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mpage e99f159be4
gh-115999: Stop the world when invalidating function versions (#124997) 
Stop the world when invalidating function versions

The tier1 interpreter specializes `CALL` instructions based on the values
of certain function attributes (e.g. `__code__`, `__defaults__`). The tier1
interpreter uses function versions to verify that the attributes of a function
during execution of a specialization match those seen during specialization.
A function's version is initialized in `MAKE_FUNCTION` and is invalidated when
any of the critical function attributes are changed. The tier1 interpreter stores
the function version in the inline cache during specialization. A guard is used by
the specialized instruction to verify that the version of the function on the operand
stack matches the cached version (and therefore has all of the expected attributes).
It is assumed that once the guard passes, all attributes will remain unchanged
while executing the rest of the specialized instruction.

Stopping the world when invalidating function versions ensures that all critical
function attributes will remain unchanged after the function version guard passes
in free-threaded builds. It's important to note that this is only true if the remainder
of the specialized instruction does not enter and exit a stop-the-world point.

We will stop the world the first time any of the following function attributes
are mutated:

- defaults
- vectorcall
- kwdefaults
- closure
- code

This should happen rarely and only happens once per function, so the performance
impact on majority of code should be minimal.

Additionally, refactor the API for manipulating function versions to more clearly
match the stated semantics.
2024-10-08 10:04:35 -04:00
..
clinic gh-116750: Add clear_tool_id function to unregister events and callbacks (#124568) 2024-10-01 13:32:55 -04:00
frozen_modules
_warnings.c gh-121163: Add "all" as an valid alias for "always" in warnings.simplefilter() (#121164) 2024-06-30 19:48:00 +02:00
asdl.c
asm_trampoline.S gh-120400 ：Support Linux perf profile to see Python calls on RISC-V architecture (#120089) 2024-06-12 14:24:46 +01:00
assemble.c gh-121040: Use __attribute__((fallthrough)) (#121044) 2024-06-27 09:58:44 +00:00
ast.c gh-122313: Clean up deep recursion guarding code in the compiler (GH-122640) 2024-08-03 12:45:45 +03:00
ast_opt.c gh-123497: New limit for Python integers on 64-bit platforms (GH-123724) 2024-09-29 10:40:20 +03:00
ast_unparse.c gh-113993: Allow interned strings to be mortal, and fix related issues (GH-120520) 2024-06-21 17:19:31 +02:00
bltinmodule.c gh-123271: Make builtin zip method safe under free-threading (#123272) 2024-08-27 15:22:43 -04:00
bootstrap_hash.c gh-121199: Use _Py__has_attribute() in timemodule.c (#121203) 2024-07-01 08:49:33 +00:00
brc.c Fix typos in documentation and comments (#119763) 2024-06-04 10:22:22 +00:00
bytecodes.c GH-121459: Streamline PyObject* to PyStackRef conversions by disallowing NULL pointers. (GH-124894) 2024-10-07 18:13:04 +01:00
ceval.c GH-119866: Spill the stack around escaping calls. (GH-124392) 2024-10-07 14:56:39 +01:00
ceval_gil.c gh-87135: Hang non-main threads that attempt to acquire the GIL during finalization (GH-105805) 2024-10-02 09:17:49 -07:00
