1 | use crate::common::{DebugArangesOffset, DebugInfoOffset, Encoding, SectionId}; |
2 | use crate::endianity::Endianity; |
3 | use crate::read::{ |
4 | EndianSlice, Error, Range, Reader, ReaderAddress, ReaderOffset, Result, Section, |
5 | }; |
6 | |
7 | /// The `DebugAranges` struct represents the DWARF address range information |
8 | /// found in the `.debug_aranges` section. |
9 | #[derive (Debug, Default, Clone, Copy)] |
10 | pub struct DebugAranges<R> { |
11 | section: R, |
12 | } |
13 | |
14 | impl<'input, Endian> DebugAranges<EndianSlice<'input, Endian>> |
15 | where |
16 | Endian: Endianity, |
17 | { |
18 | /// Construct a new `DebugAranges` instance from the data in the `.debug_aranges` |
19 | /// section. |
20 | /// |
21 | /// It is the caller's responsibility to read the `.debug_aranges` section and |
22 | /// present it as a `&[u8]` slice. That means using some ELF loader on |
23 | /// Linux, a Mach-O loader on macOS, etc. |
24 | /// |
25 | /// ``` |
26 | /// use gimli::{DebugAranges, LittleEndian}; |
27 | /// |
28 | /// # let buf = []; |
29 | /// # let read_debug_aranges_section = || &buf; |
30 | /// let debug_aranges = |
31 | /// DebugAranges::new(read_debug_aranges_section(), LittleEndian); |
32 | /// ``` |
33 | pub fn new(section: &'input [u8], endian: Endian) -> Self { |
34 | DebugAranges { |
35 | section: EndianSlice::new(slice:section, endian), |
36 | } |
37 | } |
38 | } |
39 | |
40 | impl<R: Reader> DebugAranges<R> { |
41 | /// Iterate the sets of entries in the `.debug_aranges` section. |
42 | /// |
43 | /// Each set of entries belongs to a single unit. |
44 | pub fn headers(&self) -> ArangeHeaderIter<R> { |
45 | ArangeHeaderIter { |
46 | input: self.section.clone(), |
47 | offset: DebugArangesOffset(R::Offset::from_u8(offset:0)), |
48 | } |
49 | } |
50 | |
51 | /// Get the header at the given offset. |
52 | pub fn header(&self, offset: DebugArangesOffset<R::Offset>) -> Result<ArangeHeader<R>> { |
53 | let mut input: R = self.section.clone(); |
54 | input.skip(len:offset.0)?; |
55 | ArangeHeader::parse(&mut input, offset) |
56 | } |
57 | } |
58 | |
59 | impl<T> DebugAranges<T> { |
60 | /// Create a `DebugAranges` section that references the data in `self`. |
61 | /// |
62 | /// This is useful when `R` implements `Reader` but `T` does not. |
63 | /// |
64 | /// Used by `DwarfSections::borrow`. |
65 | pub fn borrow<'a, F, R>(&'a self, mut borrow: F) -> DebugAranges<R> |
66 | where |
67 | F: FnMut(&'a T) -> R, |
68 | { |
69 | borrow(&self.section).into() |
70 | } |
71 | } |
72 | |
73 | impl<R> Section<R> for DebugAranges<R> { |
74 | fn id() -> SectionId { |
75 | SectionId::DebugAranges |
76 | } |
77 | |
78 | fn reader(&self) -> &R { |
79 | &self.section |
80 | } |
81 | } |
82 | |
83 | impl<R> From<R> for DebugAranges<R> { |
84 | fn from(section: R) -> Self { |
85 | DebugAranges { section } |
86 | } |
87 | } |
88 | |
89 | /// An iterator over the headers of a `.debug_aranges` section. |
90 | #[derive (Clone, Debug)] |
91 | pub struct ArangeHeaderIter<R: Reader> { |
92 | input: R, |
93 | offset: DebugArangesOffset<R::Offset>, |
