Commit Graph

465 Commits

Author SHA1 Message Date
Mark Shannon 15d4c9fabc
GH-108716: Turn off deep-freezing of code objects. (GH-108722) 2023-09-08 10:34:40 +01:00
Victor Stinner b298b395e8
gh-108765: Cleanup #include in Python/*.c files (#108977)
Mention one symbol imported by each #include.
2023-09-06 15:56:08 +02:00
Victor Stinner b936cf4fe0
gh-108634: PyInterpreterState_New() no longer calls Py_FatalError() (#108748)
pycore_create_interpreter() now returns a status, rather than
calling Py_FatalError().

* PyInterpreterState_New() now calls Py_ExitStatusException() instead
  of calling Py_FatalError() directly.
* Replace Py_FatalError() with PyStatus in init_interpreter() and
  _PyObject_InitState().
* _PyErr_SetFromPyStatus() now raises RuntimeError, instead of
  ValueError. It can now call PyErr_NoMemory(), raise MemoryError,
  if it detects _PyStatus_NO_MEMORY() error message.
2023-09-01 12:43:30 +02:00
Victor Stinner 13a00078b8
gh-108634: Py_TRACE_REFS uses a hash table (#108663)
Python built with "configure --with-trace-refs" (tracing references)
is now ABI compatible with Python release build and debug build.
Moreover, it now also supports the Limited API.

Change Py_TRACE_REFS build:

* Remove _PyObject_EXTRA_INIT macro.
* The PyObject structure no longer has two extra members (_ob_prev
  and _ob_next).
* Use a hash table (_Py_hashtable_t) to trace references (all
  objects): PyInterpreterState.object_state.refchain.
* Py_TRACE_REFS build is now ABI compatible with release build and
  debug build.
* Limited C API extensions can now be built with Py_TRACE_REFS:
  xxlimited, xxlimited_35, _testclinic_limited.
* No longer rename PyModule_Create2() and PyModule_FromDefAndSpec2()
  functions to PyModule_Create2TraceRefs() and
  PyModule_FromDefAndSpec2TraceRefs().
* _Py_PrintReferenceAddresses() is now called before
  finalize_interp_delete() which deletes the refchain hash table.
* test_tracemalloc find_trace() now also filters by size to ignore
  the memory allocated by _PyRefchain_Trace().

Test changes for Py_TRACE_REFS:

* Add test.support.Py_TRACE_REFS constant.
* Add test_sys.test_getobjects() to test sys.getobjects() function.
* test_exceptions skips test_recursion_normalizing_with_no_memory()
  and test_memory_error_in_PyErr_PrintEx() if Python is built with
  Py_TRACE_REFS.
* test_repl skips test_no_memory().
* test_capi skisp test_set_nomemory().
2023-08-31 18:33:34 +02:00
Victor Stinner 6726626646
gh-108314: Add PyDict_ContainsString() function (#108323) 2023-08-24 15:59:12 +02:00
Victor Stinner 4dc9f48930
gh-108308: Replace _PyDict_GetItemStringWithError() (#108372)
Replace _PyDict_GetItemStringWithError() calls with
PyDict_GetItemStringRef() which returns a strong reference to the
item.

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
2023-08-23 22:59:00 +02:00
Victor Stinner f5559f38d9
gh-108308: Replace PyDict_GetItem() with PyDict_GetItemRef() (#108309)
Replace PyDict_GetItem() calls with PyDict_GetItemRef()
or PyDict_GetItemWithError() to handle errors.

* Replace PyLong_AS_LONG() with _PyLong_AsInt()
  and check for errors.
* Check for PyDict_Contains() error.
* pycore_init_builtins() checks for _PyType_Lookup() failure.
2023-08-23 17:40:26 +02:00
Victor Stinner 6541fe4ad7
Ignore _Py_write_noraise() result: cast to (void) (#108291)
Code using _Py_write_noraise() usually cannot report. Ignore errors
is the least surprising behavior for users.
2023-08-22 14:28:20 +00:00
Victor Stinner 3ff5ef2ad3
gh-108014: Add Py_IsFinalizing() function (#108032)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
2023-08-18 12:34:41 +02:00
Mark Shannon 006e44f950
GH-108035: Remove the `_PyCFrame` struct as it is no longer needed for performance. (GH-108036) 2023-08-17 11:16:03 +01:00
Eric Snow 430632d6f7
gh-107630: Initialize Each Interpreter's refchain Properly (gh-107733)
This finishes fixing the crashes in Py_TRACE_REFS builds.  We missed this part in gh-107567.
2023-08-07 13:14:56 -06:00
Eric Snow 58ef741867
gh-107080: Fix Py_TRACE_REFS Crashes Under Isolated Subinterpreters (gh-107567)
The linked list of objects was a global variable, which broke isolation between interpreters, causing crashes. To solve this, we've moved the linked list to each interpreter.
2023-08-03 19:51:08 +00:00
Victor Stinner 5e4af2a3e9
gh-106320: Move private _PySet API to the internal API (#107041)
* Add pycore_setobject.h header file.
* Move the following API to the internal C API:

  * _PySet_Dummy
  * _PySet_NextEntry()
  * _PySet_Update()
2023-07-22 17:04:34 +02:00
Brandt Bucher 214a25dd81
GH-104584: Miscellaneous fixes for -Xuops (GH-106908) 2023-07-20 16:35:39 +00:00
Victor Stinner 0b51463862
Remove private _PyCodec_Lookup() function (#106269)
Remove the following private functions of the C API:

* _PyCodecInfo_GetIncrementalDecoder()
* _PyCodecInfo_GetIncrementalEncoder()
* _PyCodec_DecodeText()
* _PyCodec_EncodeText()
* _PyCodec_Forget()
* _PyCodec_Lookup()
* _PyCodec_LookupTextEncoding()

Move these functions to a new pycore_codecs.h internal header file.

These functions are no longer exported.
2023-06-30 09:34:01 +00:00
Victor Stinner 84caa3324a
gh-106084: Remove _PyObject_CallMethod() function (#106159)
Remove the following private functions from the public C API:

* _Py_CheckFunctionResult()
* _PyObject_CallMethod()
* _PyObject_CallMethodId()
* _PyObject_CallMethodIdNoArgs()
* _PyObject_CallMethodIdObjArgs()
* _PyObject_CallMethodIdOneArg()
* _PyObject_MakeTpCall()
* _PyObject_VectorcallMethodId()
* _PyStack_AsDict()

Move these functions to the internal C API (pycore_call.h).

No longer export the following functions:

* _PyObject_Call()
* _PyObject_CallMethod()
* _PyObject_CallMethodId()
* _PyObject_CallMethodIdObjArgs()
* _PyObject_Call_Prepend()
* _PyObject_FastCallDictTstate()
* _PyStack_AsDict()

The following functions are still exported for stdlib shared
extensions:

* _Py_CheckFunctionResult()
* _PyObject_MakeTpCall()

Mark the following internal functions as extern:

* _PyStack_UnpackDict()
* _PyStack_UnpackDict_Free()
* _PyStack_UnpackDict_FreeNoDecRef()
2023-06-28 01:34:37 +02:00
Guido van Rossum 51fc725117
gh-104584: Baby steps towards generating and executing traces (#105924)
Added a new, experimental, tracing optimizer and interpreter (a.k.a. "tier 2"). This currently pessimizes, so don't use yet -- this is infrastructure so we can experiment with optimizing passes. To enable it, pass ``-Xuops`` or set ``PYTHONUOPS=1``. To get debug output, set ``PYTHONUOPSDEBUG=N`` where ``N`` is a debug level (0-4, where 0 is no debug output and 4 is excessively verbose).

All of this code is likely to change dramatically before the 3.13 feature freeze. But this is a first step.
2023-06-26 19:02:57 -07:00
Victor Stinner 4328dc6465
gh-105927: finalize_modules_clear_weaklist() uses _PyWeakref_GET_REF() (#105971)
finalize_modules_clear_weaklist() now holds a strong reference to the
module longer than before: replace PyWeakref_GET_OBJECT() with
_PyWeakref_GET_REF().
2023-06-21 21:50:20 +02:00
Mark Shannon 7199584ac8
GH-100987: Allow objects other than code objects as the "executable" of an internal frame. (GH-105727)
* Add table describing possible executable classes for out-of-process debuggers.

* Remove shim code object creation code as it is no longer needed.