ceval_macros.h GH-119866: Spill the stack around escaping calls. (GH-124392) 2024-10-07 14:56:39 +01:00
codecs.c gh-124665: Add _PyCodec_UnregisterError and _codecs._unregister_error (#124677) 2024-09-29 02:25:23 +02:00
codegen.c gh-124285: Fix bug where bool() is called multiple times for the same part of a boolean expression (#124394) 2024-09-25 15:51:25 +01:00
compile.c gh-121404: typo fix in compile.c: MATADATA -> METADATA (#125101) 2024-10-08 12:18:28 +00:00
condvar.h gh-104530: Enable native Win32 condition variables by default (GH-104531) 2024-02-02 13:50:51 +00:00
config_common.h gh-76785: Add PyInterpreterConfig Helpers (gh-117170) 2024-04-02 20:35:52 +00:00
context.c gh-119333: get interp from tstate for PyContext watchers(#124444) 2024-09-26 05:26:23 +00:00
critical_section.c gh-119344: Make critical section API public (#119353) 2024-06-21 15:50:18 -04:00
crossinterp.c Fix typos in docs, error messages and comments (#122502) 2024-08-01 00:26:09 +00:00
crossinterp_data_lookup.h gh-76785: Improved Subinterpreters Compatibility with 3.12 (gh-115424) 2024-02-13 14:56:49 -07:00
crossinterp_exceptions.h gh-117398: Use Per-Interpreter State for the _datetime Static Types (gh-119929) 2024-06-03 17:09:18 -06:00
dtoa.c gh-121040: Use __attribute__((fallthrough)) (#121044) 2024-06-27 09:58:44 +00:00
dup2.c gh-108765: Python.h no longer includes <unistd.h> (#108783) 2023-09-02 16:50:18 +02:00
dynamic_annotations.c
dynload_hpux.c gh-88402: Add new sysconfig variables on Windows (GH-110049) 2023-10-04 22:50:29 +00:00
dynload_shlib.c gh-88402: Add new sysconfig variables on Windows (GH-110049) 2023-10-04 22:50:29 +00:00
dynload_stub.c gh-88402: Add new sysconfig variables on Windows (GH-110049) 2023-10-04 22:50:29 +00:00
dynload_win.c gh-88402: Add new sysconfig variables on Windows (GH-110049) 2023-10-04 22:50:29 +00:00
emscripten_signal.c GH-108614: Unbreak emscripten build (GH-109132) 2023-09-08 17:54:45 +01:00
emscripten_trampoline.c gh-121698 Emscripten: Use updated WebAssembly type reflection proposal (GH-121699) 2024-07-14 11:25:09 +02:00
errors.c gh-124188: Fix PyErr_ProgramTextObject() (GH-124189) 2024-09-24 11:01:37 +03:00
executor_cases.c.h GH-121459: Streamline PyObject* to PyStackRef conversions by disallowing NULL pointers. (GH-124894) 2024-10-07 18:13:04 +01:00
fileutils.c gh-117657: Fix TSan reported data race on ioctl_works (#120175) 2024-06-17 13:23:40 -04:00
flowgraph.c gh-124871: fix 'visited' tracking in compiler's reachability analysis (#124952) 2024-10-04 17:37:38 +01:00
formatter_unicode.c gh-121040: Use __attribute__((fallthrough)) (#121044) 2024-06-27 09:58:44 +00:00
frame.c gh-123923: Defer refcounting for f_funcobj in _PyInterpreterFrame (#124026) 2024-09-24 20:08:18 +00:00
frozen.c gh-108716: Cleanup remaining deepfreeze infrastructure (#116919) 2024-03-18 11:13:11 -07:00
frozenmain.c gh-105716: Fix _PyInterpreterState_IsRunningMain() For Embedders (gh-117140) 2024-03-21 18:20:20 -06:00
future.c Fixes loop variables to be the same types as their limit (GH-120958) 2024-06-24 17:11:47 +01:00
gc.c gh-116510: Fix crash during sub-interpreter shutdown (gh-124645) 2024-09-26 19:33:07 -07:00
gc_free_threading.c gh-124218: Refactor per-thread reference counting (#124844) 2024-10-01 17:05:42 +00:00
