diff --git a/src/debug_info.rs b/src/debug_info.rs
index ad972b5..b220a9c 100644
--- a/src/debug_info.rs
+++ b/src/debug_info.rs
@@ -1,4 +1,6 @@
-use std::io::Read;
+use std::fs::File;
+use std::io::BufReader;
+use std::path::Path;
 use std::path::PathBuf;
 use std::time::Duration;
 
@@ -20,7 +22,7 @@ pub trait DebugInfoManager {
         name: &str,
         build_id: &BuildId,
         executable_id: ExecutableId,
-        file: &mut std::fs::File,
+        debug_info: &Path,
     ) -> anyhow::Result<()>;
     fn debug_info_path(&self) -> Option<PathBuf>;
 }
@@ -32,7 +34,7 @@ impl DebugInfoManager for DebugInfoBackendNull {
         _name: &str,
         _build_id: &BuildId,
         _executable_id: ExecutableId,
-        _file: &mut std::fs::File,
+        _debug_info: &Path,
     ) -> anyhow::Result<()> {
         Ok(())
     }
@@ -53,14 +55,14 @@ impl DebugInfoManager for DebugInfoBackendFilesystem {
         _name: &str,
         build_id: &BuildId,
         executable_id: ExecutableId,
-        file: &mut std::fs::File,
+        debug_info: &Path,
     ) -> anyhow::Result<()> {
         // try to find, else extract
         if self.find_in_fs(build_id) {
             return Ok(());
         }
 
-        self.add_to_fs(build_id, executable_id, file)
+        self.add_to_fs(build_id, executable_id, debug_info)
     }
 
     fn debug_info_path(&self) -> Option<PathBuf> {
@@ -77,13 +79,14 @@ impl DebugInfoBackendFilesystem {
         &self,
         build_id: &BuildId,
         _executable_id: ExecutableId,
-        file: &mut std::fs::File,
+        debug_info: &Path,
     ) -> anyhow::Result<()> {
         // TODO: add support for other methods beyond copying. For example
         // hardlinks could be used and only fall back to copying if the src
         // and dst filesystems differ.
+        let mut reader = BufReader::new(File::open(debug_info)?);
         let mut writer = std::fs::File::create(self.path.join(build_id.to_string()))?;
-        std::io::copy(file, &mut writer)?;
+        std::io::copy(&mut reader, &mut writer)?;
         Ok(())
     }
 }
@@ -100,7 +103,7 @@ impl DebugInfoManager for DebugInfoBackendRemote {
         name: &str,
         build_id: &BuildId,
         executable_id: ExecutableId,
-        file: &mut std::fs::File,
+        debug_info: &Path,
     ) -> anyhow::Result<()> {
         // TODO: add a local cache to not have to reach to the backend
         // unnecessarily.
@@ -109,7 +112,7 @@ impl DebugInfoManager for DebugInfoBackendRemote {
         }
 
         // TODO: do this in another thread.
-        self.upload_to_backend(name, build_id, executable_id, file)?;
+        self.upload_to_backend(name, build_id, executable_id, debug_info)?;
         Ok(())
     }
 
@@ -142,12 +145,10 @@ impl DebugInfoBackendRemote {
         name: &str,
         build_id: &BuildId,
         executable_id: ExecutableId,
-        file: &mut std::fs::File,
+        debug_info: &Path,
     ) -> anyhow::Result<()> {
         let client_builder = reqwest::blocking::Client::builder().timeout(self.http_client_timeout);
         let client = client_builder.build()?;
-        let mut debug_info = Vec::new();
-        file.read_to_end(&mut debug_info)?;
 
         let response = client
             .post(format!(
@@ -157,7 +158,7 @@ impl DebugInfoBackendRemote {
                 build_id,
                 executable_id
             ))
-            .body(debug_info)
+            .body(File::open(debug_info)?)
             .send()?;
         println!("wrote debug info to server {:?}", response);
         Ok(())
diff --git a/src/profiler.rs b/src/profiler.rs
index c503d1b..001ae81 100644
--- a/src/profiler.rs
+++ b/src/profiler.rs
@@ -1553,7 +1553,7 @@ impl Profiler {
 
                     // We want to open the file as quickly as possible to minimise the chances of races
                     // if the file is deleted.
-                    let mut file = match fs::File::open(&abs_path) {
+                    let file = match fs::File::open(&abs_path) {
                         Ok(f) => f,
                         Err(e) => {
                             debug!("failed to open file {} due to {:?}", abs_path, e);
@@ -1628,7 +1628,7 @@ impl Profiler {
                             &name,
                             &build_id,
                             executable_id,
-                            &mut file,
+                            &abs_path,
                         );
                         debug!("debug info manager add result {:?}", res);
                     } else {