mirror of https://github.com/python/cpython
418 lines
14 KiB
C
418 lines
14 KiB
C
#ifndef Py_INTERNAL_INTERP_H
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#define Py_INTERNAL_INTERP_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef Py_BUILD_CORE
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# error "this header requires Py_BUILD_CORE define"
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#endif
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#include <stdbool.h> // bool
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#include "pycore_ast_state.h" // struct ast_state
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#include "pycore_atexit.h" // struct atexit_state
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#include "pycore_ceval_state.h" // struct _ceval_state
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#include "pycore_code.h" // struct callable_cache
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#include "pycore_codecs.h" // struct codecs_state
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#include "pycore_context.h" // struct _Py_context_state
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#include "pycore_crossinterp.h" // struct _xidregistry
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#include "pycore_dict_state.h" // struct _Py_dict_state
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#include "pycore_dtoa.h" // struct _dtoa_state
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#include "pycore_exceptions.h" // struct _Py_exc_state
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#include "pycore_floatobject.h" // struct _Py_float_state
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#include "pycore_function.h" // FUNC_MAX_WATCHERS
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#include "pycore_gc.h" // struct _gc_runtime_state
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#include "pycore_genobject.h" // struct _Py_async_gen_state
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#include "pycore_global_objects.h"// struct _Py_interp_cached_objects
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#include "pycore_import.h" // struct _import_state
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#include "pycore_instruments.h" // _PY_MONITORING_EVENTS
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#include "pycore_list.h" // struct _Py_list_state
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#include "pycore_mimalloc.h" // struct _mimalloc_interp_state
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#include "pycore_object_state.h" // struct _py_object_state
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#include "pycore_obmalloc.h" // struct _obmalloc_state
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#include "pycore_qsbr.h" // struct _qsbr_state
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#include "pycore_tstate.h" // _PyThreadStateImpl
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#include "pycore_tuple.h" // struct _Py_tuple_state
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#include "pycore_typeobject.h" // struct types_state
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#include "pycore_unicodeobject.h" // struct _Py_unicode_state
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#include "pycore_warnings.h" // struct _warnings_runtime_state
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struct _Py_long_state {
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int max_str_digits;
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};
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// Support for stop-the-world events. This exists in both the PyRuntime struct
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// for global pauses and in each PyInterpreterState for per-interpreter pauses.
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struct _stoptheworld_state {
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PyMutex mutex; // Serializes stop-the-world attempts.
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// NOTE: The below fields are protected by HEAD_LOCK(runtime), not by the
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// above mutex.
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bool requested; // Set when a pause is requested.
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bool world_stopped; // Set when the world is stopped.
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bool is_global; // Set when contained in PyRuntime struct.
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PyEvent stop_event; // Set when thread_countdown reaches zero.
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Py_ssize_t thread_countdown; // Number of threads that must pause.
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PyThreadState *requester; // Thread that requested the pause (may be NULL).
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};
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#ifdef Py_GIL_DISABLED
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// This should be prime but otherwise the choice is arbitrary. A larger value
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// increases concurrency at the expense of memory.
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# define NUM_WEAKREF_LIST_LOCKS 127
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#endif
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/* cross-interpreter data registry */
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/* Tracks some rare events per-interpreter, used by the optimizer to turn on/off
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specific optimizations. */
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typedef struct _rare_events {
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/* Setting an object's class, obj.__class__ = ... */
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uint8_t set_class;
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/* Setting the bases of a class, cls.__bases__ = ... */
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uint8_t set_bases;
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/* Setting the PEP 523 frame eval function, _PyInterpreterState_SetFrameEvalFunc() */
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uint8_t set_eval_frame_func;
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/* Modifying the builtins, __builtins__.__dict__[var] = ... */
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uint8_t builtin_dict;
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/* Modifying a function, e.g. func.__defaults__ = ..., etc. */
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uint8_t func_modification;
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} _rare_events;
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/* interpreter state */
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/* PyInterpreterState holds the global state for one of the runtime's
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interpreters. Typically the initial (main) interpreter is the only one.
