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* bpo-46528: Simplify the VM's stack manipulations (GH-30902)Brandt Bucher2022-01-26
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* bpo-43683: Streamline YIELD_VALUE and SEND (GH-30723)Mark Shannon2022-01-24
| | | | | | | | * Split YIELD_VALUE into ASYNC_GEN_WRAP; YIELD_VALUE for async generators. * Split SEND into SEND; YIELD_VALUE. * Document new opcodes.
* bpo-46409: Make generators in bytecode (GH-30633)Mark Shannon2022-01-20
| | | | | | | | | | | | * Add RETURN_GENERATOR and JUMP_NO_INTERRUPT opcodes. * Trim frame and generator by word each. * Minor refactor of frame.c * Update test.test_sys to account for smaller frames. * Treat generator functions as normal functions when evaluating and specializing.
* bpo-45923: Handle call events in bytecode (GH-30364)Mark Shannon2022-01-06
| | | | * Add a RESUME instruction to handle "call" events.
* bpo-46031: add POP_JUMP_IF_NOT_NONE and POP_JUMP_IF_NONE (GH-30019)penguin_wwy2022-01-06
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* bpo-46009: Remove GEN_START (GH-30367)Brandt Bucher2022-01-04
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* bpo-46202: Remove opcode POP_EXCEPT_AND_RERAISE (GH-30302)Irit Katriel2022-01-04
| | | | | | * bpo-46202: remove opcode POP_EXCEPT_AND_RERAISE * do not assume that an exception group is truthy
* bpo-46219, 46221: simplify except* implementation following exc_info ↵Irit Katriel2022-01-02
| | | | changes. Move helpers to exceptions.c. Do not assume that exception groups are truthy. (GH-30289)
* bpo-45711: Remove type and traceback from exc_info (GH-30122)Irit Katriel2021-12-17
| | | | | | | | * Do not PUSH/POP traceback or type to the stack as part of exc_info * Remove exc_traceback and exc_type from _PyErr_StackItem * Add to what's new, because this change breaks things like Cython
* bpo-46039: Split yield from in two (GH-30035)Mark Shannon2021-12-15
| | | | | | * Split YIELD_FROM opcode into SEND and JUMP_ABSOLUTE. * Remove YIELD_FROM opcode.
* bpo-44525: Split calls into PRECALL and CALL (GH-30011)Mark Shannon2021-12-14
| | | | | | | | | | * Add 3 new opcodes for calls: PRECALL_METHOD, CALL_NO_KW, CALL_KW. * Update specialization to handle new CALL opcodes. * Specialize call to method descriptors. * Remove old CALL opcodes: CALL_FUNCTION, CALL_METHOD, CALL_METHOD_KW, CALL_FUNCTION_KW.
* bpo-45292: [PEP-654] add except* (GH-29581)Irit Katriel2021-12-14
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* bpo-45703: Invalidate _NamespacePath cache on importlib.invalidate_ca… ↵Miro Hrončok2021-11-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (GH-29384) Consider the following directory structure: . └── PATH1 └── namespace └── sub1 └── __init__.py And both PATH1 and PATH2 in sys path: $ PYTHONPATH=PATH1:PATH2 python3.11 >>> import namespace >>> import namespace.sub1 >>> namespace.__path__ _NamespacePath(['.../PATH1/namespace']) >>> ... While this interpreter still runs, PATH2/namespace/sub2 is created: . ├── PATH1 │ └── namespace │ └── sub1 │ └── __init__.py └── PATH2 └── namespace └── sub2 └── __init__.py The newly created module cannot be imported: >>> ... >>> namespace.__path__ _NamespacePath(['.../PATH1/namespace']) >>> import namespace.sub2 Traceback (most recent call last): File "<stdin>", line 1, in <module> ModuleNotFoundError: No module named 'namespace.sub2' Calling importlib.invalidate_caches() now newly allows to import it: >>> import importlib >>> importlib.invalidate_caches() >>> namespace.__path__ _NamespacePath(['.../PATH1/namespace']) >>> import namespace.sub2 >>> namespace.__path__ _NamespacePath(['.../PATH1/namespace', '.../PATH2/namespace']) This was not previously possible.
* bpo-44525: Copy free variables in bytecode to allow calls to inner functions ↵Mark Shannon2021-11-23
| | | | | | | | | | | to be specialized (GH-29595) * Make internal APIs that take PyFrameConstructor take a PyFunctionObject instead. * Add reference to function to frame, borrow references to builtins and globals. * Add COPY_FREE_VARS instruction to allow specialization of calls to inner functions.
* bpo-45711: Re-bump the magic number and update doc (GH-29528)Brandt Bucher2021-11-12
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* bpo-45636: Merge all numeric operators (GH-29482)Brandt Bucher2021-11-10
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* bpo-45711: remove unnecessary DUP_TOP and POP in exception handling (GH-29495)Irit Katriel2021-11-10
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* bpo-44511: Improve the bytecode for class and mapping patterns (GH-26922)Brandt Bucher2021-10-27
| | | | | | | * Refactor mapping patterns and speed up class patterns. * Simplify MATCH_KEYS and MATCH_CLASS. * Add COPY opcode.
