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ec871a27 | 1 | /* |
50bd5d25 | 2 | * This file is part of the libsigrokdecode project. |
ec871a27 BV |
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 | ||
36784362 | 20 | #include <config.h> |
f6c7eade MC |
21 | #include "libsigrokdecode-internal.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */ |
22 | #include "libsigrokdecode.h" | |
ec871a27 BV |
23 | #include <stdarg.h> |
24 | #include <glib.h> | |
25 | #include <frameobject.h> /* Python header not pulled in by default. */ | |
26 | ||
57790bc8 | 27 | /** @private */ |
aafeeaea | 28 | SRD_PRIV void srd_exception_catch(const char *format, ...) |
ec871a27 BV |
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))) { | |
7a1712c4 UH |
44 | /* Shouldn't happen. */ |
45 | srd_dbg("Failed to convert exception value to string."); | |
ec871a27 BV |
46 | return; |
47 | } | |
48 | ||
84d7ecb9 | 49 | /* Send the exception error message(s) to srd_err(). */ |
ec871a27 BV |
50 | if (evalue) |
51 | ename = (char *)Py_TYPE(evalue)->tp_name; | |
52 | else | |
84d7ecb9 | 53 | /* Can be NULL. */ |
ec871a27 BV |
54 | ename = "(unknown exception)"; |
55 | ||
84d7ecb9 | 56 | msg = g_string_sized_new(128); |
ec871a27 BV |
57 | g_string_append(msg, ename); |
58 | g_string_append(msg, ": "); | |
84d7ecb9 BV |
59 | va_start(args, format); |
60 | g_string_append_vprintf(msg, format, args); | |
61 | va_end(args); | |
62 | py_str_as_str(py_str, &str); | |
ec871a27 BV |
63 | g_string_append(msg, str); |
64 | Py_DecRef(py_str); | |
4916b173 | 65 | srd_err("%s", msg->str); |
ec871a27 BV |
66 | |
67 | /* Send a more precise error location to srd_dbg(), if we have it. */ | |
68 | if (etb && etb != Py_None) { | |
69 | tracestr = NULL; | |
361fdcaa | 70 | py_tb = (PyTracebackObject *)etb; |
ec871a27 | 71 | py_str = PyUnicode_FromFormat("%U:%d in %U", |
c9bfccc6 UH |
72 | py_tb->tb_frame->f_code->co_filename, |
73 | py_tb->tb_frame->f_lineno, | |
74 | py_tb->tb_frame->f_code->co_name); | |
ec871a27 BV |
75 | py_str_as_str(py_str, &tracestr); |
76 | Py_DecRef(py_str); | |
7a1712c4 | 77 | g_string_printf(msg, "%s in %s: %s", ename, tracestr, str); |
4916b173 | 78 | srd_dbg("%s", msg->str); |
ec871a27 BV |
79 | g_free(tracestr); |
80 | } | |
81 | g_free(str); | |
82 | g_string_free(msg, TRUE); | |
83 | ||
84 | Py_XDECREF(etype); | |
85 | Py_XDECREF(evalue); | |
86 | Py_XDECREF(etb); | |
87 | ||
88 | /* Just in case. */ | |
89 | PyErr_Clear(); | |
ec871a27 | 90 | } |