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The PyInterpreterState typedef is in Include/pytypedefs.h.
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*/
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struct _is {
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/* This struct contains the eval_breaker,
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* which is by far the hottest field in this struct
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* and should be placed at the beginning. */
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struct _ceval_state ceval;
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PyInterpreterState *next;
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int64_t id;
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int64_t id_refcount;
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int requires_idref;
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PyThread_type_lock id_mutex;
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#define _PyInterpreterState_WHENCE_NOTSET -1
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#define _PyInterpreterState_WHENCE_UNKNOWN 0
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#define _PyInterpreterState_WHENCE_RUNTIME 1
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#define _PyInterpreterState_WHENCE_LEGACY_CAPI 2
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#define _PyInterpreterState_WHENCE_CAPI 3
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#define _PyInterpreterState_WHENCE_XI 4
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#define _PyInterpreterState_WHENCE_STDLIB 5
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#define _PyInterpreterState_WHENCE_MAX 5
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long _whence;
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/* Has been initialized to a safe state.
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In order to be effective, this must be set to 0 during or right
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after allocation. */
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int _initialized;
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/* Has been fully initialized via pylifecycle.c. */
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int _ready;
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int finalizing;
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uintptr_t last_restart_version;
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struct pythreads {
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uint64_t next_unique_id;
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/* The linked list of threads, newest first. */
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PyThreadState *head;
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/* The thread currently executing in the __main__ module, if any. */
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PyThreadState *main;
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/* Used in Modules/_threadmodule.c. */
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Py_ssize_t count;
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/* Support for runtime thread stack size tuning.
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A value of 0 means using the platform's default stack size
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or the size specified by the THREAD_STACK_SIZE macro. */
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/* Used in Python/thread.c. */
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size_t stacksize;
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} threads;
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/* Reference to the _PyRuntime global variable. This field exists
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to not have to pass runtime in addition to tstate to a function.
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Get runtime from tstate: tstate->interp->runtime. */
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struct pyruntimestate *runtime;
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/* Set by Py_EndInterpreter().
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Use _PyInterpreterState_GetFinalizing()
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and _PyInterpreterState_SetFinalizing()
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to access it, don't access it directly. */
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PyThreadState* _finalizing;
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/* The ID of the OS thread in which we are finalizing. */
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unsigned long _finalizing_id;
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struct _gc_runtime_state gc;
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/* The following fields are here to avoid allocation during init.
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The data is exposed through PyInterpreterState pointer fields.
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These fields should not be accessed directly outside of init.
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All other PyInterpreterState pointer fields are populated when
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needed and default to NULL.
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For now there are some exceptions to that rule, which require
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allocation during init. These will be addressed on a case-by-case
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basis. Also see _PyRuntimeState regarding the various mutex fields.
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*/
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// Dictionary of the sys module
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PyObject *sysdict;
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// Dictionary of the builtins module
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PyObject *builtins;
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struct _import_state imports;
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/* The per-interpreter GIL, which might not be used. */
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struct _gil_runtime_state _gil;
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/* ---------- IMPORTANT ---------------------------
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The fields above this line are declared as early as
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possible to facilitate out-of-process observability
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tools. */
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struct codecs_state codecs;
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PyConfig config;
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unsigned long feature_flags;
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PyObject *dict; /* Stores per-interpreter state */
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PyObject *sysdict_copy;
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PyObject *builtins_copy;
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// Initialized to _PyEval_EvalFrameDefault().
