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pkg/proc,service/debugger: do not disable unsatisfiable breakpoints (#3868)

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Previously breakpoints with hitcount conditions that became
unsatisfiable
would become disabled, this was done as an optimization so that the
continue loop would no longer need to stop on them and evaluate their
conditions.
As a side effect this meant that on restart these breakpoints would
remain disabled, even though their hit condition returned satisfiable.

This commit changes Delve behavior so that breakpoints with
unsatisifiable hitcount conditions are no longer disabled but the
associated physical breakpoints are removed anyway, preserving the
optimization.

Some refactoring is done to the way conditions are represented and the
enable status is managed so that in the future it will be possible to
use hitcount conditions to implement "chained" breakpoints (also known
as dependet breakpoints), i.e. breakpoints that become active only
after a second breakpoint has been hit.
This commit is contained in:
Alessandro Arzilli 2024-12-05 04:07:56 +01:00 committed by GitHub
parent 7b9a379e59
commit d97b471292
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
8 changed files with 265 additions and 240 deletions
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72
pkg/proc/breakpoints.go
View File

@ -1,12 +1,14 @@
package proc
import (
"bytes"
"debug/dwarf"
"errors"
"fmt"
"go/ast"
"go/constant"
"go/parser"
"go/printer"
"go/token"
"reflect"
@ -211,7 +213,7 @@ func (bp *Breakpoint) VerboseDescr() []string {
for _, breaklet := range bp.Breaklets {
switch breaklet.Kind {
case UserBreakpoint:
r = append(r, fmt.Sprintf("User Cond=%q HitCond=%v", exprToString(breaklet.Cond), lbp.HitCond))
r = append(r, fmt.Sprintf("User Cond=%q HitCond=%v", exprToString(breaklet.Cond), lbp.hitCond))
case NextBreakpoint:
r = append(r, fmt.Sprintf("Next Cond=%q", exprToString(breaklet.Cond)))
case NextDeferBreakpoint:
@ -360,7 +362,7 @@ func (bpstate *BreakpointState) checkCond(tgt *Target, breaklet *Breaklet, threa
// checkHitCond evaluates bp's hit condition on thread.
func checkHitCond(lbp *LogicalBreakpoint, goroutineID int64) bool {
if lbp == nil || lbp.HitCond == nil {
if lbp == nil || lbp.hitCond == nil {
return true
}
hitCount := int(lbp.TotalHitCount)
@ -368,21 +370,21 @@ func checkHitCond(lbp *LogicalBreakpoint, goroutineID int64) bool {
hitCount = int(lbp.HitCount[goroutineID])
}
// Evaluate the breakpoint condition.
switch lbp.HitCond.Op {
switch lbp.hitCond.Op {
case token.EQL:
return hitCount == lbp.HitCond.Val
return hitCount == lbp.hitCond.Val
case token.NEQ:
return hitCount != lbp.HitCond.Val
return hitCount != lbp.hitCond.Val
case token.GTR:
return hitCount > lbp.HitCond.Val