* bpo-35673: Add a public alias for namespace package __loader__ attribute ↵Barry Warsaw2021-10-20
| | | | | | | | (#29049) Rename namespace package __loader__ class to be public. Make the old name, i.e. _NamespaceLoader, an alias for the public name, for backward compatibility.
* Bump MAGIC_NUMBER to reflect change in JUMP_ABSOLUTE semantics. (GH-28829)Mark Shannon2021-10-09
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* bpo-44530: Add co_qualname field to PyCodeObject (GH-26941)Gabriele N. Tornetta2021-07-07
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* bpo-43950: Add code.co_positions (PEP 657) (GH-26955)Pablo Galindo2021-07-02
| | | | | | | | | | | | | | | This PR is part of PEP 657 and augments the compiler to emit ending line numbers as well as starting and ending columns from the AST into compiled code objects. This allows bytecodes to be correlated to the exact source code ranges that generated them. This information is made available through the following public APIs: * The `co_positions` method on code objects. * The C API function `PyCode_Addr2Location`. Co-authored-by: Batuhan Taskaya <isidentical@gmail.com> Co-authored-by: Ammar Askar <ammar@ammaraskar.com>
* bpo-44313: bump up magic (#26983)Batuhan Taskaya2021-07-01
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* bpo-44313: generate LOAD_ATTR/CALL_FUNCTION for top-level imported objects ↵Batuhan Taskaya2021-06-30
| | | | (GH-26677)
* bpo-43693: Turn localspluskinds into an object (GH-26749)Guido van Rossum2021-06-21
| | | Managing it as a bare pointer to malloc'ed bytes is just too awkward in a few places.
* bpo-43693: Eliminate unused "fast locals". (gh-26587)Eric Snow2021-06-15
| | | | | Currently, if an arg value escapes (into the closure for an inner function) we end up allocating two indices in the fast locals even though only one gets used. Additionally, using the lower index would be better in some cases, such as with no-arg `super()`. To address this, we update the compiler to fix the offsets so each variable only gets one "fast local". As a consequence, now some cell offsets are interspersed with the locals (only when an arg escapes to an inner function). https://bugs.python.org/issue43693
* Fix typos in multiple files (GH-26689)Binbin2021-06-12
| | | Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
* bpo-43693: Un-revert commit f3fa63e. (#26609)Eric Snow2021-06-08
| | | | | | | | | This was reverted in GH-26596 (commit 6d518bb) due to some bad memory accesses. * Add the MAKE_CELL opcode. (gh-26396) The memory accesses have been fixed. https://bugs.python.org/issue43693
* Revert "bpo-43693: Add the MAKE_CELL opcode and interleave fast locals ↵Pablo Galindo2021-06-08
| | | | | offsets. (gh-26396)" (GH-26597) This reverts commit 631f9938b1604d4f893417ec339b9e0fa9196fb1.
* bpo-43693: Add the MAKE_CELL opcode and interleave fast locals offsets. ↵Eric Snow2021-06-07
| | | | | | | (gh-26396) This moves logic out of the frame initialization code and into the compiler and eval loop. Doing so simplifies the runtime code and allows us to optimize it better. https://bugs.python.org/issue43693
* bpo-43693: Un-revert commits 2c1e258 and b2bf2bc. (gh-26577)Eric Snow2021-06-07
| | | | | | | | | | These were reverted in gh-26530 (commit 17c4edc) due to refleaks. * 2c1e258 - Compute deref offsets in compiler (gh-25152) * b2bf2bc - Add new internal code objects fields: co_fastlocalnames and co_fastlocalkinds. (gh-26388) This change fixes the refleaks. https://bugs.python.org/issue43693
* bpo-43693: Revert commits 2c1e2583fdc4db6b43d163239ea42b0e8394171f and ↵Pablo Galindo2021-06-04
| | | | | | | | | | | | | b2bf2bc1ece673d387341e06c8d3c2bc6e259747 (GH-26530) * Revert "bpo-43693: Compute deref offsets in compiler (gh-25152)" This reverts commit b2bf2bc1ece673d387341e06c8d3c2bc6e259747. * Revert "bpo-43693: Add new internal code objects fields: co_fastlocalnames and co_fastlocalkinds. (gh-26388)" This reverts commit 2c1e2583fdc4db6b43d163239ea42b0e8394171f. These two commits are breaking the refleak buildbots.
