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bindings.rs
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bindings.rs
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
use crate::es_isolate::EsIsolate;
use crate::isolate::Isolate;
use crate::isolate::ZeroCopyBuf;
use rusty_v8 as v8;
use v8::MapFnTo;
use std::convert::TryFrom;
use std::option::Option;
lazy_static! {
pub static ref EXTERNAL_REFERENCES: v8::ExternalReferences =
v8::ExternalReferences::new(&[
v8::ExternalReference {
function: print.map_fn_to()
},
v8::ExternalReference {
function: recv.map_fn_to()
},
v8::ExternalReference {
function: send.map_fn_to()
},
v8::ExternalReference {
function: eval_context.map_fn_to()
},
v8::ExternalReference {
function: error_to_json.map_fn_to()
},
v8::ExternalReference {
getter: shared_getter.map_fn_to()
},
v8::ExternalReference {
message: message_callback
},
v8::ExternalReference {
function: queue_microtask.map_fn_to()
},
]);
}
pub fn script_origin<'a>(
s: &mut impl v8::ToLocal<'a>,
resource_name: v8::Local<'a, v8::String>,
) -> v8::ScriptOrigin<'a> {
let resource_line_offset = v8::Integer::new(s, 0);
let resource_column_offset = v8::Integer::new(s, 0);
let resource_is_shared_cross_origin = v8::Boolean::new(s, false);
let script_id = v8::Integer::new(s, 123);
let source_map_url = v8::String::new(s, "source_map_url").unwrap();
let resource_is_opaque = v8::Boolean::new(s, true);
let is_wasm = v8::Boolean::new(s, false);
let is_module = v8::Boolean::new(s, false);
v8::ScriptOrigin::new(
resource_name.into(),
resource_line_offset,
resource_column_offset,
resource_is_shared_cross_origin,
script_id,
source_map_url.into(),
resource_is_opaque,
is_wasm,
is_module,
)
}
pub fn module_origin<'a>(
s: &mut impl v8::ToLocal<'a>,
resource_name: v8::Local<'a, v8::String>,
) -> v8::ScriptOrigin<'a> {
let resource_line_offset = v8::Integer::new(s, 0);
let resource_column_offset = v8::Integer::new(s, 0);
let resource_is_shared_cross_origin = v8::Boolean::new(s, false);
let script_id = v8::Integer::new(s, 123);
let source_map_url = v8::String::new(s, "source_map_url").unwrap();
let resource_is_opaque = v8::Boolean::new(s, true);
let is_wasm = v8::Boolean::new(s, false);
let is_module = v8::Boolean::new(s, true);
v8::ScriptOrigin::new(
resource_name.into(),
resource_line_offset,
resource_column_offset,
resource_is_shared_cross_origin,
script_id,
source_map_url.into(),
resource_is_opaque,
is_wasm,
is_module,
)
}
pub fn initialize_context<'s>(
scope: &mut impl v8::ToLocal<'s>,
) -> v8::Local<'s, v8::Context> {
let mut hs = v8::EscapableHandleScope::new(scope);
let scope = hs.enter();
let context = v8::Context::new(scope);
let global = context.global(scope);
let mut cs = v8::ContextScope::new(scope, context);
let scope = cs.enter();
let deno_val = v8::Object::new(scope);
global.set(
context,
v8::String::new(scope, "Deno").unwrap().into(),
deno_val.into(),
);
let mut core_val = v8::Object::new(scope);
deno_val.set(
context,
v8::String::new(scope, "core").unwrap().into(),
core_val.into(),
);
let mut print_tmpl = v8::FunctionTemplate::new(scope, print);
let print_val = print_tmpl.get_function(scope, context).unwrap();
core_val.set(
context,
v8::String::new(scope, "print").unwrap().into(),
print_val.into(),
);
let mut recv_tmpl = v8::FunctionTemplate::new(scope, recv);
let recv_val = recv_tmpl.get_function(scope, context).unwrap();
core_val.set(
context,
v8::String::new(scope, "recv").unwrap().into(),
recv_val.into(),
);
let mut send_tmpl = v8::FunctionTemplate::new(scope, send);
let send_val = send_tmpl.get_function(scope, context).unwrap();
core_val.set(
context,
v8::String::new(scope, "send").unwrap().into(),
send_val.into(),
);
let mut eval_context_tmpl = v8::FunctionTemplate::new(scope, eval_context);
let eval_context_val =
eval_context_tmpl.get_function(scope, context).unwrap();
core_val.set(
context,
v8::String::new(scope, "evalContext").unwrap().into(),
eval_context_val.into(),
);
let mut error_to_json_tmpl = v8::FunctionTemplate::new(scope, error_to_json);
let error_to_json_val =
error_to_json_tmpl.get_function(scope, context).unwrap();
core_val.set(
context,
v8::String::new(scope, "errorToJSON").unwrap().into(),
error_to_json_val.into(),
);
core_val.set_accessor(
context,
v8::String::new(scope, "shared").unwrap().into(),
shared_getter,
);
// Direct bindings on `window`.
