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sysmodule.c
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2110 lines (1879 loc) · 59.4 KB
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/* System module */
/*
Various bits of information used by the interpreter are collected in
module 'sys'.
Function member:
- exit(sts): raise SystemExit
Data members:
- stdin, stdout, stderr: standard file objects
- modules: the table of modules (dictionary)
- path: module search path (list of strings)
- argv: script arguments (list of strings)
- ps1, ps2: optional primary and secondary prompts (strings)
*/
#include "Python.h"
#include "code.h"
#include "frameobject.h"
#include "pythread.h"
#include "osdefs.h"
#ifdef MS_WINDOWS
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif /* MS_WINDOWS */
#ifdef MS_COREDLL
extern void *PyWin_DLLhModule;
/* A string loaded from the DLL at startup: */
extern const char *PyWin_DLLVersionString;
#endif
#ifdef __VMS
#include <unixlib.h>
#endif
#ifdef HAVE_LANGINFO_H
#include <locale.h>
#include <langinfo.h>
#endif
PyObject *
PySys_GetObject(const char *name)
{
PyThreadState *tstate = PyThreadState_GET();
PyObject *sd = tstate->interp->sysdict;
if (sd == NULL)
return NULL;
return PyDict_GetItemString(sd, name);
}
int
PySys_SetObject(const char *name, PyObject *v)
{
PyThreadState *tstate = PyThreadState_GET();
PyObject *sd = tstate->interp->sysdict;
if (v == NULL) {
if (PyDict_GetItemString(sd, name) == NULL)
return 0;
else
return PyDict_DelItemString(sd, name);
}
else
return PyDict_SetItemString(sd, name, v);
}
/* Write repr(o) to sys.stdout using sys.stdout.encoding and 'backslashreplace'
error handler. If sys.stdout has a buffer attribute, use
sys.stdout.buffer.write(encoded), otherwise redecode the string and use
sys.stdout.write(redecoded).
Helper function for sys_displayhook(). */
static int
sys_displayhook_unencodable(PyObject *outf, PyObject *o)
{
PyObject *stdout_encoding = NULL;
PyObject *encoded, *escaped_str, *repr_str, *buffer, *result;
char *stdout_encoding_str;
int ret;
_Py_IDENTIFIER(encoding);
_Py_IDENTIFIER(buffer);
stdout_encoding = _PyObject_GetAttrId(outf, &PyId_encoding);
if (stdout_encoding == NULL)
goto error;
stdout_encoding_str = _PyUnicode_AsString(stdout_encoding);
if (stdout_encoding_str == NULL)
goto error;
repr_str = PyObject_Repr(o);
if (repr_str == NULL)
goto error;
encoded = PyUnicode_AsEncodedString(repr_str,
stdout_encoding_str,
"backslashreplace");
Py_DECREF(repr_str);
if (encoded == NULL)
goto error;
buffer = _PyObject_GetAttrId(outf, &PyId_buffer);
if (buffer) {
_Py_IDENTIFIER(write);
result = _PyObject_CallMethodId(buffer, &PyId_write, "(O)", encoded);
Py_DECREF(buffer);
Py_DECREF(encoded);
if (result == NULL)
goto error;
Py_DECREF(result);
}
else {
PyErr_Clear();
escaped_str = PyUnicode_FromEncodedObject(encoded,
stdout_encoding_str,
"strict");
Py_DECREF(encoded);
if (PyFile_WriteObject(escaped_str, outf, Py_PRINT_RAW) != 0) {
Py_DECREF(escaped_str);
goto error;
}
Py_DECREF(escaped_str);
}
ret = 0;
goto finally;
error:
ret = -1;
finally:
Py_XDECREF(stdout_encoding);
return ret;
}
static PyObject *
sys_displayhook(PyObject *self, PyObject *o)
{
PyObject *outf;
PyInterpreterState *interp = PyThreadState_GET()->interp;
PyObject *modules = interp->modules;
PyObject *builtins = PyDict_GetItemString(modules, "builtins");
int err;
_Py_IDENTIFIER(_);
if (builtins == NULL) {
PyErr_SetString(PyExc_RuntimeError, "lost builtins module");
return NULL;
}
/* Print value except if None */
/* After printing, also assign to '_' */
/* Before, set '_' to None to avoid recursion */
if (o == Py_None) {
Py_INCREF(Py_None);
return Py_None;
}
if (_PyObject_SetAttrId(builtins, &PyId__, Py_None) != 0)
return NULL;
outf = PySys_GetObject("stdout");
