1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*
* 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);
}
|
