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Hai Zhu 618b726d68 gh-146073: Add fitness/exit quality mechanism for JIT trace frontend (GH-148089) 
* Replaces ad-hoc logic for ending traces with a simple inequality: `fitness < exit_quality`
* Fitness starts high and is reduced for branches, backward edges, calls and trace length
* Exit quality reflect how good a spot that instruction is to end a trace. Closing a loop is very, specializable instructions are very low and the others in between.
2026-04-24 10:37:01 +01:00
..
clinic
gh-148110: Resolve lazy import filter names for relative imports (#148111)
2026-04-06 22:29:02 +01:00
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-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
asdl.c
…
asm_trampoline.S
gh-136459: Add perf trampoline support for macOS (#136461)
2025-07-22 16:47:24 +01:00
assemble.c
gh-146442: Fix various bugs in compiler pipeline (#146443)
2026-03-30 22:04:04 +02:00
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
ast.c
gh-143055: Implementation of PEP 798 (#143056)
2026-01-30 20:37:52 -08:00
bltinmodule.c
gh-146615: Fix format specifiers in Python/ directory (GH-146619)
2026-03-31 10:59:17 +03:00
bootstrap_hash.c
…
brc.c
…
bytecodes.c
gh-146073: Add fitness/exit quality mechanism for JIT trace frontend (GH-148089)
2026-04-24 10:37:01 +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-146031: Allow keeping specialization enabled when specifying eval frame function (#146032)
2026-04-16 09:44:26 -07:00
ceval.c
GH-126910: Build/link the JIT shim in the Python interpreter (#148872)
2026-04-23 12:23:18 +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
codecs.c
Python/codecs.c: Remove unused forward declaration (#139511)
2025-10-03 13:33:49 +02:00
codegen.c
GH-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. (GH-147967)
2026-04-16 15:22:22 +01:00
compile.c
gh-137814: Fix __qualname__ of __annotate__ (#137842)
2026-04-15 21:52:30 -07:00
condvar.h
…
config_common.h
…
context.c
gh-116738: make entering of contextvars.Context thread safe (#143074)
2026-01-06 12:24:02 +05:30
critical_section.c
gh-144513: Skip critical section locking during stop-the-world (gh-144524)
2026-02-06 15:14:08 +00:00
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
crossinterp.c
gh-148072: Cache pickle.dumps/loads per interpreter in XIData (GH-148125)
2026-04-06 11:37:02 -04:00
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-146636: PEP 803: add Py_TARGET_ABI3T and .abi3t.so extension (GH-146637)
2026-04-01 16:14:59 +02:00
dynload_stub.c
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dynload_win.c
gh-131942: Use the Python-specific Py_DEBUG macro rather than _DEBUG in Windows-related C code (GH-131944)
2025-05-08 15:01:25 +00:00
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_inner.c
gh-128627: Use __builtin_wasm_test_function_pointer_signature for Emscripten trampoline (#137470)
2025-09-17 15:33:55 +01:00
emscripten_trampoline.c
gh-145037: Fix Emscripten trampoline with emcc >= 4.0.19 (#145038)
2026-02-26 06:21:05 +08:00
errors.c
gh-146480: Override the exception in _PyErr_SetKeyError() (#146486)
2026-03-27 11:20:19 +00:00
executor_cases.c.h
GH-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. (GH-147967)
2026-04-16 15:22:22 +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-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. (GH-147967)
2026-04-16 15:22:22 +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_free_threading.c
gh-146527: Heap-allocate gc_stats to avoid bloating PyInterpreterState (#148057)
2026-04-04 18:42:30 +01:00
gc_gil.c
…
gc.c
gh-146527: Heap-allocate gc_stats to avoid bloating PyInterpreterState (#148057)
2026-04-04 18:42:30 +01:00
generated_cases.c.h
gh-146073: Add fitness/exit quality mechanism for JIT trace frontend (GH-148089)
2026-04-24 10:37:01 +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
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getopt.c
GH-133336: Remove reserved `-J` flag for Jython (#133444)
2025-05-05 15:09:19 +00:00
getplatform.c
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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-145247: Use _PyTuple_FromPair in Parser and Python (#145842)
2026-03-11 21:08:18 +00:00
hashtable.c
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import.c
