7afda8dbe0
The location specified '<fnname>:0' could be used to set a breakpoint on the entry point of the function (as opposed to locspec '<fnname>' which sets it after the prologue). Setting a breakpoint on an entry point is almost never useful, the way this feature was implemented could cause it to be used accidentally and there are other ways to accomplish the same task (by setting a breakpoint on the PC address directly).
273 lines
8.8 KiB
Go
273 lines
8.8 KiB
Go
package gdbserial_test
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import (
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"flag"
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"fmt"
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"os"
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"os/exec"
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"path/filepath"
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"runtime"
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"testing"
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"github.com/go-delve/delve/pkg/logflags"
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"github.com/go-delve/delve/pkg/proc"
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"github.com/go-delve/delve/pkg/proc/gdbserial"
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protest "github.com/go-delve/delve/pkg/proc/test"
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)
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func TestMain(m *testing.M) {
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var logConf string
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flag.StringVar(&logConf, "log", "", "configures logging")
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flag.Parse()
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logflags.Setup(logConf != "", logConf, "")
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os.Exit(protest.RunTestsWithFixtures(m))
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}
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func withTestRecording(name string, t testing.TB, fn func(p *gdbserial.Process, fixture protest.Fixture)) {
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fixture := protest.BuildFixture(name, 0)
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protest.MustHaveRecordingAllowed(t)
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if path, _ := exec.LookPath("rr"); path == "" {
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t.Skip("test skipped, rr not found")
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}
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t.Log("recording")
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p, tracedir, err := gdbserial.RecordAndReplay([]string{fixture.Path}, ".", true, []string{})
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if err != nil {
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t.Fatal("Launch():", err)
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}
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t.Logf("replaying %q", tracedir)
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defer func() {
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p.Detach(true)
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if tracedir != "" {
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protest.SafeRemoveAll(tracedir)
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}
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}()
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fn(p, fixture)
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}
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func assertNoError(err error, t testing.TB, 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 setFunctionBreakpoint(p proc.Process, t *testing.T, fname string) *proc.Breakpoint {
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addr, err := proc.FindFunctionLocation(p, fname, 0)
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assertNoError(err, t, fmt.Sprintf("FindFunctionLocation(%s)", fname))
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bp, err := p.SetBreakpoint(addr, proc.UserBreakpoint, nil)
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assertNoError(err, t, fmt.Sprintf("SetBreakpoint(%#x) function %s", addr, fname))
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return bp
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}
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func TestRestartAfterExit(t *testing.T) {
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protest.AllowRecording(t)
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withTestRecording("testnextprog", t, func(p *gdbserial.Process, fixture protest.Fixture) {
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setFunctionBreakpoint(p, t, "main.main")
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assertNoError(proc.Continue(p), t, "Continue")
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loc, err := p.CurrentThread().Location()
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assertNoError(err, t, "CurrentThread().Location()")
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err = proc.Continue(p)
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if _, isexited := err.(proc.ErrProcessExited); err == nil || !isexited {
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t.Fatalf("program did not exit: %v", err)
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}
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assertNoError(p.Restart(""), t, "Restart")
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assertNoError(proc.Continue(p), t, "Continue (after restart)")
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loc2, err := p.CurrentThread().Location()
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assertNoError(err, t, "CurrentThread().Location() (after restart)")
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if loc2.Line != loc.Line {
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t.Fatalf("stopped at %d (expected %d)", loc2.Line, loc.Line)
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}
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err = proc.Continue(p)
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if _, isexited := err.(proc.ErrProcessExited); err == nil || !isexited {
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t.Fatalf("program did not exit (after exit): %v", err)
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}
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})
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}
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func TestRestartDuringStop(t *testing.T) {
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protest.AllowRecording(t)
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withTestRecording("testnextprog", t, func(p *gdbserial.Process, fixture protest.Fixture) {
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setFunctionBreakpoint(p, t, "main.main")
