "stack args listing 2 1 1"
> +
> +    mi_gdb_test "237-stack-list-arguments --simple-values 1 1" \
> +       "237\\^done,stack-args=\\\[frame=\\{level=\"1\",args=\\\[\\{name=\"strarg\",type=\"char \\*\",value=\"$hex \\\\\"A string argument.\\\\\"\"\\}\\\]\\}\\\]" \
> +       "stack args listing --simple-values 1 1"
> +
> +    mi_gdb_test "238-stack-list-arguments 3 1 1" \
> +       "238\\^done,stack-args=\\\[frame=\\{level=\"1\",args=\\\[\\{name=\"strarg\",type=\"char \\*\",value=\"$hex \\\\\"A string argument.\\\\\"\"\\}\\\]\\}\\\]" \
> +       "stack args listing 3 1 1"
> +
> +    mi_gdb_test "239-stack-list-arguments --scalar-values 1 1" \
> +       "239\\^done,stack-args=\\\[frame=\\{level=\"1\",args=\\\[\\{name=\"strarg\",type=\"char \\*\",value=\"$hex \\\\\"A string argument.\\\\\"\"\\}\\\]\\}\\\]" \
> +       "stack args listing --scalar-values 1 1"
>  }
>
>  proc test_stack_info_depth {} {
> @@ -163,7 +184,7 @@ proc test_stack_locals_listing {} {
>      # -stack-list-locals 0 (--no-values)
>      # -stack-list-locals 1 (--all-values)
>      # -stack-list-locals 2 (--simple-values)
> -    # -stack-list-arguments
> +    # -stack-list-locals 3 (--scalar-values)
>
>      mi_gdb_test "232-stack-list-locals 0" \
>         "232\\^done,locals=\\\[name=\"A\",name=\"B\",name=\"C\",name=\"D\"\\\]" \
> @@ -179,10 +200,22 @@ proc test_stack_locals_listing {} {
>         "232\\^done,locals=\\\[\{name=\"A\",value=\"1\"\},\{name=\"B\",value=\"2\"\},\{name=\"C\",value=\"3\"\},\{name=\"D\",value=\"\\{0, 1, 2\\}\"\}\\\]" \
>         "stack locals listing of names and values"
>
> -    mi_gdb_test "232-stack-list-locals --simple-values" \
> +    mi_gdb_test "232-stack-list-locals 2" \
>         "232\\^done,locals=\\\[\{name=\"A\",type=\"int\",value=\"1\"\},\{name=\"B\",type=\"int\",value=\"2\"\},\{name=\"C\",type=\"int\",value=\"3\"\},\{name=\"D\",type=\"int \\\[3\\\]\"\}\\\]" \
>         "stack locals listing, simple types: names and values, complex type: names and types"
>
> +    mi_gdb_test "232-stack-list-locals --simple-values" \
> +       "232\\^done,locals=\\\[\\{name=\"A\",type=\"int\",value=\"1\"\\},\\{name=\"B\",type=\"int\",value=\"2\"\\},\\{name=\"C\",type=\"int\",value=\"3\"\\},\\{name=\"D\",type=\"int \\\[3\\\]\"\\}\\\]" \
> +       "stack locals listing with --simple-values"
> +
> +    mi_gdb_test "233-stack-list-locals 3" \
> +       "233\\^done,locals=\\\[\\{name=\"A\",type=\"int\",value=\"1\"\\},\\{name=\"B\",type=\"int\",value=\"2\"\\},\\{name=\"C\",type=\"int\",value=\"3\"\\},\\{name=\"D\",type=\"int \\\[3\\\]\"\\}\\\]" \
> +       "stack locals listing, scalar types: names and values, otherwise: names and types"
> +
> +    mi_gdb_test "233-stack-list-locals --scalar-values" \
> +       "233\\^done,locals=\\\[\\{name=\"A\",type=\"int\",value=\"1\"\\},\\{name=\"B\",type=\"int\",value=\"2\"\\},\\{name=\"C\",type=\"int\",value=\"3\"\\},\\{name=\"D\",type=\"int \\\[3\\\]\"\\}\\\]" \
> +       "stack locals listing with --scalar-values"
> +
>      mi_gdb_test "234-stack-list-locals" \
>         "234\\^error,msg=\"-stack-list-locals: Usage.*PRINT_VALUES.*\"" \
>         "stack locals listing wrong"
> diff --git a/gdb/testsuite/gdb.mi/print-values.cc b/gdb/testsuite/gdb.mi/print-values.cc
> new file mode 100644
> index 00000000000..b52683d1537
> --- /dev/null
> +++ b/gdb/testsuite/gdb.mi/print-values.cc
> @@ -0,0 +1,63 @@
> +/* This test case is part of GDB, the GNU debugger.
