forked from RustPython/RustPython
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathwarn.rs
More file actions
415 lines (371 loc) · 11.6 KB
/
warn.rs
File metadata and controls
415 lines (371 loc) · 11.6 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
use crate::{
builtins::{
PyDict, PyDictRef, PyListRef, PyStr, PyStrInterned, PyStrRef, PyTuple, PyTupleRef,
PyTypeRef,
},
convert::{IntoObject, TryFromObject},
types::PyComparisonOp,
AsObject, Context, Py, PyObjectRef, PyResult, VirtualMachine,
};
pub struct WarningsState {
filters: PyListRef,
_once_registry: PyDictRef,
default_action: PyStrRef,
filters_version: usize,
}
impl WarningsState {
fn create_filter(ctx: &Context) -> PyListRef {
ctx.new_list(vec![ctx
.new_tuple(vec![
ctx.new_str("__main__").into(),
ctx.types.none_type.as_object().to_owned(),
ctx.exceptions.warning.as_object().to_owned(),
ctx.new_str("ACTION").into(),
ctx.new_int(0).into(),
])
.into()])
}
pub fn init_state(ctx: &Context) -> WarningsState {
WarningsState {
filters: Self::create_filter(ctx),
_once_registry: PyDict::new_ref(ctx),
default_action: ctx.new_str("default"),
filters_version: 0,
}
}
}
fn check_matched(obj: &PyObjectRef, arg: &PyObjectRef, vm: &VirtualMachine) -> PyResult<bool> {
if obj.class().is(vm.ctx.types.none_type) {
return Ok(true);
}
if obj.rich_compare_bool(arg, PyComparisonOp::Eq, vm)? {
return Ok(false);
}
let result = obj.call((arg.to_owned(),), vm);
Ok(result.is_ok())
}
fn get_warnings_attr(
vm: &VirtualMachine,
attr_name: &'static PyStrInterned,
try_import: bool,
) -> PyResult<Option<PyObjectRef>> {
let module = if try_import
&& !vm
.state
.finalizing
.load(std::sync::atomic::Ordering::SeqCst)
{
match vm.import("warnings", 0) {
Ok(module) => module,
Err(_) => return Ok(None),
}
} else {
// TODO: finalizing support
return Ok(None);
};
Ok(Some(module.get_attr(attr_name, vm)?))
}
pub fn warn(
message: PyStrRef,
category: Option<PyTypeRef>,
stack_level: isize,
source: Option<PyObjectRef>,
vm: &VirtualMachine,
) -> PyResult<()> {
let (filename, lineno, module, registry) = setup_context(stack_level, vm)?;
warn_explicit(
category, message, filename, lineno, module, registry, None, source, vm,
)
}
fn get_default_action(vm: &VirtualMachine) -> PyResult<PyObjectRef> {
Ok(vm.state.warnings.default_action.clone().into())
// .map_err(|_| {
// vm.new_value_error(format!(
// "_warnings.defaultaction must be a string, not '{}'",
// vm.state.warnings.default_action
// ))
// })
}
fn get_filter(
category: PyObjectRef,
text: PyObjectRef,
lineno: usize,
module: PyObjectRef,
mut _item: PyTupleRef,
vm: &VirtualMachine,
) -> PyResult {
let filters = vm.state.warnings.filters.as_object().to_owned();
let filters: PyListRef = filters
.try_into_value(vm)
.map_err(|_| vm.new_value_error("_warnings.filters must be a list".to_string()))?;
/* WarningsState.filters could change while we are iterating over it. */
for i in 0..filters.borrow_vec().len() {
let tmp_item = if let Some(tmp_item) = filters.borrow_vec().get(i).cloned() {
let tmp_item = PyTupleRef::try_from_object(vm, tmp_item)?;
(tmp_item.len() == 5).then_some(tmp_item)
} else {
None
}
.ok_or_else(|| vm.new_value_error(format!("_warnings.filters item {i} isn't a 5-tuple")))?;
/* Python code: action, msg, cat, mod, ln = item */
let action = if let Some(action) = tmp_item.first() {
action.str(vm).map(|action| action.into_object())
} else {
Err(vm.new_type_error("action must be a string".to_string()))
};
let good_msg = if let Some(msg) = tmp_item.get(1) {
check_matched(msg, &text, vm)?