return hitCount > lbp.hitCond.Val
case token.LSS:
return hitCount < lbp.HitCond.Val
return hitCount < lbp.hitCond.Val
case token.GEQ:
return hitCount >= lbp.HitCond.Val
return hitCount >= lbp.hitCond.Val
case token.LEQ:
return hitCount <= lbp.HitCond.Val
return hitCount <= lbp.hitCond.Val
case token.REM:
return hitCount%lbp.HitCond.Val == 0
return hitCount%lbp.hitCond.Val == 0
}
return false
}
@ -699,13 +701,14 @@ func (t *Target) setBreakpointInternal(logicalID int, addr uint64, kind Breakpoi
if lbp == nil {
lbp = &LogicalBreakpoint{LogicalID: logicalID}
lbp.HitCount = make(map[int64]uint64)
lbp.Enabled = true
lbp.enabled = true
lbp.condSatisfiable = true
bpmap.Logical[logicalID] = lbp
}
bp.Logical = lbp
breaklet := bp.UserBreaklet()
if breaklet != nil && breaklet.Cond == nil {
breaklet.Cond = lbp.Cond
breaklet.Cond = lbp.cond
}
if lbp.File == "" && lbp.Line == 0 {
lbp.File = bp.File
@ -1032,7 +1035,7 @@ type LogicalBreakpoint struct {
FunctionName string
File string
Line int
Enabled bool
enabled bool
Set SetBreakpoint
@ -1048,15 +1051,18 @@ type LogicalBreakpoint struct {
TotalHitCount uint64 // Number of times a breakpoint has been reached
HitCondPerG bool // Use per goroutine hitcount as HitCond operand, instead of total hitcount
// HitCond: if not nil the breakpoint will be triggered only if the evaluated HitCond returns
// hitCond: if not nil the breakpoint will be triggered only if the evaluated HitCond returns
// true with the TotalHitCount.
HitCond *struct {
hitCond *struct {
Op token.Token
Val int
}
// Cond: if not nil the breakpoint will be triggered only if evaluating Cond returns true
Cond ast.Expr
// cond: if not nil the breakpoint will be triggered only if evaluating Cond returns true
cond ast.Expr
// condSatisfiable is true when 'cond && hitCond' can potentially be true.
condSatisfiable bool
UserData interface{} // Any additional information about the breakpoint
// Name of root function from where tracing needs to be done
@ -1079,3 +1085,35 @@ type PidAddr struct {
Pid int
Addr uint64
}
// Enabled returns true if the breakpoint is enabled.
func (lbp *LogicalBreakpoint) Enabled() bool {
return lbp.enabled
}
// HitCond returns the hit condition.
func (lbp *LogicalBreakpoint) HitCond() string {
if lbp.hitCond == nil {
return ""
}
return fmt.Sprintf("%s %d", lbp.hitCond.Op.String(), lbp.hitCond.Val)
}
func (lbp *LogicalBreakpoint) Cond() string {
var buf bytes.Buffer
printer.Fprint(&buf, token.NewFileSet(), lbp.cond)
return buf.String()
}
func breakpointConditionSatisfiable(lbp *LogicalBreakpoint) bool {
if lbp.hitCond == nil || lbp.HitCondPerG {
return true
}
switch lbp.hitCond.Op {
case token.EQL, token.LEQ:
return int(lbp.TotalHitCount) < lbp.hitCond.Val
case token.LSS:
return int(lbp.TotalHitCount) < lbp.hitCond.Val-1
}
return true
}

