2010-04-14 Phil Muldoon <pmuldoon@redhat.com>
PR python/11381 * python/py-prettyprint.c (pretty_print_one_value): Test for Py_None. (print_string_repr): Test for Py_None. Set flags accordingly. Return value depending on return type. (print_children): Take a value indicating whether data was printed before this function was called. Alter output accordingly. (apply_val_pretty_printer): Capture return value from print_string_repr and pass to print_children. 2010-04-14 Phil Muldoon <pmuldoon@redhat.com> * gdb.python/py-prettyprint.py (NoStringContainerPrinter): New printer. * gdb.python/py-prettyprint.c: Add justchildren struct, typedefs. * gdb.python/py-prettyprint.exp: New test for to_string returning None. * gdb.python/py-mi.exp: New test for to_string returning None. 2010-04-14 Phil Muldoon <pmuldoon@redhat.com> * gdb.texinfo (Pretty Printing): Document behaviour when to_string returns None.
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Phil Muldoon
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@ -1,3 +1,16 @@
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2010-04-14 Phil Muldoon <pmuldoon@redhat.com>
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PR python/11381
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* python/py-prettyprint.c (pretty_print_one_value): Test for
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Py_None.
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(print_string_repr): Test for Py_None. Set flags accordingly.
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Return value depending on return type.
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(print_children): Take a value indicating whether data was printed
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before this function was called. Alter output accordingly.
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(apply_val_pretty_printer): Capture return value from
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print_string_repr and pass to print_children.
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2010-04-13 Mark Kettenis <kettenis@gnu.org>
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PR corefiles/11481
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@ -1,3 +1,8 @@
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2010-04-14 Phil Muldoon <pmuldoon@redhat.com>
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* gdb.texinfo (Pretty Printing): Document behaviour when to_string
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returns None.
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2010-04-09 Stan Shebs <stan@codesourcery.com>
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* gdb.texinfo (gdb/mi Tracepoint Commands) <-trace-status>:
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@ -20435,6 +20435,9 @@ the resulting value. Again, this may result in a call to another
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pretty-printer. Python scalars (integers, floats, and booleans) and
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strings are convertible to @code{gdb.Value}; other types are not.
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Finally, if this method returns @code{None} then no further operations
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are peformed in this method and nothing is printed.
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If the result is not one of these types, an exception is raised.
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@end defop
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@ -125,9 +125,12 @@ find_pretty_printer (PyObject *value)
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/* Pretty-print a single value, via the printer object PRINTER.
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If the function returns a string, a PyObject containing the string
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is returned. Otherwise, if the function returns a value,
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*OUT_VALUE is set to the value, and NULL is returned. On error,
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*OUT_VALUE is set to NULL, and NULL is returned. */
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is returned. If the function returns Py_NONE that means the pretty
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printer returned the Python None as a value. Otherwise, if the
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function returns a value, *OUT_VALUE is set to the value, and NULL
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is returned. On error, *OUT_VALUE is set to NULL, and NULL is
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returned. */
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static PyObject *
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pretty_print_one_value (PyObject *printer, struct value **out_value)
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{
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@ -140,7 +143,8 @@ pretty_print_one_value (PyObject *printer, struct value **out_value)
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result = PyObject_CallMethodObjArgs (printer, gdbpy_to_string_cst, NULL);
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if (result)
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{
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if (! gdbpy_is_string (result) && ! gdbpy_is_lazy_string (result))
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if (! gdbpy_is_string (result) && ! gdbpy_is_lazy_string (result)
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&& result != Py_None)
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{
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*out_value = convert_value_from_python (result);
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if (PyErr_Occurred ())
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@ -179,8 +183,11 @@ gdbpy_get_display_hint (PyObject *printer)
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}
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/* Helper for apply_val_pretty_printer which calls to_string and
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formats the result. */
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static void
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formats the result. If the value returnd is Py_None, nothing is
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printed and the function returns a 1; in all other cases data is
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printed as given by the pretty printer and the function returns 0.
