Add python gdb.GdbError and gdb.string_to_argv.

	* NEWS: Document them.
	* python/py-cmd.c (cmdpy_function): Don't print a traceback if
	the exception is gdb.GdbError.  Print a second traceback if there's
	an error computing the error message.
	(gdbpy_string_to_argv): New function.
	* python/py-utils.c (gdbpy_obj_to_string): New function.
	(gdbpy_exception_to_string): New function.
	* python/python-internal.h (gdbpy_string_to_argv): Declare.
	(gdbpy_obj_to_string, gdbpy_exception_to_string): Declare.
	(gdbpy_gdberror_exc): Declare.
	* python/python.c (gdbpy_gdberror_exc): New global.
	(_initialize_python): Initialize gdbpy_gdberror_exc and create
	gdb.GdbError.
	(GdbMethods): Add string_to_argv.

	doc/
	* gdb.texinfo (Exception Handling): Document gdb.GdbError.
	(Commands In Python): Document gdb.string_to_argv.

	testsuite/
	* gdb.python/py-cmd.exp: Add tests for gdb.GdbError and
	gdb.string_to_argv.

1 files changed, 6 insertions, 0 deletions

diff --git a/gdb/python/python-internal.h b/gdb/python/python-internal.h
index f41f32a..bc07b5d 100644
--- a/gdb/python/python-internal.h
+++ b/gdb/python/python-internal.h
@@ -92,6 +92,7 @@ PyObject *gdbpy_block_for_pc (PyObject *self, PyObject *args);
 PyObject *gdbpy_lookup_type (PyObject *self, PyObject *args, PyObject *kw);
 PyObject *gdbpy_create_lazy_string_object (CORE_ADDR address, long length,
 					   const char *encoding, struct type *type);
+PyObject *gdbpy_string_to_argv (PyObject *self, PyObject *args);
 PyObject *gdbpy_get_hook_function (const char *);
 PyObject *gdbpy_parameter (PyObject *self, PyObject *args);
 PyObject *gdbpy_parameter_value (enum var_types type, void *var);
@@ -179,6 +180,9 @@ PyObject *python_string_to_target_python_string (PyObject *obj);
 char *python_string_to_host_string (PyObject *obj);
 PyObject *target_string_to_unicode (const gdb_byte *str, int length);
 int gdbpy_is_string (PyObject *obj);
+char *gdbpy_obj_to_string (PyObject *obj);
+char *gdbpy_exception_to_string (PyObject *ptype, PyObject *pvalue);
+
 int gdbpy_is_lazy_string (PyObject *result);
 gdb_byte *gdbpy_extract_lazy_string (PyObject *string,
 				     struct type **str_type, 
@@ -197,4 +201,6 @@ extern PyObject *gdbpy_children_cst;
 extern PyObject *gdbpy_to_string_cst;
 extern PyObject *gdbpy_display_hint_cst;
 
+extern PyObject *gdbpy_gdberror_exc;
+
 #endif /* GDB_PYTHON_INTERNAL_H */