25
pkg/proc/proc_test.go
View File

@ -1540,10 +1540,7 @@ func TestCondBreakpointError(t *testing.T) {
func TestHitCondBreakpointEQ(t *testing.T) {
withTestProcess("break", t, func(p *proc.Target, grp *proc.TargetGroup, fixture protest.Fixture) {
bp := setFileBreakpoint(p, t, fixture.Source, 7)
bp.Logical.HitCond = &struct {
Op token.Token
Val int
}{token.EQL, 3}
grp.ChangeBreakpointCondition(bp.Logical, "", "== 3", false)
assertNoError(grp.Continue(), t, "Continue()")
ivar := evalVariable(p, t, "i")
@ -1564,10 +1561,7 @@ func TestHitCondBreakpointGEQ(t *testing.T) {
protest.AllowRecording(t)
withTestProcess("break", t, func(p *proc.Target, grp *proc.TargetGroup, fixture protest.Fixture) {
bp := setFileBreakpoint(p, t, fixture.Source, 7)
bp.Logical.HitCond = &struct {
Op token.Token
Val int
}{token.GEQ, 3}
grp.ChangeBreakpointCondition(bp.Logical, "", ">= 3", false)
for it := 3; it <= 10; it++ {
assertNoError(grp.Continue(), t, "Continue()")
@ -1587,10 +1581,7 @@ func TestHitCondBreakpointREM(t *testing.T) {
protest.AllowRecording(t)
withTestProcess("break", t, func(p *proc.Target, grp *proc.TargetGroup, fixture protest.Fixture) {
bp := setFileBreakpoint(p, t, fixture.Source, 7)
bp.Logical.HitCond = &struct {
Op token.Token
Val int
}{token.REM, 2}
grp.ChangeBreakpointCondition(bp.Logical, "", "% 2", false)
for it := 2; it <= 10; it += 2 {
assertNoError(grp.Continue(), t, "Continue()")
@ -5123,8 +5114,9 @@ func TestFollowExec(t *testing.T) {
grp.LogicalBreakpoints[2] = &proc.LogicalBreakpoint{LogicalID: 2, Set: proc.SetBreakpoint{FunctionName: "main.traceme2"}, HitCount: make(map[int64]uint64)}
grp.LogicalBreakpoints[3] = &proc.LogicalBreakpoint{LogicalID: 3, Set: proc.SetBreakpoint{FunctionName: "main.traceme3"}, HitCount: make(map[int64]uint64)}
assertNoError(grp.EnableBreakpoint(grp.LogicalBreakpoints[1]), t, "EnableBreakpoint(main.traceme1)")
assertNoError(grp.EnableBreakpoint(grp.LogicalBreakpoints[3]), t, "EnableBreakpoint(main.traceme3)")
assertNoError(grp.SetBreakpointEnabled(grp.LogicalBreakpoints[1], true), t, "EnableBreakpoint(main.traceme1)")
assertNoError(grp.SetBreakpointEnabled(grp.LogicalBreakpoints[2], true), t, "EnableBreakpoint(main.traceme2)")
assertNoError(grp.SetBreakpointEnabled(grp.LogicalBreakpoints[3], true), t, "EnableBreakpoint(main.traceme3)")
assertNoError(grp.FollowExec(true, ""), t, "FollowExec")
@ -5297,8 +5289,9 @@ func TestFollowExecRegexFilter(t *testing.T) {
grp.LogicalBreakpoints[2] = &proc.LogicalBreakpoint{LogicalID: 2, Set: proc.SetBreakpoint{FunctionName: "main.traceme2"}, HitCount: make(map[int64]uint64)}
grp.LogicalBreakpoints[3] = &proc.LogicalBreakpoint{LogicalID: 3, Set: proc.SetBreakpoint{FunctionName: "main.traceme3"}, HitCount: make(map[int64]uint64)}
assertNoError(grp.EnableBreakpoint(grp.LogicalBreakpoints[1]), t, "EnableBreakpoint(main.traceme1)")
assertNoError(grp.EnableBreakpoint(grp.LogicalBreakpoints[3]), t, "EnableBreakpoint(main.traceme3)")
assertNoError(grp.SetBreakpointEnabled(grp.LogicalBreakpoints[1], true), t, "EnableBreakpoint(main.traceme1)")
assertNoError(grp.SetBreakpointEnabled(grp.LogicalBreakpoints[2], true), t, "EnableBreakpoint(main.traceme2)")
assertNoError(grp.SetBreakpointEnabled(grp.LogicalBreakpoints[3], true), t, "EnableBreakpoint(main.traceme3)")
assertNoError(grp.FollowExec(true, "spawn.* child C1"), t, "FollowExec")

5
pkg/proc/target_exec.go
View File

@ -78,6 +78,11 @@ func (grp *TargetGroup) Continue() error {
}
}()
for {
err := grp.manageUnsatisfiableBreakpoints()
if err != nil {
return err
}
if grp.cctx.CheckAndClearManualStopRequest() {
grp.finishManualStop()
return nil

