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Print context after step, next or continue

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This commit is contained in:
Derek Parker
2014-09-06 19:39:40 -05:00
parent aefbd8f35a
commit a3612dd10f
1 changed files with 48 additions and 19 deletions
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67
command/command.go
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@ -3,8 +3,11 @@
package command
import (
"bufio"
"debug/gosym"
"fmt"
"io"
"os"
"path/filepath"
"strconv"
"strings"
@ -68,7 +71,12 @@ func nullCommand(p *proctl.DebuggedProcess, ars ...string) error {
}
func cont(p *proctl.DebuggedProcess, ars ...string) error {
return p.Continue()
err := p.Continue()
if err != nil {
return err
}
return printcontext(p)
}
func step(p *proctl.DebuggedProcess, args ...string) error {
@ -77,15 +85,7 @@ func step(p *proctl.DebuggedProcess, args ...string) error {
return err
}
regs, err := p.Registers()
if err != nil {
return err
}
f, l, _ := p.GoSymTable.PCToLine(regs.PC())
fmt.Printf("Stopped at: %s:%d\n", f, l)
return nil
return printcontext(p)
}
func next(p *proctl.DebuggedProcess, args ...string) error {
@ -94,15 +94,7 @@ func next(p *proctl.DebuggedProcess, args ...string) error {
return err
}
regs, err := p.Registers()
if err != nil {
return err
}
f, l, _ := p.GoSymTable.PCToLine(regs.PC())
fmt.Printf("Stopped at: %s:%d\n", f, l)
return nil
return printcontext(p)
}
func clear(p *proctl.DebuggedProcess, args ...string) error {
@ -164,3 +156,40 @@ func breakpoint(p *proctl.DebuggedProcess, args ...string) error {
return nil
}
func printcontext(p *proctl.DebuggedProcess) error {
var context []string
regs, err := p.Registers()
if err != nil {
return err
}
f, l, _ := p.GoSymTable.PCToLine(regs.PC())
fmt.Printf("Stopped at: %s:%d\n", f, l)
file, err := os.Open(f)
if err != nil {
return err
}
defer file.Close()
buf := bufio.NewReader(file)
for i := 1; i <= l+5; i++ {
line, err := buf.ReadString('\n')
if err != nil && err != io.EOF {
return err
}
if i >= (l - 5) {
if i == l {
line = "=>" + line
}
context = append(context, line)
}
}
fmt.Println(strings.Join(context, " "))
return nil
}