// DumpStackOnSIGQUIT listens for a SIGQUIT signal and writes stack dump to the
// given io.Writer when one is received. Blocks, so spawn it as a goroutine.
func DumpStackOnSIGQUIT(curAgent **Agent) {
in := make(chan os.Signal)
signal.Notify(in, syscall.SIGQUIT)
for _ = range in {
agt := *curAgent
stackBytes := util.DebugTrace()
task, command := taskAndCommand(agt)
// we dump to files and logs without blocking, in case our logging is deadlocked or broken
go dumpToDisk(task, command, stackBytes)
go dumpToLogs(task, command, stackBytes, agt)
}
}
func TestAgentDebugHandler(t *testing.T) {
setupTlsConfigs(t)
for tlsString, tlsConfig := range tlsConfigs {
Convey("With an agent that has not been started", t, func() {
testAgent, err := New("", "task1", "task1", "", testConfig.Api.HttpsCert, testPidFile)
So(err, ShouldBeNil)
Convey("no task or command should be listed", func() {
task, command := taskAndCommand(testAgent)
So(task, ShouldEqual, "no running task")
So(command, ShouldEqual, "no running command")
})
})
Convey("With agent running a slow test and live API server over "+tlsString, t, func() {
testTask, _, err := setupAPITestData(testConfig, "timeout_task", "linux-64",
filepath.Join(testDirectory, "testdata/config_test_plugin/project/evergreen-ci-render.yml"), NoPatch, t)
testutil.HandleTestingErr(err, t, "Failed to find test task")
testServer, err := service.CreateTestServer(testConfig, tlsConfig, plugin.APIPlugins, Verbose)
testutil.HandleTestingErr(err, t, "Couldn't create apiserver: %v", err)
testAgent, err := New(testServer.URL, testTask.Id, testTask.Secret, "", testConfig.Api.HttpsCert, testPidFile)
So(err, ShouldBeNil)
So(testAgent, ShouldNotBeNil)
Convey("the agent should return the correct running task, command, and trace", func() {
// run the slow task and take a debug trace during.
var stack []byte
var task, command string
done := make(chan struct{})
go func() {
time.Sleep(time.Second)
task, command = taskAndCommand(testAgent)
stack = util.DebugTrace()
dumpToLogs(task, command, stack, testAgent)
done <- struct{}{}
}()
testAgent.RunTask()
testAgent.APILogger.Flush()
<-done
So(task, ShouldEqual, testTask.Id)
So(command, ShouldEqual, "shell.exec")
gcTesting := "testing.RunTests" // we know this will be present in the trace
So(string(stack), ShouldContainSubstring, gcTesting)
Convey("which should also be present in the logs", func() {
So(scanLogsForTask(testTask.Id, "", gcTesting), ShouldBeTrue)
})
})
})
}
}