llvm/test/Support/interrupts.test

## Show that SIGINT and similar signals don't cause crash messages to be
## reported.
# RUN: %python %s wrapper llvm-symbolizer 2> %t.err
# RUN: count 0 < %t.err

import os
import signal
import subprocess
import sys
import time

def run_symbolizer():
    proc = subprocess.Popen([sys.argv[2]], stdout=subprocess.PIPE, stdin=subprocess.PIPE)
    # Write then read some output to ensure the process has started fully.
    proc.stdin.write(b'foo\n')
    proc.stdin.flush()
    proc.stdout.readline()
    # Windows handles signals differently.
    if os.name == 'nt':
        os.kill(0, signal.CTRL_BREAK_EVENT)
    else:
        proc.send_signal(signal.SIGINT)

# On Windows, this function spawns the subprocess in its own (hidden) console,
# so that signals do not interfere with the calling test. This isn't necessary
# on other systems.
def run_wrapper():
    args = [sys.executable, __file__, 'symbolizer'] + sys.argv[2:]
    if os.name == 'nt':
        startupinfo = subprocess.STARTUPINFO()
        startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
        proc = subprocess.Popen(args,
                                stderr=sys.stderr,
                                startupinfo=startupinfo,
                                creationflags=subprocess.CREATE_NEW_CONSOLE)
    else:
        proc = subprocess.Popen(args,
                                stderr=subprocess.PIPE)

if sys.argv[1] == 'wrapper':
    run_wrapper()
else:
    run_symbolizer()