mirror of
https://github.com/denoland/deno.git
synced 2024-11-01 09:24:20 -04:00
a2db70a8d0
- [x] `dlfcn.rs` - `dlopen()`-related code. - [x] `turbocall.rs` - Call trampoline JIT compiler. - [x] `repr.rs` - Pointer representation. Home of the UnsafePointerView ops. - [x] `symbol.rs` - Function symbol related code. - [x] `callback.rs` - Home of `Deno.UnsafeCallback` ops. - [x] `ir.rs` - Intermediate representation for values. Home of the `NativeValue` type. - [x] `call.rs` - Generic call ops. Home to everything related to calling FFI symbols. - [x] `static.rs` - static symbol support I find easier to work with this setup, I eventually want to expand TurboCall to unroll type conversion loop in generic calls, generate code for individual symbols (lazy function pointers), etc.
527 lines
17 KiB
Rust
527 lines
17 KiB
Rust
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
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use crate::symbol::NativeType;
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use crate::MAX_SAFE_INTEGER;
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use crate::MIN_SAFE_INTEGER;
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use deno_core::error::type_error;
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use deno_core::error::AnyError;
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use deno_core::serde_json::Value;
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use deno_core::serde_v8;
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use deno_core::v8;
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use libffi::middle::Arg;
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use std::ffi::c_void;
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use std::ptr;
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/// Intermediate format for easy translation from NativeType + V8 value
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/// to libffi argument types.
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#[repr(C)]
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pub union NativeValue {
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pub void_value: (),
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pub bool_value: bool,
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pub u8_value: u8,
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pub i8_value: i8,
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pub u16_value: u16,
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pub i16_value: i16,
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pub u32_value: u32,
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pub i32_value: i32,
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pub u64_value: u64,
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pub i64_value: i64,
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pub usize_value: usize,
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pub isize_value: isize,
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pub f32_value: f32,
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pub f64_value: f64,
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pub pointer: *mut c_void,
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}
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impl NativeValue {
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pub unsafe fn as_arg(&self, native_type: NativeType) -> Arg {
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match native_type {
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NativeType::Void => unreachable!(),
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NativeType::Bool => Arg::new(&self.bool_value),
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NativeType::U8 => Arg::new(&self.u8_value),
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NativeType::I8 => Arg::new(&self.i8_value),
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NativeType::U16 => Arg::new(&self.u16_value),
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NativeType::I16 => Arg::new(&self.i16_value),
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NativeType::U32 => Arg::new(&self.u32_value),
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NativeType::I32 => Arg::new(&self.i32_value),
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NativeType::U64 => Arg::new(&self.u64_value),
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NativeType::I64 => Arg::new(&self.i64_value),
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NativeType::USize => Arg::new(&self.usize_value),
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NativeType::ISize => Arg::new(&self.isize_value),
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NativeType::F32 => Arg::new(&self.f32_value),
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NativeType::F64 => Arg::new(&self.f64_value),
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NativeType::Pointer | NativeType::Buffer | NativeType::Function => {
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Arg::new(&self.pointer)
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}
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}
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}
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// SAFETY: native_type must correspond to the type of value represented by the union field
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pub unsafe fn to_value(&self, native_type: NativeType) -> Value {
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match native_type {
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NativeType::Void => Value::Null,
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NativeType::Bool => Value::from(self.bool_value),
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NativeType::U8 => Value::from(self.u8_value),
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NativeType::I8 => Value::from(self.i8_value),
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NativeType::U16 => Value::from(self.u16_value),
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NativeType::I16 => Value::from(self.i16_value),
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NativeType::U32 => Value::from(self.u32_value),
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NativeType::I32 => Value::from(self.i32_value),
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NativeType::U64 => Value::from(self.u64_value),
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NativeType::I64 => Value::from(self.i64_value),
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NativeType::USize => Value::from(self.usize_value),
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NativeType::ISize => Value::from(self.isize_value),
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NativeType::F32 => Value::from(self.f32_value),
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NativeType::F64 => Value::from(self.f64_value),
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NativeType::Pointer | NativeType::Function | NativeType::Buffer => {
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Value::from(self.pointer as usize)
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}
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}
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}
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// SAFETY: native_type must correspond to the type of value represented by the union field
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#[inline]
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pub unsafe fn to_v8<'scope>(
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&self,
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scope: &mut v8::HandleScope<'scope>,
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native_type: NativeType,
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) -> serde_v8::Value<'scope> {
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match native_type {
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NativeType::Void => {
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let local_value: v8::Local<v8::Value> = v8::undefined(scope).into();
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local_value.into()
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}
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NativeType::Bool => {
