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Nazım Can Altınova 494f2e3c92
gh-150723: Fix perf jitdump files on macOS (#150728) 
The perf jitdump format defines the thread id field of the JR_CODE_LOAD
record as a 32-bit value, but on macOS it was declared as a uint64_t
(since pthread_threadid_np() returns a uint64_t). Those extra 8 bytes
plus alignment padding shifted every following field, so parsers reading
the file by the spec misread code_size as the code address and failed to
resolve any Python frames.

Declare thread_id as uint32_t on all platforms and truncate the macOS
thread id when writing the record. The value is only informational.
Symbols are resolved by address, and not thread ids so truncation is
safe here.

* Use mach_absolute_time for macOS jitdump timestamps

On macOS the jitdump file is consumed by profilers such as samply, which
timestamp their samples using mach_absolute_time(). The jitdump events were
stamped with clock_gettime(CLOCK_MONOTONIC), a different clock domain that
keeps advancing while the system is asleep, so the JIT code mappings could be
off by days relative to the samples and no Python frame would resolve. Stamp
jitdump events with mach_absolute_time() on macOS so they share the sampler's
clock domain. Linux continues to use CLOCK_MONOTONIC to stay aligned with perf.

Exercise the -Xperf_jit (jitdump) backend through samply and assert that
Python frames resolve, exercising the binary jitdump path end to end.
Skipped when samply is not installed.
2026-06-03 01:15:34 +01:00
..
clinic gh-150285: Fix too long docstrings in Argument Clinic code (GH-150338) 2026-05-24 16:16:12 +03:00
frozen_modules
_contextvars.c gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770) 2026-03-24 17:47:55 +00:00
_warnings.c gh-143231: Add the module attribute to warnings.WarningMessage (GH-149298) 2026-05-03 09:35:47 +00:00
asdl.c
asm_trampoline_aarch64.S gh-149800: Split perf trampoline assembly into per-architecture files (#149894) 2026-05-23 08:03:52 -04:00
asm_trampoline_riscv64.S gh-149800: Split perf trampoline assembly into per-architecture files (#149894) 2026-05-23 08:03:52 -04:00
asm_trampoline_x86_64.S gh-149800: Split perf trampoline assembly into per-architecture files (#149894) 2026-05-23 08:03:52 -04:00
assemble.c gh-146442: Fix various bugs in compiler pipeline (#146443) 2026-03-30 22:04:04 +02:00
ast.c gh-143055: Implementation of PEP 798 (#143056) 2026-01-30 20:37:52 -08:00
ast_preprocess.c gh-143055: Implementation of PEP 798 (#143056) 2026-01-30 20:37:52 -08:00
ast_unparse.c gh-143055: Fix crash in AST unparser when unparsing dict comprehension unpacking (#145556) 2026-03-09 10:37:23 -07:00
bltinmodule.c gh-150285: Fix too long docstrings in builtins (GH-150293) 2026-05-24 15:03:32 +03:00
bootstrap_hash.c
brc.c
bytecodes.c gh-148871: make LOAD_COMMON_CONSTANT use immortal stackref borrows (GH-149625) 2026-05-28 12:27:37 +01:00
ceval.c GH-148960: Reduce the size of the debug stencils to less than half. (GH-150551) 2026-06-01 17:56:16 +01:00
ceval.h gh-142186: Allow all PEP-669 events to be per-code object and disableable (GH-146182) 2026-04-22 09:08:23 +01:00
ceval_gil.c gh-144748: Make PyErr_CheckSignals raise the exception scheduled by PyThreadState_SetAsyncExc (GH-145178) 2026-03-02 11:47:32 +01:00
ceval_macros.h GH-148960: Reduce the size of the debug stencils to less than half. (GH-150551) 2026-06-01 17:56:16 +01:00
