Use box now that the enum contains xmm registers which are large

Signed-off-by: James Sturtevant <jsturtevant@gmail.com>

Author: jsturtevant

src/hyperlight_host/examples/guest-debugging/main.rs

@@ -104,6 +104,7 @@ mod tests {
     use std::io;
     use std::process::{Command, Stdio};
     use std::time::Duration;
+    use serial_test::serial;
 
     use hyperlight_host::{Result, new_error};
     use io::{BufReader, BufWriter, Read, Write};

src/hyperlight_host/src/hypervisor/gdb/mod.rs

@@ -142,7 +142,7 @@ pub(crate) enum DebugMsg {
     RemoveSwBreakpoint(u64),
     Step,
     WriteAddr(u64, Vec<u8>),
-    WriteRegisters(X86_64Regs),
+    WriteRegisters(Box<X86_64Regs>),
 }
 
 /// Enumerates the possible responses that a hypervisor can provide to a debugger
@@ -157,7 +157,7 @@ pub(crate) enum DebugResponse {
     NotAllowed,
     InterruptHandle(Arc<dyn InterruptHandle>),
     ReadAddr(Vec<u8>),
-    ReadRegisters(X86_64Regs),
+    ReadRegisters(Box<X86_64Regs>),
     RemoveHwBreakpoint(bool),
     RemoveSwBreakpoint(bool),
     Step,
@@ -451,7 +451,7 @@ mod tests {
         let res = gdb_conn.try_recv();
         assert!(res.is_err());
 
-        let res = hyp_conn.send(DebugResponse::ReadRegisters(X86_64Regs::default()));
+        let res = hyp_conn.send(DebugResponse::ReadRegisters(Box::default()));
         assert!(res.is_ok());
 
         let res = gdb_conn.recv();

src/hyperlight_host/src/hypervisor/gdb/x86_64_target.rs

@@ -273,7 +273,7 @@ impl SingleThreadBase for HyperlightSandboxTarget {
             mxcsr: regs.mxcsr,
         };
 
-        match self.send_command(DebugMsg::WriteRegisters(regs))? {
+        match self.send_command(DebugMsg::WriteRegisters(Box::new(regs)))? {
             DebugResponse::WriteRegisters => Ok(()),
             DebugResponse::NotAllowed => {
                 log::error!("Action not allowed at this time, crash might have occurred");
@@ -486,7 +486,7 @@ mod tests {
 
         // Check response to read registers - send the response first to not be blocked
         // by the recv call in the target
-        let msg = DebugResponse::ReadRegisters(X86_64Regs::default());
+        let msg = DebugResponse::ReadRegisters(Box::default());
         let res = gdb_conn.send(msg);
         assert!(res.is_ok());
 

src/hyperlight_host/src/hypervisor/hyperv_linux.rs

@@ -202,7 +202,7 @@ mod debug {
 
                                 e
                             })
-                            .map(|_| DebugResponse::ReadRegisters(regs))
+                            .map(|_| DebugResponse::ReadRegisters(Box::new(regs)))
                     }
                     DebugMsg::RemoveHwBreakpoint(addr) => Ok(DebugResponse::RemoveHwBreakpoint(
                         debug

src/hyperlight_host/src/hypervisor/hyperv_windows.rs

@@ -185,7 +185,7 @@ mod debug {
 
                                 e
                             })
-                            .map(|_| DebugResponse::ReadRegisters(regs))
+                            .map(|_| DebugResponse::ReadRegisters(Box::new(regs)))
                     }
                     DebugMsg::RemoveHwBreakpoint(addr) => Ok(DebugResponse::RemoveHwBreakpoint(
                         debug

src/hyperlight_host/src/hypervisor/kvm.rs

@@ -194,7 +194,7 @@ mod debug {
 
                                 e
                             })
-                            .map(|_| DebugResponse::ReadRegisters(regs))
+                            .map(|_| DebugResponse::ReadRegisters(Box::new(regs)))
                     }
                     DebugMsg::RemoveHwBreakpoint(addr) => Ok(DebugResponse::RemoveHwBreakpoint(
                         debug