feat: add object-demo

2023-03-17 00:36:18 +08:00
parent e7f03687dc
commit 1defe5958f
4 changed files with 418 additions and 2 deletions
--- a/README.md
+++ b/README.md
@@ -7,7 +7,8 @@ Project or files:
 .
 ├── README_2.md
 ├── __bin
-│   └── goblin
+│   ├── goblin
+│   └── object-demo
 ├── __compress
 │   └── zstd-demo
 ├── __concurrent
@@ -271,6 +272,6 @@ Project or files:
    ├── vec.rs
    └── while.rs

-240 directories, 39 files
+241 directories, 39 files
 ```

--- a/__bin/object-demo/Cargo.lock
+++ b/__bin/object-demo/Cargo.lock
@@ -0,0 +1,82 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "adler"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "crc32fast"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b540bd8bc810d3885c6ea91e2018302f68baba2129ab3e88f32389ee9370880d"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "flate2"
+version = "1.0.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8a2db397cb1c8772f31494cb8917e48cd1e64f0fa7efac59fbd741a0a8ce841"
+dependencies = [
+ "crc32fast",
+ "miniz_oxide",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.140"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99227334921fae1a979cf0bfdfcc6b3e5ce376ef57e16fb6fb3ea2ed6095f80c"
+
+[[package]]
+name = "memchr"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+
+[[package]]
+name = "memmap2"
+version = "0.5.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83faa42c0a078c393f6b29d5db232d8be22776a891f8f56e5284faee4a20b327"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "miniz_oxide"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b275950c28b37e794e8c55d88aeb5e139d0ce23fdbbeda68f8d7174abdf9e8fa"
+dependencies = [
+ "adler",
+]
+
+[[package]]
+name = "object"
+version = "0.30.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea86265d3d3dcb6a27fc51bd29a4bf387fae9d2986b823079d4986af253eb439"
+dependencies = [
+ "flate2",
+ "memchr",
+]
+
+[[package]]
+name = "object-demo"
+version = "0.1.0"
+dependencies = [
+ "memmap2",
+ "object",
+]
--- a/__bin/object-demo/Cargo.toml
+++ b/__bin/object-demo/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "object-demo"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+memmap2 = "0.5.10"
+object = "0.30.3"
--- a/__bin/object-demo/src/main.rs
+++ b/__bin/object-demo/src/main.rs
@@ -0,0 +1,323 @@
+use std::io::{Result, Write};
+
+use object::{Endianness, Object, ObjectComdat, ObjectSection, ObjectSymbol};
+use object::read::archive::ArchiveFile;
+use object::read::macho::{DyldCache, FatArch, FatHeader};
+
+use std::{env, fs, io, process};
+
+fn main() {
+    let mut args = env::args();
+    let cmd = args.next().unwrap();
+    if args.len() == 0 {
+        eprintln!("Usage: {} <file> [<member>...]", cmd);
+        process::exit(1);
+    }
+    let file_path = args.next().unwrap();
+    let member_names: Vec<_> = args.collect();
+
+    let file = match fs::File::open(&file_path) {
+        Ok(file) => file,
+        Err(err) => {
+            eprintln!("Failed to open file '{}': {}", file_path, err,);
+            process::exit(1);
+        }
+    };
+    let extra_files = open_subcaches_if_exist(&file_path);
+    let file = match unsafe { memmap2::Mmap::map(&file) } {
+        Ok(mmap) => mmap,
+        Err(err) => {
+            eprintln!("Failed to map file '{}': {}", file_path, err,);
+            process::exit(1);
+        }
+    };
+    let extra_files: Vec<_> = extra_files
+        .into_iter()
+        .map(
+            |subcache_file| match unsafe { memmap2::Mmap::map(&subcache_file) } {
+                Ok(mmap) => mmap,
+                Err(err) => {
+                    eprintln!("Failed to map file '{}': {}", file_path, err,);
+                    process::exit(1);
+                }
+            },
+        )
+        .collect();
+    let extra_file_data: Vec<&[u8]> = extra_files.iter().map(|f| &**f).collect();
+
+    let stdout = io::stdout();
+    let stderr = io::stderr();
+    print(
+        &mut stdout.lock(),
+        &mut stderr.lock(),
+        &*file,
+        &extra_file_data,
+        member_names,
+    )
+        .unwrap();
+}
+
+// If the file is a dyld shared cache, and we're on macOS 12 or later,
+// then there will be one or more "subcache" files next to this file,
+// with the names filename.1, filename.2 etc.
