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sysmodule.rs
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use std::rc::Rc;
use std::{env, mem};
use crate::frame::FrameRef;
use crate::function::{OptionalArg, PyFuncArgs};
use crate::obj::objstr::PyStringRef;
use crate::pyobject::{
IntoPyObject, ItemProtocol, PyClassImpl, PyContext, PyObjectRef, PyResult, TypeProtocol,
};
use crate::version;
use crate::vm::{PySettings, VirtualMachine};
/*
* The magic sys module.
*/
fn argv(vm: &VirtualMachine) -> PyObjectRef {
vm.ctx.new_list(
vm.settings
.argv
.iter()
.map(|arg| vm.new_str(arg.to_owned()))
.collect(),
)
}
fn executable(ctx: &PyContext) -> PyObjectRef {
if let Some(arg) = env::args().next() {
ctx.new_str(arg)
} else {
ctx.none()
}
}
fn getframe(offset: OptionalArg<usize>, vm: &VirtualMachine) -> PyResult<FrameRef> {
let offset = offset.into_option().unwrap_or(0);
if offset > vm.frames.borrow().len() - 1 {
return Err(vm.new_value_error("call stack is not deep enough".to_string()));
}
let idx = vm.frames.borrow().len() - offset - 1;
let frame = &vm.frames.borrow()[idx];
Ok(frame.clone())
}
/// sys.flags
///
/// Flags provided through command line arguments or environment vars.
#[pystruct_sequence(name = "flags")]
#[derive(Default, Debug)]
struct SysFlags {
/// -d
debug: bool,
/// -i
inspect: bool,
/// -i
interactive: bool,
/// -O or -OO
optimize: u8,
/// -B
dont_write_bytecode: bool,
/// -s
no_user_site: bool,
/// -S
no_site: bool,
/// -E
ignore_environment: bool,
/// -v
verbose: u8,
/// -b
bytes_warning: bool,
/// -q
quiet: bool,
/// -R
hash_randomization: bool,
/// -I
isolated: bool,
/// -X dev
dev_mode: bool,
/// -X utf8
utf8_mode: bool,
}
impl SysFlags {
fn from_settings(settings: &PySettings) -> Self {
// Start with sensible defaults:
let mut flags: SysFlags = Default::default();
flags.debug = settings.debug;
flags.inspect = settings.inspect;
flags.optimize = settings.optimize;
flags.no_user_site = settings.no_user_site;
flags.no_site = settings.no_site;
flags.ignore_environment = settings.ignore_environment;
flags.verbose = settings.verbose;
flags.quiet = settings.quiet;
flags.dont_write_bytecode = settings.dont_write_bytecode;
flags
}
}
fn sys_getrefcount(vm: &VirtualMachine, args: PyFuncArgs) -> PyResult {
arg_check!(vm, args, required = [(object, None)]);
let size = Rc::strong_count(&object);
Ok(vm.ctx.new_int(size))
}
fn sys_getsizeof(vm: &VirtualMachine, args: PyFuncArgs) -> PyResult {
arg_check!(vm, args, required = [(object, None)]);
// TODO: implement default optional argument.
let siz
7440
e = mem::size_of_val(&object);
Ok(vm.ctx.new_int(size))
}
fn sys_getfilesystemencoding(_vm: &VirtualMachine) -> String {
// TODO: implmement non-utf-8 mode.
