dotscope 0.6.0

A high-performance, cross-platform framework for analyzing and reverse engineering .NET PE executables
Documentation 
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

//! # `MethodSemantics` Table Loader
//!
//! This module provides the loader implementation for the [`MethodSemantics`](crate::metadata::tables::MethodSemantics) table,
//! which specifies the relationship between methods and events or properties in .NET metadata.
//! It defines which methods are getters, setters, adders, removers, etc.
//!
//! ## Purpose
//!
//! The [`MethodSemanticsLoader`] processes raw [`MethodSemanticsRaw`] entries during metadata loading,
//! converting them to owned [`MethodSemantics`](crate::metadata::tables::MethodSemantics) instances with resolved references and applying
//! the semantic relationships to the associated properties and events.
//!
//! ## Table Dependencies
//!
//! The `MethodSemantics` table depends on:
//! - [`Event`](crate::metadata::tables::Event) - For event semantic associations
//! - [`EventMap`](crate::metadata::tables::EventMap) - For event mapping resolution
//! - [`Property`](crate::metadata::tables::Property) - For property semantic associations  
//! - [`PropertyMap`](crate::metadata::tables::PropertyMap) - For property mapping resolution
//!
//! ## Error Conditions
//!
//! - Method references cannot be resolved
//! - Association coded indexes are malformed
//! - Semantic relationships conflict (e.g., duplicate setters)
//! - Required dependency tables are missing or malformed

use crate::{
    metadata::{
        diagnostics::DiagnosticCategory,
        loader::{LoaderContext, MetadataLoader},
        tables::MethodSemanticsRaw,
    },
    prelude::TableId,
    Result,
};

/// Loader implementation for the `MethodSemantics` metadata table.
///
/// This loader processes [`crate::metadata::tables::MethodSemanticsRaw`] entries, converting them to
/// owned [`crate::metadata::tables::MethodSemantics`] instances with resolved references and applying
/// semantic relationships to properties and events.
pub(crate) struct MethodSemanticsLoader;

impl MetadataLoader for MethodSemanticsLoader {
    /// Loads and processes all `MethodSemantics` table entries.
    ///
    /// ## Arguments
    /// * `context` - The loader context containing metadata tables and storage
    ///
    /// ## Errors
    ///
    /// - Method references cannot be resolved
    /// - Association coded indexes are malformed
    /// - Semantic relationships conflict (e.g., duplicate setters)
    /// - Required dependency tables are missing
    fn load(&self, context: &LoaderContext) -> Result<()> {
        let Some(header) = context.meta else {
            return Ok(());
        };
        let Some(table) = header.table::<MethodSemanticsRaw>() else {
            return Ok(());
        };

        table.par_iter().try_for_each(|row| {
            let token_msg = || format!("method semantics 0x{:08x}", row.token.value());

            let Some(owned) = context.handle_result(
                row.to_owned(
                    |coded_index| context.get_ref(coded_index),
                    context.method_def,
                ),
                DiagnosticCategory::Method,
                token_msg,
            )?
            else {
                return Ok(());
            };

            context.handle_error(owned.apply(), DiagnosticCategory::Method, token_msg)?;
            context.method_semantics.insert(row.token, owned);
            Ok(())
        })
    }

    /// Returns the table identifier for `MethodSemantics`.
    ///
    /// ## Returns
    /// [`crate::metadata::tables::TableId::MethodSemantics`] (0x18)
    fn table_id(&self) -> Option<TableId> {
        Some(TableId::MethodSemantics)
    }

    /// Returns the table dependencies for `MethodSemantics` loading.
    ///
    /// The `MethodSemantics` table requires these tables to be loaded first for proper
    /// association resolution:
    /// - [`Event`](crate::metadata::tables::TableId::Event) - For event semantic associations
    /// - [`EventMap`](crate::metadata::tables::TableId::EventMap) - For event mapping resolution
    /// - [`Property`](crate::metadata::tables::TableId::Property) - For property semantic associations
    /// - [`PropertyMap`](crate::metadata::tables::TableId::PropertyMap) - For property mapping resolution
    ///
    /// ## Returns
    /// Array of required [`crate::metadata::tables::TableId`] dependencies
    fn dependencies(&self) -> &'static [TableId] {
        &[
            TableId::Event,
            TableId::EventMap,
            TableId::Property,
            TableId::PropertyMap,
        ]
    }
}