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Dobatymoeryksun
Dobatymo
and
eryksun
authored
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Co-authored-by: Eryk Sun <[email protected]>
1 parent 6aeaa32 commit 9737f22

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‎Modules/mmapmodule.c

Lines changed: 56 additions & 32 deletions
Original file line numberDiff line numberDiff line change
@@ -256,28 +256,31 @@ do { \
256256
} while (0)
257257
#endif /* UNIX */
258258

259-
#if defined(MS_WIN32) && !defined(DONT_USE_SEH)
259+
#if defined(MS_WINDOWS) && !defined(DONT_USE_SEH)
260260
static DWORD
261261
filter_page_exception(EXCEPTION_POINTERS *ptrs, EXCEPTION_RECORD *record)
262262
{
263263
*record = *ptrs->ExceptionRecord;
264-
if (record->ExceptionCode == EXCEPTION_IN_PAGE_ERROR
265-
|| record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
264+
if (record->ExceptionCode == EXCEPTION_IN_PAGE_ERROR ||
265+
record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION)
266+
{
266267
return EXCEPTION_EXECUTE_HANDLER;
267268
}
268269
return EXCEPTION_CONTINUE_SEARCH;
269270
}
270271

271272
static DWORD
272-
filter_page_exception_method(mmap_object *self, EXCEPTION_POINTERS *ptrs, EXCEPTION_RECORD *record)
273+
filter_page_exception_method(mmap_object *self, EXCEPTION_POINTERS *ptrs,
274+
EXCEPTION_RECORD *record)
273275
{
274276
*record = *ptrs->ExceptionRecord;
275-
if (record->ExceptionCode == EXCEPTION_IN_PAGE_ERROR
276-
|| record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
277+
if (record->ExceptionCode == EXCEPTION_IN_PAGE_ERROR ||
278+
record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION)
279+
{
277280

278281
ULONG_PTR address = record->ExceptionInformation[1];
279-
if (address >= (ULONG_PTR) self->data
280-
&& address < (ULONG_PTR) self->data + (ULONG_PTR) self->size)
282+
if (address >= (ULONG_PTR) self->data &&
283+
address < (ULONG_PTR) self->data + (ULONG_PTR) self->size)
281284
{
282285
return EXCEPTION_EXECUTE_HANDLER;
283286
}
@@ -286,16 +289,16 @@ filter_page_exception_method(mmap_object *self, EXCEPTION_POINTERS *ptrs, EXCEPT
286289
}
287290
#endif
288291

289-
#if defined(MS_WIN32) && !defined(DONT_USE_SEH)
292+
#if defined(MS_WINDOWS) && !defined(DONT_USE_SEH)
290293
#define HANDLE_INVALID_MEM(sourcecode) \
291294
do { \
292295
EXCEPTION_RECORD record; \
293296
__try { \
294297
sourcecode \
295298
} \
296299
__except (filter_page_exception(GetExceptionInformation(), &record)) { \
297-
assert(record.ExceptionCode == EXCEPTION_IN_PAGE_ERROR \
298-
|| record.ExceptionCode == EXCEPTION_ACCESS_VIOLATION); \
300+
assert(record.ExceptionCode == EXCEPTION_IN_PAGE_ERROR || \
301+
record.ExceptionCode == EXCEPTION_ACCESS_VIOLATION); \
299302
if (record.ExceptionCode == EXCEPTION_IN_PAGE_ERROR) { \
300303
NTSTATUS status = (NTSTATUS) record.ExceptionInformation[2]; \
301304
ULONG code = LsaNtStatusToWinError(status); \
@@ -314,16 +317,16 @@ do { \
314317
} while (0)
315318
#endif
316319