if (outf == NULL || outf == Py_None) {
PyErr_SetString(PyExc_RuntimeError, "lost sys.stdout");
return NULL;
}
if (PyFile_WriteObject(o, outf, 0) != 0) {
if (PyErr_ExceptionMatches(PyExc_UnicodeEncodeError)) {
/* repr(o) is not encodable to sys.stdout.encoding with
* sys.stdout.errors error handler (which is probably 'strict') */
PyErr_Clear();
err = sys_displayhook_unencodable(outf, o);
if (err)
return NULL;
}
else {
return NULL;
}
}
if (PyFile_WriteString("\n", outf) != 0)
return NULL;
if (_PyObject_SetAttrId(builtins, &PyId__, o) != 0)
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
PyDoc_STRVAR(displayhook_doc,
"displayhook(object) -> None\n"
"\n"
"Print an object to sys.stdout and also save it in builtins._\n"
);
static PyObject *
sys_excepthook(PyObject* self, PyObject* args)
{
PyObject *exc, *value, *tb;
if (!PyArg_UnpackTuple(args, "excepthook", 3, 3, &exc, &value, &tb))
return NULL;
PyErr_Display(exc, value, tb);
Py_INCREF(Py_None);
return Py_None;
}
PyDoc_STRVAR(excepthook_doc,
"excepthook(exctype, value, traceback) -> None\n"
"\n"
"Handle an exception by displaying it with a traceback on sys.stderr.\n"
);
static PyObject *
sys_exc_info(PyObject *self, PyObject *noargs)
{
PyThreadState *tstate;
tstate = PyThreadState_GET();
return Py_BuildValue(
"(OOO)",
tstate->exc_type != NULL ? tstate->exc_type : Py_None,
tstate->exc_value != NULL ? tstate->exc_value : Py_None,
tstate->exc_traceback != NULL ?
tstate->exc_traceback : Py_None);
}
PyDoc_STRVAR(exc_info_doc,
"exc_info() -> (type, value, traceback)\n\
\n\
Return information about the most recent exception caught by an except\n\
clause in the current stack frame or in an older stack frame."
);
static PyObject *
sys_exit(PyObject *self, PyObject *args)
{
PyObject *exit_code = 0;
if (!PyArg_UnpackTuple(args, "exit", 0, 1, &exit_code))
return NULL;
/* Raise SystemExit so callers may catch it or clean up. */
PyErr_SetObject(PyExc_SystemExit, exit_code);
return NULL;
}
PyDoc_STRVAR(exit_doc,
"exit([status])\n\
\n\
Exit the interpreter by raising SystemExit(status).\n\
If the status is omitted or None, it defaults to zero (i.e., success).\n\
If the status is an integer, it will be used as the system exit status.\n\
If it is another kind of object, it will be printed and the system\n\
exit status will be one (i.e., failure)."
);
static PyObject *
sys_getdefaultencoding(PyObject *self)
{
return PyUnicode_FromString(PyUnicode_GetDefaultEncoding());
}
PyDoc_STRVAR(getdefaultencoding_doc,
"getdefaultencoding() -> string\n\
\n\
Return the current default string encoding used by the Unicode \n\
implementation."
);
static PyObject *
sys_getfilesystemencoding(PyObject *self)
{
if (Py_FileSystemDefaultEncoding)
return PyUnicode_FromString(Py_FileSystemDefaultEncoding);
PyErr_SetString(PyExc_RuntimeError,
"filesystem encoding is not initialized");
return NULL;
}
PyDoc_STRVAR(getfilesystemencoding_doc,
"getfilesystemencoding() -> string\n\
\n\
Return the encoding used to convert Unicode filenames in\n\
operating system filenames."
);
static PyObject *
sys_intern(PyObject *self, PyObject *args)
{
PyObject *s;
if (!PyArg_ParseTuple(args, "U:intern", &s))
return NULL;
if (PyUnicode_CheckExact(s)) {
Py_INCREF(s);
PyUnicode_InternInPlace(&s);
return s;
}
else {
PyErr_Format(PyExc_TypeError,
"can't intern %.400s", s->ob_type->tp_name);
return NULL;
}
}
PyDoc_STRVAR(intern_doc,
"intern(string) -> string\n\
\n\
``Intern'' the given string. This enters the string in the (global)\n\
table of interned strings whose purpose is to speed up dictionary lookups.\n\
Return the string itself or the previously interned string object with the\n\
same value.");
/*
* Cached interned string objects used for calling the profile and
* trace functions. Initialized by trace_init().
