annotate Python/traceback.c @ 40737:6ebad2a6b990

Merged revisions 53451-53537 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r53454 | brett.cannon | 2007-01-15 20:12:08 +0100 (Mon, 15 Jan 2007) | 3 lines Add a note for strptime that just because strftime supports some extra directive that is not documented that strptime will as well. ........ r53458 | vinay.sajip | 2007-01-16 10:50:07 +0100 (Tue, 16 Jan 2007) | 1 line Updated rotating file handlers to use _open(). ........ r53459 | marc-andre.lemburg | 2007-01-16 14:03:06 +0100 (Tue, 16 Jan 2007) | 2 lines Add news items for the recent pybench and platform changes. ........ r53460 | sjoerd.mullender | 2007-01-16 17:42:38 +0100 (Tue, 16 Jan 2007) | 4 lines Fixed ntpath.expandvars to not replace references to non-existing variables with nothing. Also added tests. This fixes bug #494589. ........ r53464 | neal.norwitz | 2007-01-17 07:23:51 +0100 (Wed, 17 Jan 2007) | 1 line Give Calvin Spealman access for python-dev summaries. ........ r53465 | neal.norwitz | 2007-01-17 09:37:26 +0100 (Wed, 17 Jan 2007) | 1 line Remove Calvin since he only has access to the website currently. ........ r53466 | thomas.heller | 2007-01-17 10:40:34 +0100 (Wed, 17 Jan 2007) | 2 lines Replace C++ comments with C comments. ........ r53472 | andrew.kuchling | 2007-01-17 20:55:06 +0100 (Wed, 17 Jan 2007) | 1 line [Part of bug #1599254] Add suggestion to Mailbox docs to use Maildir, and warn user to lock/unlock mailboxes when modifying them ........ r53475 | georg.brandl | 2007-01-17 22:09:04 +0100 (Wed, 17 Jan 2007) | 2 lines Bug #1637967: missing //= operator in list. ........ r53477 | georg.brandl | 2007-01-17 22:19:58 +0100 (Wed, 17 Jan 2007) | 2 lines Bug #1629125: fix wrong data type (int -> Py_ssize_t) in PyDict_Next docs. ........ r53481 | neal.norwitz | 2007-01-18 06:40:58 +0100 (Thu, 18 Jan 2007) | 1 line Try reverting part of r53145 that seems to cause the Windows buildbots to fail in test_uu.UUFileTest.test_encode ........ r53482 | fred.drake | 2007-01-18 06:42:30 +0100 (Thu, 18 Jan 2007) | 1 line add missing version entry ........ r53483 | neal.norwitz | 2007-01-18 07:20:55 +0100 (Thu, 18 Jan 2007) | 7 lines This test doesn't pass on Windows. The cause seems to be that chmod doesn't support the same funcationality as on Unix. I'm not sure if this fix is the best (or if it will even work)--it's a test to see if the buildbots start passing again. It might be better to not even run this test if it's windows (or non-posix). ........ r53488 | neal.norwitz | 2007-01-19 06:53:33 +0100 (Fri, 19 Jan 2007) | 1 line SF #1635217, Fix unbalanced paren ........ r53489 | martin.v.loewis | 2007-01-19 07:42:22 +0100 (Fri, 19 Jan 2007) | 3 lines Prefix AST symbols with _Py_. Fixes #1637022. Will backport. ........ r53497 | martin.v.loewis | 2007-01-19 19:01:38 +0100 (Fri, 19 Jan 2007) | 2 lines Add UUIDs for 2.5.1 and 2.5.2 ........ r53499 | raymond.hettinger | 2007-01-19 19:07:18 +0100 (Fri, 19 Jan 2007) | 1 line SF# 1635892: Fix docs for betavariate's input parameters . ........ r53503 | martin.v.loewis | 2007-01-20 15:05:39 +0100 (Sat, 20 Jan 2007) | 2 lines Merge 53501 and 53502 from 25 branch: Add /GS- for AMD64 and Itanium builds where missing. ........ r53504 | walter.doerwald | 2007-01-20 18:28:31 +0100 (Sat, 20 Jan 2007) | 2 lines Port test_resource.py to unittest. ........ r53505 | walter.doerwald | 2007-01-20 19:19:33 +0100 (Sat, 20 Jan 2007) | 2 lines Add argument tests an calls of resource.getrusage(). ........ r53506 | walter.doerwald | 2007-01-20 20:03:17 +0100 (Sat, 20 Jan 2007) | 2 lines resource.RUSAGE_BOTH might not exist. ........ r53507 | walter.doerwald | 2007-01-21 00:07:28 +0100 (Sun, 21 Jan 2007) | 2 lines Port test_new.py to unittest. ........ r53508 | martin.v.loewis | 2007-01-21 10:33:07 +0100 (Sun, 21 Jan 2007) | 2 lines Patch #1610575: Add support for _Bool to struct. ........ r53509 | georg.brandl | 2007-01-21 11:28:43 +0100 (Sun, 21 Jan 2007) | 3 lines Bug #1486663: don't reject keyword arguments for subclasses of builtin types. ........ r53511 | georg.brandl | 2007-01-21 11:35:10 +0100 (Sun, 21 Jan 2007) | 2 lines Patch #1627441: close sockets properly in urllib2. ........ r53517 | georg.brandl | 2007-01-22 20:40:21 +0100 (Mon, 22 Jan 2007) | 3 lines Use new email module names (#1637162, #1637159, #1637157). ........ r53518 | andrew.kuchling | 2007-01-22 21:26:40 +0100 (Mon, 22 Jan 2007) | 1 line Improve pattern used for mbox 'From' lines; add a simple test ........ r53519 | andrew.kuchling | 2007-01-22 21:27:50 +0100 (Mon, 22 Jan 2007) | 1 line Make comment match the code ........ r53522 | georg.brandl | 2007-01-22 22:10:33 +0100 (Mon, 22 Jan 2007) | 2 lines Bug #1249573: fix rfc822.parsedate not accepting a certain date format ........ r53524 | georg.brandl | 2007-01-22 22:23:41 +0100 (Mon, 22 Jan 2007) | 2 lines Bug #1627316: handle error in condition/ignore pdb commands more gracefully. ........ r53526 | lars.gustaebel | 2007-01-23 12:17:33 +0100 (Tue, 23 Jan 2007) | 4 lines Patch #1507247: tarfile.py: use current umask for intermediate directories. ........ r53527 | thomas.wouters | 2007-01-23 14:42:00 +0100 (Tue, 23 Jan 2007) | 13 lines SF patch #1630975: Fix crash when replacing sys.stdout in sitecustomize When running the interpreter in an environment that would cause it to set stdout/stderr/stdin's encoding, having a sitecustomize that would replace them with something other than PyFile objects would crash the interpreter. Fix it by simply ignoring the encoding-setting for non-files. This could do with a test, but I can think of no maintainable and portable way to test this bug, short of adding a sitecustomize.py to the buildsystem and have it always run with it (hmmm....) ........ r53528 | thomas.wouters | 2007-01-23 14:50:49 +0100 (Tue, 23 Jan 2007) | 4 lines Add news entry about last checkin (oops.) ........ r53531 | martin.v.loewis | 2007-01-23 22:11:47 +0100 (Tue, 23 Jan 2007) | 4 lines Make PyTraceBack_Here use the current thread, not the frame's thread state. Fixes #1579370. Will backport. ........ r53535 | brett.cannon | 2007-01-24 00:21:22 +0100 (Wed, 24 Jan 2007) | 5 lines Fix crasher for when an object's __del__ creates a new weakref to itself. Patch only fixes new-style classes; classic classes still buggy. Closes bug #1377858. Already backported. ........ r53536 | walter.doerwald | 2007-01-24 01:42:19 +0100 (Wed, 24 Jan 2007) | 2 lines Port test_popen.py to unittest. ........
author Thomas Wouters <thomas@python.org>
date Thu, 01 Feb 2007 18:02:27 +0000
parents 4aee3f672f77
children e70cdce0e8b2
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2 /* Traceback implementation */
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4 #include "Python.h"
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6 #include "code.h"