gc_gil.c gh-100240: Use a consistent implementation for freelists (#121934) 2024-07-22 12:08:27 -04:00
generated_cases.c.h GH-121459: Streamline PyObject* to PyStackRef conversions by disallowing NULL pointers. (GH-124894) 2024-10-07 18:13:04 +01:00
getargs.c gh-118814: Fix the TypeVar constructor when name is passed by keyword (GH-122664) 2024-08-07 23:30:10 +03:00
getcompiler.c
getcopyright.c Update copyright years to 2024. (GH-113608) 2024-01-16 21:54:05 +01:00
getopt.c gh-110079: Remove extern "C" { ...} in C code (#110080) 2023-09-29 10:56:49 +02:00
getplatform.c
getversion.c gh-119132: Update sys.version to identify free-threaded or not. (gh-119134) 2024-05-18 19:44:40 +00:00
hamt.c gh-106320: Remove private PyLong C API functions (#108429) 2023-08-24 18:53:50 +02:00
hashtable.c gh-111545: Add Py_HashPointer() function (#112096) 2023-12-06 15:09:22 +01:00
import.c gh-123880: Allow recursive import of single-phase-init modules (GH-123950) 2024-09-20 10:27:34 +02:00
importdl.c gh-122907: Fix Builds Without HAVE_DYNAMIC_LOADING Set (gh-122952) 2024-08-13 14:44:57 -06:00
initconfig.c gh-107954: Fix configuration type for the perf profiler (#124636) 2024-09-28 01:50:16 +02:00
instruction_sequence.c gh-117680: Fix msvc warning in instruction_sequence.c (#118326) 2024-04-26 17:20:30 +01:00
instrumentation.c GH-116968: Remove branch from advance_backoff_counter (GH-124469) 2024-10-07 11:46:33 +01:00
interpconfig.c gh-76785: Fix a Refleak in _interpreters.new_config() (gh-117491) 2024-04-03 01:10:26 +00:00
intrinsics.c gh-74929: Implement PEP 667 (GH-115153) 2024-05-04 12:12:10 +01:00
jit.c GH-119726: Deduplicate AArch64 trampolines within a trace (GH-123872) 2024-10-02 12:07:20 -07:00
legacy_tracing.c gh-123923: Defer refcounting for f_executable in _PyInterpreterFrame (#123924) 2024-09-12 12:37:06 -04:00
lock.c gh-121368: Fix seq lock memory ordering in _PyType_Lookup (#121388) 2024-07-08 14:52:07 -04:00
marshal.c gh-121905: Consistently use "floating-point" instead of "floating point" (GH-121907) 2024-07-19 08:06:02 +00:00
modsupport.c gh-121040: Use __attribute__((fallthrough)) (#121044) 2024-06-27 09:58:44 +00:00
mysnprintf.c
mystrtoul.c gh-108765: Python.h no longer includes <ctype.h> (#108831) 2023-09-03 18:54:27 +02:00
object_stack.c gh-100240: Use a consistent implementation for freelists (#121934) 2024-07-22 12:08:27 -04:00
opcode_targets.h GH-119866: Spill the stack around escaping calls. (GH-124392) 2024-10-07 14:56:39 +01:00
optimizer.c GH-118093: Don't lose confidence when tracing through 100% biased branches (GH-124813) 2024-10-02 19:24:37 +00:00
optimizer_analysis.c gh-120619: Optimize through _Py_FRAME_GENERAL (GH-124518) 2024-10-03 01:10:51 +08:00
optimizer_bytecodes.c GH-119866: Spill the stack around escaping calls. (GH-124392) 2024-10-07 14:56:39 +01:00
optimizer_cases.c.h GH-119866: Spill the stack around escaping calls. (GH-124392) 2024-10-07 14:56:39 +01:00
optimizer_symbols.c gh-120642: Move private PyCode APIs to the internal C API (#120643) 2024-06-26 13:54:03 +02:00
parking_lot.c gh-112804: Clamping timeout value for _PySemaphore_PlatformWait (gh-124914) 2024-10-05 11:27:32 +09:00
pathconfig.c gh-117987: Restore several functions removed in Python 3.13 alpha 1 (GH-117993) 2024-04-18 15:20:38 +02:00
