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main.go
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// Copyright 2016, Gdlv Authors
package main
import (
"bufio"
"bytes"
"fmt"
"image/color"
"io/ioutil"
"math"
"os"
"runtime"
"runtime/pprof"
"strings"
"sync"
"time"
"github.com/aarzilli/gdlv/internal/assets"
"github.com/aarzilli/gdlv/internal/dlvclient/service/api"
"github.com/aarzilli/gdlv/internal/dlvclient/service/rpc2"
"github.com/aarzilli/nucular"
"github.com/aarzilli/nucular/font"
"github.com/aarzilli/nucular/rect"
"github.com/aarzilli/nucular/richtext"
nstyle "github.com/aarzilli/nucular/style"
"golang.org/x/mobile/event/key"
)
//go:generate go-bindata -o internal/assets/assets.go -pkg assets fontawesome-webfont.ttf droid-sans.bold.ttf codicon.ttf
const profileEnabled = false
var zeroWidth, arrowWidth, starWidth, spaceWidth int
var fontInit sync.Once
var iconFace font.Face
var codiconFace font.Face
var boldFace font.Face
var normalFontData []byte
var boldFontData []byte
var iconFontData []byte
var codiconFontData []byte
var (
linkColor = color.RGBA{0x00, 0x88, 0xdd, 0xff}
linkHoverColor = color.RGBA{0x00, 0xaa, 0xff, 0xff}
)
const (
arrowIconChar = "\uf061"
breakpointIconChar = "\uf28d"
interruptIconChar = "\uEAD1"
continueIconChar = "\uEACF"
cancelIconChar = "\uEAD7"
nextIconChar = "\uEAD6"
stepIconChar = "\uEAD4"
stepoutIconChar = "\uEAD5"
)
func setupStyle() {
switch conf.Theme {
default:
fallthrough
case darkTheme:
wnd.SetStyle(nstyle.FromTheme(nstyle.DarkTheme, conf.Scaling))
case whiteTheme:
wnd.SetStyle(nstyle.FromTheme(nstyle.WhiteTheme, conf.Scaling))
case redTheme:
wnd.SetStyle(nstyle.FromTheme(nstyle.RedTheme, conf.Scaling))
case boringTheme:
style := makeBoringStyle()
style.Scale(conf.Scaling)
wnd.SetStyle(style)
}
fontInit.Do(func() {
iconFontData, _ = assets.Asset("fontawesome-webfont.ttf")
codiconFontData, _ = assets.Asset("codicon.ttf")
normalFontPath := os.Getenv("GDLV_NORMAL_FONT")
boldFontPath := os.Getenv("GDLV_BOLD_FONT")
customFonts := false
if normalFontPath != "" && boldFontPath != "" {
_, normerr := os.Stat(normalFontPath)
_, bolderr := os.Stat(boldFontPath)
if normerr == nil && bolderr == nil {
normalFontData, normerr = ioutil.ReadFile(normalFontPath)
boldFontData, bolderr = ioutil.ReadFile(boldFontPath)
if normerr == nil && bolderr == nil {
customFonts = true
}
}
if normerr != nil {
fmt.Fprintf(os.Stderr, "Error opening GDLV_NORMAL_FONT %q: %v\n", normalFontPath, normerr)
}
if bolderr != nil {
fmt.Fprintf(os.Stderr, "Error opening GDLV_BOLD_FONT %q: %v\n", boldFontPath, bolderr)
}
} else if normalFontPath != "" && boldFontPath == "" {
fmt.Fprintf(os.Stderr, "GDLV_NORMAL_FONT set without GDLV_BOLD_FONT\n")
} else if normalFontPath == "" && boldFontPath != "" {
fmt.Fprintf(os.Stderr, "GDLV_BOLD_FONT set without GDLV_NORMAL_FONT\n")
}
if !customFonts {
boldFontData, _ = assets.Asset("droid-sans.bold.ttf")
}
})
style := wnd.Style()
style.Tab.Indent = style.Tab.Padding.X + style.Tab.Spacing.X + nucular.FontHeight(style.Font) + style.GroupWindow.Spacing.X
style.Selectable.Normal.Data.Color = style.NormalWindow.Background
style.GroupWindow.Padding.Y = 0
style.GroupWindow.FooterPadding.Y = 0
style.MenuWindow.FooterPadding.Y = 0
style.ContextualWindow.FooterPadding.Y = 0
zeroWidth = nucular.FontWidth(style.Font, "0")
