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Applied patch 1337051 by Neal Norwitz, saving 4 ints on frame objects.

This commit is contained in:
Richard Jones 2006-05-23 18:28:17 +00:00
parent 69c347655d
commit cebbefc98d
4 changed files with 54 additions and 55 deletions
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4
Include/frameobject.h
View File

@ -36,10 +36,6 @@ typedef struct _frame {
in this scope */
int f_iblock; /* index in f_blockstack */
PyTryBlock f_blockstack[CO_MAXBLOCKS]; /* for try and loop blocks */
int f_nlocals; /* number of locals */
int f_ncells;
int f_nfreevars;
int f_stacksize; /* size of value stack */
PyObject *f_localsplus[1]; /* locals+stack, dynamically sized */
} PyFrameObject;

5
Misc/NEWS
View File

@ -12,6 +12,11 @@ What's New in Python 2.5 alpha 3?
Core and builtins
-----------------
- Patch #1337051: reduced size of frame objects.
- PyErr_NewException now accepts a tuple of base classes as its
"base" parameter.
- PyErr_NewException now accepts a tuple of base classes as its
"base" parameter.

64
Objects/frameobject.c
View File

@ -377,7 +377,6 @@ static PyGetSetDef frame_getsetlist[] = {
a meaning:
ob_type == &Frametype
f_back next item on free list, or NULL
f_nlocals number of locals
f_stacksize size of value stack
ob_size size of localsplus
Note that the value and block stacks are preserved -- this can save
@ -458,7 +457,7 @@ frame_traverse(PyFrameObject *f, visitproc visit, void *arg)
Py_VISIT(f->f_exc_traceback);
/* locals */
slots = f->f_nlocals + f->f_ncells + f->f_nfreevars;
slots = f->f_code->co_nlocals + PyTuple_GET_SIZE(f->f_code->co_cellvars) + PyTuple_GET_SIZE(f->f_code->co_freevars);
fastlocals = f->f_localsplus;
for (i = slots; --i >= 0; ++fastlocals)
Py_VISIT(*fastlocals);
@ -491,7 +490,7 @@ frame_clear(PyFrameObject *f)
Py_CLEAR(f->f_trace);
/* locals */
slots = f->f_nlocals + f->f_ncells + f->f_nfreevars;
slots = f->f_code->co_nlocals + PyTuple_GET_SIZE(f->f_code->co_cellvars) + PyTuple_GET_SIZE(f->f_code->co_freevars);
fastlocals = f->f_localsplus;
for (i = slots; --i >= 0; ++fastlocals)
Py_CLEAR(*fastlocals);
@ -760,7 +759,9 @@ PyFrame_FastToLocals(PyFrameObject *f)
PyObject *locals, *map;
PyObject **fast;
PyObject *error_type, *error_value, *error_traceback;
PyCodeObject *co;
Py_ssize_t j;
int ncells, nfreevars;
if (f == NULL)
return;
locals = f->f_locals;
@ -771,27 +772,24 @@ PyFrame_FastToLocals(PyFrameObject *f)
return;
}
}
map = f->f_code->co_varnames;
co = f->f_code;
map = co->co_varnames;
if (!PyTuple_Check(map))
