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Initial vendor packages

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Signed-off-by: Valentin Popov <valentin@popov.link>
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Valentin Popov
2024-01-08 01:21:28 +04:00
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{"files":{"Cargo.toml":"f4132bc65d5e58e2f27b9f9ef197b1c286582137b65285292b75a5a230fc81c8","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"378f5840b258e2779c39418f3f2d7b2ba96f1c7917dd6be0713f88305dbda397","README.md":"3bb7af78423e95b207beebd452cdd973d65663cf25a0fc9358c588f53783293c","src/legacy.rs":"b4d5a140ed0bf2d792431961d6fd44a21c99235489a2c9f6717d1577a42c09ce","src/lib.rs":"607fe60c1e65da3f86a0b4b8fececb7db79049a0cd4cb316492e8e6593bf39c6","src/v0-large-test-symbols/early-recursion-limit":"96861a7042db35ee0bd04802820d0f2d6a3b534ce13547912b6364001ffd1494","src/v0.rs":"4e5bd069aa61def3dc732b3a285861914895272668ddfcb6b9eef46dd5713041"},"package":"d626bb9dae77e28219937af045c257c28bfd3f69333c512553507f5f9798cb76"}

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# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g., crates.io) dependencies.
#
# If you are reading this file be aware that the original Cargo.toml
# will likely look very different (and much more reasonable).
# See Cargo.toml.orig for the original contents.
[package]
name = "rustc-demangle"
version = "0.1.23"
authors = ["Alex Crichton <alex@alexcrichton.com>"]
description = """
Rust compiler symbol demangling.
"""
homepage = "https://github.com/alexcrichton/rustc-demangle"
documentation = "https://docs.rs/rustc-demangle"
readme = "README.md"
license = "MIT/Apache-2.0"
repository = "https://github.com/alexcrichton/rustc-demangle"
[package.metadata.docs.rs]
features = ["std"]
rustdoc-args = [
"--cfg",
"docsrs",
]
[profile.release]
lto = true
[dependencies.compiler_builtins]
version = "0.1.2"
optional = true
[dependencies.core]
version = "1.0.0"
optional = true
package = "rustc-std-workspace-core"
[features]
rustc-dep-of-std = [
"core",
"compiler_builtins",
]
std = []

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Copyright (c) 2014 Alex Crichton
Permission is hereby granted, free of charge, to any
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# rustc-demangle
Demangling for Rust symbols, written in Rust.
[Documentation](https://docs.rs/rustc-demangle)
## Usage
You can add this as a dependency via your `Cargo.toml`
```toml
[dependencies]
rustc-demangle = "0.1"
```
and then be sure to check out the [crate
documentation](https://docs.rs/rustc-demangle) for usage.
## Usage from non-Rust languages
You can also use this crate from other languages via the C API wrapper in the
`crates/capi` directory. This can be build with:
```sh
$ cargo build -p rustc-demangle-capi --release
```
You'll then find `target/release/librustc_demangle.a` and
`target/release/librustc_demangle.so` (or a different name depending on your
platform). These objects implement the interface specified in
`crates/capi/include/rustc_demangle.h`.
# License
This project is licensed under either of
* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or
http://opensource.org/licenses/MIT)
at your option.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in rustc-demangle you, as defined in the Apache-2.0 license, shall
be dual licensed as above, without any additional terms or conditions.

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use core::char;
use core::fmt;
/// Representation of a demangled symbol name.
pub struct Demangle<'a> {
inner: &'a str,
/// The number of ::-separated elements in the original name.
elements: usize,
}
/// De-mangles a Rust symbol into a more readable version
///
/// All Rust symbols by default are mangled as they contain characters that
/// cannot be represented in all object files. The mangling mechanism is similar
/// to C++'s, but Rust has a few specifics to handle items like lifetimes in
/// symbols.
///
/// This function will take a **mangled** symbol and return a value. When printed,
/// the de-mangled version will be written. If the symbol does not look like
/// a mangled symbol, the original value will be written instead.
///
/// # Examples
///
/// ```
/// use rustc_demangle::demangle;
///
/// assert_eq!(demangle("_ZN4testE").to_string(), "test");
/// assert_eq!(demangle("_ZN3foo3barE").to_string(), "foo::bar");
/// assert_eq!(demangle("foo").to_string(), "foo");
/// ```
// All Rust symbols are in theory lists of "::"-separated identifiers. Some
// assemblers, however, can't handle these characters in symbol names. To get
// around this, we use C++-style mangling. The mangling method is:
//
// 1. Prefix the symbol with "_ZN"
// 2. For each element of the path, emit the length plus the element
// 3. End the path with "E"
//
// For example, "_ZN4testE" => "test" and "_ZN3foo3barE" => "foo::bar".
