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| 1 /* C-based Tracer for Coverage. */ | |
| 2 | |
| 3 #include "Python.h" | |
| 4 #include "compile.h" /* in 2.3, this wasn't part of Python.h */ | |
| 5 #include "eval.h" /* or this. */ | |
| 6 #include "structmember.h" | |
| 7 #include "frameobject.h" | |
| 8 | |
| 9 /* Compile-time debugging helpers */ | |
| 10 #undef WHAT_LOG /* Define to log the WHAT params in the trace function.
*/ | |
| 11 #undef TRACE_LOG /* Define to log our bookkeeping. */ | |
| 12 #undef COLLECT_STATS /* Collect counters: stats are printed when tracer is st
opped. */ | |
| 13 | |
| 14 #if COLLECT_STATS | |
| 15 #define STATS(x) x | |
| 16 #else | |
| 17 #define STATS(x) | |
| 18 #endif | |
| 19 | |
| 20 /* Py 2.x and 3.x compatibility */ | |
| 21 | |
| 22 #ifndef Py_TYPE | |
| 23 #define Py_TYPE(o) (((PyObject*)(o))->ob_type) | |
| 24 #endif | |
| 25 | |
| 26 #if PY_MAJOR_VERSION >= 3 | |
| 27 | |
| 28 #define MyText_Type PyUnicode_Type | |
| 29 #define MyText_Check(o) PyUnicode_Check(o) | |
| 30 #define MyText_AS_BYTES(o) PyUnicode_AsASCIIString(o) | |
| 31 #define MyText_AS_STRING(o) PyBytes_AS_STRING(o) | |
| 32 #define MyInt_FromLong(l) PyLong_FromLong(l) | |
| 33 | |
| 34 #define MyType_HEAD_INIT PyVarObject_HEAD_INIT(NULL, 0) | |
| 35 | |
| 36 #else | |
| 37 | |
| 38 #define MyText_Type PyString_Type | |
| 39 #define MyText_Check(o) PyString_Check(o) | |
| 40 #define MyText_AS_BYTES(o) (Py_INCREF(o), o) | |
| 41 #define MyText_AS_STRING(o) PyString_AS_STRING(o) | |
| 42 #define MyInt_FromLong(l) PyInt_FromLong(l) | |
| 43 | |
| 44 #define MyType_HEAD_INIT PyObject_HEAD_INIT(NULL) 0, | |
| 45 | |
| 46 #endif /* Py3k */ | |
| 47 | |
| 48 /* The values returned to indicate ok or error. */ | |
| 49 #define RET_OK 0 | |
| 50 #define RET_ERROR -1 | |
| 51 | |
| 52 /* An entry on the data stack. For each call frame, we need to record the | |
| 53 dictionary to capture data, and the last line number executed in that | |
| 54 frame. | |
| 55 */ | |
| 56 typedef struct { | |
| 57 PyObject * file_data; /* PyMem_Malloc'ed, a borrowed ref. */ | |
| 58 int last_line; | |
| 59 } DataStackEntry; | |
| 60 | |
| 61 /* The CTracer type. */ | |
| 62 | |
| 63 typedef struct { | |
| 64 PyObject_HEAD | |
| 65 | |
| 66 /* Python objects manipulated directly by the Collector class. */ | |
| 67 PyObject * should_trace; | |
| 68 PyObject * warn; | |
| 69 PyObject * data; | |
| 70 PyObject * should_trace_cache; | |
| 71 PyObject * arcs; | |
| 72 | |
| 73 /* Has the tracer been started? */ | |
| 74 int started; | |
| 75 /* Are we tracing arcs, or just lines? */ | |
| 76 int tracing_arcs; | |
| 77 | |
| 78 /* | |
| 79 The data stack is a stack of dictionaries. Each dictionary collects | |
| 80 data for a single source file. The data stack parallels the call stack: | |
| 81 each call pushes the new frame's file data onto the data stack, and each | |
| 82 return pops file data off. | |
| 83 | |
| 84 The file data is a dictionary whose form depends on the tracing options. | |
| 85 If tracing arcs, the keys are line number pairs. If not tracing arcs, | |
| 86 the keys are line numbers. In both cases, the value is irrelevant | |
| 87 (None). | |
| 88 */ | |
| 89 /* The index of the last-used entry in data_stack. */ | |
