Remove OutBHandlerWrapper type

Co-authored-by: simongdavies <[email protected]>

Author: Copilot

src/hyperlight_host/src/hypervisor/handlers.rs

@@ -28,14 +28,6 @@ pub trait OutBHandlerCaller: Sync + Send {
     fn call(&mut self, port: u16, payload: u32) -> Result<()>;
 }
 
-/// A convenient type representing a common way `OutBHandler` implementations
-/// are passed as parameters to functions
-///
-/// Note: This needs to be wrapped in a Mutex to be able to grab a mutable
-/// reference to the underlying data (i.e., handle_outb in `Sandbox` takes
-/// a &mut self).
-pub type OutBHandlerWrapper = Arc<Mutex<dyn OutBHandlerCaller>>;
-
 pub(crate) type OutBHandlerFunction = Box<dyn FnMut(u16, u32) -> Result<()> + Send>;
 
 /// A `OutBHandler` implementation using a `OutBHandlerFunction`

src/hyperlight_host/src/hypervisor/hyperv_linux.rs

@@ -25,6 +25,7 @@ extern crate mshv_bindings3 as mshv_bindings;
 extern crate mshv_ioctls3 as mshv_ioctls;
 
 use std::fmt::{Debug, Formatter};
+use std::sync::{Arc, Mutex};
 
 use log::{error, LevelFilter};
 #[cfg(mshv2)]
@@ -54,7 +55,7 @@ use super::fpu::{FP_CONTROL_WORD_DEFAULT, FP_TAG_WORD_DEFAULT, MXCSR_DEFAULT};
 use super::gdb::{DebugCommChannel, DebugMsg, DebugResponse, GuestDebug, MshvDebug};
 #[cfg(gdb)]
 use super::handlers::DbgMemAccessHandlerWrapper;
-use super::handlers::{MemAccessHandlerWrapper, OutBHandlerWrapper};
+use super::handlers::{MemAccessHandlerWrapper, OutBHandler, OutBHandlerCaller};
 use super::{
     Hypervisor, VirtualCPU, CR0_AM, CR0_ET, CR0_MP, CR0_NE, CR0_PE, CR0_PG, CR0_WP, CR4_OSFXSR,
     CR4_OSXMMEXCPT, CR4_PAE, EFER_LMA, EFER_LME, EFER_NX, EFER_SCE,
@@ -459,7 +460,7 @@ impl Hypervisor for HypervLinuxDriver {
         peb_addr: RawPtr,
         seed: u64,
         page_size: u32,
-        outb_hdl: OutBHandlerWrapper,
+        outb_hdl: Arc<Mutex<OutBHandler>>,
         mem_access_hdl: MemAccessHandlerWrapper,
         hv_handler: Option<HypervisorHandler>,
         max_guest_log_level: Option<LevelFilter>,
@@ -501,7 +502,7 @@ impl Hypervisor for HypervLinuxDriver {
     fn dispatch_call_from_host(
         &mut self,
         dispatch_func_addr: RawPtr,
-        outb_handle_fn: OutBHandlerWrapper,
+        outb_handle_fn: Arc<Mutex<OutBHandler>>,
         mem_access_fn: MemAccessHandlerWrapper,
         hv_handler: Option<HypervisorHandler>,
         #[cfg(gdb)] dbg_mem_access_fn: DbgMemAccessHandlerWrapper,
@@ -544,7 +545,7 @@ impl Hypervisor for HypervLinuxDriver {
         data: Vec<u8>,
         rip: u64,
         instruction_length: u64,
-        outb_handle_fn: OutBHandlerWrapper,
+        outb_handle_fn: Arc<Mutex<OutBHandler>>,
     ) -> Result<()> {
         let mut padded = [0u8; 4];
         let copy_len = data.len().min(4);

src/hyperlight_host/src/hypervisor/hyperv_windows.rs

@@ -18,6 +18,7 @@ use core::ffi::c_void;
 use std::fmt;
 use std::fmt::{Debug, Formatter};
 use std::string::String;
+use std::sync::{Arc, Mutex};
 