} else {
false
};
let is_subclass = if let Some(cat) = tmp_item.get(2) {
category.fast_isinstance(cat.class())
} else {
false
};
let good_mod = if let Some(item_mod) = tmp_item.get(3) {
check_matched(item_mod, &module, vm)?
} else {
false
};
let ln = tmp_item.get(4).map_or(0, |ln_obj| {
ln_obj.try_int(vm).map_or(0, |ln| ln.as_u32_mask() as _)
});
if good_msg && good_mod && is_subclass && (ln == 0 || lineno == ln) {
_item = tmp_item;
return action;
}
}
get_default_action(vm)
}
fn already_warned(
registry: PyObjectRef,
key: PyObjectRef,
should_set: bool,
vm: &VirtualMachine,
) -> PyResult<bool> {
let version_obj = registry.get_item(identifier!(&vm.ctx, version), vm).ok();
let filters_version = vm.ctx.new_int(vm.state.warnings.filters_version).into();
match version_obj {
Some(version_obj)
if version_obj.try_int(vm).is_ok() || version_obj.is(&filters_version) =>
{
let already_warned = registry.get_item(key.as_ref(), vm)?;
if already_warned.is_true(vm)? {
return Ok(true);
}
}
_ => {
let registry = registry.dict();
if let Some(registry) = registry.as_ref() {
registry.clear();
let r = registry.set_item("version", filters_version, vm);
if r.is_err() {
return Ok(false);
}
}
}
}
/* This warning wasn't found in the registry, set it. */
if !should_set {
return Ok(false);
}
let item = vm.ctx.true_value.clone().into();
let _ = registry.set_item(key.as_ref(), item, vm); // ignore set error
Ok(true)
}
fn normalize_module(filename: &Py<PyStr>, vm: &VirtualMachine) -> Option<PyObjectRef> {
let obj = match filename.char_len() {
0 => vm.new_pyobj("<unknown>"),
len if len >= 3 && filename.as_str().ends_with(".py") => {
vm.new_pyobj(&filename.as_str()[..len - 3])
}
_ => filename.as_object().to_owned(),
};
Some(obj)
}
#[allow(clippy::too_many_arguments)]
fn warn_explicit(
category: Option<PyTypeRef>,
message: PyStrRef,
filename: PyStrRef,
lineno: usize,
module: Option<PyObjectRef>,
registry: PyObjectRef,
source_line: Option<PyObjectRef>,
source: Option<PyObjectRef>,
vm: &VirtualMachine,
) -> PyResult<()> {
let registry: PyObjectRef = registry
.try_into_value(vm)
.map_err(|_| vm.new_type_error("'registry' must be a dict or None".to_owned()))?;
// Normalize module.
let module = match module.or_else(|| normalize_module(&filename, vm)) {
Some(module) => module,
None => return Ok(()),
};
// Normalize message.
let text = message.as_str();
let category = if let Some(category) = category {
if !category.fast_issubclass(vm.ctx.exceptions.warning) {
return Err(vm.new_type_error(format!(
"category must be a Warning subclass, not '{}'",
category.class().name()
)));
}
category
} else {
vm.ctx.exceptions.user_warning.to_owned()
};
let category = if message.fast_isinstance(vm.ctx.exceptions.warning) {
message.class().to_owned()
} else {
category
};
// Create key.
let key = PyTuple::new_ref(
vec![
vm.ctx.new_int(3).into(),
vm.ctx.new_str(text).into(),
category.as_object().to_owned(),
vm.ctx.new_int(lineno).into(),
],
&vm.ctx,
);
if !vm.is_none(registry.as_object()) && already_warned(registry, key.into_object(), false, vm)?