//
// We're the ones printing our backtraces, so we can't rely on anything else to
// demangle our symbols. It's *much* nicer to look at demangled symbols, so
// this function is implemented to give us nice pretty output.
//
// Note that this demangler isn't quite as fancy as it could be. We have lots
// of other information in our symbols like hashes, version, type information,
// etc. Additionally, this doesn't handle glue symbols at all.
pub fn demangle(s: &str) -> Result<(Demangle, &str), ()> {
// First validate the symbol. If it doesn't look like anything we're
// expecting, we just print it literally. Note that we must handle non-Rust
// symbols because we could have any function in the backtrace.
let inner = if s.starts_with("_ZN") {
&s[3..]
} else if s.starts_with("ZN") {
// On Windows, dbghelp strips leading underscores, so we accept "ZN...E"
// form too.
&s[2..]
} else if s.starts_with("__ZN") {
// On OSX, symbols are prefixed with an extra _
&s[4..]
} else {
return Err(());
};
// only work with ascii text
if inner.bytes().any(|c| c & 0x80 != 0) {
return Err(());
}
let mut elements = 0;
let mut chars = inner.chars();
let mut c = chars.next().ok_or(())?;
while c != 'E' {
// Decode an identifier element's length.
if !c.is_digit(10) {
return Err(());
}
let mut len = 0usize;
while let Some(d) = c.to_digit(10) {
len = len
.checked_mul(10)
.and_then(|len| len.checked_add(d as usize))
.ok_or(())?;
c = chars.next().ok_or(())?;
}
// `c` already contains the first character of this identifier, skip it and
// all the other characters of this identifier, to reach the next element.
for _ in 0..len {
c = chars.next().ok_or(())?;
}
elements += 1;
}
Ok((Demangle { inner, elements }, chars.as_str()))
}
// Rust hashes are hex digits with an `h` prepended.
fn is_rust_hash(s: &str) -> bool {
s.starts_with('h') && s[1..].chars().all(|c| c.is_digit(16))
}
impl<'a> fmt::Display for Demangle<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
// Alright, let's do this.
let mut inner = self.inner;
for element in 0..self.elements {
let mut rest = inner;
while rest.chars().next().unwrap().is_digit(10) {
rest = &rest[1..];
}
let i: usize = inner[..(inner.len() - rest.len())].parse().unwrap();
inner = &rest[i..];
rest = &rest[..i];
// Skip printing the hash if alternate formatting
// was requested.
if f.alternate() && element + 1 == self.elements && is_rust_hash(&rest) {
break;
}
if element != 0 {
f.write_str("::")?;
}
if rest.starts_with("_$") {
rest = &rest[1..];
}
loop {
if rest.starts_with('.') {
if let Some('.') = rest[1..].chars().next() {
f.write_str("::")?;
rest = &rest[2..];
} else {
f.write_str(".")?;
rest = &rest[1..];
}
} else if rest.starts_with('$') {
let (escape, after_escape) = if let Some(end) = rest[1..].find('$') {
(&rest[1..=end], &rest[end + 2..])
} else {
break;
};
// see src/librustc_codegen_utils/symbol_names/legacy.rs for these mappings
let unescaped = match escape {
"SP" => "@",
"BP" => "*",
"RF" => "&",
"LT" => "<",
"GT" => ">",
"LP" => "(",
"RP" => ")",
"C" => ",",
_ => {
if escape.starts_with('u') {
let digits = &escape[1..];
let all_lower_hex = digits.chars().all(|c| match c {
'0'..='9' | 'a'..='f' => true,
_ => false,
});
let c = u32::from_str_radix(digits, 16)
.ok()
.and_then(char::from_u32);
if let (true, Some(c)) = (all_lower_hex, c) {
// FIXME(eddyb) do we need to filter out control codepoints?