139
pkg/proc/target_group.go
View File

@ -3,7 +3,10 @@ package proc
import (
"bytes"
"fmt"
"go/parser"
"go/token"
"regexp"
"strconv"
"strings"
"github.com/go-delve/delve/pkg/logflags"
@ -76,8 +79,9 @@ func Restart(grp, oldgrp *TargetGroup, discard func(*LogicalBreakpoint, error))
bp.TotalHitCount = 0
bp.HitCount = make(map[int64]uint64)
bp.Set.PidAddrs = nil // breakpoints set through a list of addresses can not be restored after a restart
if bp.Enabled {
err := grp.EnableBreakpoint(bp)
if bp.enabled {
bp.condSatisfiable = breakpointConditionSatisfiable(bp)
err := grp.enableBreakpoint(bp)
if err != nil {
if discard != nil {
discard(bp, err)
@ -253,8 +257,22 @@ func (grp *TargetGroup) TargetForThread(tid int) *Target {
return nil
}
// EnableBreakpoint re-enables a disabled logical breakpoint.
func (grp *TargetGroup) EnableBreakpoint(lbp *LogicalBreakpoint) error {
// SetBreakpointEnabled either enables or disabled the specified breakpoint based on the value of enabled.
func (grp *TargetGroup) SetBreakpointEnabled(lbp *LogicalBreakpoint, enabled bool) (err error) {
switch {
case lbp.enabled && !enabled:
lbp.enabled = false
err = grp.disableBreakpoint(lbp)
case !lbp.enabled && enabled:
lbp.enabled = true
lbp.condSatisfiable = breakpointConditionSatisfiable(lbp)
err = grp.enableBreakpoint(lbp)
}
return
}
// enableBreakpoint re-enables a disabled logical breakpoint.
func (grp *TargetGroup) enableBreakpoint(lbp *LogicalBreakpoint) error {
var err0, errNotFound, errExists error
didSet := false
targetLoop:
@ -297,11 +315,13 @@ targetLoop:
}
return err0
}
lbp.Enabled = true
return nil
}
func enableBreakpointOnTarget(p *Target, lbp *LogicalBreakpoint) error {
if !lbp.enabled || !lbp.condSatisfiable {
return nil
}
var err error
var addrs []uint64
switch {
@ -338,8 +358,8 @@ func enableBreakpointOnTarget(p *Target, lbp *LogicalBreakpoint) error {
return err
}
// DisableBreakpoint disables a logical breakpoint.
func (grp *TargetGroup) DisableBreakpoint(lbp *LogicalBreakpoint) error {
// disableBreakpoint disables a logical breakpoint.
func (grp *TargetGroup) disableBreakpoint(lbp *LogicalBreakpoint) error {
var errs []error
n := 0
it := ValidTargets{Group: grp}
@ -368,7 +388,110 @@ func (grp *TargetGroup) DisableBreakpoint(lbp *LogicalBreakpoint) error {
}
return fmt.Errorf("unable to clear breakpoint %d (partial): %s", lbp.LogicalID, buf.String())
}
lbp.Enabled = false
return nil
}
// ChangeBreakpointCondition changes the breakpoint condition of lbp.
func (grp *TargetGroup) ChangeBreakpointCondition(lbp *LogicalBreakpoint, cond, hitCond string, hitCondPerG bool) error {
lbp.cond = nil
if cond != "" {
var err error
lbp.cond, err = parser.ParseExpr(cond)
if err != nil {
return err
}
}
t := ValidTargets{Group: grp}
for t.Next() {
for _, bp := range t.Breakpoints().M {
if bp.LogicalID() == lbp.LogicalID {
bp.UserBreaklet().Cond = lbp.cond
}
}
}
lbp.hitCond = nil
if hitCond != "" {
opTok, val, err := parseHitCondition(hitCond)
if err != nil {
return err
}
lbp.hitCond = &struct {
Op token.Token
Val int
}{opTok, val}
lbp.HitCondPerG = hitCondPerG
}
if lbp.enabled {
switch {
case lbp.condSatisfiable && !breakpointConditionSatisfiable(lbp):
lbp.condSatisfiable = false
grp.disableBreakpoint(lbp)
case !lbp.condSatisfiable && breakpointConditionSatisfiable(lbp):
lbp.condSatisfiable = true
grp.enableBreakpoint(lbp)
}
}
return nil
}
func parseHitCondition(hitCond string) (token.Token, int, error) {
// A hit condition can be in the following formats:
// - "number"
// - "OP number"
hitConditionRegex := regexp.MustCompile(`(([=><%!])+|)( |)((\d|_)+)`)
match := hitConditionRegex.FindStringSubmatch(strings.TrimSpace(hitCond))
if match == nil || len(match) != 6 {
return 0, 0, fmt.Errorf("unable to parse breakpoint hit condition: %q\nhit conditions should be of the form \"number\" or \"OP number\"", hitCond)
}
opStr := match[1]
var opTok token.Token
switch opStr {
case "==", "":
opTok = token.EQL
case ">=":
opTok = token.GEQ
case "<=":
opTok = token.LEQ
case ">":
opTok = token.GTR
case "<":
opTok = token.LSS
case "%":
opTok = token.REM
case "!=":
opTok = token.NEQ
default:
return 0, 0, fmt.Errorf("unable to parse breakpoint hit condition: %q\ninvalid operator: %q", hitCond, opStr)
}
numStr := match[4]
val, parseErr := strconv.Atoi(numStr)
if parseErr != nil {
return 0, 0, fmt.Errorf("unable to parse breakpoint hit condition: %q\ninvalid number: %q", hitCond, numStr)
}
return opTok, val, nil
}
// manageUnsatisfiableBreakpoints automatically disables breakpoints with unsatisifiable hit conditions.
func (grp *TargetGroup) manageUnsatisfiableBreakpoints() error {
for _, lbp := range grp.LogicalBreakpoints {
if lbp.enabled {
if lbp.condSatisfiable && !breakpointConditionSatisfiable(lbp) {
lbp.condSatisfiable = false
err := grp.disableBreakpoint(lbp)
if err != nil {
return err
}
}
}
}
return nil
}

