Bug 1710097 - Use the memmap2 crate in place of the unmaintained memmap crate r=mstange

Differential Revision: https://phabricator.services.mozilla.com/D124653
This commit is contained in:
Gabriele Svelto 2021-09-10 19:46:14 +00:00
Родитель 212446b536
Коммит ef5658276d
14 изменённых файлов: 4 добавлений и 1939 удалений

12
Cargo.lock сгенерированный
Просмотреть файл

@ -2886,16 +2886,6 @@ version = "2.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b16bd47d9e329435e309c58469fe0791c2d0d1ba96ec0954152a5ae2b04387dc"
[[package]]
name = "memmap"
version = "0.7.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6585fd95e7bb50d6cc31e20d4cf9afb4e2ba16c5846fc76793f11218da9c475b"
dependencies = [
"libc",
"winapi",
]
[[package]]
name = "memmap2"
version = "0.2.3"
@ -3872,7 +3862,7 @@ name = "profiler_helper"
version = "0.1.0"
dependencies = [
"goblin",
"memmap",
"memmap2 0.3.0",
"object",
"rustc-demangle",
"thin-vec",

Просмотреть файл

@ -1 +0,0 @@
{"files":{"Cargo.toml":"4f6e813f7480758c57f9d180ade1276761a499245846fadb7a96a234342506ca","LICENSE-APACHE":"04ea4849dba9dcae07113850c6f1b1a69052c625210639914eee352023f750ad","LICENSE-MIT":"bd1d8f06a6ce1f7645991e347b95864b970eed43624305eb4bb78c09aef8692d","README.md":"193c46fdc56e4ca953ec7179bf4fd5f302b46557d86181b56b7d6294f25eaa96","ci/install.sh":"8841985e8645d391829ba52cd669bc5c5d98b1fdd8979c7cfd3cd3573c4a0a4b","ci/script.sh":"04127e49ac7346941f0a21d2e1a9177719e62f1e92755579c3601fc98e33006c","examples/cat.rs":"86cfee28482f92ea4c4ae4ebdff97d70fc095208cc5de09db39994118468d1ff","src/lib.rs":"82e116f2b1fbfc7e987a0dfde7e73e51b231f38f33b76369c6de0d46b63c60e1","src/unix.rs":"93fb4fe71dd04e2d1c5e1b6a285bce8b729456bdddbd758aa6768e8ab30ed143","src/windows.rs":"21566160bc1b2f2f82988b9e1274b3b700034cad0e5ca723695863a432da4896"},"package":"6585fd95e7bb50d6cc31e20d4cf9afb4e2ba16c5846fc76793f11218da9c475b"}

33
third_party/rust/memmap/Cargo.toml поставляемый
Просмотреть файл

@ -1,33 +0,0 @@
# 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 believe there's an error in this file please file an
# issue against the rust-lang/cargo repository. If you're
# editing this file be aware that the upstream Cargo.toml
# will likely look very different (and much more reasonable)
[package]
name = "memmap"
version = "0.7.0"
authors = ["Dan Burkert <dan@danburkert.com>"]
description = "Cross-platform Rust API for memory-mapped file IO"
documentation = "https://docs.rs/memmap"
keywords = ["mmap", "memory-map", "io", "file"]
license = "MIT/Apache-2.0"
repository = "https://github.com/danburkert/memmap-rs"
[dev-dependencies.tempdir]
version = "0.3"
[target."cfg(unix)".dependencies.libc]
version = "0.2"
[target."cfg(windows)".dependencies.winapi]
version = "0.3"
features = ["basetsd", "handleapi", "memoryapi", "minwindef", "std", "sysinfoapi"]
[badges.appveyor]
repository = "danburkert/mmap"
[badges.travis-ci]
repository = "danburkert/memmap-rs"

201
third_party/rust/memmap/LICENSE-APACHE поставляемый
Просмотреть файл

@ -1,201 +0,0 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [2015] [Dan Burkert]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

25
third_party/rust/memmap/LICENSE-MIT поставляемый
Просмотреть файл

@ -1,25 +0,0 @@
Copyright (c) 2015 Dan Burkert
Permission is hereby granted, free of charge, to any
person obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the
Software without restriction, including without
limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice
shall be included in all copies or substantial portions
of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