let mut queue_microtask_tmpl =
v8::FunctionTemplate::new(scope, queue_microtask);
let queue_microtask_val =
queue_microtask_tmpl.get_function(scope, context).unwrap();
global.set(
context,
v8::String::new(scope, "queueMicrotask").unwrap().into(),
queue_microtask_val.into(),
);
scope.escape(context)
}
pub fn boxed_slice_to_uint8array<'sc>(
scope: &mut impl v8::ToLocal<'sc>,
buf: Box<[u8]>,
) -> v8::Local<'sc, v8::Uint8Array> {
assert!(!buf.is_empty());
let buf_len = buf.len();
let backing_store = v8::ArrayBuffer::new_backing_store_from_boxed_slice(buf);
let mut backing_store_shared = backing_store.make_shared();
let ab =
v8::ArrayBuffer::with_backing_store(scope, &mut backing_store_shared);
v8::Uint8Array::new(ab, 0, buf_len).expect("Failed to create UintArray8")
}
pub extern "C" fn host_import_module_dynamically_callback(
context: v8::Local<v8::Context>,
referrer: v8::Local<v8::ScriptOrModule>,
specifier: v8::Local<v8::String>,
) -> *mut v8::Promise {
let mut cbs = v8::CallbackScope::new_escapable(context);
let mut hs = v8::EscapableHandleScope::new(cbs.enter());
let scope = hs.enter();
let isolate = scope.isolate();
let deno_isolate: &mut EsIsolate =
unsafe { &mut *(isolate.get_data(1) as *mut EsIsolate) };
// NOTE(bartlomieju): will crash for non-UTF-8 specifier
let specifier_str = specifier
.to_string(scope)
.unwrap()
.to_rust_string_lossy(scope);
let referrer_name = referrer.get_resource_name();
let referrer_name_str = referrer_name
.to_string(scope)
.unwrap()
.to_rust_string_lossy(scope);
// TODO(ry) I'm not sure what HostDefinedOptions is for or if we're ever going
// to use it. For now we check that it is not used. This check may need to be
// changed in the future.
let host_defined_options = referrer.get_host_defined_options();
assert_eq!(host_defined_options.length(), 0);
let mut resolver = v8::PromiseResolver::new(scope, context).unwrap();
let promise = resolver.get_promise(scope);
let mut resolver_handle = v8::Global::new();
resolver_handle.set(scope, resolver);
let import_id = deno_isolate.next_dyn_import_id;
deno_isolate.next_dyn_import_id += 1;
deno_isolate
.dyn_import_map
.insert(import_id, resolver_handle);
deno_isolate.dyn_import_cb(&specifier_str, &referrer_name_str, import_id);
&mut *scope.escape(promise)
}
pub extern "C" fn host_initialize_import_meta_object_callback(
context: v8::Local<v8::Context>,
module: v8::Local<v8::Module>,
meta: v8::Local<v8::Object>,
) {
let mut cbs = v8::CallbackScope::new(context);
let mut hs = v8::HandleScope::new(cbs.enter());
let scope = hs.enter();
let isolate = scope.isolate();
let deno_isolate: &mut EsIsolate =
unsafe { &mut *(isolate.get_data(1) as *mut EsIsolate) };
let id = module.get_identity_hash();
assert_ne!(id, 0);
let info = deno_isolate.modules.get_info(id).expect("Module not found");
meta.create_data_property(
context,
v8::String::new(scope, "url").unwrap().into(),
v8::String::new(scope, &info.name).unwrap().into(),
);
meta.create_data_property(
context,
v8::String::new(scope, "main").unwrap().into(),
v8::Boolean::new(scope, info.main).into(),
);
}
pub extern "C" fn message_callback(
message: v8::Local<v8::Message>,
_exception: v8::Local<v8::Value>,
) {
let mut cbs = v8::CallbackScope::new(message);
let mut hs = v8::HandleScope::new(cbs.enter());
let scope = hs.enter();
let deno_isolate: &mut Isolate =
unsafe { &mut *(scope.isolate().get_data(0) as *mut Isolate) };
// TerminateExecution was called
if scope.isolate().is_execution_terminating() {
let undefined = v8::undefined(scope).into();
deno_isolate.handle_exception(scope, undefined);
