cpython/Include/cpython/sysmodule.h

#ifndef Py_CPYTHON_SYSMODULE_H
#  error "this header file must not be included directly"
#endif

Py_AuditHookFunction;

PyAPI_FUNC(int) PySys_AddAuditHook(Py_AuditHookFunction, void*);

PerfMapState;

PyAPI_FUNC(int) PyUnstable_PerfMapState_Init(void);
PyAPI_FUNC(int) PyUnstable_WritePerfMapEntry(
    const void *code_addr,
    unsigned int code_size,
    const char *entry_name);
PyAPI_FUNC(void) PyUnstable_PerfMapState_Fini(void);
PyAPI_FUNC(int) PyUnstable_CopyPerfMapFile(const char* parent_filename);
PyAPI_FUNC(int) PyUnstable_PerfTrampoline_CompileCode(PyCodeObject *);
PyAPI_FUNC(int) PyUnstable_PerfTrampoline_SetPersistAfterFork(int enable);