* bpo-43693: Compute deref offsets in compiler (gh-25152)Mark Shannon2021-06-03
| | | | | | Merges locals and cells into a single array. Saves a pointer in the interpreter and means that we don't need the LOAD_CLOSURE opcode any more https://bugs.python.org/issue43693
* bpo-43693: Add new internal code objects fields: co_fastlocalnames and ↵Eric Snow2021-06-03
| | | | | | | | | | | | | | | | | co_fastlocalkinds. (gh-26388) A number of places in the code base (notably ceval.c and frameobject.c) rely on mapping variable names to indices in the frame "locals plus" array (AKA fast locals), and thus opargs. Currently the compiler indirectly encodes that information on the code object as the tuples co_varnames, co_cellvars, and co_freevars. At runtime the dependent code must calculate the proper mapping from those, which isn't ideal and impacts performance-sensitive sections. This is something we can easily address in the compiler instead. This change addresses the situation by replacing internal use of co_varnames, etc. with a single combined tuple of names in locals-plus order, along with a minimal array mapping each to its kind (local vs. cell vs. free). These two new PyCodeObject fields, co_fastlocalnames and co_fastllocalkinds, are not exposed to Python code for now, but co_varnames, etc. are still available with the same values as before (though computed lazily). Aside from the (mild) performance impact, there are a number of other benefits: * there's now a clear, direct relationship between locals-plus and variables * code that relies on the locals-plus-to-name mapping is simpler * marshaled code objects are smaller and serialize/de-serialize faster Also note that we can take this approach further by expanding the possible values in co_fastlocalkinds to include specific argument types (e.g. positional-only, kwargs). Doing so would allow further speed-ups in _PyEval_MakeFrameVector(), which is where args get unpacked into the locals-plus array. It would also allow us to shrink marshaled code objects even further. https://bugs.python.org/issue43693
* bpo-43693: Add _PyCode_New(). (gh-26375)Eric Snow2021-05-27
| | | | | This is an internal-only API that helps us manage the many values used to create a code object. https://bugs.python.org/issue43693
* bpo-26110: Add ``CALL_METHOD_KW`` opcode to speedup method calls with ↵Ken Jin2021-05-15
| | | | | | | | | keywords (GH-26014) * Add CALL_METHOD_KW * Make CALL_METHOD branchless too since it shares the same code * Place parentheses in STACK_SHRINK
* bpo-40222: "Zero cost" exception handling (GH-25729)Mark Shannon2021-05-07
| | | | | | | | "Zero cost" exception handling. * Uses a lookup table to determine how to handle exceptions. * Removes SETUP_FINALLY and POP_TOP block instructions, eliminating (most of) the runtime overhead of try statements. * Reduces the size of the frame object by about 60%.
* bpo-43754: Eliminate bindings for partial pattern matches (GH-25229)Brandt Bucher2021-05-02
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* bpo-42739: Don't use sentinels to mark end of line table. (GH-25657)Mark Shannon2021-04-29
| | | | | * Add length parameter to PyLineTable_InitAddressRange and doen't use sentinel values at end of table. Makes the line number table more robust. * Update PyCodeAddressRange to match PEP 626.
* bpo-38605: Revert making 'from __future__ import annotations' the default ↵Pablo Galindo2021-04-21
| | | | | | (GH-25490) This reverts commits 044a1048ca93d466965afc027b91a5a9eb9ce23c and 1be456ae9d53bb1cba2b24fc86175c282d1c2169, adapting the code to changes that happened after it.
* Correct micro release number and add a couple of asserts. (GH-25224)Mark Shannon2021-04-07
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* bpo-43105: Importlib now resolves relative paths when creating module spec ↵Steve Dower2021-04-07
| | | | objects from file locations (GH-25121)
* bump the bytecode magic number (GH-25225)Dennis Sweeney2021-04-06
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* bpo-42135: Deprecate implementations of find_module() and find_loader() ↵Brett Cannon2021-04-06
| | | | (GH-25169)
* bpo-43683: Handle generator entry in bytecode (GH-25138)Mark Shannon2021-04-06
| | | | | | * Handle check for sending None to starting generator and coroutine into bytecode. * Document new bytecode and make it fail gracefully if mis-compiled.
* bpo-27129: Update magic numbers and bootstrapping for GH-25069 (GH-25172)Dennis Sweeney2021-04-04
| | | | | | | * Update magic numbers and bootstrapping for GH-25069 * add blurb Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
* bpo-43672: raise ImportWarning when calling find_loader() (GH-25119)Brett Cannon2021-04-02
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* bpo-27129: Use instruction offsets, not byte offsets, in bytecode and ↵Mark Shannon2021-04-01
| | | | | | | internally. (GH-25069) * Use instruction offset, rather than bytecode offset. Streamlines interpreter dispatch a bit, and removes most EXTENDED_ARGs for jumps. * Change some uses of PyCode_Addr2Line to PyFrame_GetLineNumber
* bpo-42134: Raise ImportWarning when calling find_module() in the import ↵Brett Cannon2021-03-30
| | | | system (GH-25044)
* bpo-42136: Deprecate module_repr() as found in importlib (GH-25022)Brett Cannon2021-03-26
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