Remove Hypervisor-Handler thread, and timeout-based config

Signed-off-by: Ludvig Liljenberg <4257730+ludfjig@users.noreply.github.com>

Author: ludfjig

Justfile

@@ -83,14 +83,12 @@ test-unit target=default-target features="":
 test-isolated target=default-target features="":
     cargo test {{ if features =="" {''} else if features=="no-default-features" {"--no-default-features" } else {"--no-default-features -F " + features } }} --profile={{ if target == "debug" { "dev" } else { target } }} -p hyperlight-host --lib -- sandbox::uninitialized::tests::test_trace_trace --exact --ignored
     cargo test {{ if features =="" {''} else if features=="no-default-features" {"--no-default-features" } else {"--no-default-features -F " + features } }} --profile={{ if target == "debug" { "dev" } else { target } }} -p hyperlight-host --lib -- sandbox::uninitialized::tests::test_log_trace --exact --ignored
-    cargo test {{ if features =="" {''} else if features=="no-default-features" {"--no-default-features" } else {"--no-default-features -F " + features } }} --profile={{ if target == "debug" { "dev" } else { target } }} -p hyperlight-host --lib -- hypervisor::hypervisor_handler::tests::create_1000_sandboxes --exact --ignored
+    cargo test {{ if features =="" {''} else if features=="no-default-features" {"--no-default-features" } else {"--no-default-features -F " + features } }} --profile={{ if target == "debug" { "dev" } else { target } }} -p hyperlight-host --lib -- sandbox::initialized_multi_use::tests::create_1000_sandboxes --exact --ignored
     cargo test {{ if features =="" {''} else if features=="no-default-features" {"--no-default-features" } else {"--no-default-features -F " + features } }} --profile={{ if target == "debug" { "dev" } else { target } }} -p hyperlight-host --lib -- sandbox::outb::tests::test_log_outb_log --exact --ignored
     cargo test {{ if features =="" {''} else if features=="no-default-features" {"--no-default-features" } else {"--no-default-features -F " + features } }} --profile={{ if target == "debug" { "dev" } else { target } }} -p hyperlight-host --lib -- mem::shared_mem::tests::test_drop --exact --ignored
     cargo test {{ if features =="" {''} else if features=="no-default-features" {"--no-default-features" } else {"--no-default-features -F " + features } }} --profile={{ if target == "debug" { "dev" } else { target } }} -p hyperlight-host --test integration_test -- log_message --exact --ignored
     @# metrics tests
-    cargo test {{ if features =="" {''} else if features=="no-default-features" {"--no-default-features" } else {"--no-default-features -F " + features } }} --profile={{ if target == "debug" { "dev" } else { target } }} -p hyperlight-host --lib -- metrics::tests::test_metrics_are_emitted --exact --ignored
-    cargo test {{ if features =="" {''} else if features=="no-default-features" {"--no-default-features" } else {"--no-default-features -F function_call_metrics," + features } }} --profile={{ if target == "debug" { "dev" } else { target } }} -p hyperlight-host --lib -- metrics::tests::test_metrics_are_emitted --exact --ignored
-    
+    cargo test {{ if features =="" {''} else if features=="no-default-features" {"--no-default-features" } else {"--no-default-features -F function_call_metrics," + features } }} --profile={{ if target == "debug" { "dev" } else { target } }} -p hyperlight-host --lib -- metrics::tests::test_metrics_are_emitted --exact 
 # runs integration tests. Guest can either be "rust" or "c"
 test-integration guest target=default-target features="":
     @# run execute_on_heap test with feature "executable_heap" on and off

src/hyperlight_host/benches/benchmarks.rs

@@ -14,8 +14,6 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-use std::time::Duration;
-
 use criterion::{criterion_group, criterion_main, Criterion};
 use hyperlight_host::sandbox::{MultiUseSandbox, SandboxConfiguration, UninitializedSandbox};
 use hyperlight_host::sandbox_state::sandbox::EvolvableSandbox;
@@ -68,7 +66,6 @@ fn guest_call_benchmark(c: &mut Criterion) {
         let mut config = SandboxConfiguration::default();
         config.set_input_data_size(2 * SIZE + (1024 * 1024)); // 2 * SIZE + 1 MB, to allow 1MB for the rest of the serialized function call
         config.set_heap_size(SIZE as u64 * 15);
-        config.set_max_execution_time(Duration::from_secs(10));
 
         let sandbox = UninitializedSandbox::new(
             GuestBinary::FilePath(simple_guest_as_string().unwrap()),

src/hyperlight_host/src/error.rs

@@ -122,22 +122,6 @@ pub enum HyperlightError {
     #[error("HostFunction {0} was not found")]
     HostFunctionNotFound(String),
 
-    /// An attempt to communicate with or from the Hypervisor Handler thread failed
-    /// (i.e., usually a failure call to `.send()` or `.recv()` on a message passing
-    /// channel)
-    #[error("Communication failure with the Hypervisor Handler thread")]
-    HypervisorHandlerCommunicationFailure(),
-
-    /// An attempt to cancel a Hypervisor Handler execution failed.
-    /// See `terminate_hypervisor_handler_execution_and_reinitialise`
-    /// for more details.
-    #[error("Hypervisor Handler execution cancel attempt on a finished execution")]
-    HypervisorHandlerExecutionCancelAttemptOnFinishedExecution(),
-
-    /// A Receive for a Hypervisor Handler Message Timedout
-    #[error("Hypervisor Handler Message Receive Timedout")]
-    HypervisorHandlerMessageReceiveTimedout(),
-
     /// Reading Writing or Seeking data failed.
     #[error("Reading Writing or Seeking data failed {0:?}")]
     IOError(#[from] std::io::Error),

src/hyperlight_host/src/func/call_ctx.rs

@@ -16,7 +16,6 @@ limitations under the License.
 
 use tracing::{instrument, Span};
 
-use super::guest_dispatch::call_function_on_guest;
 use super::{ParameterTuple, SupportedReturnType};
 use crate::{MultiUseSandbox, Result};
 /// A context for calling guest functions.
@@ -69,8 +68,11 @@ impl MultiUseGuestCallContext {
         // !Send (and !Sync), we also don't need to worry about
         // synchronization
 
-        let ret =
-            call_function_on_guest(&mut self.sbox, func_name, Output::TYPE, args.into_value());
+        let ret = self.sbox.call_guest_function_by_name_no_reset(
+            func_name,
+            Output::TYPE,
+            args.into_value(),
+        );
         Output::from_value(ret?)
     }