94 | } |
95 | |
96 | impl<R: Reader> ArangeHeaderIter<R> { |
97 | /// Advance the iterator to the next header. |
98 | pub fn next(&mut self) -> Result<Option<ArangeHeader<R>>> { |
99 | if self.input.is_empty() { |
100 | return Ok(None); |
101 | } |
102 | |
103 | let len: ::Offset = self.input.len(); |
104 | match ArangeHeader::parse(&mut self.input, self.offset) { |
105 | Ok(header: ArangeHeader::Offset>) => { |
106 | self.offset.0 += len - self.input.len(); |
107 | Ok(Some(header)) |
108 | } |
109 | Err(e: Error) => { |
110 | self.input.empty(); |
111 | Err(e) |
112 | } |
113 | } |
114 | } |
115 | } |
116 | |
117 | #[cfg (feature = "fallible-iterator" )] |
118 | impl<R: Reader> fallible_iterator::FallibleIterator for ArangeHeaderIter<R> { |
119 | type Item = ArangeHeader<R>; |
120 | type Error = Error; |
121 | |
122 | fn next(&mut self) -> ::core::result::Result<Option<Self::Item>, Self::Error> { |
123 | ArangeHeaderIter::next(self) |
124 | } |
125 | } |
126 | |
127 | /// A header for a set of entries in the `.debug_arange` section. |
128 | /// |
129 | /// These entries all belong to a single unit. |
130 | #[derive (Debug, Clone, PartialEq, Eq)] |
131 | pub struct ArangeHeader<R, Offset = <R as Reader>::Offset> |
132 | where |
133 | R: Reader<Offset = Offset>, |
134 | Offset: ReaderOffset, |
135 | { |
136 | offset: DebugArangesOffset<Offset>, |
137 | encoding: Encoding, |
138 | length: Offset, |
139 | debug_info_offset: DebugInfoOffset<Offset>, |
140 | entries: R, |
141 | } |
142 | |
143 | impl<R, Offset> ArangeHeader<R, Offset> |
144 | where |
145 | R: Reader<Offset = Offset>, |
146 | Offset: ReaderOffset, |
147 | { |
148 | fn parse(input: &mut R, offset: DebugArangesOffset<Offset>) -> Result<Self> { |
149 | let (length, format) = input.read_initial_length()?; |
150 | let mut rest = input.split(length)?; |
151 | |
152 | // Check the version. The DWARF 5 spec says that this is always 2, but version 3 |
153 | // has been observed in the wild, potentially due to a bug; see |
154 | // https://github.com/gimli-rs/gimli/issues/559 for more information. |
155 | // lldb allows versions 2 through 5, possibly by mistake. |
156 | let version = rest.read_u16()?; |
157 | if version != 2 && version != 3 { |
158 | return Err(Error::UnknownVersion(u64::from(version))); |
159 | } |
160 | |
161 | let debug_info_offset = rest.read_offset(format).map(DebugInfoOffset)?; |
162 | let address_size = rest.read_address_size()?; |
163 | let segment_size = rest.read_u8()?; |
164 | if segment_size != 0 { |
165 | return Err(Error::UnsupportedSegmentSize); |
166 | } |
167 | |
168 | // unit_length + version + offset + address_size + segment_size |
169 | let header_length = format.initial_length_size() + 2 + format.word_size() + 1 + 1; |
170 | |
171 | // The first tuple following the header in each set begins at an offset that is |
172 | // a multiple of the size of a single tuple (that is, twice the size of an address). |
173 | let tuple_length = address_size |
174 | .checked_mul(2) |
175 | .ok_or(Error::UnsupportedAddressSize(address_size))?; |