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_PyFrameEvalFunction eval_frame;
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PyFunction_WatchCallback func_watchers[FUNC_MAX_WATCHERS];
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// One bit is set for each non-NULL entry in func_watchers
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uint8_t active_func_watchers;
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Py_ssize_t co_extra_user_count;
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freefunc co_extra_freefuncs[MAX_CO_EXTRA_USERS];
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/* cross-interpreter data and utils */
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struct _xi_state xi;
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#ifdef HAVE_FORK
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PyObject *before_forkers;
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PyObject *after_forkers_parent;
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PyObject *after_forkers_child;
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#endif
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struct _warnings_runtime_state warnings;
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struct atexit_state atexit;
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struct _stoptheworld_state stoptheworld;
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struct _qsbr_shared qsbr;
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#if defined(Py_GIL_DISABLED)
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struct _mimalloc_interp_state mimalloc;
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struct _brc_state brc; // biased reference counting state
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PyMutex weakref_locks[NUM_WEAKREF_LIST_LOCKS];
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#endif
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// Per-interpreter state for the obmalloc allocator. For the main
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// interpreter and for all interpreters that don't have their
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// own obmalloc state, this points to the static structure in
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// obmalloc.c obmalloc_state_main. For other interpreters, it is
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// heap allocated by _PyMem_init_obmalloc() and freed when the
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// interpreter structure is freed. In the case of a heap allocated
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// obmalloc state, it is not safe to hold on to or use memory after
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// the interpreter is freed. The obmalloc state corresponding to
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// that allocated memory is gone. See free_obmalloc_arenas() for
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// more comments.
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struct _obmalloc_state *obmalloc;
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PyObject *audit_hooks;
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PyType_WatchCallback type_watchers[TYPE_MAX_WATCHERS];
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PyCode_WatchCallback code_watchers[CODE_MAX_WATCHERS];
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// One bit is set for each non-NULL entry in code_watchers
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uint8_t active_code_watchers;
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struct _py_object_state object_state;
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struct _Py_unicode_state unicode;
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struct _Py_long_state long_state;
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struct _dtoa_state dtoa;
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struct _py_func_state func_state;
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struct _py_code_state code_state;
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struct _Py_dict_state dict_state;
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struct _Py_exc_state exc_state;
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struct _Py_mem_interp_free_queue mem_free_queue;
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struct ast_state ast;
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struct types_state types;
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struct callable_cache callable_cache;
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_PyOptimizerObject *optimizer;
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_PyExecutorObject *executor_list_head;
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_rare_events rare_events;
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PyDict_WatchCallback builtins_dict_watcher;
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_Py_GlobalMonitors monitors;
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bool sys_profile_initialized;
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bool sys_trace_initialized;
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Py_ssize_t sys_profiling_threads; /* Count of threads with c_profilefunc set */
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Py_ssize_t sys_tracing_threads; /* Count of threads with c_tracefunc set */
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PyObject *monitoring_callables[PY_MONITORING_TOOL_IDS][_PY_MONITORING_EVENTS];
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PyObject *monitoring_tool_names[PY_MONITORING_TOOL_IDS];
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struct _Py_interp_cached_objects cached_objects;
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struct _Py_interp_static_objects static_objects;
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/* the initial PyInterpreterState.threads.head */
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_PyThreadStateImpl _initial_thread;
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Py_ssize_t _interactive_src_count;
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};
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/* other API */
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extern void _PyInterpreterState_Clear(PyThreadState *tstate);
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static inline PyThreadState*
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_PyInterpreterState_GetFinalizing(PyInterpreterState *interp) {
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return (PyThreadState*)_Py_atomic_load_ptr_relaxed(&interp->_finalizing);
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}
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static inline unsigned long
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_PyInterpreterState_GetFinalizingID(PyInterpreterState *interp) {
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return _Py_atomic_load_ulong_relaxed(&interp->_finalizing_id);
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}
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static inline void
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_PyInterpreterState_SetFinalizing(PyInterpreterState *interp, PyThreadState *tstate) {
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_Py_atomic_store_ptr_relaxed(&interp->_finalizing, tstate);
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if (tstate == NULL) {
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_Py_atomic_store_ulong_relaxed(&interp->_finalizing_id, 0);
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}
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else {
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// XXX Re-enable this assert once gh-109860 is fixed.
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//assert(tstate->thread_id == PyThread_get_thread_ident());
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_Py_atomic_store_ulong_relaxed(&interp->_finalizing_id,
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tstate->thread_id);
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}
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}
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// Exports for the _testinternalcapi module.