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let local_value: v8::Local<v8::Value> =
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v8::Boolean::new(scope, self.bool_value).into();
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local_value.into()
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}
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NativeType::U8 => {
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let local_value: v8::Local<v8::Value> =
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v8::Integer::new_from_unsigned(scope, self.u8_value as u32).into();
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local_value.into()
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}
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NativeType::I8 => {
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let local_value: v8::Local<v8::Value> =
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v8::Integer::new(scope, self.i8_value as i32).into();
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local_value.into()
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}
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NativeType::U16 => {
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let local_value: v8::Local<v8::Value> =
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v8::Integer::new_from_unsigned(scope, self.u16_value as u32).into();
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local_value.into()
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}
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NativeType::I16 => {
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let local_value: v8::Local<v8::Value> =
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v8::Integer::new(scope, self.i16_value as i32).into();
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local_value.into()
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}
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NativeType::U32 => {
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let local_value: v8::Local<v8::Value> =
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v8::Integer::new_from_unsigned(scope, self.u32_value).into();
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local_value.into()
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}
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NativeType::I32 => {
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let local_value: v8::Local<v8::Value> =
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v8::Integer::new(scope, self.i32_value).into();
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local_value.into()
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}
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NativeType::U64 => {
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let value = self.u64_value;
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let local_value: v8::Local<v8::Value> =
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if value > MAX_SAFE_INTEGER as u64 {
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v8::BigInt::new_from_u64(scope, value).into()
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} else {
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v8::Number::new(scope, value as f64).into()
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};
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local_value.into()
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}
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NativeType::I64 => {
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let value = self.i64_value;
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let local_value: v8::Local<v8::Value> =
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if value > MAX_SAFE_INTEGER as i64 || value < MIN_SAFE_INTEGER as i64
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{
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v8::BigInt::new_from_i64(scope, self.i64_value).into()
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} else {
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v8::Number::new(scope, value as f64).into()
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};
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local_value.into()
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}
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NativeType::USize => {
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let value = self.usize_value;
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let local_value: v8::Local<v8::Value> =
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if value > MAX_SAFE_INTEGER as usize {
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v8::BigInt::new_from_u64(scope, value as u64).into()
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} else {
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v8::Number::new(scope, value as f64).into()
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};
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local_value.into()
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}
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NativeType::ISize => {
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let value = self.isize_value;
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let local_value: v8::Local<v8::Value> =
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if !(MIN_SAFE_INTEGER..=MAX_SAFE_INTEGER).contains(&value) {
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v8::BigInt::new_from_i64(scope, self.isize_value as i64).into()
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} else {
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v8::Number::new(scope, value as f64).into()
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};
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local_value.into()
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}
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NativeType::F32 => {
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let local_value: v8::Local<v8::Value> =
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v8::Number::new(scope, self.f32_value as f64).into();
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local_value.into()
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}
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NativeType::F64 => {
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let local_value: v8::Local<v8::Value> =
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v8::Number::new(scope, self.f64_value).into();
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local_value.into()
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}
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NativeType::Pointer | NativeType::Buffer | NativeType::Function => {
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let value = self.pointer as u64;
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let local_value: v8::Local<v8::Value> =
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if value > MAX_SAFE_INTEGER as u64 {
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v8::BigInt::new_from_u64(scope, value).into()
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} else {
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v8::Number::new(scope, value as f64).into()
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};
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local_value.into()
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}
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}
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}
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}
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// SAFETY: unsafe trait must have unsafe implementation
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unsafe impl Send for NativeValue {}
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#[inline]
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pub fn ffi_parse_bool_arg(
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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let bool_value = v8::Local::<v8::Boolean>::try_from(arg)
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.map_err(|_| type_error("Invalid FFI u8 type, expected boolean"))?