return;
}
let json_str = deno_isolate.encode_message_as_json(scope, message);
deno_isolate.last_exception = Some(json_str);
}
pub extern "C" fn promise_reject_callback(message: v8::PromiseRejectMessage) {
let mut cbs = v8::CallbackScope::new(&message);
let mut hs = v8::HandleScope::new(cbs.enter());
let scope = hs.enter();
let deno_isolate: &mut Isolate =
unsafe { &mut *(scope.isolate().get_data(0) as *mut Isolate) };
let context = deno_isolate.global_context.get(scope).unwrap();
let mut cs = v8::ContextScope::new(scope, context);
let scope = cs.enter();
let promise = message.get_promise();
let promise_id = promise.get_identity_hash();
match message.get_event() {
v8::PromiseRejectEvent::PromiseRejectWithNoHandler => {
let error = message.get_value();
let mut error_global = v8::Global::<v8::Value>::new();
error_global.set(scope, error);
deno_isolate
.pending_promise_exceptions
.insert(promise_id, error_global);
}
v8::PromiseRejectEvent::PromiseHandlerAddedAfterReject => {
if let Some(mut handle) =
deno_isolate.pending_promise_exceptions.remove(&promise_id)
{
handle.reset(scope);
}
}
v8::PromiseRejectEvent::PromiseRejectAfterResolved => {}
v8::PromiseRejectEvent::PromiseResolveAfterResolved => {
// Should not warn. See #1272
}
};
}
fn print(
scope: v8::FunctionCallbackScope,
args: v8::FunctionCallbackArguments,
_rv: v8::ReturnValue,
) {
let arg_len = args.length();
assert!(arg_len >= 0 && arg_len <= 2);
let obj = args.get(0);
let is_err_arg = args.get(1);
let mut hs = v8::HandleScope::new(scope);
let scope = hs.enter();
let mut is_err = false;
if arg_len == 2 {
let int_val = is_err_arg
.integer_value(scope)
.expect("Unable to convert to integer");
is_err = int_val != 0;
};
let mut try_catch = v8::TryCatch::new(scope);
let _tc = try_catch.enter();
let str_ = match obj.to_string(scope) {
Some(s) => s,
None => v8::String::new(scope, "").unwrap(),
};
if is_err {
eprint!("{}", str_.to_rust_string_lossy(scope));
} else {
print!("{}", str_.to_rust_string_lossy(scope));
}
}
fn recv(
scope: v8::FunctionCallbackScope,
args: v8::FunctionCallbackArguments,
_rv: v8::ReturnValue,
) {
let deno_isolate: &mut Isolate =
unsafe { &mut *(scope.isolate().get_data(0) as *mut Isolate) };
if !deno_isolate.js_recv_cb.is_empty() {
let msg = v8::String::new(scope, "Deno.core.recv already called.").unwrap();
scope.isolate().throw_exception(msg.into());
return;
}
let recv_fn = v8::Local::<v8::Function>::try_from(args.get(0)).unwrap();
deno_isolate.js_recv_cb.set(scope, recv_fn);
}
fn send(
scope: v8::FunctionCallbackScope,
args: v8::FunctionCallbackArguments,
mut rv: v8::ReturnValue,
) {
let deno_isolate: &mut Isolate =
unsafe { &mut *(scope.isolate().get_data(0) as *mut Isolate) };
assert!(!deno_isolate.global_context.is_empty());
let op_id = v8::Local::<v8::Uint32>::try_from(args.get(0))
.unwrap()
.value() as u32;
let control = match v8::Local::<v8::ArrayBufferView>::try_from(args.get(1)) {
Ok(view) => {
let byte_offset = view.byte_offset();
let byte_length = view.byte_length();
let backing_store = view.buffer().unwrap().get_backing_store();
let buf = unsafe { &**backing_store.get() };
&buf[byte_offset..byte_offset + byte_length]
}
Err(..) => &[],
};
let zero_copy: Option<ZeroCopyBuf> =
v8::Local::<v8::ArrayBufferView>::try_from(args.get(2))
.map(ZeroCopyBuf::new)
.ok();
// If response is empty then it's either async op or exception was thrown
let maybe_response =
deno_isolate.dispatch_op(scope, op_id, control, zero_copy);
if let Some(response) = maybe_response {
// Synchronous response.
