c-api: support disabling mach ports use on macos (#7595)

Author: casimiro

crates/c-api/include/wasmtime/config.h

@@ -367,6 +367,17 @@ WASM_API_EXTERN void wasmtime_config_cranelift_flag_enable(wasm_config_t*, const
  */
 WASM_API_EXTERN void wasmtime_config_cranelift_flag_set(wasm_config_t*, const char *key, const char *value);
 
+/**
+ * \brief Configures whether, when on macOS, Mach ports are used for exception handling
+ * instead of traditional Unix-based signal handling.
+ *
+ * This option defaults to true, using Mach ports by default.
+ *
+ * For more information see the Rust documentation at
+ * https://docs.wasmtime.dev/api/wasmtime/struct.Config.html#method.macos_use_mach_ports
+ */
+WASMTIME_CONFIG_PROP(void, macos_use_mach_ports, bool)
+
 
 /**
  * Return the data from a LinearMemory instance.

crates/c-api/src/config.rs

@@ -240,6 +240,11 @@ pub unsafe extern "C" fn wasmtime_config_target_set(
     handle_result(c.config.target(target), |_cfg| {})
 }
 
+#[no_mangle]
+pub extern "C" fn wasmtime_config_macos_use_mach_ports_set(c: &mut wasm_config_t, enabled: bool) {
+    c.config.macos_use_mach_ports(enabled);
+}
+
 #[no_mangle]
 pub unsafe extern "C" fn wasmtime_config_cranelift_flag_enable(
     c: &mut wasm_config_t,