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assertNoError(proc.Continue(p), t, "Continue")
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loc, err := p.CurrentThread().Location()
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assertNoError(err, t, "CurrentThread().Location()")
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assertNoError(p.Restart(""), t, "Restart")
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assertNoError(proc.Continue(p), t, "Continue (after restart)")
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loc2, err := p.CurrentThread().Location()
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assertNoError(err, t, "CurrentThread().Location() (after restart)")
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if loc2.Line != loc.Line {
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t.Fatalf("stopped at %d (expected %d)", loc2.Line, loc.Line)
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}
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err = proc.Continue(p)
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if _, isexited := err.(proc.ErrProcessExited); err == nil || !isexited {
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t.Fatalf("program did not exit (after exit): %v", err)
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}
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})
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}
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func setFileBreakpoint(p proc.Process, t *testing.T, file string, line int) *proc.Breakpoint {
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addr, _, err := p.BinInfo().LineToPC(file, line)
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assertNoError(err, t, "LineToPC")
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bp, err := p.SetBreakpoint(addr, proc.UserBreakpoint, nil)
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assertNoError(err, t, fmt.Sprintf("SetBreakpoint(%#x) - %s:%d", addr, file, line))
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return bp
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}
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func TestReverseBreakpointCounts(t *testing.T) {
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protest.AllowRecording(t)
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withTestRecording("bpcountstest", t, func(p *gdbserial.Process, fixture protest.Fixture) {
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endbp := setFileBreakpoint(p, t, fixture.Source, 28)
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assertNoError(proc.Continue(p), t, "Continue()")
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loc, _ := p.CurrentThread().Location()
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if loc.PC != endbp.Addr {
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t.Fatalf("did not reach end of main.main function: %s:%d (%#x)", loc.File, loc.Line, loc.PC)
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}
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p.ClearBreakpoint(endbp.Addr)
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assertNoError(p.Direction(proc.Backward), t, "Switching to backward direction")
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bp := setFileBreakpoint(p, t, fixture.Source, 12)
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startbp := setFileBreakpoint(p, t, fixture.Source, 20)
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countLoop:
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for {
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assertNoError(proc.Continue(p), t, "Continue()")
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loc, _ := p.CurrentThread().Location()
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switch loc.PC {
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case startbp.Addr:
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break countLoop
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case bp.Addr:
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// ok
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default:
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t.Fatalf("unexpected stop location %s:%d %#x", loc.File, loc.Line, loc.PC)
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}
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}
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t.Logf("TotalHitCount: %d", bp.TotalHitCount)
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if bp.TotalHitCount != 200 {
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t.Fatalf("Wrong TotalHitCount for the breakpoint (%d)", bp.TotalHitCount)
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}
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if len(bp.HitCount) != 2 {
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t.Fatalf("Wrong number of goroutines for breakpoint (%d)", len(bp.HitCount))
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}
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for _, v := range bp.HitCount {
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if v != 100 {
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t.Fatalf("Wrong HitCount for breakpoint (%v)", bp.HitCount)
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}
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}
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})
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}
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func getPosition(p *gdbserial.Process, t *testing.T) (when string, loc *proc.Location) {
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var err error
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when, err = p.When()
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assertNoError(err, t, "When")
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loc, err = p.CurrentThread().Location()
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assertNoError(err, t, "Location")
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return
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}
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func TestCheckpoints(t *testing.T) {
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protest.AllowRecording(t)
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withTestRecording("continuetestprog", t, func(p *gdbserial.Process, fixture protest.Fixture) {
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// Continues until start of main.main, record output of 'when'
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bp := setFunctionBreakpoint(p, t, "main.main")
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assertNoError(proc.Continue(p), t, "Continue")
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when0, loc0 := getPosition(p, t)
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t.Logf("when0: %q (%#x)", when0, loc0.PC)
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// Create a checkpoint and check that the list of checkpoints reflects this
