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|
package internal
import (
"context"
"ior/internal/event"
"ior/internal/types"
"syscall"
"testing"
)
const (
defaulTime = 1234567
defaultPid = 10
defaultTid = 11
)
type testData struct {
// All the raw tracepoints sent to the event loop
rawTracepoints [][]byte
// Validation functions to be called on the event loop output
validates []func(t *testing.T, el *eventLoop, ev *event.Pair)
}
func TestEventloop(t *testing.T) {
testTable := map[string]testData{
"OpenEventTest1": makeOpenEventTestData1(t),
"OpenEventTest2": makeOpenEventTestData2(t),
"OpenEventTest3": makeOpenEventTestData3(t),
// FdEvent tests
"ReadEventTest": makeReadEventTestData(t),
"WriteEventTest": makeWriteEventTestData(t),
"CloseEventTest": makeCloseEventTestData(t),
// PathEvent tests
"MkdirEventTest": makeMkdirEventTestData(t),
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
inCh := make(chan []byte)
outCh := make(chan *event.Pair)
el := newEventLoop()
el.printCb = func(ev *event.Pair) { outCh <- ev }
go el.run(ctx, inCh)
for testName, td := range testTable {
t.Run(testName, func(t *testing.T) {
go func() {
for _, raw := range td.rawTracepoints {
t.Log("Sending raw tracepoint", raw, "simulating BPF sending this")
inCh <- raw
}
}()
for _, validate := range td.validates {
ep := <-outCh
t.Log("Received", ep)
validate(t, el, ep)
}
select {
case x := <-outCh:
t.Errorf("Expected no more events but got '%v'", x)
default:
}
})
}
}
// Tests a simple enter/exit pair of tracepoints.
func makeOpenEventTestData1(t *testing.T) (td testData) {
enterEv, enterEvBytes := makeEnterOpenEvent(t, defaulTime, defaultPid, defaultTid)
td.rawTracepoints = append(td.rawTracepoints, enterEvBytes)
exitEv, exitEvBytes := makeExitOpenEvent(t, defaulTime, defaultPid, defaultTid)
td.rawTracepoints = append(td.rawTracepoints, exitEvBytes)
td.validates = append(td.validates, func(t *testing.T, el *eventLoop, ep *event.Pair) {
if !enterEv.Equals(ep.EnterEv) {
t.Errorf("Expected '%v' but got '%v'", enterEv, ep.EnterEv)
}
if !exitEv.Equals(ep.ExitEv) {
t.Errorf("Expected '%v' but got '%v'", exitEv, ep.ExitEv)
}
filenameA := ep.FileName()
filenameB := types.StringValue(enterEv.Filename[:])
if filenameA != filenameB {
t.Errorf("Expected file name '%v' but got '%v'", filenameB, filenameA)
}
comm := types.StringValue(enterEv.Comm[:])
if ep.Comm != comm {
t.Errorf("Expected comm name '%v' but got '%v'", comm, ep.Comm)
}
})
return td
}
// Tests skipping of incomplete enter/exit tracepoints.
func makeOpenEventTestData2(t *testing.T) (td testData) {
// Almost the same, but with duplicates
td1 := makeOpenEventTestData1(t)
td.rawTracepoints = append(td.rawTracepoints, td1.rawTracepoints[1]) // Will be ignored by the event loop
td.rawTracepoints = append(td.rawTracepoints, td1.rawTracepoints[0]) // Will be used by the event loop
td.rawTracepoints = append(td.rawTracepoints, td1.rawTracepoints[0]) // Will be ignored by the event loop
td.rawTracepoints = append(td.rawTracepoints, td1.rawTracepoints[1]) // Will be used by the event loop
td.rawTracepoints = append(td.rawTracepoints, td1.rawTracepoints[1]) // Will be ignored by the event loop
td.validates = td1.validates
return td
}
// Tests 2 parallel tracepoints but from different threads.