*/
static PyObject *whatstrings[7] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL};
static int
trace_init(void)
{
static char *whatnames[7] = {"call", "exception", "line", "return",
"c_call", "c_exception", "c_return"};
PyObject *name;
int i;
for (i = 0; i < 7; ++i) {
if (whatstrings[i] == NULL) {
name = Py
7022
Unicode_InternFromString(whatnames[i]);
if (name == NULL)
return -1;
whatstrings[i] = name;
}
}
return 0;
}
static PyObject *
call_trampoline(PyThreadState *tstate, PyObject* callback,
PyFrameObject *frame, int what, PyObject *arg)
{
PyObject *args = PyTuple_New(3);
PyObject *whatstr;
PyObject *result;
if (args == NULL)
return NULL;
Py_INCREF(frame);
whatstr = whatstrings[what];
Py_INCREF(whatstr);
if (arg == NULL)
arg = Py_None;
Py_INCREF(arg);
PyTuple_SET_ITEM(args, 0, (PyObject *)frame);
PyTuple_SET_ITEM(args, 1, whatstr);
PyTuple_SET_ITEM(args, 2, arg);
/* call the Python-level function */
PyFrame_FastToLocals(frame);
result = PyEval_CallObject(callback, args);
PyFrame_LocalsToFast(frame, 1);
if (result == NULL)
PyTraceBack_Here(frame);
/* cleanup */
Py_DECREF(args);
return result;
}
static int
profile_trampoline(PyObject *self, PyFrameObject *frame,
int what, PyObject *arg)
{
PyThreadState *tstate = frame->f_tstate;
PyObject *result;
if (arg == NULL)
arg = Py_None;
result = call_trampoline(tstate, self, frame, what, arg);
if (result == NULL) {
PyEval_SetProfile(NULL, NULL);
return -1;
}
Py_DECREF(result);
return 0;
}
static int
trace_trampoline(PyObject *self, PyFrameObject *frame,
int what, PyObject *arg)
{
PyThreadState *tstate = frame->f_tstate;
PyObject *callback;
PyObject *result;
if (what == PyTrace_CALL)
callback = self;
else
callback = frame->f_trace;
if (callback == NULL)
return 0;
result = call_trampoline(tstate, callback, frame, what, arg);
if (result == NULL) {
PyEval_SetTrace(NULL, NULL);
Py_CLEAR(frame->f_trace);
return -1;
}
if (result != Py_None) {
PyObject *temp = frame->f_trace;
frame->f_trace = NULL;
Py_XDECREF(temp);
frame->f_trace = result;
}
else {
Py_DECREF(result);
}
return 0;
}
static PyObject *
sys_settrace(PyObject *self, PyObject *args)
{
if (trace_init() == -1)
return NULL;
if (args == Py_None)
PyEval_SetTrace(NULL, NULL);
else
PyEval_SetTrace(trace_trampoline, args);
Py_INCREF(Py_None);
return Py_None;
}
PyDoc_STRVAR(settrace_doc,
"settrace(function)\n\
\n\
Set the global debug tracing function. It will be called on each\n\
function call. See the debugger chapter in the library manual."
);
static PyObject *
sys_gettrace(PyObject *self, PyObject *args)
{
PyThreadState *tstate = PyThreadState_GET();
PyObject *temp = tstate->c_traceobj;
if (temp == NULL)
temp = Py_None;
Py_INCREF(temp);
return temp;
}
PyDoc_STRVAR(gettrace_doc,
"gettrace()\n\
\n\
Return the global debug tracing function set with sys.settrace.\n\
See the debugger chapter in the library manual."
);
static PyObject *
sys_setprofile(PyObject *self, PyObject *args)
{
if (trace_init() == -1)
return NULL;
if (args == Py_None)
PyEval_SetProfile(NULL, NULL);
else
PyEval_SetProfile(profile_trampoline, args);
Py_INCREF(Py_None);
return Py_None;
}
PyDoc_STRVAR(setprofile_doc,
"setprofile(function)\n\
\n\
Set the profiling function. It will be called on each function call\n\
and return. See the profiler chapter in the library manual."