spaceWidth = nucular.FontWidth(style.Font, " ")
sz := int(12 * conf.Scaling)
var err error
iconFace, err = font.NewFace(iconFontData, sz)
if err != nil {
fmt.Fprintf(os.Stderr, "could not parse icon font: %v\n", err)
os.Exit(1)
}
codiconFace, err = font.NewFace(codiconFontData, sz)
if err != nil {
fmt.Fprintf(os.Stderr, "could not parse codicon font: %v\n", err)
os.Exit(1)
}
boldFace, err = font.NewFace(boldFontData, sz)
if err != nil {
fmt.Fprintf(os.Stderr, "could not parse bold font: %v\n", err)
os.Exit(1)
}
if normalFontData != nil {
style.Font, err = font.NewFace(normalFontData, sz)
if err != nil {
fmt.Fprintf(os.Stderr, "could not parse normal font: %v\n", err)
os.Exit(1)
}
}
arrowWidth = nucular.FontWidth(iconFace, arrowIconChar)
starWidth = nucular.FontWidth(style.Font, breakpointIconChar)
saveConfiguration()
}
const commandLineHeight = 28
type listline struct {
idx string
lineno int
text string
textWithTabs string
pc bool
bp *api.Breakpoint
bpenabled bool
}
var listingPanel struct {
file string
abbrevFile string
recenterListing bool
recenterDisassembly bool
listing []listline
text []wrappedInstruction
framePC uint64
pinnedLoc *api.Location
stale bool
optimized bool
id int
stepIntoInfo stepIntoInfo
stepIntoFilled bool
disassHoverIdx int
disassHoverClickIdx int
centerOnDisassHover bool
}
var wnd nucular.MasterWindow
var nextInProgress bool
var client *rpc2.RPCClient
var curThread, oldThread int
var curPid int
var curGid, oldGid int64
var curFrameOffset, oldFrameOffset int64
var firstStop bool = true
var ignoreFrameChange bool
var curFrame int
var curDeferredCall int
var curPC uint64
var lastModExe time.Time
var scriptRunning bool
var starlarkMode chan string
var starlarkPrompt string
var commandLineEditor nucular.TextEditor
var delayFrame bool
var frameCount int
var zoomMetaKey, zoomMetaKeyStr = getZoomMetaKey()
func getZoomMetaKey() (key.Modifiers, string) {
if runtime.GOOS == "darwin" {
// TODO(riad): should we keep the previous behaviour?
// We can use key.ModMeta | key.ModControl
return key.ModMeta, "Cmd"
}
return key.ModControl, "Ctrl"
}
func guiUpdate(w *nucular.Window) {
defer richTextCleanup()
df := delayFrame
delayFrame = false
if df {
time.Sleep(50 * time.Millisecond)
}
mw := w.Master()
for _, e := range wnd.Input().Keyboard.Keys {
switch {
case (e.Modifiers&zoomMetaKey != 0) && e.Code == key.CodeEqualSign:
// mitigation for shiny bug on macOS (see https://github.com/aarzilli/gdlv/issues/39)
fallthrough
case (e.Modifiers&zoomMetaKey != 0) && e.Rune == '+':
conf.Scaling += 0.1
setupStyle()
case (e.Modifiers&zoomMetaKey != 0) && e.Code == key.CodeHyphenMinus:
// mitigation for shiny bug on macOS (see https://github.com/aarzilli/gdlv/issues/39)
fallthrough
case (e.Modifiers&zoomMetaKey != 0) && e.Rune == '-':
conf.Scaling -= 0.1
setupStyle()
case (e.Modifiers&zoomMetaKey != 0) && e.Rune == '0':
conf.Scaling = 1.0
setupStyle()
case (e.Modifiers == key.ModControl) && (e.Code == key.CodeF):
mw.SetPerf(!mw.GetPerf())
case (e.Modifiers == 0) && (e.Code == key.CodeEscape):
mw.ActivateEditor(findWindow(infoCommand), &commandLineEditor)
mw.Changed()
case (e.Modifiers == key.ModAlt) && (e.Code == key.CodeReturnEnter):
fallthrough
case (e.Modifiers == 0) && (e.Code == key.CodeF5):
if !client.Running() && client != nil {