| 90 int depth; | |
| 91 /* The file data at each level, or NULL if not recording. */ | |
| 92 DataStackEntry * data_stack; | |
| 93 int data_stack_alloc; /* number of entries allocated at data_stack. */ | |
| 94 | |
| 95 /* The current file_data dictionary. Borrowed. */ | |
| 96 PyObject * cur_file_data; | |
| 97 | |
| 98 /* The line number of the last line recorded, for tracing arcs. | |
| 99 -1 means there was no previous line, as when entering a code object. | |
| 100 */ | |
| 101 int last_line; | |
| 102 | |
| 103 /* The parent frame for the last exception event, to fix missing returns. */ | |
| 104 PyFrameObject * last_exc_back; | |
| 105 int last_exc_firstlineno; | |
| 106 | |
| 107 #if COLLECT_STATS | |
| 108 struct { | |
| 109 unsigned int calls; | |
| 110 unsigned int lines; | |
| 111 unsigned int returns; | |
| 112 unsigned int exceptions; | |
| 113 unsigned int others; | |
| 114 unsigned int new_files; | |
| 115 unsigned int missed_returns; | |
| 116 unsigned int stack_reallocs; | |
| 117 unsigned int errors; | |
| 118 } stats; | |
| 119 #endif /* COLLECT_STATS */ | |
| 120 } CTracer; | |
| 121 | |
| 122 #define STACK_DELTA 100 | |
| 123 | |
| 124 static int | |
| 125 CTracer_init(CTracer *self, PyObject *args_unused, PyObject *kwds_unused) | |
| 126 { | |
| 127 #if COLLECT_STATS | |
| 128 self->stats.calls = 0; | |
| 129 self->stats.lines = 0; | |
| 130 self->stats.returns = 0; | |
| 131 self->stats.exceptions = 0; | |
| 132 self->stats.others = 0; | |
| 133 self->stats.new_files = 0; | |
| 134 self->stats.missed_returns = 0; | |
| 135 self->stats.stack_reallocs = 0; | |
| 136 self->stats.errors = 0; | |
| 137 #endif /* COLLECT_STATS */ | |
| 138 | |
| 139 self->should_trace = NULL; | |
| 140 self->warn = NULL; | |
| 141 self->data = NULL; | |
| 142 self->should_trace_cache = NULL; | |
| 143 self->arcs = NULL; | |
| 144 | |
| 145 self->started = 0; | |
| 146 self->tracing_arcs = 0; | |
| 147 | |
| 148 self->depth = -1; | |
| 149 self->data_stack = PyMem_Malloc(STACK_DELTA*sizeof(DataStackEntry)); | |
| 150 if (self->data_stack == NULL) { | |
| 151 STATS( self->stats.errors++; ) | |
| 152 PyErr_NoMemory(); | |
| 153 return RET_ERROR; | |
| 154 } | |
| 155 self->data_stack_alloc = STACK_DELTA; | |
| 156 | |
| 157 self->cur_file_data = NULL; | |
| 158 self->last_line = -1; | |
| 159 | |
| 160 self->last_exc_back = NULL; | |
| 161 | |
| 162 return RET_OK; | |
| 163 } | |
| 164 | |
| 165 static void | |
| 166 CTracer_dealloc(CTracer *self) | |
| 167 { | |
| 168 if (self->started) { | |
| 169 PyEval_SetTrace(NULL, NULL); | |
| 170 } | |
| 171 | |
| 172 Py_XDECREF(self->should_trace); | |
| 173 Py_XDECREF(self->warn); | |
| 174 Py_XDECREF(self->data); | |
| 175 Py_XDECREF(self->should_trace_cache); | |
| 176 | |
| 177 PyMem_Free(self->data_stack); | |
| 178 | |
| 179 Py_TYPE(self)->tp_free((PyObject*)self); | |
| 180 } | |
| 181 | |
| 182 #if TRACE_LOG | |
| 183 static const char * | |
| 184 indent(int n) | |
| 185 { | |
| 186 static const char * spaces = | |
| 187 " " | |
| 188 " " | |
| 189 " " | |
| 190 " " | |
| 191 ; | |
| 192 return spaces + strlen(spaces) - n*2; | |
| 193 } | |
| 194 | |
| 195 static int logging = 0; | |
| 196 /* Set these constants to be a file substring and line number to start logging.