perf_jit_trampoline.c GH-118844: Fix build failures when combining --disable-gil with --enable-experimental-jit (GH-118935) 2024-05-11 16:19:31 -07:00
perf_trampoline.c gh-118518: Allow perf to work without frame pointers (#112254) 2024-05-05 03:07:29 +02:00
preconfig.c gh-106320: Remove private pylifecycle.h functions (#106400) 2023-07-04 09:41:43 +00:00
pyarena.c gh-119219: Remove two obsolete TODOs. (#119223) 2024-05-20 16:54:16 +00:00
pyctype.c
pyfpe.c
pyhash.c gh-122854: Add Py_HashBuffer() function (#122855) 2024-08-30 15:42:27 +00:00
pylifecycle.c gh-87135: Hang non-main threads that attempt to acquire the GIL during finalization (GH-105805) 2024-10-02 09:17:49 -07:00
pymath.c
pystate.c gh-116750: Add clear_tool_id function to unregister events and callbacks (#124568) 2024-10-01 13:32:55 -04:00
pystrcmp.c gh-108767: Replace ctype.h functions with pyctype.h functions (#108772) 2023-09-01 18:36:53 +02:00
pystrhex.c gh-108765: pystrhex: Replace stdlib.h abs() with Py_ABS() (#108830) 2023-09-02 23:15:54 +02:00
pystrtod.c gh-121040: Use __attribute__((fallthrough)) (#121044) 2024-06-27 09:58:44 +00:00
Python-ast.c gh-125010: Fix use-after-free in AST repr() (#125015) 2024-10-06 12:46:03 -07:00
Python-tokenize.c gh-120317: Lock around global state in the tokenize module (#120318) 2024-07-16 11:35:57 +02:00
pythonrun.c gh-121804: always show error location for SyntaxError's in basic repl (#123202) 2024-09-03 12:37:29 +00:00
pytime.c gh-111513: Improve datetime.fromtimestamp's error message (#124249) 2024-09-20 14:42:43 +02:00
qsbr.c Fix typos in comments (#120481) 2024-06-19 23:16:14 -04:00
README
specialize.c gh-115999: Stop the world when invalidating function versions (#124997) 2024-10-08 10:04:35 -04:00
stdlib_module_names.h gh-123892: Add "_wmi" to sys.stdlib_module_names (#123893) 2024-09-10 09:54:17 +00:00
structmember.c gh-117657: Fix __slots__ thread safety in free-threaded build (#119368) 2024-06-17 18:44:54 +00:00
suggestions.c Fixes loop variables to be the same types as their limit (GH-120958) 2024-06-24 17:11:47 +01:00
symtable.c gh-122985: add SYMBOL_TO_SCOPE macro in symtable (#122986) 2024-08-14 06:17:04 +01:00
sysmodule.c gh-123923: Defer refcounting for f_funcobj in _PyInterpreterFrame (#124026) 2024-09-24 20:08:18 +00:00
thread.c gh-110850: Cleanup PyTime API: PyTime_t are nanoseconds (#115753) 2024-02-21 11:46:00 +01:00
thread_nt.h gh-87135: Hang non-main threads that attempt to acquire the GIL during finalization (GH-105805) 2024-10-02 09:17:49 -07:00
thread_pthread.h gh-87135: Hang non-main threads that attempt to acquire the GIL during finalization (GH-105805) 2024-10-02 09:17:49 -07:00
thread_pthread_stubs.h GH-110829: Ensure Thread.join() joins the OS thread (#110848) 2023-11-04 13:59:24 +00:00
tier2_engine.md Docs: fix spelling of the word 'transferring' (#116641) 2024-03-13 23:53:32 +01:00
traceback.c gh-117764: Fix and add signatures for many builtins (GH-117769) 2024-04-12 13:56:41 +03:00
tracemalloc.c gh-123923: Defer refcounting for f_executable in _PyInterpreterFrame (#123924) 2024-09-12 12:37:06 -04:00
uniqueid.c gh-124218: Refactor per-thread reference counting (#124844) 2024-10-01 17:05:42 +00:00
vm-state.md Fix typos in documentation and comments (#119763) 2024-06-04 10:22:22 +00:00

README 

Miscellaneous source files for the main Python shared library