gh-148110: Resolve lazy import filter names for relative imports (#148111)
2026-04-06 22:29:02 +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-146244: Fix initconfig.c SET_ITEM macro leaks dict on expression failure (GH-146246)
2026-03-25 19:09:56 +00:00
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-142186: Allow all PEP-669 events to be per-code object and disableable (GH-146182)
2026-04-22 09:08:23 +01:00
interpconfig.c
gh-146615: Fix format specifiers in Python/ directory (GH-146619)
2026-03-31 10:59:17 +03:00
intrinsics.c
gh-111489: Remove _PyTuple_FromArray() alias (#139973)
2025-10-11 22:58:14 +02:00
jit.c
GH-126910: Build/link the JIT shim in the Python interpreter (#148872)
2026-04-23 12:23:18 +01:00
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-148653: Fix some marshal errors related to recursive immutable objects (GH-148698)
2026-04-18 11:24:33 +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-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. (GH-147967)
2026-04-16 15:22:22 +01:00
optimizer_analysis.c
gh-148510: restore func_version check in _LOAD_ATTR_PROPERTY_FRAME (GH-148528)
2026-04-14 22:44:39 +08:00
optimizer_bytecodes.c
gh-146393: Remove special character in optimizer_bytecodes.c (#148693)
2026-04-17 16:52:16 +00:00
optimizer_cases.c.h
GH-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. (GH-147967)
2026-04-16 15:22:22 +01:00
optimizer_symbols.c
gh-146261: JIT: protect against function version changes (#146300)
2026-04-13 02:23:47 +08:00
optimizer.c
gh-146073: Add fitness/exit quality mechanism for JIT trace frontend (GH-148089)
2026-04-24 10:37:01 +01:00
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-144194: Fix mmap failure check in perf_jit_trampoline.c (#143713)
2026-01-28 13:30:17 +00:00
perf_trampoline.c
gh-144766: Fix a crash in fork child process when perf support is enabled. (#144795)
2026-02-14 11:41:28 +00:00
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-126910: Build/link the JIT shim in the Python interpreter (#148872)
2026-04-23 12:23:18 +01:00
pymath.c
…
pystate.c
gh-146073: Add fitness/exit quality mechanism for JIT trace frontend (GH-148089)
2026-04-24 10:37:01 +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-148474: Fix _Py_hexlify_simd compilation with older clang (#148475)
2026-04-16 11:21:23 +05:30
pystrtod.c
gh-141004: soft-deprecate Py_INFINITY macro (#141033)
2025-11-12 13:44:49 +01:00
Python-ast.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
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-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. (GH-147967)
2026-04-16 15:22:22 +01:00
remote_debug.h
gh-144316: Fix missing exception in _remote_debugging with debug=False (#144442)
2026-02-26 21:14:34 +00:00
remote_debugging.c
gh-138122: Implement frame caching in RemoteUnwinder to reduce memory reads (#142137)
2025-12-06 22:37:34 +00:00
specialize.c
gh-146031: Allow keeping specialization enabled when specifying eval frame function (#146032)
2026-04-16 09:44:26 -07:00
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-41779: Allow defining any __slots__ for a class derived from tuple (GH-141763)
2026-01-06 11:36:00 +02:00
suggestions.c
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symtable.c
gh-137814: Fix __qualname__ of __annotate__ (#137842)
2026-04-15 21:52:30 -07:00
sysmodule.c
gh-146302: make Py_IsInitialized() thread-safe and reflect true init completion (GH-146303)
2026-04-11 21:54:23 +00:00
thread_nt.h
gh-134745: Change PyThread_allocate_lock() implementation to PyMutex (#134747)
2025-05-30 10:15:47 +00:00
thread_pthread_stubs.h
…
thread_pthread.h
gh-137884: Added threading.get_native_id() on Illumos/Solaris (GH-137927)
2025-08-20 17:10:44 +00:00
thread.c
gh-134745: Use "pymutex" for sys.thread_info on Windows (#141140)
2025-11-06 16:10:39 +01:00
tier2_engine.md
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traceback.c
gh-145792: Fix incorrect alloca allocation size in traceback.c (#145814)
2026-03-13 13:15:26 +01:00
tracemalloc.c
gh-144763: Don't detach the GIL in tracemalloc (#144779)
2026-02-18 15:57:48 +00:00
uniqueid.c
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vm-state.md
…

README 

Miscellaneous source files for the main Python shared library
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