"utf-8".to_string()
}
#[cfg(not(windows))]
fn sys_getfilesystemencodeerrors(_vm: &VirtualMachine) -> String {
"surrogateescape".to_string()
}
#[cfg(windows)]
fn sys_getfilesystemencodeerrors(_vm: &VirtualMachine) -> String {
"surrogatepass".to_string()
}
fn sys_getprofile(vm: &VirtualMachine) -> PyObjectRef {
vm.profile_func.borrow().clone()
}
fn sys_setprofile(profilefunc: PyObjectRef, vm: &VirtualMachine) {
vm.profile_func.replace(profilefunc);
update_use_tracing(vm);
}
fn sys_gettrace(vm: &VirtualMachine) -> PyObjectRef {
vm.trace_func.borrow().clone()
}
fn sys_settrace(tracefunc: PyObjectRef, vm: &VirtualMachine) -> PyObjectRef {
vm.trace_func.replace(tracefunc);
update_use_tracing(vm);
vm.ctx.none()
}
fn update_use_tracing(vm: &VirtualMachine) {
let trace_is_none = vm.is_none(&vm.trace_func.borrow());
let profile_is_none = vm.is_none(&vm.profile_func.borrow());
let tracing = !(trace_is_none && profile_is_none);
vm.use_tracing.replace(tracing);
}
// TODO implement string interning, this will be key for performance
fn sys_intern(value: PyStringRef, _vm: &VirtualMachine) -> PyStringRef {
value
}
fn sys_exc_info(vm: &VirtualMachine) -> PyResult {
Ok(vm.ctx.new_tuple(match vm.current_exception() {
Some(exception) => vec![
exception.class().into_object(),
exception.clone(),
vm.get_none(),
],
None => vec![vm.get_none(), vm.get_none(), vm.get_none()],
}))
}
// TODO: raise a SystemExit here
fn sys_exit(code: OptionalArg<i32>, _vm: &VirtualMachine) -> PyResult<()> {
let code = code.unwrap_or(0);
std::process::exit(code)
}
#[pystruct_sequence(name = "version_info")]
#[derive(Default, Debug)]
struct VersionInfo {
major: usize,
minor: usize,
micro: usize,
releaselevel: String,
serial: usize,
}
pub fn make_module(vm: &VirtualMachine, module: PyObjectRef, builtins: PyObjectRef) {
let ctx = &vm.ctx;
let flags_type = SysFlags::make_class(ctx);
let flags = SysFlags::from_settings(&vm.settings)
.into_struct_sequence(vm, flags_type)
.unwrap();
let version_info_type = VersionInfo::make_class(ctx);
let version_info = VersionInfo {
major: env!("CARGO_PKG_VERSION_MAJOR").parse().unwrap(),
minor: env!("CARGO_PKG_VERSION_MINOR").parse().unwrap(),
micro: env!("CARGO_PKG_VERSION_PATCH").parse().unwrap(),
releaselevel: "alpha".to_owned(),
serial: 0,
}
.into_struct_sequence(vm, version_info_type)
.unwrap();
// TODO Add crate version to this namespace
let implementation = py_namespace!(vm, {
"name" => ctx.new_str("RustPython".to_string()),
"cache_tag" => ctx.new_str("rustpython-01".to_string()),
});
let path = ctx.new_list(
vm.settings
.path_list
.iter()
.map(|path| ctx.new_str(path.clone()))
.collect(),
);
let platform = if cfg!(target_os = "linux") {
"linux".to_string()
} else if cfg!(target_os = "macos") {
"darwin".to_string()
} else if cfg!(target_os = "windows") {
"win32".to_string()
} else if cfg!(target_os = "android") {
// Linux as well. see https://
8000
bugs.python.org/issue32637
"linux".to_string()
} else {
"unknown".to_string()
};
// https://doc.rust-lang.org/reference/conditional-compilation.html#target_endian
let bytorder = if cfg!(target_endian = "little") {
"little".to_string()
} else if cfg!(target_endian = "big") {
"big".to_string()
} else {
"unknown".to_string()
};
let copyright = "Copyright (c) 2019 RustPython Team";
let sys_doc = "This module provides access to some objects used or maintained by the
interpreter and to functions that interact strongly with the interpreter.
Dynamic objects:
argv -- command line arguments; argv[0] is the script pathname if known
path -- module search path; path[0] is the script directory, else ''
modules -- dictionary of loaded modules
displayhook -- called to show results in an interactive session
excepthook -- called to handle any uncaught exception other than SystemExit
To customize printing in an interactive session or to install a custom
top-level exception handler, assign other functions to replace these.
stdin -- standard input file object; used by input()
stdout -- standard output file object; used by print()
stderr -- standard error object; used for error messages
By assigning other file objects (or objects that behave like files)
to these, it is possible to redirect all of the interpreter's I/O.
last_type -- type of last uncaught exception
last_value -- value of last uncaught exception
last_traceback -- traceback of last uncaught exception
These three are only available in an interactive session after a
traceback has been printed.
