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vm.rs
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vm.rs
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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
use deno_core::error::type_error;
use deno_core::error::AnyError;
use deno_core::op2;
use deno_core::v8;
use super::vm_internal as i;
pub use i::create_v8_context;
pub use i::init_global_template;
pub use i::ContextInitMode;
pub use i::DEFINER_MAP_FN;
pub use i::DELETER_MAP_FN;
pub use i::DESCRIPTOR_MAP_FN;
pub use i::ENUMERATOR_MAP_FN;
pub use i::GETTER_MAP_FN;
pub use i::SETTER_MAP_FN;
pub use i::INDEXED_DEFINER_MAP_FN;
pub use i::INDEXED_DELETER_MAP_FN;
pub use i::INDEXED_DESCRIPTOR_MAP_FN;
pub use i::INDEXED_GETTER_MAP_FN;
pub use i::INDEXED_SETTER_MAP_FN;
pub struct Script {
inner: i::ContextifyScript,
}
impl Script {
fn new(
scope: &mut v8::HandleScope,
source: v8::Local<v8::String>,
) -> Result<Self, AnyError> {
Ok(Self {
inner: i::ContextifyScript::new(scope, source)?,
})
}
fn run_in_this_context<'s>(
&self,
scope: &'s mut v8::HandleScope,
) -> Result<v8::Local<'s, v8::Value>, AnyError> {
let context = scope.get_current_context();
let context_scope = &mut v8::ContextScope::new(scope, context);
let mut scope = v8::EscapableHandleScope::new(context_scope);
let result = self
.inner
.eval_machine(&mut scope, context)
.unwrap_or_else(|| v8::undefined(&mut scope).into());
Ok(scope.escape(result))
}
fn run_in_context<'s>(
&self,
scope: &mut v8::HandleScope<'s>,
sandbox: v8::Local<'s, v8::Value>,
) -> Result<v8::Local<'s, v8::Value>, AnyError> {
let context = if let Ok(sandbox_obj) = sandbox.try_into() {
let context = i::ContextifyContext::from_sandbox_obj(scope, sandbox_obj)
.ok_or_else(|| type_error("Invalid sandbox object"))?;
context.context(scope)
} else {
scope.get_current_context()
};
let context_scope = &mut v8::ContextScope::new(scope, context);
let mut scope = v8::EscapableHandleScope::new(context_scope);
let result = self
.inner
.eval_machine(&mut scope, context)
.unwrap_or_else(|| v8::undefined(&mut scope).into());
Ok(scope.escape(result))
}
}
#[op2]
pub fn op_vm_create_script<'a>(
scope: &mut v8::HandleScope<'a>,
source: v8::Local<'a, v8::String>,
) -> Result<v8::Local<'a, v8::Object>, AnyError> {
let script = Script::new(scope, source)?;
Ok(deno_core::cppgc::make_cppgc_object(scope, script))
}
#[op2(reentrant)]
pub fn op_vm_script_run_in_context<'a>(
scope: &mut v8::HandleScope<'a>,
#[cppgc] script: &Script,
sandbox: v8::Local<'a, v8::Value>,
) -> Result<v8::Local<'a, v8::Value>, AnyError> {
script.run_in_context(scope, sandbox)
}
#[op2(reentrant)]
pub fn op_vm_script_run_in_this_context<'a>(
scope: &'a mut v8::HandleScope,
#[cppgc] script: &Script,
) -> Result<v8::Local<'a, v8::Value>, AnyError> {
script.run_in_this_context(scope)
}
#[op2]
pub fn op_vm_create_context(
scope: &mut v8::HandleScope,
sandbox_obj: v8::Local<v8::Object>,
) {
// Don't allow contextifying a sandbox multiple times.
assert!(!i::ContextifyContext::is_contextify_context(
scope,
sandbox_obj
));
i::ContextifyContext::attach(scope, sandbox_obj);
}
#[op2]
pub fn op_vm_is_context(
scope: &mut v8::HandleScope,
sandbox_obj: v8::Local<v8::Value>,
) -> bool {
sandbox_obj
.try_into()
.map(|sandbox_obj| {
i::ContextifyContext::is_contextify_context(scope, sandbox_obj)
})
.unwrap_or(false)
}
#[cfg(test)]
mod tests {
use super::*;
use deno_core::v8;
#[test]
fn test_run_in_this_context() {
let platform = v8::new_default_platform(0, false).make_shared();
v8::V8::initialize_platform(platform);
v8::V8::initialize();
let isolate = &mut v8::Isolate::new(Default::default());
let scope = &mut v8::HandleScope::new(isolate);
let context = v8::Context::new(scope);
let scope = &mut v8::ContextScope::new(scope, context);
let source = v8::String::new(scope, "1 + 2").unwrap();
let script = Script::new(scope, source).unwrap();
let result = script.run_in_this_context(scope).unwrap();
assert!(result.is_number());
}
}