176 | if tuple_length == 0 { |
177 | return Err(Error::UnsupportedAddressSize(address_size)); |
178 | } |
179 | let padding = if header_length % tuple_length == 0 { |
180 | 0 |
181 | } else { |
182 | tuple_length - header_length % tuple_length |
183 | }; |
184 | rest.skip(R::Offset::from_u8(padding))?; |
185 | |
186 | let encoding = Encoding { |
187 | format, |
188 | version, |
189 | address_size, |
190 | }; |
191 | Ok(ArangeHeader { |
192 | offset, |
193 | encoding, |
194 | length, |
195 | debug_info_offset, |
196 | entries: rest, |
197 | }) |
198 | } |
199 | |
200 | /// Return the offset of this header within the `.debug_aranges` section. |
201 | #[inline ] |
202 | pub fn offset(&self) -> DebugArangesOffset<Offset> { |
203 | self.offset |
204 | } |
205 | |
206 | /// Return the length of this set of entries, including the header. |
207 | #[inline ] |
208 | pub fn length(&self) -> Offset { |
209 | self.length |
210 | } |
211 | |
212 | /// Return the encoding parameters for this set of entries. |
213 | #[inline ] |
214 | pub fn encoding(&self) -> Encoding { |
215 | self.encoding |
216 | } |
217 | |
218 | /// Return the offset into the .debug_info section for this set of arange entries. |
219 | #[inline ] |
220 | pub fn debug_info_offset(&self) -> DebugInfoOffset<Offset> { |
221 | self.debug_info_offset |
222 | } |
223 | |
224 | /// Return the arange entries in this set. |
225 | #[inline ] |
226 | pub fn entries(&self) -> ArangeEntryIter<R> { |
227 | ArangeEntryIter { |
228 | input: self.entries.clone(), |
229 | encoding: self.encoding, |
230 | } |
231 | } |
232 | } |
233 | |
234 | /// An iterator over the aranges from a `.debug_aranges` section. |
235 | /// |
236 | /// Can be [used with |
237 | /// `FallibleIterator`](./index.html#using-with-fallibleiterator). |
238 | #[derive (Debug, Clone)] |
239 | pub struct ArangeEntryIter<R: Reader> { |
240 | input: R, |
241 | encoding: Encoding, |
242 | } |
243 | |
244 | impl<R: Reader> ArangeEntryIter<R> { |
245 | /// Advance the iterator and return the next arange. |
246 | /// |
247 | /// Returns the newly parsed arange as `Ok(Some(arange))`. Returns `Ok(None)` |
248 | /// when iteration is complete and all aranges have already been parsed and |
249 | /// yielded. If an error occurs while parsing the next arange, then this error |
250 | /// is returned as `Err(e)`, and all subsequent calls return `Ok(None)`. |
251 | pub fn next(&mut self) -> Result<Option<ArangeEntry>> { |
252 | loop { |
253 | let raw_entry = match self.next_raw()? { |
254 | Some(entry) => entry, |
255 | None => return Ok(None), |
256 | }; |
257 | |
258 | let entry = self.convert_raw(raw_entry)?; |
259 | if entry.is_some() { |
260 | return Ok(entry); |
261 | } |
262 | } |
263 | } |
264 | |
265 | /// Advance the iterator and return the next arange without validating it. |
266 | /// |
267 | /// The returned entry will have `range.end` set to 0. |
268 | /// This will return tombstone entries as well. |
269 | pub fn next_raw(&mut self) -> Result<Option<ArangeEntry>> { |
270 | if self.input.is_empty() { |