if !c.is_control() {
c.fmt(f)?;
rest = after_escape;
continue;
}
}
}
break;
}
};
f.write_str(unescaped)?;
rest = after_escape;
} else if let Some(i) = rest.find(|c| c == '$' || c == '.') {
f.write_str(&rest[..i])?;
rest = &rest[i..];
} else {
break;
}
}
f.write_str(rest)?;
}
Ok(())
}
}
#[cfg(test)]
mod tests {
use std::prelude::v1::*;
macro_rules! t {
($a:expr, $b:expr) => {
assert!(ok($a, $b))
};
}
macro_rules! t_err {
($a:expr) => {
assert!(ok_err($a))
};
}
macro_rules! t_nohash {
($a:expr, $b:expr) => {{
assert_eq!(format!("{:#}", ::demangle($a)), $b);
}};
}
fn ok(sym: &str, expected: &str) -> bool {
match ::try_demangle(sym) {
Ok(s) => {
if s.to_string() == expected {
true
} else {
println!("\n{}\n!=\n{}\n", s, expected);
false
}
}
Err(_) => {
println!("error demangling");
false
}
}
}
fn ok_err(sym: &str) -> bool {
match ::try_demangle(sym) {
Ok(_) => {
println!("succeeded in demangling");
false
}
Err(_) => ::demangle(sym).to_string() == sym,
}
}
#[test]
fn demangle() {
t_err!("test");
t!("_ZN4testE", "test");
t_err!("_ZN4test");
t!("_ZN4test1a2bcE", "test::a::bc");
}
#[test]
fn demangle_dollars() {
t!("_ZN4$RP$E", ")");
t!("_ZN8$RF$testE", "&test");
t!("_ZN8$BP$test4foobE", "*test::foob");
t!("_ZN9$u20$test4foobE", " test::foob");
t!("_ZN35Bar$LT$$u5b$u32$u3b$$u20$4$u5d$$GT$E", "Bar<[u32; 4]>");
}
#[test]
fn demangle_many_dollars() {
t!("_ZN13test$u20$test4foobE", "test test::foob");
t!("_ZN12test$BP$test4foobE", "test*test::foob");
}
#[test]
fn demangle_osx() {
t!(
"__ZN5alloc9allocator6Layout9for_value17h02a996811f781011E",
"alloc::allocator::Layout::for_value::h02a996811f781011"
);
t!("__ZN38_$LT$core..option..Option$LT$T$GT$$GT$6unwrap18_MSG_FILE_LINE_COL17haf7cb8d5824ee659E", "<core::option::Option<T>>::unwrap::_MSG_FILE_LINE_COL::haf7cb8d5824ee659");
t!("__ZN4core5slice89_$LT$impl$u20$core..iter..traits..IntoIterator$u20$for$u20$$RF$$u27$a$u20$$u5b$T$u5d$$GT$9into_iter17h450e234d27262170E", "core::slice::<impl core::iter::traits::IntoIterator for &'a [T]>::into_iter::h450e234d27262170");
}
#[test]
fn demangle_windows() {
t!("ZN4testE", "test");
t!("ZN13test$u20$test4foobE", "test test::foob");
t!("ZN12test$RF$test4foobE", "test&test::foob");
}
#[test]
fn demangle_elements_beginning_with_underscore() {
t!("_ZN13_$LT$test$GT$E", "<test>");
t!("_ZN28_$u7b$$u7b$closure$u7d$$u7d$E", "{{closure}}");
t!("_ZN15__STATIC_FMTSTRE", "__STATIC_FMTSTR");
}
#[test]
fn demangle_trait_impls() {
t!(
"_ZN71_$LT$Test$u20$$u2b$$u20$$u27$static$u20$as$u20$foo..Bar$LT$Test$GT$$GT$3barE",
"<Test + 'static as foo::Bar<Test>>::bar"
);
}
#[test]
fn demangle_without_hash() {
let s = "_ZN3foo17h05af221e174051e9E";
t!(s, "foo::h05af221e174051e9");
t_nohash!(s, "foo");
}
#[test]
fn demangle_without_hash_edgecases() {
// One element, no hash.
t_nohash!("_ZN3fooE", "foo");
// Two elements, no hash.
t_nohash!("_ZN3foo3barE", "foo::bar");
// Longer-than-normal hash.
t_nohash!("_ZN3foo20h05af221e174051e9abcE", "foo");
// Shorter-than-normal hash.
t_nohash!("_ZN3foo5h05afE", "foo");
// Valid hash, but not at the end.
t_nohash!("_ZN17h05af221e174051e93fooE", "h05af221e174051e9::foo");
// Not a valid hash, missing the 'h'.
t_nohash!("_ZN3foo16ffaf221e174051e9E", "foo::ffaf221e174051e9");
// Not a valid hash, has a non-hex-digit.
t_nohash!("_ZN3foo17hg5af221e174051e9E", "foo::hg5af221e174051e9");
}
#[test]
fn demangle_thinlto() {
// One element, no hash.