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cpid, err := p.Checkpoint("checkpoint1")
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if cpid != 1 {
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t.Errorf("unexpected checkpoint id %d", cpid)
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}
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assertNoError(err, t, "Checkpoint")
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checkpoints, err := p.Checkpoints()
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assertNoError(err, t, "Checkpoints")
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if len(checkpoints) != 1 {
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t.Fatalf("wrong number of checkpoints %v (one expected)", checkpoints)
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}
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// Move forward with next, check that the output of 'when' changes
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assertNoError(proc.Next(p), t, "First Next")
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assertNoError(proc.Next(p), t, "Second Next")
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when1, loc1 := getPosition(p, t)
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t.Logf("when1: %q (%#x)", when1, loc1.PC)
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if loc0.PC == loc1.PC {
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t.Fatalf("next did not move process %#x", loc0.PC)
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}
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if when0 == when1 {
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t.Fatalf("output of when did not change after next: %q", when0)
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}
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// Move back to checkpoint, check that the output of 'when' is the same as
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// what it was when we set the breakpoint
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p.Restart(fmt.Sprintf("c%d", cpid))
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when2, loc2 := getPosition(p, t)
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t.Logf("when2: %q (%#x)", when2, loc2.PC)
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if loc2.PC != loc0.PC {
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t.Fatalf("PC address mismatch %#x != %#x", loc0.PC, loc2.PC)
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}
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if when0 != when2 {
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t.Fatalf("output of when mismatched %q != %q", when0, when2)
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}
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// Move forward with next again, check that the output of 'when' matches
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assertNoError(proc.Next(p), t, "First Next")
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assertNoError(proc.Next(p), t, "Second Next")
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when3, loc3 := getPosition(p, t)
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t.Logf("when3: %q (%#x)", when3, loc3.PC)
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if loc3.PC != loc1.PC {
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t.Fatalf("PC address mismatch %#x != %#x", loc1.PC, loc3.PC)
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}
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if when3 != when1 {
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t.Fatalf("when output mismatch %q != %q", when1, when3)
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}
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// Delete breakpoint, move back to checkpoint then next twice and check
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// output of 'when' again
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_, err = p.ClearBreakpoint(bp.Addr)
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assertNoError(err, t, "ClearBreakpoint")
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p.Restart(fmt.Sprintf("c%d", cpid))
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assertNoError(proc.Next(p), t, "First Next")
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assertNoError(proc.Next(p), t, "Second Next")
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when4, loc4 := getPosition(p, t)
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t.Logf("when4: %q (%#x)", when4, loc4.PC)
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if loc4.PC != loc1.PC {
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t.Fatalf("PC address mismatch %#x != %#x", loc1.PC, loc4.PC)
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}
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if when4 != when1 {
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t.Fatalf("when output mismatch %q != %q", when1, when4)
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}
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// Delete checkpoint, check that the list of checkpoints is updated
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assertNoError(p.ClearCheckpoint(cpid), t, "ClearCheckpoint")
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checkpoints, err = p.Checkpoints()
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assertNoError(err, t, "Checkpoints")
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if len(checkpoints) != 0 {
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t.Fatalf("wrong number of checkpoints %v (zero expected)", checkpoints)
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}
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})
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}
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func TestIssue1376(t *testing.T) {
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// Backward Continue should terminate when it encounters the start of the process.
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protest.AllowRecording(t)
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withTestRecording("continuetestprog", t, func(p *gdbserial.Process, fixture protest.Fixture) {
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bp := setFunctionBreakpoint(p, t, "main.main")
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assertNoError(proc.Continue(p), t, "Continue (forward)")
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_, err := p.ClearBreakpoint(bp.Addr)
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assertNoError(err, t, "ClearBreakpoint")
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assertNoError(p.Direction(proc.Backward), t, "Switching to backward direction")
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assertNoError(proc.Continue(p), t, "Continue (backward)")
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})
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}
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