mirror of
https://github.com/pjh456/OxideJS.git
synced 2026-10-24 02:31:13 +08:00
229 lines
9.9 KiB
Rust
229 lines
9.9 KiB
Rust
use std::sync::{Arc, OnceLock};
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use oxide_bytecode::module::CompiledModule;
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use crate::vm::{CallFrame, InlineSyncState, Vm};
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use crate::{vm_debug, vm_info, vm_trace, vm_warn};
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use oxide_types::object::JsObject;
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use oxide_types::value::JsValue;
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impl Vm {
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pub(crate) fn call_bytecode_function_inline(
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&mut self, callee: JsValue, callee_obj: &JsObject, receiver: JsValue, args: &[JsValue],
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) -> Result<JsValue, String> {
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if callee_obj.sub_module_index() == 0 {
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return Err(self.error_message_text("TypeError", "accessor is not callable"));
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}
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let sub_idx = callee_obj.sub_module_index() as usize - 1;
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vm_debug!(
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"call_bytecode_function_inline: sub_idx={}, args={}, depth={}",
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sub_idx,
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args.len(),
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self.frames.len()
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);
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if sub_idx >= self.sub_modules.len() {
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return Err(format!(
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"accessor sub_module_index {} out of bounds (max {})",
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sub_idx,
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self.sub_modules.len()
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));
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}
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if self.frames.len() >= self.kernel_core.config.max_call_depth {
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self.raise_error_kind("RangeError", "Maximum call stack size exceeded")?;
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return Ok(JsValue::undefined());
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}
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if self.native_call_depth >= self.kernel_core.config.max_call_depth {
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self.raise_error_kind("RangeError", "Maximum call stack size exceeded")?;
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return Ok(JsValue::undefined());
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}
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self.native_call_depth += 1;
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let subs = Arc::clone(&self.sub_modules);
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let sub = &subs[sub_idx];
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vm_trace!("call_bytecode: saving state pc={} depth={}", self.pc, self.frames.len());
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let saved = Box::new(InlineSyncState {
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regs: Box::new(self.regs),
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pc: self.pc,
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bytecode: std::mem::take(&mut self.bytecode),
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active_immutables: self.active_immutables,
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active_reg_limit: self.active_reg_limit,
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root_reg_limit: self.root_reg_limit,
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try_stack: std::mem::take(&mut self.try_stack),
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frames: std::mem::take(&mut self.frames),
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exception_value: self.exception_value.take(),
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pending_exception: self.pending_exception.take(),
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pending_error_kind: self.pending_error_kind.take(),
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for_in_iters: std::mem::take(&mut self.iters.for_in_iters),
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for_of_iters: std::mem::take(&mut self.iters.for_of_iters),
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last_for_of_result: self.iters.last_for_of_result,
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saved_bytecode_stack: std::mem::take(&mut self.saved_bytecode_stack),
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saved_immutables_stack: std::mem::take(&mut self.saved_immutables_stack),
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save_stack: std::mem::take(&mut self.save_stack),
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cell_stack: std::mem::take(&mut self.cell_stack),
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});
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self.regs = [JsValue::undefined(); 256];
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self.pc = 0;
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self.bytecode = sub.bytecode.clone();
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self.activate_immutables(sub_idx + 1, &sub.constants);
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self.active_reg_limit = sub.n_registers.max(1);
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self.root_reg_limit = self.active_reg_limit;
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for i in 0..sub.n_args as usize {
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self.regs[sub.param_base as usize + i] = args.get(i).copied().unwrap_or(JsValue::undefined());
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}
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self.regs[254] = if sub.is_arrow { callee_obj.captured_this() } else { receiver };
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self.regs[255] = JsValue::undefined();
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for (name, reg) in &sub.builtin_reg_map {
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let si = self.kernel_core.perm_interner().intern(name.as_str()).0;
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let global = self.session.global_object();
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if let Some(pos) = self.kernel_core.shape_forge().lookup_position(global.shape_id(), si) {
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self.regs[*reg as usize] = global.get_prop_at(pos);
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}
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}
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let _ = callee;
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vm_trace!(
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"call_bytecode: dispatching sub_idx={} n_regs={} n_args={} arrow={}",
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sub_idx,
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sub.n_registers,
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sub.n_args,
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sub.is_arrow
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);
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let result = self.dispatch();
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self.native_call_depth -= 1;
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vm_trace!("call_bytecode: restoring state pc={} result={:?}", saved.pc, result.as_ref().ok());
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self.regs = *saved.regs;
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self.pc = saved.pc;
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self.bytecode = saved.bytecode;
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self.active_immutables = saved.active_immutables;
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self.active_reg_limit = saved.active_reg_limit;
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self.root_reg_limit = saved.root_reg_limit;
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self.try_stack = saved.try_stack;
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self.frames = saved.frames;
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self.exception_value = saved.exception_value;
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self.pending_exception = saved.pending_exception;
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self.pending_error_kind = saved.pending_error_kind;
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self.iters.for_in_iters = saved.for_in_iters;
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self.iters.for_of_iters = saved.for_of_iters;
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self.iters.last_for_of_result = saved.last_for_of_result;
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self.saved_bytecode_stack = saved.saved_bytecode_stack;
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self.saved_immutables_stack = saved.saved_immutables_stack;