t!("_ZN3fooE.llvm.9D1C9369", "foo");
t!("_ZN3fooE.llvm.9D1C9369@@16", "foo");
t_nohash!(
"_ZN9backtrace3foo17hbb467fcdaea5d79bE.llvm.A5310EB9",
"backtrace::foo"
);
}
#[test]
fn demangle_llvm_ir_branch_labels() {
t!("_ZN4core5slice77_$LT$impl$u20$core..ops..index..IndexMut$LT$I$GT$$u20$for$u20$$u5b$T$u5d$$GT$9index_mut17haf9727c2edfbc47bE.exit.i.i", "core::slice::<impl core::ops::index::IndexMut<I> for [T]>::index_mut::haf9727c2edfbc47b.exit.i.i");
t_nohash!("_ZN4core5slice77_$LT$impl$u20$core..ops..index..IndexMut$LT$I$GT$$u20$for$u20$$u5b$T$u5d$$GT$9index_mut17haf9727c2edfbc47bE.exit.i.i", "core::slice::<impl core::ops::index::IndexMut<I> for [T]>::index_mut.exit.i.i");
}
#[test]
fn demangle_ignores_suffix_that_doesnt_look_like_a_symbol() {
t_err!("_ZN3fooE.llvm moocow");
}
#[test]
fn dont_panic() {
::demangle("_ZN2222222222222222222222EE").to_string();
::demangle("_ZN5*70527e27.ll34csaғE").to_string();
::demangle("_ZN5*70527a54.ll34_$b.1E").to_string();
::demangle(
"\
_ZN5~saäb4e\n\
2734cOsbE\n\
5usage20h)3\0\0\0\0\0\0\07e2734cOsbE\
",
)
.to_string();
}
#[test]
fn invalid_no_chop() {
t_err!("_ZNfooE");
}
#[test]
fn handle_assoc_types() {
t!("_ZN151_$LT$alloc..boxed..Box$LT$alloc..boxed..FnBox$LT$A$C$$u20$Output$u3d$R$GT$$u20$$u2b$$u20$$u27$a$GT$$u20$as$u20$core..ops..function..FnOnce$LT$A$GT$$GT$9call_once17h69e8f44b3723e1caE", "<alloc::boxed::Box<alloc::boxed::FnBox<A, Output=R> + 'a> as core::ops::function::FnOnce<A>>::call_once::h69e8f44b3723e1ca");
}
#[test]
fn handle_bang() {
t!(
"_ZN88_$LT$core..result..Result$LT$$u21$$C$$u20$E$GT$$u20$as$u20$std..process..Termination$GT$6report17hfc41d0da4a40b3e8E",
"<core::result::Result<!, E> as std::process::Termination>::report::hfc41d0da4a40b3e8"
);
}
#[test]
fn demangle_utf8_idents() {
t_nohash!(
"_ZN11utf8_idents157_$u10e1$$u10d0$$u10ed$$u10db$$u10d4$$u10da$$u10d0$$u10d3$_$u10d2$$u10d4$$u10db$$u10e0$$u10d8$$u10d4$$u10da$$u10d8$_$u10e1$$u10d0$$u10d3$$u10d8$$u10da$$u10d8$17h21634fd5714000aaE",
"utf8_idents::საჭმელად_გემრიელი_სადილი"
);
}
#[test]
fn demangle_issue_60925() {
t_nohash!(
"_ZN11issue_609253foo37Foo$LT$issue_60925..llv$u6d$..Foo$GT$3foo17h059a991a004536adE",
"issue_60925::foo::Foo<issue_60925::llvm::Foo>::foo"
);
}
}

588
vendor/rustc-demangle/src/lib.rs vendored Normal file
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@ -0,0 +1,588 @@
//! Demangle Rust compiler symbol names.
//!
//! This crate provides a `demangle` function which will return a `Demangle`
//! sentinel value that can be used to learn about the demangled version of a
//! symbol name. The demangled representation will be the same as the original
//! if it doesn't look like a mangled symbol name.
//!
//! `Demangle` can be formatted with the `Display` trait. The alternate
//! modifier (`#`) can be used to format the symbol name without the
//! trailing hash value.
//!
//! # Examples
//!
//! ```
//! use rustc_demangle::demangle;
//!
//! assert_eq!(demangle("_ZN4testE").to_string(), "test");
//! assert_eq!(demangle("_ZN3foo3barE").to_string(), "foo::bar");
//! assert_eq!(demangle("foo").to_string(), "foo");
//! // With hash
//! assert_eq!(format!("{}", demangle("_ZN3foo17h05af221e174051e9E")), "foo::h05af221e174051e9");
//! // Without hash
//! assert_eq!(format!("{:#}", demangle("_ZN3foo17h05af221e174051e9E")), "foo");
//! ```
#![no_std]
#![deny(missing_docs)]
#![cfg_attr(docsrs, feature(doc_cfg))]
#[cfg(any(test, feature = "std"))]
#[macro_use]
extern crate std;
// HACK(eddyb) helper macros for tests.
