28e0a322bf
Instead of trying to be clever and make an 'educated guess' as to where the flow of control may go next, simple do the more naive, yet correct, approach of setting a breakpoint everywhere we can in the function and seeing where we end up. On top of this we were already setting a breakpoint at the return address and deferred functions, so that remains the same. This removes a lot of gnarly, hard to maintain code and takes all the guesswork out of this command. Fixes #281
722 lines
19 KiB
Go
722 lines
19 KiB
Go
package servicetest
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import (
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"fmt"
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"net"
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"os"
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"path/filepath"
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"runtime"
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"strconv"
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"testing"
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protest "github.com/derekparker/delve/proc/test"
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"github.com/derekparker/delve/service"
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"github.com/derekparker/delve/service/api"
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"github.com/derekparker/delve/service/rpc"
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)
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func init() {
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runtime.GOMAXPROCS(2)
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}
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func assertNoError(err error, t *testing.T, s string) {
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if err != nil {
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_, file, line, _ := runtime.Caller(1)
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fname := filepath.Base(file)
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t.Fatalf("failed assertion at %s:%d: %s - %s\n", fname, line, s, err)
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}
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}
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func TestMain(m *testing.M) {
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os.Exit(protest.RunTestsWithFixtures(m))
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}
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func withTestClient(name string, t *testing.T, fn func(c service.Client)) {
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listener, err := net.Listen("tcp", "localhost:0")
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if err != nil {
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t.Fatalf("couldn't start listener: %s\n", err)
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}
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defer listener.Close()
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server := rpc.NewServer(&service.Config{
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Listener: listener,
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ProcessArgs: []string{protest.BuildFixture(name).Path},
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}, false)
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if err := server.Run(); err != nil {
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t.Fatal(err)
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}
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client := rpc.NewClient(listener.Addr().String())
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defer func() {
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client.Detach(true)
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}()
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fn(client)
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}
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func TestRunWithInvalidPath(t *testing.T) {
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listener, err := net.Listen("tcp", "localhost:0")
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if err != nil {
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t.Fatalf("couldn't start listener: %s\n", err)
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}
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defer listener.Close()
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server := rpc.NewServer(&service.Config{
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Listener: listener,
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ProcessArgs: []string{"invalid_path"},
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}, false)
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if err := server.Run(); err == nil {
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t.Fatal("Expected Run to return error for invalid program path")
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}
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}
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func TestRestart_afterExit(t *testing.T) {
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withTestClient("continuetestprog", t, func(c service.Client) {
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origPid := c.ProcessPid()
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state := <-c.Continue()
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if !state.Exited {
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t.Fatal("expected initial process to have exited")
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}
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if err := c.Restart(); err != nil {
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t.Fatal(err)
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}
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if c.ProcessPid() == origPid {
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t.Fatal("did not spawn new process, has same PID")
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}
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state = <-c.Continue()
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if !state.Exited {
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t.Fatalf("expected restarted process to have exited %v", state)
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}
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})
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}
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func TestRestart_duringStop(t *testing.T) {
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withTestClient("continuetestprog", t, func(c service.Client) {
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origPid := c.ProcessPid()
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_, err := c.CreateBreakpoint(&api.Breakpoint{FunctionName: "main.main", Line: 1})
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if err != nil {
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t.Fatal(err)
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}
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state := <-c.Continue()
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if state.Breakpoint == nil {
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t.Fatal("did not hit breakpoint")
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}
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if err := c.Restart(); err != nil {
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t.Fatal(err)
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}
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if c.ProcessPid() == origPid {
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t.Fatal("did not spawn new process, has same PID")
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}
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bps, err := c.ListBreakpoints()
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if err != nil {
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t.Fatal(err)
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}
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if len(bps) == 0 {
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t.Fatal("breakpoints not preserved")
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}
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})
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}
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func TestRestart_attachPid(t *testing.T) {
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// Assert it does not work and returns error.
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// We cannot restart a process we did not spawn.