271 | return Ok(None); |
272 | } |
273 | |
274 | match ArangeEntry::parse(&mut self.input, self.encoding) { |
275 | Ok(Some(entry)) => Ok(Some(entry)), |
276 | Ok(None) => { |
277 | self.input.empty(); |
278 | Ok(None) |
279 | } |
280 | Err(e) => { |
281 | self.input.empty(); |
282 | Err(e) |
283 | } |
284 | } |
285 | } |
286 | |
287 | /// Convert a raw range into a range. |
288 | /// |
289 | /// The raw range should have been obtained from `next_raw`. |
290 | #[doc (hidden)] |
291 | pub fn convert_raw(&self, mut entry: ArangeEntry) -> Result<Option<ArangeEntry>> { |
292 | // Skip tombstone entries. |
293 | // DWARF specifies a tombstone value of -1, but many linkers use 0. |
294 | // However, 0 may be a valid address, so the caller must handle that case. |
295 | let address_size = self.encoding.address_size; |
296 | let tombstone_address = !0 >> (64 - self.encoding.address_size * 8); |
297 | if entry.range.begin == tombstone_address { |
298 | return Ok(None); |
299 | } |
300 | |
301 | // Calculate end now so that we can handle overflow. |
302 | entry.range.end = entry.range.begin.add_sized(entry.length, address_size)?; |
303 | Ok(Some(entry)) |
304 | } |
305 | } |
306 | |
307 | #[cfg (feature = "fallible-iterator" )] |
308 | impl<R: Reader> fallible_iterator::FallibleIterator for ArangeEntryIter<R> { |
309 | type Item = ArangeEntry; |
310 | type Error = Error; |
311 | |
312 | fn next(&mut self) -> ::core::result::Result<Option<Self::Item>, Self::Error> { |
313 | ArangeEntryIter::next(self) |
314 | } |
315 | } |
316 | |
317 | /// A single parsed arange. |
318 | #[derive (Debug, Clone, PartialEq, Eq, PartialOrd, Ord)] |
319 | pub struct ArangeEntry { |
320 | range: Range, |
321 | length: u64, |
322 | } |
323 | |
324 | impl ArangeEntry { |
325 | /// Parse a single arange. Return `None` for the null arange, `Some` for an actual arange. |
326 | fn parse<R: Reader>(input: &mut R, encoding: Encoding) -> Result<Option<Self>> { |
327 | let address_size = encoding.address_size; |
328 | |
329 | let tuple_length = R::Offset::from_u8(2 * address_size); |
330 | if tuple_length > input.len() { |
331 | input.empty(); |
332 | return Ok(None); |
333 | } |
334 | |
335 | let begin = input.read_address(address_size)?; |
336 | let length = input.read_address(address_size)?; |
337 | let range = Range { begin, end: 0 }; |
338 | |
339 | match (begin, length) { |
340 | // This is meant to be a null terminator, but in practice it can occur |
341 | // before the end, possibly due to a linker omitting a function and |
342 | // leaving an unrelocated entry. |
343 | (0, 0) => Self::parse(input, encoding), |
344 | _ => Ok(Some(ArangeEntry { range, length })), |
345 | } |
346 | } |
347 | |
348 | /// Return the beginning address of this arange. |
349 | #[inline ] |
350 | pub fn address(&self) -> u64 { |
351 | self.range.begin |
352 | } |
353 | |
354 | /// Return the length of this arange. |
355 | #[inline ] |
356 | pub fn length(&self) -> u64 { |
357 | self.length |
358 | } |
359 | |
360 | /// Return the range. |
361 | #[inline ] |
362 | pub fn range(&self) -> Range { |
