RustPython/crates/stdlib/src/_opcode.rs at main · RustPython/RustPython · GitHub

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pub(crate) use _opcode::module_def;

#[pymodule]

mod _opcode {

use crate::vm::{

AsObject, PyObjectRef, PyResult, VirtualMachine,

builtins::{PyInt, PyIntRef},

bytecode::{AnyOpcode, oparg},

};

fn try_from_i32(raw: i32) -> Result<AnyOpcode, ()> {

u16::try_from(raw)

.map_err(|_| ())?

.try_into()

.map_err(|_| ())

}

// prepare specialization

#[pyattr]

const ENABLE_SPECIALIZATION: i8 = 1;

#[pyattr]

const ENABLE_SPECIALIZATION_FT: i8 = 1;

#[derive(FromArgs)]

struct StackEffectArgs {

#[pyarg(positional)]

opcode: PyIntRef,

#[pyarg(positional, optional)]

oparg: Option<PyObjectRef>,

#[pyarg(named, optional)]

jump: Option<PyObjectRef>,

}

#[pyfunction]

fn stack_effect(args: StackEffectArgs, vm: &VirtualMachine) -> PyResult<i32> {

let oparg = args.oparg.map_or(Ok(0), |v| {

if !v.fast_isinstance(vm.ctx.types.int_type) {

return Err(vm.new_type_error(format!(

"'{}' object cannot be interpreted as an integer",

v.class().name()

)));

}

v.downcast_ref::<PyInt>()

.ok_or_else(|| {

vm.new_type_error(format!(

"'{}' object cannot be interpreted as an integer",

v.class().name()

))

})?

.try_to_primitive::<u32>(vm)

})?;

let jump: Option<bool> = match args.jump {

Some(v) => {

if vm.is_none(&v) {

None

} else {

Some(v.try_to_bool(vm).map_err(|_| {

vm.new_value_error("stack_effect: jump must be False, True or None")

})?)

}

None => None,

};

let instr = args

.opcode

.try_to_primitive::<u16>(vm)

.and_then(|v| {

AnyOpcode::try_from(v)

.map_err(|_| vm.new_exception_empty(vm.ctx.exceptions.value_error.to_owned()))

})

.map_err(|_| vm.new_value_error("invalid opcode or oparg"))?;

// Raise ValueError if specialized.

if instr.real().is_some_and(|op| op.deopt().is_some()) {

return Err(vm.new_value_error("invalid opcode or oparg"));

}

let effect = match jump {

Some(true) => instr.stack_effect_jump(oparg),

Some(false) => instr.stack_effect(oparg),

// jump=None: max of both paths (CPython convention)

None => instr

.stack_effect(oparg)

.max(instr.stack_effect_jump(oparg)),

};

Ok(effect)

}

#[pyfunction]

fn is_valid(opcode: i32) -> bool {

try_from_i32(opcode).is_ok()

}

#[pyfunction]

fn has_arg(opcode: i32) -> bool {

try_from_i32(opcode).is_ok_and(|op| op.has_arg())

}

#[pyfunction]

fn has_const(opcode: i32) -> bool {

try_from_i32(opcode).is_ok_and(|op| op.has_const())

}

#[pyfunction]

fn has_name(opcode: i32) -> bool {

try_from_i32(opcode).is_ok_and(|op| op.has_name())

}

#[pyfunction]

fn has_jump(opcode: i32) -> bool {

try_from_i32(opcode).is_ok_and(|op| op.has_jump())

}

#[pyfunction]

fn has_free(opcode: i32) -> bool {

try_from_i32(opcode).is_ok_and(|op| op.has_free())

}

#[pyfunction]

fn has_local(opcode: i32) -> bool {

try_from_i32(opcode).is_ok_and(|op| op.has_local())

}

#[pyfunction]

fn has_exc(opcode: i32) -> bool {

try_from_i32(opcode).is_ok_and(|op| op.is_block_push())

}

#[pyfunction]

fn get_intrinsic1_descs(vm: &VirtualMachine) -> Vec<PyObjectRef> {

oparg::IntrinsicFunction1::iter()

.map(|x| vm.ctx.new_str(x.desc()).into())

.collect()

}

#[pyfunction]

fn get_intrinsic2_descs(vm: &VirtualMachine) -> Vec<PyObjectRef> {

oparg::IntrinsicFunction2::iter()

.map(|x| vm.ctx.new_str(x.desc()).into())