return;
PyErr_Fetch(&error_type, &error_value, &error_traceback);
fast = f->f_localsplus;
j = PyTuple_GET_SIZE(map);
if (j > f->f_nlocals)
j = f->f_nlocals;
if (f->f_nlocals)
if (j > co->co_nlocals)
j = co->co_nlocals;
if (co->co_nlocals)
map_to_dict(map, j, locals, fast, 0);
if (f->f_ncells || f->f_nfreevars) {
if (!(PyTuple_Check(f->f_code->co_cellvars)
&& PyTuple_Check(f->f_code->co_freevars))) {
return;
}
map_to_dict(f->f_code->co_cellvars,
PyTuple_GET_SIZE(f->f_code->co_cellvars),
locals, fast + f->f_nlocals, 1);
map_to_dict(f->f_code->co_freevars,
PyTuple_GET_SIZE(f->f_code->co_freevars),
locals, fast + f->f_nlocals + f->f_ncells, 1);
ncells = PyTuple_GET_SIZE(co->co_cellvars);
nfreevars = PyTuple_GET_SIZE(co->co_freevars);
if (ncells || nfreevars) {
map_to_dict(co->co_cellvars, ncells,
locals, fast + co->co_nlocals, 1);
map_to_dict(co->co_freevars, nfreevars,
locals, fast + co->co_nlocals + ncells, 1);
}
PyErr_Restore(error_type, error_value, error_traceback);
}
@ -803,11 +801,14 @@ PyFrame_LocalsToFast(PyFrameObject *f, int clear)
PyObject *locals, *map;
PyObject **fast;
PyObject *error_type, *error_value, *error_traceback;
PyCodeObject *co;
Py_ssize_t j;
int ncells, nfreevars;
if (f == NULL)
return;
locals = f->f_locals;
map = f->f_code->co_varnames;
co = f->f_code;
map = co->co_varnames;
if (locals == NULL)
return;
if (!PyTuple_Check(map))
@ -815,20 +816,17 @@ PyFrame_LocalsToFast(PyFrameObject *f, int clear)
PyErr_Fetch(&error_type, &error_value, &error_traceback);
fast = f->f_localsplus;
j = PyTuple_GET_SIZE(map);
if (j > f->f_nlocals)
j = f->f_nlocals;
if (f->f_nlocals)
dict_to_map(f->f_code->co_varnames, j, locals, fast, 0, clear);
if (f->f_ncells || f->f_nfreevars) {
if (!(PyTuple_Check(f->f_code->co_cellvars)
&& PyTuple_Check(f->f_code->co_freevars)))
return;
dict_to_map(f->f_code->co_cellvars,
PyTuple_GET_SIZE(f->f_code->co_cellvars),
locals, fast + f->f_nlocals, 1, clear);
dict_to_map(f->f_code->co_freevars,
PyTuple_GET_SIZE(f->f_code->co_freevars),
locals, fast + f->f_nlocals + f->f_ncells, 1,
if (j > co->co_nlocals)
j = co->co_nlocals;
if (co->co_nlocals)
dict_to_map(co->co_varnames, j, locals, fast, 0, clear);
ncells = PyTuple_GET_SIZE(co->co_cellvars);
nfreevars = PyTuple_GET_SIZE(co->co_freevars);
if (ncells || nfreevars) {
dict_to_map(co->co_cellvars, ncells,
locals, fast + co->co_nlocals, 1, clear);
dict_to_map(co->co_freevars, nfreevars,
locals, fast + co->co_nlocals + ncells, 1,
clear);
}
PyErr_Restore(error_type, error_value, error_traceback);

