mirror of
https://github.com/denoland/deno.git
synced 2024-10-29 08:58:01 -04:00
8d82ba7299
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com> Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com>
466 lines
15 KiB
Rust
466 lines
15 KiB
Rust
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
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use crate::error::is_instance_of_error;
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use crate::modules::get_asserted_module_type_from_assertions;
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use crate::modules::parse_import_assertions;
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use crate::modules::validate_import_assertions;
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use crate::modules::ImportAssertionsKind;
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use crate::modules::ModuleMap;
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use crate::ops::OpCtx;
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use crate::JsRuntime;
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use log::debug;
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use once_cell::sync::Lazy;
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use std::option::Option;
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use std::os::raw::c_void;
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use v8::MapFnTo;
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pub static EXTERNAL_REFERENCES: Lazy<v8::ExternalReferences> =
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Lazy::new(|| {
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v8::ExternalReferences::new(&[v8::ExternalReference {
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function: call_console.map_fn_to(),
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}])
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});
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// TODO(nayeemrmn): Move to runtime and/or make `pub(crate)`.
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pub fn script_origin<'a>(
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s: &mut v8::HandleScope<'a>,
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resource_name: v8::Local<'a, v8::String>,
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) -> v8::ScriptOrigin<'a> {
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let source_map_url = v8::String::new(s, "").unwrap();
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v8::ScriptOrigin::new(
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s,
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resource_name.into(),
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0,
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0,
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false,
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123,
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source_map_url.into(),
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true,
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false,
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false,
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)
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}
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pub fn module_origin<'a>(
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s: &mut v8::HandleScope<'a>,
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resource_name: v8::Local<'a, v8::String>,
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) -> v8::ScriptOrigin<'a> {
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let source_map_url = v8::String::new(s, "").unwrap();
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v8::ScriptOrigin::new(
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s,
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resource_name.into(),
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0,
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0,
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false,
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123,
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source_map_url.into(),
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true,
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false,
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true,
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)
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}
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pub fn initialize_context<'s>(
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scope: &mut v8::HandleScope<'s, ()>,
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op_ctxs: &[OpCtx],
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snapshot_loaded: bool,
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) -> v8::Local<'s, v8::Context> {
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let scope = &mut v8::EscapableHandleScope::new(scope);
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let context = v8::Context::new(scope);
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let global = context.global(scope);
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let scope = &mut v8::ContextScope::new(scope, context);
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// Snapshot already registered `Deno.core.ops` but
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// extensions may provide ops that aren't part of the snapshot.
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//
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// TODO(@littledivy): This is extra complexity for
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// a really weird usecase. Remove this once all
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// tsc ops are static at snapshot time.
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if snapshot_loaded {
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// Grab the Deno.core.ops object & init it
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let ops_obj = JsRuntime::grab_global::<v8::Object>(scope, "Deno.core.ops")
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.expect("Deno.core.ops to exist");
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initialize_ops(scope, ops_obj, op_ctxs);
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return scope.escape(context);
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}
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// global.Deno = { core: { } };
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let core_val = JsRuntime::ensure_objs(scope, global, "Deno.core").unwrap();
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// Bind functions to Deno.core.*
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set_func(scope, core_val, "callConsole", call_console);
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// Bind functions to Deno.core.ops.*
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let ops_obj = JsRuntime::ensure_objs(scope, global, "Deno.core.ops").unwrap();
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initialize_ops(scope, ops_obj, op_ctxs);
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scope.escape(context)
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}
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fn initialize_ops(
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scope: &mut v8::HandleScope,
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ops_obj: v8::Local<v8::Object>,
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op_ctxs: &[OpCtx],
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) {
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for ctx in op_ctxs {
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let ctx_ptr = ctx as *const OpCtx as *const c_void;
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set_func_raw(scope, ops_obj, ctx.decl.name, ctx.decl.v8_fn_ptr, ctx_ptr);
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}
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}
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pub fn set_func(
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scope: &mut v8::HandleScope<'_>,
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obj: v8::Local<v8::Object>,
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name: &'static str,
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callback: impl v8::MapFnTo<v8::FunctionCallback>,
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) {
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let key = v8::String::new(scope, name).unwrap();
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let val = v8::Function::new(scope, callback).unwrap();
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val.set_name(key);
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obj.set(scope, key.into(), val.into());
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}
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// Register a raw v8::FunctionCallback
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// with some external data.
