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"""
Make sure that we handle an expression on a thread, if
the thread exits while the expression is running.
"""
import lldb
from lldbsuite.test.decorators import *
import lldbsuite.test.lldbutil as lldbutil
from lldbsuite.test.lldbtest import *
class TestExitDuringExpression(TestBase):
NO_DEBUG_INFO_TESTCASE = True
@skipIfWindows
@skipIf(oslist=["linux"], archs=["arm", "aarch64"], bugnumber="llvm.org/pr48414")
@expectedFailureAll(oslist=["freebsd"], bugnumber="llvm.org/pr48414")
@expectedFailureNetBSD
def test_exit_before_one_thread_unwind(self):
"""Test the case where we exit within the one thread timeout"""
self.exiting_expression_test(True, True)
@skipIfWindows
@skipIf(oslist=["linux"], archs=["arm", "aarch64"], bugnumber="llvm.org/pr48414")
@expectedFailureAll(oslist=["freebsd"], bugnumber="llvm.org/pr48414")
@expectedFailureNetBSD
def test_exit_before_one_thread_no_unwind(self):
"""Test the case where we exit within the one thread timeout"""
self.exiting_expression_test(True, False)
@skipIfWindows
def test_exit_after_one_thread_unwind(self):
"""Test the case where we exit within the one thread timeout"""
self.exiting_expression_test(False, True)
@skipIfWindows
def test_exit_after_one_thread_no_unwind(self):
"""Test the case where we exit within the one thread timeout"""
self.exiting_expression_test(False, False)
def setUp(self):
TestBase.setUp(self)
self.main_source_file = lldb.SBFileSpec("main.c")
self.build()
def exiting_expression_test(self, before_one_thread_timeout, unwind):
"""function_to_call sleeps for g_timeout microseconds, then calls pthread_exit.
This test calls function_to_call with an overall timeout of 500
microseconds, and a one_thread_timeout as passed in.
It also sets unwind_on_exit for the call to the unwind passed in.
This allows you to have the thread exit either before the one thread
timeout is passed."""
(target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
self, "Break here and cause the thread to exit", self.main_source_file
)
# We'll continue to this breakpoint after running our expression:
return_bkpt = target.BreakpointCreateBySourceRegex(
"Break here to make sure the thread exited", self.main_source_file
)
frame = thread.frames[0]
tid = thread.GetThreadID()
# Find the timeout:
var_options = lldb.SBVariablesOptions()
var_options.SetIncludeArguments(False)
var_options.SetIncludeLocals(False)
var_options.SetIncludeStatics(True)
value_list = frame.GetVariables(var_options)
g_timeout = value_list.GetFirstValueByName("g_timeout")
self.assertTrue(g_timeout.IsValid(), "Found g_timeout")
error = lldb.SBError()
timeout_value = g_timeout.GetValueAsUnsigned(error)
self.assertSuccess(error, "Couldn't get timeout value")
one_thread_timeout = 0
if before_one_thread_timeout:
one_thread_timeout = timeout_value * 2
else:
one_thread_timeout = int(timeout_value / 2)
options = lldb.SBExpressionOptions()
options.SetUnwindOnError(unwind)
options.SetOneThreadTimeoutInMicroSeconds(one_thread_timeout)
options.SetTimeoutInMicroSeconds(4 * timeout_value)
result = frame.EvaluateExpression("function_to_call()", options)
# Make sure the thread actually exited:
thread = process.GetThreadByID(tid)
self.assertFalse(thread.IsValid(), "The thread exited")
# Make sure the expression failed:
self.assertFalse(result.GetError().Success(), "Expression failed.")
# Make sure we can keep going:
threads = lldbutil.continue_to_breakpoint(process, return_bkpt)
if not threads:
self.fail("didn't get any threads back after continuing")
self.assertEqual(len(threads), 1, "One thread hit our breakpoint")
thread = threads[0]
frame = thread.frames[0]
# Now get the return value, if we successfully caused the thread to exit
# it should be 10, not 20.
ret_val = frame.FindVariable("ret_val")
self.assertSuccess(ret_val.GetError(), "Found ret_val")
ret_val_value = ret_val.GetValueAsSigned(error)
self.assertSuccess(error, "Got ret_val's value")
self.assertEqual(ret_val_value, 10, "We put the right value in ret_val")
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