{
return Ok(());
}
let item = vm.ctx.new_tuple(vec![]);
let action = get_filter(
category.as_object().to_owned(),
vm.ctx.new_str(text).into(),
lineno,
module,
item,
vm,
)?;
if action.str(vm)?.as_str().eq("error") {
return Err(vm.new_type_error(message.to_string()));
}
if action.str(vm)?.as_str().eq("ignore") {
return Ok(());
}
call_show_warning(
// t_state,
category,
message,
filename,
lineno, // lineno_obj,
source_line,
source,
vm,
)
}
fn call_show_warning(
category: PyTypeRef,
message: PyStrRef,
filename: PyStrRef,
lineno: usize,
source_line: Option<PyObjectRef>,
source: Option<PyObjectRef>,
vm: &VirtualMachine,
) -> PyResult<()> {
let Some(show_fn) =
get_warnings_attr(vm, identifier!(&vm.ctx, _showwarnmsg), source.is_some())?
else {
return show_warning(filename, lineno, message, category, source_line, vm);
};
if !show_fn.is_callable() {
return Err(
vm.new_type_error("warnings._showwarnmsg() must be set to a callable".to_owned())
);
}
let Some(warnmsg_cls) = get_warnings_attr(vm, identifier!(&vm.ctx, WarningMessage), false)?
else {
return Err(vm.new_type_error("unable to get warnings.WarningMessage".to_owned()));
};
let msg = warnmsg_cls.call(
vec![
message.into(),
category.into(),
filename.into(),
vm.new_pyobj(lineno),
vm.ctx.none(),
vm.ctx.none(),
vm.unwrap_or_none(source),
],
vm,
)?;
show_fn.call((msg,), vm)?;
Ok(())
}
fn show_warning(
_filename: PyStrRef,
_lineno: usize,
text: PyStrRef,
category: PyTypeRef,
_source_line: Option<PyObjectRef>,
vm: &VirtualMachine,
) -> PyResult<()> {
let stderr = crate::stdlib::sys::PyStderr(vm);
writeln!(stderr, "{}: {}", category.name(), text.as_str(),);
Ok(())
}
/// filename, module, and registry are new refs, globals is borrowed
/// Returns `Ok` on success, or `Err` on error (no new refs)
fn setup_context(
mut stack_level: isize,
vm: &VirtualMachine,
) -> PyResult<
// filename, lineno, module, registry
(PyStrRef, usize, Option<PyObjectRef>, PyObjectRef),
> {
let __warningregistry__ = "__warningregistry__";
let __name__ = "__name__";
let mut f = vm.current_frame().as_deref().cloned();
// Stack level comparisons to Python code is off by one as there is no
// warnings-related stack level to avoid.
if stack_level <= 0 || f.as_ref().map_or(false, |frame| frame.is_internal_frame()) {
loop {
stack_level -= 1;
if stack_level <= 0 {
break;
}
if let Some(tmp) = f {
f = tmp.f_back(vm);
} else {
break;
}
}
} else {
loop {
stack_level -= 1;
if stack_level <= 0 {
break;
}
if let Some(tmp) = f {
f = tmp.next_external_frame(vm);
} else {
break;
}
}
}
let (globals, filename, lineno) = if let Some(f) = f {
(f.globals.clone(), f.code.source_path, f.f_lineno())
} else {
(vm.current_globals().clone(), vm.ctx.intern_str("sys"), 1)
};
let registry = if let Ok(registry) = globals.get_item(__warningregistry__, vm) {
registry
} else {
let registry = PyDict::new_ref(&vm.ctx);
globals.set_item(__warningregistry__, registry.clone().into(), vm)?;
registry.into()
};
// Setup module.
let module = globals
.get_item(__name__, vm)
.unwrap_or_else(|_| vm.new_pyobj("<string>"));
Ok((filename.to_owned(), lineno, Some(module), registry))
}