* Make lltrace a bit more robust w.r.t. non-standard frames.
2023-06-14 13:46:37 +01:00
Eric Snow 757b402ea1
gh-104812: Run Pending Calls in any Thread (gh-104813)
For a while now, pending calls only run in the main thread (in the main interpreter).  This PR changes things to allow any thread run a pending call, unless the pending call was explicitly added for the main thread to run.
2023-06-13 15:02:19 -06:00
Eric Snow b97e14a806
gh-105603: Change the PyInterpreterConfig.own gil Field (gh-105620)
We are changing it to be more flexible that a strict bool can be for possible future expanded used cases.
2023-06-13 11:08:32 -06:00
Eric Snow 7799c8e678
gh-100227: Lock Around Use of the Global "atexit" State (gh-105514)
The risk of a race with this state is relatively low, but we play it safe anyway.
2023-06-08 18:08:28 +00:00
Eric Snow 3698fda06e
gh-104341: Call _PyEval_ReleaseLock() with NULL When Finalizing the Current Thread (gh-105109)
This avoids the problematic race in drop_gil() by skipping the FORCE_SWITCHING code there for finalizing threads.

(The idea for this approach came out of discussions with @markshannon.)
2023-06-01 16:24:10 -06:00
Victor Stinner 424049cc11
gh-105145: Remove old functions to config Python init (#105154)
Remove the following old functions to configure the Python
initialization, deprecated in Python 3.11:

* PySys_AddWarnOptionUnicode()
* PySys_AddWarnOption()
* PySys_AddXOption()
* PySys_HasWarnOptions()
* PySys_SetArgvEx()
* PySys_SetArgv()
* PySys_SetPath()
* Py_SetPath()
* Py_SetProgramName()
* Py_SetPythonHome()
* Py_SetStandardStreamEncoding()
* _Py_SetProgramFullPath()

Most of these functions are kept in the stable ABI, except:

* Py_SetStandardStreamEncoding()
* _Py_SetProgramFullPath()

Update Doc/extending/embedding.rst and Doc/extending/extending.rst to
use the new PyConfig API.

_testembed.c:

* check_stdio_details() now sets stdio_encoding and stdio_errors
  of PyConfig.
* Add definitions of functions removed from the API but kept in the
  stable ABI.
* test_init_from_config() and test_init_read_set() now use
  PyConfig_SetString() instead of PyConfig_SetBytesString().

Remove _Py_ClearStandardStreamEncoding() internal function.
2023-06-01 09:14:02 +02:00
gsallam be0c106789
gh-103295: expose API for writing perf map files (#103546)
Co-authored-by: Aniket Panse <aniketpanse@fb.com>
Co-authored-by: Gregory P. Smith <greg@krypto.org>
Co-authored-by: Carl Meyer <carl@oddbird.net>
2023-05-21 11:12:24 +01:00
Mark Shannon f7df173949
GH-101520: Move tracemalloc functionality into core, leaving interface in Modules. (#104508) 2023-05-17 14:17:16 +01:00
Jelle Zijlstra 24d8b88420
gh-103763: Implement PEP 695 (#103764)
This implements PEP 695, Type Parameter Syntax. It adds support for:

- Generic functions (def func[T](): ...)
- Generic classes (class X[T](): ...)
- Type aliases (type X = ...)
- New scoping when the new syntax is used within a class body
- Compiler and interpreter changes to support the new syntax and scoping rules 

Co-authored-by: Marc Mueller <30130371+cdce8p@users.noreply.github.com>
Co-authored-by: Eric Traut <eric@traut.com>
Co-authored-by: Larry Hastings <larry@hastings.org>
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
2023-05-15 20:36:23 -07:00
Eric Snow 26baa747c2
gh-104341: Adjust tstate_must_exit() to Respect Interpreter Finalization (gh-104437)
With the move to a per-interpreter GIL, this check slipped through the cracks.
2023-05-15 13:59:26 -06:00
Erlend E. Aasland 186bf39f5c
gh-101819: Isolate `_io` (#101948)
Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
Co-authored-by: Victor Stinner <vstinner@python.org>
2023-05-15 09:26:27 +00:00
Eric Snow 92d8bfffbf
gh-99113: Make Sure the GIL is Acquired at the Right Places (gh-104208)
This is a pre-requisite for a per-interpreter GIL.  Without it this change isn't strictly necessary.  However, there is no real downside otherwise.
2023-05-06 15:59:30 -06:00
Eric Snow f3e7eb48f8
gh-99113: Add PyInterpreterConfig.own_gil (gh-104204)
We also add PyInterpreterState.ceval.own_gil to record if the interpreter actually has its own GIL.