317-
#if defined(MS_WIN32) && !defined(DONT_USE_SEH)
320+
#if defined(MS_WINDOWS) && !defined(DONT_USE_SEH)
318321
#define HANDLE_INVALID_MEM_METHOD(self, sourcecode) \
319322
do { \
320323
EXCEPTION_RECORD record; \
321324
__try { \
322325
sourcecode \
323326
} \
324327
__except (filter_page_exception_method(self, GetExceptionInformation(), &record)) { \
325-
assert(record.ExceptionCode == EXCEPTION_IN_PAGE_ERROR \
326-
|| record.ExceptionCode == EXCEPTION_ACCESS_VIOLATION); \
328+
assert(record.ExceptionCode == EXCEPTION_IN_PAGE_ERROR || \
329+
record.ExceptionCode == EXCEPTION_ACCESS_VIOLATION); \
327330
if (record.ExceptionCode == EXCEPTION_IN_PAGE_ERROR) { \
328331
NTSTATUS status = (NTSTATUS) record.ExceptionInformation[2]; \
329332
ULONG code = LsaNtStatusToWinError(status); \
@@ -343,39 +346,45 @@ do {
343346
#endif
344347

345348
int
346-
safe_memcpy(void *restrict dest, const void *restrict src, size_t count) {
349+
safe_memcpy(void *restrict dest, const void *restrict src, size_t count)
350+
{
347351
HANDLE_INVALID_MEM(
348352
memcpy(dest, src, count);
349353
);
350354
return 0;
351355
}
352356

353357
int
354-
safe_byte_copy(char *dest, const char *src) {
358+
safe_byte_copy(char *dest, const char *src)
359+
{
355360
HANDLE_INVALID_MEM(
356361
*dest = *src;
357362
);
358363
return 0;
359364
}
360365

361366
int
362-
safe_memchr(char **out, const void *ptr, int ch, size_t count) {
367+
safe_memchr(char **out, const void *ptr, int ch, size_t count)
368+
{
363369
HANDLE_INVALID_MEM(
364370
*out = (char *) memchr(ptr, ch, count);
365371
);
366372
return 0;
367373
}
368374

369375
int
370-
safe_memmove(void *dest, const void *src, size_t count) {
376+
safe_memmove(void *dest, const void *src, size_t count)
377+
{
371378
HANDLE_INVALID_MEM(
372379
memmove(dest, src, count);
373380
);
374381
return 0;
375382
}
376383

377384
int
378-
safe_copy_from_slice(char *dest, const char *src, Py_ssize_t start, Py_ssize_t step, Py_ssize_t slicelen) {
385+
safe_copy_from_slice(char *dest, const char *src, Py_ssize_t start,
386+
Py_ssize_t step, Py_ssize_t slicelen)
387+
{
379388
HANDLE_INVALID_MEM(
380389
size_t cur;
381390
Py_ssize_t i;
@@ -387,7 +396,9 @@ safe_copy_from_slice(char *dest, const char *src, Py_ssize_t start, Py_ssize_t s
387396
}
388397

389398
int
390-
safe_copy_to_slice(char *dest, const char *src, Py_ssize_t start, Py_ssize_t step, Py_ssize_t slicelen) {
399+
safe_copy_to_slice(char *dest, const char *src, Py_ssize_t start,
400+
Py_ssize_t step, Py_ssize_t slicelen)
401+
{
391402
HANDLE_INVALID_MEM(
392403
size_t cur;
393404
Py_ssize_t i;
@@ -401,20 +412,24 @@ safe_copy_to_slice(char *dest, const char *src, Py_ssize_t start, Py_ssize_t ste
401412

402413
int
403414
_safe_PyBytes_Find(Py_ssize_t *out, mmap_object *self, const char *haystack,
404-
Py_ssize_t len_haystack, const char *needle, Py_ssize_t len_needle,
405-
Py_ssize_t offset) {
415+
Py_ssize_t len_haystack, const char *needle,
416+
Py_ssize_t len_needle, Py_ssize_t offset)
417+
{
406418
HANDLE_INVALID_MEM_METHOD(self,
407419
*out = _PyBytes_Find(haystack, len_haystack, needle, len_needle, offset);
408420
);
409421
return 0;
410422
}
411423