1
pkg/terminal/command_test.go
View File

@ -1231,7 +1231,6 @@ func TestHitCondBreakpoint(t *testing.T) {
if !strings.Contains(out, "2\n") {
t.Fatalf("wrong value of j")
}
term.MustExec("toggle bp1")
listIsAt(t, term, "continue", 16, -1, -1)
// second g hit
out = term.MustExec("print j")

13
service/api/conversions.go
View File

@ -1,11 +1,8 @@
package api
import (
"bytes"
"fmt"
"go/constant"
"go/printer"
"go/token"
"reflect"
"sort"
"strconv"
@ -32,7 +29,7 @@ func ConvertLogicalBreakpoint(lbp *proc.LogicalBreakpoint) *Breakpoint {
LoadArgs: LoadConfigFromProc(lbp.LoadArgs),
LoadLocals: LoadConfigFromProc(lbp.LoadLocals),
TotalHitCount: lbp.TotalHitCount,
Disabled: !lbp.Enabled,
Disabled: !lbp.Enabled(),
UserData: lbp.UserData,
RootFuncName: lbp.RootFuncName,
TraceFollowCalls: lbp.TraceFollowCalls,
@ -43,14 +40,10 @@ func ConvertLogicalBreakpoint(lbp *proc.LogicalBreakpoint) *Breakpoint {
b.HitCount[strconv.FormatInt(idx, 10)] = lbp.HitCount[idx]
}
if lbp.HitCond != nil {
b.HitCond = fmt.Sprintf("%s %d", lbp.HitCond.Op.String(), lbp.HitCond.Val)
b.HitCond = lbp.HitCond()
b.HitCondPerG = lbp.HitCondPerG
}
var buf bytes.Buffer
printer.Fprint(&buf, token.NewFileSet(), lbp.Cond)
b.Cond = buf.String()
b.Cond = lbp.Cond()
return b
}