*/ | |
| 197 static const char * start_file = "tests/views"; | |
| 198 static int start_line = 27; | |
| 199 | |
| 200 static void | |
| 201 showlog(int depth, int lineno, PyObject * filename, const char * msg) | |
| 202 { | |
| 203 if (logging) { | |
| 204 printf("%s%3d ", indent(depth), depth); | |
| 205 if (lineno) { | |
| 206 printf("%4d", lineno); | |
| 207 } | |
| 208 else { | |
| 209 printf(" "); | |
| 210 } | |
| 211 if (filename) { | |
| 212 PyObject *ascii = MyText_AS_BYTES(filename); | |
| 213 printf(" %s", MyText_AS_STRING(ascii)); | |
| 214 Py_DECREF(ascii); | |
| 215 } | |
| 216 if (msg) { | |
| 217 printf(" %s", msg); | |
| 218 } | |
| 219 printf("\n"); | |
| 220 } | |
| 221 } | |
| 222 | |
| 223 #define SHOWLOG(a,b,c,d) showlog(a,b,c,d) | |
| 224 #else | |
| 225 #define SHOWLOG(a,b,c,d) | |
| 226 #endif /* TRACE_LOG */ | |
| 227 | |
| 228 #if WHAT_LOG | |
| 229 static const char * what_sym[] = {"CALL", "EXC ", "LINE", "RET "}; | |
| 230 #endif | |
| 231 | |
| 232 /* Record a pair of integers in self->cur_file_data. */ | |
| 233 static int | |
| 234 CTracer_record_pair(CTracer *self, int l1, int l2) | |
| 235 { | |
| 236 int ret = RET_OK; | |
| 237 | |
| 238 PyObject * t = Py_BuildValue("(ii)", l1, l2); | |
| 239 if (t != NULL) { | |
| 240 if (PyDict_SetItem(self->cur_file_data, t, Py_None) < 0) { | |
| 241 STATS( self->stats.errors++; ) | |
| 242 ret = RET_ERROR; | |
| 243 } | |
| 244 Py_DECREF(t); | |
| 245 } | |
| 246 else { | |
| 247 STATS( self->stats.errors++; ) | |
| 248 ret = RET_ERROR; | |
| 249 } | |
| 250 return ret; | |
| 251 } | |
| 252 | |
| 253 /* | |
| 254 * The Trace Function | |
| 255 */ | |
| 256 static int | |
| 257 CTracer_trace(CTracer *self, PyFrameObject *frame, int what, PyObject *arg_unuse
d) | |
| 258 { | |
| 259 int ret = RET_OK; | |
| 260 PyObject * filename = NULL; | |
| 261 PyObject * tracename = NULL; | |
| 262 #if WHAT_LOG || TRACE_LOG | |
| 263 PyObject * ascii = NULL; | |
| 264 #endif | |
| 265 | |
| 266 #if WHAT_LOG | |
| 267 if (what <= sizeof(what_sym)/sizeof(const char *)) { | |
| 268 ascii = MyText_AS_BYTES(frame->f_code->co_filename); | |
| 269 printf("trace: %s @ %s %d\n", what_sym[what], MyText_AS_STRING(ascii), f
rame->f_lineno); | |
| 270 Py_DECREF(ascii); | |
| 271 } | |
| 272 #endif | |
| 273 | |
| 274 #if TRACE_LOG | |
| 275 ascii = MyText_AS_BYTES(frame->f_code->co_filename); | |
| 276 if (strstr(MyText_AS_STRING(ascii), start_file) && frame->f_lineno == start_
line) { | |
| 277 logging = 1; | |
| 278 } | |
| 279 Py_DECREF(ascii); | |
| 280 #endif | |
| 281 | |
| 282 /* See below for details on missing-return detection. */ | |
| 283 if (self->last_exc_back) { | |
| 284 if (frame == self->last_exc_back) { | |
| 285 /* Looks like someone forgot to send a return event. We'll clear | |
| 286 the exception state and do the RETURN code here. Notice that the | |
| 287 frame we have in hand here is not the correct frame for the RETUR
N, | |
| 288 that frame is gone. Our handling for RETURN doesn't need the | |
| 289 actual frame, but we do log it, so that will look a little off if | |
| 290 you're looking at the detailed log. | |