.collect()

}

#[pyfunction]

fn get_nb_ops(vm: &VirtualMachine) -> Vec<PyObjectRef> {

oparg::BinaryOperator::iter()

.map(|x| {

vm.ctx

.new_tuple(vec![

vm.ctx.new_str(x.desc()).into(),

vm.ctx.new_str(x.to_string()).into(),

])

.into()

})

.collect()

}

#[pyfunction]

fn get_special_method_names(vm: &VirtualMachine) -> Vec<PyObjectRef> {

oparg::SpecialMethod::iter()

.map(|x| vm.ctx.new_str(x.to_string()).into())

.collect()

}

#[pyfunction]

fn get_executor(_code: PyObjectRef, _offset: i32, vm: &VirtualMachine) -> PyObjectRef {

// TODO

vm.ctx.none()

}

#[pyfunction]

fn get_specialization_stats(vm: &VirtualMachine) -> PyObjectRef {

vm.ctx.none()

}

#[cfg(test)]

mod tests {

use crate::vm::{self, compiler::Mode};

macro_rules! assert_dis_snapshot {

($value:expr) => {

insta::assert_snapshot!(dis($value))

};

}

/// Returns the [`dis.dis`](https://docs.python.org/3/library/dis.html#dis.dis) output.

///

/// # Notes

///

/// Memory addresses in the output are replaced with `0xdeadbeef` for consistency.

fn dis(source: &str) -> String {

const FNAME: &str = "<?>";

let builder = vm::Interpreter::builder(Default::default());

let stdlib_defs = crate::stdlib_module_defs(&builder.ctx);

let interp = builder

.add_native_modules(&stdlib_defs)

.add_frozen_modules(rustpython_pylib::FROZEN_STDLIB)

.build();

interp.enter(|vm| {

let scope = vm.new_scope_with_builtins();

let code_obj = vm

.compile(source.trim(), Mode::Exec, FNAME)

.map_err(|err| err.into_pyexception(vm, Some(source)))

.unwrap();

scope.globals.set_item("code", code_obj.into(), vm).unwrap();

let py_source = r#"

import dis

import io

import re

import sys

old_stdout = sys.stdout

sys.stdout = buf = io.StringIO()

dis.dis(code)

sys.stdout = old_stdout

tmp_output = buf.getvalue()

# constant mem address

output = re.sub(r'(<code object \w+ at )0x[0-9a-fA-F]+', r'\g<1>0xdeadbeef', tmp_output)

"#;

let py_code_obj = vm

.compile(py_source, Mode::Exec, FNAME)

.map_err(|err| err.into_pyexception(vm, Some(py_source)))

.unwrap();

vm.run_code_obj(py_code_obj, scope.clone()).unwrap();

let py_output = scope.globals.get_item("output", vm).unwrap();

py_output.str(vm).unwrap().to_string()

})

}

#[test]

fn if_ors() {

assert_dis_snapshot!(

r#"

if True or False or False:

pass

)

}

#[test]

fn if_ands() {

assert_dis_snapshot!(

r#"

if True and False and False:

pass

)

}

#[test]

fn if_mixed() {

assert_dis_snapshot!(

r#"

if (True and False) or (False and True):

pass

)

}

#[test]

fn nested_bool_op() {

assert_dis_snapshot!(

r#"

x = Test() and False or False

)

}

#[test]

fn const_no_op() {

assert_dis_snapshot!(

r#"

x = not True

)

}

#[test]

fn constant_true_if_pass_keeps_line_anchor_nop() {

assert_dis_snapshot!(

r#"

if 1:

pass

)

}

#[test]

fn nested_double_async_with() {

assert_dis_snapshot!(

r#"

async def test():

for stop_exc in (StopIteration('spam'), StopAsyncIteration('ham')):

with self.subTest(type=type(stop_exc)):

try:

async with egg():

raise stop_exc

except Exception as ex:

self.assertIs(ex, stop_exc)

else:

self.fail(f'{stop_exc} was suppressed')

)

}

#[test]

fn bare_function_annotations_check_attribute_and_subscript_expressions() {

assert_dis_snapshot!(

r#"

def f(one: int):

int.new_attr: int

[list][0].new_attr: [int, str]

my_lst = [1]

my_lst[one]: int

return my_lst

)

}

RustPython/crates/stdlib/src/_opcode.rs at main · RustPython/RustPython · GitHub

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