1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
#include "Python.h"
#include "pycore_ceval.h"
#include "pycore_frame.h"
#include "pycore_jit.h"
// This is where the calling convention changes, on platforms that require it.
// The actual change is patched in while the JIT compiler is being built, in
// Tools/jit/_targets.py. On other platforms, this function compiles to nothing.
_Py_CODEUNIT *
_ENTRY(_PyInterpreterFrame *frame, PyObject **stack_pointer, PyThreadState *tstate)
{
// This is subtle. The actual trace will return to us once it exits, so we
// need to make sure that we stay alive until then. If our trace side-exits
// into another trace, and this trace is then invalidated, the code for
// *this function* will be freed and we'll crash upon return:
PyAPI_DATA(void) _JIT_EXECUTOR;
PyObject *executor = (PyObject *)(uintptr_t)&_JIT_EXECUTOR;
Py_INCREF(executor);
// Note that this is *not* a tail call:
PyAPI_DATA(void) _JIT_CONTINUE;
_Py_CODEUNIT *target = ((jit_func)&_JIT_CONTINUE)(frame, stack_pointer, tstate);
Py_SETREF(tstate->previous_executor, executor);
return target;
}
|