| 291 | |
| 292 If someday we need to examine the frame when doing RETURN, then | |
| 293 we'll need to keep more of the missed frame's state. | |
| 294 */ | |
| 295 STATS( self->stats.missed_returns++; ) | |
| 296 if (self->depth >= 0) { | |
| 297 if (self->tracing_arcs && self->cur_file_data) { | |
| 298 if (CTracer_record_pair(self, self->last_line, -self->last_e
xc_firstlineno) < 0) { | |
| 299 return RET_ERROR; | |
| 300 } | |
| 301 } | |
| 302 SHOWLOG(self->depth, frame->f_lineno, frame->f_code->co_filename
, "missedreturn"); | |
| 303 self->cur_file_data = self->data_stack[self->depth].file_data; | |
| 304 self->last_line = self->data_stack[self->depth].last_line; | |
| 305 self->depth--; | |
| 306 } | |
| 307 } | |
| 308 self->last_exc_back = NULL; | |
| 309 } | |
| 310 | |
| 311 | |
| 312 switch (what) { | |
| 313 case PyTrace_CALL: /* 0 */ | |
| 314 STATS( self->stats.calls++; ) | |
| 315 /* Grow the stack. */ | |
| 316 self->depth++; | |
| 317 if (self->depth >= self->data_stack_alloc) { | |
| 318 STATS( self->stats.stack_reallocs++; ) | |
| 319 /* We've outgrown our data_stack array: make it bigger. */ | |
| 320 int bigger = self->data_stack_alloc + STACK_DELTA; | |
| 321 DataStackEntry * bigger_data_stack = PyMem_Realloc(self->data_stack,
bigger * sizeof(DataStackEntry)); | |
| 322 if (bigger_data_stack == NULL) { | |
| 323 STATS( self->stats.errors++; ) | |
| 324 PyErr_NoMemory(); | |
| 325 self->depth--; | |
| 326 return RET_ERROR; | |
| 327 } | |
| 328 self->data_stack = bigger_data_stack; | |
| 329 self->data_stack_alloc = bigger; | |
| 330 } | |
| 331 | |
| 332 /* Push the current state on the stack. */ | |
| 333 self->data_stack[self->depth].file_data = self->cur_file_data; | |
| 334 self->data_stack[self->depth].last_line = self->last_line; | |
| 335 | |
| 336 /* Check if we should trace this line. */ | |
| 337 filename = frame->f_code->co_filename; | |
| 338 tracename = PyDict_GetItem(self->should_trace_cache, filename); | |
| 339 if (tracename == NULL) { | |
| 340 STATS( self->stats.new_files++; ) | |
| 341 /* We've never considered this file before. */ | |
| 342 /* Ask should_trace about it. */ | |
| 343 PyObject * args = Py_BuildValue("(OO)", filename, frame); | |
| 344 tracename = PyObject_Call(self->should_trace, args, NULL); | |
| 345 Py_DECREF(args); | |
| 346 if (tracename == NULL) { | |
| 347 /* An error occurred inside should_trace. */ | |
| 348 STATS( self->stats.errors++; ) | |
| 349 return RET_ERROR; | |
| 350 } | |
| 351 if (PyDict_SetItem(self->should_trace_cache, filename, tracename) <
0) { | |
| 352 STATS( self->stats.errors++; ) | |
| 353 return RET_ERROR; | |
| 354 } | |
| 355 } | |
| 356 else { | |
| 357 Py_INCREF(tracename); | |
| 358 } | |
| 359 | |
| 360 /* If tracename is a string, then we're supposed to trace. */ | |
| 361 if (MyText_Check(tracename)) { | |
| 362 PyObject * file_data = PyDict_GetItem(self->data, tracename); | |
| 363 if (file_data == NULL) { | |
| 364 file_data = PyDict_New(); | |
| 365 if (file_data == NULL) { | |
| 366 STATS( self->stats.errors++; ) | |
| 367 return RET_ERROR; | |
| 368 } | |
| 369 ret = PyDict_SetItem(self->data, tracename, file_data); | |