134
service/debugger/debugger.go
View File

@ -7,8 +7,6 @@ import (
"debug/pe"
"errors"
"fmt"
"go/parser"
"go/token"
"io"
"os"
"os/exec"
@ -18,7 +16,6 @@ import (
"runtime"
"slices"
"sort"
"strconv"
"strings"
"sync"
"time"
@ -768,10 +765,10 @@ func (d *Debugger) CreateBreakpoint(requestedBp *api.Breakpoint, locExpr string,
d.breakpointIDCounter = id
}
lbp := &proc.LogicalBreakpoint{LogicalID: id, HitCount: make(map[int64]uint64), Enabled: true}
lbp := &proc.LogicalBreakpoint{LogicalID: id, HitCount: make(map[int64]uint64)}
d.target.LogicalBreakpoints[id] = lbp
err = copyLogicalBreakpointInfo(lbp, requestedBp)
err = d.copyLogicalBreakpointInfo(lbp, requestedBp)
if err != nil {
return nil, err
}
@ -790,7 +787,7 @@ func (d *Debugger) CreateBreakpoint(requestedBp *api.Breakpoint, locExpr string,
}
}
err = d.target.EnableBreakpoint(lbp)
err = d.target.SetBreakpointEnabled(lbp, true)
if err != nil {
if suspended {
logflags.DebuggerLogger().Debugf("could not enable new breakpoint: %v (breakpoint will be suspended)", err)
@ -847,34 +844,18 @@ func (d *Debugger) amendBreakpoint(amend *api.Breakpoint) error {
if original == nil {
return fmt.Errorf("no breakpoint with ID %d", amend.ID)
}
enabledBefore := original.Enabled
err := copyLogicalBreakpointInfo(original, amend)
if err != nil {
return err
}
original.Enabled = !amend.Disabled
switch {
case enabledBefore && !original.Enabled:
if d.isWatchpoint(original) {
if d.isWatchpoint(original) && amend.Disabled {
return errors.New("can not disable watchpoints")
}
err = d.target.DisableBreakpoint(original)
case !enabledBefore && original.Enabled:
err = d.target.EnableBreakpoint(original)
err := d.copyLogicalBreakpointInfo(original, amend)
if err != nil {
return err
}
err = d.target.SetBreakpointEnabled(original, !amend.Disabled)
if err != nil {
return err
}
t := proc.ValidTargets{Group: d.target}
for t.Next() {
for _, bp := range t.Breakpoints().M {
if bp.LogicalID() == amend.ID {
bp.UserBreaklet().Cond = original.Cond
}
}
}
return nil
}
@ -907,7 +888,7 @@ func (d *Debugger) CancelNext() error {
return d.target.ClearSteppingBreakpoints()
}
func copyLogicalBreakpointInfo(lbp *proc.LogicalBreakpoint, requested *api.Breakpoint) error {
func (d *Debugger) copyLogicalBreakpointInfo(lbp *proc.LogicalBreakpoint, requested *api.Breakpoint) error {
lbp.Name = requested.Name
lbp.Tracepoint = requested.Tracepoint
lbp.TraceReturn = requested.TraceReturn
@ -919,70 +900,8 @@ func copyLogicalBreakpointInfo(lbp *proc.LogicalBreakpoint, requested *api.Break
lbp.UserData = requested.UserData
lbp.RootFuncName = requested.RootFuncName
lbp.TraceFollowCalls = requested.TraceFollowCalls
lbp.Cond = nil
if requested.Cond != "" {
var err error
lbp.Cond, err = parser.ParseExpr(requested.Cond)
if err != nil {
return err
}
}
lbp.HitCond = nil
if requested.HitCond != "" {
opTok, val, err := parseHitCondition(requested.HitCond)
if err != nil {