#[cfg(test)]
macro_rules! assert_contains {
($s:expr, $needle:expr) => {{
let (s, needle) = ($s, $needle);
assert!(
s.contains(needle),
"{:?} should've contained {:?}",
s,
needle
);
}};
}
#[cfg(test)]
macro_rules! assert_ends_with {
($s:expr, $suffix:expr) => {{
let (s, suffix) = ($s, $suffix);
assert!(
s.ends_with(suffix),
"{:?} should've ended in {:?}",
s,
suffix
);
}};
}
mod legacy;
mod v0;
use core::fmt::{self, Write as _};
/// Representation of a demangled symbol name.
pub struct Demangle<'a> {
style: Option<DemangleStyle<'a>>,
original: &'a str,
suffix: &'a str,
}
enum DemangleStyle<'a> {
Legacy(legacy::Demangle<'a>),
V0(v0::Demangle<'a>),
}
/// De-mangles a Rust symbol into a more readable version
///
/// This function will take a **mangled** symbol and return a value. When printed,
/// the de-mangled version will be written. If the symbol does not look like
/// a mangled symbol, the original value will be written instead.
///
/// # Examples
///
/// ```
/// use rustc_demangle::demangle;
///
/// assert_eq!(demangle("_ZN4testE").to_string(), "test");
/// assert_eq!(demangle("_ZN3foo3barE").to_string(), "foo::bar");
/// assert_eq!(demangle("foo").to_string(), "foo");
/// ```
pub fn demangle(mut s: &str) -> Demangle {
// During ThinLTO LLVM may import and rename internal symbols, so strip out
// those endings first as they're one of the last manglings applied to symbol
// names.
let llvm = ".llvm.";
if let Some(i) = s.find(llvm) {
let candidate = &s[i + llvm.len()..];
let all_hex = candidate.chars().all(|c| match c {
'A'..='F' | '0'..='9' | '@' => true,
_ => false,
});
if all_hex {
s = &s[..i];
}
}
let mut suffix = "";
let mut style = match legacy::demangle(s) {
Ok((d, s)) => {
suffix = s;
Some(DemangleStyle::Legacy(d))
}
Err(()) => match v0::demangle(s) {
Ok((d, s)) => {
suffix = s;
Some(DemangleStyle::V0(d))
}
// FIXME(eddyb) would it make sense to treat an unknown-validity
// symbol (e.g. one that errored with `RecursedTooDeep`) as
// v0-mangled, and have the error show up in the demangling?
// (that error already gets past this initial check, and therefore
// will show up in the demangling, if hidden behind a backref)
Err(v0::ParseError::Invalid) | Err(v0::ParseError::RecursedTooDeep) => None,
},
};
// Output like LLVM IR adds extra period-delimited words. See if
// we are in that case and save the trailing words if so.
if !suffix.is_empty() {
if suffix.starts_with('.') && is_symbol_like(suffix) {
// Keep the suffix.
} else {
// Reset the suffix and invalidate the demangling.
suffix = "";
style = None;
}
}
Demangle {
style,
original: s,
suffix,
}
}
#[cfg(feature = "std")]
fn demangle_line(
line: &str,
output: &mut impl std::io::Write,
include_hash: bool,
) -> std::io::Result<()> {
let mut head = 0;
while head < line.len() {
// Move to the next potential match
let next_head = match (line[head..].find("_ZN"), line[head..].find("_R")) {
(Some(idx), None) | (None, Some(idx)) => head + idx,
(Some(idx1), Some(idx2)) => head + idx1.min(idx2),
(None, None) => {
// No more matches...
line.len()
}
};
output.write_all(line[head..next_head].as_bytes())?;
head = next_head;
// Find the non-matching character.
//
// If we do not find a character, then until the end of the line is the
// thing to demangle.
let match_end = line[head..]
.find(|ch: char| !(ch == '$' || ch == '.' || ch == '_' || ch.is_ascii_alphanumeric()))
.map(|idx| head + idx)
.unwrap_or(line.len());
let mangled = &line[head..match_end];
head = head + mangled.len();
if let Ok(demangled) = try_demangle(mangled) {
if include_hash {
write!(output, "{}", demangled)?;
} else {
write!(output, "{:#}", demangled)?;
}
} else {
output.write_all(mangled.as_bytes())?;
}
}
Ok(())
}
/// Process a stream of data from `input` into the provided `output`, demangling any symbols found
/// within.
///
/// Note that the underlying implementation will perform many relatively small writes to the
/// output. If the output is expensive to write to (e.g., requires syscalls), consider using
/// `std::io::BufWriter`.