);
static PyObject *
sys_getprofile(PyObject *self, PyObject *args)
{
PyThreadState *tstate = PyThreadState_GET();
PyObject *temp = tstate->c_profileobj;
if (temp == NULL)
temp = Py_None;
Py_INCREF(temp);
return temp;
}
PyDoc_STRVAR(getprofile_doc,
"getprofile()\n\
\n\
Return the profiling function set with sys.setprofile.\n\
See the profiler chapter in the library manual."
);
static int _check_interval = 100;
static PyObject *
sys_setcheckinterval(PyObject *self, PyObject *args)
{
if (PyErr_WarnEx(PyExc_DeprecationWarning,
"sys.getcheckinterval() and sys.setcheckinterval() "
"are deprecated. Use sys.setswitchinterval() "
"instead.", 1) < 0)
return NULL;
if (!PyArg_ParseTuple(args, "i:setcheckinterval", &_check_interval))
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
PyDoc_STRVAR(setcheckinterval_doc,
"setcheckinterval(n)\n\
\n\
Tell the Python interpreter to check for asynchronous events every\n\
n instructions. This also affects how often thread switches occur."
);
static PyObject *
sys_getcheckinterval(PyObject *self, PyObject *args)
{
if (PyErr_WarnEx(PyExc_DeprecationWarning,
"sys.getcheckinterval() and sys.setcheckinterval() "
"are deprecated. Use sys.getswitchinterval() "
"instead.", 1) < 0)
return NULL;
return PyLong_FromLong(_check_interval);
}
PyDoc_STRVAR(getcheckinterval_doc,
"getcheckinterval() -> current check interval; see setcheckinterval()."
);
#ifdef WITH_THREAD
static PyObject *
sys_setswitchinterval(PyObject *self, PyObject *args)
{
double d;
if (!PyArg_ParseTuple(args, "d:setswitchinterval", &d))
return NULL;
if (d <= 0.0) {
PyErr_SetString(PyExc_ValueError,
"switch interval must be strictly positive");
return NULL;
}
_PyEval_SetSwitchInterval((unsigned long) (1e6 * d));
Py_INCREF(Py_None);
return Py_None;
}
PyDoc_STRVAR(setswitchinterval_doc,
"setswitchinterval(n)\n\
\n\
Set the ideal thread switching delay inside the Python interpreter\n\
The actual frequency of switching threads can be lower if the\n\
interpreter executes long sequences of uninterruptible code\n\
(this is implementation-specific and workload-dependent).\n\
\n\
The parameter must represent the desired switching delay in seconds\n\
A typical value is 0.005 (5 milliseconds)."
);
static PyObject *
sys_getswitchinterval(PyObject *self, PyObject *args)
{
return PyFloat_FromDouble(1e-6 * _PyEval_GetSwitchInterval());
}
PyDoc_STRVAR(getswitchinterval_doc,
"getswitchinterval() -> current thread switch interval; see setswitchinterval()."
);
#endif /* WITH_THREAD */
#ifdef WITH_TSC
static PyObject *
sys_settscdump(PyObject *self, PyObject *args)
{
int bool;
PyThreadState *tstate = PyThreadState_Get();
if (!PyArg_ParseTuple(args, "i:settscdump", &bool))
return NULL;
if (bool)
tstate->interp->tscdump = 1;
else
tstate->interp->tscdump = 0;
Py_INCREF(Py_None);
return Py_None;
}
PyDoc_STRVAR(settscdump_doc,
"settscdump(bool)\n\
\n\
If true, tell the Python interpreter to dump VM measurements to\n\
stderr. If false, turn off dump. The measurements are based on the\n\
processor's time-stamp counter."
