Mercurial > cpython-lru_cache-weakref
annotate Python/errors.c @ 3100:171eef69a2cd legacy-trunk
remove unwanted fatal() from err_badcall()
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Mon, 18 Sep 1995 21:31:16 +0000 |
| parents | 72a61a149e4e |
| children | 65d2d8e67da3 |
| rev | line source |
|---|---|
| 145 | 1 /*********************************************************** |
|
2062
d0d0a69b5ca3
Added 1995 to copyright message.
Guido van Rossum <guido@python.org>
parents:
2052
diff
changeset
|
2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
|
d0d0a69b5ca3
Added 1995 to copyright message.
Guido van Rossum <guido@python.org>
parents:
2052
diff
changeset
|
3 The Netherlands. |
| 145 | 4 |
| 5 All Rights Reserved | |
| 6 | |
| 7 Permission to use, copy, modify, and distribute this software and its | |
| 8 documentation for any purpose and without fee is hereby granted, | |
| 9 provided that the above copyright notice appear in all copies and that | |
| 10 both that copyright notice and this permission notice appear in | |
| 11 supporting documentation, and that the names of Stichting Mathematisch | |
| 12 Centrum or CWI not be used in advertising or publicity pertaining to | |
| 13 distribution of the software without specific, written prior permission. | |
| 14 | |
| 15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO | |
| 16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE | |
| 18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT | |
| 21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 22 | |
| 23 ******************************************************************/ | |
| 24 | |
| 6 | 25 /* Error handling -- see also run.c */ |
| 26 | |
| 27 /* New error handling interface. | |
| 28 | |
| 29 The following problem exists (existed): methods of built-in modules | |
| 30 are called with 'self' and 'args' arguments, but without a context | |
| 31 argument, so they have no way to raise a specific exception. | |
| 32 The same is true for the object implementations: no context argument. | |
| 33 The old convention was to set 'errno' and to return NULL. | |
| 34 The caller (usually call_function() in eval.c) detects the NULL | |
| 35 return value and then calls puterrno(ctx) to turn the errno value | |
| 36 into a true exception. Problems with this approach are: | |
| 37 - it used standard errno values to indicate Python-specific errors, | |
| 86 | 38 but this means that when such an error code is reported by a system |
| 39 call (e.g., in module posix), the user gets a confusing message | |
| 6 | 40 - errno is a global variable, which makes extensions to a multi- |
| 41 threading environment difficult; e.g., in IRIX, multi-threaded | |
| 86 | 42 programs must use the function oserror() instead of looking in errno |
| 6 | 43 - there is no portable way to add new error numbers for specic |
| 44 situations -- the value space for errno is reserved to the OS, yet | |
| 45 the way to turn module-specific errors into a module-specific | |
| 46 exception requires module-specific values for errno | |
| 47 - there is no way to add a more situation-specific message to an | |
| 48 error. | |
| 49 | |
| 50 The new interface solves all these problems. To return an error, a | |
| 86 | 51 built-in function calls err_set(exception), err_setval(exception, |
| 6 | 52 value) or err_setstr(exception, string), and returns NULL. These |
| 53 functions save the value for later use by puterrno(). To adapt this | |
| 54 scheme to a multi-threaded environment, only the implementation of | |
| 55 err_setval() has to be changed. | |
| 56 */ | |
| 57 | |
|
90
5cb843bc87fc
Changed include of <errno.h>
Guido van Rossum <guido@python.org>
parents:
86
diff
changeset
|
58 #include "allobjects.h" |
|
1912
ada19aaaf8c0
* Python/errors.c (err_clear): clear interpreter stack trace
Guido van Rossum <guido@python.org>
parents:
1832
diff
changeset
|
59 #include "traceback.h" |
| 6 | 60 |
|
90
5cb843bc87fc
Changed include of <errno.h>
Guido van Rossum <guido@python.org>
parents:
86
diff
changeset
|
61 #include <errno.h> |
| 86 | 62 |
| 2793 | 63 #ifdef SYMANTEC__CFM68K__ |
|
2376
c31eaed7798b
rename macstrerror to PyMac_StrError; no EINTR test in CW
Guido van Rossum <guido@python.org>
parents:
2190
diff
changeset
|
64 #pragma lib_export on |
|
c31eaed7798b
rename macstrerror to PyMac_StrError; no EINTR test in CW
Guido van Rossum <guido@python.org>
parents:
2190
diff
changeset
|
65 #endif |
|
c31eaed7798b
rename macstrerror to PyMac_StrError; no EINTR test in CW
Guido van Rossum <guido@python.org>
parents:
2190
diff
changeset
|
66 |
|
2019
9e3469c0ed75
Added hook for better mac error messages.