return err
}
lbp.HitCond = &struct {
Op token.Token
Val int
}{opTok, val}
lbp.HitCondPerG = requested.HitCondPerG
}
return nil
}
func parseHitCondition(hitCond string) (token.Token, int, error) {
// A hit condition can be in the following formats:
// - "number"
// - "OP number"
hitConditionRegex := regexp.MustCompile(`(([=><%!])+|)( |)((\d|_)+)`)
match := hitConditionRegex.FindStringSubmatch(strings.TrimSpace(hitCond))
if match == nil || len(match) != 6 {
return 0, 0, fmt.Errorf("unable to parse breakpoint hit condition: %q\nhit conditions should be of the form \"number\" or \"OP number\"", hitCond)
}
opStr := match[1]
var opTok token.Token
switch opStr {
case "==", "":
opTok = token.EQL
case ">=":
opTok = token.GEQ
case "<=":
opTok = token.LEQ
case ">":
opTok = token.GTR
case "<":
opTok = token.LSS
case "%":
opTok = token.REM
case "!=":
opTok = token.NEQ
default:
return 0, 0, fmt.Errorf("unable to parse breakpoint hit condition: %q\ninvalid operator: %q", hitCond, opStr)
}
numStr := match[4]
val, parseErr := strconv.Atoi(numStr)
if parseErr != nil {
return 0, 0, fmt.Errorf("unable to parse breakpoint hit condition: %q\ninvalid number: %q", hitCond, numStr)
}
return opTok, val, nil
return d.target.ChangeBreakpointCondition(lbp, requested.Cond, requested.HitCond, requested.HitCondPerG)
}
// ClearBreakpoint clears a breakpoint.
@ -1000,7 +919,7 @@ func (d *Debugger) ClearBreakpoint(requestedBp *api.Breakpoint) (*api.Breakpoint
lbp := d.target.LogicalBreakpoints[requestedBp.ID]
clearedBp := d.convertBreakpoint(lbp)
err := d.target.DisableBreakpoint(lbp)
err := d.target.SetBreakpointEnabled(lbp, false)
if err != nil {
return nil, err
}
@ -1011,33 +930,6 @@ func (d *Debugger) ClearBreakpoint(requestedBp *api.Breakpoint) (*api.Breakpoint
return clearedBp, nil
}
// isBpHitCondNotSatisfiable returns true if the breakpoint bp has a hit
// condition that is no more satisfiable.
// The hit condition is considered no more satisfiable if it can no longer be
// hit again, for example with {Op: "==", Val: 1} and TotalHitCount == 1.
func isBpHitCondNotSatisfiable(bp *api.Breakpoint) bool {
if bp.HitCond == "" {
return false
}
tok, val, err := parseHitCondition(bp.HitCond)
if err != nil {
return false
}
switch tok {
case token.EQL, token.LEQ:
if int(bp.TotalHitCount) >= val {
return true
}
case token.LSS:
if int(bp.TotalHitCount) >= val-1 {
return true
}
}
return false
}
// Breakpoints returns the list of current breakpoints.
func (d *Debugger) Breakpoints(all bool) []*api.Breakpoint {
d.targetMutex.Lock()
@ -1337,10 +1229,6 @@ func (d *Debugger) Command(command *api.DebuggerCommand, resumeNotify chan struc
}
}
}
if bp := state.CurrentThread.Breakpoint; bp != nil && isBpHitCondNotSatisfiable(bp) {
bp.Disabled = true
d.amendBreakpoint(bp)
}
d.maybePrintUnattendedStopWarning(d.target.Selected.StopReason, state.CurrentThread, clientStatusCh)
return state, err