doCommand("continue")
}
case (e.Modifiers == 0) && (e.Code == key.CodeF10):
fallthrough
case (e.Modifiers == key.ModAlt) && (e.Code == key.CodeRightArrow):
if !client.Running() && client != nil {
doCommand("next")
}
case (e.Modifiers == 0) && (e.Code == key.CodeF11):
fallthrough
case (e.Modifiers == key.ModAlt) && (e.Code == key.CodeDownArrow):
if !client.Running() && client != nil {
doCommand("step")
}
case (e.Modifiers == key.ModShift) && (e.Code == key.CodeF11):
fallthrough
case (e.Modifiers == key.ModAlt) && (e.Code == key.CodeUpArrow):
if !client.Running() && client != nil {
doCommand("stepout")
}
case (e.Modifiers == key.ModShift) && (e.Code == key.CodeF5):
fallthrough
case (e.Modifiers == key.ModControl) && (e.Code == key.CodeDeleteForward):
if client != nil {
doCommand("interrupt")
}
case (e.Modifiers == key.ModShift) && (e.Code == key.CodeReturnEnter):
if findWindow(infoLocals) != nil {
go addExpression("", true)
}
case (e.Modifiers == key.ModAlt) && (e.Code == key.Code1):
openWindow(infoListing)
case (e.Modifiers == key.ModAlt) && (e.Code == key.Code2):
openWindow(infoLocals)
case (e.Modifiers == key.ModAlt) && (e.Code == key.Code3):
openWindow(infoGlobal)
case (e.Modifiers == key.ModAlt) && (e.Code == key.Code4):
openWindow(infoRegisters)
case (e.Modifiers == key.ModAlt) && (e.Code == key.Code5):
openWindow(infoBps)
case (e.Modifiers == key.ModAlt) && (e.Code == key.Code6):
openWindow(infoStacktrace)
case (e.Modifiers == key.ModAlt) && (e.Code == key.Code7):
openWindow(infoDisassembly)
case (e.Modifiers == key.ModAlt) && (e.Code == key.Code8):
openWindow(infoGoroutines)
case (e.Modifiers == key.ModAlt) && (e.Code == key.Code9):
openWindow(infoThreads)
}
}
descale := func(x int) int {
return int(float64(x) / conf.Scaling)
}
frameCount++
if frameCount%200 == 0 {
changed := false
wnd.Walk(func(_ *nucular.Window, title string, data interface{}, docked bool, size int, rect rect.Rect) {
if docked {
return
}
title = cleanWindowTitle(title)
rect.X = descale(rect.X)
rect.Y = descale(rect.Y)
rect.H = descale(rect.H)
rect.W = descale(rect.W)
if rect != conf.SavedBounds[title] {
conf.SavedBounds[title] = rect
changed = true
}
})
if changed {
saveConfiguration()
}
}
}
func currentPrompt() string {
if client.Running() {
return "running"
} else if client == nil {
switch {
case BackendServer.connectionFailed:
return "failed"
case !BackendServer.buildok:
return "build failed"
default:
return "connecting"
}
} else {
pmpt := ">"
if starlarkMode != nil {
pmpt = starlarkPrompt
}
pfx := ""
if curPid != 0 {
pfx = fmt.Sprintf("pid %d ", curPid)
}
if curThread < 0 {
return fmt.Sprintf("%sdlv%s", pfx, pmpt)
} else if curGid < 0 {
return fmt.Sprintf("%sthread %d:%d%s", pfx, curThread, curFrame, pmpt)
} else if curDeferredCall > 0 {
return fmt.Sprintf("%sdeferred call %d:%d:%d%s", pfx, curGid, curFrame, curDeferredCall, pmpt)
} else {
return fmt.Sprintf("%sgoroutine %d:%d%s", pfx, curGid, curFrame, pmpt)
}
}
}
func updateCommandPanel(w *nucular.Window) {
style := w.Master().Style()
w.Row(headerRow).Static()
w.LayoutReserveRow(commandLineHeight, 1)
commandToolbar(w)
w.Row(0).Dynamic(1)
if c := scrollbackEditor.Widget(w, scrollbackClear); c != nil {
c.SetStyle(richtext.TextStyle{Cursor: font.TextCursor})
scrollbackClear = false