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.is_true();
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Ok(NativeValue { bool_value })
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}
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#[inline]
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pub fn ffi_parse_u8_arg(
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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let u8_value = v8::Local::<v8::Uint32>::try_from(arg)
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.map_err(|_| type_error("Invalid FFI u8 type, expected unsigned integer"))?
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.value() as u8;
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Ok(NativeValue { u8_value })
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}
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#[inline]
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pub fn ffi_parse_i8_arg(
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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let i8_value = v8::Local::<v8::Int32>::try_from(arg)
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.map_err(|_| type_error("Invalid FFI i8 type, expected integer"))?
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.value() as i8;
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Ok(NativeValue { i8_value })
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}
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#[inline]
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pub fn ffi_parse_u16_arg(
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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let u16_value = v8::Local::<v8::Uint32>::try_from(arg)
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.map_err(|_| type_error("Invalid FFI u16 type, expected unsigned integer"))?
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.value() as u16;
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Ok(NativeValue { u16_value })
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}
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#[inline]
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pub fn ffi_parse_i16_arg(
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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let i16_value = v8::Local::<v8::Int32>::try_from(arg)
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.map_err(|_| type_error("Invalid FFI i16 type, expected integer"))?
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.value() as i16;
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Ok(NativeValue { i16_value })
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}
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#[inline]
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pub fn ffi_parse_u32_arg(
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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let u32_value = v8::Local::<v8::Uint32>::try_from(arg)
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.map_err(|_| type_error("Invalid FFI u32 type, expected unsigned integer"))?
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.value() as u32;
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Ok(NativeValue { u32_value })
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}
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#[inline]
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pub fn ffi_parse_i32_arg(
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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let i32_value = v8::Local::<v8::Int32>::try_from(arg)
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.map_err(|_| type_error("Invalid FFI i32 type, expected integer"))?
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.value() as i32;
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Ok(NativeValue { i32_value })
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}
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#[inline]
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pub fn ffi_parse_u64_arg(
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scope: &mut v8::HandleScope,
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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// Order of checking:
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// 1. BigInt: Uncommon and not supported by Fast API, so optimise slow call for this case.
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// 2. Number: Common, supported by Fast API, so let that be the optimal case.
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let u64_value: u64 = if let Ok(value) = v8::Local::<v8::BigInt>::try_from(arg)
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{
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value.u64_value().0
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} else if let Ok(value) = v8::Local::<v8::Number>::try_from(arg) {
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value.integer_value(scope).unwrap() as u64
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} else {
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return Err(type_error(
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"Invalid FFI u64 type, expected unsigned integer",
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));
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};
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Ok(NativeValue { u64_value })
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}
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#[inline]
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pub fn ffi_parse_i64_arg(
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scope: &mut v8::HandleScope,
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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// Order of checking:
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// 1. BigInt: Uncommon and not supported by Fast API, so optimise slow call for this case.
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// 2. Number: Common, supported by Fast API, so let that be the optimal case.
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let i64_value: i64 = if let Ok(value) = v8::Local::<v8::BigInt>::try_from(arg)
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{
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value.i64_value().0
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} else if let Ok(value) = v8::Local::<v8::Number>::try_from(arg) {
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value.integer_value(scope).unwrap() as i64
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} else {
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return Err(type_error("Invalid FFI i64 type, expected integer"));
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};
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Ok(NativeValue { i64_value })
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}
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#[inline]
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pub fn ffi_parse_usize_arg(
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scope: &mut v8::HandleScope,
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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// Order of checking:
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// 1. BigInt: Uncommon and not supported by Fast API, so optimise slow call for this case.
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// 2. Number: Common, supported by Fast API, so let that be the optimal case.