90
service/test/integration2_test.go
View File

@ -625,18 +625,25 @@ func TestClientServer_disableHitCondLSSBreakpoint(t *testing.T) {
Line: 7,
HitCond: "< 3",
})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
assertNoError(err, t, "CreateBreakpoint")
bp, err := c.CreateBreakpoint(&api.Breakpoint{File: fp, Line: 8})
assertNoError(err, t, "CreateBreakpoint")
if len(bp.Addrs) == 0 {
t.Fatalf("no addresses for breakpoint")
}
continueTo := func(ln int, ival string) {
state := <-c.Continue()
if state.Err != nil {
t.Fatalf("Unexpected error: %v, state: %#v", state.Err, state)
}
assertNoError(state.Err, t, fmt.Sprintf("Unexpected error: %v, state: %#v", state.Err, state))
f, l := state.CurrentThread.File, state.CurrentThread.Line
if f != "break.go" && l != 7 {
t.Fatal("Program did not hit breakpoint")
if f != fp || l != ln {
t.Fatalf("Program did not hit breakpoint %s:%d", f, l)
}
if ival == "" {
return
}
ivar, err := c.EvalVariable(api.EvalScope{GoroutineID: -1}, "i", normalLoadConfig)
@ -644,47 +651,20 @@ func TestClientServer_disableHitCondLSSBreakpoint(t *testing.T) {
t.Logf("ivar: %s", ivar.SinglelineString())
if ivar.Value != "1" {
if ivar.Value != ival {
t.Fatalf("Wrong variable value: %s", ivar.Value)
}
bp, err := c.GetBreakpoint(hitCondBp.ID)
assertNoError(err, t, "GetBreakpoint()")
if bp.Disabled {
t.Fatalf(
"Hit condition %s is still satisfiable but breakpoint has been disabled",
bp.HitCond,
)
}
state = <-c.Continue()
if state.Err != nil {
t.Fatalf("Unexpected error: %v, state: %#v", state.Err, state)
}
f, l = state.CurrentThread.File, state.CurrentThread.Line
if f != "break.go" && l != 7 {
t.Fatal("Program did not hit breakpoint")
}
ivar, err = c.EvalVariable(api.EvalScope{GoroutineID: -1}, "i", normalLoadConfig)
assertNoError(err, t, "EvalVariable")
t.Logf("ivar: %s", ivar.SinglelineString())
if ivar.Value != "2" {
t.Fatalf("Wrong variable value: %s", ivar.Value)
}
continueTo(7, "1")
continueTo(7, "2")
continueTo(8, "")
bp, err = c.GetBreakpoint(hitCondBp.ID)
assertNoError(err, t, "GetBreakpoint()")
if !bp.Disabled {
t.Fatalf(
"Hit condition %s is no more satisfiable but breakpoint has not been disabled",
bp.HitCond,
)
if len(bp.Addrs) != 0 {
t.Fatalf("Hit condition %s is no longer satisfiable but breakpoint has not been disabled", bp.HitCond)
}
})
}
@ -697,17 +677,19 @@ func TestClientServer_disableHitEQLCondBreakpoint(t *testing.T) {
Line: 7,
HitCond: "== 3",
})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
assertNoError(err, t, "CreateBreakpoint")
bp, err := c.CreateBreakpoint(&api.Breakpoint{File: fp, Line: 8})
assertNoError(err, t, "CreateBreakpoint")
if len(bp.Addrs) == 0 {
t.Fatalf("no addresses for breakpoint")
}
state := <-c.Continue()
if state.Err != nil {
t.Fatalf("Unexpected error: %v, state: %#v", state.Err, state)
}
assertNoError(state.Err, t, "Continue")
f, l := state.CurrentThread.File, state.CurrentThread.Line
if f != "break.go" && l != 7 {
if f != fp || l != 7 {
t.Fatal("Program did not hit breakpoint")
}
@ -720,14 +702,18 @@ func TestClientServer_disableHitEQLCondBreakpoint(t *testing.T) {
t.Fatalf("Wrong variable value: %s", ivar.Value)
}
bp, err := c.GetBreakpoint(hitCondBp.ID)
state = <-c.Continue()
assertNoError(state.Err, t, "Continue")
if state.CurrentThread.File != fp || state.CurrentThread.Line != 8 {
t.Fatal("Program did not hit breakpoint")
}
bp, err = c.GetBreakpoint(hitCondBp.ID)
assertNoError(err, t, "GetBreakpoint()")
if !bp.Disabled {
t.Fatalf(
"Hit condition %s is no more satisfiable but breakpoint has not been disabled",
bp.HitCond,
)
if len(bp.Addrs) != 0 {
t.Fatalf("Hit condition %s is no more satisfiable but breakpoint has not been disabled", bp.HitCond)
}
})
}