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gh-114944: Fix race between `_PyParkingLot_Park` and `_PyParkingLot_UnparkAll` when handling interrupts (#114945) 
Fix race between `_PyParkingLot_Park` and `_PyParkingLot_UnparkAll` when handling interrupts

There is a potential race when `_PyParkingLot_UnparkAll` is executing in
one thread and another thread is unblocked because of an interrupt in
`_PyParkingLot_Park`. Consider the following scenario:

1. Thread T0 is blocked[^1] in `_PyParkingLot_Park` on address `A`.
2. Thread T1 executes `_PyParkingLot_UnparkAll` on address `A`. It
   finds the `wait_entry` for `T0` and unlinks[^2] its list node.
3. Immediately after (2), T0 is woken up due to an interrupt. It
   then segfaults trying to unlink[^3] the node that was previously
   unlinked in (2).

To fix this we mark each waiter as unparking before releasing the bucket
lock. `_PyParkingLot_Park` will wait to handle the coming wakeup, and not
attempt to unlink the node, when this field is set. `_PyParkingLot_Unpark`
does this already, presumably to handle this case.
 		2024-02-05 13:48:37 -08:00
..
clinic gh-113626: Add allow_code parameter in marshal functions (GH-113648) 2024-01-16 18:05:15 +02:00
deepfreeze gh-97669: Create Tools/build/ directory (#97963) 2022-10-17 12:01:00 +02:00
frozen_modules gh-97669: Create Tools/build/ directory (#97963) 2022-10-17 12:01:00 +02:00
Python-ast.c GH-113655: Lower the C recursion limit on various platforms (GH-113944) 2024-01-16 09:32:01 +00:00
Python-tokenize.c gh-112943: Correctly compute end offsets for multiline tokens in the tokenize module (#112949) 2023-12-11 11:44:22 +00:00
README Issue #18093: Factor out the programs that embed the runtime 2014-07-25 21:52:14 +10:00
_warnings.c gh-111789: Use PyDict_GetItemRef() in Python/_warnings.c (gh-112080) 2023-11-27 18:58:43 +01:00
adaptive.md GH-98686: Get rid of "adaptive" and "quick" instructions (GH-99182) 2022-11-09 10:50:09 -08:00
asdl.c bpo-43244: Remove ast.h, asdl.h, Python-ast.h headers (GH-24933) 2021-03-23 20:47:40 +01:00
asm_trampoline.S gh-96143: Move the perf trampoline files to the Python directory (#98675) 2022-10-25 23:34:22 +01:00
assemble.c GH-111485: Generate instruction and uop metadata (GH-113287) 2023-12-20 14:27:25 +00:00
ast.c GH-113655: Lower the C recursion limit on various platforms (GH-113944) 2024-01-16 09:32:01 +00:00
ast_opt.c GH-113655: Lower the C recursion limit on various platforms (GH-113944) 2024-01-16 09:32:01 +00:00
ast_unparse.c gh-100227: Move _str_replace_inf to PyInterpreterState (gh-102333) 2023-02-28 14:16:39 -07:00
bltinmodule.c gh-111417: Remove unused code block in math.trunc() and round() (GH-111454) 2024-02-03 17:11:10 +02:00
bootstrap_hash.c gh-110014: Fix bootstrap_hash.c: remove debug code (#110161) 2023-09-30 22:21:20 +00:00
bytecodes.c GH-113710: Add a "globals to constants" pass (GH-114592) 2024-02-02 12:14:34 +00:00
ceval.c GH-113464: Add a JIT backend for tier 2 (GH-113465) 2024-01-28 18:48:48 -08:00
ceval_gil.c gh-104530: Enable native Win32 condition variables by default (GH-104531) 2024-02-02 13:50:51 +00:00
ceval_macros.h Delete unused macro (GH-114238) 2024-01-18 15:49:50 +00:00
codecs.c gh-111972: Make Unicode name C APIcapsule initialization thread-safe (#112249) 2023-11-30 11:12:49 +01:00
compile.c gh-114569: Use PyMem_* APIs for non-PyObjects in compiler (#114587) 2024-01-30 00:04:34 +01:00
condvar.h gh-104530: Enable native Win32 condition variables by default (GH-104531) 2024-02-02 13:50:51 +00:00
context.c gh-111968: Use per-thread freelists for dict in free-threading (gh-114323) 2024-02-01 20:53:53 +00:00