// Note op_id is not passed back in the case of synchronous response.
let (_op_id, buf) = response;
if !buf.is_empty() {
let ui8 = boxed_slice_to_uint8array(scope, buf);
rv.set(ui8.into())
}
}
}
fn eval_context(
scope: v8::FunctionCallbackScope,
args: v8::FunctionCallbackArguments,
mut rv: v8::ReturnValue,
) {
let deno_isolate: &mut Isolate =
unsafe { &mut *(scope.isolate().get_data(0) as *mut Isolate) };
assert!(!deno_isolate.global_context.is_empty());
let context = deno_isolate.global_context.get(scope).unwrap();
let source = match v8::Local::<v8::String>::try_from(args.get(0)) {
Ok(s) => s,
Err(_) => {
let msg = v8::String::new(scope, "Invalid argument").unwrap();
let exception = v8::Exception::type_error(scope, msg);
scope.isolate().throw_exception(exception);
return;
}
};
let output = v8::Array::new(scope, 2);
/*
output[0] = result
output[1] = ErrorInfo | null
ErrorInfo = {
thrown: Error | any,
isNativeError: boolean,
isCompileError: boolean,
}
*/
let mut try_catch = v8::TryCatch::new(scope);
let tc = try_catch.enter();
let name = v8::String::new(scope, "<unknown>").unwrap();
let origin = script_origin(scope, name);
let maybe_script = v8::Script::compile(scope, context, source, Some(&origin));
if maybe_script.is_none() {
assert!(tc.has_caught());
let exception = tc.exception().unwrap();
output.set(
context,
v8::Integer::new(scope, 0).into(),
v8::null(scope).into(),
);
let errinfo_obj = v8::Object::new(scope);
errinfo_obj.set(
context,
v8::String::new(scope, "isCompileError").unwrap().into(),
v8::Boolean::new(scope, true).into(),
);
errinfo_obj.set(
context,
v8::String::new(scope, "isNativeError").unwrap().into(),
v8::Boolean::new(scope, exception.is_native_error()).into(),
);
errinfo_obj.set(
context,
v8::String::new(scope, "thrown").unwrap().into(),
exception,
);
output.set(
context,
v8::Integer::new(scope, 1).into(),
errinfo_obj.into(),
);
rv.set(output.into());
return;
}
let result = maybe_script.unwrap().run(scope, context);
if result.is_none() {
assert!(tc.has_caught());
let exception = tc.exception().unwrap();
output.set(
context,
v8::Integer::new(scope, 0).into(),
v8::null(scope).into(),
);
let errinfo_obj = v8::Object::new(scope);
errinfo_obj.set(
context,
v8::String::new(scope, "isCompileError").unwrap().into(),
v8::Boolean::new(scope, false).into(),
);
let is_native_error = if exception.is_native_error() {
v8::Boolean::new(scope, true)
} else {
v8::Boolean::new(scope, false)
};
errinfo_obj.set(
context,
v8::String::new(scope, "isNativeError").unwrap().into(),
is_native_error.into(),
);
errinfo_obj.set(
context,
v8::String::new(scope, "thrown").unwrap().into(),
exception,
);
output.set(
context,
v8::Integer::new(scope, 1).into(),
errinfo_obj.into(),
);
rv.set(output.into());
return;
}
output.set(context, v8::Integer::new(scope, 0).into(), result.unwrap());
output.set(
context,
v8::Integer::new(scope, 1).into(),
v8::null(scope).into(),
);
rv.set(output.into());
}
fn error_to_json(
scope: v8::FunctionCallbackScope,
args: v8::FunctionCallbackArguments,
mut rv: v8::ReturnValue,
) {
let deno_isolate: &mut Isolate =
unsafe { &mut *(scope.isolate().get_data(0) as *mut Isolate) };
let context = deno_isolate.global_context.get(scope).unwrap();
let message = v8::Exception::create_message(scope, args.get(0));
