Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Update to match rust-lang/rust#36059 #4

Merged
merged 1 commit into from
Sep 26, 2016
Merged

Update to match rust-lang/rust#36059 #4

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
92 changes: 63 additions & 29 deletions src/lib.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -76,12 +76,12 @@ pub fn demangle(s: &str) -> Demangle {
// symbols because we could have any function in the backtrace.
let mut valid = true;
let mut inner = s;
if s.len() > 4 && s.starts_with("_ZN") && s.ends_with("E") {
inner = &s[3 .. s.len() - 1];
// On Windows, dbghelp strips leading underscores, so we accept "ZN...E"
// form too.
} else if s.len() > 3 && s.starts_with("ZN") && s.ends_with("E") {
inner = &s[2 .. s.len() - 1];
if s.len() > 4 && s.starts_with("_ZN") && s.ends_with('E') {
inner = &s[3..s.len() - 1];
} else if s.len() > 3 && s.starts_with("ZN") && s.ends_with('E') {
// On Windows, dbghelp strips leading underscores, so we accept "ZN...E"
// form too.
inner = &s[2..s.len() - 1];
} else {
valid = false;
}
Expand All @@ -94,19 +94,23 @@ pub fn demangle(s: &str) -> Demangle {
if c.is_digit(10) {
i = i * 10 + c as usize - '0' as usize;
} else {
break
break;
}
}
if i == 0 {
valid = chars.next().is_none();
break
break;
} else if chars.by_ref().take(i - 1).count() != i - 1 {
valid = false;
}
}
}

Demangle { inner: inner, valid: valid, original: s }
Demangle {
inner: inner,
valid: valid,
original: s,
}
}

impl<'a> Demangle<'a> {
Expand Down Expand Up @@ -138,10 +142,21 @@ impl<'a> fmt::Display for Demangle<'a> {
let i: usize = inner[..(inner.len() - rest.len())].parse().unwrap();
inner = &rest[i..];
rest = &rest[..i];
if rest.starts_with("_$") {
rest = &rest[1..];
}
while !rest.is_empty() {
if rest.starts_with("$") {
if rest.starts_with('.') {
if let Some('.') = rest[1..].chars().next() {
try!(f.write_str("::"));
rest = &rest[2..];
} else {
try!(f.write_str("."));
rest = &rest[1..];
}
} else if rest.starts_with('$') {
macro_rules! demangle {
($($pat:expr, => $demangled:expr),*) => ({
($($pat:expr => $demangled:expr),*) => ({
$(if rest.starts_with($pat) {
try!(f.write_str($demangled));
rest = &rest[$pat.len()..];
Expand All @@ -154,30 +169,35 @@ impl<'a> fmt::Display for Demangle<'a> {
})
}

// see src/librustc_trans/back/symbol_names.rs for these
// mappings, historical ones also included.
// see src/librustc/back/link.rs for these mappings
demangle! {
"$SP$", => "@",
"$BP$", => "*",
"$RF$", => "&",
"$LT$", => "<",
"$GT$", => ">",
"$LP$", => "(",
"$RP$", => ")",
"$C$", => ",",
"$SP$" => "@",
"$BP$" => "*",
"$RF$" => "&",
"$LT$" => "<",
"$GT$" => ">",
"$LP$" => "(",
"$RP$" => ")",
"$C$" => ",",

// in theory we can demangle any Unicode code point, but
// for simplicity we just catch the common ones.
"$u7e$", => "~",
"$u20$", => " ",
"$u27$", => "'",
"$u5b$", => "[",
"$u5d$", => "]",
"$u7b$", => "{",
"$u7d$", => "}"
"$u7e$" => "~",
"$u20$" => " ",
"$u27$" => "'",
"$u5b$" => "[",
"$u5d$" => "]",
"$u7b$" => "{",
"$u7d$" => "}",
"$u3b$" => ";",
"$u2b$" => "+",
"$u22$" => "\""
}
} else {
let idx = rest.find('$').unwrap_or(rest.len());
let idx = match rest.char_indices().find(|&(_, c)| c == '$' || c == '.') {
None => rest.len(),
Some((i, _)) => i,
};
try!(f.write_str(&rest[..idx]));
rest = &rest[idx..];
}
Expand Down Expand Up @@ -218,6 +238,7 @@ mod tests {
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]
Expand All @@ -232,4 +253,17 @@ mod tests {
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");
}
}