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server := rpc.NewServer(&service.Config{
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Listener: nil,
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AttachPid: 999,
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}, false)
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if err := server.Restart(nil, nil); err == nil {
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t.Fatal("expected error on restart after attaching to pid but got none")
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}
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}
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func TestClientServer_exit(t *testing.T) {
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withTestClient("continuetestprog", t, func(c service.Client) {
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state, err := c.GetState()
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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if e, a := false, state.Exited; e != a {
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t.Fatalf("Expected exited %v, got %v", e, a)
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}
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state = <-c.Continue()
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if state.Err == nil {
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t.Fatalf("Error expected after continue")
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}
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if !state.Exited {
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t.Fatalf("Expected exit after continue: %v", state)
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}
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state, err = c.GetState()
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if err == nil {
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t.Fatal("Expected error on querying state from exited process")
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}
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})
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}
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func TestClientServer_step(t *testing.T) {
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withTestClient("testprog", t, func(c service.Client) {
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_, err := c.CreateBreakpoint(&api.Breakpoint{FunctionName: "main.helloworld", Line: 1})
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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stateBefore := <-c.Continue()
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if stateBefore.Err != nil {
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t.Fatalf("Unexpected error: %v", stateBefore.Err)
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}
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stateAfter, err := c.Step()
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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if before, after := stateBefore.CurrentThread.PC, stateAfter.CurrentThread.PC; before >= after {
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t.Errorf("Expected %#v to be greater than %#v", before, after)
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}
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})
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}
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type nextTest struct {
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begin, end int
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}
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func testnext(testcases []nextTest, initialLocation string, t *testing.T) {
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withTestClient("testnextprog", t, func(c service.Client) {
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bp, err := c.CreateBreakpoint(&api.Breakpoint{FunctionName: initialLocation, Line: -1})
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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state := <-c.Continue()
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if state.Err != nil {
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t.Fatalf("Unexpected error: %v", state.Err)
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}
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_, err = c.ClearBreakpoint(bp.ID)
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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for _, tc := range testcases {
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if state.CurrentThread.Line != tc.begin {
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t.Fatalf("Program not stopped at correct spot expected %d was %d", tc.begin, state.CurrentThread.Line)
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}
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t.Logf("Next for scenario %#v", tc)
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state, err = c.Next()
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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if state.CurrentThread.Line != tc.end {
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t.Fatalf("Program did not continue to correct next location expected %d was %d", tc.end, state.CurrentThread.Line)
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}
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}
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})
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}
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func TestNextGeneral(t *testing.T) {
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testcases := []nextTest{
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{19, 20},
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{20, 23},
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{23, 24},
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{24, 26},
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{26, 31},
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{31, 23},
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{23, 24},
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{24, 26},
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{26, 31},
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{31, 23},
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{23, 24},