> +
> +   Copyright 2022 Free Software Foundation, Inc.
> +
> +   This program is free software; you can redistribute it and/or modify
> +   it under the terms of the GNU General Public License as published by
> +   the Free Software Foundation; either version 3 of the License, or
> +   (at your option) any later version.
> +
> +   This program is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> +   GNU General Public License for more details.
> +
> +   You should have received a copy of the GNU General Public License
> +   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
> +
> +/* Test program for PRINT_SIMPLE_VALUES and PRINT_SCALAR_VALUES.
> +
> +   In the function f:
> +
> +   * The arguments i, ir, and irr are ints or references to ints,
> +     which must be printed by both PRINT_SIMPLE_VALUES and
> +     PRINT_SCALAR_VALUES.
> +
> +   * The arguments a, s, and u are non-scalar values, which must not
> +     be printed by either PRINT_SIMPLE_VALUES or PRINT_SCALAR_VALUES.
> +
> +   * The arguments ar, arr, sr, srr, ur, and urr are references to
> +     non-scalar values, which must be printed by PRINT_SIMPLE_VALUES
> +     but not printed by PRINT_SCALAR_VALUES.  */
> +
> +struct s
> +{
> +  int v;
> +};
> +
> +union u
> +{
> +  int v;
> +};
> +
> +int
> +f (int i, int &ir, int &&irr,
> +   int a[1], int (&ar)[1], int (&&arr)[1],
> +   struct s s, struct s &sr, struct s &&srr,
> +   union u u, union u &ur, union u &&urr)
> +{
> +  return (i + ir + irr
> +          + a[0] + ar[0] + arr[0]
> +          + s.v + sr.v + srr.v
> +          + u.v + ur.v + urr.v);
> +}
> +
> +int
> +main (void)
> +{
> +  int i = 1, j = 2;
> +  int a[1] = { 4 }, b[1] = { 5 };
> +  struct s s = { 7 }, t = { 8 };
> +  union u u = { 10 }, v = { 11 };
> +  return f (i, j, 3, a, b, { 6 }, s, t, { 9 }, u, v, { 12 });
> +}
> diff --git a/gdb/testsuite/gdb.mi/print-values.exp b/gdb/testsuite/gdb.mi/print-values.exp
> new file mode 100644
> index 00000000000..7896d773119
> --- /dev/null
> +++ b/gdb/testsuite/gdb.mi/print-values.exp
> @@ -0,0 +1,53 @@
> +# Copyright 2022 Free Software Foundation, Inc.
> +#
> +# This program is free software; you can redistribute it and/or modify
> +# it under the terms of the GNU General Public License as published by
> +# the Free Software Foundation; either version 3 of the License, or
> +# (at your option) any later version.
> +#
> +# This program is distributed in the hope that it will be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> +# GNU General Public License for more details.
> +#
> +# You should have received a copy of the GNU General Public License
> +# along with this program.  If not, see <http://www.gnu.org/licenses/>.
> +
> +# Test of PRINT_SIMPLE_VALUES and PRINT_SCALAR_VALUES.
> +#
> +# Test that PRINT_SIMPLE_VALUES distinguishes scalar and non-scalar
> +# types, except for C++ reference and rvalue reference types.
> +#
> +# Test that PRINT_SCALAR_VALUES distinguishes scalar and non-scalar
> +# types, including C++ reference and rvalue reference types.