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7 #include "frameobject.h"
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8 #include "structmember.h"
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9 #include "osdefs.h"
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10 #include "traceback.h"
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12 #define OFF(x) offsetof(PyTracebackObject, x)
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14 static struct memberlist tb_memberlist[] = {
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15 {"tb_next", T_OBJECT, OFF(tb_next)},
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16 {"tb_frame", T_OBJECT, OFF(tb_frame)},
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17 {"tb_lasti", T_INT, OFF(tb_lasti)},
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18 {"tb_lineno", T_INT, OFF(tb_lineno)},
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19 {NULL} /* Sentinel */
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20 };
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22 static PyObject *
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23 tb_getattr(PyTracebackObject *tb, char *name)
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24 {
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25 return PyMember_Get((char *)tb, tb_memberlist, name);
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26 }
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28 static void
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29 tb_dealloc(PyTracebackObject *tb)
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30 {
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31 PyObject_GC_UnTrack(tb);
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32 Py_TRASHCAN_SAFE_BEGIN(tb)
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33 Py_XDECREF(tb->tb_next);
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34 Py_XDECREF(tb->tb_frame);
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35 PyObject_GC_Del(tb);
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36 Py_TRASHCAN_SAFE_END(tb)
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37 }
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39 static int
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40 tb_traverse(PyTracebackObject *tb, visitproc visit, void *arg)
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41 {
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42 Py_VISIT(tb->tb_next);
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43 Py_VISIT(tb->tb_frame);
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44 return 0;
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47 static void
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48 tb_clear(PyTracebackObject *tb)
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49 {
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50 Py_CLEAR(tb->tb_next);
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51 Py_CLEAR(tb->tb_frame);
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52 }
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54 PyTypeObject PyTraceBack_Type = {
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55 PyObject_HEAD_INIT(&PyType_Type)
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56 0,
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57 "traceback",
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58 sizeof(PyTracebackObject),
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59 0,
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60 (destructor)tb_dealloc, /*tp_dealloc*/
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61 0, /*tp_print*/
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62 (getattrfunc)tb_getattr, /*tp_getattr*/
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63 0, /*tp_setattr*/
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64 0, /*tp_compare*/
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65 0, /*tp_repr*/
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66 0, /*tp_as_number*/
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67 0, /*tp_as_sequence*/
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68 0, /*tp_as_mapping*/
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69 0, /* tp_hash */
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70 0, /* tp_call */
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71 0, /* tp_str */
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72 0, /* tp_getattro */
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73 0, /* tp_setattro */
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74 0, /* tp_as_buffer */
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75 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */
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76 0, /* tp_doc */
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77 (traverseproc)tb_traverse, /* tp_traverse */
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78 (inquiry)tb_clear, /* tp_clear */
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79 0, /* tp_richcompare */
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80 0, /* tp_weaklistoffset */
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81 0, /* tp_iter */
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82 0, /* tp_iternext */
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83 0, /* tp_methods */
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84 0, /* tp_members */
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85 0, /* tp_getset */
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86 0, /* tp_base */
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87 0, /* tp_dict */
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88 };
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90 static PyTracebackObject *
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91 newtracebackobject(PyTracebackObject *next, PyFrameObject *frame)
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92 {
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93 PyTracebackObject *tb;
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94 if ((next != NULL && !PyTraceBack_Check(next)) ||
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95 frame == NULL || !PyFrame_Check(frame)) {
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96 PyErr_BadInternalCall();
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97 return NULL;
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98 }
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99 tb = PyObject_GC_New(PyTracebackObject, &PyTraceBack_Type);
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100 if (tb != NULL) {
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101 Py_XINCREF(next);
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102 tb->tb_next = next;