c.Align(richtext.AlignLeftDumb)
if len(scrollbackPreInitWrite) > 0 {
c.Text(string(scrollbackPreInitWrite))
}
c.End()
scrollbackEditor.Sel.S = int32(len(scrollbackPreInitWrite))
scrollbackEditor.Sel.E = scrollbackEditor.Sel.S
scrollbackEditor.FollowCursor()
scrollbackMu.Lock()
scrollbackInitialized = true
scrollbackMu.Unlock()
}
p := currentPrompt()
p2 := p
if historySearch {
p2 += " (searching)"
}
promptwidth := nucular.FontWidth(style.Font, p2) + style.Text.Padding.X*2
w.Row(commandLineHeight).StaticScaled(promptwidth, 0)
w.Label(p2, "LC")
if client.Running() {
//commandLineEditor.Flags |= nucular.EditReadOnly
if !commandLineEditor.Active {
w.Master().ActivateEditor(w, &commandLineEditor)
}
} else {
commandLineEditor.Flags &= ^nucular.EditReadOnly
}
if commandLineEditor.Active {
showHistory := false
kbd := &w.Input().Keyboard
for _, k := range kbd.Keys {
switch {
case k.Modifiers == 0 && k.Code == key.CodeTab:
historySearch = false
w.Input().Keyboard.Text = ""
completeAny()
case k.Modifiers == 0 && k.Code == key.CodeUpArrow:
historySearch = false
historyShown--
showHistory = true
case k.Modifiers == 0 && k.Code == key.CodeDownArrow:
historySearch = false
historyShown++
showHistory = true
case k.Modifiers == key.ModControl && k.Code == key.CodeR:
historySearch = true
historyShown = -1
historyNeedle = ""
showHistory = true
case k.Modifiers == 0 && k.Code == key.CodeEscape:
historySearch = false
historyShown = -1
showHistory = true
case k.Modifiers == 0 && k.Code == key.CodeDeleteBackspace && historySearch:
historyNeedle = historyNeedle[:len(historyNeedle)]
}
}
if historySearch && kbd.Text != "" && kbd.Text != "\n" {
historyNeedle = historyNeedle + kbd.Text
kbd.Text = ""
searchHistory()
showHistory = true
}
if showHistory {
w.Input().Keyboard.Keys = w.Input().Keyboard.Keys[:0]
if historyShown < 0 || historyShown > len(cmdhistory) {
historyShown = len(cmdhistory)
}
if historyShown != len(cmdhistory) {
commandLineEditor.Buffer = []rune(cmdhistory[historyShown])
commandLineEditor.Cursor = len(commandLineEditor.Buffer)
commandLineEditor.CursorFollow = true
} else {
commandLineEditor.Buffer = commandLineEditor.Buffer[:0]
commandLineEditor.Cursor = 0
commandLineEditor.CursorFollow = true
}
}
}
active := commandLineEditor.Edit(w)
if active&nucular.EditCommitted != 0 {
historySearch = false
var scrollbackOut = editorWriter{false}
cmd := string(commandLineEditor.Buffer)
if scriptRunning {
fmt.Fprintf(&scrollbackOut, "a script is running\n")
} else if starlarkMode != nil {
cmdhistory = append(cmdhistory, cmd)
fmt.Fprintf(&scrollbackOut, "%s %s\n", p, cmd)
starlarkMode <- cmd
} else if canExecuteCmd(cmd) && !client.Running() {
if cmd == "" {
if len(cmdhistory) > 0 {
fmt.Fprintf(&scrollbackOut, "%s %s\n", p, cmdhistory[len(cmdhistory)-1])
cmd = cmdhistory[len(cmdhistory)-1]
} else {
cmd = "help"
}
} else {
cmdhistory = append(cmdhistory, cmd)
fmt.Fprintf(&scrollbackOut, "%s %s\n", p, cmd)
}
historyShown = len(cmdhistory)
go executeCommand(cmd)
} else if client.Running() && client != nil && BackendServer.stdinChan != nil && curThread >= 0 {
select {
case BackendServer.stdinChan <- cmd + "\n":
default:
}
} else {
fmt.Fprintf(&scrollbackOut, "Only quit and restart available when not connected to delve\n")
}
commandLineEditor.Buffer = commandLineEditor.Buffer[:0]
