fix mmap twice

rasp/librasp/src/golang.rs

@@ -1,4 +1,5 @@
 use log::*;
+use memmap::Mmap;
 use std::fs::File;
 use std::{fs, path::PathBuf, process::Command};
 use regex::Regex;
@@ -160,9 +161,9 @@ pub fn parse_version(version: &String) -> Result<String> {
     return Err(anyhow::anyhow!("Failed to extract version number, from: {}", version));
 }
 
-pub fn golang_version(file: &File, elf: &Elf) -> Result<String> {
+pub fn golang_version(file: &File, elf: &Elf, bin: &Mmap) -> Result<String> {
 
-    if let Ok(version) = find_by_section(&elf, &file) {
+    if let Ok(version) = find_by_section(&elf, &file, &bin) {
         return parse_version(&version);
     } else {
         if let Ok(version) = find_by_symbol(&elf, &file) {

rasp/librasp/src/parse_elf.rs

@@ -143,7 +143,7 @@ pub fn find_by_symbol(elf: &Elf, file: &File) -> Result<String> {
     }
 }
 
-pub fn find_by_section(elf: &Elf, file: &File) -> Result<String> {
+pub fn find_by_section(elf: &Elf, file: &File, mmap: &Mmap) -> Result<String> {
     let mut version: String = String::new();
 
     // find .go.buildinfo 
@@ -159,10 +159,6 @@ pub fn find_by_section(elf: &Elf, file: &File) -> Result<String> {
         let end = (go_buildinfo_section.sh_offset + go_buildinfo_section.sh_size) as usize;
 
         // Memory map the specific section
-        let mmap = match unsafe { Mmap::map(file) } {
-            Ok(m) => m,
-            Err(e) => {return Err(anyhow!(e));}// Return empty string if mmap fails
-        };
         if mmap.len() < end {
             return Err(anyhow!("mmap length invaild")); // Return empty string if the section is out of bounds
         }