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let usize_value: usize =
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if let Ok(value) = v8::Local::<v8::BigInt>::try_from(arg) {
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value.u64_value().0 as usize
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} else if let Ok(value) = v8::Local::<v8::Number>::try_from(arg) {
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value.integer_value(scope).unwrap() as usize
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} else {
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return Err(type_error("Invalid FFI usize type, expected integer"));
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};
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Ok(NativeValue { usize_value })
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}
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#[inline]
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pub fn ffi_parse_isize_arg(
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scope: &mut v8::HandleScope,
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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// Order of checking:
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// 1. BigInt: Uncommon and not supported by Fast API, so optimise slow call for this case.
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// 2. Number: Common, supported by Fast API, so let that be the optimal case.
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let isize_value: isize =
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if let Ok(value) = v8::Local::<v8::BigInt>::try_from(arg) {
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value.i64_value().0 as isize
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} else if let Ok(value) = v8::Local::<v8::Number>::try_from(arg) {
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value.integer_value(scope).unwrap() as isize
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} else {
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return Err(type_error("Invalid FFI isize type, expected integer"));
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};
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Ok(NativeValue { isize_value })
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}
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#[inline]
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pub fn ffi_parse_f32_arg(
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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let f32_value = v8::Local::<v8::Number>::try_from(arg)
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.map_err(|_| type_error("Invalid FFI f32 type, expected number"))?
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.value() as f32;
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Ok(NativeValue { f32_value })
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}
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#[inline]
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pub fn ffi_parse_f64_arg(
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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let f64_value = v8::Local::<v8::Number>::try_from(arg)
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.map_err(|_| type_error("Invalid FFI f64 type, expected number"))?
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.value() as f64;
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Ok(NativeValue { f64_value })
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}
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#[inline]
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pub fn ffi_parse_pointer_arg(
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scope: &mut v8::HandleScope,
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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// Order of checking:
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// 1. BigInt: Uncommon and not supported by Fast API, optimise this case.
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// 2. Number: Common and supported by Fast API.
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// 3. Null: Very uncommon / can be represented by a 0.
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let pointer = if let Ok(value) = v8::Local::<v8::BigInt>::try_from(arg) {
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value.u64_value().0 as usize as *mut c_void
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} else if let Ok(value) = v8::Local::<v8::Number>::try_from(arg) {
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value.integer_value(scope).unwrap() as usize as *mut c_void
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} else if arg.is_null() {
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ptr::null_mut()
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} else {
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return Err(type_error(
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"Invalid FFI pointer type, expected null, integer or BigInt",
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));
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};
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Ok(NativeValue { pointer })
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}
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#[inline]
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pub fn ffi_parse_buffer_arg(
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scope: &mut v8::HandleScope,
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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// Order of checking:
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// 1. ArrayBuffer: Fairly common and not supported by Fast API, optimise this case.
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// 2. ArrayBufferView: Common and supported by Fast API
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// 5. Null: Very uncommon / can be represented by a 0.
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let pointer = if let Ok(value) = v8::Local::<v8::ArrayBuffer>::try_from(arg) {
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if let Some(non_null) = value.data() {
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non_null.as_ptr()
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} else {
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ptr::null_mut()
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}
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} else if let Ok(value) = v8::Local::<v8::ArrayBufferView>::try_from(arg) {
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let byte_offset = value.byte_offset();
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let pointer = value
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.buffer(scope)
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.ok_or_else(|| {
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type_error("Invalid FFI ArrayBufferView, expected data in the buffer")
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})?
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.data();
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if let Some(non_null) = pointer {
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// SAFETY: Pointer is non-null, and V8 guarantees that the byte_offset
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// is within the buffer backing store.
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unsafe { non_null.as_ptr().add(byte_offset) }
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} else {
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ptr::null_mut()
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}
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} else if arg.is_null() {
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ptr::null_mut()
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} else {
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return Err(type_error(
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"Invalid FFI buffer type, expected null, ArrayBuffer, or ArrayBufferView",
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));
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};
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Ok(NativeValue { pointer })
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}
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#[inline]
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pub fn ffi_parse_function_arg(
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scope: &mut v8::HandleScope,
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arg: v8::Local<v8::Value>,
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) -> Result<NativeValue, AnyError> {
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// Order of checking:
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// 1. BigInt: Uncommon and not supported by Fast API, optimise this case.