412424
int
413-
_safe_PyBytes_ReverseFind(Py_ssize_t *out, mmap_object *self, const char *haystack,
414-
Py_ssize_t len_haystack, const char *needle, Py_ssize_t len_needle,
415-
Py_ssize_t offset) {
425+
_safe_PyBytes_ReverseFind(Py_ssize_t *out, mmap_object *self,
426+
const char *haystack, Py_ssize_t len_haystack,
427+
const char *needle, Py_ssize_t len_needle,
428+
Py_ssize_t offset)
429+
{
416430
HANDLE_INVALID_MEM_METHOD(self,
417-
*out = _PyBytes_ReverseFind(haystack, len_haystack, needle, len_needle, offset);
431+
*out = _PyBytes_ReverseFind(haystack, len_haystack, needle, len_needle,
432+
offset);
418433
);
419434
return 0;
420435
}
@@ -505,7 +520,8 @@ mmap_read_method(mmap_object *self,
505520
if (num_bytes < 0 || num_bytes > remaining)
506521
num_bytes = remaining;
507522

508-
PyObject *result = _safe_PyBytes_FromStringAndSize(self->data + self->pos, num_bytes);
523+
PyObject *result = _safe_PyBytes_FromStringAndSize(self->data + self->pos,
524+
num_bytes);
509525
if (result != NULL) {
510526
self->pos += num_bytes;
511527
}
@@ -551,7 +567,8 @@ mmap_gfind(mmap_object *self,
551567
assert(0 <= start && start <= end && end <= self->size);
552568
if (_safe_PyBytes_ReverseFind(&index, self,
553569
self->data + start, end - start,
554-
view.buf, view.len, start) < 0) {
570+
view.buf, view.len, start) < 0)
571+
{
555572
result = NULL;
556573
}
557574
else {
@@ -562,7 +579,8 @@ mmap_gfind(mmap_object *self,
562579
assert(0 <= start && start <= end && end <= self->size);
563580
if (_safe_PyBytes_Find(&index, self,
564581
self->data + start, end - start,
565-
view.buf, view.len, start) < 0) {
582+
view.buf, view.len, start) < 0)
583+
{
566584
result = NULL;
567585
}
568586
else {
@@ -1087,7 +1105,9 @@ mmap_protect_method(mmap_object *self, PyObject *args) {
10871105
return NULL;
10881106
}
10891107

1090-
if (VirtualProtect((void *) (self->data + start), length, flNewProtect, &flOldProtect) == 0) {
1108+
if (!VirtualProtect((void *) (self->data + start), length, flNewProtect,
1109+
&flOldProtect))
1110+
{
10911111
PyErr_SetFromWindowsErr(GetLastError());
10921112
return NULL;
10931113
}
@@ -1263,7 +1283,9 @@ mmap_subscript(mmap_object *self, PyObject *item)
12631283
if (result_buf == NULL)
12641284
return PyErr_NoMemory();
12651285

1266-
if (safe_copy_to_slice(result_buf, self->data, start, step, slicelen) < 0) {
1286+
if (safe_copy_to_slice(result_buf, self->data, start, step,
1287+
slicelen) < 0)
1288+
{
12671289
result = NULL;
12681290
}
12691291
else {
@@ -1390,7 +1412,9 @@ mmap_ass_subscript(mmap_object *self, PyObject *item, PyObject *value)
13901412
}
13911413
}
13921414
else {
1393-
if (safe_copy_from_slice(self->data, (char *)vbuf.buf, start, step, slicelen) < 0) {
1415+
if (safe_copy_from_slice(self->data, (char *)vbuf.buf, start, step,
1416+
slicelen) < 0)
1417+
{
13941418
result = -1;
13951419
}
13961420
}

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