summaryrefslogtreecommitdiffstats
path: root/vendor/gimli/src/read/pubnames.rs
blob: e8b7e5528633fcf908508cb86c72467a1d00ac3d (plain)
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
use crate::common::{DebugInfoOffset, SectionId};
use crate::endianity::Endianity;
use crate::read::lookup::{DebugLookup, LookupEntryIter, PubStuffEntry, PubStuffParser};
use crate::read::{EndianSlice, Reader, Result, Section, UnitOffset};

/// A single parsed pubname.
#[derive(Debug, Clone)]
pub struct PubNamesEntry<R: Reader> {
    unit_header_offset: DebugInfoOffset<R::Offset>,
    die_offset: UnitOffset<R::Offset>,
    name: R,
}

impl<R: Reader> PubNamesEntry<R> {
    /// Returns the name this entry refers to.
    pub fn name(&self) -> &R {
        &self.name
    }

    /// Returns the offset into the .debug_info section for the header of the compilation unit
    /// which contains this name.
    pub fn unit_header_offset(&self) -> DebugInfoOffset<R::Offset> {
        self.unit_header_offset
    }

    /// Returns the offset into the compilation unit for the debugging information entry which
    /// has this name.
    pub fn die_offset(&self) -> UnitOffset<R::Offset> {
        self.die_offset
    }
}

impl<R: Reader> PubStuffEntry<R> for PubNamesEntry<R> {
    fn new(
        die_offset: UnitOffset<R::Offset>,
        name: R,
        unit_header_offset: DebugInfoOffset<R::Offset>,
    ) -> Self {
        PubNamesEntry {
            unit_header_offset,
            die_offset,
            name,
        }
    }
}

/// The `DebugPubNames` struct represents the DWARF public names information
/// found in the `.debug_pubnames` section.
#[derive(Debug, Clone)]
pub struct DebugPubNames<R: Reader>(DebugLookup<R, PubStuffParser<R, PubNamesEntry<R>>>);

impl<'input, Endian> DebugPubNames<EndianSlice<'input, Endian>>
where
    Endian: Endianity,
{
    /// Construct a new `DebugPubNames` instance from the data in the `.debug_pubnames`
    /// section.
    ///
    /// It is the caller's responsibility to read the `.debug_pubnames` section and
    /// present it as a `&[u8]` slice. That means using some ELF loader on
    /// Linux, a Mach-O loader on macOS, etc.
    ///
    /// ```
    /// use gimli::{DebugPubNames, LittleEndian};
    ///
    /// # let buf = [];
    /// # let read_debug_pubnames_section_somehow = || &buf;
    /// let debug_pubnames =
    ///     DebugPubNames::new(read_debug_pubnames_section_somehow(), LittleEndian);
    /// ```
    pub fn new(debug_pubnames_section: &'input [u8], endian: Endian) -> Self {
        Self::from(EndianSlice::new(debug_pubnames_section, endian))
    }
}

impl<R: Reader> DebugPubNames<R> {
    /// Iterate the pubnames in the `.debug_pubnames` section.
    ///
    /// ```
    /// use gimli::{DebugPubNames, EndianSlice, LittleEndian};
    ///
    /// # let buf = [];
    /// # let read_debug_pubnames_section_somehow = || &buf;
    /// let debug_pubnames =
    ///     DebugPubNames::new(read_debug_pubnames_section_somehow(), LittleEndian);
    ///
    /// let mut iter = debug_pubnames.items();
    /// while let Some(pubname) = iter.next().unwrap() {
    ///   println!("pubname {} found!", pubname.name().to_string_lossy());
    /// }
    /// ```
    pub fn items(&self) -> PubNamesEntryIter<R> {
        PubNamesEntryIter(self.0.items())
    }
}

impl<R: Reader> Section<R> for DebugPubNames<R> {
    fn id() -> SectionId {
        SectionId::DebugPubNames
    }

    fn reader(&self) -> &R {
        self.0.reader()
    }
}

impl<R: Reader> From<R> for DebugPubNames<R> {
    fn from(debug_pubnames_section: R) -> Self {
        DebugPubNames(DebugLookup::from(debug_pubnames_section))
    }
}

/// An iterator over the pubnames from a `.debug_pubnames` section.
///
/// Can be [used with
/// `FallibleIterator`](./index.html#using-with-fallibleiterator).
#[derive(Debug, Clone)]
pub struct PubNamesEntryIter<R: Reader>(LookupEntryIter<R, PubStuffParser<R, PubNamesEntry<R>>>);

impl<R: Reader> PubNamesEntryIter<R> {
    /// Advance the iterator and return the next pubname.
    ///
    /// Returns the newly parsed pubname as `Ok(Some(pubname))`. Returns
    /// `Ok(None)` when iteration is complete and all pubnames have already been
    /// parsed and yielded. If an error occurs while parsing the next pubname,
    /// then this error is returned as `Err(e)`, and all subsequent calls return
    /// `Ok(None)`.
    pub fn next(&mut self) -> Result<Option<PubNamesEntry<R>>> {
        self.0.next()
    }
}

#[cfg(feature = "fallible-iterator")]
impl<R: Reader> fallible_iterator::FallibleIterator for PubNamesEntryIter<R> {
    type Item = PubNamesEntry<R>;
    type Error = crate::read::Error;

    fn next(&mut self) -> ::core::result::Result<Option<Self::Item>, Self::Error> {
        self.0.next()
    }
}