| 370 Py_DECREF(file_data); | |
| 371 if (ret < 0) { | |
| 372 STATS( self->stats.errors++; ) | |
| 373 return RET_ERROR; | |
| 374 } | |
| 375 } | |
| 376 self->cur_file_data = file_data; | |
| 377 /* Make the frame right in case settrace(gettrace()) happens. */ | |
| 378 Py_INCREF(self); | |
| 379 frame->f_trace = (PyObject*)self; | |
| 380 SHOWLOG(self->depth, frame->f_lineno, filename, "traced"); | |
| 381 } | |
| 382 else { | |
| 383 self->cur_file_data = NULL; | |
| 384 SHOWLOG(self->depth, frame->f_lineno, filename, "skipped"); | |
| 385 } | |
| 386 | |
| 387 Py_DECREF(tracename); | |
| 388 | |
| 389 self->last_line = -1; | |
| 390 break; | |
| 391 | |
| 392 case PyTrace_RETURN: /* 3 */ | |
| 393 STATS( self->stats.returns++; ) | |
| 394 /* A near-copy of this code is above in the missing-return handler. */ | |
| 395 if (self->depth >= 0) { | |
| 396 if (self->tracing_arcs && self->cur_file_data) { | |
| 397 int first = frame->f_code->co_firstlineno; | |
| 398 if (CTracer_record_pair(self, self->last_line, -first) < 0) { | |
| 399 return RET_ERROR; | |
| 400 } | |
| 401 } | |
| 402 | |
| 403 SHOWLOG(self->depth, frame->f_lineno, frame->f_code->co_filename, "r
eturn"); | |
| 404 self->cur_file_data = self->data_stack[self->depth].file_data; | |
| 405 self->last_line = self->data_stack[self->depth].last_line; | |
| 406 self->depth--; | |
| 407 } | |
| 408 break; | |
| 409 | |
| 410 case PyTrace_LINE: /* 2 */ | |
| 411 STATS( self->stats.lines++; ) | |
| 412 if (self->depth >= 0) { | |
| 413 SHOWLOG(self->depth, frame->f_lineno, frame->f_code->co_filename, "l
ine"); | |
| 414 if (self->cur_file_data) { | |
| 415 /* We're tracing in this frame: record something. */ | |
| 416 if (self->tracing_arcs) { | |
| 417 /* Tracing arcs: key is (last_line,this_line). */ | |
| 418 if (CTracer_record_pair(self, self->last_line, frame->f_line
no) < 0) { | |
| 419 return RET_ERROR; | |
| 420 } | |
| 421 } | |
| 422 else { | |
| 423 /* Tracing lines: key is simply this_line. */ | |
| 424 PyObject * this_line = MyInt_FromLong(frame->f_lineno); | |
| 425 if (this_line == NULL) { | |
| 426 STATS( self->stats.errors++; ) | |
| 427 return RET_ERROR; | |
| 428 } | |
| 429 ret = PyDict_SetItem(self->cur_file_data, this_line, Py_None
); | |
| 430 Py_DECREF(this_line); | |
| 431 if (ret < 0) { | |
| 432 STATS( self->stats.errors++; ) | |
| 433 return RET_ERROR; | |
| 434 } | |
| 435 } | |
| 436 } | |
| 437 self->last_line = frame->f_lineno; | |
| 438 } | |
| 439 break; | |
| 440 | |
| 441 case PyTrace_EXCEPTION: | |
| 442 /* Some code (Python 2.3, and pyexpat anywhere) fires an exception event | |
| 443 without a return event. To detect that, we'll keep a copy of the | |
| 444 parent frame for an exception event. If the next event is in that | |
| 445 frame, then we must have returned without a return event. We can | |
| 446 synthesize the missing event then. | |
| 447 | |
| 448 Python itself fixed this problem in 2.4. Pyexpat still has the bug. | |
| 449 I've reported the problem with pyexpat as http://bugs.python.org/issu
e6359 . | |
| 450 If it gets fixed, this code should still work properly. Maybe some d