#[cfg(feature = "std")]
#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
pub fn demangle_stream<R: std::io::BufRead, W: std::io::Write>(
input: &mut R,
output: &mut W,
include_hash: bool,
) -> std::io::Result<()> {
let mut buf = std::string::String::new();
// We read in lines to reduce the memory usage at any time.
//
// demangle_line is also more efficient with relatively small buffers as it will copy around
// trailing data during demangling. In the future we might directly stream to the output but at
// least right now that seems to be less efficient.
while input.read_line(&mut buf)? > 0 {
demangle_line(&buf, output, include_hash)?;
buf.clear();
}
Ok(())
}
/// Error returned from the `try_demangle` function below when demangling fails.
#[derive(Debug, Clone)]
pub struct TryDemangleError {
_priv: (),
}
/// The same as `demangle`, except return an `Err` if the string does not appear
/// to be a Rust symbol, rather than "demangling" the given string as a no-op.
///
/// ```
/// extern crate rustc_demangle;
///
/// let not_a_rust_symbol = "la la la";
///
/// // The `try_demangle` function will reject strings which are not Rust symbols.
/// assert!(rustc_demangle::try_demangle(not_a_rust_symbol).is_err());
///
/// // While `demangle` will just pass the non-symbol through as a no-op.
/// assert_eq!(rustc_demangle::demangle(not_a_rust_symbol).as_str(), not_a_rust_symbol);
/// ```
pub fn try_demangle(s: &str) -> Result<Demangle, TryDemangleError> {
let sym = demangle(s);
if sym.style.is_some() {
Ok(sym)
} else {
Err(TryDemangleError { _priv: () })
}
}
impl<'a> Demangle<'a> {
/// Returns the underlying string that's being demangled.
pub fn as_str(&self) -> &'a str {
self.original
}
}
fn is_symbol_like(s: &str) -> bool {
s.chars().all(|c| {
// Once `char::is_ascii_punctuation` and `char::is_ascii_alphanumeric`
// have been stable for long enough, use those instead for clarity
is_ascii_alphanumeric(c) || is_ascii_punctuation(c)
})
}
// Copied from the documentation of `char::is_ascii_alphanumeric`
fn is_ascii_alphanumeric(c: char) -> bool {
match c {
'\u{0041}'..='\u{005A}' | '\u{0061}'..='\u{007A}' | '\u{0030}'..='\u{0039}' => true,
_ => false,
}
}
// Copied from the documentation of `char::is_ascii_punctuation`
fn is_ascii_punctuation(c: char) -> bool {
match c {
'\u{0021}'..='\u{002F}'
| '\u{003A}'..='\u{0040}'
| '\u{005B}'..='\u{0060}'
| '\u{007B}'..='\u{007E}' => true,
_ => false,
}
}
impl<'a> fmt::Display for DemangleStyle<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
DemangleStyle::Legacy(ref d) => fmt::Display::fmt(d, f),
DemangleStyle::V0(ref d) => fmt::Display::fmt(d, f),
}
}
}
// Maximum size of the symbol that we'll print.
const MAX_SIZE: usize = 1_000_000;
#[derive(Copy, Clone, Debug)]
struct SizeLimitExhausted;
struct SizeLimitedFmtAdapter<F> {
remaining: Result<usize, SizeLimitExhausted>,
inner: F,
}
impl<F: fmt::Write> fmt::Write for SizeLimitedFmtAdapter<F> {
fn write_str(&mut self, s: &str) -> fmt::Result {
self.remaining = self
.remaining
.and_then(|r| r.checked_sub(s.len()).ok_or(SizeLimitExhausted));
match self.remaining {
Ok(_) => self.inner.write_str(s),
Err(SizeLimitExhausted) => Err(fmt::Error),
}
}
}
impl<'a> fmt::Display for Demangle<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self.style {
None => f.write_str(self.original)?,
Some(ref d) => {
let alternate = f.alternate();
let mut size_limited_fmt = SizeLimitedFmtAdapter {
remaining: Ok(MAX_SIZE),
inner: &mut *f,
};
let fmt_result = if alternate {
write!(size_limited_fmt, "{:#}", d)
} else {
write!(size_limited_fmt, "{}", d)
};
let size_limit_result = size_limited_fmt.remaining.map(|_| ());
// Translate a `fmt::Error` generated by `SizeLimitedFmtAdapter`
// into an error message, instead of propagating it upwards
// (which could cause panicking from inside e.g. `std::io::print`).