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103 Py_XINCREF(frame);
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104 tb->tb_frame = frame;
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Michael W. Hudson <mwh@python.net>
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105 tb->tb_lasti = frame->f_lasti;
cf5928fab108 This is my patch
Michael W. Hudson <mwh@python.net>
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106 tb->tb_lineno = PyCode_Addr2Line(frame->f_code,
cf5928fab108 This is my patch
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107 frame->f_lasti);
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2288c724fe2b Call PyObject_GC_UnTrack before putting an object on the list of trash.
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108 PyObject_GC_Track(tb);
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109 }
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110 return tb;
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111 }
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112
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113 int
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114 PyTraceBack_Here(PyFrameObject *frame)
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115 {
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116 PyThreadState *tstate = PyThreadState_GET();
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117 PyTracebackObject *oldtb = (PyTracebackObject *) tstate->curexc_traceback;
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118 PyTracebackObject *tb = newtracebackobject(oldtb, frame);
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119 if (tb == NULL)
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120 return -1;
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121 tstate->curexc_traceback = (PyObject *)tb;
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122 Py_XDECREF(oldtb);
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123 return 0;
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124 }
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125
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126 static int
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127 tb_displayline(PyObject *f, char *filename, int lineno, char *name)
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128 {
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129 int err = 0;
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130 FILE *xfp;
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131 char linebuf[2000];
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132 int i;
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133 if (filename == NULL || name == NULL)
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134 return -1;
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135 /* This is needed by Emacs' compile command */
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136 #define FMT " File \"%.500s\", line %d, in %.500s\n"
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137 xfp = fopen(filename, "r" PY_STDIOTEXTMODE);
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138 if (xfp == NULL) {
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139 /* Search tail of filename in sys.path before giving up */
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140 PyObject *path;
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141 char *tail = strrchr(filename, SEP);
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142 if (tail == NULL)
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143 tail = filename;
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144 else
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145 tail++;
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146 path = PySys_GetObject("path");
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147 if (path != NULL && PyList_Check(path)) {
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148 Py_ssize_t _npath = PyList_Size(path);
30aef3ce2b26 Use Py_ssize_t to count the
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149 int npath = Py_SAFE_DOWNCAST(_npath, Py_ssize_t, int);
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150 size_t taillen = strlen(tail);
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151 char namebuf[MAXPATHLEN+1];
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152 for (i = 0; i < npath; i++) {
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153 PyObject *v = PyList_GetItem(path, i);
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154 if (v == NULL) {
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155 PyErr_Clear();
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156 break;
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157 }
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158 if (PyString_Check(v)) {
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159 size_t len;
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160 len = PyString_GET_SIZE(v);
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161 if (len + 1 + taillen >= MAXPATHLEN)
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162 continue; /* Too long */
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163 strcpy(namebuf, PyString_AsString(v));
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164 if (strlen(namebuf) != len)
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165 continue; /* v contains '\0' */
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166 if (len > 0 && namebuf[len-1] != SEP)
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167 namebuf[len++] = SEP;
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168 strcpy(namebuf+len, tail);
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169 xfp = fopen(namebuf, "r" PY_STDIOTEXTMODE);
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170 if (xfp != NULL) {
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171 filename = namebuf;
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172 break;
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173 }
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174 }
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175 }
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176 }
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177 }
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Jeremy Hylton <jeremy@alum.mit.edu>
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178 PyOS_snprintf(linebuf, sizeof(linebuf), FMT, filename, lineno, name);
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179 err = PyFile_WriteString(linebuf, f);
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180 if (xfp == NULL)
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181 return err;