34
Python/ceval.c
View File

@ -654,11 +654,11 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
#ifdef LLTRACE
#define PUSH(v) { (void)(BASIC_PUSH(v), \
lltrace && prtrace(TOP(), "push")); \
assert(STACK_LEVEL() <= f->f_stacksize); }
assert(STACK_LEVEL() <= co->co_stacksize); }
#define POP() ((void)(lltrace && prtrace(TOP(), "pop")), BASIC_POP())
#define STACKADJ(n) { (void)(BASIC_STACKADJ(n), \
lltrace && prtrace(TOP(), "stackadj")); \
assert(STACK_LEVEL() <= f->f_stacksize); }
assert(STACK_LEVEL() <= co->co_stacksize); }
#define EXT_POP(STACK_POINTER) (lltrace && prtrace(*(STACK_POINTER), "ext_pop"), *--(STACK_POINTER))
#else
#define PUSH(v) BASIC_PUSH(v)
@ -729,7 +729,7 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
names = co->co_names;
consts = co->co_consts;
fastlocals = f->f_localsplus;
freevars = f->f_localsplus + f->f_nlocals;
freevars = f->f_localsplus + co->co_nlocals;
first_instr = (unsigned char*) PyString_AS_STRING(co->co_code);
/* An explanation is in order for the next line.
@ -780,7 +780,7 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
READ_TIMESTAMP(loop0);
#endif
assert(stack_pointer >= f->f_valuestack); /* else underflow */
assert(STACK_LEVEL() <= f->f_stacksize); /* else overflow */
assert(STACK_LEVEL() <= co->co_stacksize); /* else overflow */
/* Do periodic things. Doing this every time through
the loop would add too much overhead, so we do it
@ -1916,17 +1916,17 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
/* Don't stomp existing exception */
if (PyErr_Occurred())
break;
if (oparg < f->f_ncells) {
v = PyTuple_GetItem(co->co_cellvars,
if (oparg < PyTuple_GET_SIZE(co->co_cellvars)) {
v = PyTuple_GET_ITEM(co->co_cellvars,
oparg);
format_exc_check_arg(
PyExc_UnboundLocalError,
UNBOUNDLOCAL_ERROR_MSG,
v);
} else {
v = PyTuple_GetItem(
v = PyTuple_GET_ITEM(
co->co_freevars,
oparg - f->f_ncells);
oparg - PyTuple_GET_SIZE(co->co_cellvars));
format_exc_check_arg(
PyExc_NameError,
UNBOUNDFREE_ERROR_MSG,
@ -2610,7 +2610,7 @@ PyEval_EvalCodeEx(PyCodeObject *co, PyObject *globals, PyObject *locals,
return NULL;
fastlocals = f->f_localsplus;
freevars = f->f_localsplus + f->f_nlocals;
freevars = f->f_localsplus + co->co_nlocals;
if (co->co_argcount > 0 ||
co->co_flags & (CO_VARARGS | CO_VARKEYWORDS)) {
@ -2746,7 +2746,7 @@ PyEval_EvalCodeEx(PyCodeObject *co, PyObject *globals, PyObject *locals,
}
/* Allocate and initialize storage for cell vars, and copy free
vars into frame. This isn't too efficient right now. */
if (f->f_ncells) {
if (PyTuple_GET_SIZE(co->co_cellvars)) {
int i = 0, j = 0, nargs, found;
char *cellname, *argname;
PyObject *c;
@ -2764,7 +2764,7 @@ PyEval_EvalCodeEx(PyCodeObject *co, PyObject *globals, PyObject *locals,
that are arguments at the beginning of the cellvars
list so that we can march over it more efficiently?
*/
for (i = 0; i < f->f_ncells; ++i) {
for (i = 0; i < PyTuple_GET_SIZE(co->co_cellvars); ++i) {
cellname = PyString_AS_STRING(
PyTuple_GET_ITEM(co->co_cellvars, i));
found = 0;
@ -2775,7 +2775,7 @@ PyEval_EvalCodeEx(PyCodeObject *co, PyObject *globals, PyObject *locals,
c = PyCell_New(GETLOCAL(j));
if (c == NULL)
goto fail;
GETLOCAL(f->f_nlocals + i) = c;
GETLOCAL(co->co_nlocals + i) = c;
found = 1;
break;
}
@ -2784,16 +2784,16 @@ PyEval_EvalCodeEx(PyCodeObject *co, PyObject *globals, PyObject *locals,
c = PyCell_New(NULL);
if (c == NULL)
goto fail;
SETLOCAL(f->f_nlocals + i, c);
SETLOCAL(co->co_nlocals + i, c);
}
}
}
if (f->f_nfreevars) {
if (PyTuple_GET_SIZE(co->co_freevars)) {
int i;
for (i = 0; i < f->f_nfreevars; ++i) {
for (i = 0; i < PyTuple_GET_SIZE(co->co_freevars); ++i) {
PyObject *o = PyTuple_GET_ITEM(closure, i);
Py_INCREF(o);
freevars[f->f_ncells + i] = o;
freevars[PyTuple_GET_SIZE(co->co_cellvars) + i] = o;
}
}
@ -4214,7 +4214,7 @@ string_concatenate(PyObject *v, PyObject *w,
}
case STORE_DEREF:
{
PyObject **freevars = f->f_localsplus + f->f_nlocals;
PyObject **freevars = f->f_localsplus + f->f_code->co_nlocals;
PyObject *c = freevars[PEEKARG()];
if (PyCell_GET(c) == v)
PyCell_Set(c, NULL);