commandLineEditor.Cursor = 0
commandLineEditor.CursorFollow = true
commandLineEditor.Active = true
}
}
func searchHistory() {
if historyShown < 0 || historyShown >= len(cmdhistory) {
historyShown = len(cmdhistory) - 1
}
for historyShown >= 0 {
if strings.Index(cmdhistory[historyShown], historyNeedle) >= 0 {
return
}
historyShown--
}
historyShown = -1
}
func canExecuteCmd(cmd string) bool {
if client != nil {
return true
}
return cmd == "q" || cmd == "quit" || cmd == "r" || cmd == "restart"
}
func digits(n int) int {
if n <= 0 {
return 1
}
return int(math.Floor(math.Log10(float64(n)))) + 1
}
func expandTabsEx(in string, colno int) (string, int) {
hastab := false
for _, c := range in {
if c == '\t' {
hastab = true
break
}
}
if !hastab {
return in, colno
}
var buf bytes.Buffer
count := 0
colidx := -1
for i, c := range in {
switch c {
case '\t':
d := (((count/8)+1)*8 - count)
for i := 0; i < d; i++ {
colno--
buf.WriteRune(' ')
}
count = 0
case '\n':
colno--
buf.WriteRune('\n')
count = 0
default:
colno--
buf.WriteRune(c)
count++
}
if colno <= 0 && colidx < 0 {
colidx = i
}
}
return buf.String(), colidx
}
func expandTabs(in string) string {
r, _ := expandTabsEx(in, 0)
return r
}
type clearKind uint16
const (
clearFrameSwitch clearKind = iota
clearGoroutineSwitch
clearStop
clearBreakpoint
clearNothing
)
type refreshToFrame uint16
const (
refreshToFrameZero refreshToFrame = iota
refreshToSameFrame
refreshToUserFrame
)
func refreshState(toframe refreshToFrame, clearKind clearKind, state *api.DebuggerState) {
defer wnd.Changed()
if clearKind == clearStop {
oldGid = curGid
oldThread = curThread
oldFrameOffset = curFrameOffset
}
var scrollbackOut = editorWriter{false}
failstate := func(pos string, err error) {
fmt.Fprintf(&scrollbackOut, "Error refreshing state %s: %v\n", pos, err)
}
if state == nil {
var err error
state, err = client.GetState()
if err != nil {
wnd.Lock()
curThread = -1
curGid = -1
curFrame = 0
curDeferredCall = 0
if !strings.Contains(err.Error(), " has exited with status ") {
failstate("GetState()", err)
}
listingPanel.id++
if clearKind != clearBreakpoint {
loadListing(listingPanel.pinnedLoc, failstate)
}
wnd.Unlock()
return
}
} else if state != nil && state.Err != nil {
state2, err := client.GetState()
if err == nil && state2.Err == nil {
state = state2
}
}
wnd.Lock()
defer wnd.Unlock()
nextInProgress = state.NextInProgress
delayFrame = true
curPid = state.Pid
if curPid != 0 {
tgts, _ := client.ListTargets()
if len(tgts) <= 1 {
curPid = 0
}
}
if state.CurrentThread != nil {
curThread = state.CurrentThread.ID
} else {
curThread = -1
curFrame = 0
curDeferredCall = 0
}
if state.SelectedGoroutine != nil && state.SelectedGoroutine.ID > 0 {
curGid = state.SelectedGoroutine.ID
} else {
curGid = -1
}
switch clearKind {
case clearNothing:
// nothing to clear
case clearBreakpoint:
breakpointsPanel.asyncLoad.clear()
checkpointsPanel.asyncLoad.clear()
case clearFrameSwitch:
localsPanel.asyncLoad.clear()
listingPanel.pinnedLoc = nil
for i := range stackPanel.isnew {
stackPanel.isnew[i] = false
}
case clearGoroutineSwitch:
stackPanel.asyncLoad.clear()
localsPanel.asyncLoad.clear()
regsPanel.asyncLoad.clear()
listingPanel.pinnedLoc = nil
case clearStop:
localsPanel.asyncLoad.clear()
regsPanel.asyncLoad.clear()
