Add debug logs for dev's issue

mirrord/layer/src/file/ops.rs

@@ -7,15 +7,14 @@ use mirrord_protocol::file::{
     WriteFileResponse, XstatFsResponse, XstatResponse,
 };
 use rand::distributions::{Alphanumeric, DistString};
-use tracing::{error, trace};
+use tracing::{debug, error, trace};
 
 use super::{hooks::FN_OPEN, open_dirs::OPEN_DIRS, *};
 use crate::{
     common,
     detour::{Bypass, Detour},
     error::{HookError, HookResult as Result},
 };
-
 /// 1 Megabyte. Large read requests can lead to timeouts.
 const MAX_READ_SIZE: u64 = 1024 * 1024;
 
@@ -154,6 +153,11 @@ fn close_remote_file_on_failure(fd: u64) -> Result<()> {
 /// [`OPEN_FILES`].
 #[tracing::instrument(level = "trace", ret)]
 pub(crate) fn open(path: Detour<PathBuf>, open_options: OpenOptionsInternal) -> Detour<RawFd> {
+    debug!(
+        "open-ish called | OPEN_FILES: {:#?}, path: {:#?}",
+        OPEN_FILES, path
+    );
+
     let path = path?;
 
     if path.is_relative() {
@@ -175,6 +179,8 @@ pub(crate) fn open(path: Detour<PathBuf>, open_options: OpenOptionsInternal) ->
         Arc::new(RemoteFile::new(remote_fd, path.display().to_string())),
     );
 
+    debug!("open-ish after insertion | OPEN_FILES: {:#?}", OPEN_FILES);
+
     Detour::Success(local_file_fd)
 }
 

mirrord/layer/src/lib.rs

@@ -84,6 +84,7 @@ use mirrord_layer_macro::{hook_fn, hook_guard_fn};
 use proxy_connection::ProxyConnection;
 use setup::LayerSetup;
 use socket::SOCKETS;
+use tracing::debug;
 use tracing_subscriber::{fmt::format::FmtSpan, prelude::*};
 
 use crate::{debugger_ports::DebuggerPorts, detour::DetourGuard, load::LoadType};
@@ -456,13 +457,16 @@ fn enable_hooks(enabled_file_ops: bool, enabled_remote_dns: bool, patch_binaries
 /// **DON'T ADD LOGS HERE SINCE CALLER MIGHT CLOSE STDOUT/STDERR CAUSING THIS TO CRASH**
 pub(crate) fn close_layer_fd(fd: c_int) {
     // Remove from sockets.
+    debug!("Closing, OPEN_FILES: {:?}", fd, OPEN_FILES);
     if let Some((_, socket)) = SOCKETS.remove(&fd) {
         // Closed file is a socket, so if it's already bound to a port - notify agent to stop
         // mirroring/stealing that port.
         socket.close();
     } else if setup().fs_config().is_active() {
         OPEN_FILES.remove(&fd);
     }
+
+    debug!("Closed, OPEN_FILES: {:?}", fd, OPEN_FILES);
 }
 
 // TODO: When this is annotated with `hook_guard_fn`, then the outgoing sockets never call it (we