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*/
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static int
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print_string_repr (PyObject *printer, const char *hint,
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struct ui_file *stream, int recurse,
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const struct value_print_options *options,
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@ -189,9 +196,14 @@ print_string_repr (PyObject *printer, const char *hint,
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{
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struct value *replacement = NULL;
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PyObject *py_str = NULL;
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int is_py_none = 0;
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py_str = pretty_print_one_value (printer, &replacement);
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if (py_str)
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{
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if (py_str == Py_None)
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is_py_none = 1;
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else
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{
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gdb_byte *output = NULL;
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long length;
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@ -236,6 +248,7 @@ print_string_repr (PyObject *printer, const char *hint,
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xfree (encoding);
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Py_DECREF (py_str);
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}
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}
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else if (replacement)
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{
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struct value_print_options opts = *options;
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@ -245,6 +258,8 @@ print_string_repr (PyObject *printer, const char *hint,
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}
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else
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gdbpy_print_stack ();
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return is_py_none;
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}
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static void
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@ -323,12 +338,14 @@ push_dummy_python_frame ()
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}
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/* Helper for apply_val_pretty_printer that formats children of the
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printer, if any exist. */
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printer, if any exist. If is_py_none is true, then nothing has
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been printed by to_string, and format output accordingly. */
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static void
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print_children (PyObject *printer, const char *hint,
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struct ui_file *stream, int recurse,
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const struct value_print_options *options,
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const struct language_defn *language)
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const struct language_defn *language,
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int is_py_none)
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{
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int is_map, is_array, done_flag, pretty;
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unsigned int i;
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@ -408,7 +425,13 @@ print_children (PyObject *printer, const char *hint,
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2. Arrays. Always print a ",".
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3. Other. Always print a ",". */
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if (i == 0)
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{
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if (is_py_none)
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fputs_filtered ("{", stream);
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else
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fputs_filtered (" = {", stream);
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}
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else if (! is_map || i % 2 == 0)
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fputs_filtered (pretty ? "," : ", ", stream);
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@ -532,7 +555,7 @@ apply_val_pretty_printer (struct type *type, const gdb_byte *valaddr,
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char *hint = NULL;
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struct cleanup *cleanups;
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int result = 0;
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int is_py_none = 0;
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cleanups = ensure_python_env (gdbarch, language);
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/* Instantiate the printer. */
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@ -557,9 +580,11 @@ apply_val_pretty_printer (struct type *type, const gdb_byte *valaddr,
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make_cleanup (free_current_contents, &hint);
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/* Print the section */
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print_string_repr (printer, hint, stream, recurse, options, language,
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gdbarch);
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print_children (printer, hint, stream, recurse, options, language);
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is_py_none = print_string_repr (printer, hint, stream, recurse,
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options, language, gdbarch);
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print_children (printer, hint, stream, recurse, options, language,
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is_py_none);
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result = 1;
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@ -1,3 +1,10 @@
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2010-04-14 Phil Muldoon <pmuldoon@redhat.com>
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* gdb.python/py-prettyprint.py (NoStringContainerPrinter): New printer.
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* gdb.python/py-prettyprint.c: Add justchildren struct, typedefs.
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* gdb.python/py-prettyprint.exp: New test for to_string returning None.
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* gdb.python/py-mi.exp: New test for to_string returning None.
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2010-04-12 Phil Muldoon <pmuldoon@redhat.com>
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* gdb.python/py-breakpoint.c: Make result global.