let json_obj = encode_message_as_object(scope, message);
let json_string = v8::json::stringify(context, json_obj.into()).unwrap();
rv.set(json_string.into());
}
fn queue_microtask(
scope: v8::FunctionCallbackScope,
args: v8::FunctionCallbackArguments,
_rv: v8::ReturnValue,
) {
match v8::Local::<v8::Function>::try_from(args.get(0)) {
Ok(f) => scope.isolate().enqueue_microtask(f),
Err(_) => {
let msg = v8::String::new(scope, "Invalid argument").unwrap();
let exception = v8::Exception::type_error(scope, msg);
scope.isolate().throw_exception(exception);
}
};
}
fn shared_getter(
scope: v8::PropertyCallbackScope,
_name: v8::Local<v8::Name>,
_args: v8::PropertyCallbackArguments,
mut rv: v8::ReturnValue,
) {
let deno_isolate: &mut Isolate =
unsafe { &mut *(scope.isolate().get_data(0) as *mut Isolate) };
// Lazily initialize the persistent external ArrayBuffer.
if deno_isolate.shared_ab.is_empty() {
let ab = v8::SharedArrayBuffer::with_backing_store(
scope,
deno_isolate.shared.get_backing_store(),
);
deno_isolate.shared_ab.set(scope, ab);
}
let shared_ab = deno_isolate.shared_ab.get(scope).unwrap();
rv.set(shared_ab.into());
}
pub fn module_resolve_callback<'s>(
context: v8::Local<'s, v8::Context>,
specifier: v8::Local<'s, v8::String>,
referrer: v8::Local<'s, v8::Module>,
) -> Option<v8::Local<'s, v8::Module>> {
let mut scope = v8::CallbackScope::new_escapable(context);
let mut scope = v8::EscapableHandleScope::new(scope.enter());
let scope = scope.enter();
let deno_isolate: &mut EsIsolate =
unsafe { &mut *(scope.isolate().get_data(1) as *mut EsIsolate) };
let referrer_id = referrer.get_identity_hash();
let referrer_name = deno_isolate
.modules
.get_info(referrer_id)
.expect("ModuleInfo not found")
.name
.to_string();
let len_ = referrer.get_module_requests_length();
let specifier_str = specifier.to_rust_string_lossy(scope);
for i in 0..len_ {
let req = referrer.get_module_request(i);
let req_str = req.to_rust_string_lossy(scope);
if req_str == specifier_str {
let id = deno_isolate.module_resolve_cb(&req_str, referrer_id);
let maybe_info = deno_isolate.modules.get_info(id);
if maybe_info.is_none() {
let msg = format!(
"Cannot resolve module \"{}\" from \"{}\"",
req_str, referrer_name
);
let msg = v8::String::new(scope, &msg).unwrap();
scope.isolate().throw_exception(msg.into());
break;
}
return maybe_info
.and_then(|i| i.handle.get(scope))
.map(|m| scope.escape(m));
}
}
None
}
pub fn encode_message_as_object<'a>(
s: &mut impl v8::ToLocal<'a>,
message: v8::Local<v8::Message>,
) -> v8::Local<'a, v8::Object> {
let context = s.isolate().get_current_context();
let json_obj = v8::Object::new(s);
let exception_str = message.get(s);
json_obj.set(
context,
v8::String::new(s, "message").unwrap().into(),
exception_str.into(),
);
let script_resource_name = message
.get_script_resource_name(s)
.expect("Missing ScriptResourceName");
json_obj.set(
context,
v8::String::new(s, "scriptResourceName").unwrap().into(),
script_resource_name,
);
let source_line = message
.get_source_line(s, context)
.expect("Missing SourceLine");
json_obj.set(
context,
v8::String::new(s, "sourceLine").unwrap().into(),
source_line.into(),
);
let line_number = message
.get_line_number(context)
.expect("Missing LineNumber");
