Split SandboxInstance::get_global_val implementation per backend (#11234)

substrate/client/executor/common/src/sandbox/wasmer_backend.rs

@@ -432,3 +432,17 @@ impl MemoryTransfer for MemoryWrapper {
 		}
 	}
 }
+
+/// Get global value by name
+pub fn get_global(instance: &wasmer::Instance, name: &str) -> Option<Value> {
+	let global = instance.exports.get_global(name).ok()?;
+	let wasmtime_value = match global.get() {
+		wasmer::Val::I32(val) => Value::I32(val),
+		wasmer::Val::I64(val) => Value::I64(val),
+		wasmer::Val::F32(val) => Value::F32(f32::to_bits(val)),
+		wasmer::Val::F64(val) => Value::F64(f64::to_bits(val)),
+		_ => None?,
+	};
+
+	Some(wasmtime_value)
+}

substrate/client/executor/common/src/sandbox/wasmi_backend.rs

@@ -321,3 +321,8 @@ pub fn invoke(
 		})
 	})
 }
+
+/// Get global value by name
+pub fn get_global(instance: &wasmi::ModuleRef, name: &str) -> Option<Value> {
+	Some(instance.export_by_name(name)?.as_global()?.get().into())
+}