363 | self.range |
364 | } |
365 | } |
366 | |
367 | #[cfg (test)] |
368 | mod tests { |
369 | use super::*; |
370 | use crate::common::{DebugInfoOffset, Format}; |
371 | use crate::endianity::LittleEndian; |
372 | use crate::read::EndianSlice; |
373 | |
374 | #[test ] |
375 | fn test_iterate_headers() { |
376 | #[rustfmt::skip] |
377 | let buf = [ |
378 | // 32-bit length = 28. |
379 | 0x1c, 0x00, 0x00, 0x00, |
380 | // Version. |
381 | 0x02, 0x00, |
382 | // Offset. |
383 | 0x01, 0x02, 0x03, 0x04, |
384 | // Address size. |
385 | 0x04, |
386 | // Segment size. |
387 | 0x00, |
388 | // Dummy padding and arange tuples. |
389 | 0x00, 0x00, 0x00, 0x00, |
390 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
391 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
392 | |
393 | // 32-bit length = 36. |
394 | 0x24, 0x00, 0x00, 0x00, |
395 | // Version. |
396 | 0x02, 0x00, |
397 | // Offset. |
398 | 0x11, 0x12, 0x13, 0x14, |
399 | // Address size. |
400 | 0x04, |
401 | // Segment size. |
402 | 0x00, |
403 | // Dummy padding and arange tuples. |
404 | 0x00, 0x00, 0x00, 0x00, |
405 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
406 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
407 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
408 | ]; |
409 | |
410 | let debug_aranges = DebugAranges::new(&buf, LittleEndian); |
411 | let mut headers = debug_aranges.headers(); |
412 | |
413 | let header = headers |
414 | .next() |
415 | .expect("should parse header ok" ) |
416 | .expect("should have a header" ); |
417 | assert_eq!(header.offset(), DebugArangesOffset(0)); |
418 | assert_eq!(header.debug_info_offset(), DebugInfoOffset(0x0403_0201)); |
419 | |
420 | let header = headers |
421 | .next() |
422 | .expect("should parse header ok" ) |
423 | .expect("should have a header" ); |
424 | assert_eq!(header.offset(), DebugArangesOffset(0x20)); |
425 | assert_eq!(header.debug_info_offset(), DebugInfoOffset(0x1413_1211)); |
426 | } |
427 | |
428 | #[test ] |
429 | fn test_parse_header_ok() { |
430 | #[rustfmt::skip] |
431 | let buf = [ |
432 | // 32-bit length = 28 (8 bytes header, 4 bytes padding, 16 bytes tuple data). |
433 | 0x1c, 0x00, 0x00, 0x00, |
434 | // Version. |
435 | 0x02, 0x00, |
436 | // Offset. |
437 | 0x01, 0x02, 0x03, 0x04, |
438 | // Address size. |
439 | 0x08, |
440 | // Segment size. |
441 | 0x00, |
442 | // Length to here = 12, tuple length = 16. |
443 | // Padding to tuple length multiple = 4. |
444 | 0x10, 0x00, 0x00, 0x00, |
445 | |
446 | // Dummy arange tuple data. |
447 | 0x20, 0x00, 0x00, 0x00, |
448 | 0x00, 0x00, 0x00, 0x00, |
449 | 0x00, 0x00, 0x00, 0x00, |
450 | 0x00, 0x00, 0x00, 0x00, |
451 | |
452 | // Dummy next arange. |
453 | 0x30, 0x00, 0x00, 0x00, |
454 | 0x00, 0x00, 0x00, 0x00, |
455 | 0x00, 0x00, 0x00, 0x00, |
456 | 0x00, 0x00, 0x00, 0x00, |
457 | ]; |
458 | |
459 | let rest = &mut EndianSlice::new(&buf, LittleEndian); |
460 | |
461 | let header = |
462 | ArangeHeader::parse(rest, DebugArangesOffset(0x10)).expect("should parse header ok" ); |
463 | |
464 | assert_eq!( |
465 | *rest, |