codecs.c gh-62259: Add support of multi-byte encodings in the XML parser (GH-149860) 2026-05-26 19:40:25 +00:00
codegen.c gh-150027: Avoid copying during construction of frozenset objects (GH-150028) 2026-05-19 13:57:37 -04:00
compile.c gh-148973: fix segfault on mismatch between consts size and oparg in compiler (#148974) 2026-04-25 10:47:41 +01:00
condvar.h
config_common.h
context.c gh-150319: Replace all documentation which says "See PEP 585" (#150325) 2026-06-02 21:13:34 +01:00
critical_section.c gh-144513: Skip critical section locking during stop-the-world (gh-144524) 2026-02-06 15:14:08 +00:00
crossinterp.c gh-147998: Fix possible memory leak in _pop_preserved (crossinterp.c) (GH-147999) 2026-05-04 16:45:31 +03:00
crossinterp_data_lookup.h gh-147960: Fix memory leak in crossinterp _tuple_shared() on alloc failure (#147961) 2026-04-01 18:34:55 +02:00
crossinterp_exceptions.h gh-132775: Clean Up Cross-Interpreter Error Handling (gh-135369) 2025-06-13 16:45:21 -06:00
dtoa.c gh-145633: Remove support for ancient ARM platforms with mixed-endian doubles (#145634) 2026-03-11 12:39:24 +01:00
dup2.c
dynamic_annotations.c
dynload_hpux.c
dynload_shlib.c gh-148758: Fix dynamic loading file extensions for Cygwin (#148759) 2026-05-13 21:50:24 +00:00
dynload_stub.c
dynload_win.c gh-148690: Build Windows freethreaded binaries into separate directory and include python3t.dll on GIL-enabled (GH-149218) 2026-05-04 17:45:08 +01:00
emscripten_signal.c
emscripten_syscalls.c gh-124621: Emscripten: Fix __syscall_ioctl patch (GH-136993) 2025-07-22 15:05:26 +02:00
emscripten_trampoline.c gh-145037: Fix Emscripten trampoline with emcc >= 4.0.19 (#145038) 2026-02-26 06:21:05 +08:00
emscripten_trampoline_inner.c gh-128627: Use __builtin_wasm_test_function_pointer_signature for Emscripten trampoline (#137470) 2025-09-17 15:33:55 +01:00
errors.c gh-146480: Override the exception in _PyErr_SetKeyError() (#146486) 2026-03-27 11:20:19 +00:00
executor_cases.c.h GH-148960: Reduce the size of the debug stencils to less than half. (GH-150551) 2026-06-01 17:56:16 +01:00
fileutils.c gh-42400: Fix buffer overflow in _Py_wrealpath() for very long paths (#141529) 2025-11-18 17:34:58 +01:00
flowgraph.c gh-148871: make LOAD_COMMON_CONSTANT use immortal stackref borrows (GH-149625) 2026-05-28 12:27:37 +01:00
frame.c gh-144446: Fix some frame object thread-safety issues (gh-144479) 2026-02-06 09:43:36 -05:00
frozen.c GH-145278: freeze encodings (partially) and linecache (#148347) 2026-04-14 21:01:23 +01:00
frozenmain.c Use PyConfig_Get() in frozenmain.c (#137421) 2025-08-06 14:33:28 +02:00
future.c
gc.c GH-148726: Add heap_size to generational GC (#149195) 2026-05-04 22:14:45 +01:00
gc_free_threading.c gh-148937: revert process RSS based GC deferral (#149475) 2026-05-07 14:32:14 +03:00
gc_gil.c
generated_cases.c.h gh-148871: make LOAD_COMMON_CONSTANT use immortal stackref borrows (GH-149625) 2026-05-28 12:27:37 +01:00
getargs.c gh-146615: Fix format specifiers in Python/ directory (GH-146619) 2026-03-31 10:59:17 +03:00
getcompiler.c gh-141341: Rename COMPILER macro to _Py_COMPILER on Windows (#141342) 2025-11-10 15:50:51 +01:00
getcopyright.c
getopt.c GH-133336: Remove reserved `-J` flag for Jython (#133444) 2025-05-05 15:09:19 +00:00
getplatform.c