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pub fn set_func_raw(
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scope: &mut v8::HandleScope<'_>,
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obj: v8::Local<v8::Object>,
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name: &'static str,
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callback: v8::FunctionCallback,
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external_data: *const c_void,
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) {
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let key = v8::String::new(scope, name).unwrap();
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let external = v8::External::new(scope, external_data as *mut c_void);
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let val = v8::Function::builder_raw(callback)
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.data(external.into())
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.build(scope)
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.unwrap();
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val.set_name(key);
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obj.set(scope, key.into(), val.into());
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}
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pub extern "C" fn host_import_module_dynamically_callback(
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context: v8::Local<v8::Context>,
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_host_defined_options: v8::Local<v8::Data>,
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resource_name: v8::Local<v8::Value>,
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specifier: v8::Local<v8::String>,
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import_assertions: v8::Local<v8::FixedArray>,
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) -> *mut v8::Promise {
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// SAFETY: `CallbackScope` can be safely constructed from `Local<Context>`
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let scope = &mut unsafe { v8::CallbackScope::new(context) };
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// NOTE(bartlomieju): will crash for non-UTF-8 specifier
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let specifier_str = specifier
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.to_string(scope)
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.unwrap()
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.to_rust_string_lossy(scope);
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let referrer_name_str = resource_name
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.to_string(scope)
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.unwrap()
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.to_rust_string_lossy(scope);
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let resolver = v8::PromiseResolver::new(scope).unwrap();
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let promise = resolver.get_promise(scope);
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let assertions = parse_import_assertions(
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scope,
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import_assertions,
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ImportAssertionsKind::DynamicImport,
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);
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{
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let tc_scope = &mut v8::TryCatch::new(scope);
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validate_import_assertions(tc_scope, &assertions);
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if tc_scope.has_caught() {
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let e = tc_scope.exception().unwrap();
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resolver.reject(tc_scope, e);
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}
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}
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let asserted_module_type =
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get_asserted_module_type_from_assertions(&assertions);
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let resolver_handle = v8::Global::new(scope, resolver);
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{
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let state_rc = JsRuntime::state(scope);
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let module_map_rc = JsRuntime::module_map(scope);
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debug!(
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"dyn_import specifier {} referrer {} ",
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specifier_str, referrer_name_str
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);
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ModuleMap::load_dynamic_import(
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module_map_rc,
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&specifier_str,
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&referrer_name_str,
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asserted_module_type,
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resolver_handle,
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);
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state_rc.borrow_mut().notify_new_dynamic_import();
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}
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// Map errors from module resolution (not JS errors from module execution) to
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// ones rethrown from this scope, so they include the call stack of the
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// dynamic import site. Error objects without any stack frames are assumed to
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// be module resolution errors, other exception values are left as they are.
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let map_err = |scope: &mut v8::HandleScope,
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args: v8::FunctionCallbackArguments,
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_rv: v8::ReturnValue| {
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let arg = args.get(0);
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if is_instance_of_error(scope, arg) {
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let e: crate::error::NativeJsError =
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serde_v8::from_v8(scope, arg).unwrap();
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let name = e.name.unwrap_or_else(|| "Error".to_string());
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let message = v8::Exception::create_message(scope, arg);
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if message.get_stack_trace(scope).unwrap().get_frame_count() == 0 {
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let arg: v8::Local<v8::Object> = arg.try_into().unwrap();
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let message_key = v8::String::new(scope, "message").unwrap();
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let message = arg.get(scope, message_key.into()).unwrap();
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let exception = match name.as_str() {
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"RangeError" => {
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v8::Exception::range_error(scope, message.try_into().unwrap())
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}
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"TypeError" => {
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v8::Exception::type_error(scope, message.try_into().unwrap())
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}
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"SyntaxError" => {
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v8::Exception::syntax_error(scope, message.try_into().unwrap())
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}
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"ReferenceError" => {
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v8::Exception::reference_error(scope, message.try_into().unwrap())