json_obj.set(
context,
v8::String::new(s, "lineNumber").unwrap().into(),
v8::Integer::new(s, line_number as i32).into(),
);
json_obj.set(
context,
v8::String::new(s, "startPosition").unwrap().into(),
v8::Integer::new(s, message.get_start_position() as i32).into(),
);
json_obj.set(
context,
v8::String::new(s, "endPosition").unwrap().into(),
v8::Integer::new(s, message.get_end_position() as i32).into(),
);
json_obj.set(
context,
v8::String::new(s, "errorLevel").unwrap().into(),
v8::Integer::new(s, message.error_level() as i32).into(),
);
json_obj.set(
context,
v8::String::new(s, "startColumn").unwrap().into(),
v8::Integer::new(s, message.get_start_column() as i32).into(),
);
json_obj.set(
context,
v8::String::new(s, "endColumn").unwrap().into(),
v8::Integer::new(s, message.get_end_column() as i32).into(),
);
let is_shared_cross_origin =
v8::Boolean::new(s, message.is_shared_cross_origin());
json_obj.set(
context,
v8::String::new(s, "isSharedCrossOrigin").unwrap().into(),
is_shared_cross_origin.into(),
);
let is_opaque = v8::Boolean::new(s, message.is_opaque());
json_obj.set(
context,
v8::String::new(s, "isOpaque").unwrap().into(),
is_opaque.into(),
);
let frames = if let Some(stack_trace) = message.get_stack_trace(s) {
let count = stack_trace.get_frame_count() as i32;
let frames = v8::Array::new(s, count);
for i in 0..count {
let frame = stack_trace
.get_frame(s, i as usize)
.expect("No frame found");
let frame_obj = v8::Object::new(s);
frames.set(context, v8::Integer::new(s, i).into(), frame_obj.into());
frame_obj.set(
context,
v8::String::new(s, "line").unwrap().into(),
v8::Integer::new(s, frame.get_line_number() as i32).into(),
);
frame_obj.set(
context,
v8::String::new(s, "column").unwrap().into(),
v8::Integer::new(s, frame.get_column() as i32).into(),
);
if let Some(function_name) = frame.get_function_name(s) {
frame_obj.set(
context,
v8::String::new(s, "functionName").unwrap().into(),
function_name.into(),
);
}
let script_name = match frame.get_script_name_or_source_url(s) {
Some(name) => name,
None => v8::String::new(s, "<unknown>").unwrap(),
};
frame_obj.set(
context,
v8::String::new(s, "scriptName").unwrap().into(),
script_name.into(),
);
frame_obj.set(
context,
v8::String::new(s, "isEval").unwrap().into(),
v8::Boolean::new(s, frame.is_eval()).into(),
);
frame_obj.set(
context,
v8::String::new(s, "isConstructor").unwrap().into(),
v8::Boolean::new(s, frame.is_constructor()).into(),
);
frame_obj.set(
context,
v8::String::new(s, "isWasm").unwrap().into(),
v8::Boolean::new(s, frame.is_wasm()).into(),
);
}
frames
} else {
// No stack trace. We only have one stack frame of info..
let frames = v8::Array::new(s, 1);
let frame_obj = v8::Object::new(s);
frames.set(context, v8::Integer::new(s, 0).into(), frame_obj.into());
frame_obj.set(
context,
v8::String::new(s, "scriptResourceName").unwrap().into(),
script_resource_name,
);
frame_obj.set(
context,
v8::String::new(s, "line").unwrap().into(),
v8::Integer::new(s, line_number as i32).into(),
);
frame_obj.set(
context,
v8::String::new(s, "column").unwrap().into(),
v8::Integer::new(s, message.get_start_column() as i32).into(),
);
frames
};
json_obj.set(
context,
v8::String::new(s, "frames").unwrap().into(),
frames.into(),
);
json_obj
}