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{24, 26},
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{26, 27},
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{27, 34},
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}
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testnext(testcases, "main.testnext", t)
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}
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func TestNextFunctionReturn(t *testing.T) {
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testcases := []nextTest{
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{14, 15},
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{15, 35},
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}
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testnext(testcases, "main.helloworld", t)
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}
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func TestClientServer_breakpointInMainThread(t *testing.T) {
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withTestClient("testprog", t, func(c service.Client) {
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bp, err := c.CreateBreakpoint(&api.Breakpoint{FunctionName: "main.helloworld", Line: 1})
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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state := <-c.Continue()
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if err != nil {
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t.Fatalf("Unexpected error: %v, state: %#v", err, state)
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}
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pc := state.CurrentThread.PC
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if pc-1 != bp.Addr && pc != bp.Addr {
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f, l := state.CurrentThread.File, state.CurrentThread.Line
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t.Fatalf("Break not respected:\nPC:%#v %s:%d\nFN:%#v \n", pc, f, l, bp.Addr)
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}
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})
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}
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func TestClientServer_breakpointInSeparateGoroutine(t *testing.T) {
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withTestClient("testthreads", t, func(c service.Client) {
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_, err := c.CreateBreakpoint(&api.Breakpoint{FunctionName: "main.anotherthread", Line: 1})
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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state := <-c.Continue()
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if state.Err != nil {
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t.Fatalf("Unexpected error: %v, state: %#v", state.Err, state)
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}
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f, l := state.CurrentThread.File, state.CurrentThread.Line
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if f != "testthreads.go" && l != 9 {
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t.Fatal("Program did not hit breakpoint")
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}
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})
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}
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func TestClientServer_breakAtNonexistentPoint(t *testing.T) {
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withTestClient("testprog", t, func(c service.Client) {
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_, err := c.CreateBreakpoint(&api.Breakpoint{FunctionName: "nowhere", Line: 1})
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if err == nil {
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t.Fatal("Should not be able to break at non existent function")
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}
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})
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}
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func TestClientServer_clearBreakpoint(t *testing.T) {
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withTestClient("testprog", t, func(c service.Client) {
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bp, err := c.CreateBreakpoint(&api.Breakpoint{FunctionName: "main.sleepytime", Line: 1})
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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bps, err := c.ListBreakpoints()
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if e, a := 1, len(bps); e != a {
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t.Fatalf("Expected breakpoint count %d, got %d", e, a)
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}
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deleted, err := c.ClearBreakpoint(bp.ID)
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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if deleted.ID != bp.ID {
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t.Fatalf("Expected deleted breakpoint ID %v, got %v", bp.ID, deleted.ID)
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}
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bps, err = c.ListBreakpoints()
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if e, a := 0, len(bps); e != a {
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t.Fatalf("Expected breakpoint count %d, got %d", e, a)
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}
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})
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}
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func TestClientServer_switchThread(t *testing.T) {
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withTestClient("testnextprog", t, func(c service.Client) {
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// With invalid thread id
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_, err := c.SwitchThread(-1)
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if err == nil {
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t.Fatal("Expected error for invalid thread id")
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}
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_, err = c.CreateBreakpoint(&api.Breakpoint{FunctionName: "main.main", Line: 1})