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182 else if (err != 0) {
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183 fclose(xfp);
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184 return err;
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185 }
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186 for (i = 0; i < lineno; i++) {
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187 char* pLastChar = &linebuf[sizeof(linebuf)-2];
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188 do {
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189 *pLastChar = '\0';
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190 if (Py_UniversalNewlineFgets(linebuf, sizeof linebuf, xfp, NULL) == NULL)
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191 break;
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192 /* fgets read *something*; if it didn't get as
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193 far as pLastChar, it must have found a newline
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194 or hit the end of the file; if pLastChar is \n,
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195 it obviously found a newline; else we haven't
d3696bf08eee Tim Peters fixed PR#75: very long lines cause incorrect tracebacks.
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196 yet seen a newline, so must continue */
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197 } while (*pLastChar != '\0' && *pLastChar != '\n');
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198 }
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199 if (i == lineno) {
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200 char *p = linebuf;
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201 while (*p == ' ' || *p == '\t' || *p == '\014')
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202 p++;
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203 err = PyFile_WriteString(" ", f);
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204 if (err == 0) {
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205 err = PyFile_WriteString(p, f);
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206 if (err == 0 && strchr(p, '\n') == NULL)
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207 err = PyFile_WriteString("\n", f);
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208 }
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209 }
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210 fclose(xfp);
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211 return err;
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212 }
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213
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214 static int
31739
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215 tb_printinternal(PyTracebackObject *tb, PyObject *f, int limit)
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216 {
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217 int err = 0;
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218 int depth = 0;
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219 PyTracebackObject *tb1 = tb;
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220 while (tb1 != NULL) {
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221 depth++;
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222 tb1 = tb1->tb_next;
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223 }
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224 while (tb != NULL && err == 0) {
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225 if (depth <= limit) {
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226 err = tb_displayline(f,
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227 PyString_AsString(
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228 tb->tb_frame->f_code->co_filename),
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229 tb->tb_lineno,
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230 PyString_AsString(tb->tb_frame->f_code->co_name));
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231 }
1425
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232 depth--;
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233 tb = tb->tb_next;
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234 if (err == 0)
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235 err = PyErr_CheckSignals();
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236 }
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237 return err;
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238 }
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239
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240 int
13658
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Thomas Wouters <thomas@python.org>
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241 PyTraceBack_Print(PyObject *v, PyObject *f)
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242 {
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243 int err;
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244 PyObject *limitv;
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245 int limit = 1000;
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246 if (v == NULL)
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247 return 0;
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Tim Peters <tim.peters@gmail.com>
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248 if (!PyTraceBack_Check(v)) {
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249 PyErr_BadInternalCall();
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250 return -1;
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251 }
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252 limitv = PySys_GetObject("tracebacklimit");
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4aee3f672f77 Merged the int/long unification branch, by very crude means (sorry Thomas!).
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253 if (limitv && PyInt_CheckExact(limitv)) {
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254 limit = PyInt_AsLong(limitv);
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255 if (limit <= 0)
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256 return 0;
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257 }
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258 err = PyFile_WriteString("Traceback (most recent call last):\n", f);
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259 if (!err)
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Nicholas Bastin <nick.bastin@gmail.com>
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260 err = tb_printinternal((PyTracebackObject *)v, f, limit);
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261 return err;
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262 }