getversion.c gh-119132: Remove "experimental" tag from the CPython free-threading. (gh-135550) 2025-06-16 23:32:52 +09:00
hamt.c gh-150178: Fix refcount leaks in hamt allocation failure paths (#150179) 2026-05-23 14:03:40 +05:30
hashtable.c
import.c gh-150052: Resolve un-loaded lazily loaded submodules via module.__getattr__ instead of publishing lazy values (#150055) (#150744) 2026-06-02 09:58:51 +01:00
importdl.c gh-140011: Delete importdl assertion that prevents importing embedded modules from packages (GH-141605) 2025-11-26 14:12:49 +01:00
index_pool.c gh-91048: Refactor and optimize remote debugging module (#134652) 2025-05-25 20:19:29 +00:00
initconfig.c gh-149321: Remove lazy_imports=none startup mode (#149389) 2026-05-19 16:01:15 -07:00
instruction_sequence.c GH-143493: Conform to spec for generator expressions while supporting virtual iterators (GH-143569) 2026-01-16 09:11:58 +00:00
instrumentation.c gh-150379: fix ref leak in C API monitoring events (#150381) 2026-05-25 16:12:33 +05:30
interpconfig.c gh-146615: Fix format specifiers in Python/ directory (GH-146619) 2026-03-31 10:59:17 +03:00
intrinsics.c gh-150027: Avoid copying during construction of frozenset objects (GH-150028) 2026-05-19 13:57:37 -04:00
jit.c GH-148960: Reduce the size of the debug stencils to less than half. (GH-150551) 2026-06-01 17:56:16 +01:00
jit_publish.c GH-126910: Add GNU backtrace support for unwinding JIT frames (#149104) 2026-05-05 09:29:07 +01:00
jit_unwind.c gh-139808: Add branch protections for aarch64 in asm_trampoline.S (#130864) 2026-05-12 15:42:44 +00:00
legacy_tracing.c gh-148037: remove critical section from PyCode_Addr2Line (#148103) 2026-04-10 17:58:17 +05:30
lock.c gh-148820: Fix _PyRawMutex use-after-free on spurious semaphore wakeup (gh-148852) 2026-04-22 14:31:19 -04:00
marshal.c gh-150285: Fix too long docstrings in Argument Clinic code (GH-150338) 2026-05-24 16:16:12 +03:00
modsupport.c gh-146636: Py_mod_abi mandatory for modules created from slots array (GH-146855) 2026-04-02 13:54:21 +02:00
mysnprintf.c
mystrtoul.c
object_stack.c
opcode_targets.h GH-143732: SEND specialization (GH-148963) 2026-05-05 15:19:16 +01:00
optimizer.c gh-149358: Generating JIT recorder transformers and stabilizing family layouts (GH-149359) 2026-05-21 17:06:52 +01:00
optimizer_analysis.c gh-145235: Make dict watcher API thread-safe for free-threaded builds (gh-145233) 2026-05-11 11:39:55 -04:00
optimizer_bytecodes.c gh-148871: make LOAD_COMMON_CONSTANT use immortal stackref borrows (GH-149625) 2026-05-28 12:27:37 +01:00
optimizer_cases.c.h gh-148871: make LOAD_COMMON_CONSTANT use immortal stackref borrows (GH-149625) 2026-05-28 12:27:37 +01:00
optimizer_symbols.c gh-146261: JIT: protect against function version changes (#146300) 2026-04-13 02:23:47 +08:00
parking_lot.c gh-148820: Fix _PyRawMutex use-after-free on spurious semaphore wakeup (gh-148852) 2026-04-22 14:31:19 -04:00
pathconfig.c gh-133644: Remove deprecated Python initialization getter functions (#133661) 2025-05-09 11:39:23 +00:00
perf_jit_trampoline.c gh-150723: Fix perf jitdump files on macOS (#150728) 2026-06-03 01:15:34 +01:00
perf_trampoline.c gh-149156: Fix perf trampoline crash after fork (#150347) 2026-05-25 13:45:58 +01:00
preconfig.c gh-146302: make Py_IsInitialized() thread-safe and reflect true init completion (GH-146303) 2026-04-11 21:54:23 +00:00
pyarena.c
pyctype.c
pyfpe.c
