delta/cpython-git.git/Modules/_tracemalloc.c, branch berkerpeksag-update-codeowners

bpo-29564:_PyMem_DumpTraceback() suggests enabling tracemalloc (GH-10510)

2018-11-13T14:14:58+00:00

If tracemalloc is not tracing Python memory allocations,
_PyMem_DumpTraceback() now suggests to enable tracemalloc
to get the traceback where the memory block has been allocated.

bpo-9263: Dump Python object on GC assertion failure (GH-10062)

2018-10-25T15:31:10+00:00

Changes:

* Add _PyObject_AssertFailed() function.
* Add _PyObject_ASSERT() and _PyObject_ASSERT_WITH_MSG() macros.
* gc_decref(): replace assert() with _PyObject_ASSERT_WITH_MSG() to
  dump the faulty object if the assertion fails.

_PyObject_AssertFailed() calls:

* _PyMem_DumpTraceback(): try to log the traceback where the object
  memory has been allocated if tracemalloc is enabled.
* _PyObject_Dump(): log repr(obj).
* Py_FatalError(): log the current Python traceback.

_PyObject_AssertFailed() uses _PyObject_IsFreed() heuristic to check
if the object memory has been freed by a debug hook on Python memory
allocators.

Initial patch written by David Malcolm.

Co-Authored-By: David Malcolm

bpo-35053: Enhance tracemalloc to trace free lists (GH-10063)

2018-10-25T11:31:16+00:00

tracemalloc now tries to update the traceback when an object is
reused from a "free list" (optimization for faster object creation,
used by the builtin list type for example).

Changes:

* Add _PyTraceMalloc_NewReference() function which tries to update
  the Python traceback of a Python object.
* _Py_NewReference() now calls _PyTraceMalloc_NewReference().
* Add an unit test.

bpo-32030: Enhance Py_Main() (#4412)

2017-11-16T02:11:45+00:00

Parse more env vars in Py_Main():

* Add more options to _PyCoreConfig:

  * faulthandler
  * tracemalloc
  * importtime

* Move code to parse environment variables from _Py_InitializeCore()
  to Py_Main(). This change fixes a regression from Python 3.6:
  PYTHONUNBUFFERED is now read before calling pymain_init_stdio().
* _PyFaulthandler_Init() and _PyTraceMalloc_Init() now take an
  argument to decide if the module has to be enabled at startup.
* tracemalloc_start() is now responsible to check the maximum number
  of frames.

Other changes:

* Cleanup Py_Main():

  * Rename some pymain_xxx() subfunctions
  * Add pymain_run_python() subfunction

* Cleanup Py_NewInterpreter()
* _PyInterpreterState_Enable() now reports failure
* init_hash_secret() now considers pyurandom() failure as an "user
  error": don't fail with abort().
* pymain_optlist_append() and pymain_strdup() now sets err on memory
  allocation failure.

bpo-25658: Implement PEP 539 for Thread Specific Storage (TSS) API (GH-1362)

2017-10-06T10:41:34+00:00

See PEP 539 for details.

Highlights of changes:

- Add Thread Specific Storage (TSS) API
- Document the Thread Local Storage (TLS) API as deprecated
- Update code that used TLS API to use TSS API

bpo-31338 (#3374)

2017-09-15T01:13:16+00:00

* Add Py_UNREACHABLE() as an alias to abort().
* Use Py_UNREACHABLE() instead of assert(0)
* Convert more unreachable code to use Py_UNREACHABLE()
* Document Py_UNREACHABLE() and a few other macros.

bpo-31370: Remove support for threads-less builds (#3385)

2017-09-07T16:56:24+00:00

* Remove Setup.config
* Always define WITH_THREAD for compatibility.

bpo-31018: Switch to #pragma pack from __declspec(align) (#2848)

2017-07-25T08:47:43+00:00

bpo-30961: Fix decrementing a borrowed reference in tracemalloc. (#2747)

2017-07-18T16:33:29+00:00

bpo-30054: Expose tracemalloc C API (#1236)

2017-06-20T15:46:36+00:00

* Make PyTraceMalloc_Track() and PyTraceMalloc_Untrack() functions
  public (remove the "_" prefix)
* Remove the _PyTraceMalloc_domain_t type: use directly unsigned
  int.
* Document methods

Note: methods are already tested in test_tracemalloc.