53
third_party/rust/memmap/README.md поставляемый
Просмотреть файл

@ -1,53 +0,0 @@
# memmap
A Rust library for cross-platform memory mapped IO.
[![Build Status](https://travis-ci.org/danburkert/memmap-rs.svg?branch=master)](https://travis-ci.org/danburkert/memmap-rs)
[![Windows Build Status](https://ci.appveyor.com/api/projects/status/ubka00959pstatkg/branch/master?svg=true)](https://ci.appveyor.com/project/danburkert/mmap)
[![Documentation](https://docs.rs/memmap/badge.svg)](https://docs.rs/memmap)
[![Crate](https://img.shields.io/crates/v/memmap.svg)](https://crates.io/crates/memmap)
## Features
- [x] file-backed memory maps
- [x] anonymous memory maps
- [x] synchronous and asynchronous flushing
- [x] copy-on-write memory maps
- [x] read-only memory maps
- [x] stack support (`MAP_STACK` on unix)
- [x] executable memory maps
- [ ] huge page support
## Platforms
`memmap` should work on any platform supported by
[`libc`](https://github.com/rust-lang-nursery/libc#platforms-and-documentation).
`memmap` requires Rust stable 1.13 or greater.
`memmap` is continuously tested on:
* `x86_64-unknown-linux-gnu` (Linux)
* `i686-unknown-linux-gnu`
* `x86_64-unknown-linux-musl` (Linux MUSL)
* `x86_64-apple-darwin` (OSX)
* `i686-apple-darwin`
* `x86_64-pc-windows-msvc` (Windows)
* `i686-pc-windows-msvc`
* `x86_64-pc-windows-gnu`
* `i686-pc-windows-gnu`
`memmap` is continuously cross-compiled against:
* `arm-linux-androideabi` (Android)
* `aarch64-unknown-linux-gnu` (ARM)
* `arm-unknown-linux-gnueabihf`
* `mips-unknown-linux-gnu` (MIPS)
* `x86_64-apple-ios` (iOS)
* `i686-apple-ios`
## License
`memmap` is primarily distributed under the terms of both the MIT license and the
Apache License (Version 2.0).
See [LICENSE-APACHE](LICENSE-APACHE), [LICENSE-MIT](LICENSE-MIT) for details.
Copyright (c) 2015 Dan Burkert.

47
third_party/rust/memmap/ci/install.sh поставляемый
Просмотреть файл

@ -1,47 +0,0 @@
set -ex
main() {
local target=
if [ $TRAVIS_OS_NAME = linux ]; then
target=x86_64-unknown-linux-musl
sort=sort
else
target=x86_64-apple-darwin
sort=gsort # for `sort --sort-version`, from brew's coreutils.
fi
# Builds for iOS are done on OSX, but require the specific target to be
# installed.
case $TARGET in
aarch64-apple-ios)
rustup target install aarch64-apple-ios
;;
armv7-apple-ios)
rustup target install armv7-apple-ios
;;
armv7s-apple-ios)
rustup target install armv7s-apple-ios
;;
i386-apple-ios)
rustup target install i386-apple-ios
;;
x86_64-apple-ios)
rustup target install x86_64-apple-ios
;;
esac
# This fetches latest stable release
local tag=$(git ls-remote --tags --refs --exit-code https://github.com/japaric/cross \
| cut -d/ -f3 \
| grep -E '^v[0.1.0-9.]+$' \
| $sort --version-sort \
| tail -n1)
curl -LSfs https://japaric.github.io/trust/install.sh | \
sh -s -- \
--force \
--git japaric/cross \
--tag $tag \
--target $target
}
main

20
third_party/rust/memmap/ci/script.sh поставляемый
Просмотреть файл

@ -1,20 +0,0 @@
# This script takes care of testing your crate
set -ex
main() {
cross build --target $TARGET
cross build --target $TARGET --release
if [ ! -z $DISABLE_TESTS ]; then
return
fi
cross test --target $TARGET
cross test --target $TARGET --release
}
# we don't run the "test phase" when doing deploys
if [ -z $TRAVIS_TAG ]; then
main
fi