func makeOpenEventTestData3(t *testing.T) (td testData) {
enterEv1, enterEvBytes1 := makeEnterOpenEvent(t, defaulTime, defaultPid, defaultTid)
enterEv2, enterEvBytes2 := makeEnterOpenEvent(t, defaulTime+1, defaultPid, defaultTid+1)
td.rawTracepoints = append(td.rawTracepoints, enterEvBytes1)
td.rawTracepoints = append(td.rawTracepoints, enterEvBytes2)
exitEv1, exitEvBytes1 := makeExitOpenEvent(t, defaulTime+2, defaultPid, defaultTid)
exitEv2, exitEvBytes2 := makeExitOpenEvent(t, defaulTime+3, defaultPid, defaultTid+1)
td.rawTracepoints = append(td.rawTracepoints, exitEvBytes1)
td.rawTracepoints = append(td.rawTracepoints, exitEvBytes2)
td.validates = append(td.validates, func(t *testing.T, el *eventLoop, ep *event.Pair) {
if !enterEv1.Equals(ep.EnterEv) {
t.Errorf("Expected '%v' but got '%v'", enterEv1, ep.EnterEv)
}
if !exitEv1.Equals(ep.ExitEv) {
t.Errorf("Expected '%v' but got '%v'", exitEv1, ep.ExitEv)
}
})
td.validates = append(td.validates, func(t *testing.T, el *eventLoop, ep *event.Pair) {
if !enterEv2.Equals(ep.EnterEv) {
t.Errorf("Expected '%v' but got '%v'", enterEv2, ep.EnterEv)
}
if !exitEv2.Equals(ep.ExitEv) {
t.Errorf("Expected '%v' but got '%v'", exitEv2, ep.ExitEv)
}
})
return td
}
func makeEnterOpenEvent(t *testing.T, time uint64, pid, tid uint32) (types.OpenEvent, []byte) {
ev := types.OpenEvent{
EventType: types.ENTER_OPEN_EVENT,
TraceId: types.SYS_ENTER_OPENAT,
Time: time,
Pid: pid,
Tid: tid,
Flags: syscall.O_RDWR,
Filename: [types.MAX_FILENAME_LENGTH]byte{},
Comm: [types.MAX_PROGNAME_LENGTH]byte{},
}
copy(ev.Filename[:], "testfile.txt")
copy(ev.Comm[:], "testcomm")
bytes, err := ev.Bytes()
if err != nil {
t.Error(err)
}
return ev, bytes
}
func makeExitOpenEvent(t *testing.T, time uint64, pid, tid uint32) (types.RetEvent, []byte) {
ev := types.RetEvent{
EventType: types.EXIT_OPEN_EVENT,
TraceId: types.SYS_EXIT_OPENAT,
Time: time,
Ret: 42,
Pid: pid,
Tid: tid,
}
bytes, err := ev.Bytes()
if err != nil {
t.Error(err)
}
return ev, bytes
}
// Helper functions for FdEvent
func makeEnterFdEvent(t *testing.T, time uint64, pid, tid uint32, fd int32, traceId types.TraceId) (types.FdEvent, []byte) {
ev := types.FdEvent{
EventType: types.ENTER_FD_EVENT,
TraceId: traceId,
Time: time,
Pid: pid,
Tid: tid,
Fd: fd,
}
bytes, err := ev.Bytes()
if err != nil {
t.Error(err)
}
return ev, bytes
}
func makeExitFdEvent(t *testing.T, time uint64, pid, tid uint32, fd int32, traceId types.TraceId) (types.FdEvent, []byte) {
ev := types.FdEvent{
EventType: types.EXIT_FD_EVENT,
TraceId: traceId,
Time: time,
Pid: pid,
Tid: tid,
Fd: fd,
}
bytes, err := ev.Bytes()
if err != nil {
t.Error(err)
}
return ev, bytes
}
// Helper function to create exit RetEvent
func makeExitRetEvent(t *testing.T, time uint64, pid, tid uint32, traceId types.TraceId, ret int64) (types.RetEvent, []byte) {
ev := types.RetEvent{
EventType: types.EXIT_RET_EVENT,
TraceId: traceId,
Time: time,
Ret: ret,
Pid: pid,
Tid: tid,
}
bytes, err := ev.Bytes()
if err != nil {
t.Error(err)
}
return ev, bytes
}
// Test data functions for FdEvent syscalls
func makeReadEventTestData(t *testing.T) (td testData) {
fd := int32(42) // Assume file descriptor 42
enterEv, enterEvBytes := makeEnterFdEvent(t, defaulTime, defaultPid, defaultTid, fd, types.SYS_ENTER_READ)
td.rawTracepoints = append(td.rawTracepoints, enterEvBytes)