466 | EndianSlice::new(&buf[buf.len() - 16..], LittleEndian) |
467 | ); |
468 | assert_eq!( |
469 | header, |
470 | ArangeHeader { |
471 | offset: DebugArangesOffset(0x10), |
472 | encoding: Encoding { |
473 | format: Format::Dwarf32, |
474 | version: 2, |
475 | address_size: 8, |
476 | }, |
477 | length: 0x1c, |
478 | debug_info_offset: DebugInfoOffset(0x0403_0201), |
479 | entries: EndianSlice::new(&buf[buf.len() - 32..buf.len() - 16], LittleEndian), |
480 | } |
481 | ); |
482 | } |
483 | |
484 | #[test ] |
485 | fn test_parse_header_overflow_error() { |
486 | #[rustfmt::skip] |
487 | let buf = [ |
488 | // 32-bit length = 32. |
489 | 0x20, 0x00, 0x00, 0x00, |
490 | // Version. |
491 | 0x02, 0x00, |
492 | // Offset. |
493 | 0x01, 0x02, 0x03, 0x04, |
494 | // Address size. |
495 | 0xff, |
496 | // Segment size. |
497 | 0x00, |
498 | // Length to here = 12, tuple length = 20. |
499 | // Padding to tuple length multiple = 4. |
500 | 0x10, 0x00, 0x00, 0x00, |
501 | 0x00, 0x00, 0x00, 0x00, |
502 | |
503 | // Dummy arange tuple data. |
504 | 0x20, 0x00, 0x00, 0x00, |
505 | 0x00, 0x00, 0x00, 0x00, |
506 | 0x00, 0x00, 0x00, 0x00, |
507 | 0x00, 0x00, 0x00, 0x00, |
508 | |
509 | // Dummy next arange. |
510 | 0x30, 0x00, 0x00, 0x00, |
511 | 0x00, 0x00, 0x00, 0x00, |
512 | 0x00, 0x00, 0x00, 0x00, |
513 | 0x00, 0x00, 0x00, 0x00, |
514 | ]; |
515 | |
516 | let rest = &mut EndianSlice::new(&buf, LittleEndian); |
517 | |
518 | let error = ArangeHeader::parse(rest, DebugArangesOffset(0x10)) |
519 | .expect_err("should fail to parse header" ); |
520 | assert_eq!(error, Error::UnsupportedAddressSize(0xff)); |
521 | } |
522 | |
523 | #[test ] |
524 | fn test_parse_header_div_by_zero_error() { |
525 | #[rustfmt::skip] |
526 | let buf = [ |
527 | // 32-bit length = 32. |
528 | 0x20, 0x00, 0x00, 0x00, |
529 | // Version. |
530 | 0x02, 0x00, |
531 | // Offset. |
532 | 0x01, 0x02, 0x03, 0x04, |
533 | // Address size = 0. Could cause a division by zero if we aren't |
534 | // careful. |
535 | 0x00, |
536 | // Segment size. |
537 | 0x00, |
538 | // Length to here = 12, tuple length = 20. |
539 | // Padding to tuple length multiple = 4. |
540 | 0x10, 0x00, 0x00, 0x00, |
541 | 0x00, 0x00, 0x00, 0x00, |
542 | |
543 | // Dummy arange tuple data. |
544 | 0x20, 0x00, 0x00, 0x00, |
545 | 0x00, 0x00, 0x00, 0x00, |
546 | 0x00, 0x00, 0x00, 0x00, |
547 | 0x00, 0x00, 0x00, 0x00, |
548 | |
549 | // Dummy next arange. |
550 | 0x30, 0x00, 0x00, 0x00, |
551 | 0x00, 0x00, 0x00, 0x00, |
552 | 0x00, 0x00, 0x00, 0x00, |
553 | 0x00, 0x00, 0x00, 0x00, |
554 | ]; |
555 | |
556 | let rest = &mut EndianSlice::new(&buf, LittleEndian); |
557 | |
558 | let error = ArangeHeader::parse(rest, DebugArangesOffset(0x10)) |
559 | .expect_err("should fail to parse header" ); |
560 | assert_eq!(error, Error::UnsupportedAddressSize(0)); |
561 | } |
562 | |
563 | #[test ] |
564 | fn test_parse_entry_ok() { |
565 | let encoding = Encoding { |
566 | format: Format::Dwarf32, |
567 | version: 2, |
568 | address_size: 4, |
569 | }; |
570 | let buf = [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09]; |