 use hyperlight_common::mem::PAGE_SIZE_USIZE;
 use log::LevelFilter;
@@ -31,7 +32,7 @@ use windows::Win32::System::Hypervisor::{
 use super::fpu::{FP_TAG_WORD_DEFAULT, MXCSR_DEFAULT};
 #[cfg(gdb)]
 use super::handlers::DbgMemAccessHandlerWrapper;
-use super::handlers::{MemAccessHandlerWrapper, OutBHandlerWrapper};
+use super::handlers::{MemAccessHandlerWrapper, OutBHandler, OutBHandlerCaller};
 use super::surrogate_process::SurrogateProcess;
 use super::surrogate_process_manager::*;
 use super::windows_hypervisor_platform::{VMPartition, VMProcessor};
@@ -305,7 +306,7 @@ impl Hypervisor for HypervWindowsDriver {
         peb_address: RawPtr,
         seed: u64,
         page_size: u32,
-        outb_hdl: OutBHandlerWrapper,
+        outb_hdl: Arc<Mutex<OutBHandler>>,
         mem_access_hdl: MemAccessHandlerWrapper,
         hv_handler: Option<HypervisorHandler>,
         max_guest_log_level: Option<LevelFilter>,
@@ -347,7 +348,7 @@ impl Hypervisor for HypervWindowsDriver {
     fn dispatch_call_from_host(
         &mut self,
         dispatch_func_addr: RawPtr,
-        outb_hdl: OutBHandlerWrapper,
+        outb_hdl: Arc<Mutex<OutBHandler>>,
         mem_access_hdl: MemAccessHandlerWrapper,
         hv_handler: Option<HypervisorHandler>,
         #[cfg(gdb)] dbg_mem_access_hdl: DbgMemAccessHandlerWrapper,
@@ -388,7 +389,7 @@ impl Hypervisor for HypervWindowsDriver {
         data: Vec<u8>,
         rip: u64,
         instruction_length: u64,
-        outb_handle_fn: OutBHandlerWrapper,
+        outb_handle_fn: Arc<Mutex<OutBHandler>>,
     ) -> Result<()> {
         let mut padded = [0u8; 4];
         let copy_len = data.len().min(4);

src/hyperlight_host/src/hypervisor/hypervisor_handler.rs

@@ -39,7 +39,7 @@ use windows::Win32::System::Hypervisor::{WHvCancelRunVirtualProcessor, WHV_PARTI
 use super::gdb::create_gdb_thread;
 #[cfg(gdb)]
 use crate::hypervisor::handlers::DbgMemAccessHandlerWrapper;
-use crate::hypervisor::handlers::{MemAccessHandlerWrapper, OutBHandlerWrapper};
+use crate::hypervisor::handlers::{MemAccessHandlerWrapper, OutBHandler};
 #[cfg(target_os = "windows")]
 use crate::hypervisor::wrappers::HandleWrapper;
 use crate::hypervisor::Hypervisor;
@@ -184,7 +184,7 @@ pub(crate) struct HvHandlerConfig {
     pub(crate) dispatch_function_addr: Arc<Mutex<Option<RawPtr>>>,
     pub(crate) max_init_time: Duration,
     pub(crate) max_exec_time: Duration,
-    pub(crate) outb_handler: OutBHandlerWrapper,
+    pub(crate) outb_handler: Arc<Mutex<OutBHandler>>,
     pub(crate) mem_access_handler: MemAccessHandlerWrapper,
     pub(crate) max_wait_for_cancellation: Duration,
     pub(crate) max_guest_log_level: Option<LevelFilter>,

src/hyperlight_host/src/hypervisor/kvm.rs

@@ -16,7 +16,6 @@ limitations under the License.
 