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}
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_ => v8::Exception::error(scope, message.try_into().unwrap()),
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};
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let code_key = v8::String::new(scope, "code").unwrap();
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let code_value =
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v8::String::new(scope, "ERR_MODULE_NOT_FOUND").unwrap();
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let exception_obj = exception.to_object(scope).unwrap();
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exception_obj.set(scope, code_key.into(), code_value.into());
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scope.throw_exception(exception);
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return;
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}
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}
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scope.throw_exception(arg);
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};
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let map_err = v8::FunctionTemplate::new(scope, map_err);
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let map_err = map_err.get_function(scope).unwrap();
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let promise = promise.catch(scope, map_err).unwrap();
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&*promise as *const _ as *mut _
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}
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pub extern "C" fn host_initialize_import_meta_object_callback(
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context: v8::Local<v8::Context>,
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module: v8::Local<v8::Module>,
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meta: v8::Local<v8::Object>,
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) {
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// SAFETY: `CallbackScope` can be safely constructed from `Local<Context>`
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let scope = &mut unsafe { v8::CallbackScope::new(context) };
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let module_map_rc = JsRuntime::module_map(scope);
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let module_map = module_map_rc.borrow();
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let module_global = v8::Global::new(scope, module);
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let info = module_map
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.get_info(&module_global)
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.expect("Module not found");
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let url_key = v8::String::new(scope, "url").unwrap();
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let url_val = v8::String::new(scope, &info.name).unwrap();
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meta.create_data_property(scope, url_key.into(), url_val.into());
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let main_key = v8::String::new(scope, "main").unwrap();
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let main_val = v8::Boolean::new(scope, info.main);
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meta.create_data_property(scope, main_key.into(), main_val.into());
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}
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pub extern "C" fn promise_reject_callback(message: v8::PromiseRejectMessage) {
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use v8::PromiseRejectEvent::*;
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// SAFETY: `CallbackScope` can be safely constructed from `&PromiseRejectMessage`
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let scope = &mut unsafe { v8::CallbackScope::new(&message) };
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let state_rc = JsRuntime::state(scope);
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let mut state = state_rc.borrow_mut();
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// Node compat: perform synchronous process.emit("unhandledRejection").
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//
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// Note the callback follows the (type, promise, reason) signature of Node's
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// internal promiseRejectHandler from lib/internal/process/promises.js, not
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// the (promise, reason) signature of the "unhandledRejection" event listener.
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//
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// Short-circuits Deno's regular unhandled rejection logic because that's
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// a) asynchronous, and b) always terminates.
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if let Some(js_promise_reject_cb) = state.js_promise_reject_cb.clone() {
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let js_uncaught_exception_cb = state.js_uncaught_exception_cb.clone();
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drop(state); // Drop borrow, callbacks can call back into runtime.
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let tc_scope = &mut v8::TryCatch::new(scope);
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let undefined: v8::Local<v8::Value> = v8::undefined(tc_scope).into();
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let type_ = v8::Integer::new(tc_scope, message.get_event() as i32);
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let promise = message.get_promise();
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let reason = match message.get_event() {
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PromiseRejectWithNoHandler
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| PromiseRejectAfterResolved
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| PromiseResolveAfterResolved => message.get_value().unwrap_or(undefined),
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PromiseHandlerAddedAfterReject => undefined,
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};
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let args = &[type_.into(), promise.into(), reason];
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js_promise_reject_cb
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.open(tc_scope)
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.call(tc_scope, undefined, args);
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if let Some(exception) = tc_scope.exception() {
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if let Some(js_uncaught_exception_cb) = js_uncaught_exception_cb {
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tc_scope.reset(); // Cancel pending exception.
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js_uncaught_exception_cb.open(tc_scope).call(
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tc_scope,
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undefined,
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&[exception],
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);
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}
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}
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if tc_scope.has_caught() {
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// If we get here, an exception was thrown by the unhandledRejection
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// handler and there is ether no uncaughtException handler or the
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// handler threw an exception of its own.
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//
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// TODO(bnoordhuis) Node terminates the process or worker thread
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// but we don't really have that option. The exception won't bubble
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// up either because V8 cancels it when this function returns.