23
third_party/rust/memmap/examples/cat.rs поставляемый
Просмотреть файл

@ -1,23 +0,0 @@
extern crate memmap;
use std::env;
use std::fs::File;
use std::io::{self, Write};
use memmap::Mmap;
/// Output a file's contents to stdout. The file path must be provided as the first process
/// argument.
fn main() {
let path = env::args()
.nth(1)
.expect("supply a single path as the program argument");
let file = File::open(path).expect("failed to open the file");
let mmap = unsafe { Mmap::map(&file).expect("failed to map the file") };
io::stdout()
.write_all(&mmap[..])
.expect("failed to output the file contents");
}

1008
third_party/rust/memmap/src/lib.rs поставляемый

Разница между файлами не показана из-за своего большого размера Загрузить разницу

214
third_party/rust/memmap/src/unix.rs поставляемый
Просмотреть файл

@ -1,214 +0,0 @@
extern crate libc;
use std::fs::File;
use std::os::unix::io::{AsRawFd, RawFd};
use std::{io, ptr};
#[cfg(any(
all(target_os = "linux", not(target_arch = "mips")),
target_os = "freebsd",
target_os = "android"
))]
const MAP_STACK: libc::c_int = libc::MAP_STACK;
#[cfg(not(any(
all(target_os = "linux", not(target_arch = "mips")),
target_os = "freebsd",
target_os = "android"
)))]
const MAP_STACK: libc::c_int = 0;
pub struct MmapInner {
ptr: *mut libc::c_void,
len: usize,
}
impl MmapInner {
/// Creates a new `MmapInner`.
///
/// This is a thin wrapper around the `mmap` sytem call.
fn new(
len: usize,
prot: libc::c_int,
flags: libc::c_int,
file: RawFd,
offset: u64,
) -> io::Result<MmapInner> {
let alignment = offset % page_size() as u64;
let aligned_offset = offset - alignment;
let aligned_len = len + alignment as usize;
if aligned_len == 0 {
// Normally the OS would catch this, but it segfaults under QEMU.
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"memory map must have a non-zero length",
));
}
unsafe {
let ptr = libc::mmap(
ptr::null_mut(),
aligned_len as libc::size_t,
prot,
flags,
file,
aligned_offset as libc::off_t,
);
if ptr == libc::MAP_FAILED {
Err(io::Error::last_os_error())
} else {
Ok(MmapInner {
ptr: ptr.offset(alignment as isize),
len: len,
})
}
}
}
pub fn map(len: usize, file: &File, offset: u64) -> io::Result<MmapInner> {
MmapInner::new(
len,
libc::PROT_READ,
libc::MAP_SHARED,
file.as_raw_fd(),
offset,
)
}
pub fn map_exec(len: usize, file: &File, offset: u64) -> io::Result<MmapInner> {
MmapInner::new(
len,
libc::PROT_READ | libc::PROT_EXEC,
libc::MAP_SHARED,
file.as_raw_fd(),
offset,
)
}
pub fn map_mut(len: usize, file: &File, offset: u64) -> io::Result<MmapInner> {