571 | let mut iter = ArangeEntryIter { |
572 | input: EndianSlice::new(&buf, LittleEndian), |
573 | encoding, |
574 | }; |
575 | let entry = iter.next().expect("should parse entry ok" ); |
576 | assert_eq!( |
577 | iter.input, |
578 | EndianSlice::new(&buf[buf.len() - 1..], LittleEndian) |
579 | ); |
580 | assert_eq!( |
581 | entry, |
582 | Some(ArangeEntry { |
583 | range: Range { |
584 | begin: 0x0403_0201, |
585 | end: 0x0403_0201 + 0x0807_0605, |
586 | }, |
587 | length: 0x0807_0605, |
588 | }) |
589 | ); |
590 | } |
591 | |
592 | #[test ] |
593 | fn test_parse_entry_zero() { |
594 | let encoding = Encoding { |
595 | format: Format::Dwarf32, |
596 | version: 2, |
597 | address_size: 4, |
598 | }; |
599 | #[rustfmt::skip] |
600 | let buf = [ |
601 | // Zero tuple. |
602 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
603 | // Address. |
604 | 0x01, 0x02, 0x03, 0x04, |
605 | // Length. |
606 | 0x05, 0x06, 0x07, 0x08, |
607 | // Next tuple. |
608 | 0x09 |
609 | ]; |
610 | let mut iter = ArangeEntryIter { |
611 | input: EndianSlice::new(&buf, LittleEndian), |
612 | encoding, |
613 | }; |
614 | let entry = iter.next().expect("should parse entry ok" ); |
615 | assert_eq!( |
616 | iter.input, |
617 | EndianSlice::new(&buf[buf.len() - 1..], LittleEndian) |
618 | ); |
619 | assert_eq!( |
620 | entry, |
621 | Some(ArangeEntry { |
622 | range: Range { |
623 | begin: 0x0403_0201, |
624 | end: 0x0403_0201 + 0x0807_0605, |
625 | }, |
626 | length: 0x0807_0605, |
627 | }) |
628 | ); |
629 | } |
630 | |
631 | #[test ] |
632 | fn test_parse_entry_overflow_32() { |
633 | let encoding = Encoding { |
634 | format: Format::Dwarf32, |
635 | version: 2, |
636 | address_size: 4, |
637 | }; |
638 | #[rustfmt::skip] |
639 | let buf = [ |
640 | // Address. |
641 | 0x01, 0x02, 0x03, 0x84, |
642 | // Length. |
643 | 0x05, 0x06, 0x07, 0x88, |
644 | // Next tuple. |
645 | 0x09 |
646 | ]; |
647 | let mut iter = ArangeEntryIter { |
648 | input: EndianSlice::new(&buf, LittleEndian), |
649 | encoding, |
650 | }; |
651 | let entry = iter.next(); |
652 | assert_eq!( |
653 | iter.input, |
654 | EndianSlice::new(&buf[buf.len() - 1..], LittleEndian) |
655 | ); |
656 | assert_eq!(entry, Err(Error::AddressOverflow)); |
657 | } |
658 | |
659 | #[test ] |
660 | fn test_parse_entry_overflow_64() { |
661 | let encoding = Encoding { |
662 | format: Format::Dwarf32, |
663 | version: 2, |
664 | address_size: 8, |
665 | }; |
666 | #[rustfmt::skip] |
667 | let buf = [ |
668 | // Address. |
669 | 0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x80, |
670 | // Length. |
671 | 0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x80, |
672 | // Next tuple. |
673 | 0x09 |
674 | ]; |
675 | let mut iter = ArangeEntryIter { |
676 | input: EndianSlice::new(&buf, LittleEndian), |
677 | encoding, |
678 | }; |
679 | let entry = iter.next(); |
680 | assert_eq!( |
681 | iter.input, |
682 | EndianSlice::new(&buf[buf.len() - 1..], LittleEndian) |
683 | ); |
684 | assert_eq!(entry, Err(Error::AddressOverflow)); |
685 | } |
686 | |
687 | #[test ] |
