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/*
* This file is part of the libsigrokdecode project.
*
* Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
*
* 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/>.
*/
#include <config.h>
#include "libsigrokdecode-internal.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
#include "libsigrokdecode.h"
#include <stdarg.h>
#include <glib.h>
static char *py_stringify(PyObject *py_obj)
{
PyObject *py_str, *py_bytes;
char *str = NULL;
/* Note: Caller already ran PyGILState_Ensure(). */
if (!py_obj)
return NULL;
py_str = PyObject_Str(py_obj);
if (!py_str || !PyUnicode_Check(py_str))
goto cleanup;
py_bytes = PyUnicode_AsUTF8String(py_str);
if (!py_bytes)
goto cleanup;
str = g_strdup(PyBytes_AsString(py_bytes));
Py_DECREF(py_bytes);
cleanup:
Py_XDECREF(py_str);
if (!str) {
PyErr_Clear();
srd_dbg("Failed to stringify object.");
}
return str;
}
static char *py_get_string_attr(PyObject *py_obj, const char *attr)
{
PyObject *py_str, *py_bytes;
char *str = NULL;
/* Note: Caller already ran PyGILState_Ensure(). */
if (!py_obj)
return NULL;
py_str = PyObject_GetAttrString(py_obj, attr);
if (!py_str || !PyUnicode_Check(py_str))
goto cleanup;
py_bytes = PyUnicode_AsUTF8String(py_str);
if (!py_bytes)
goto cleanup;
str = g_strdup(PyBytes_AsString(py_bytes));
Py_DECREF(py_bytes);
cleanup:
Py_XDECREF(py_str);
if (!str) {
PyErr_Clear();
srd_dbg("Failed to get object attribute %s.", attr);
}
return str;
}
/** @private */
SRD_PRIV void srd_exception_catch(const char *format, ...)
{
int i, ret;
va_list args;
PyObject *py_etype, *py_evalue, *py_etraceback;
PyObject *py_mod, *py_func, *py_tracefmt;
char *msg, *etype_name, *evalue_str, *outstr;
const char *etype_name_fallback;
PyGILState_STATE gstate;
GString *s;
py_etype = py_evalue = py_etraceback = py_mod = py_func = NULL;
va_start(args, format);
msg = g_strdup_vprintf(format, args);
va_end(args);
gstate = PyGILState_Ensure();
PyErr_Fetch(&py_etype, &py_evalue, &py_etraceback);
if (!py_etype) {
/* No current exception, so just print the message. */
srd_err("%s.", msg);
goto cleanup;
}
PyErr_NormalizeException(&py_etype, &py_evalue, &py_etraceback);
etype_name = py_get_string_attr(py_etype, "__name__");
evalue_str = py_stringify(py_evalue);
etype_name_fallback = (etype_name) ? etype_name : "(unknown exception)";
if (evalue_str)
srd_err("%s: %s: %s", etype_name_fallback, msg, evalue_str);
else
srd_err("%s: %s.", etype_name_fallback, msg);
g_free(evalue_str);
g_free(etype_name);
/* If there is no traceback object, we are done. */
if (!py_etraceback)
goto cleanup;
py_mod = py_import_by_name("traceback");
if (!py_mod)
goto cleanup;
py_func = PyObject_GetAttrString(py_mod, "format_exception");
if (!py_func || !PyCallable_Check(py_func))
goto cleanup;
/* Call into Python to format the stack trace. */
py_tracefmt = PyObject_CallFunctionObjArgs(py_func,
py_etype, py_evalue, py_etraceback, NULL);
if (!py_tracefmt || !PyList_Check(py_tracefmt))
goto cleanup;
s = g_string_sized_new(128);
for (i = 0; i < PyList_Size(py_tracefmt); i++) {
ret = py_listitem_as_str(py_tracefmt, i, &outstr);
if (ret == 0) {
s = g_string_append(s, outstr);
g_free(outstr);
}
}
srd_err("%s", s->str);
g_string_free(s, TRUE);
Py_DECREF(py_tracefmt);
cleanup:
Py_XDECREF(py_func);
Py_XDECREF(py_mod);
Py_XDECREF(py_etraceback);
Py_XDECREF(py_evalue);
Py_XDECREF(py_etype);
/* Just in case. */
PyErr_Clear();
PyGILState_Release(gstate);
g_free(msg);
}
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