);
#endif /* TSC */
static PyObject *
sys_setrecursionlimit(PyObject *self, PyObject *args)
{
int new_limit;
if (!PyArg_ParseTuple(args, "i:setrecursionlimit", &new_limit))
return NULL;
if (new_limit <= 0) {
PyErr_SetString(PyExc_ValueError,
"recursion limit must be positive");
return NULL;
}
Py_SetRecursionLimit(new_limit);
Py_INCREF(Py_None);
return Py_None;
}
static PyTypeObject Hash_InfoType;
PyDoc_STRVAR(hash_info_doc,
"hash_info\n\
\n\
A struct sequence providing parameters used for computing\n\
numeric hashes. The attributes are read only.");
static PyStructSequence_Field hash_info_fields[] = {
{"width", "width of the type used for hashing, in bits"},
{"modulus", "prime number giving the modulus on which the hash "
"function is based"},
{"inf", "value to be used for hash of a positive infinity"},
{"nan", "value to be used for hash of a nan"},
{"imag", "multiplier used for the imaginary part of a complex number"},
{NULL, NULL}
};
static PyStructSequence_Desc hash_info_desc = {
"sys.hash_info",
hash_info_doc,
hash_info_fields,
5,
};
static PyObject *
get_hash_info(void)
{
PyObject *hash_info;
int field = 0;
hash_info = PyStructSequence_New(&Hash_InfoType);
if (hash_info == NULL)
return NULL;
PyStructSequence_SET_ITEM(hash_info, field++,
PyLong_FromLong(8*sizeof(Py_hash_t)));
PyStructSequence_SET_ITEM(hash_info, field++,
PyLong_FromSsize_t(_PyHASH_MODULUS));
PyStructSequence_SET_ITEM(hash_info, field++,
PyLong_FromLong(_PyHASH_INF));
PyStructSequence_SET_ITEM(hash_info, field++,
PyLong_FromLong(_PyHASH_NAN));
PyStructSequence_SET_ITEM(hash_info, field++,
PyLong_FromLong(_PyHASH_IMAG));
if (PyErr_Occurred()) {
Py_CLEAR(hash_info);
return NULL;
}
return hash_info;
}
PyDoc_STRVAR(setrecursionlimit_doc,
"setrecursionlimit(n)\n\
\n\
Set the maximum depth of the Python interpreter stack to n. This\n\
limit prevents infinite recursion from causing an overflow of the C\n\
stack and crashing Python. The highest possible limit is platform-\n\
dependent."
);
static PyObject *
sys_getrecursionlimit(PyObject *self)
{
return PyLong_FromLong(Py_GetRecursionLimit());
}
PyDoc_STRVAR(getrecursionlimit_doc,
"getrecursionlimit()\n\
\n\
Return the current value of the recursion limit, the maximum depth\n\
of the Python interpreter stack. This limit prevents infinite\n\
recursion from causing an overflow of the C stack and crashing Python."
);
#ifdef MS_WINDOWS
PyDoc_STRVAR(getwindowsversion_doc,
"getwindowsversion()\n\
\n\
Return information about the running version of Windows as a named tuple.\n\
The members are named: major, minor, build, platform, service_pack,\n\
service_pack_major, service_pack_minor, suite_mask, and product_type. For\n\
backward compatibility, only the first 5 items are available by indexing.\n\
All elements are numbers, except service_pack which is a string. Platform\n\
may be 0 for win32s, 1 for Windows 9x/ME, 2 for Windows NT/2000/XP/Vista/7,\n\
3 for Windows CE. Product_type may be 1 for a workstation, 2 for a domain\n\
controller, 3 for a server."