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@ -61,6 +61,16 @@ mi_list_varobj_children container {
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mi_delete_varobj container "delete varobj"
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mi_create_dynamic_varobj nscont nstype \
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"create nscont varobj, no pretty-printing"
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mi_list_varobj_children nscont {
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{ nscont.len len 0 int }
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{ nscont.elements elements 1 "int ." }
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} "examine nscont children=0, no pretty-printing"
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mi_delete_varobj nscont "delete varobj"
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mi_gdb_test "-enable-pretty-printing" ""
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mi_create_varobj_checked string string_1 \
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@ -239,4 +249,29 @@ mi_continue_to_line \
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mi_varobj_update_with_type_change container int 0 "update after type change"
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mi_continue_to_line \
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[gdb_get_line_number {break to inspect struct and union} ${testfile}.c] \
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"step to outer breakpoint"
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mi_create_dynamic_varobj nscont nstype \
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"create nstype varobj"
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mi_list_varobj_children nscont {
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{ {nscont.\[0\]} {\[0\]} 0 int }
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{ {nscont.\[1\]} {\[1\]} 0 int }
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} "list children after setting update range"
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mi_gdb_test "-var-set-visualizer nscont None" \
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"\\^done" \
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"clear visualizer"
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mi_gdb_test "-var-update nscont" \
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"\\^done,changelist=\\\[\\\]" \
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"varobj update after clearing"
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mi_gdb_test "-var-set-visualizer nscont gdb.default_visualizer" \
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"\\^done" \
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"choose default visualizer"
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remote_file host delete ${remote_python_file}
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@ -119,6 +119,15 @@ typedef struct string_repr
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/* This lets us avoid malloc. */
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int array[100];
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int narray[10];
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struct justchildren
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{
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int len;
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int *elements;
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};
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typedef struct justchildren nostring_type;
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struct container
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{
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@ -196,7 +205,9 @@ main ()
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const struct string_repr cstring = { { "const string" } };
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/* Clearing by being `static' could invoke an other GDB C++ bug. */
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struct nullstr nullstr;
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nostring_type nstype;
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nstype.elements = narray;
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nstype.len = 0;
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init_ss(&ss, 1, 2);
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init_ss(ssa+0, 3, 4);
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@ -249,5 +260,9 @@ main ()
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do_nothing ();
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#endif
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nstype.elements[0] = 7;
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nstype.elements[1] = 42;
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nstype.len = 2;
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return 0; /* break to inspect struct and union */
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}
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@ -101,6 +101,7 @@ proc run_lang_tests {lang} {
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gdb_test "print estring" "\"embedded x\\\\201\\\\202\\\\203\\\\204\""
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gdb_test "print c" " = container \"container\" with 2 elements = {$nl *.0. = 23,$nl *.1. = 72$nl}"
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gdb_test "print nstype" " = {$nl *.0. = 7,$nl *.1. = 42$nl}"
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gdb_test "continue" "Program exited normally\."
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remote_file host delete ${remote_python_file}
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@ -53,6 +53,33 @@ class ContainerPrinter:
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def children(self):
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return self._iterator(self.val['elements'], self.val['len'])
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# Test a printer where to_string is None
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class NoStringContainerPrinter:
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class _iterator:
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def __init__ (self, pointer, len):
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self.start = pointer
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self.pointer = pointer
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self.end = pointer + len
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def __iter__(self):
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return self
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def next(self):
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if self.pointer == self.end:
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raise StopIteration
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result = self.pointer
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self.pointer = self.pointer + 1
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return ('[%d]' % int (result - self.start), result.dereference())
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def __init__(self, val):
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self.val = val
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def to_string(self):
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return None
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def children(self):
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return self._iterator(self.val['elements'], self.val['len'])
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class pp_s:
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def __init__(self, val):
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self.val = val
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@ -190,8 +217,10 @@ def register_pretty_printers ():
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# both the C and C++ cases.
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pretty_printers_dict[re.compile ('^struct string_repr$')] = string_print
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pretty_printers_dict[re.compile ('^struct container$')] = ContainerPrinter
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pretty_printers_dict[re.compile ('^struct justchildren$')] = NoStringContainerPrinter
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pretty_printers_dict[re.compile ('^string_repr$')] = string_print
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pretty_printers_dict[re.compile ('^container$')] = ContainerPrinter
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pretty_printers_dict[re.compile ('^justchildren$')] = NoStringContainerPrinter
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pretty_printers_dict[re.compile ('^struct ns$')] = pp_ns
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pretty_printers_dict[re.compile ('^ns$')] = pp_ns
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