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"""
Test that if you exec lldb with the stdio file handles
closed, it is able to exit without hanging.
"""
import lldb
import os
import sys
import socket
if os.name != "nt":
import fcntl
import lldbsuite.test.lldbutil as lldbutil
from lldbsuite.test.lldbtest import *
from lldbsuite.test.decorators import *
class TestDriverWithClosedSTDIO(TestBase):
# If your test case doesn't stress debug info, then
# set this to true. That way it won't be run once for
# each debug info format.
NO_DEBUG_INFO_TESTCASE = True
# Windows doesn't have the fcntl module, so we can't run this
# test there.
@skipIf(hostoslist=["windows"])
def test_run_lldb_and_wait(self):
"""This test forks, closes the stdio channels and exec's lldb.
Then it waits for it to exit and asserts it did that successfully"""
pid = os.fork()
if pid == 0:
fcntl.fcntl(sys.stdin, fcntl.F_SETFD, fcntl.FD_CLOEXEC)
fcntl.fcntl(sys.stdout, fcntl.F_SETFD, fcntl.FD_CLOEXEC)
fcntl.fcntl(sys.stderr, fcntl.F_SETFD, fcntl.FD_CLOEXEC)
lldb = lldbtest_config.lldbExec
print(f"About to run: {lldb}")
os.execlp(
lldb,
lldb,
"-x",
"-o",
"script print(lldb.debugger.GetNumTargets())",
"--batch",
)
else:
if pid == -1:
print("Couldn't fork a process.")
return
ret_pid, status = os.waitpid(pid, 0)
# We're really just checking that lldb doesn't stall.
# At the time this test was written, if you close stdin
# in an asserts build, lldb aborts. So handle both
# of those cases. The failure will just be that the
# waitpid doesn't return, and the test times out.
self.assertFalse(os.WIFSTOPPED(status), "We either exited or crashed.")
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