);
static PyTypeObject WindowsVersionType = {0, 0, 0, 0, 0, 0};
static PyStructSequence_Field windows_version_fields[] = {
{"major", "Major version number"},
{"minor", "Minor version number"},
{"build", "Build number"},
{"platform", "Operating system platform"},
{"service_pack", "Latest Service Pack installed on the system"},
{"service_pack_major", "Service Pack major version number"},
{"service_pack_minor", "Service Pack minor version number"},
{"suite_mask", "Bit mask identifying available product suites"},
{"product_type", "System product type"},
{0}
};
static PyStructSequence_Desc windows_version_desc = {
"sys.getwindowsversion", /* name */
getwindowsversion_doc, /* doc */
windows_version_fields, /* fields */
5 /* For backward compatibility,
only the first 5 items are accessible
via indexing, the rest are name only */
};
static PyObject *
sys_getwindowsversion(PyObject *self)
{
PyObject *version;
int pos = 0;
OSVERSIONINFOEX ver;
ver.dwOSVersionInfoSize = sizeof(ver);
if (!GetVersionEx((OSVERSIONINFO*) &ver))
return PyErr_SetFromWindowsErr(0);
version = PyStructSequence_New(&WindowsVersionType);
if (version == NULL)
return NULL;
PyStructSequence_SET_ITEM(version, pos++, PyLong_FromLong(ver.dwMajorVersion));
PyStructSequence_SET_ITEM(version, pos++, PyLong_FromLong(ver.dwMinorVersion));
PyStructSequence_SET_ITEM(version, pos++, PyLong_FromLong(ver.dwBuildNumber));
PyStructSequence_SET_ITEM(version, pos++, PyLong_FromLong(ver.dwPlatformId));
PyStructSequence_SET_ITEM(version, pos++, PyUnicode_FromString(ver.szCSDVersion));
PyStructSequence_SET_ITEM(version, pos++, PyLong_FromLong(ver.wServicePackMajor));
PyStructSequence_SET_ITEM(version, pos++, PyLong_FromLong(ver.wServicePackMinor));
PyStructSequence_SET_ITEM(version, pos++, PyLong_FromLong(ver.wSuiteMask));
PyStructSequence_SET_ITEM(version, pos++, PyLong_FromLong(ver.wProductType));
if (PyErr_Occurred()) {
Py_DECREF(version);
return NULL;
}
return version;
}
#endif /* MS_WINDOWS */
#ifdef HAVE_DLOPEN
static PyObject *
sys_setdlopenflags(PyObject *self, PyObject *args)
{
int new_val;
PyThreadState *tstate = PyThreadState_GET();
if (!PyArg_ParseTuple(args, "i:setdlopenflags", &new_val))
return NULL;
if (!tstate)
return NULL;
tstate->interp->dlopenflags = new_val;
Py_INCREF(Py_None);
return Py_None;
}
PyDoc_STRVAR(setdlopenflags_doc,
"setdlopenflags(n) -> None\n\
\n\
Set the flags used by the interpreter for dlopen calls, such as when the\n\
interpreter loads extension modules. Among other things, this will enable\n\
a lazy resolving of symbols when importing a module, if called as\n\
sys.setdlopenflags(0). To share symbols across extension modules, call as\n\
sys.setdlopenflags(ctypes.RTLD_GLOBAL). Symbolic names for the flag modules\n\
can be found in the os module (RTLD_xxx constants, e.g. os.RTLD_LAZY).");
static PyObject *
sys_getdlopenflags(PyObject *self, PyObject *args)
{
PyThreadState *tstate = PyThreadState_GET();
if (!tstate)
return NULL;
return PyLong_FromLong(tstate->interp->dlopenflags);
}
PyDoc_STRVAR(getdlopenflags_doc,
"getdlopenflags() -> int\n\
\n\
Return the current value of the flags that are used for dlopen calls.\n\
The flag constants are defined in the ctypes and DLFCN modules.");
#endif /* HAVE_DLOPEN */
#ifdef USE_MALLOPT
/* Link with -lmalloc (or -lmpc) on an SGI */
#include <malloc.h>
static PyObject *
sys_mdebug(PyObject *self, PyObject *args)
{
int flag;
if (!PyArg_ParseTuple(args, "i:mdebug", &flag))
return NULL;
mallopt(M_DEBUG, flag);
Py_INCREF(Py_None);
return Py_None;
}
#endif /* USE_MALLOPT */
static PyObject *
sys_getsizeof(PyObject *self, PyObject *args, PyObject *kwds)
{
PyObject *res = NULL;
static PyObject *gc_head_size = NULL;
static char *kwlist[] = {"object", "default", 0};
PyObject *o, *dflt = NULL;
PyObject *method;
_Py_IDENTIFIER(__sizeof__);
if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|O:getsizeof",
kwlist, &o, &dflt))
return NULL;
/* Initialize static variable for GC head size */
if (gc_head_size == NULL) {
gc_head_size = PyLong_FromSsize_t(sizeof(PyGC_Head));
if (gc_head_size == NULL)
return NULL;
}
/* Make sure the type is initialized. float gets initialized late */
if (PyType_Ready(Py_TYPE(o)) < 0)
return NULL;
method = _PyObject_LookupSpecial(o, &PyId___sizeof__);
if (method == NULL) {
if (!PyErr_Occurred())
PyErr_Format(PyExc_TypeError,
"Type %.100s doesn't define __sizeof__",
Py_TYPE(o)->tp_name);
}
else {
res = PyObject_CallFunctionObjArgs(method, NULL);
Py_DECREF(method);
}
/* Has a default value been given */
if ((res == NULL) && (dflt != NULL) &&
PyErr_ExceptionMatches(PyExc_TypeError))
{
PyErr_Clear();
Py_INCREF(dflt);
return dflt;
}
else if (res == NULL)
return res;
/* add gc_head size */
if (PyObject_IS_GC(o)) {
PyObject *tmp = res;
res = PyNumber_Add(tmp, gc_head_size);
Py_DECREF(tmp);
}
return res;
}
PyDoc_STRVAR(getsizeof_doc,
"getsizeof(object, default) -> int\n\
\n\
Return the size of object in bytes.");
static PyObject *
sys_getrefcount(PyObject *self, PyObject *arg)
{
return PyLong_FromSsize_t(arg->ob_refcnt);
}
#ifdef Py_REF_DEBUG
static PyObject *
sys_gettotalrefcount(PyObject *self)
{
return PyLong_FromSsize_t(_Py_GetRefTotal());
}
#endif /* Py_REF_DEBUG */
PyDoc_STRVAR(getrefcount_doc,
"getrefcount(object) -> integer\n\
\n\
Return the reference count of object. The count returned is generally\n\
one higher than you might expect, because it includes the (temporary)\n\
reference as an argument to getrefcount()."
