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use crate::externals::Func; use crate::r#ref::{AnyRef, HostRef}; use crate::runtime::Store; use crate::types::ValType; use cranelift_codegen::ir; use std::ptr; use wasmtime_jit::RuntimeValue; #[derive(Debug, Clone)] pub enum Val { I32(i32), I64(i64), F32(u32), F64(u64), AnyRef(AnyRef), FuncRef(HostRef<Func>), } impl Val { pub fn default() -> Val { Val::AnyRef(AnyRef::null()) } pub fn r#type(&self) -> ValType { match self { Val::I32(_) => ValType::I32, Val::I64(_) => ValType::I64, Val::F32(_) => ValType::F32, Val::F64(_) => ValType::F64, Val::AnyRef(_) => ValType::AnyRef, Val::FuncRef(_) => ValType::FuncRef, } } pub(crate) unsafe fn write_value_to(&self, p: *mut i64) { match self { Val::I32(i) => ptr::write(p as *mut i32, *i), Val::I64(i) => ptr::write(p as *mut i64, *i), Val::F32(u) => ptr::write(p as *mut u32, *u), Val::F64(u) => ptr::write(p as *mut u64, *u), _ => unimplemented!("Val::write_value_to"), } } pub(crate) unsafe fn read_value_from(p: *const i64, ty: ir::Type) -> Val { match ty { ir::types::I32 => Val::I32(ptr::read(p as *const i32)), ir::types::I64 => Val::I64(ptr::read(p as *const i64)), ir::types::F32 => Val::F32(ptr::read(p as *const u32)), ir::types::F64 => Val::F64(ptr::read(p as *const u64)), _ => unimplemented!("Val::read_value_from"), } } pub fn from_f32_bits(v: u32) -> Val { Val::F32(v) } pub fn from_f64_bits(v: u64) -> Val { Val::F64(v) } pub fn i32(&self) -> i32 { if let Val::I32(i) = self { *i } else { panic!("Invalid conversion of {:?} to i32.", self); } } pub fn i64(&self) -> i64 { if let Val::I64(i) = self { *i } else { panic!("Invalid conversion of {:?} to i64.", self); } } pub fn f32(&self) -> f32 { RuntimeValue::F32(self.f32_bits()).unwrap_f32() } pub fn f64(&self) -> f64 { RuntimeValue::F64(self.f64_bits()).unwrap_f64() } pub fn f32_bits(&self) -> u32 { if let Val::F32(i) = self { *i } else { panic!("Invalid conversion of {:?} to f32.", self); } } pub fn f64_bits(&self) -> u64 { if let Val::F64(i) = self { *i } else { panic!("Invalid conversion of {:?} to f64.", self); } } } impl From<i32> for Val { fn from(val: i32) -> Val { Val::I32(val) } } impl From<i64> for Val { fn from(val: i64) -> Val { Val::I64(val) } } impl From<f32> for Val { fn from(val: f32) -> Val { Val::F32(val.to_bits()) } } impl From<f64> for Val { fn from(val: f64) -> Val { Val::F64(val.to_bits()) } } impl Into<i32> for Val { fn into(self) -> i32 { self.i32() } } impl Into<i64> for Val { fn into(self) -> i64 { self.i64() } } impl Into<f32> for Val { fn into(self) -> f32 { self.f32() } } impl Into<f64> for Val { fn into(self) -> f64 { self.f64() } } impl From<AnyRef> for Val { fn from(val: AnyRef) -> Val { match &val { AnyRef::Ref(r) => { if r.is_ref::<Func>() { Val::FuncRef(r.get_ref()) } else { Val::AnyRef(val) } } _ => unimplemented!("AnyRef::Other"), } } } impl From<HostRef<Func>> for Val { fn from(val: HostRef<Func>) -> Val { Val::FuncRef(val) } } impl Into<AnyRef> for Val { fn into(self) -> AnyRef { match self { Val::AnyRef(r) => r, Val::FuncRef(f) => f.anyref(), _ => panic!("Invalid conversion of {:?} to anyref.", self), } } } impl From<RuntimeValue> for Val { fn from(rv: RuntimeValue) -> Self { match rv { RuntimeValue::I32(i) => Val::I32(i), RuntimeValue::I64(i) => Val::I64(i), RuntimeValue::F32(u) => Val::F32(u), RuntimeValue::F64(u) => Val::F64(u), x => { panic!("unsupported {:?}", x); } } } } impl Into<RuntimeValue> for Val { fn into(self) -> RuntimeValue { match self { Val::I32(i) => RuntimeValue::I32(i), Val::I64(i) => RuntimeValue::I64(i), Val::F32(u) => RuntimeValue::F32(u), Val::F64(u) => RuntimeValue::F64(u), x => { panic!("unsupported {:?}", x); } } } } pub(crate) fn into_checked_anyfunc( val: Val, store: &HostRef<Store>, ) -> wasmtime_runtime::VMCallerCheckedAnyfunc { match val { Val::AnyRef(AnyRef::Null) => wasmtime_runtime::VMCallerCheckedAnyfunc { func_ptr: ptr::null(), type_index: wasmtime_runtime::VMSharedSignatureIndex::default(), vmctx: ptr::null_mut(), }, Val::FuncRef(f) => { let f = f.borrow(); let (vmctx, func_ptr, signature) = match f.wasmtime_export() { wasmtime_runtime::Export::Function { vmctx, address, signature, } => (*vmctx, *address, signature), _ => panic!("expected function export"), }; let type_index = store.borrow_mut().register_cranelift_signature(signature); wasmtime_runtime::VMCallerCheckedAnyfunc { func_ptr, type_index, vmctx, } } _ => panic!("val is not funcref"), } } pub(crate) fn from_checked_anyfunc( item: &wasmtime_runtime::VMCallerCheckedAnyfunc, store: &HostRef<Store>, ) -> Val { if item.type_index == wasmtime_runtime::VMSharedSignatureIndex::default() { return Val::AnyRef(AnyRef::Null); } let signature = store .borrow() .lookup_cranelift_signature(item.type_index) .expect("signature") .clone(); let instance_handle = unsafe { wasmtime_runtime::InstanceHandle::from_vmctx(item.vmctx) }; let export = wasmtime_runtime::Export::Function { address: item.func_ptr, signature, vmctx: item.vmctx, }; let f = Func::from_wasmtime_function(export, store, instance_handle); Val::FuncRef(HostRef::new(f)) }