goroutinesPanel.asyncLoad.clear()
stackPanel.asyncLoad.clear()
threadsPanel.asyncLoad.clear()
globalsPanel.asyncLoad.clear()
breakpointsPanel.asyncLoad.clear()
checkpointsPanel.asyncLoad.clear()
listingPanel.pinnedLoc = nil
silenced = false
bpcount := 0
for _, th := range state.Threads {
if th.Breakpoint != nil {
bpcount++
}
}
if bpcount > 1 {
fmt.Fprintf(&scrollbackOut, "Simultaneously stopped on %d goroutines!\n", bpcount)
}
}
loc := listingPanel.pinnedLoc
if loc == nil {
findCurrentLocation:
switch toframe {
case refreshToFrameZero:
curFrame = 0
curDeferredCall = 0
loc = currentLocation(state)
case refreshToSameFrame:
frames, err := client.Stacktrace(curGid, curFrame+1, api.StacktraceReadDefers, nil)
if err != nil {
curFrame = 0
curDeferredCall = 0
failstate("Stacktrace()", err)
return
}
if curFrame >= len(frames) {
curFrame = 0
curDeferredCall = 0
}
if curFrame < len(frames) {
if curDeferredCall-1 >= len(frames[curFrame].Defers) {
curDeferredCall = 0
}
if curDeferredCall <= 0 {
loc = &frames[curFrame].Location
} else if curDeferredCall-1 < len(frames[curFrame].Defers) {
if stackPanel.showDeferPos {
loc = &frames[curFrame].Defers[curDeferredCall-1].DeferLoc
} else {
loc = &frames[curFrame].Defers[curDeferredCall-1].DeferredLoc
}
}
}
case refreshToUserFrame:
const runtimeprefix = "runtime."
curFrame = 0
curDeferredCall = 0
frames, err := client.Stacktrace(curGid, 20, 0, nil)
if err != nil {
failstate("Stacktrace()", err)
return
}
if len(frames) == 0 {
toframe = refreshToFrameZero
goto findCurrentLocation
}
for i := range frames {
if frames[i].Function == nil {
continue
}
name := frames[i].Function.Name()
if !strings.HasPrefix(name, runtimeprefix) {
curFrame = i
curDeferredCall = 0
break
}
if len(name) > len(runtimeprefix) {
ch := name[len(runtimeprefix)]
if ch >= 'A' && ch <= 'Z' {
curFrame = i
curDeferredCall = 0
break
}
}
}
loc = &frames[curFrame].Location
}
}
if loc == nil {
curPC = 0
return
}
curPC = loc.PC
listingPanel.id++
listingPanel.text = nil
disassemblyPanel.asyncLoad.clear()
disassemblyPanel.loc = *loc
if clearKind != clearBreakpoint {
loadListing(loc, failstate)
}
applyBreakpoints(failstate)
if clearKind == clearStop {
frames, _ := client.Stacktrace(curGid, 1, 0, nil)
if len(frames) > 0 {
curFrameOffset = frames[0].FrameOffset
}
}
if clearKind == clearStop && ignoreFrameChange {
ignoreFrameChange = false
oldFrameOffset = curFrameOffset
}
if clearKind == clearStop && firstStop {
firstStop = false
oldGid = curGid
oldThread = curThread
oldFrameOffset = curFrameOffset
}
wnd.Walk(func(_ *nucular.Window, title string, data interface{}, docked bool, splitSize int, rect rect.Rect) {
if asyncLoad, ok := data.(*asyncLoad); ok && asyncLoad != nil {
if title == "Details" && clearKind != clearNothing && clearKind != clearBreakpoint {
asyncLoad.clear()
}
asyncLoad.startLoad()
}
})
}
func loadDisassembly(p *asyncLoad) {
listingPanel.text = nil
listingPanel.recenterDisassembly = true
listingPanel.disassHoverIdx = -1
listingPanel.disassHoverClickIdx = -1
loc := disassemblyPanel.loc
flavour := api.IntelFlavour
if conf.DisassemblyFlavour == 1 {
flavour = api.GNUFlavour
}
if loc.PC != 0 {
text, err := client.DisassemblePC(currentEvalScope(), loc.PC, flavour)
if err != nil {
p.done(err)
return
}
listingPanel.text = wrapInstructions(text, loc.PC)