critical_section.c gh-111569: Implement Python critical section API (gh-111571) 2023-11-08 15:39:29 -07:00
crossinterp.c gh-76785: Avoid Pickled TracebackException for Propagated Subinterpreter Exceptions (gh-113036) 2023-12-13 00:31:30 +00:00
dtoa.c gh-111962: Make dtoa thread-safe in `--disable-gil` builds. (#112049) 2023-12-07 13:47:55 +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 bpo-32241: Add the const qualifire to declarations of umodifiable strings. (#4748) 2017-12-12 13:55:04 +02:00
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-106213: Make Emscripten trampolines work with JSPI (GH-106219) 2023-09-15 15:04:21 -07:00
errors.c gh-111375: Use `NULL` rather than `None` in the exception stack to indicate that an exception was handled (#113302) 2023-12-21 01:46:41 +00:00
executor_cases.c.h GH-113710: Add a "globals to constants" pass (GH-114592) 2024-02-02 12:14:34 +00:00
fileutils.c gh-112970: Detect and use closefrom() when available (#112969) 2023-12-12 11:25:27 +01:00
flowgraph.c gh-107901: make compiler inline basic blocks with no line number and no fallthrough (#114750) 2024-02-02 11:26:31 +00:00
formatter_unicode.c gh-92536: Remove PyUnicode_READY() calls (#105210) 2023-06-02 01:33:17 +02:00
frame.c Remove unused Py_XDECREF from _PyFrame_ClearExceptCode (GH-106158) 2024-02-01 18:26:22 +02:00
frozen.c gh-106560: Fix redundant declarations in Python/frozen.c (#112612) 2023-12-03 12:18:24 +01:00
frozenmain.c gh-110014: Include explicitly <unistd.h> header (#110155) 2023-09-30 20:06:45 +00:00
future.c gh-106320: Remove more private _PyUnicode C API functions (#106382) 2023-07-03 22:35:46 +00:00
gc.c GH-108362: Incremental GC implementation (GH-108038) 2024-02-05 18:28:51 +00:00
gc_free_threading.c GH-108362: Incremental GC implementation (GH-108038) 2024-02-05 18:28:51 +00:00
gc_gil.c gh-111968: Use per-thread freelists for dict in free-threading (gh-114323) 2024-02-01 20:53:53 +00:00
generated_cases.c.h GH-112354: `END_FOR` instruction to only pop one value. (GH-114247) 2024-01-24 15:10:17 +00:00
getargs.c gh-65210: Add const qualifiers in PyArg_VaParseTupleAndKeywords() (GH-105958) 2023-12-04 13:14:56 +02:00
getcompiler.c closes bpo-43278: remove unnecessary leading '\n' from COMPILER when build with GCC/Clang (GH-24606) 2021-02-25 20:24:21 -08:00
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 bpo-32150: Expand tabs to spaces in C files. (#4583) 2017-11-28 17:56:10 +02:00
getversion.c gh-81057: Move Globals in Core Code to _PyRuntimeState (gh-99496) 2022-11-15 09:45:11 -07:00
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-108362: Incremental GC implementation (GH-108038) 2024-02-05 18:28:51 +00:00
importdl.c gh-88402: Add new sysconfig variables on Windows (GH-110049) 2023-10-04 22:50:29 +00:00
initconfig.c gh-73965: Move PYTHON_HISTORY into the correct usage section (#113798) 2024-01-08 11:58:58 +02:00
instrumentation.c GH-113486: Do not emit spurious PY_UNWIND events for optimized calls to classes. (GH-113680) 2024-01-05 09:45:22 +00:00
intrinsics.c gh-107149: make new opcode util functions private rather than public and unstable (#112042) 2023-11-14 00:31:02 +00:00
jit.c GH-113464: Add a JIT backend for tier 2 (GH-113465) 2024-01-28 18:48:48 -08:00
legacy_tracing.c gh-103615: Use local events for opcode tracing (GH-109472) 2023-11-03 16:39:50 +00:00
lock.c gh-111964: Add _PyRWMutex a "readers-writer" lock (gh-112859) 2023-12-15 18:56:55 -07:00
marshal.c gh-113626: Add allow_code parameter in marshal functions (GH-113648) 2024-01-16 18:05:15 +02:00