+// Read those files now, if they exist, even if we don't know that
+// we're dealing with a dyld shared cache. By the time we know what
+// we're dealing with, it's too late to read more files.
+fn open_subcaches_if_exist(path: &str) -> Vec<fs::File> {
+    let mut files = Vec::new();
+    for i in 1.. {
+        let subcache_path = format!("{}.{}", path, i);
+        match fs::File::open(&subcache_path) {
+            Ok(subcache_file) => files.push(subcache_file),
+            Err(_) => break,
+        };
+    }
+    let symbols_subcache_path = format!("{}.symbols", path);
+    if let Ok(subcache_file) = fs::File::open(&symbols_subcache_path) {
+        files.push(subcache_file);
+    };
+    files
+}
+
+pub fn print<W: Write, E: Write>(
+    w: &mut W,
+    e: &mut E,
+    file: &[u8],
+    extra_files: &[&[u8]],
+    member_names: Vec<String>,
+) -> Result<()> {
+    let mut member_names: Vec<_> = member_names.into_iter().map(|name| (name, false)).collect();
+
+    if let Ok(archive) = ArchiveFile::parse(file) {
+        writeln!(w, "Format: Archive (kind: {:?})", archive.kind())?;
+        for member in archive.members() {
+            match member {
+                Ok(member) => {
+                    if find_member(&mut member_names, member.name()) {
+                        writeln!(w)?;
+                        writeln!(w, "{}:", String::from_utf8_lossy(member.name()))?;
+                        if let Ok(data) = member.data(file) {
+                            dump_object(w, e, data)?;
+                        }
+                    }
+                }
+                Err(err) => writeln!(e, "Failed to parse archive member: {}", err)?,
+            }
+        }
+    } else if let Ok(arches) = FatHeader::parse_arch32(file) {
+        writeln!(w, "Format: Mach-O Fat 32")?;
+        for arch in arches {
+            writeln!(w)?;
+            writeln!(w, "Fat Arch: {:?}", arch.architecture())?;
+            match arch.data(file) {
+                Ok(data) => dump_object(w, e, data)?,
+                Err(err) => writeln!(e, "Failed to parse Fat 32 data: {}", err)?,
+            }
+        }
+    } else if let Ok(arches) = FatHeader::parse_arch64(file) {
+        writeln!(w, "Format: Mach-O Fat 64")?;
+        for arch in arches {
+            writeln!(w)?;
+            writeln!(w, "Fat Arch: {:?}", arch.architecture())?;
+            match arch.data(file) {
+                Ok(data) => dump_object(w, e, data)?,
+                Err(err) => writeln!(e, "Failed to parse Fat 64 data: {}", err)?,
+            }
+        }
+    } else if let Ok(cache) = DyldCache::<Endianness>::parse(file, extra_files) {
+        writeln!(w, "Format: dyld cache {:?}-endian", cache.endianness())?;
+        writeln!(w, "Architecture: {:?}", cache.architecture())?;
+        for image in cache.images() {
+            let path = match image.path() {
+                Ok(path) => path,
+                Err(err) => {
+                    writeln!(e, "Failed to parse dydld image name: {}", err)?;
+                    continue;
+                }
+            };
+            if !find_member(&mut member_names, path.as_bytes()) {
+                continue;
+            }
+            writeln!(w)?;
+            writeln!(w, "{}:", path)?;
+            let file = match image.parse_object() {
+                Ok(file) => file,
+                Err(err) => {
+                    writeln!(e, "Failed to parse file: {}", err)?;
+                    continue;
+                }
+            };
+            dump_parsed_object(w, e, &file)?;
+        }
+    } else {
+        dump_object(w, e, file)?;
+    }
+
+    for (name, found) in member_names {
+        if !found {
+            writeln!(e, "Failed to find member '{}", name)?;
+        }
+    }
+    Ok(())
+}
+
+fn find_member(member_names: &mut [(String, bool)], name: &[u8]) -> bool {
+    if member_names.is_empty() {
+        return true;
+    }
+    match member_names.iter().position(|x| x.0.as_bytes() == name) {
+        Some(i) => {
+            member_names[i].1 = true;
+            true
+        }
+        None => false,
+    }
+}
+
+fn dump_object<W: Write, E: Write>(w: &mut W, e: &mut E, data: &[u8]) -> Result<()> {
+    match object::File::parse(data) {
+        Ok(file) => {