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|
// 2. Number: Common and supported by Fast API, optimise this case as second.
|
|
// 3. Null: Very uncommon / can be represented by a 0.
|
|
let pointer = if let Ok(value) = v8::Local::<v8::BigInt>::try_from(arg) {
|
|
value.u64_value().0 as usize as *mut c_void
|
|
} else if let Ok(value) = v8::Local::<v8::Number>::try_from(arg) {
|
|
value.integer_value(scope).unwrap() as usize as *mut c_void
|
|
} else if arg.is_null() {
|
|
ptr::null_mut()
|
|
} else {
|
|
return Err(type_error(
|
|
"Invalid FFI function type, expected null, integer, or BigInt",
|
|
));
|
|
};
|
|
Ok(NativeValue { pointer })
|
|
}
|
|
|
|
pub fn ffi_parse_args<'scope>(
|
|
scope: &mut v8::HandleScope<'scope>,
|
|
args: serde_v8::Value<'scope>,
|
|
parameter_types: &[NativeType],
|
|
) -> Result<Vec<NativeValue>, AnyError>
|
|
where
|
|
'scope: 'scope,
|
|
{
|
|
if parameter_types.is_empty() {
|
|
return Ok(vec![]);
|
|
}
|
|
|
|
let args = v8::Local::<v8::Array>::try_from(args.v8_value)
|
|
.map_err(|_| type_error("Invalid FFI parameters, expected Array"))?;
|
|
let mut ffi_args: Vec<NativeValue> =
|
|
Vec::with_capacity(parameter_types.len());
|
|
|
|
for (index, native_type) in parameter_types.iter().enumerate() {
|
|
let value = args.get_index(scope, index as u32).unwrap();
|
|
match native_type {
|
|
NativeType::Bool => {
|
|
ffi_args.push(ffi_parse_bool_arg(value)?);
|
|
}
|
|
NativeType::U8 => {
|
|
ffi_args.push(ffi_parse_u8_arg(value)?);
|
|
}
|
|
NativeType::I8 => {
|
|
ffi_args.push(ffi_parse_i8_arg(value)?);
|
|
}
|
|
NativeType::U16 => {
|
|
ffi_args.push(ffi_parse_u16_arg(value)?);
|
|
}
|
|
NativeType::I16 => {
|
|
ffi_args.push(ffi_parse_i16_arg(value)?);
|
|
}
|
|
NativeType::U32 => {
|
|
ffi_args.push(ffi_parse_u32_arg(value)?);
|
|
}
|
|
NativeType::I32 => {
|
|
ffi_args.push(ffi_parse_i32_arg(value)?);
|
|
}
|
|
NativeType::U64 => {
|
|
ffi_args.push(ffi_parse_u64_arg(scope, value)?);
|
|
}
|
|
NativeType::I64 => {
|
|
ffi_args.push(ffi_parse_i64_arg(scope, value)?);
|
|
}
|
|
NativeType::USize => {
|
|
ffi_args.push(ffi_parse_usize_arg(scope, value)?);
|
|
}
|
|
NativeType::ISize => {
|
|
ffi_args.push(ffi_parse_isize_arg(scope, value)?);
|
|
}
|
|
NativeType::F32 => {
|
|
ffi_args.push(ffi_parse_f32_arg(value)?);
|
|
}
|
|
NativeType::F64 => {
|
|
ffi_args.push(ffi_parse_f64_arg(value)?);
|
|
}
|
|
NativeType::Buffer => {
|
|
ffi_args.push(ffi_parse_buffer_arg(scope, value)?);
|
|
}
|
|
NativeType::Pointer => {
|
|
ffi_args.push(ffi_parse_pointer_arg(scope, value)?);
|
|
}
|
|
NativeType::Function => {
|
|
ffi_args.push(ffi_parse_function_arg(scope, value)?);
|
|
}
|
|
NativeType::Void => {
|
|
unreachable!();
|
|
}
|
|
}
|
|
}
|
|
|
|
Ok(ffi_args)
|
|
}
|