Jack Jansen <jack.jansen@cwi.nl>
parents:
2003
diff
changeset
|
67 #ifdef macintosh |
|
2376
c31eaed7798b
rename macstrerror to PyMac_StrError; no EINTR test in CW
Guido van Rossum <guido@python.org>
parents:
2190
diff
changeset
|
68 /* Replace strerror with a Mac specific routine. |
|
c31eaed7798b
rename macstrerror to PyMac_StrError; no EINTR test in CW
Guido van Rossum <guido@python.org>
parents:
2190
diff
changeset
|
69 XXX PROBLEM: some positive errors have a meaning for MacOS, |
|
c31eaed7798b
rename macstrerror to PyMac_StrError; no EINTR test in CW
Guido van Rossum <guido@python.org>
parents:
2190
diff
changeset
|
70 but some library routines set Unix error numbers... |
|
2019
9e3469c0ed75
Added hook for better mac error messages.
Jack Jansen <jack.jansen@cwi.nl>
parents:
2003
diff
changeset
|
71 */ |
| 2502 | 72 extern char *PyMac_StrError PROTO((int)); |
|
2190
b40e10bda231
Undef strerror on the mac before redefining it
Jack Jansen <jack.jansen@cwi.nl>
parents:
2062
diff
changeset
|
73 #undef strerror |
|
2376
c31eaed7798b
rename macstrerror to PyMac_StrError; no EINTR test in CW
Guido van Rossum <guido@python.org>
parents:
2190
diff
changeset
|
74 #define strerror PyMac_StrError |
|
c31eaed7798b
rename macstrerror to PyMac_StrError; no EINTR test in CW
Guido van Rossum <guido@python.org>
parents:
2190
diff
changeset
|
75 #endif /* macintosh */ |
|
c31eaed7798b
rename macstrerror to PyMac_StrError; no EINTR test in CW
Guido van Rossum <guido@python.org>
parents:
2190
diff
changeset
|
76 |
| 2502 | 77 #ifndef __STDC__ |
|
59
433f52d1d958
Added prototype for strerror.
Guido van Rossum <guido@python.org>
parents:
37
diff
changeset
|
78 extern char *strerror PROTO((int)); |
| 2502 | 79 #endif |
|
59
433f52d1d958
Added prototype for strerror.
Guido van Rossum <guido@python.org>
parents:
37
diff
changeset
|
80 |
| 6 | 81 /* Last exception stored by err_setval() */ |
| 82 | |
| 83 static object *last_exception; | |
| 84 static object *last_exc_val; | |
| 85 | |
| 86 void | |
|
2052
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
87 err_restore(exception, value, traceback) |
|
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
88 object *exception; |
|
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
89 object *value; |
|
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
90 object *traceback; |
|
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
91 { |
|
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
92 err_clear(); |
|
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
93 |
|
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
94 last_exception = exception; |
|
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
95 last_exc_val = value; |
|
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
96 (void) tb_store(traceback); |
|
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
97 XDECREF(traceback); |
|
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
98 } |
|
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
99 |
|
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
100 void |
| 6 | 101 err_setval(exception, value) |
| 102 object *exception; | |
| 103 object *value; | |
| 104 { | |
| 86 | 105 XINCREF(exception); |
| 106 XINCREF(value); | |
|
2052
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
107 err_restore(exception, value, (object *)NULL); |
| 6 | 108 } |
| 109 | |
| 110 void | |
| 111 err_set(exception) | |
| 112 object *exception; | |
| 113 { | |
| 114 err_setval(exception, (object *)NULL); | |
| 115 } | |
| 116 | |
| 117 void | |
| 118 err_setstr(exception, string) | |
| 119 object *exception; | |
| 120 char *string; | |
| 121 { | |
| 122 object *value = newstringobject(string); | |
| 123 err_setval(exception, value); | |
| 86 | 124 XDECREF(value); |
| 6 | 125 } |
| 126 | |
|
1832
79e420805c67
err_clear: clear interpreter stack trace
Guido van Rossum <guido@python.org>
parents:
1319
diff
changeset
|
127 |
|
79e420805c67
err_clear: clear interpreter stack trace
Guido van Rossum <guido@python.org>
parents:
1319
diff
changeset
|
128 object * |
| 6 | 129 err_occurred() |
| 130 { | |
|
1832
79e420805c67
err_clear: clear interpreter stack trace
Guido van Rossum <guido@python.org>
parents:
1319
diff
changeset
|
131 return last_exception; |
| 6 | 132 } |
| 133 | |
| 134 void | |
|
2052
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
135 err_fetch(p_exc, p_val, p_tb) |
| 6 | 136 object **p_exc; |
| 137 object **p_val; | |
|
2052
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
138 object **p_tb; |
| 6 | 139 { |
| 140 *p_exc = last_exception; | |
| 141 last_exception = NULL; | |