MmapInner::new(
len,
libc::PROT_READ | libc::PROT_WRITE,
libc::MAP_SHARED,
file.as_raw_fd(),
offset,
)
}
pub fn map_copy(len: usize, file: &File, offset: u64) -> io::Result<MmapInner> {
MmapInner::new(
len,
libc::PROT_READ | libc::PROT_WRITE,
libc::MAP_PRIVATE,
file.as_raw_fd(),
offset,
)
}
/// Open an anonymous memory map.
pub fn map_anon(len: usize, stack: bool) -> io::Result<MmapInner> {
let stack = if stack { MAP_STACK } else { 0 };
MmapInner::new(
len,
libc::PROT_READ | libc::PROT_WRITE,
libc::MAP_SHARED | libc::MAP_ANON | stack,
-1,
0,
)
}
pub fn flush(&self, offset: usize, len: usize) -> io::Result<()> {
let alignment = (self.ptr as usize + offset) % page_size();
let offset = offset as isize - alignment as isize;
let len = len + alignment;
let result =
unsafe { libc::msync(self.ptr.offset(offset), len as libc::size_t, libc::MS_SYNC) };
if result == 0 {
Ok(())
} else {
Err(io::Error::last_os_error())
}
}
pub fn flush_async(&self, offset: usize, len: usize) -> io::Result<()> {
let alignment = offset % page_size();
let aligned_offset = offset - alignment;
let aligned_len = len + alignment;
let result = unsafe {
libc::msync(
self.ptr.offset(aligned_offset as isize),
aligned_len as libc::size_t,
libc::MS_ASYNC,
)
};
if result == 0 {
Ok(())
} else {
Err(io::Error::last_os_error())
}
}
fn mprotect(&mut self, prot: libc::c_int) -> io::Result<()> {
unsafe {
let alignment = self.ptr as usize % page_size();
let ptr = self.ptr.offset(-(alignment as isize));
let len = self.len + alignment;
if libc::mprotect(ptr, len, prot) == 0 {
Ok(())
} else {
Err(io::Error::last_os_error())
}
}
}
pub fn make_read_only(&mut self) -> io::Result<()> {
self.mprotect(libc::PROT_READ)
}
pub fn make_exec(&mut self) -> io::Result<()> {
self.mprotect(libc::PROT_READ | libc::PROT_EXEC)
}
pub fn make_mut(&mut self) -> io::Result<()> {
self.mprotect(libc::PROT_READ | libc::PROT_WRITE)
}
#[inline]
pub fn ptr(&self) -> *const u8 {
self.ptr as *const u8
}
#[inline]
pub fn mut_ptr(&mut self) -> *mut u8 {
self.ptr as *mut u8
}
#[inline]
pub fn len(&self) -> usize {
self.len
}
}
impl Drop for MmapInner {
fn drop(&mut self) {
let alignment = self.ptr as usize % page_size();
unsafe {
assert!(
libc::munmap(
self.ptr.offset(-(alignment as isize)),
(self.len + alignment) as libc::size_t
) == 0,
"unable to unmap mmap: {}",
io::Error::last_os_error()
);
}
}
}
unsafe impl Sync for MmapInner {}
unsafe impl Send for MmapInner {}
fn page_size() -> usize {
unsafe { libc::sysconf(libc::_SC_PAGESIZE) as usize }
}

