python/Python/traceback.c at master · sinneb/python · GitHub

History

291 lines (269 loc) · 6.76 KB

Raw

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

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

/* Traceback implementation */

#include "Python.h"

#include "code.h"

#include "frameobject.h"

#include "structmember.h"

#include "osdefs.h"

#include "traceback.h"

#define OFF(x) offsetof(PyTracebackObject, x)

static struct memberlist tb_memberlist[] = {

{"tb_next", T_OBJECT, OFF(tb_next)},

{"tb_frame", T_OBJECT, OFF(tb_frame)},

{"tb_lasti", T_INT, OFF(tb_lasti)},

{"tb_lineno", T_INT, OFF(tb_lineno)},

{NULL} /* Sentinel */

};

static PyObject *

tb_getattr(PyTracebackObject *tb, char *name)

{

return PyMember_Get((char *)tb, tb_memberlist, name);

}

static void

tb_dealloc(PyTracebackObject *tb)

{

PyObject_GC_UnTrack(tb);

Py_TRASHCAN_SAFE_BEGIN(tb)

Py_XDECREF(tb->tb_next);

Py_XDECREF(tb->tb_frame);

PyObject_GC_Del(tb);

Py_TRASHCAN_SAFE_END(tb)

}

static int

tb_traverse(PyTracebackObject *tb, visitproc visit, void *arg)

{

Py_VISIT(tb->tb_next);

Py_VISIT(tb->tb_frame);

return 0;

}

static void

tb_clear(PyTracebackObject *tb)

{

Py_CLEAR(tb->tb_next);

Py_CLEAR(tb->tb_frame);

}

PyTypeObject PyTraceBack_Type = {

PyVarObject_HEAD_INIT(&PyType_Type, 0)

"traceback",

sizeof(PyTracebackObject),

(destructor)tb_dealloc, /*tp_dealloc*/

0, /*tp_print*/

(getattrfunc)tb_getattr, /*tp_getattr*/

0, /*tp_setattr*/

0, /*tp_compare*/

0, /*tp_repr*/

0, /*tp_as_number*/

0, /*tp_as_sequence*/

0, /*tp_as_mapping*/

0, /* tp_hash */

0, /* tp_call */

0, /* tp_str */

0, /* tp_getattro */

0, /* tp_setattro */

0, /* tp_as_buffer */

Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */

0, /* tp_doc */

(traverseproc)tb_traverse, /* tp_traverse */

(inquiry)tb_clear, /* tp_clear */

0, /* tp_richcompare */

0, /* tp_weaklistoffset */

0, /* tp_iter */

0, /* tp_iternext */

0, /* tp_methods */

0, /* tp_members */

0, /* tp_getset */

0, /* tp_base */

0, /* tp_dict */

};

static PyTracebackObject *

newtracebackobject(PyTracebackObject *next, PyFrameObject *frame)

{

PyTracebackObject *tb;

if ((next != NULL && !PyTraceBack_Check(next)) ||

frame == NULL || !PyFrame_Check(frame)) {

PyErr_BadInternalCall();

return NULL;

}

tb = PyObject_GC_New(PyTracebackObject, &PyTraceBack_Type);

if (tb != NULL) {

Py_XINCREF(next);

tb->tb_next = next;

Py_XINCREF(frame);

tb->tb_frame = frame;

tb->tb_lasti = frame->f_lasti;

tb->tb_lineno = PyCode_Addr2Line(frame->f_code,

frame->f_lasti);

PyObject_GC_Track(tb);

}

return tb;

}

int

PyTraceBack_Here(PyFrameObject *frame)

{

PyThreadState *tstate = PyThreadState_GET();

PyTracebackObject *oldtb = (PyTracebackObject *) tstate->curexc_traceback;

PyTracebackObject *tb = newtracebackobject(oldtb, frame);

if (tb == NULL)

return -1;

tstate->curexc_traceback = (PyObject *)tb;

Py_XDECREF(oldtb);

return 0;

}

int

_Py_DisplaySourceLine(PyObject *f, const char *filename, int lineno, int indent)

{

int err = 0;

FILE *xfp = NULL;

char linebuf[2000];

int i;

char namebuf[MAXPATHLEN+1];

if (filename == NULL)

return -1;