Note that for now we don't actually respect own_gil; all interpreters still share the one GIL.  However, PyInterpreterState.ceval.own_gil does reflect PyInterpreterConfig.own_gil.  That lie is a temporary one that we will fix when the GIL really becomes per-interpreter.
2023-05-05 15:59:20 -06:00
Victor Stinner 45398ad512
gh-103323: Remove PyRuntimeState_GetThreadState() (#104171)
This function no longer makes sense, since its runtime parameter is
no longer used. Use directly _PyThreadState_GET() and
_PyInterpreterState_GET() instead.
2023-05-04 16:21:01 +02:00
Eric Snow 292076a9aa
gh-104109: Expose Py_NewInterpreterFromConfig() in the Public C-API (gh-104110)
We also expose PyInterpreterConfig. This is part of the PEP 684 (per-interpreter GIL) implementation.  We will add docs as soon as we can.

FYI, I'm adding the new config field for per-interpreter GIL in gh-99114.
2023-05-02 21:40:00 -06:00
Eric Snow fdd878650d
gh-94673: Properly Initialize and Finalize Static Builtin Types for Each Interpreter (gh-104072)
Until now, we haven't been initializing nor finalizing the per-interpreter state properly.
2023-05-01 19:36:00 -06:00
Barry Warsaw e1f14643dc
gh-98040: Remove just the `imp` module (#98573) 2023-04-28 16:17:58 -07:00
Eric Snow d2e2e53f73
gh-94673: Ensure Builtin Static Types are Readied Properly (gh-103940)
There were cases where we do unnecessary work for builtin static types. This also simplifies some work necessary for a per-interpreter GIL.
2023-04-27 16:19:43 -06:00
Eric Snow df3173d28e
gh-101659: Isolate "obmalloc" State to Each Interpreter (gh-101660)
This is strictly about moving the "obmalloc" runtime state from
`_PyRuntimeState` to `PyInterpreterState`.  Doing so improves isolation
between interpreters, specifically most of the memory (incl. objects)
allocated for each interpreter's use.  This is important for a
per-interpreter GIL, but such isolation is valuable even without it.

FWIW, a per-interpreter obmalloc is the proverbial
canary-in-the-coalmine when it comes to the isolation of objects between
interpreters.  Any object that leaks (unintentionally) to another
interpreter is highly likely to cause a crash (on debug builds at
least).  That's a useful thing to know, relative to interpreter
isolation.
2023-04-24 17:23:57 -06:00
Eddie Elizondo ea2c001650
gh-84436: Implement Immortal Objects (gh-19474)
This is the implementation of PEP683

Motivation:

The PR introduces the ability to immortalize instances in CPython which bypasses reference counting. Tagging objects as immortal allows up to skip certain operations when we know that the object will be around for the entire execution of the runtime.

Note that this by itself will bring a performance regression to the runtime due to the extra reference count checks. However, this brings the ability of having truly immutable objects that are useful in other contexts such as immutable data sharing between sub-interpreters.
2023-04-22 13:39:37 -06:00
Eric Snow 03089fdccc
gh-101659: Add _Py_AtExit() (gh-103298)
The function is like Py_AtExit() but for a single interpreter.  This is a companion to the atexit module's register() function, taking a C callback instead of a Python one.

We also update the _xxinterpchannels module to use _Py_AtExit(), which is the motivating case.  (This is inspired by pain points felt while working on gh-101660.)
2023-04-05 18:42:02 -06:00
Eric Snow 89e67ada69
gh-100227: Revert gh-102925 "gh-100227: Make the Global Interned Dict Safe for Isolated Interpreters" (gh-103063)
This reverts commit 87be8d9.

This approach to keeping the interned strings safe is turning out to be too complex for my taste (due to obmalloc isolation). For now I'm going with the simpler solution, making the dict per-interpreter. We can revisit that later if we want a sharing solution.
2023-03-27 16:53:05 -06:00
Eric Snow 87be8d9522
gh-100227: Make the Global Interned Dict Safe for Isolated Interpreters (gh-102925)
This is effectively two changes.  The first (the bulk of the change) is where we add _Py_AddToGlobalDict() (and _PyRuntime.cached_objects.main_tstate, etc.).  The second (much smaller) change is where we update PyUnicode_InternInPlace() to use _Py_AddToGlobalDict() instead of calling PyDict_SetDefault() directly.

