The 'Can't backtrace now' message takes over 10 seconds to return.
That's too much time to have to wait for a test, and when it times
out, it was causing an orphaned node process.
This cleans up the node process, and also removes the test that's
timing out, so that the case is hit less often.
Todo: Make the backtrace message come back faster.
simple/test-debugger-repl has a tendency to fail and leave behind a stray
process that listens on common.PORT, making later tests fail with EADDRINUSE.
`process.debug_port` is useful for changing debugger port in runtime,
before starting it (via SIGUSR1).
Using `--port=` argument for debugger repl, tests will run debugger
server on a `common.PORT` (as it usually does for any other servers).
`process._debugEnd()` stops debugger and its server.
* debugger: implemented process._debugEnd(), `node debug --port=5858 app.js`
* test: start debugger repl on common.PORT
* fixes#2613
* fixes#2614
It was decided that the performance benefits that isolates offer (faster spin-up
times for worker processes, faster inter-worker communication, possibly a lower
memory footprint) are not actual bottlenecks for most people and do not outweigh
the potential stability issues and intrusive changes to the code base that
first-class support for isolates requires.
Hence, this commit backs out all isolates-related changes.
Good bye, isolates. We hardly knew ye.
* remove useless clearline call at Interface start
* silence after .handleBreak()
* output '\b' if this.stdout is not a tty (debugger)
* add '\b' checks for clearline (test)
* Don't buffer command, before it's execution (repl)
* `quit` command, custom streams for .start, stubbed out test, disable
history repeation for non-tty (debugger)
Fedor Indutny