> +
> +if { [skip_cplus_tests] } { continue }
> +
> +load_lib mi-support.exp
> +standard_testfile .cc
> +
> +if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile executable {debug c++}] != "" } {
> +    untested "failed to compile"
> +    return -1
> +}
> +
> +mi_clean_restart $binfile
> +
> +mi_runto_main
> +
> +mi_gdb_test "-break-insert f" "\\^done.*" "set breakpoint on f"
> +
> +mi_send_resuming_command "exec-continue" "exec-continue to breakpoint on f"
> +
> +mi_expect_stop "breakpoint-hit" "f" ".*" ".*" ".*" {.* disp="keep"} \
> +    "run until breakpoint on f"
> +
> +mi_gdb_test "-stack-list-arguments --simple-values" \
> +    "\\^done,stack-args=\\\[frame=\\{level=\"0\",args=\\\[\\{name=\"i\",type=\"int\",value=\"1\"\\},\\{name=\"ir\",type=\"int &\",value=\"@$hex: 2\"\\},\\{name=\"irr\",type=\"int &&\",value=\"@$hex: 3\"\\},\\{name=\"a\",type=\"int \\*\",value=\"$hex\"\\},\\{name=\"ar\",type=\"int \\(&\\)\\\[1\\\]\",value=\"@$hex: \\{5\\}\"\\},\\{name=\"arr\",type=\"int \\(&&\\)\\\[1\\\]\",value=\"@$hex: \\{6\\}\"\\},\\{name=\"s\",type=\"s\"\\},\\{name=\"sr\",type=\"s &\",value=\"@$hex: \\{v = 8\\}\"\\},\\{name=\"srr\",type=\"s &&\",value=\"@$hex: \\{v = 9\\}\"\\},\\{name=\"u\",type=\"u\"\\},\\{name=\"ur\",type=\"u &\",value=\"@$hex: \\{v = 11\\}\"\\},\\{name=\"urr\",type=\"u &&\",value=\"@$hex: \\{v = 12\\}\"\\}\\\]\\},frame=\\{level=\"1\",args=\\\[\\\]\\}\\\]" \
> +    "stack list arguments, simple types: names, types and values, otherwise: names and types"
> +
> +mi_gdb_test "-stack-list-arguments --scalar-values" \
> +    "\\^done,stack-args=\\\[frame=\\{level=\"0\",args=\\\[\\{name=\"i\",type=\"int\",value=\"1\"\\},\\{name=\"ir\",type=\"int &\",value=\"@$hex: 2\"\\},\\{name=\"irr\",type=\"int &&\",value=\"@$hex: 3\"\\},\\{name=\"a\",type=\"int \\*\",value=\"$hex\"\\},\\{name=\"ar\",type=\"int \\(&\\)\\\[1\\\]\"\\},\\{name=\"arr\",type=\"int \\(&&\\)\\\[1\\\]\"\\},\\{name=\"s\",type=\"s\"\\},\\{name=\"sr\",type=\"s &\"\\},\\{name=\"srr\",type=\"s &&\"\\},\\{name=\"u\",type=\"u\"\\},\\{name=\"ur\",type=\"u &\"\\},\\{name=\"urr\",type=\"u &&\"\\}\\\]\\},frame=\\{level=\"1\",args=\\\[\\\]\\}\\\]" \
> +    "stack list arguments, scalar types: names, types and values, compound types: names and types"
> +
> +mi_gdb_exit
> diff --git a/gdb/testsuite/gdb.python/py-framefilter-mi.exp b/gdb/testsuite/gdb.python/py-framefilter-mi.exp
> index 344067fe4a7..fa4e559e343 100644
> --- a/gdb/testsuite/gdb.python/py-framefilter-mi.exp
> +++ b/gdb/testsuite/gdb.python/py-framefilter-mi.exp
> @@ -120,6 +120,14 @@ mi_gdb_test "-stack-list-arguments --no-frame-filters 2" \
>      "\\^done,stack-args=\\\[frame={level=\"0\",args=\\\[{name=\"foo\",type=\"int\",value=\"21\"},{name=\"bar\",type=\"char \\\*\",value=\"$hex \\\\\"Param\\\\\"\"},{name=\"fb\",type=\"foobar \\\*\",value=\"$hex\"},{name=\"bf\",type=\"foobar\"}\\\]},frame={level=\"1\",args=\\\[\\\]},frame={level=\"2\",args=\\\[{name=\"j\",type=\"int\",value=\"10\"}\\\]},.*frame={level=\"22\",args=\\\[\\\]},.*frame={level=\"26\",args=\\\[{name=\"f\",type=\"int\",value=\"3\"},{name=\"d\",type=\"int\",value=\"5\"}\\\]},frame={level=\"27\",args=\\\[\\\]}\\\]" \