modsupport.c gh-84489: Properly handle trailing spaces in Py_BuildValue() format strings (GH-21158) 2023-10-11 14:44:06 +03:00
mysnprintf.c Add a warning message about PyOS_snprintf (#95993) 2022-10-07 11:49:53 -07:00
mystrtoul.c gh-108765: Python.h no longer includes <ctype.h> (#108831) 2023-09-03 18:54:27 +02:00
object_stack.c gh-111968: Unify freelist naming schema to Eric's suggestion (gh-114581) 2024-01-27 00:25:16 +09:00
opcode_targets.h GH-111485: Generate `TARGET` table for computed goto dispatch. (GH-113319) 2023-12-20 15:09:12 +00:00
optimizer.c GH-113710: Add a "globals to constants" pass (GH-114592) 2024-02-02 12:14:34 +00:00
optimizer_analysis.c GH-113710: Add a "globals to constants" pass (GH-114592) 2024-02-02 12:14:34 +00:00
parking_lot.c gh-114944: Fix race between `_PyParkingLot_Park` and `_PyParkingLot_UnparkAll` when handling interrupts (#114945) 2024-02-05 13:48:37 -08:00
pathconfig.c gh-110079: Remove extern "C" { ...} in C code (#110080) 2023-09-29 10:56:49 +02:00
perf_trampoline.c gh-113343: Fix error check on mmap(2) (#113342) 2023-12-21 19:28:55 +00:00
preconfig.c gh-106320: Remove private pylifecycle.h functions (#106400) 2023-07-04 09:41:43 +00:00
pyarena.c bpo-43244: Remove the pyarena.h header (GH-25007) 2021-03-24 02:23:01 +01:00
pyctype.c
…
pyfpe.c bpo-46315: Add ifdef HAVE_ feature checks for WASI compatibility (GH-30507) 2022-01-13 09:46:04 +01:00
pyhash.c gh-111545: Add Py_HashPointer() function (#112096) 2023-12-06 15:09:22 +01:00
pylifecycle.c GH-113710: Add a "globals to constants" pass (GH-114592) 2024-02-02 12:14:34 +00:00
pymath.c bpo-45440: Remove pymath.c fallbacks (GH-28977) 2021-10-15 19:45:34 +02:00
pystate.c gh-104530: Enable native Win32 condition variables by default (GH-104531) 2024-02-02 13:50:51 +00:00
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-108765: Cleanup #include in Python/*.c files (#108977) 2023-09-06 15:56:08 +02:00
pythonrun.c gh-108082: Use PyErr_FormatUnraisable() (GH-111580) 2023-11-02 09:16:34 +00:00
pytime.c gh-112567: Add _PyTimeFraction C API (#112568) 2023-12-01 19:50:10 +01:00
specialize.c GH-114806. Don't specialize calls to classes with metaclasses. (GH-114870) 2024-02-01 19:39:32 +00:00
stdlib_module_names.h gh-110721: Remove unused code from suggestions.c after moving PyErr_Display to use the traceback module (#113712) 2024-01-08 15:10:45 +00:00
structmember.c gh-114388: Fix an error in GH-114391 (GH-115000) 2024-02-04 17:06:22 +00:00
suggestions.c gh-113845: Fix a compiler warning in Python/suggestions.c (GH-113949) 2024-01-11 20:31:24 +02:00
symtable.c GH-113655: Lower the C recursion limit on various platforms (GH-113944) 2024-01-16 09:32:01 +00:00
sysmodule.c gh-112529: Remove PyGC_Head from object pre-header in free-threaded build (#114564) 2024-02-01 12:29:19 -08:00
thread.c gh-84570: Add Timeouts to SendChannel.send() and RecvChannel.recv() (gh-110567) 2023-10-17 23:05:49 +00:00
thread_nt.h gh-104530: Enable native Win32 condition variables by default (GH-104531) 2024-02-02 13:50:51 +00:00
thread_pthread.h gh-81925: Implement native thread ids for kFreeBSD (#111761) 2023-11-09 21:02:30 +01:00
thread_pthread_stubs.h GH-110829: Ensure Thread.join() joins the OS thread (#110848) 2023-11-04 13:59:24 +00:00
traceback.c GH-113655: Lower the C recursion limit on various platforms (GH-113944) 2024-01-16 09:32:01 +00:00
tracemalloc.c gh-108765: Cleanup #include in Python/*.c files (#108977) 2023-09-06 15:56:08 +02:00
vm-state.md High level docs for the VM state (#111621) 2023-11-01 22:55:10 +00:00

README 

Miscellaneous source files for the main Python shared library