| 142 *p_val = last_exc_val; | |
| 143 last_exc_val = NULL; | |
|
2052
d7e91437f0a2
Lots of changes, most minor (fatal() instead of abort(), use of
Guido van Rossum <guido@python.org>
parents:
2019
diff
changeset
|
144 *p_tb = tb_fetch(); |
| 6 | 145 } |
| 146 | |
| 147 void | |
| 148 err_clear() | |
| 149 { | |
|
1912
ada19aaaf8c0
* Python/errors.c (err_clear): clear interpreter stack trace
Guido van Rossum <guido@python.org>
parents:
1832
diff
changeset
|
150 object *tb; |
| 86 | 151 XDECREF(last_exception); |
| 152 last_exception = NULL; | |
| 153 XDECREF(last_exc_val); | |
| 154 last_exc_val = NULL; | |
|
1912
ada19aaaf8c0
* Python/errors.c (err_clear): clear interpreter stack trace
Guido van Rossum <guido@python.org>
parents:
1832
diff
changeset
|
155 /* Also clear interpreter stack trace */ |
|
ada19aaaf8c0
* Python/errors.c (err_clear): clear interpreter stack trace
Guido van Rossum <guido@python.org>
parents:
1832
diff
changeset
|
156 tb = tb_fetch(); |
|
ada19aaaf8c0
* Python/errors.c (err_clear): clear interpreter stack trace
Guido van Rossum <guido@python.org>
parents:
1832
diff
changeset
|
157 XDECREF(tb); |
| 6 | 158 } |
|
9
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
159 |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
160 /* Convenience functions to set a type error exception and return 0 */ |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
161 |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
162 int |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
163 err_badarg() |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
164 { |
|
66
46cb14aec10a
Reformulated err_badarg error message.
Guido van Rossum <guido@python.org>
parents:
59
diff
changeset
|
165 err_setstr(TypeError, "illegal argument type for built-in operation"); |
|
9
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
166 return 0; |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
167 } |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
168 |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
169 object * |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
170 err_nomem() |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
171 { |
| 86 | 172 err_set(MemoryError); |
|
9
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
173 return NULL; |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
174 } |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
175 |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
176 object * |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
177 err_errno(exc) |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
178 object *exc; |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
179 { |
|
390
172aa2c3e734
Check for EINTR and turn it into KeyboardInterrupt
Guido van Rossum <guido@python.org>
parents:
145
diff
changeset
|
180 object *v; |
|
1832
79e420805c67
err_clear: clear interpreter stack trace
Guido van Rossum <guido@python.org>
parents:
1319
diff
changeset
|
181 int i = errno; |
|
2376
c31eaed7798b
rename macstrerror to PyMac_StrError; no EINTR test in CW
Guido van Rossum <guido@python.org>
parents:
2190
diff
changeset
|
182 #ifdef EINTR |
|
1832
79e420805c67
err_clear: clear interpreter stack trace
Guido van Rossum <guido@python.org>
parents:
1319
diff
changeset
|
183 if (i == EINTR && sigcheck()) |
|
390
172aa2c3e734
Check for EINTR and turn it into KeyboardInterrupt
Guido van Rossum <guido@python.org>
parents:
145
diff
changeset
|
184 return NULL; |
|
2376
c31eaed7798b
rename macstrerror to PyMac_StrError; no EINTR test in CW
Guido van Rossum <guido@python.org>
parents:
2190
diff
changeset
|
185 #endif |
|
1832
79e420805c67
err_clear: clear interpreter stack trace
Guido van Rossum <guido@python.org>
parents:
1319
diff
changeset
|
186 v = mkvalue("(is)", i, strerror(i)); |
|
9
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
187 if (v != NULL) { |
|
1252
c4cd0d9d8281
* Changed many files to use mkvalue() instead of newtupleobject().
Guido van Rossum <guido@python.org>
parents:
795
diff
changeset
|
188 err_setval(exc, v); |
|
c4cd0d9d8281
* Changed many files to use mkvalue() instead of newtupleobject().
Guido van Rossum <guido@python.org>
parents:
795
diff
changeset
|
189 DECREF(v); |
|
9
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
190 } |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
191 return NULL; |
|
33701db4ea55
Adde dconvenience functions.
Guido van Rossum <guido@python.org>
parents:
6
diff
changeset
|
192 } |
| 22 | 193 |
| 194 void | |
| 195 err_badcall() | |
| 196 { | |
| 197 err_setstr(SystemError, "bad argument to internal function"); | |
| 198 } |