match (fmt_result, size_limit_result) {
(Err(_), Err(SizeLimitExhausted)) => f.write_str("{size limit reached}")?,
_ => {
fmt_result?;
size_limit_result
.expect("`fmt::Error` from `SizeLimitedFmtAdapter` was discarded");
}
}
}
}
f.write_str(self.suffix)
}
}
impl<'a> fmt::Debug for Demangle<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(self, f)
}
}
#[cfg(test)]
mod tests {
use std::prelude::v1::*;
macro_rules! t {
($a:expr, $b:expr) => {
assert!(ok($a, $b))
};
}
macro_rules! t_err {
($a:expr) => {
assert!(ok_err($a))
};
}
macro_rules! t_nohash {
($a:expr, $b:expr) => {{
assert_eq!(format!("{:#}", super::demangle($a)), $b);
}};
}
fn ok(sym: &str, expected: &str) -> bool {
match super::try_demangle(sym) {
Ok(s) => {
if s.to_string() == expected {
true
} else {
println!("\n{}\n!=\n{}\n", s, expected);
false
}
}
Err(_) => {
println!("error demangling");
false
}
}
}
fn ok_err(sym: &str) -> bool {
match super::try_demangle(sym) {
Ok(_) => {
println!("succeeded in demangling");
false
}
Err(_) => super::demangle(sym).to_string() == sym,
}
}
#[test]
fn demangle() {
t_err!("test");
t!("_ZN4testE", "test");
t_err!("_ZN4test");
t!("_ZN4test1a2bcE", "test::a::bc");
}
#[test]
fn demangle_dollars() {
t!("_ZN4$RP$E", ")");
t!("_ZN8$RF$testE", "&test");
t!("_ZN8$BP$test4foobE", "*test::foob");
t!("_ZN9$u20$test4foobE", " test::foob");
t!("_ZN35Bar$LT$$u5b$u32$u3b$$u20$4$u5d$$GT$E", "Bar<[u32; 4]>");
}
#[test]
fn demangle_many_dollars() {
t!("_ZN13test$u20$test4foobE", "test test::foob");
t!("_ZN12test$BP$test4foobE", "test*test::foob");
}
#[test]
fn demangle_osx() {
t!(
"__ZN5alloc9allocator6Layout9for_value17h02a996811f781011E",
"alloc::allocator::Layout::for_value::h02a996811f781011"
);
t!("__ZN38_$LT$core..option..Option$LT$T$GT$$GT$6unwrap18_MSG_FILE_LINE_COL17haf7cb8d5824ee659E", "<core::option::Option<T>>::unwrap::_MSG_FILE_LINE_COL::haf7cb8d5824ee659");
t!("__ZN4core5slice89_$LT$impl$u20$core..iter..traits..IntoIterator$u20$for$u20$$RF$$u27$a$u20$$u5b$T$u5d$$GT$9into_iter17h450e234d27262170E", "core::slice::<impl core::iter::traits::IntoIterator for &'a [T]>::into_iter::h450e234d27262170");
}
#[test]
fn demangle_windows() {
t!("ZN4testE", "test");
t!("ZN13test$u20$test4foobE", "test test::foob");
t!("ZN12test$RF$test4foobE", "test&test::foob");
}
#[test]
fn demangle_elements_beginning_with_underscore() {
t!("_ZN13_$LT$test$GT$E", "<test>");
t!("_ZN28_$u7b$$u7b$closure$u7d$$u7d$E", "{{closure}}");
t!("_ZN15__STATIC_FMTSTRE", "__STATIC_FMTSTR");
}
#[test]
fn demangle_trait_impls() {
t!(
"_ZN71_$LT$Test$u20$$u2b$$u20$$u27$static$u20$as$u20$foo..Bar$LT$Test$GT$$GT$3barE",
"<Test + 'static as foo::Bar<Test>>::bar"
);
}
#[test]
fn demangle_without_hash() {
let s = "_ZN3foo17h05af221e174051e9E";
t!(s, "foo::h05af221e174051e9");
t_nohash!(s, "foo");
}
#[test]
fn demangle_without_hash_edgecases() {
// One element, no hash.
t_nohash!("_ZN3fooE", "foo");
// Two elements, no hash.
t_nohash!("_ZN3foo3barE", "foo::bar");
// Longer-than-normal hash.
t_nohash!("_ZN3foo20h05af221e174051e9abcE", "foo");
// Shorter-than-normal hash.
t_nohash!("_ZN3foo5h05afE", "foo");
// Valid hash, but not at the end.
t_nohash!("_ZN17h05af221e174051e93fooE", "h05af221e174051e9::foo");
// Not a valid hash, missing the 'h'.
t_nohash!("_ZN3foo16ffaf221e174051e9E", "foo::ffaf221e174051e9");
// Not a valid hash, has a non-hex-digit.