 use std::convert::TryFrom;
 use std::fmt::Debug;
-#[cfg(gdb)]
 use std::sync::{Arc, Mutex};
 
 use kvm_bindings::{kvm_fpu, kvm_regs, kvm_userspace_memory_region, KVM_MEM_READONLY};
@@ -30,7 +29,7 @@ use super::fpu::{FP_CONTROL_WORD_DEFAULT, FP_TAG_WORD_DEFAULT, MXCSR_DEFAULT};
 use super::gdb::{DebugCommChannel, DebugMsg, DebugResponse, GuestDebug, KvmDebug, VcpuStopReason};
 #[cfg(gdb)]
 use super::handlers::DbgMemAccessHandlerWrapper;
-use super::handlers::{MemAccessHandlerWrapper, OutBHandlerWrapper};
+use super::handlers::{MemAccessHandlerWrapper, OutBHandler, OutBHandlerCaller};
 use super::{
     HyperlightExit, Hypervisor, VirtualCPU, CR0_AM, CR0_ET, CR0_MP, CR0_NE, CR0_PE, CR0_PG, CR0_WP,
     CR4_OSFXSR, CR4_OSXMMEXCPT, CR4_PAE, EFER_LMA, EFER_LME, EFER_NX, EFER_SCE,
@@ -404,7 +403,7 @@ impl Hypervisor for KVMDriver {
         peb_addr: RawPtr,
         seed: u64,
         page_size: u32,
-        outb_hdl: OutBHandlerWrapper,
+        outb_hdl: Arc<Mutex<OutBHandler>>,
         mem_access_hdl: MemAccessHandlerWrapper,
         hv_handler: Option<HypervisorHandler>,
         max_guest_log_level: Option<LevelFilter>,
@@ -445,7 +444,7 @@ impl Hypervisor for KVMDriver {
     fn dispatch_call_from_host(
         &mut self,
         dispatch_func_addr: RawPtr,
-        outb_handle_fn: OutBHandlerWrapper,
+        outb_handle_fn: Arc<Mutex<OutBHandler>>,
         mem_access_fn: MemAccessHandlerWrapper,
         hv_handler: Option<HypervisorHandler>,
         #[cfg(gdb)] dbg_mem_access_fn: DbgMemAccessHandlerWrapper,
@@ -487,7 +486,7 @@ impl Hypervisor for KVMDriver {
         data: Vec<u8>,
         _rip: u64,
         _instruction_length: u64,
-        outb_handle_fn: OutBHandlerWrapper,
+        outb_handle_fn: Arc<Mutex<OutBHandler>>,
     ) -> Result<()> {
         // KVM does not need RIP or instruction length, as it automatically sets the RIP
 

src/hyperlight_host/src/hypervisor/mod.rs

@@ -67,9 +67,7 @@ use gdb::VcpuStopReason;
 
 #[cfg(gdb)]
 use self::handlers::{DbgMemAccessHandlerCaller, DbgMemAccessHandlerWrapper};
-use self::handlers::{
-    MemAccessHandlerCaller, MemAccessHandlerWrapper, OutBHandlerCaller, OutBHandlerWrapper,
-};
+use self::handlers::{MemAccessHandlerCaller, MemAccessHandlerWrapper, OutBHandler};
 use crate::hypervisor::hypervisor_handler::HypervisorHandler;
 use crate::mem::ptr::RawPtr;
 
@@ -124,7 +122,7 @@ pub(crate) trait Hypervisor: Debug + Sync + Send {
         peb_addr: RawPtr,
         seed: u64,
         page_size: u32,
-        outb_handle_fn: OutBHandlerWrapper,
+        outb_handle_fn: Arc<Mutex<OutBHandler>>,
         mem_access_fn: MemAccessHandlerWrapper,
         hv_handler: Option<HypervisorHandler>,
         guest_max_log_level: Option<LevelFilter>,
@@ -141,7 +139,7 @@ pub(crate) trait Hypervisor: Debug + Sync + Send {
     fn dispatch_call_from_host(
         &mut self,
         dispatch_func_addr: RawPtr,
-        outb_handle_fn: OutBHandlerWrapper,
+        outb_handle_fn: Arc<Mutex<OutBHandler>>,
         mem_access_fn: MemAccessHandlerWrapper,
         hv_handler: Option<HypervisorHandler>,
         #[cfg(gdb)] dbg_mem_access_fn: DbgMemAccessHandlerWrapper,
@@ -154,7 +152,7 @@ pub(crate) trait Hypervisor: Debug + Sync + Send {
         data: Vec<u8>,
         rip: u64,
         instruction_length: u64,
-        outb_handle_fn: OutBHandlerWrapper,
+        outb_handle_fn: Arc<Mutex<OutBHandler>>,
     ) -> Result<()>;
 