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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state := <-c.Continue()
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if state.Err != nil {
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t.Fatalf("Unexpected error: %v, state: %#v", state.Err, state)
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}
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var nt int
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ct := state.CurrentThread.ID
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threads, err := c.ListThreads()
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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for _, th := range threads {
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if th.ID != ct {
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nt = th.ID
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break
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}
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}
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if nt == 0 {
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t.Fatal("could not find thread to switch to")
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}
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// With valid thread id
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state, err = c.SwitchThread(nt)
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if err != nil {
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t.Fatal(err)
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}
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if state.CurrentThread.ID != nt {
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t.Fatal("Did not switch threads")
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}
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})
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}
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func testProgPath(t *testing.T, name string) string {
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fp, err := filepath.Abs(fmt.Sprintf("_fixtures/%s.go", name))
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if err != nil {
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t.Fatal(err)
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}
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if _, err := os.Stat(fp); err != nil {
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fp, err = filepath.Abs(fmt.Sprintf("../../_fixtures/%s.go", name))
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if err != nil {
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t.Fatal(err)
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}
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}
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return fp
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}
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func TestClientServer_infoLocals(t *testing.T) {
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withTestClient("testnextprog", t, func(c service.Client) {
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fp := testProgPath(t, "testnextprog")
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_, err := c.CreateBreakpoint(&api.Breakpoint{File: fp, Line: 23})
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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state := <-c.Continue()
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if state.Err != nil {
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t.Fatalf("Unexpected error: %v, state: %#v", state.Err, state)
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}
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locals, err := c.ListLocalVariables(api.EvalScope{-1, 0})
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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if len(locals) != 3 {
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t.Fatalf("Expected 3 locals, got %d %#v", len(locals), locals)
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}
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})
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}
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func TestClientServer_infoArgs(t *testing.T) {
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withTestClient("testnextprog", t, func(c service.Client) {
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fp := testProgPath(t, "testnextprog")
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_, err := c.CreateBreakpoint(&api.Breakpoint{File: fp, Line: 47})
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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state := <-c.Continue()
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if state.Err != nil {
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t.Fatalf("Unexpected error: %v, state: %#v", state.Err, state)
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}
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regs, err := c.ListRegisters()
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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if regs == "" {
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t.Fatal("Expected string showing registers values, got empty string")
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}
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locals, err := c.ListFunctionArgs(api.EvalScope{-1, 0})
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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if len(locals) != 2 {
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t.Fatalf("Expected 2 function args, got %d %#v", len(locals), locals)
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}
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})
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}
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func TestClientServer_traceContinue(t *testing.T) {
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withTestClient("integrationprog", t, func(c service.Client) {
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fp := testProgPath(t, "integrationprog")
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_, err := c.CreateBreakpoint(&api.Breakpoint{File: fp, Line: 15, Tracepoint: true, Goroutine: true, Stacktrace: 5, Variables: []string{"i"}})
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if err != nil {