t_nohash!("_ZN3foo17hg5af221e174051e9E", "foo::hg5af221e174051e9");
}
#[test]
fn demangle_thinlto() {
// One element, no hash.
t!("_ZN3fooE.llvm.9D1C9369", "foo");
t!("_ZN3fooE.llvm.9D1C9369@@16", "foo");
t_nohash!(
"_ZN9backtrace3foo17hbb467fcdaea5d79bE.llvm.A5310EB9",
"backtrace::foo"
);
}
#[test]
fn demangle_llvm_ir_branch_labels() {
t!("_ZN4core5slice77_$LT$impl$u20$core..ops..index..IndexMut$LT$I$GT$$u20$for$u20$$u5b$T$u5d$$GT$9index_mut17haf9727c2edfbc47bE.exit.i.i", "core::slice::<impl core::ops::index::IndexMut<I> for [T]>::index_mut::haf9727c2edfbc47b.exit.i.i");
t_nohash!("_ZN4core5slice77_$LT$impl$u20$core..ops..index..IndexMut$LT$I$GT$$u20$for$u20$$u5b$T$u5d$$GT$9index_mut17haf9727c2edfbc47bE.exit.i.i", "core::slice::<impl core::ops::index::IndexMut<I> for [T]>::index_mut.exit.i.i");
}
#[test]
fn demangle_ignores_suffix_that_doesnt_look_like_a_symbol() {
t_err!("_ZN3fooE.llvm moocow");
}
#[test]
fn dont_panic() {
super::demangle("_ZN2222222222222222222222EE").to_string();
super::demangle("_ZN5*70527e27.ll34csaғE").to_string();
super::demangle("_ZN5*70527a54.ll34_$b.1E").to_string();
super::demangle(
"\
_ZN5~saäb4e\n\
2734cOsbE\n\
5usage20h)3\0\0\0\0\0\0\07e2734cOsbE\
",
)
.to_string();
}
#[test]
fn invalid_no_chop() {
t_err!("_ZNfooE");
}
#[test]
fn handle_assoc_types() {
t!("_ZN151_$LT$alloc..boxed..Box$LT$alloc..boxed..FnBox$LT$A$C$$u20$Output$u3d$R$GT$$u20$$u2b$$u20$$u27$a$GT$$u20$as$u20$core..ops..function..FnOnce$LT$A$GT$$GT$9call_once17h69e8f44b3723e1caE", "<alloc::boxed::Box<alloc::boxed::FnBox<A, Output=R> + 'a> as core::ops::function::FnOnce<A>>::call_once::h69e8f44b3723e1ca");
}
#[test]
fn handle_bang() {
t!(
"_ZN88_$LT$core..result..Result$LT$$u21$$C$$u20$E$GT$$u20$as$u20$std..process..Termination$GT$6report17hfc41d0da4a40b3e8E",
"<core::result::Result<!, E> as std::process::Termination>::report::hfc41d0da4a40b3e8"
);
}
#[test]
fn limit_recursion() {
assert_contains!(
super::demangle("_RNvB_1a").to_string(),
"{recursion limit reached}"
);
assert_contains!(
super::demangle("_RMC0RB2_").to_string(),
"{recursion limit reached}"
);
}
#[test]
fn limit_output() {
assert_ends_with!(
super::demangle("RYFG_FGyyEvRYFF_EvRYFFEvERLB_B_B_ERLRjB_B_B_").to_string(),
"{size limit reached}"
);
// NOTE(eddyb) somewhat reduced version of the above, effectively
// `<for<...> fn()>` with a larger number of lifetimes in `...`.
assert_ends_with!(
super::demangle("_RMC0FGZZZ_Eu").to_string(),
"{size limit reached}"
);
}
#[cfg(feature = "std")]
fn demangle_str(input: &str) -> String {
let mut output = Vec::new();
super::demangle_line(input, &mut output, false);
String::from_utf8(output).unwrap()
}
#[test]
#[cfg(feature = "std")]
fn find_multiple() {
assert_eq!(
demangle_str("_ZN3fooE.llvm moocow _ZN3fooE.llvm"),
"foo.llvm moocow foo.llvm"
);
}
#[test]
#[cfg(feature = "std")]
fn interleaved_new_legacy() {
assert_eq!(
demangle_str("_ZN3fooE.llvm moocow _RNvMNtNtNtNtCs8a2262Dv4r_3mio3sys4unix8selector5epollNtB2_8Selector6select _ZN3fooE.llvm"),
"foo.llvm moocow <mio::sys::unix::selector::epoll::Selector>::select foo.llvm"
);
}
}

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