File size: 8,308 Bytes
dabfdaa | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 | use serde_json::Value as JsonValue;
use super::CompletionState;
use super::EXIT_SENTINEL;
use super::RuntimeState;
use super::value::json_to_v8;
use super::value::value_to_error_text;
pub(super) fn evaluate_main_module(
scope: &mut v8::PinScope<'_, '_>,
source_text: &str,
) -> Result<Option<v8::Global<v8::Promise>>, String> {
let tc = std::pin::pin!(v8::TryCatch::new(scope));
let mut tc = tc.init();
let source = v8::String::new(&tc, source_text)
.ok_or_else(|| "failed to allocate exec source".to_string())?;
let origin = script_origin(&mut tc, "exec_main.mjs")?;
let mut source = v8::script_compiler::Source::new(source, Some(&origin));
let module = v8::script_compiler::compile_module(&tc, &mut source).ok_or_else(|| {
tc.exception()
.map(|exception| value_to_error_text(&mut tc, exception))
.unwrap_or_else(|| "unknown code mode exception".to_string())
})?;
module
.instantiate_module(&tc, resolve_module_callback)
.ok_or_else(|| {
tc.exception()
.map(|exception| value_to_error_text(&mut tc, exception))
.unwrap_or_else(|| "unknown code mode exception".to_string())
})?;
let result = match module.evaluate(&tc) {
Some(result) => result,
None => {
if let Some(exception) = tc.exception() {
if is_exit_exception(&mut tc, exception) {
return Ok(None);
}
return Err(value_to_error_text(&mut tc, exception));
}
return Err("unknown code mode exception".to_string());
}
};
tc.perform_microtask_checkpoint();
if result.is_promise() {
let promise = v8::Local::<v8::Promise>::try_from(result)
.map_err(|_| "failed to read exec promise".to_string())?;
return Ok(Some(v8::Global::new(&tc, promise)));
}
Ok(None)
}
fn is_exit_exception(
scope: &mut v8::PinScope<'_, '_>,
exception: v8::Local<'_, v8::Value>,
) -> bool {
scope
.get_slot::<RuntimeState>()
.map(|state| state.exit_requested)
.unwrap_or(false)
&& exception.is_string()
&& exception.to_rust_string_lossy(scope) == EXIT_SENTINEL
}
pub(super) fn resolve_tool_response(
scope: &mut v8::PinScope<'_, '_>,
id: &str,
response: Result<JsonValue, String>,
) -> Result<(), String> {
let resolver = {
let state = scope
.get_slot_mut::<RuntimeState>()
.ok_or_else(|| "runtime state unavailable".to_string())?;
state.pending_tool_calls.remove(id)
}
.ok_or_else(|| format!("unknown tool call `{id}`"))?;
// Release delivery handles before the cell ends; live promises retain their results.