688 | fn test_parse_entry_tombstone_32() { |
689 | let encoding = Encoding { |
690 | format: Format::Dwarf32, |
691 | version: 2, |
692 | address_size: 4, |
693 | }; |
694 | #[rustfmt::skip] |
695 | let buf = [ |
696 | // Address. |
697 | 0xff, 0xff, 0xff, 0xff, |
698 | // Length. |
699 | 0x05, 0x06, 0x07, 0x08, |
700 | // Address. |
701 | 0x01, 0x02, 0x03, 0x04, |
702 | // Length. |
703 | 0x05, 0x06, 0x07, 0x08, |
704 | // Next tuple. |
705 | 0x09 |
706 | ]; |
707 | |
708 | let mut iter = ArangeEntryIter { |
709 | input: EndianSlice::new(&buf, LittleEndian), |
710 | encoding, |
711 | }; |
712 | let entry = iter.next_raw().unwrap(); |
713 | assert_eq!( |
714 | iter.input, |
715 | EndianSlice::new(&buf[buf.len() - 9..], LittleEndian) |
716 | ); |
717 | assert_eq!( |
718 | entry, |
719 | Some(ArangeEntry { |
720 | range: Range { |
721 | begin: 0xffff_ffff, |
722 | end: 0, |
723 | }, |
724 | length: 0x0807_0605, |
725 | }) |
726 | ); |
727 | |
728 | let mut iter = ArangeEntryIter { |
729 | input: EndianSlice::new(&buf, LittleEndian), |
730 | encoding, |
731 | }; |
732 | let entry = iter.next().unwrap(); |
733 | assert_eq!( |
734 | iter.input, |
735 | EndianSlice::new(&buf[buf.len() - 1..], LittleEndian) |
736 | ); |
737 | assert_eq!( |
738 | entry, |
739 | Some(ArangeEntry { |
740 | range: Range { |
741 | begin: 0x0403_0201, |
742 | end: 0x0403_0201 + 0x0807_0605, |
743 | }, |
744 | length: 0x0807_0605, |
745 | }) |
746 | ); |
747 | } |
748 | |
749 | #[test ] |
750 | fn test_parse_entry_tombstone_64() { |
751 | let encoding = Encoding { |
752 | format: Format::Dwarf32, |
753 | version: 2, |
754 | address_size: 8, |
755 | }; |
756 | #[rustfmt::skip] |
757 | let buf = [ |
758 | // Address. |
759 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
760 | // Length. |
761 | 0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00, |
762 | // Address. |
763 | 0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00, |
764 | // Length. |
765 | 0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00, |
766 | // Next tuple. |
767 | 0x09 |
768 | ]; |
769 | |
770 | let mut iter = ArangeEntryIter { |
771 | input: EndianSlice::new(&buf, LittleEndian), |
772 | encoding, |
773 | }; |
774 | let entry = iter.next_raw().unwrap(); |
775 | assert_eq!( |
776 | iter.input, |
777 | EndianSlice::new(&buf[buf.len() - 17..], LittleEndian) |
778 | ); |
779 | assert_eq!( |
780 | entry, |
781 | Some(ArangeEntry { |
782 | range: Range { |
783 | begin: 0xffff_ffff_ffff_ffff, |
784 | end: 0, |
785 | }, |
786 | length: 0x0807_0605, |
787 | }) |
788 | ); |
789 | |
790 | let mut iter = ArangeEntryIter { |
791 | input: EndianSlice::new(&buf, LittleEndian), |
792 | encoding, |
793 | }; |
794 | let entry = iter.next().unwrap(); |
795 | assert_eq!( |
796 | iter.input, |
797 | EndianSlice::new(&buf[buf.len() - 1..], LittleEndian) |
798 | ); |
799 | assert_eq!( |
800 | entry, |
801 | Some(ArangeEntry { |
802 | range: Range { |
803 | begin: 0x0403_0201, |
804 | end: 0x0403_0201 + 0x0807_0605, |
805 | }, |
806 | length: 0x0807_0605, |
807 | }) |
808 | ); |
809 | } |
810 | } |
811 | |