pyhash.c gh-141226: Deprecate PEP-456 support for embedders (#141287) 2026-02-21 12:42:13 +01:00
pylifecycle.c gh-150644: Tag Apple system log messages as public. (#150645) 2026-06-02 06:25:46 +08:00
pymath.c
pystate.c gh-148871: make LOAD_COMMON_CONSTANT use immortal stackref borrows (GH-149625) 2026-05-28 12:27:37 +01:00
pystats.c gh-146073: Add fitness/exit quality mechanism for JIT trace frontend (GH-148089) 2026-04-24 10:37:01 +01:00
pystrcmp.c
pystrhex.c gh-149685: Use the _Py prefix for private C macros (GH-149686) 2026-05-13 19:14:05 +02:00
pystrtod.c gh-141004: soft-deprecate Py_INFINITY macro (#141033) 2025-11-12 13:44:49 +01:00
Python-ast.c gh-116021: Deprecate support for instantiating abstract AST nodes (#137865) 2026-05-02 09:50:06 -07:00
Python-tokenize.c gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770) 2026-03-24 17:47:55 +00:00
pythonrun.c gh-146615: Fix format specifiers in Python/ directory (GH-146619) 2026-03-31 10:59:17 +03:00
pytime.c gh-145731: Fix negative timestamp during DST on Windows (GH-145728) 2026-03-10 09:45:07 +01:00
qsbr.c gh-144438: Fix false sharing between QSBR and tlbc_index (gh-144554) 2026-02-17 11:12:25 -05:00
README
record_functions.c.h gh-149358: Generating JIT recorder transformers and stabilizing family layouts (GH-149359) 2026-05-21 17:06:52 +01:00
remote_debug.h gh-149619: Harden _remote_debugging error paths (#150349) 2026-05-25 23:22:46 +01:00
remote_debugging.c gh-138122: Implement frame caching in RemoteUnwinder to reduce memory reads (#142137) 2025-12-06 22:37:34 +00:00
slots.c gh-149044: Implement PEP 820 – PySlot: Unified slot system for the C API (GH-149055) 2026-05-05 09:18:04 +02:00
slots.toml gh-149044: Implement PEP 820 – PySlot: Unified slot system for the C API (GH-149055) 2026-05-05 09:18:04 +02:00
slots_generated.c gh-149044: Implement PEP 820 – PySlot: Unified slot system for the C API (GH-149055) 2026-05-05 09:18:04 +02:00
specialize.c gh-100239: expose sq_repeat helpers for BINARY_OP_EXTEND (#148791) 2026-05-08 11:12:20 +00:00
stackrefs.c gh-131527: Stackref debug borrow checker (#140599) 2025-11-05 11:12:56 -08:00
stdlib_module_names.h gh-81313: Add the math.integer module (PEP-791) (GH-133909) 2025-10-31 16:13:43 +02:00
structmember.c gh-146270: Fix PyMember_SetOne(..., NULL) not being atomic (gh-148800) 2026-05-06 09:50:24 -04:00
suggestions.c
symtable.c gh-149805: Fix SystemError when compiling __classdict__ class annotation (#149806) 2026-06-02 10:17:03 +01:00
sysmodule.c gh-150285: Fix too long docstrings in Argument Clinic code (GH-150338) 2026-05-24 16:16:12 +03:00
thread.c gh-134745: Use "pymutex" for sys.thread_info on Windows (#141140) 2025-11-06 16:10:39 +01:00
thread_nt.h gh-134745: Change PyThread_allocate_lock() implementation to PyMutex (#134747) 2025-05-30 10:15:47 +00:00
thread_pthread.h gh-137884: Added threading.get_native_id() on Illumos/Solaris (GH-137927) 2025-08-20 17:10:44 +00:00
thread_pthread_stubs.h
tier2_engine.md
traceback.c gh-145559: Add PyUnstable_DumpTraceback() and PyUnstable_DumpTracebackThreads() (#148145) 2026-05-06 15:01:12 +00:00
tracemalloc.c gh-144763: Don't detach the GIL in tracemalloc (#144779) 2026-02-18 15:57:48 +00:00
uniqueid.c
vm-state.md gh-133079: Remove Py_C_RECURSION_LIMIT & PyThreadState.c_recursion_remaining (GH-133080) 2025-04-29 12:56:20 +02:00

README 

Miscellaneous source files for the main Python shared library