exitEv, exitEvBytes := makeExitFdEvent(t, defaulTime+100, defaultPid, defaultTid, fd, types.SYS_EXIT_READ)
td.rawTracepoints = append(td.rawTracepoints, exitEvBytes)
td.validates = append(td.validates, func(t *testing.T, el *eventLoop, ep *event.Pair) {
if !enterEv.Equals(ep.EnterEv) {
t.Errorf("Expected '%v' but got '%v'", enterEv, ep.EnterEv)
}
if !exitEv.Equals(ep.ExitEv) {
t.Errorf("Expected '%v' but got '%v'", exitEv, ep.ExitEv)
}
})
return td
}
func makeWriteEventTestData(t *testing.T) (td testData) {
fd := int32(43)
enterEv, enterEvBytes := makeEnterFdEvent(t, defaulTime, defaultPid, defaultTid, fd, types.SYS_ENTER_WRITE)
td.rawTracepoints = append(td.rawTracepoints, enterEvBytes)
exitEv, exitEvBytes := makeExitFdEvent(t, defaulTime+100, defaultPid, defaultTid, fd, types.SYS_EXIT_WRITE)
td.rawTracepoints = append(td.rawTracepoints, exitEvBytes)
td.validates = append(td.validates, func(t *testing.T, el *eventLoop, ep *event.Pair) {
if !enterEv.Equals(ep.EnterEv) {
t.Errorf("Expected '%v' but got '%v'", enterEv, ep.EnterEv)
}
if !exitEv.Equals(ep.ExitEv) {
t.Errorf("Expected '%v' but got '%v'", exitEv, ep.ExitEv)
}
})
return td
}
func makeCloseEventTestData(t *testing.T) (td testData) {
fd := int32(44)
enterEv, enterEvBytes := makeEnterFdEvent(t, defaulTime, defaultPid, defaultTid, fd, types.SYS_ENTER_CLOSE)
td.rawTracepoints = append(td.rawTracepoints, enterEvBytes)
exitEv, exitEvBytes := makeExitFdEvent(t, defaulTime+100, defaultPid, defaultTid, fd, types.SYS_EXIT_CLOSE)
td.rawTracepoints = append(td.rawTracepoints, exitEvBytes)
td.validates = append(td.validates, func(t *testing.T, el *eventLoop, ep *event.Pair) {
if !enterEv.Equals(ep.EnterEv) {
t.Errorf("Expected '%v' but got '%v'", enterEv, ep.EnterEv)
}
if !exitEv.Equals(ep.ExitEv) {
t.Errorf("Expected '%v' but got '%v'", exitEv, ep.ExitEv)
}
})
return td
}
// Helper functions for PathEvent
func makeEnterPathEvent(t *testing.T, time uint64, pid, tid uint32, pathname string, traceId types.TraceId) (types.PathEvent, []byte) {
ev := types.PathEvent{
EventType: types.ENTER_PATH_EVENT,
TraceId: traceId,
Time: time,
Pid: pid,
Tid: tid,
Pathname: [types.MAX_FILENAME_LENGTH]byte{},
}
copy(ev.Pathname[:], pathname)
bytes, err := ev.Bytes()
if err != nil {
t.Error(err)
}
return ev, bytes
}
// Test data functions for PathEvent syscalls
func makeMkdirEventTestData(t *testing.T) (td testData) {
pathname := "/tmp/testdir"
enterEv, enterEvBytes := makeEnterPathEvent(t, defaulTime, defaultPid, defaultTid, pathname, types.SYS_ENTER_MKDIR)
td.rawTracepoints = append(td.rawTracepoints, enterEvBytes)
exitEv, exitEvBytes := makeExitRetEvent(t, defaulTime+100, defaultPid, defaultTid, types.SYS_EXIT_MKDIR, 0)
td.rawTracepoints = append(td.rawTracepoints, exitEvBytes)
td.validates = append(td.validates, func(t *testing.T, el *eventLoop, ep *event.Pair) {
if !enterEv.Equals(ep.EnterEv) {
t.Errorf("Expected '%v' but got '%v'", enterEv, ep.EnterEv)
}
if !exitEv.Equals(ep.ExitEv) {
t.Errorf("Expected '%v' but got '%v'", exitEv, ep.ExitEv)
}
filenameA := types.StringValue(enterEv.Pathname[:])
if ep.File == nil {
t.Errorf("Expected file to be set")
} else if ep.File.Name() != filenameA {
t.Errorf("Expected file name '%v' but got '%v'", filenameA, ep.File.Name())
}
})
return td
}
|