ay | |
| 451 the bug will be fixed everywhere coverage.py is supported, and we can | |
| 452 remove this missing-return detection. | |
| 453 | |
| 454 More about this fix: http://nedbatchelder.com/blog/200907/a_nasty_lit
tle_bug.html | |
| 455 */ | |
| 456 STATS( self->stats.exceptions++; ) | |
| 457 self->last_exc_back = frame->f_back; | |
| 458 self->last_exc_firstlineno = frame->f_code->co_firstlineno; | |
| 459 break; | |
| 460 | |
| 461 default: | |
| 462 STATS( self->stats.others++; ) | |
| 463 break; | |
| 464 } | |
| 465 | |
| 466 return RET_OK; | |
| 467 } | |
| 468 | |
| 469 /* | |
| 470 * Python has two ways to set the trace function: sys.settrace(fn), which | |
| 471 * takes a Python callable, and PyEval_SetTrace(func, obj), which takes | |
| 472 * a C function and a Python object. The way these work together is that | |
| 473 * sys.settrace(pyfn) calls PyEval_SetTrace(builtin_func, pyfn), using the | |
| 474 * Python callable as the object in PyEval_SetTrace. So sys.gettrace() | |
| 475 * simply returns the Python object used as the second argument to | |
| 476 * PyEval_SetTrace. So sys.gettrace() will return our self parameter, which | |
| 477 * means it must be callable to be used in sys.settrace(). | |
| 478 * | |
| 479 * So we make our self callable, equivalent to invoking our trace function. | |
| 480 * | |
| 481 * To help with the process of replaying stored frames, this function has an | |
| 482 * optional keyword argument: | |
| 483 * | |
| 484 * def CTracer_call(frame, event, arg, lineno=0) | |
| 485 * | |
| 486 * If provided, the lineno argument is used as the line number, and the | |
| 487 * frame's f_lineno member is ignored. | |
| 488 */ | |
| 489 static PyObject * | |
| 490 CTracer_call(CTracer *self, PyObject *args, PyObject *kwds) | |
| 491 { | |
| 492 PyFrameObject *frame; | |
| 493 PyObject *what_str; | |
| 494 PyObject *arg; | |
| 495 int lineno = 0; | |
| 496 int what; | |
| 497 int orig_lineno; | |
| 498 PyObject *ret = NULL; | |
| 499 | |
| 500 static char *what_names[] = { | |
| 501 "call", "exception", "line", "return", | |
| 502 "c_call", "c_exception", "c_return", | |
| 503 NULL | |
| 504 }; | |
| 505 | |
| 506 #if WHAT_LOG | |
| 507 printf("pytrace\n"); | |
| 508 #endif | |
| 509 | |
| 510 static char *kwlist[] = {"frame", "event", "arg", "lineno", NULL}; | |
| 511 | |
| 512 if (!PyArg_ParseTupleAndKeywords(args, kwds, "O!O!O|i:Tracer_call", kwlist, | |
| 513 &PyFrame_Type, &frame, &MyText_Type, &what_str, &arg, &lineno)) { | |
| 514 goto done; | |
| 515 } | |
| 516 | |
| 517 /* In Python, the what argument is a string, we need to find an int | |
| 518 for the C function. */ | |
| 519 for (what = 0; what_names[what]; what++) { | |
| 520 PyObject *ascii = MyText_AS_BYTES(what_str); | |
| 521 int should_break = !strcmp(MyText_AS_STRING(ascii), what_names[what]); | |
| 522 Py_DECREF(ascii); | |
| 523 if (should_break) { | |
| 524 break; | |
| 525 } | |
| 526 } | |
| 527 | |
| 528 /* Save off the frame's lineno, and use the forced one, if provided. */ | |
| 529 orig_lineno = frame->f_lineno; | |
| 530 if (lineno > 0) { | |
