Add support for ext_panic_handler_abort_on_panic_version_1

lib/src/executor/host.rs

@@ -2142,7 +2142,7 @@ impl ReadyToRun {
                     return HostVm::Error {
                         error: Error::Utf8Error {
                             function: host_fn.name(),
-                            param_num: 2,
+                            param_num: 1,
                             error,
                         },
                         prototype: self.inner.into_prototype(),
@@ -2183,6 +2183,27 @@ impl ReadyToRun {
             HostFunction::ext_logging_max_level_version_1 => {
                 HostVm::GetMaxLogLevel(GetMaxLogLevel { inner: self.inner })
             }
+            HostFunction::ext_panic_handler_abort_on_panic_version_1 => {
+                let message = {
+                    let message_bytes = expect_pointer_size!(0);
+                    str::from_utf8(message_bytes.as_ref()).map(|msg| msg.to_owned())
+                };
+
+                match message {
+                    Ok(message) => HostVm::Error {
+                        error: Error::AbortOnPanic { message },
+                        prototype: self.inner.into_prototype(),
+                    },
+                    Err(error) => HostVm::Error {
+                        error: Error::Utf8Error {
+                            function: host_fn.name(),
+                            param_num: 0,
+                            error,
+                        },
+                        prototype: self.inner.into_prototype(),
+                    },
+                }
+            }
         }
     }
 }
@@ -3901,6 +3922,12 @@ pub enum Error {
     /// Error in the Wasm code execution.
     #[display(fmt = "{_0}")]
     Trap(vm::Trap),
+    /// Runtime has called the `ext_panic_handler_abort_on_panic_version_1` host function.
+    #[display(fmt = "Runtime has aborted: {message:?}")]
+    AbortOnPanic {
+        /// Message generated by the runtime.
+        message: String,
+    },
     /// A non-`i64` value has been returned by the Wasm entry point.
     #[display(fmt = "A non-I64 value has been returned: {actual:?}")]
     BadReturnValue {

lib/src/executor/host/functions.rs

@@ -154,6 +154,7 @@ host_functions! {
     ext_allocator_free_version_1,
     ext_logging_log_version_1,
     ext_logging_max_level_version_1,
+    ext_panic_handler_abort_on_panic_version_1,
 }
 
 impl HostFunction {
@@ -448,6 +449,9 @@ impl HostFunction {
             HostFunction::ext_logging_max_level_version_1 => {
                 crate::signature!(() => vm::ValueType::I32)
             }
+            HostFunction::ext_panic_handler_abort_on_panic_version_1 => {
+                crate::signature!((vm::ValueType::I64) => ())
+            }
         }
     }
 }

wasm-node/CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Changed
 
 - Most of the log messages emitted by smoldot have been modified in order to unify their syntax and be easier to parse programatically. ([#1560](https://github.com/smol-dot/smoldot/pull/1560))
+- Added support for the `ext_panic_handler_abort_on_panic_version_1` host function. ([#1573](https://github.com/smol-dot/smoldot/pull/1573))
 
 ### Fixed