Static objects:
builtin_module_names -- tuple of module names built into this interpreter
copyright -- copyright notice pertaining to this interpreter
exec_prefix -- prefix used to find the machine-specific Python library
executable -- absolute path of the executable binary of the Python interpreter
float_info -- a struct sequence with information about the float implementation.
float_repr_style -- string indicating the style of repr() output for floats
hash_info -- a struct sequence with information about the hash algorithm.
hexversion -- version information encoded as a single integer
implementation -- Python implementation information.
int_info -- a struct sequence with information about the int implementation.
maxsize -- the largest supported length of containers.
maxunicode -- the value of the largest Unicode code point
platform -- platform identifier
prefix -- prefix used to find the Python library
thread_info -- a struct sequence with information about the thread implementation.
version -- the version of this interpreter as a string
version_info -- version information as a named tuple
__stdin__ -- the original stdin; don't touch!
__stdout__ -- the original stdout; don't touch!
__stderr__ -- the original stderr; don't touch!
__displayhook__ -- the original displayhook; don't touch!
__excepthook__ -- the original excepthook; don't touch!
Functions:
displayhook() -- print an object to the screen, and save it in builtins._
excepthook() -- print an exception and its traceback to sys.stderr
exc_info() -- return thread-safe information about the current exception
exit() -- exit the interpreter by raising SystemExit
getdlopenflags() -- returns flags to be used for dlopen() calls
getprofile() -- get the global profiling function
getrefcount() -- return the reference count for an object (plus one :-)
getrecursionlimit() -- return the max recursion depth for the interpreter
getsizeof() -- return the size of an object in bytes
gettrace() -- get the global debug tracing function
setcheckinterval() -- control how often the interpreter checks for events
setdlopenflags() -- set the flags to be used for dlopen() calls
setprofile() -- set the global profiling function
setrecursionlimit() -- set the max recursion depth for the interpreter
settrace() -- set the global debug tracing function
";
let mut module_names: Vec<String> = vm.stdlib_inits.borrow().keys().cloned().collect();
module_names.push("sys".to_string());
module_names.push("builtins".to_string());
module_names.sort();
let builtin_module_names = ctx.new_tuple(
module_names
.iter()
.map(|v| v.into_pyobject(vm).unwrap())
.collect(),
);
let modules = ctx.new_dict();
let prefix = option_env!("RUSTPYTHON_PREFIX").unwrap_or("/usr/local");
let base_prefix = option_env!("RUSTPYTHON_BASEPREFIX").unwrap_or(prefix);
let exec_prefix = option_env!("RUSTPYTHON_EXECPREFIX").unwrap_or(prefix);
extend_module!(vm, module, {
"__name__" => ctx.new_str(String::from("sys")),
"argv" => argv(vm),
"builtin_module_names" => builtin_module_names,
"byteorder" => ctx.new_str(bytorder),
"copyright" => ctx.new_str(copyright.to_string()),
"executable" => executable(ctx),
"flags" => flags,
"getrefcount" => ctx.new_rustfunc(sys_getrefcount),
"getsizeof" => ctx.new_rustfunc(sys_getsizeof),
"implementation" => implementation,
"getfilesystemencoding" => ctx.new_rustfunc(sys_getfilesystemencoding),
"getfilesystemencodeerrors" => ctx.new_rustfunc(sys_getfilesystemencodeerrors),
"getprofile" => ctx.new_rustfunc(sys_getprofile),
"gettrace" => ctx.new_rustfunc(sys_gettrace),
"intern" => ctx.new_rustfunc(sys_intern),
"maxunicode" => ctx.new_int(0x0010_FFFF),
"maxsize" => ctx.new_int(std::isize::MAX),
"path" => path,
"ps1" => ctx.new_str(">>>>> ".to_string()),
"ps2" => ctx.new_str("..... ".to_string()),
"__doc__" => ctx.new_str(sys_doc.to_string()),
"_getframe" => ctx.new_rustfunc(getframe),
"modules" => modules.clone(),
"warnoptions" => ctx.new_list(vec![]),
"platform" => ctx.new_str(platform),
"meta_path" => ctx.new_list(vec![]),
"path_hooks" => ctx.new_list(vec![]),
"path_importer_cache" => ctx.new_dict(),
"pycache_prefix" => vm.get_none(),
"dont_write_bytecode" => vm.new_bool(vm.settings.dont_write_bytecode),
"setprofile" => ctx.new_rustfunc(sys_setprofile),
"settrace" => ctx.new_rustfunc(sys_settrace),
"version" => vm.new_str(version::get_version()),
"version_info" => version_info,
"exc_info" => ctx.new_rustfunc(sys_exc_info),
"prefix" => ctx.new_str(prefix.to_string()),
"base_prefix" => ctx.new_str(base_prefix.to_string()),
"exec_prefix" => ctx.new_str(exec_prefix.to_string()),
"exit" => ctx.new_rustfunc(sys_exit),
});
modules.set_item("sys", module.clone(), vm).unwrap();
modules.set_item("builtins", builtins.clone(), vm).unwrap();
}