feat: add some logs

Cargo.toml

@@ -16,6 +16,8 @@ strip = true        # Strip symbols from binary*
 [dependencies]
 anyhow = "1.0.72"
 clap = { version = "4.0.14", features = ["derive"] }
+env_logger = "0.10"
+log = "0.4"
 nix = { version = "0.26.2", features = [ "uio" ] }
 once_cell = "1.18.0"
 regex = "1.6.0"

src/dex.rs

@@ -1,5 +1,6 @@
 use std::{fs, mem, ptr};
 use std::path::PathBuf;
+use log::debug;
 use once_cell::sync::Lazy;
 use regex::bytes::Regex;
 use crate::memory::{RemoteMemory, MemoryMap};
@@ -67,19 +68,23 @@ impl<'a> MemoryDex<'a> {
 
     pub fn is_valid(&self) -> bool {
         if !PATTERN_DEX_MAGIC.is_match(&self.header.magic) {
+            debug!("invalid header magic: {:?}", &self.header.magic);
             return false
         }
 
         if self.map.size() < self.header.file_size as usize {
+            debug!("file size doesn't match");
             return false
         }
 
         // https://source.android.com/docs/core/runtime/dex-format?hl=zh-cn#endian-constant
         if self.header.endian_tag != 0x12345678 && self.header.endian_tag != 0x78563412 {
+            debug!("invalid endian tag");
             return false;
         }
 
         if self.header.type_ids_size > 65535 || self.header.proto_ids_size > 65535 {
+            debug!("too many method ids or proto ids");
             return false;
         }
 

src/main.rs

@@ -4,6 +4,8 @@ mod memory;
 mod dex;
 
 fn main() {
+    env_logger::init();
+
     if let Err(err) = dump::dump_dex_files(&argparse::parse()) {
         println!("[!] Error: {:?}", err)
     }