diff options
Diffstat (limited to 'Python/pylifecycle.c')
| -rw-r--r-- | Python/pylifecycle.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c index 51192bd5bb9..13519762fa8 100644 --- a/Python/pylifecycle.c +++ b/Python/pylifecycle.c @@ -29,6 +29,7 @@ #include "pycore_tuple.h" // _PyTuple_InitTypes() #include "pycore_typeobject.h" // _PyTypes_InitTypes() #include "pycore_unicodeobject.h" // _PyUnicode_InitTypes() +#include "opcode.h" extern void _PyIO_Fini(void); @@ -779,6 +780,21 @@ pycore_init_types(PyInterpreterState *interp) return _PyStatus_OK(); } +static const uint8_t INTERPRETER_TRAMPOLINE_INSTRUCTIONS[] = { + /* Put a NOP at the start, so that the IP points into + * the code, rather than before it */ + NOP, 0, + INTERPRETER_EXIT, 0, + /* RESUME at end makes sure that the frame appears incomplete */ + RESUME, 0 +}; + +static const _PyShimCodeDef INTERPRETER_TRAMPOLINE_CODEDEF = { + INTERPRETER_TRAMPOLINE_INSTRUCTIONS, + sizeof(INTERPRETER_TRAMPOLINE_INSTRUCTIONS), + 1, + "<interpreter trampoline>" +}; static PyStatus pycore_init_builtins(PyThreadState *tstate) @@ -812,7 +828,10 @@ pycore_init_builtins(PyThreadState *tstate) PyObject *object__getattribute__ = _PyType_Lookup(&PyBaseObject_Type, &_Py_ID(__getattribute__)); assert(object__getattribute__); interp->callable_cache.object__getattribute__ = object__getattribute__; - + interp->interpreter_trampoline = _Py_MakeShimCode(&INTERPRETER_TRAMPOLINE_CODEDEF); + if (interp->interpreter_trampoline == NULL) { + return _PyStatus_ERR("failed to create interpreter trampoline."); + } if (_PyBuiltins_AddExceptions(bimod) < 0) { return _PyStatus_ERR("failed to add exceptions to builtins"); } |