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-rw-r--r--crates/ra_proc_macro_srv/src/dylib.rs7
1 files changed, 5 insertions, 2 deletions
diff --git a/crates/ra_proc_macro_srv/src/dylib.rs b/crates/ra_proc_macro_srv/src/dylib.rs
index 7d6e5d323..16bd7466e 100644
--- a/crates/ra_proc_macro_srv/src/dylib.rs
+++ b/crates/ra_proc_macro_srv/src/dylib.rs
@@ -1,10 +1,12 @@
1//! Handles dynamic library loading for proc macro 1//! Handles dynamic library loading for proc macro
2 2
3use crate::{proc_macro::bridge, rustc_server::TokenStream}; 3use crate::{proc_macro::bridge, rustc_server::TokenStream};
4use std::fs::File;
4use std::path::Path; 5use std::path::Path;
5 6
6use goblin::{mach::Mach, Object}; 7use goblin::{mach::Mach, Object};
7use libloading::Library; 8use libloading::Library;
9use memmap::Mmap;
8use ra_proc_macro::ProcMacroKind; 10use ra_proc_macro::ProcMacroKind;
9 11
10use std::io::Error as IoError; 12use std::io::Error as IoError;
@@ -21,7 +23,8 @@ fn is_derive_registrar_symbol(symbol: &str) -> bool {
21} 23}
22 24
23fn find_registrar_symbol(file: &Path) -> Result<Option<String>, IoError> { 25fn find_registrar_symbol(file: &Path) -> Result<Option<String>, IoError> {
24 let buffer = std::fs::read(file)?; 26 let file = File::open(file)?;
27 let buffer = unsafe { Mmap::map(&file)? };
25 let object = Object::parse(&buffer).map_err(invalid_data_err)?; 28 let object = Object::parse(&buffer).map_err(invalid_data_err)?;
26 29
27 match object { 30 match object {
@@ -55,7 +58,7 @@ fn find_registrar_symbol(file: &Path) -> Result<Option<String>, IoError> {
55 &s.name 58 &s.name
56 } 59 }
57 }) 60 })
58 .find(|s| is_derive_registrar_symbol(&s)) 61 .find(|s| is_derive_registrar_symbol(s))
59 .map(|s| s.to_string()); 62 .map(|s| s.to_string());
60 Ok(name) 63 Ok(name)
61 } 64 }