300
third_party/rust/memmap/src/windows.rs поставляемый
Просмотреть файл

@ -1,300 +0,0 @@
use std::fs::File;
use std::os::raw::c_void;
use std::os::windows::io::{AsRawHandle, RawHandle};
use std::{io, mem, ptr};
use winapi::shared::basetsd::SIZE_T;
use winapi::shared::minwindef::DWORD;
use winapi::um::handleapi::{CloseHandle, INVALID_HANDLE_VALUE};
use winapi::um::memoryapi::{
CreateFileMappingW, FlushViewOfFile, MapViewOfFile, UnmapViewOfFile, VirtualProtect,
FILE_MAP_ALL_ACCESS, FILE_MAP_COPY, FILE_MAP_EXECUTE, FILE_MAP_READ, FILE_MAP_WRITE,
};
use winapi::um::sysinfoapi::GetSystemInfo;
use winapi::um::winnt::{
PAGE_EXECUTE_READ, PAGE_EXECUTE_READWRITE, PAGE_EXECUTE_WRITECOPY, PAGE_READONLY,
PAGE_READWRITE, PAGE_WRITECOPY,
};
pub struct MmapInner {
file: Option<File>,
ptr: *mut c_void,
len: usize,
copy: bool,
}
impl MmapInner {
/// Creates a new `MmapInner`.
///
/// This is a thin wrapper around the `CreateFileMappingW` and `MapViewOfFile` system calls.
pub fn new(
file: &File,
protect: DWORD,
access: DWORD,
offset: u64,
len: usize,
copy: bool,
) -> io::Result<MmapInner> {
let alignment = offset % allocation_granularity() as u64;
let aligned_offset = offset - alignment as u64;
let aligned_len = len + alignment as usize;
unsafe {
let handle = CreateFileMappingW(
file.as_raw_handle(),
ptr::null_mut(),
protect,
0,
0,
ptr::null(),
);
if handle == ptr::null_mut() {
return Err(io::Error::last_os_error());
}
let ptr = MapViewOfFile(
handle,
access,
(aligned_offset >> 16 >> 16) as DWORD,
(aligned_offset & 0xffffffff) as DWORD,
aligned_len as SIZE_T,
);
CloseHandle(handle);
if ptr == ptr::null_mut() {
Err(io::Error::last_os_error())
} else {
Ok(MmapInner {
file: Some(file.try_clone()?),
ptr: ptr.offset(alignment as isize),
len: len as usize,
copy: copy,
})
}
}
}
pub fn map(len: usize, file: &File, offset: u64) -> io::Result<MmapInner> {
let write = protection_supported(file.as_raw_handle(), PAGE_READWRITE);
let exec = protection_supported(file.as_raw_handle(), PAGE_EXECUTE_READ);
let mut access = FILE_MAP_READ;
let protection = match (write, exec) {
(true, true) => {
access |= FILE_MAP_WRITE | FILE_MAP_EXECUTE;
PAGE_EXECUTE_READWRITE
}
(true, false) => {
access |= FILE_MAP_WRITE;
PAGE_READWRITE
}
(false, true) => {
access |= FILE_MAP_EXECUTE;
PAGE_EXECUTE_READ
}
(false, false) => PAGE_READONLY,
};
let mut inner = MmapInner::new(file, protection, access, offset, len, false)?;
if write || exec {
inner.make_read_only()?;
}
Ok(inner)
}
pub fn map_exec(len: usize, file: &File, offset: u64) -> io::Result<MmapInner> {
let write = protection_supported(file.as_raw_handle(), PAGE_READWRITE);
let mut access = FILE_MAP_READ | FILE_MAP_EXECUTE;
let protection = if write {
access |= FILE_MAP_WRITE;
PAGE_EXECUTE_READWRITE
} else {
PAGE_EXECUTE_READ
};
let mut inner = MmapInner::new(file, protection, access, offset, len, false)?;
if write {
inner.make_exec()?;
}
Ok(inner)
}
pub fn map_mut(len: usize, file: &File, offset: u64) -> io::Result<MmapInner> {
let exec = protection_supported(file.as_raw_handle(), PAGE_EXECUTE_READ);
let mut access = FILE_MAP_READ | FILE_MAP_WRITE;
let protection = if exec {
access |= FILE_MAP_EXECUTE;
PAGE_EXECUTE_READWRITE
} else {
PAGE_READWRITE
};
let mut inner = MmapInner::new(file, protection, access, offset, len, false)?;
if exec {
inner.make_mut()?;
}
Ok(inner)
}
pub fn map_copy(len: usize, file: &File, offset: u64) -> io::Result<MmapInner> {
let exec = protection_supported(file.as_raw_handle(), PAGE_EXECUTE_READWRITE);
let mut access = FILE_MAP_COPY;
let protection = if exec {
access |= FILE_MAP_EXECUTE;
PAGE_EXECUTE_WRITECOPY
} else {
PAGE_WRITECOPY
};
let mut inner = MmapInner::new(file, protection, access, offset, len, true)?;
if exec {
inner.make_mut()?;