);
#ifdef COUNT_ALLOCS
static PyObject *
sys_getcounts(PyObject *self)
{
extern PyObject *get_counts(void);
return get_counts();
}
#endif
PyDoc_STRVAR(getframe_doc,
"_getframe([depth]) -> frameobject\n\
\n\
Return a frame object from the call stack. If optional integer depth is\n\
given, return the frame object that many calls below the top of the stack.\n\
If that is deeper than the call stack, ValueError is raised. The default\n\
for depth is zero, returning the frame at the top of the call stack.\n\
\n\
This function should be used for internal and specialized\n\
purposes only."
);
static PyObject *
sys_getframe(PyObject *self, PyObject *args)
{
PyFrameObject *f = PyThreadState_GET()->frame;
int depth = -1;
if (!PyArg_ParseTuple(args, "|i:_getframe", &depth))
return NULL;
while (depth > 0 && f != NULL) {
f = f->f_back;
--depth;
}
if (f == NULL) {
PyErr_SetString(PyExc_ValueError,
"call stack is not deep enough");
return NULL;
}
Py_INCREF(f);
return (PyObject*)f;
}
PyDoc_STRVAR(current_frames_doc,
"_current_frames() -> dictionary\n\
\n\
Return a dictionary mapping each current thread T's thread id to T's\n\
current stack frame.\n\
\n\
This function should be used for specialized purposes only."
);
static PyObject *
sys_current_frames(PyObject *self, PyObject *noargs)
{
return _PyThread_CurrentFrames();
}
PyDoc_STRVAR(call_tracing_doc,
"call_tracing(func, args) -> object\n\
\n\
Call func(*args), while tracing is enabled. The tracing state is\n\
saved, and restored afterwards. This is intended to be called from\n\
a debugger from a checkpoint, to recursively debug some other code."
);
static PyObject *
sys_call_tracing(PyObject *self, PyObject *args)
{
PyObject *func, *funcargs;
if (!PyArg_ParseTuple(args, "OO!:call_tracing", &func, &PyTuple_Type, &funcargs))
return NULL;
return _PyEval_CallTracing(func, funcargs);
}
PyDoc_STRVAR(callstats_doc,
"callstats() -> tuple of integers\n\
\n\
Return a tuple of function call statistics, if CALL_PROFILE was defined\n\
when Python was built. Otherwise, return None.\n\
\n\
When enabled, this function returns detailed, implementation-specific\n\
details about the number of function calls executed. The return value is\n\
a 11-tuple where the entries in the tuple are counts of:\n\
0. all function calls\n\
1. calls to PyFunction_Type objects\n\
2. PyFunction calls that do not create an argument tuple\n\
3. PyFunction calls that do not create an argument tuple\n\
and bypass PyEval_EvalCodeEx()\n\
4. PyMethod calls\n\
5. PyMethod calls on bound methods\n\
6. PyType calls\n\
7. PyCFunction calls\n\
8. generator calls\n\
9. All other calls\n\
10. Number of stack pops performed by call_function()"
);
#ifdef __cplusplus
extern "C" {
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