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t.Fatalf("Unexpected error: %v\n", err)
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}
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count := 0
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contChan := c.Continue()
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for state := range contChan {
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if state.Breakpoint != nil {
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count++
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t.Logf("%v", state)
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bpi := state.BreakpointInfo
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if bpi.Goroutine == nil {
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t.Fatalf("No goroutine information")
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}
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if len(bpi.Stacktrace) <= 0 {
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t.Fatalf("No stacktrace\n")
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}
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if len(bpi.Variables) != 1 {
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t.Fatalf("Wrong number of variables returned: %d", len(bpi.Variables))
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}
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if bpi.Variables[0].Name != "i" {
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t.Fatalf("Wrong variable returned %s", bpi.Variables[0].Name)
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}
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if bpi.Variables[0].Value != strconv.Itoa(count-1) {
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t.Fatalf("Wrong variable value %s (%d)", bpi.Variables[0].Value, count)
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}
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}
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if state.Exited {
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continue
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}
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t.Logf("%v", state)
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if state.Err != nil {
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t.Fatalf("Unexpected error during continue: %v\n", state.Err)
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}
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}
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if count != 3 {
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t.Fatalf("Wrong number of continues hit: %d\n", count)
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}
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})
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}
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func TestClientServer_traceContinue2(t *testing.T) {
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withTestClient("integrationprog", t, func(c service.Client) {
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bp1, err := c.CreateBreakpoint(&api.Breakpoint{FunctionName: "main.main", Line: 1, Tracepoint: true})
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if err != nil {
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t.Fatalf("Unexpected error: %v\n", err)
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}
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bp2, err := c.CreateBreakpoint(&api.Breakpoint{FunctionName: "main.sayhi", Line: 1, Tracepoint: true})
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if err != nil {
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t.Fatalf("Unexpected error: %v\n", err)
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}
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countMain := 0
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countSayhi := 0
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contChan := c.Continue()
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for state := range contChan {
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if state.Breakpoint != nil {
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switch state.Breakpoint.ID {
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case bp1.ID:
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countMain++
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case bp2.ID:
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countSayhi++
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}
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t.Logf("%v", state)
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}
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if state.Exited {
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continue
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}
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if state.Err != nil {
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t.Fatalf("Unexpected error during continue: %v\n", state.Err)
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}
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}
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if countMain != 1 {
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t.Fatalf("Wrong number of continues (main.main) hit: %d\n", countMain)
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}
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if countSayhi != 3 {
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t.Fatalf("Wrong number of continues (main.sayhi) hit: %d\n", countSayhi)
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}
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})
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}
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func findLocationHelper(t *testing.T, c service.Client, loc string, shouldErr bool, count int, checkAddr uint64) []uint64 {
|
|
locs, err := c.FindLocation(api.EvalScope{-1, 0}, loc)
|
|
t.Logf("FindLocation(\"%s\") → %v\n", loc, locs)
|
|
|
|
if shouldErr {
|
|
if err == nil {
|
|
t.Fatalf("Resolving location <%s> didn't return an error: %v", loc, locs)
|
|
}
|
|
} else {
|
|
if err != nil {
|
|
t.Fatalf("Error resolving location <%s>: %v", loc, err)
|
|
}
|
|
}
|
|
|
|
if (count >= 0) && (len(locs) != count) {
|
|