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self.save_stack = saved.save_stack;
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self.cell_stack = saved.cell_stack;
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result
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}
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pub(crate) fn restore_frame(&mut self, frame: CallFrame) {
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vm_trace!(
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"restore_frame: return_addr={} caller_reg_limit={}",
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frame.return_addr,
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frame.caller_reg_limit
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);
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if let Some(saved_bc) = self.saved_bytecode_stack.pop() {
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self.bytecode = saved_bc;
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}
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if let Some(saved_imm) = self.saved_immutables_stack.pop() {
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self.active_immutables = saved_imm;
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}
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if let Some(saved_subs) = self.sub_module_stack.pop() {
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self.sub_modules = saved_subs;
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}
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self.temp_immutables.pop();
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let offset = frame.saved_reg_offset as usize;
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let len = frame.caller_reg_limit as usize;
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self.regs[..len].copy_from_slice(&self.save_stack[offset..offset + len]);
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self.save_stack.truncate(offset);
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self.regs[254] = frame.saved_this;
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self.regs[255] = frame.saved_new_target;
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self.active_reg_limit = frame.caller_reg_limit;
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self.pc = frame.return_addr;
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}
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/// 重新执行当前已加载的 bytecode：清空执行状态并重置 IC 缓存后再次 dispatch。
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pub fn rerun(&mut self) -> Result<JsValue, String> {
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vm_info!("rerun: clearing IC caches");
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self.clear_execution_state();
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self.active_reg_limit = self.root_reg_limit;
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crate::ic_helper::clear_ic_caches(&mut self.bytecode);
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self.dispatch()
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}
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/// 加载并执行一个已编译模块，返回模块顶层执行结果或未捕获异常消息。
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///
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/// 内部初始化寄存器/bytecode/immutables 与 builtin 寄存器预绑定，然后进入
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/// dispatch 主循环；执行完成或异常展开后返回。
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pub fn run(&mut self, module: &CompiledModule) -> Result<JsValue, String> {
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vm_debug!("run: starting bytecode execution, {} instructions", module.bytecode.len());
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self.clear_execution_state();
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self.cell_stack.clear();
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self.cell_stack.push(Vec::new());
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self.sub_modules = Arc::new(module.sub_modules.clone());
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self.immutables_cache = (0..=self.sub_modules.len()).map(|_| OnceLock::new()).collect();
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self.bytecode = module.bytecode.clone();
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self.activate_immutables(0, &module.constants);
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self.root_reg_limit = module.n_registers.max(1);
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self.active_reg_limit = self.root_reg_limit;
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for (name, reg) in &module.builtin_reg_map {
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let si = self.kernel_core.perm_interner().intern(name.as_str()).0;
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let global = self.session.global_object();
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if let Some(pos) = self.kernel_core.shape_forge().lookup_position(global.shape_id(), si) {
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self.regs[*reg as usize] = global.get_prop_at(pos);
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}
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}
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self.regs[254] = JsValue::undefined();
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self.dispatch()
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}
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pub(crate) fn unwind(&mut self) -> Result<(), String> {
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vm_debug!("unwind: {} try handlers on stack", self.try_stack.len());
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while let Some(handler) = self.try_stack.pop() {
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while self.frames.len() > handler.frame_depth {
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if let Some(frame) = self.frames.pop() {
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self.restore_frame(frame);
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}
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}
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// IteratorClose any for-of loops abandoned inside this handler's scope.
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self.close_for_of_above(handler.for_of_depth);
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if let Some(finally_pc) = handler.finally_pc {
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vm_trace!("unwind: entering finally at pc={}", finally_pc);
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if self.pending_exception.is_none() {
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self.pending_exception = self.exception_value.take();
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}
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self.try_stack.push(handler);
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self.pc = finally_pc;
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return Ok(());
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}
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if let Some(catch_pc) = handler.catch_pc {
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vm_trace!("unwind: caught at pc={}", catch_pc);
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let exc = self.exception_value.take().unwrap_or(JsValue::undefined());
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self.regs[0] = exc;
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self.pc = catch_pc;
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return Ok(());
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}
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}
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self.close_for_of_above(0);
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while let Some(frame) = self.frames.pop() {
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self.restore_frame(frame);
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}
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let exc = self.exception_value.take().unwrap_or(JsValue::undefined());
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// Preserve the escaping JsValue so a for-of next()-throw can re-throw the original
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// value instead of the flattened string (consumed by dispatch_for_of_done/next).
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self.last_uncaught_value = Some(exc);
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let kind_str = self.pending_error_kind.take().unwrap_or("Error");
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let exc_text = self.error_text(exc);
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let msg = if exc_text.starts_with(kind_str) {
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format!("uncaught {exc_text}")
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} else {
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format!("uncaught {kind_str}: {exc_text}")
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};
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vm_warn!("unwind: uncaught {}: {}", kind_str, exc_text);
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Err(msg)
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}
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}
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