>      "stack-list-arguments --no-frame-filters 2"
>
> +mi_gdb_test "-stack-list-arguments 3" \
> +    "\\^done,stack-args=\\\[frame={level=\"0\",args=\\\[{name=\"foo\",type=\"int\",value=\"21\"},{name=\"bar\",type=\"char \\\*\",value=\"$hex \\\\\"Param\\\\\"\"},{name=\"fb\",type=\"foobar \\\*\",value=\"$hex\"},{name=\"bf\",type=\"foobar\"\}\\\]},frame={level=\"1\",args=\\\[\\\]},frame={level=\"2\",args=\\\[{name=\"j\",type=\"int\",value=\"10\"}\\\]},.*frame={level=\"22\",args=\\\[\\\],children=\\\[frame={level=\"23\",args=\\\[\\\]}\\\]},.*frame={level=\"26\",args=\\\[{name=\"f\",type=\"int\",value=\"3\"},{name=\"d\",type=\"int\",value=\"5\"}\\\]},frame={level=\"27\",args=\\\[\\\]}\\\]" \
> +    "stack-list-arguments 3"
> +
> +mi_gdb_test "-stack-list-arguments --no-frame-filters 3" \
> +    "\\^done,stack-args=\\\[frame={level=\"0\",args=\\\[{name=\"foo\",type=\"int\",value=\"21\"},{name=\"bar\",type=\"char \\\*\",value=\"$hex \\\\\"Param\\\\\"\"},{name=\"fb\",type=\"foobar \\\*\",value=\"$hex\"},{name=\"bf\",type=\"foobar\"}\\\]},frame={level=\"1\",args=\\\[\\\]},frame={level=\"2\",args=\\\[{name=\"j\",type=\"int\",value=\"10\"}\\\]},.*frame={level=\"22\",args=\\\[\\\]},.*frame={level=\"26\",args=\\\[{name=\"f\",type=\"int\",value=\"3\"},{name=\"d\",type=\"int\",value=\"5\"}\\\]},frame={level=\"27\",args=\\\[\\\]}\\\]" \
> +    "stack-list-arguments --no-frame-filters 3"
> +
>
>  mi_gdb_test "-stack-list-arguments 2 0 3" \
>      "\\^done,stack-args=\\\[frame={level=\"0\",args=\\\[{name=\"foo\",type=\"int\",value=\"21\"},{name=\"bar\",type=\"char \\\*\",value=\"$hex \\\\\"Param\\\\\"\"},{name=\"fb\",type=\"foobar \\\*\",value=\"$hex\"},{name=\"bf\",type=\"foobar\"}\\\]},frame={level=\"1\",args=\\\[\\\]},frame={level=\"2\",args=\\\[{name=\"j\",type=\"int\",value=\"10\"}\\\]},frame={level=\"3\",args=\\\[\\\]}\\\]" \
> @@ -133,6 +141,14 @@ mi_gdb_test "-stack-list-arguments --no-frame-filters 2 22 27" \
>      "\\^done,stack-args=\\\[frame={level=\"22\",args=\\\[\\\]},frame={level=\"23\",args=\\\[\\\]},.*frame={level=\"26\",args=\\\[{name=\"f\",type=\"int\",value=\"3\"},{name=\"d\",type=\"int\",value=\"5\"}\\\]},frame={level=\"27\",args=\\\[\\\]}\\\]" \
>      "stack-list-arguments --no-frame-filters 2 22 27"
>
> +mi_gdb_test "-stack-list-arguments 3 22 27" \
> +    "\\^done,stack-args=\\\[frame={level=\"22\",args=\\\[\\\],children=\\\[frame={level=\"23\",args=\\\[\\\]}\\\]},.*frame={level=\"26\",args=\\\[{name=\"f\",type=\"int\",value=\"3\"},{name=\"d\",type=\"int\",value=\"5\"}\\\]},frame={level=\"27\",args=\\\[\\\]}\\\]" \
> +    "stack-list-arguments 3 22 27"
> +
> +mi_gdb_test "-stack-list-arguments --no-frame-filters 3 22 27" \
> +    "\\^done,stack-args=\\\[frame={level=\"22\",args=\\\[\\\]},frame={level=\"23\",args=\\\[\\\]},.*frame={level=\"26\",args=\\\[{name=\"f\",type=\"int\",value=\"3\"},{name=\"d\",type=\"int\",value=\"5\"}\\\]},frame={level=\"27\",args=\\\[\\\]}\\\]" \
> +    "stack-list-arguments --no-frame-filters 3 22 27"
> +
