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1 | /* | |
2 | * This file is part of the libsigrokdecode project. | |
3 | * | |
4 | * Copyright (C) 2012 Bert Vermeulen <bert@biot.com> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include "libsigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */ | |
21 | #include "libsigrokdecode-internal.h" | |
22 | #include "config.h" | |
23 | #include <stdarg.h> | |
24 | #include <glib.h> | |
25 | #include <frameobject.h> /* Python header not pulled in by default. */ | |
26 | ||
27 | /** @private */ | |
28 | SRD_PRIV void srd_exception_catch(const char *format, ...) | |
29 | { | |
30 | PyObject *etype, *evalue, *etb, *py_str; | |
31 | PyTracebackObject *py_tb; | |
32 | GString *msg; | |
33 | va_list args; | |
34 | char *ename, *str, *tracestr; | |
35 | ||
36 | if (!PyErr_Occurred()) | |
37 | /* Nothing is wrong. */ | |
38 | return; | |
39 | ||
40 | PyErr_Fetch(&etype, &evalue, &etb); | |
41 | PyErr_NormalizeException(&etype, &evalue, &etb); | |
42 | ||
43 | if (!(py_str = PyObject_Str(evalue))) { | |
44 | /* Shouldn't happen. */ | |
45 | srd_dbg("Failed to convert exception value to string."); | |
46 | return; | |
47 | } | |
48 | ||
49 | msg = g_string_sized_new(128); | |
50 | va_start(args, format); | |
51 | g_string_vprintf(msg, format, args); | |
52 | va_end(args); | |
53 | ||
54 | /* Can be NULL. */ | |
55 | if (evalue) | |
56 | ename = (char *)Py_TYPE(evalue)->tp_name; | |
57 | else | |
58 | ename = "(unknown exception)"; | |
59 | ||
60 | /* Send the exception error message(s) to srd_err(). */ | |
61 | py_str_as_str(py_str, &str); | |
62 | g_string_append(msg, ename); | |
63 | g_string_append(msg, ": "); | |
64 | g_string_append(msg, str); | |
65 | Py_DecRef(py_str); | |
66 | srd_err(msg->str); | |
67 | ||
68 | /* Send a more precise error location to srd_dbg(), if we have it. */ | |
69 | if (etb && etb != Py_None) { | |
70 | tracestr = NULL; | |
71 | py_tb = (PyTracebackObject *)etb; | |
72 | py_str = PyUnicode_FromFormat("%U:%d in %U", | |
73 | py_tb->tb_frame->f_code->co_filename, | |
74 | py_tb->tb_frame->f_lineno, | |
75 | py_tb->tb_frame->f_code->co_name); | |
76 | py_str_as_str(py_str, &tracestr); | |
77 | Py_DecRef(py_str); | |
78 | g_string_printf(msg, "%s in %s: %s", ename, tracestr, str); | |
79 | srd_dbg(msg->str); | |
80 | g_free(tracestr); | |
81 | } | |
82 | g_free(str); | |
83 | g_string_free(msg, TRUE); | |
84 | ||
85 | Py_XDECREF(etype); | |
86 | Py_XDECREF(evalue); | |
87 | Py_XDECREF(etb); | |
88 | ||
89 | /* Just in case. */ | |
90 | PyErr_Clear(); | |
91 | } |