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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
use crate::metrics::Metrics;
use crate::permissions::Permissions;
use deno_core::error::AnyError;
use deno_core::serde_json;
use deno_core::serde_json::json;
use deno_core::serde_json::Value;
use deno_core::ModuleSpecifier;
use deno_core::OpState;
use deno_core::ZeroCopyBuf;
pub fn init(rt: &mut deno_core::JsRuntime, main_module: ModuleSpecifier) {
{
let op_state = rt.op_state();
let mut state = op_state.borrow_mut();
state.put::<ModuleSpecifier>(main_module);
}
super::reg_json_sync(rt, "op_main_module", op_main_module);
super::reg_json_sync(rt, "op_metrics", op_metrics);
}
fn op_main_module(
state: &mut OpState,
_args: Value,
_zero_copy: &mut [ZeroCopyBuf],
) -> Result<Value, AnyError> {
let main = state.borrow::<ModuleSpecifier>().to_string();
let main_url = ModuleSpecifier::resolve_url_or_path(&main)?;
if main_url.as_url().scheme() == "file" {
let main_path = std::env::current_dir().unwrap().join(main_url.to_string());
state
.borrow::<Permissions>()
.check_read_blind(&main_path, "main_module")?;
}
Ok(json!(&main))
}
fn op_metrics(
state: &mut OpState,
_args: Value,
_zero_copy: &mut [ZeroCopyBuf],
) -> Result<Value, AnyError> {
let m = state.borrow::<Metrics>();
Ok(json!({
"opsDispatched": m.ops_dispatched,
"opsDispatchedSync": m.ops_dispatched_sync,
"opsDispatchedAsync": m.ops_dispatched_async,
"opsDispatchedAsyncUnref": m.ops_dispatched_async_unref,
"opsCompleted": m.ops_completed,
"opsCompletedSync": m.ops_completed_sync,
"opsCompletedAsync": m.ops_completed_async,
"opsCompletedAsyncUnref": m.ops_completed_async_unref,
"bytesSentControl": m.bytes_sent_control,
"bytesSentData": m.bytes_sent_data,
"bytesReceived": m.bytes_received
}))
}
pub fn ppid() -> Value {
#[cfg(windows)]
{
// Adopted from rustup:
// https://github.com/rust-lang/rustup/blob/1.21.1/src/cli/self_update.rs#L1036
// Copyright Diggory Blake, the Mozilla Corporation, and rustup contributors.
// Licensed under either of
// - Apache License, Version 2.0
// - MIT license
use std::mem;
use winapi::shared::minwindef::DWORD;
use winapi::um::handleapi::{CloseHandle, INVALID_HANDLE_VALUE};
use winapi::um::processthreadsapi::GetCurrentProcessId;
use winapi::um::tlhelp32::{
CreateToolhelp32Snapshot, Process32First, Process32Next, PROCESSENTRY32,
TH32CS_SNAPPROCESS,
};
unsafe {
// Take a snapshot of system processes, one of which is ours
// and contains our parent's pid
let snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
if snapshot == INVALID_HANDLE_VALUE {
return serde_json::to_value(-1).unwrap();
}
let mut entry: PROCESSENTRY32 = mem::zeroed();
entry.dwSize = mem::size_of::<PROCESSENTRY32>() as DWORD;
// Iterate over system processes looking for ours
let success = Process32First(snapshot, &mut entry);
if success == 0 {
CloseHandle(snapshot);
return serde_json::to_value(-1).unwrap();
}
let this_pid = GetCurrentProcessId();
while entry.th32ProcessID != this_pid {
let success = Process32Next(snapshot, &mut entry);
if success == 0 {
CloseHandle(snapshot);
return serde_json::to_value(-1).unwrap();
}
}
CloseHandle(snapshot);
// FIXME: Using the process ID exposes a race condition
// wherein the parent process already exited and the OS
// reassigned its ID.
let parent_id = entry.th32ParentProcessID;
serde_json::to_value(parent_id).unwrap()
}
}
#[cfg(not(windows))]
{
use std::os::unix::process::parent_id;
serde_json::to_value(parent_id()).unwrap()
}
}
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