>  #stack-list-locals
>  mi_gdb_test "-stack-list-locals --no-frame-filters 0" \
>      "\\^done,locals=\\\[name=\"str\",name=\"st2\",name=\"b\",name=\"c\"\\\]" \
> @@ -146,6 +162,10 @@ mi_gdb_test "-stack-list-locals --no-frame-filters 2" \
>      "\\^done,locals=\\\[{name=\"str\",type=\"const char \\\*\",value=\"$hex \\\\\"The End\\\\\"\"},{name=\"st2\",type=\"const char \\\*\",value=\"$hex \\\\\"Is Near\\\\\"\"},{name=\"b\",type=\"int\",value=\"12\"},{name=\"c\",type=\"short\",value=\"5\"}\\\]" \
>      "stack-list-locals --no-frame-filters 2"
>
> +mi_gdb_test "-stack-list-locals --no-frame-filters 3" \
> +    "\\^done,locals=\\\[{name=\"str\",type=\"const char \\\*\",value=\"$hex \\\\\"The End\\\\\"\"},{name=\"st2\",type=\"const char \\\*\",value=\"$hex \\\\\"Is Near\\\\\"\"},{name=\"b\",type=\"int\",value=\"12\"},{name=\"c\",type=\"short\",value=\"5\"}\\\]" \
> +    "stack-list-locals --no-frame-filters 3"
> +
>  mi_gdb_test "-stack-list-locals --no-frame-filters --no-values" \
>      "\\^done,locals=\\\[name=\"str\",name=\"st2\",name=\"b\",name=\"c\"\\\]" \
>      "stack-list-locals --no-frame-filters --no-values"
> @@ -158,6 +178,10 @@ mi_gdb_test "-stack-list-locals --no-frame-filters --simple-values" \
>      "\\^done,locals=\\\[{name=\"str\",type=\"const char \\\*\",value=\"$hex \\\\\"The End\\\\\"\"},{name=\"st2\",type=\"const char \\\*\",value=\"$hex \\\\\"Is Near\\\\\"\"},{name=\"b\",type=\"int\",value=\"12\"},{name=\"c\",type=\"short\",value=\"5\"}\\\]" \
>      "stack-list-locals --no-frame-filters --simple-values"
>
> +mi_gdb_test "-stack-list-locals --no-frame-filters --scalar-values" \
> +    "\\^done,locals=\\\[{name=\"str\",type=\"const char \\\*\",value=\"$hex \\\\\"The End\\\\\"\"},{name=\"st2\",type=\"const char \\\*\",value=\"$hex \\\\\"Is Near\\\\\"\"},{name=\"b\",type=\"int\",value=\"12\"},{name=\"c\",type=\"short\",value=\"5\"}\\\]" \
> +    "stack-list-locals --no-frame-filters --scalar-values"
> +
>  mi_gdb_test "-stack-list-locals 0" \
>      "\\^done,locals=\\\[name=\"str\",name=\"st2\",name=\"b\",name=\"c\"\\\]" \
>      "stack-list-locals 0"
> @@ -170,6 +194,10 @@ mi_gdb_test "-stack-list-locals 2" \
>      "\\^done,locals=\\\[{name=\"str\",type=\"const char \\\*\",value=\"$hex \\\\\"The End\\\\\"\"},{name=\"st2\",type=\"const char \\\*\",value=\"$hex \\\\\"Is Near\\\\\"\"},{name=\"b\",type=\"int\",value=\"12\"},{name=\"c\",type=\"short\",value=\"5\"}\\\]" \
>      "stack-list-locals 2"
>
> +mi_gdb_test "-stack-list-locals 3" \
> +    "\\^done,locals=\\\[{name=\"str\",type=\"const char \\\*\",value=\"$hex \\\\\"The End\\\\\"\"},{name=\"st2\",type=\"const char \\\*\",value=\"$hex \\\\\"Is Near\\\\\"\"},{name=\"b\",type=\"int\",value=\"12\"},{name=\"c\",type=\"short\",value=\"5\"}\\\]" \
> +    "stack-list-locals 3"
> +
>  # stack-list-variables
>  mi_gdb_test "-stack-list-variables --no-frame-filters 0" \
>      "\\^done,variables=\\\[{name=\"foo\",arg=\"1\"},{name=\"bar\",arg=\"1\"},{name=\"fb\",arg=\"1\"},{name=\"bf\",arg=\"1\"},{name=\"str\"},{name=\"st2\"},{name=\"b\"},{name=\"c\"}\\\]" \
> --
> 2.26.0
>