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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
#![allow(clippy::undocumented_unsafe_blocks)] // Remove me if you dare
use std::{
ffi::CStr,
io, mem,
os::windows::io::{AsRawHandle, FromRawHandle, OwnedHandle, RawHandle},
};
use windows_sys::Win32::{
Foundation::{ERROR_NO_MORE_FILES, INVALID_HANDLE_VALUE},
System::Diagnostics::ToolHelp::{
CreateToolhelp32Snapshot, MODULEENTRY32, Module32First, Module32Next, PROCESSENTRY32W,
Process32FirstW, Process32NextW,
},
};
/// A snapshot of process modules, threads, and heaps
pub struct ProcessSnapshot {
handle: OwnedHandle,
}
impl ProcessSnapshot {
/// Create a new process snapshot using `CreateToolhelp32Snapshot`
pub fn new(flags: u32, process_id: u32) -> io::Result<ProcessSnapshot> {
// SAFETY: `CreateToolhelp32Snapshot` should handle invalid flags and process IDs
let snap = unsafe { CreateToolhelp32Snapshot(flags, process_id) };
if snap == INVALID_HANDLE_VALUE {
Err(io::Error::last_os_error())
} else {
Ok(ProcessSnapshot {
// SAFETY: `snap` is a valid handle since `CreateToolhelp32Snapshot` succeeded
handle: unsafe { OwnedHandle::from_raw_handle(snap) },
})
}
}
/// Return an iterator over the modules in the snapshot
pub fn modules(&self) -> ProcessSnapshotModules<'_> {
let entry = MODULEENTRY32 {
dwSize: mem::size_of::<MODULEENTRY32>() as u32,
..Default::default()
};
ProcessSnapshotModules {
snapshot: self,
iter_started: false,
temp_entry: entry,
}
}
/// Return an iterator over the processes in the snapshot
pub fn processes(&self) -> ProcessSnapshotEntries<'_> {
let entry = PROCESSENTRY32W {
dwSize: mem::size_of::<PROCESSENTRY32W>() as u32,
..Default::default()
};
ProcessSnapshotEntries {
snapshot: self,
iter_started: false,
temp_entry: entry,
}
}
}
impl AsRawHandle for ProcessSnapshot {
fn as_raw_handle(&self) -> RawHandle {
self.handle.as_raw_handle()
}
}
/// Description of a snapshot module entry. See `MODULEENTRY32`
pub struct ModuleEntry {
/// Module name
pub name: String,
/// Module base address (in the owning process)
pub base_address: *const u8,
/// Size of the module (in bytes)
pub size: usize,
}
/// Module iterator for [ProcessSnapshot]
pub struct ProcessSnapshotModules<'a> {
snapshot: &'a ProcessSnapshot,
iter_started: bool,
temp_entry: MODULEENTRY32,
}
impl Iterator for ProcessSnapshotModules<'_> {
type Item = io::Result<ModuleEntry>;
fn next(&mut self) -> Option<io::Result<ModuleEntry>> {
if self.iter_started {
// SAFETY: `self.snapshot` is a valid pointer, and `temp_entry` is a valid `MODULEENTRY32`
if unsafe { Module32Next(self.snapshot.as_raw_handle(), &mut self.temp_entry) } == 0 {
let last_error = io::Error::last_os_error();
return if last_error.raw_os_error().unwrap() as u32 == ERROR_NO_MORE_FILES {
None
} else {
Some(Err(last_error))
};
}
} else {
// SAFETY: `self.snapshot` is a valid pointer, and `temp_entry` is a valid `MODULEENTRY32`
if unsafe { Module32First(self.snapshot.as_raw_handle(), &mut self.temp_entry) } == 0 {
return Some(Err(io::Error::last_os_error()));
}
self.iter_started = true;
}
let cstr_ref = &self.temp_entry.szModule[0];
// SAFETY: `szModule` is a null-terminated C string
let cstr = unsafe { CStr::from_ptr(cstr_ref) };
Some(Ok(ModuleEntry {
name: cstr.to_string_lossy().into_owned(),
base_address: self.temp_entry.modBaseAddr,
size: self.temp_entry.modBaseSize as usize,
}))
}
}
/// Description of a snapshot process entry. See `PROCESSENTRY32W`
pub struct ProcessEntry {
/// Process identifier
pub pid: u32,
/// Process identifier of the parent process
pub parent_pid: u32,
}
/// Process iterator for [ProcessSnapshot]
pub struct ProcessSnapshotEntries<'a> {
snapshot: &'a ProcessSnapshot,
iter_started: bool,
temp_entry: PROCESSENTRY32W,
}
impl Iterator for ProcessSnapshotEntries<'_> {
type Item = io::Result<ProcessEntry>;
fn next(&mut self) -> Option<io::Result<ProcessEntry>> {
if self.iter_started {
// SAFETY: `self.snapshot` is a valid pointer, and `temp_entry` is a valid `PROCESSENTRY32W`
if unsafe { Process32NextW(self.snapshot.as_raw_handle(), &mut self.temp_entry) } == 0 {
let last_error = io::Error::last_os_error();
return if last_error.raw_os_error().unwrap() as u32 == ERROR_NO_MORE_FILES {
None
} else {
Some(Err(last_error))
};
}
} else {
// SAFETY: `self.snapshot` is a valid pointer, and `temp_entry` is a valid `PROCESSENTRY32W`
if unsafe { Process32FirstW(self.snapshot.as_raw_handle(), &mut self.temp_entry) } == 0
{
return Some(Err(io::Error::last_os_error()));
}
self.iter_started = true;
}
Some(Ok(ProcessEntry {
pid: self.temp_entry.th32ProcessID,
parent_pid: self.temp_entry.th32ParentProcessID,
}))
}
}
|
