From 07ca107c2d958b45633ef0cdcce7219a95f0cf01 Mon Sep 17 00:00:00 2001 From: Doug Evans Date: Tue, 25 May 2010 15:27:17 +0000 Subject: 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. --- gdb/python/py-utils.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) (limited to 'gdb/python/py-utils.c') diff --git a/gdb/python/py-utils.c b/gdb/python/py-utils.c index cd11834..944e6b4 100644 --- a/gdb/python/py-utils.c +++ b/gdb/python/py-utils.c @@ -222,3 +222,53 @@ gdbpy_is_string (PyObject *obj) { return PyString_Check (obj) || PyUnicode_Check (obj); } + +/* Return the string representation of OBJ, i.e., str (obj). + Space for the result is malloc'd, the caller must free. + If the result is NULL a python error occurred, the caller must clear it. */ + +char * +gdbpy_obj_to_string (PyObject *obj) +{ + PyObject *str_obj = PyObject_Str (obj); + + if (str_obj != NULL) + { + char *msg = xstrdup (PyString_AsString (str_obj)); + + Py_DECREF (str_obj); + return msg; + } + + return NULL; +} + +/* Return the string representation of the exception represented by + TYPE, VALUE which is assumed to have been obtained with PyErr_Fetch, + i.e., the error indicator is currently clear. + Space for the result is malloc'd, the caller must free. + If the result is NULL a python error occurred, the caller must clear it. */ + +char * +gdbpy_exception_to_string (PyObject *ptype, PyObject *pvalue) +{ + PyObject *str_obj = PyObject_Str (pvalue); + char *str; + + /* There are a few cases to consider. + For example: + pvalue is a string when PyErr_SetString is used. + pvalue is not a string when raise "foo" is used, instead it is None + and ptype is "foo". + So the algorithm we use is to print `str (pvalue)' if it's not + None, otherwise we print `str (ptype)'. + Using str (aka PyObject_Str) will fetch the error message from + gdb.GdbError ("message"). */ + + if (pvalue && pvalue != Py_None) + str = gdbpy_obj_to_string (pvalue); + else + str = gdbpy_obj_to_string (ptype); + + return str; +} -- cgit v1.1