+            dump_parsed_object(w, e, &file)?;
+        }
+        Err(err) => {
+            writeln!(e, "Failed to parse file: {}", err)?;
+        }
+    }
+    Ok(())
+}
+
+fn dump_parsed_object<W: Write, E: Write>(w: &mut W, e: &mut E, file: &object::File) -> Result<()> {
+    writeln!(
+        w,
+        "Format: {:?} {:?}-endian {}-bit",
+        file.format(),
+        file.endianness(),
+        if file.is_64() { "64" } else { "32" }
+    )?;
+    writeln!(w, "Kind: {:?}", file.kind())?;
+    writeln!(w, "Architecture: {:?}", file.architecture())?;
+    writeln!(w, "Flags: {:x?}", file.flags())?;
+    writeln!(
+        w,
+        "Relative Address Base: {:x?}",
+        file.relative_address_base()
+    )?;
+    writeln!(w, "Entry Address: {:x?}", file.entry())?;
+
+    match file.mach_uuid() {
+        Ok(Some(uuid)) => writeln!(w, "Mach UUID: {:x?}", uuid)?,
+        Ok(None) => {}
+        Err(err) => writeln!(e, "Failed to parse Mach UUID: {}", err)?,
+    }
+    match file.build_id() {
+        Ok(Some(build_id)) => writeln!(w, "Build ID: {:x?}", build_id)?,
+        Ok(None) => {}
+        Err(err) => writeln!(e, "Failed to parse build ID: {}", err)?,
+    }
+    match file.gnu_debuglink() {
+        Ok(Some((filename, crc))) => writeln!(
+            w,
+            "GNU debug link: {} CRC: {:08x}",
+            String::from_utf8_lossy(filename),
+            crc,
+        )?,
+        Ok(None) => {}
+        Err(err) => writeln!(e, "Failed to parse GNU debug link: {}", err)?,
+    }
+    match file.gnu_debugaltlink() {
+        Ok(Some((filename, build_id))) => writeln!(
+            w,
+            "GNU debug alt link: {}, build ID: {:x?}",
+            String::from_utf8_lossy(filename),
+            build_id,
+        )?,
+        Ok(None) => {}
+        Err(err) => writeln!(e, "Failed to parse GNU debug alt link: {}", err)?,
+    }
+    match file.pdb_info() {
+        Ok(Some(info)) => writeln!(
+            w,
+            "PDB file: {}, GUID: {:x?}, Age: {}",
+            String::from_utf8_lossy(info.path()),
+            info.guid(),
+            info.age()
+        )?,
+        Ok(None) => {}
+        Err(err) => writeln!(e, "Failed to parse PE CodeView info: {}", err)?,
+    }
+
+    for segment in file.segments() {
+        writeln!(w, "{:x?}", segment)?;
+    }
+
+    for section in file.sections() {
+        writeln!(w, "{}: {:x?}", section.index().0, section)?;
+    }
+
+    for comdat in file.comdats() {
+        write!(w, "{:?} Sections:", comdat)?;
+        for section in comdat.sections() {
+            write!(w, " {}", section.0)?;
+        }
+        writeln!(w)?;
+    }
+
+    writeln!(w)?;
+    writeln!(w, "Symbols")?;
+    for symbol in file.symbols() {
+        writeln!(w, "{}: {:x?}", symbol.index().0, symbol)?;
+    }
+
+    for section in file.sections() {
+        if section.relocations().next().is_some() {
+            writeln!(
+                w,
+                "\n{} relocations",
+                section.name().unwrap_or("<invalid name>")
+            )?;
+            for relocation in section.relocations() {
+                writeln!(w, "{:x?}", relocation)?;
+            }
+        }
+    }
+
+    writeln!(w)?;
+    writeln!(w, "Dynamic symbols")?;
+    for symbol in file.dynamic_symbols() {
+        writeln!(w, "{}: {:x?}", symbol.index().0, symbol)?;
+    }
+
+    if let Some(relocations) = file.dynamic_relocations() {
+        writeln!(w)?;
+        writeln!(w, "Dynamic relocations")?;
+        for relocation in relocations {
+            writeln!(w, "{:x?}", relocation)?;
+        }
+    }
+
+    match file.imports() {
+        Ok(imports) => {
+            if !imports.is_empty() {
+                writeln!(w)?;
+                for import in imports {
+                    writeln!(w, "{:x?}", import)?;
+                }
+            }
+        }
+        Err(err) => writeln!(e, "Failed to parse imports: {}", err)?,
+    }
+
+    match file.exports() {
+        Ok(exports) => {
+            if !exports.is_empty() {
+                writeln!(w)?;
+                for export in exports {
+                    writeln!(w, "{:x?}", export)?;
+                }
+            }
+        }
+        Err(err) => writeln!(e, "Failed to parse exports: {}", err)?,
+    }
+
+    Ok(())
+}