| 531 frame->f_lineno = lineno; | |
| 532 } | |
| 533 | |
| 534 /* Invoke the C function, and return ourselves. */ | |
| 535 if (CTracer_trace(self, frame, what, arg) == RET_OK) { | |
| 536 Py_INCREF(self); | |
| 537 ret = (PyObject *)self; | |
| 538 } | |
| 539 | |
| 540 /* Clean up. */ | |
| 541 frame->f_lineno = orig_lineno; | |
| 542 | |
| 543 done: | |
| 544 return ret; | |
| 545 } | |
| 546 | |
| 547 static PyObject * | |
| 548 CTracer_start(CTracer *self, PyObject *args_unused) | |
| 549 { | |
| 550 PyEval_SetTrace((Py_tracefunc)CTracer_trace, (PyObject*)self); | |
| 551 self->started = 1; | |
| 552 self->tracing_arcs = self->arcs && PyObject_IsTrue(self->arcs); | |
| 553 self->last_line = -1; | |
| 554 | |
| 555 /* start() returns a trace function usable with sys.settrace() */ | |
| 556 Py_INCREF(self); | |
| 557 return (PyObject *)self; | |
| 558 } | |
| 559 | |
| 560 static PyObject * | |
| 561 CTracer_stop(CTracer *self, PyObject *args_unused) | |
| 562 { | |
| 563 if (self->started) { | |
| 564 PyEval_SetTrace(NULL, NULL); | |
| 565 self->started = 0; | |
| 566 } | |
| 567 | |
| 568 return Py_BuildValue(""); | |
| 569 } | |
| 570 | |
| 571 static PyObject * | |
| 572 CTracer_get_stats(CTracer *self) | |
| 573 { | |
| 574 #if COLLECT_STATS | |
| 575 return Py_BuildValue( | |
| 576 "{sI,sI,sI,sI,sI,sI,sI,sI,si,sI}", | |
| 577 "calls", self->stats.calls, | |
| 578 "lines", self->stats.lines, | |
| 579 "returns", self->stats.returns, | |
| 580 "exceptions", self->stats.exceptions, | |
| 581 "others", self->stats.others, | |
| 582 "new_files", self->stats.new_files, | |
| 583 "missed_returns", self->stats.missed_returns, | |
| 584 "stack_reallocs", self->stats.stack_reallocs, | |
| 585 "stack_alloc", self->data_stack_alloc, | |
| 586 "errors", self->stats.errors | |
| 587 ); | |
| 588 #else | |
| 589 return Py_BuildValue(""); | |
| 590 #endif /* COLLECT_STATS */ | |
| 591 } | |
| 592 | |
| 593 static PyMemberDef | |
| 594 CTracer_members[] = { | |
| 595 { "should_trace", T_OBJECT, offsetof(CTracer, should_trace), 0, | |
| 596 PyDoc_STR("Function indicating whether to trace a file.") }, | |
| 597 | |
| 598 { "warn", T_OBJECT, offsetof(CTracer, warn), 0, | |
| 599 PyDoc_STR("Function for issuing warnings.") }, | |
| 600 | |
| 601 { "data", T_OBJECT, offsetof(CTracer, data), 0, | |
| 602 PyDoc_STR("The raw dictionary of trace data.") }, | |
| 603 | |
| 604 { "should_trace_cache", T_OBJECT, offsetof(CTracer, should_trace_cache), 0, | |
| 605 PyDoc_STR("Dictionary caching should_trace results.") }, | |
| 606 | |
| 607 { "arcs", T_OBJECT, offsetof(CTracer, arcs), 0, | |
| 608 PyDoc_STR("Should we trace arcs, or just lines?") }, | |
| 609 | |
| 610 { NULL } | |
| 611 }; | |
| 612 | |
| 613 static PyMethodDef | |
| 614 CTracer_methods[] = { | |
| 615 { "start", (PyCFunction) CTracer_start, METH_VARARGS, | |
| 616 PyDoc_STR("Start the tracer") }, | |
| 617 | |
| 618 { "stop", (PyCFunction) CTracer_stop, METH_VARARGS, | |
| 619 PyDoc_STR("Stop the tracer") }, | |
| 620 | |
| 621 { "get_stats", (PyCFunction) CTracer_get_stats, METH_VARARGS, | |
| 622 PyDoc_STR("Get statistics about the tracing") }, | |