v8::scope!(let scope, scope);
let tc = std::pin::pin!(v8::TryCatch::new(scope));
let mut tc = tc.init();
let resolver = v8::Local::new(&tc, &resolver);
match response {
Ok(result) => {
let value = json_to_v8(&mut tc, &result)
.ok_or_else(|| "failed to serialize tool response".to_string())?;
resolver.resolve(&tc, value);
}
Err(error_text) => {
let value = v8::String::new(&tc, &error_text)
.ok_or_else(|| "failed to allocate tool error".to_string())?;
resolver.reject(&tc, value.into());
}
}
if tc.has_caught() {
return Err(tc
.exception()
.map(|exception| value_to_error_text(&mut tc, exception))
.unwrap_or_else(|| "unknown code mode exception".to_string()));
}
Ok(())
}
pub(super) fn completion_state(
scope: &mut v8::PinScope<'_, '_>,
pending_promise: Option<&v8::Global<v8::Promise>>,
) -> CompletionState {
let stored_value_writes = scope
.get_slot::<RuntimeState>()
.map(|state| state.stored_value_writes.clone())
.unwrap_or_default();
let Some(pending_promise) = pending_promise else {
return CompletionState::Completed {
stored_value_writes,
error_text: None,
};
};
let promise = v8::Local::new(scope, pending_promise);
match promise.state() {
v8::PromiseState::Pending => CompletionState::Pending,
v8::PromiseState::Fulfilled => CompletionState::Completed {
stored_value_writes,
error_text: None,
},
v8::PromiseState::Rejected => {
let result = promise.result(scope);
let error_text = if is_exit_exception(scope, result) {
None
} else {
Some(value_to_error_text(scope, result))
};
CompletionState::Completed {
stored_value_writes,
error_text,
}
}
}
}
fn script_origin<'s>(
scope: &mut v8::PinScope<'s, '_>,
resource_name_: &str,
) -> Result<v8::ScriptOrigin<'s>, String> {
let resource_name = v8::String::new(scope, resource_name_)
.ok_or_else(|| "failed to allocate script origin".to_string())?;
let source_map_url = v8::String::new(scope, resource_name_)
.ok_or_else(|| "failed to allocate source map url".to_string())?;
Ok(v8::ScriptOrigin::new(
scope,
resource_name.into(),
0,
0,
true,
0,
Some(source_map_url.into()),
true,
false,
true,
None,
))
}
fn resolve_module_callback<'s>(
context: v8::Local<'s, v8::Context>,
specifier: v8::Local<'s, v8::String>,
_import_attributes: v8::Local<'s, v8::FixedArray>,
_referrer: v8::Local<'s, v8::Module>,
) -> Option<v8::Local<'s, v8::Module>> {
v8::callback_scope!(unsafe scope, context);
let specifier = specifier.to_rust_string_lossy(scope);
resolve_module(scope, &specifier)
}
pub(super) fn dynamic_import_callback<'s>(
scope: &mut v8::PinScope<'s, '_>,
_host_defined_options: v8::Local<'s, v8::Data>,
_resource_name: v8::Local<'s, v8::Value>,
specifier: v8::Local<'s, v8::String>,
_import_attributes: v8::Local<'s, v8::FixedArray>,
) -> Option<v8::Local<'s, v8::Promise>> {
let specifier = specifier.to_rust_string_lossy(scope);
let resolver = v8::PromiseResolver::new(scope)?;
match resolve_module(scope, &specifier) {
Some(module) => {
if module.get_status() == v8::ModuleStatus::Uninstantiated
&& module
.instantiate_module(scope, resolve_module_callback)
.is_none()
{
let error = v8::String::new(scope, "failed to instantiate module")
.map(Into::into)
.unwrap_or_else(|| v8::undefined(scope).into());
resolver.reject(scope, error);
return Some(resolver.get_promise(scope));
}
if matches!(
module.get_status(),
v8::ModuleStatus::Instantiated | v8::ModuleStatus::Evaluated
) && module.evaluate(scope).is_none()
{
let error = v8::String::new(scope, "failed to evaluate module")
.map(Into::into)
.unwrap_or_else(|| v8::undefined(scope).into());
resolver.reject(scope, error);
return Some(resolver.get_promise(scope));
}
let namespace = module.get_module_namespace();
resolver.resolve(scope, namespace);
Some(resolver.get_promise(scope))
}
None => {
let error = v8::String::new(scope, "unsupported import in exec")
.map(Into::into)
.unwrap_or_else(|| v8::undefined(scope).into());
resolver.reject(scope, error);
Some(resolver.get_promise(scope))
}
}
}
fn resolve_module<'s>(
scope: &mut v8::PinScope<'s, '_>,
specifier: &str,
) -> Option<v8::Local<'s, v8::Module>> {
if let Some(message) =
v8::String::new(scope, &format!("Unsupported import in exec: {specifier}"))
{
scope.throw_exception(message.into());
} else {
scope.throw_exception(v8::undefined(scope).into());
}
None
}
#[cfg(test)]
#[path = "module_loader_tests.rs"]
mod tests;
|