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let exception = tc_scope
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.stack_trace()
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.or_else(|| tc_scope.exception())
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.map(|value| value.to_rust_string_lossy(tc_scope))
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.unwrap_or_else(|| "no exception".into());
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eprintln!("Unhandled exception: {}", exception);
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}
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} else {
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let promise = message.get_promise();
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let promise_global = v8::Global::new(scope, promise);
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match message.get_event() {
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PromiseRejectWithNoHandler => {
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let error = message.get_value().unwrap();
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let error_global = v8::Global::new(scope, error);
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state
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.pending_promise_exceptions
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.insert(promise_global, error_global);
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}
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PromiseHandlerAddedAfterReject => {
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state.pending_promise_exceptions.remove(&promise_global);
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}
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PromiseRejectAfterResolved => {}
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PromiseResolveAfterResolved => {
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// Should not warn. See #1272
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}
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}
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}
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}
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/// This binding should be used if there's a custom console implementation
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/// available. Using it will make sure that proper stack frames are displayed
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/// in the inspector console.
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///
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/// Each method on console object should be bound to this function, eg:
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/// ```ignore
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/// function wrapConsole(consoleFromDeno, consoleFromV8) {
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/// const callConsole = core.callConsole;
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///
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/// for (const key of Object.keys(consoleFromV8)) {
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/// if (consoleFromDeno.hasOwnProperty(key)) {
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/// consoleFromDeno[key] = callConsole.bind(
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/// consoleFromDeno,
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/// consoleFromV8[key],
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/// consoleFromDeno[key],
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/// );
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/// }
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/// }
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/// }
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/// ```
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///
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/// Inspired by:
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/// https://github.com/nodejs/node/blob/1317252dfe8824fd9cfee125d2aaa94004db2f3b/src/inspector_js_api.cc#L194-L222
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fn call_console(
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scope: &mut v8::HandleScope,
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args: v8::FunctionCallbackArguments,
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_rv: v8::ReturnValue,
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) {
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if args.length() < 2
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|| !args.get(0).is_function()
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|| !args.get(1).is_function()
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{
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return throw_type_error(scope, "Invalid arguments");
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}
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let mut call_args = vec![];
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for i in 2..args.length() {
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call_args.push(args.get(i));
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}
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let receiver = args.this();
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let inspector_console_method =
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v8::Local::<v8::Function>::try_from(args.get(0)).unwrap();
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let deno_console_method =
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v8::Local::<v8::Function>::try_from(args.get(1)).unwrap();
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inspector_console_method.call(scope, receiver.into(), &call_args);
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deno_console_method.call(scope, receiver.into(), &call_args);
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}
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/// Called by V8 during `JsRuntime::instantiate_module`.
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///
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/// This function borrows `ModuleMap` from the isolate slot,
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/// so it is crucial to ensure there are no existing borrows
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/// of `ModuleMap` when `JsRuntime::instantiate_module` is called.
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pub fn module_resolve_callback<'s>(
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context: v8::Local<'s, v8::Context>,
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specifier: v8::Local<'s, v8::String>,
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import_assertions: v8::Local<'s, v8::FixedArray>,
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referrer: v8::Local<'s, v8::Module>,
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) -> Option<v8::Local<'s, v8::Module>> {
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// SAFETY: `CallbackScope` can be safely constructed from `Local<Context>`
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let scope = &mut unsafe { v8::CallbackScope::new(context) };
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let module_map_rc = JsRuntime::module_map(scope);
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let module_map = module_map_rc.borrow();
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let referrer_global = v8::Global::new(scope, referrer);
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let referrer_info = module_map
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.get_info(&referrer_global)
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.expect("ModuleInfo not found");
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let referrer_name = referrer_info.name.to_string();
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let specifier_str = specifier.to_rust_string_lossy(scope);
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let assertions = parse_import_assertions(
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scope,
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import_assertions,
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ImportAssertionsKind::StaticImport,
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);
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let maybe_module = module_map.resolve_callback(
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scope,
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&specifier_str,
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&referrer_name,
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assertions,
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);
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if let Some(module) = maybe_module {
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return Some(module);
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}
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let msg = format!(
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r#"Cannot resolve module "{}" from "{}""#,
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specifier_str, referrer_name
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);
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throw_type_error(scope, msg);
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None
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}
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pub fn throw_type_error(scope: &mut v8::HandleScope, message: impl AsRef<str>) {
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let message = v8::String::new(scope, message.as_ref()).unwrap();
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let exception = v8::Exception::type_error(scope, message);
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scope.throw_exception(exception);
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}
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