     /// Run the vCPU
@@ -254,7 +252,7 @@ impl VirtualCPU {
     pub fn run(
         hv: &mut dyn Hypervisor,
         hv_handler: Option<HypervisorHandler>,
-        outb_handle_fn: Arc<Mutex<dyn OutBHandlerCaller>>,
+        outb_handle_fn: Arc<Mutex<OutBHandler>>,
         mem_access_fn: Arc<Mutex<dyn MemAccessHandlerCaller>>,
         #[cfg(gdb)] dbg_mem_access_fn: Arc<Mutex<dyn DbgMemAccessHandlerCaller>>,
     ) -> Result<()> {
@@ -341,7 +339,7 @@ pub(crate) mod tests {
 
     #[cfg(gdb)]
     use super::handlers::DbgMemAccessHandlerWrapper;
-    use super::handlers::{MemAccessHandlerWrapper, OutBHandlerWrapper};
+    use super::handlers::{MemAccessHandlerWrapper, OutBHandler};
     use crate::hypervisor::hypervisor_handler::{
         HvHandlerConfig, HypervisorHandler, HypervisorHandlerAction,
     };
@@ -351,7 +349,7 @@ pub(crate) mod tests {
     use crate::{new_error, Result};
 
     pub(crate) fn test_initialise(
-        outb_hdl: OutBHandlerWrapper,
+        outb_hdl: Arc<Mutex<OutBHandler>>,
         mem_access_hdl: MemAccessHandlerWrapper,
         #[cfg(gdb)] dbg_mem_access_fn: DbgMemAccessHandlerWrapper,
     ) -> Result<()> {

src/hyperlight_host/src/sandbox/outb.rs

@@ -26,7 +26,7 @@ use tracing_log::format_trace;
 
 use super::host_funcs::FunctionRegistry;
 use super::mem_mgr::MemMgrWrapper;
-use crate::hypervisor::handlers::{OutBHandler, OutBHandlerFunction, OutBHandlerWrapper};
+use crate::hypervisor::handlers::{OutBHandler, OutBHandlerFunction};
 use crate::mem::mgr::SandboxMemoryManager;
 use crate::mem::shared_mem::HostSharedMemory;
 use crate::{new_error, HyperlightError, Result};
@@ -184,14 +184,14 @@ fn handle_outb_impl(
 }
 
 /// Given a `MemMgrWrapper` and ` HostFuncsWrapper` -- both passed by _value_
-///  -- return an `OutBHandlerWrapper` wrapping the core OUTB handler logic.
+///  -- return an `Arc<Mutex<OutBHandler>>` wrapping the core OUTB handler logic.
 ///
 /// TODO: pass at least the `host_funcs_wrapper` param by reference.
 #[instrument(skip_all, parent = Span::current(), level= "Trace")]
 pub(crate) fn outb_handler_wrapper(
     mut mem_mgr_wrapper: MemMgrWrapper<HostSharedMemory>,
     host_funcs_wrapper: Arc<Mutex<FunctionRegistry>>,
-) -> OutBHandlerWrapper {
+) -> Arc<Mutex<OutBHandler>> {
     let outb_func: OutBHandlerFunction = Box::new(move |port, payload| {
         handle_outb_impl(
             &mut mem_mgr_wrapper,