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PyAPI_FUNC(int64_t) _PyInterpreterState_ObjectToID(PyObject *);
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PyAPI_FUNC(PyInterpreterState *) _PyInterpreterState_LookUpID(int64_t);
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PyAPI_FUNC(PyInterpreterState *) _PyInterpreterState_LookUpIDObject(PyObject *);
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PyAPI_FUNC(int) _PyInterpreterState_IDInitref(PyInterpreterState *);
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PyAPI_FUNC(int) _PyInterpreterState_IDIncref(PyInterpreterState *);
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PyAPI_FUNC(void) _PyInterpreterState_IDDecref(PyInterpreterState *);
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PyAPI_FUNC(int) _PyInterpreterState_IsReady(PyInterpreterState *interp);
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PyAPI_FUNC(long) _PyInterpreterState_GetWhence(PyInterpreterState *interp);
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extern void _PyInterpreterState_SetWhence(
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PyInterpreterState *interp,
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long whence);
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extern const PyConfig* _PyInterpreterState_GetConfig(PyInterpreterState *interp);
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// Get a copy of the current interpreter configuration.
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//
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// Return 0 on success. Raise an exception and return -1 on error.
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//
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// The caller must initialize 'config', using PyConfig_InitPythonConfig()
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// for example.
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//
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// Python must be preinitialized to call this method.
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// The caller must hold the GIL.
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//
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// Once done with the configuration, PyConfig_Clear() must be called to clear
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// it.
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//
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// Export for '_testinternalcapi' shared extension.
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PyAPI_FUNC(int) _PyInterpreterState_GetConfigCopy(
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struct PyConfig *config);
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// Set the configuration of the current interpreter.
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//
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// This function should be called during or just after the Python
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// initialization.
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//
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// Update the sys module with the new configuration. If the sys module was
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// modified directly after the Python initialization, these changes are lost.
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//
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// Some configuration like faulthandler or warnoptions can be updated in the
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// configuration, but don't reconfigure Python (don't enable/disable
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// faulthandler and don't reconfigure warnings filters).
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//
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// Return 0 on success. Raise an exception and return -1 on error.
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//
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// The configuration should come from _PyInterpreterState_GetConfigCopy().
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//
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// Export for '_testinternalcapi' shared extension.
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PyAPI_FUNC(int) _PyInterpreterState_SetConfig(
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const struct PyConfig *config);
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/*
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Runtime Feature Flags
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Each flag indicate whether or not a specific runtime feature
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is available in a given context. For example, forking the process
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might not be allowed in the current interpreter (i.e. os.fork() would fail).
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*/
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/* Set if the interpreter share obmalloc runtime state
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with the main interpreter. */
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#define Py_RTFLAGS_USE_MAIN_OBMALLOC (1UL << 5)
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/* Set if import should check a module for subinterpreter support. */
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#define Py_RTFLAGS_MULTI_INTERP_EXTENSIONS (1UL << 8)
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/* Set if threads are allowed. */
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#define Py_RTFLAGS_THREADS (1UL << 10)
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/* Set if daemon threads are allowed. */
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#define Py_RTFLAGS_DAEMON_THREADS (1UL << 11)
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/* Set if os.fork() is allowed. */
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#define Py_RTFLAGS_FORK (1UL << 15)
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/* Set if os.exec*() is allowed. */
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#define Py_RTFLAGS_EXEC (1UL << 16)
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extern int _PyInterpreterState_HasFeature(PyInterpreterState *interp,
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unsigned long feature);
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PyAPI_FUNC(PyStatus) _PyInterpreterState_New(
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PyThreadState *tstate,
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PyInterpreterState **pinterp);
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#define RARE_EVENT_INTERP_INC(interp, name) \
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do { \
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/* saturating add */ \
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if (interp->rare_events.name < UINT8_MAX) interp->rare_events.name++; \
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RARE_EVENT_STAT_INC(name); \
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} while (0); \
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#define RARE_EVENT_INC(name) \
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do { \
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PyInterpreterState *interp = PyInterpreterState_Get(); \
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RARE_EVENT_INTERP_INC(interp, name); \
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} while (0); \
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_INTERNAL_INTERP_H */
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