t.Fatalf("Wrong number of breakpoints returned for location <%s> (got %d, expected %d)", loc, len(locs), count)
|
|
}
|
|
|
|
if checkAddr != 0 && checkAddr != locs[0].PC {
|
|
t.Fatalf("Wrong address returned for location <%s> (got %v, epected %v)", loc, locs[0].PC, checkAddr)
|
|
}
|
|
|
|
addrs := make([]uint64, len(locs))
|
|
for i := range locs {
|
|
addrs[i] = locs[i].PC
|
|
}
|
|
return addrs
|
|
}
|
|
|
|
func TestClientServer_FindLocations(t *testing.T) {
|
|
withTestClient("locationsprog", t, func(c service.Client) {
|
|
someFunctionCallAddr := findLocationHelper(t, c, "locationsprog.go:27", false, 1, 0)[0]
|
|
findLocationHelper(t, c, "anotherFunction:1", false, 1, someFunctionCallAddr)
|
|
findLocationHelper(t, c, "main.anotherFunction:1", false, 1, someFunctionCallAddr)
|
|
findLocationHelper(t, c, "anotherFunction", false, 1, someFunctionCallAddr)
|
|
findLocationHelper(t, c, "main.anotherFunction", false, 1, someFunctionCallAddr)
|
|
findLocationHelper(t, c, fmt.Sprintf("*0x%x", someFunctionCallAddr), false, 1, someFunctionCallAddr)
|
|
findLocationHelper(t, c, "sprog.go:26", true, 0, 0)
|
|
|
|
findLocationHelper(t, c, "String", true, 0, 0)
|
|
findLocationHelper(t, c, "main.String", true, 0, 0)
|
|
|
|
someTypeStringFuncAddr := findLocationHelper(t, c, "locationsprog.go:15", false, 1, 0)[0]
|
|
otherTypeStringFuncAddr := findLocationHelper(t, c, "locationsprog.go:19", false, 1, 0)[0]
|
|
findLocationHelper(t, c, "SomeType.String", false, 1, someTypeStringFuncAddr)
|
|
findLocationHelper(t, c, "(*SomeType).String", false, 1, someTypeStringFuncAddr)
|
|
findLocationHelper(t, c, "main.SomeType.String", false, 1, someTypeStringFuncAddr)
|
|
findLocationHelper(t, c, "main.(*SomeType).String", false, 1, someTypeStringFuncAddr)
|
|
|
|
// Issue #275
|
|
findLocationHelper(t, c, "io/ioutil.ReadFile", false, 1, 0)
|
|
|
|
stringAddrs := findLocationHelper(t, c, "/^main.*Type.*String$/", false, 2, 0)
|
|
|
|
if otherTypeStringFuncAddr != stringAddrs[0] && otherTypeStringFuncAddr != stringAddrs[1] {
|
|
t.Fatalf("Wrong locations returned for \"/.*Type.*String/\", got: %v expected: %v and %v\n", stringAddrs, someTypeStringFuncAddr, otherTypeStringFuncAddr)
|
|
}
|
|
|
|
_, err := c.CreateBreakpoint(&api.Breakpoint{FunctionName: "main.main", Line: 3, Tracepoint: false})
|
|
if err != nil {
|
|
t.Fatalf("CreateBreakpoint(): %v\n", err)
|
|
}
|
|
|
|
<-c.Continue()
|
|
|
|
locationsprog34Addr := findLocationHelper(t, c, "locationsprog.go:34", false, 1, 0)[0]
|
|
findLocationHelper(t, c, fmt.Sprintf("%s:34", testProgPath(t, "locationsprog")), false, 1, locationsprog34Addr)
|
|
findLocationHelper(t, c, "+1", false, 1, locationsprog34Addr)
|
|
findLocationHelper(t, c, "34", false, 1, locationsprog34Addr)
|
|
findLocationHelper(t, c, "-1", false, 1, findLocationHelper(t, c, "locationsprog.go:32", false, 1, 0)[0])
|
|
})
|
|
|
|
withTestClient("testnextdefer", t, func(c service.Client) {
|
|
firstMainLine := findLocationHelper(t, c, "testnextdefer.go:8", false, 1, 0)[0]
|
|
findLocationHelper(t, c, "main.main", false, 1, firstMainLine)
|
|
})
|
|
|
|
withTestClient("stacktraceprog", t, func(c service.Client) {
|
|
stacktracemeAddr := findLocationHelper(t, c, "stacktraceprog.go:4", false, 1, 0)[0]
|
|
findLocationHelper(t, c, "main.stacktraceme", false, 1, stacktracemeAddr)
|
|
})
|
|
}
|
|
|
|
func TestClientServer_EvalVariable(t *testing.T) {
|
|
withTestClient("testvariables", t, func(c service.Client) {
|
|
fp := testProgPath(t, "testvariables")
|
|
_, err := c.CreateBreakpoint(&api.Breakpoint{File: fp, Line: 59})
|
|
assertNoError(err, t, "CreateBreakpoint()")
|
|
|
|
state := <-c.Continue()
|
|
|
|
if state.Err != nil {
|
|
t.Fatalf("Continue(): %v\n", state.Err)
|
|
}
|
|
|
|
var1, err := c.EvalVariable(api.EvalScope{-1, 0}, "a1")
|
|
assertNoError(err, t, "EvalVariable")
|
|
|
|
t.Logf("var1: <%s>", var1.Value)
|
|
|
|
if var1.Value != "foofoofoofoofoofoo" {
|
|
t.Fatalf("Wrong variable value: %v", var1.Value)
|
|
}
|
|
})
|
|
}
|
|
|
|
func TestClientServer_SetVariable(t *testing.T) {
|
|
withTestClient("testvariables", t, func(c service.Client) {
|
|
fp := testProgPath(t, "testvariables")
|
|
_, err := c.CreateBreakpoint(&api.Breakpoint{File: fp, Line: 59})
|
|
assertNoError(err, t, "CreateBreakpoint()")
|
|
|
|
state := <-c.Continue()
|
|
|
|
if state.Err != nil {
|
|
t.Fatalf("Continue(): %v\n", state.Err)
|
|
}
|
|
|
|
assertNoError(c.SetVariable(api.EvalScope{-1, 0}, "a2", "8"), t, "SetVariable()")
|
|
|
|
a2, err := c.EvalVariable(api.EvalScope{-1, 0}, "a2")
|
|
|
|
t.Logf("a2: <%s>", a2.Value)
|
|
|
|
if a2.Value != "8" {
|
|
t.Fatalf("Wrong variable value: %v", a2.Value)
|
|
}
|
|
})
|
|
}
|
|
|
|
func TestClientServer_FullStacktrace(t *testing.T) {
|
|
withTestClient("goroutinestackprog", t, func(c service.Client) {
|
|
_, err := c.CreateBreakpoint(&api.Breakpoint{FunctionName: "main.stacktraceme", Line: -1})
|
|
assertNoError(err, t, "CreateBreakpoint()")
|
|
state := <-c.Continue()
|
|
if state.Err != nil {
|
|
t.Fatalf("Continue(): %v\n", state.Err)
|
|
}
|
|
|
|
gs, err := c.ListGoroutines()
|
|
assertNoError(err, t, "GoroutinesInfo()")
|
|
found := make([]bool, 10)
|
|
for _, g := range gs {
|
|
frames, err := c.Stacktrace(g.ID, 10, true)
|
|
assertNoError(err, t, fmt.Sprintf("Stacktrace(%d)", g.ID))
|
|
for i, frame := range frames {
|
|
if frame.Function == nil {
|
|
continue
|
|
}
|
|
if frame.Function.Name != "main.agoroutine" {
|
|
continue
|
|
}
|
|
t.Logf("frame %d: %v", i, frame)
|
|
for _, arg := range frame.Arguments {
|
|
if arg.Name != "i" {
|
|
continue
|
|
}
|
|
n, err := strconv.Atoi(arg.Value)
|
|
assertNoError(err, t, fmt.Sprintf("Wrong value for i in goroutine %d (%s)", g.ID, arg.Value))
|
|
found[n] = true
|
|
}
|
|
}
|
|
}
|
|
|
|
for i := range found {
|
|
if !found[i] {
|
|
t.Fatalf("Goroutine %d not found", i)
|
|
}
|
|
}
|
|
|
|
state = <-c.Continue()
|
|
if state.Err != nil {
|
|
t.Fatalf("Continue(): %v\n", state.Err)
|
|
}
|
|
|
|
frames, err := c.Stacktrace(-1, 10, true)
|
|
assertNoError(err, t, "Stacktrace")
|
|
|
|
cur := 3
|
|
for i, frame := range frames {
|
|
if i == 0 {
|
|
continue
|
|
}
|
|
t.Logf("frame %d: %v", i, frame)
|
|
v := frame.Var("n")
|
|
if v == nil {
|
|
t.Fatalf("Could not find value of variable n in frame %d", i)
|
|
}
|
|
n, err := strconv.Atoi(v.Value)
|
|
assertNoError(err, t, fmt.Sprintf("Wrong value for n: %s", v.Value))
|
|
if n != cur {
|
|
t.Fatalf("Expected value %d got %d", cur, n)
|
|
}
|
|
cur--
|
|
if cur < 0 {
|
|
break
|
|
}
|
|
}
|
|
})
|
|
}
|