}
Ok(inner)
}
pub fn map_anon(len: usize, _stack: bool) -> io::Result<MmapInner> {
unsafe {
// Create a mapping and view with maximum access permissions, then use `VirtualProtect`
// to set the actual `Protection`. This way, we can set more permissive protection later
// on.
// Also see https://msdn.microsoft.com/en-us/library/windows/desktop/aa366537.aspx
let handle = CreateFileMappingW(
INVALID_HANDLE_VALUE,
ptr::null_mut(),
PAGE_EXECUTE_READWRITE,
(len >> 16 >> 16) as DWORD,
(len & 0xffffffff) as DWORD,
ptr::null(),
);
if handle == ptr::null_mut() {
return Err(io::Error::last_os_error());
}
let access = FILE_MAP_ALL_ACCESS | FILE_MAP_EXECUTE;
let ptr = MapViewOfFile(handle, access, 0, 0, len as SIZE_T);
CloseHandle(handle);
if ptr == ptr::null_mut() {
return Err(io::Error::last_os_error());
}
let mut old = 0;
let result = VirtualProtect(ptr, len as SIZE_T, PAGE_READWRITE, &mut old);
if result != 0 {
Ok(MmapInner {
file: None,
ptr: ptr,
len: len as usize,
copy: false,
})
} else {
Err(io::Error::last_os_error())
}
}
}
pub fn flush(&self, offset: usize, len: usize) -> io::Result<()> {
self.flush_async(offset, len)?;
if let Some(ref file) = self.file {
file.sync_data()?;
}
Ok(())
}
pub fn flush_async(&self, offset: usize, len: usize) -> io::Result<()> {
let result = unsafe { FlushViewOfFile(self.ptr.offset(offset as isize), len as SIZE_T) };
if result != 0 {
Ok(())
} else {
Err(io::Error::last_os_error())
}
}
fn virtual_protect(&mut self, protect: DWORD) -> io::Result<()> {
unsafe {
let alignment = self.ptr as usize % allocation_granularity();
let ptr = self.ptr.offset(-(alignment as isize));
let aligned_len = self.len as SIZE_T + alignment as SIZE_T;
let mut old = 0;
let result = VirtualProtect(ptr, aligned_len, protect, &mut old);
if result != 0 {
Ok(())
} else {
Err(io::Error::last_os_error())
}
}
}
pub fn make_read_only(&mut self) -> io::Result<()> {
self.virtual_protect(PAGE_READONLY)
}
pub fn make_exec(&mut self) -> io::Result<()> {
if self.copy {
self.virtual_protect(PAGE_EXECUTE_WRITECOPY)
} else {
self.virtual_protect(PAGE_EXECUTE_READ)
}
}
pub fn make_mut(&mut self) -> io::Result<()> {
if self.copy {
self.virtual_protect(PAGE_WRITECOPY)
} else {
self.virtual_protect(PAGE_READWRITE)
}
}
#[inline]
pub fn ptr(&self) -> *const u8 {
self.ptr as *const u8
}
#[inline]
pub fn mut_ptr(&mut self) -> *mut u8 {
self.ptr as *mut u8
}
#[inline]
pub fn len(&self) -> usize {
self.len
}
}
impl Drop for MmapInner {
fn drop(&mut self) {
let alignment = self.ptr as usize % allocation_granularity();
unsafe {
let ptr = self.ptr.offset(-(alignment as isize));
assert!(
UnmapViewOfFile(ptr) != 0,
"unable to unmap mmap: {}",
io::Error::last_os_error()
);
}
}
}
unsafe impl Sync for MmapInner {}
unsafe impl Send for MmapInner {}
fn protection_supported(handle: RawHandle, protection: DWORD) -> bool {
unsafe {
let handle = CreateFileMappingW(handle, ptr::null_mut(), protection, 0, 0, ptr::null());
if handle == ptr::null_mut() {
return false;
}
CloseHandle(handle);
true
}
}
fn allocation_granularity() -> usize {
unsafe {
let mut info = mem::zeroed();
GetSystemInfo(&mut info);
return info.dwAllocationGranularity as usize;
}
}

Просмотреть файл

@ -4,7 +4,7 @@ version = "0.1.0"
authors = ["Markus Stange <mstange@themasta.com>"]
[dependencies]
memmap = "0.7"
memmap2 = "0.3"
rustc-demangle = "0.1"
uuid = "0.8"

Просмотреть файл

@ -2,7 +2,7 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
extern crate memmap;
extern crate memmap2;
extern crate rustc_demangle;
extern crate thin_vec;
extern crate uuid;
@ -18,7 +18,7 @@ mod compact_symbol_table;
mod elf;
#[cfg(feature = "parse_elf")]
use memmap::MmapOptions;
use memmap2::MmapOptions;
#[cfg(feature = "parse_elf")]
use std::fs::File;