listingPanel.framePC = loc.PC
} else {
listingPanel.text = nil
listingPanel.framePC = 0
}
p.done(nil)
}
func loadListing(loc *api.Location, failstate func(string, error)) {
listingPanel.listing = listingPanel.listing[:0]
listingPanel.recenterListing = true
listingPanel.stepIntoInfo.Filename = ""
listingPanel.stepIntoInfo.Lineno = -1
listingPanel.stepIntoInfo.Colno = -1
listingPanel.stepIntoInfo.Valid = false
if loc == nil {
listingPanel.file = ""
listingPanel.abbrevFile = ""
return
}
listingPanel.file = loc.File
listingPanel.abbrevFile = abbrevFileName(loc.File)
if loc.File == "<autogenerated>" {
return
}
fh, err := os.Open(conf.substitutePath(loc.File))
if err != nil {
failstate("Open()", err)
return
}
defer fh.Close()
fi, _ := fh.Stat()
listingPanel.stale = fi.ModTime().After(lastModExe)
listingPanel.optimized = false
if loc.Function != nil && loc.Function.Optimized {
listingPanel.optimized = true
}
buf := bufio.NewScanner(fh)
lineno := 0
for buf.Scan() {
lineno++
atpc := lineno == loc.Line && listingPanel.pinnedLoc == nil
linetext := expandTabs(buf.Text())
listingPanel.listing = append(listingPanel.listing, listline{"", lineno, linetext, buf.Text(), atpc, nil, false})
}
const maxFontCacheSize = 500000
sz := 4*len(listingPanel.listing) + len(listingPanel.listing)/2
if sz > maxFontCacheSize {
sz = maxFontCacheSize
}
nucular.ChangeFontWidthCache(sz)
if err := buf.Err(); err != nil {
failstate("(reading file)", err)
return
}
d := digits(len(listingPanel.listing))
if d < 3 {
d = 3
}
for i := range listingPanel.listing {
listingPanel.listing[i].idx = fmt.Sprintf("%*d", d, i+1)
}
}
func applyBreakpoints(failstate func(string, error)) {
breakpoints, err := client.ListBreakpoints(false)
if err != nil {
failstate("ListBreakpoints()", err)
return
}
bpmap := map[int]*api.Breakpoint{}
for _, bp := range breakpoints {
if bp.File == listingPanel.file {
bpmap[bp.Line] = bp
}
}
for i := range listingPanel.listing {
b := bpmap[listingPanel.listing[i].lineno]
listingPanel.listing[i].bp = b
listingPanel.listing[i].bpenabled = false
if b != nil {
listingPanel.listing[i].bpenabled = !b.Disabled
}
}
}
func currentLocation(state *api.DebuggerState) *api.Location {
if state.SelectedGoroutine != nil {
if state.CurrentThread != nil && state.SelectedGoroutine.ThreadID == state.CurrentThread.ID {
return &api.Location{File: state.CurrentThread.File, Line: state.CurrentThread.Line, PC: state.CurrentThread.PC, Function: state.CurrentThread.Function}
} else {
return &state.SelectedGoroutine.CurrentLoc
}
} else if state.CurrentThread != nil {
return &api.Location{File: state.CurrentThread.File, Line: state.CurrentThread.Line, PC: state.CurrentThread.PC, Function: state.CurrentThread.Function}
}
return nil
}
func currentEvalScope() api.EvalScope {
return api.EvalScope{curGid, curFrame, curDeferredCall}
}
func usage(err string) {
if err != "" {
if err[len(err)-1] != '\n' {
err += "\n"
}
fmt.Fprintf(os.Stderr, err)
}
fmt.Fprintf(os.Stderr, `Usage:
gdlv [options] connect <address>
gdlv [options] debug <program's arguments...>
gdlv [options] run <program file> <program's arguments...>
gdlv [options] exec <executable> <program's arguments...>
gdlv [options] test <testflags...>
gdlv [options] attach <pid> [path to executable]
gdlv [options] core <executable> <core file>