/* This is needed by Emacs' compile command */

#define FMT " File \"%.500s\", line %d, in %.500s\n"

xfp = fopen(filename, "r" PY_STDIOTEXTMODE);

if (xfp == NULL) {

/* Search tail of filename in sys.path before giving up */

PyObject *path;

const char *tail = strrchr(filename, SEP);

if (tail == NULL)

tail = filename;

else

tail++;

path = PySys_GetObject("path");

if (path != NULL && PyList_Check(path)) {

Py_ssize_t _npath = PyList_Size(path);

int npath = Py_SAFE_DOWNCAST(_npath, Py_ssize_t, int);

size_t taillen = strlen(tail);

for (i = 0; i < npath; i++) {

PyObject *v = PyList_GetItem(path, i);

if (v == NULL) {

PyErr_Clear();

break;

}

if (PyString_Check(v)) {

size_t len;

len = PyString_GET_SIZE(v);

if (len + 1 + taillen >= MAXPATHLEN)

continue; /* Too long */

strcpy(namebuf, PyString_AsString(v));

if (strlen(namebuf) != len)

continue; /* v contains '\0' */

if (len > 0 && namebuf[len-1] != SEP)

namebuf[len++] = SEP;

strcpy(namebuf+len, tail);

xfp = fopen(namebuf, "r" PY_STDIOTEXTMODE);

if (xfp != NULL) {

filename = namebuf;

break;

}

if (xfp == NULL)

return err;

if (err != 0) {

fclose(xfp);

return err;

}

for (i = 0; i < lineno; i++) {

char* pLastChar = &linebuf[sizeof(linebuf)-2];

do {

*pLastChar = '\0';

if (Py_UniversalNewlineFgets(linebuf, sizeof linebuf, xfp, NULL) == NULL)

break;

/* fgets read *something*; if it didn't get as

far as pLastChar, it must have found a newline

or hit the end of the file; if pLastChar is \n,

it obviously found a newline; else we haven't

yet seen a newline, so must continue */

} while (*pLastChar != '\0' && *pLastChar != '\n');

}

if (i == lineno) {

char buf[11];

char *p = linebuf;

while (*p == ' ' || *p == '\t' || *p == '\014')

p++;

/* Write some spaces before the line */

strcpy(buf, " ");

assert (strlen(buf) == 10);

while (indent > 0) {

if(indent < 10)

buf[indent] = '\0';

err = PyFile_WriteString(buf, f);

if (err != 0)

break;

indent -= 10;

}

if (err == 0)

err = PyFile_WriteString(p, f);

if (err == 0 && strchr(p, '\n') == NULL)

err = PyFile_WriteString("\n", f);

}

fclose(xfp);

return err;

}

static int

tb_displayline(PyObject *f, const char *filename, int lineno, const char *name)

{

int err = 0;

char linebuf[2000];

if (filename == NULL || name == NULL)

return -1;

/* This is needed by Emacs' compile command */

#define FMT " File \"%.500s\", line %d, in %.500s\n"

PyOS_snprintf(linebuf, sizeof(linebuf), FMT, filename, lineno, name);

err = PyFile_WriteString(linebuf, f);

if (err != 0)

return err;

return _Py_DisplaySourceLine(f, filename, lineno, 4);

}

static int

tb_printinternal(PyTracebackObject *tb, PyObject *f, long limit)

{

int err = 0;

long depth = 0;

PyTracebackObject *tb1 = tb;

while (tb1 != NULL) {

depth++;

tb1 = tb1->tb_next;

}

while (tb != NULL && err == 0) {

if (depth <= limit) {

err = tb_displayline(f,

PyString_AsString(

tb->tb_frame->f_code->co_filename),

tb->tb_lineno,

PyString_AsString(tb->tb_frame->f_code->co_name));

}

depth--;

tb = tb->tb_next;

if (err == 0)

err = PyErr_CheckSignals();

}

return err;

}

int

PyTraceBack_Print(PyObject *v, PyObject *f)

{

int err;

PyObject *limitv;

long limit = 1000;

if (v == NULL)

return 0;

if (!PyTraceBack_Check(v)) {

PyErr_BadInternalCall();

return -1;

}

limitv = PySys_GetObject("tracebacklimit");

if (limitv && PyInt_Check(limitv)) {

limit = PyInt_AsLong(limitv);

if (limit <= 0)

return 0;

}

err = PyFile_WriteString("Traceback (most recent call last):\n", f);

if (!err)

err = tb_printinternal((PyTracebackObject *)v, f, limit);

return err;

}

python/Python/traceback.c at master · sinneb/python · GitHub

Expand file tree

Breadcrumbs

traceback.c

Latest commit

History

Breadcrumbs

traceback.c

File metadata and controls