8000 bpo-23689: re module, fix memory leak when a match is terminated by a signal or memory allocation failure · Pull Request #32283 · python/cpython · GitHub
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bpo-23689: re module, fix memory leak when a match is terminated by a signal or memory allocation failure #32283

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Merged
merged 11 commits into from Apr 3, 2022
Merged

bpo-23689: re module, fix memory leak when a match is terminated by a signal or memory allocation failure #32283

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e5317fe
1. add variables
wjssz Apr 3, 2022
28e4d2d
2. add _CompileData class to _compile.py
wjssz Apr 3, 2022
7493fad
3. add repeat_count parameter to _sre.compile() function
wjssz Apr 3, 2022
b928335
4. emit repeat_count in sre_compile.py
wjssz Apr 3, 2022
dfec05d
5. change _validate_outer() parameter
wjssz Apr 3, 2022
db7e88b
6. validate in _validate_inner() / _validate_outer()
wjssz Apr 3, 2022
a43cb6e
7. allocate repeats_array for SRE_STATE
wjssz Apr 3, 2022
1560a0c
8. support code in sre_lib.h
wjssz Apr 3, 2022
96be025
9. add unit-tests
wjssz Apr 3, 2022
7ee3e66
a. skip -= field_number
wjssz Apr 3, 2022
e95b19f
b. improve unit-test
wjssz Apr 3, 2022
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1. add variables
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@wjssz
wjssz committed Apr 3, 2022
commit e5317fe2fd80a8fbafd8420d1a9013276b89678f
2 changes: 1 addition & 1 deletion Lib/re/_constants.py
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Expand Up @@ -13,7 +13,7 @@

# update when constants are added or removed

MAGIC = 20220318
MAGIC = 20220402

from _sre import MAXREPEAT, MAXGROUPS

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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2022-04-03-13-19-08.bpo-23689.TFSc3E.rst
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@@ -0,0 +1,2 @@
:mod:`re` module: fix memory leak when a match is terminated by a signal or
memory allocation failure. Patch by Ma Lin.
4 changes: 4 additions & 0 deletions Modules/sre.h
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Expand Up @@ -29,6 +29,8 @@ typedef struct {
Py_ssize_t groups; /* must be first! */
PyObject* groupindex; /* dict */
PyObject* indexgroup; /* tuple */
/* the number of REPEATs */
Py_ssize_t repeat_count;
/* compatibility */
PyObject* pattern; /* pattern source (or None) */
int flags; /* flags used when compiling pattern source */
Expand Down Expand Up @@ -83,6 +85,8 @@ typedef struct {
size_t data_stack_base;
/* current repeat context */
SRE_REPEAT *repeat;
/* repeat contexts array */
SRE_REPEAT *repeats_array;
} SRE_STATE;

typedef struct {
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2 changes: 1 addition & 1 deletion Modules/sre_constants.h
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Expand Up @@ -11,7 +11,7 @@
* See the _sre.c file for information on usage and redistribution.
*/

#define SRE_MAGIC 20220318
#define SRE_MAGIC 20220402
#define SRE_OP_FAILURE 0
#define SRE_OP_SUCCESS 1
#define SRE_OP_ANY 2
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