| 623 | |
| 624 { NULL } | |
| 625 }; | |
| 626 | |
| 627 static PyTypeObject | |
| 628 CTracerType = { | |
| 629 MyType_HEAD_INIT | |
| 630 "coverage.CTracer", /*tp_name*/ | |
| 631 sizeof(CTracer), /*tp_basicsize*/ | |
| 632 0, /*tp_itemsize*/ | |
| 633 (destructor)CTracer_dealloc, /*tp_dealloc*/ | |
| 634 0, /*tp_print*/ | |
| 635 0, /*tp_getattr*/ | |
| 636 0, /*tp_setattr*/ | |
| 637 0, /*tp_compare*/ | |
| 638 0, /*tp_repr*/ | |
| 639 0, /*tp_as_number*/ | |
| 640 0, /*tp_as_sequence*/ | |
| 641 0, /*tp_as_mapping*/ | |
| 642 0, /*tp_hash */ | |
| 643 (ternaryfunc)CTracer_call, /*tp_call*/ | |
| 644 0, /*tp_str*/ | |
| 645 0, /*tp_getattro*/ | |
| 646 0, /*tp_setattro*/ | |
| 647 0, /*tp_as_buffer*/ | |
| 648 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/ | |
| 649 "CTracer objects", /* tp_doc */ | |
| 650 0, /* tp_traverse */ | |
| 651 0, /* tp_clear */ | |
| 652 0, /* tp_richcompare */ | |
| 653 0, /* tp_weaklistoffset */ | |
| 654 0, /* tp_iter */ | |
| 655 0, /* tp_iternext */ | |
| 656 CTracer_methods, /* tp_methods */ | |
| 657 CTracer_members, /* tp_members */ | |
| 658 0, /* tp_getset */ | |
| 659 0, /* tp_base */ | |
| 660 0, /* tp_dict */ | |
| 661 0, /* tp_descr_get */ | |
| 662 0, /* tp_descr_set */ | |
| 663 0, /* tp_dictoffset */ | |
| 664 (initproc)CTracer_init, /* tp_init */ | |
| 665 0, /* tp_alloc */ | |
| 666 0, /* tp_new */ | |
| 667 }; | |
| 668 | |
| 669 /* Module definition */ | |
| 670 | |
| 671 #define MODULE_DOC PyDoc_STR("Fast coverage tracer.") | |
| 672 | |
| 673 #if PY_MAJOR_VERSION >= 3 | |
| 674 | |
| 675 static PyModuleDef | |
| 676 moduledef = { | |
| 677 PyModuleDef_HEAD_INIT, | |
| 678 "coverage.tracer", | |
| 679 MODULE_DOC, | |
| 680 -1, | |
| 681 NULL, /* methods */ | |
| 682 NULL, | |
| 683 NULL, /* traverse */ | |
| 684 NULL, /* clear */ | |
| 685 NULL | |
| 686 }; | |
| 687 | |
| 688 | |
| 689 PyObject * | |
| 690 PyInit_tracer(void) | |
| 691 { | |
| 692 PyObject * mod = PyModule_Create(&moduledef); | |
| 693 if (mod == NULL) { | |
| 694 return NULL; | |
| 695 } | |
| 696 | |
| 697 CTracerType.tp_new = PyType_GenericNew; | |
| 698 if (PyType_Ready(&CTracerType) < 0) { | |
| 699 Py_DECREF(mod); | |
| 700 return NULL; | |
| 701 } | |
| 702 | |
| 703 Py_INCREF(&CTracerType); | |
| 704 PyModule_AddObject(mod, "CTracer", (PyObject *)&CTracerType); | |
| 705 | |
| 706 return mod; | |
| 707 } | |
| 708 | |
| 709 #else | |
| 710 | |
| 711 void | |
| 712 inittracer(void) | |
| 713 { | |
| 714 PyObject * mod; | |
| 715 | |
| 716 mod = Py_InitModule3("coverage.tracer", NULL, MODULE_DOC); | |
| 717 if (mod == NULL) { | |
| 718 return; | |
| 719 } | |
| 720 | |
| 721 CTracerType.tp_new = PyType_GenericNew; | |
| 722 if (PyType_Ready(&CTracerType) < 0) { | |
| 723 return; | |
| 724 } | |
| 725 | |
| 726 Py_INCREF(&CTracerType); | |
| 727 PyModule_AddObject(mod, "CTracer", (PyObject *)&CTracerType); | |
| 728 } | |
| 729 | |
| 730 #endif /* Py3k */ | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 225633007:
Upgrade to coverage 3.7.1 and have it auto-build itself on first use. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/tools/build