Basically, _Py_AddToGlobalDict() is a wrapper around PyDict_SetDefault() that should be used whenever we need to add a value to a runtime-global dict object (in the few cases where we are leaving the container global rather than moving it to PyInterpreterState, e.g. the interned strings dict).  _Py_AddToGlobalDict() does all the necessary work to make sure the target global dict is shared safely between isolated interpreters.  This is especially important as we move the obmalloc state to each interpreter (gh-101660), as well as, potentially, the GIL (PEP 684).

https://github.com/python/cpython/issues/100227
2023-03-22 18:30:04 -06:00
Eric Snow e6ecd3e6b4
gh-94673: Isolate the _io module to Each Interpreter (gh-102663)
Aside from sys and builtins, _io is the only core builtin module that hasn't been ported to multi-phase init.  We may do so later (e.g. gh-101948), but in the meantime we must at least take care of the module's static types properly.  (This came up while working on gh-101660.)

https://github.com/python/cpython/issues/94673
2023-03-21 14:01:38 -06:00
Eric Snow d1b883b52a
gh-98608: Fix Failure-handling in new_interpreter() (gh-102658)
The error-handling code in new_interpreter() has been broken for a while.  We hadn't noticed because those code mostly doesn't fail.  (I noticed while working on gh-101660.)  The problem is that we try to clear/delete the newly-created thread/interpreter using itself, which just failed.  The solution is to switch back to the calling thread state first.

https://github.com/python/cpython/issues/98608
2023-03-21 12:47:55 -06:00
Eric Snow 743687434c
gh-102304: Move the Total Refcount to PyInterpreterState (gh-102545)
Moving it valuable with a per-interpreter GIL.  However, it is also useful without one, since it allows us to identify refleaks within a single interpreter or where references are escaping an interpreter.  This becomes more important as we move the obmalloc state to PyInterpreterState.

https://github.com/python/cpython/issues/102304
2023-03-21 11:46:09 -06:00
Eric Snow 3bb475662b
gh-98608: Stop Treating All Errors from _Py_NewInterpreterFromConfig() as Fatal (gh-102657)
Prior to this change, errors in _Py_NewInterpreterFromConfig() were always fatal.  Instead, callers should be able to handle such errors and keep going.  That's what this change supports.  (This was an oversight in the original implementation of _Py_NewInterpreterFromConfig().)  Note that the existing [fatal] behavior of the public Py_NewInterpreter() is preserved.

https://github.com/python/cpython/issues/98608
2023-03-21 10:49:12 -06:00
Eric Snow ad77d16a62
gh-102304: Move _Py_RefTotal to _PyRuntimeState (gh-102543)
The essentially eliminates the global variable, with the associated benefits. This is also a precursor to isolating this bit of state to PyInterpreterState.

Folks that currently read _Py_RefTotal directly would have to start using _Py_GetGlobalRefTotal() instead.

https://github.com/python/cpython/issues/102304
2023-03-20 10:03:04 -06:00
Irit Katriel ccb5af7bfe
gh-102755: fix refleak (#102826) 2023-03-19 15:18:24 +00:00
Irit Katriel e1e9bab006
gh-102778: Add sys.last_exc, deprecate sys.last_type, sys.last_value,sys.last_traceback (#102779) 2023-03-18 11:47:11 +00:00
Irit Katriel 3f9285a8c5
gh-102755: Add PyErr_DisplayException(exc) (#102756) 2023-03-16 22:18:04 +00:00
Max Bachmann c6858d1e7f
gh-102255: Improve build support for Windows API partitions (GH-102256)
Add `MS_WINDOWS_DESKTOP`, `MS_WINDOWS_APPS`, `MS_WINDOWS_SYSTEM` and `MS_WINDOWS_GAMES` preprocessor definitions to allow switching off functionality missing from particular API partitions ("partitions" are used in Windows to identify overlapping subsets of APIs).
CPython only officially supports `MS_WINDOWS_DESKTOP` and `MS_WINDOWS_SYSTEM` (APPS is included by normal desktop builds, but APPS without DESKTOP is not covered). Other configurations are a convenience for people building their own runtimes.
`MS_WINDOWS_GAMES` is for the Xbox subset of the Windows API, which is also available on client OS, but is restricted compared to `MS_WINDOWS_DESKTOP`. These restrictions may change over time, as they relate to the build headers rather than the OS support, and so we assume that Xbox builds will use the latest available version of the GDK.
2023-03-09 21:09:12 +00:00