/
debug.go
113 lines (89 loc) · 2.19 KB
/
debug.go
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// SPDX-FileCopyrightText: 2023 Steffen Vogel <post@steffenvogel.de>
// SPDX-License-Identifier: Apache-2.0
// Limit debugger support to platforms which are supported by Delve
// See: https://github.com/go-delve/delve/blob/master/pkg/proc/native/support_sentinel_linux.go
//go:build linux && (amd64 || arm64 || 386)
package gont
import (
"fmt"
"net"
"strconv"
"github.com/go-delve/delve/service/api"
"go.uber.org/zap"
)
type DebuggerOption interface {
ApplyDebugger(*Debugger)
}
type Debugger struct {
// Options
BreakOnEntry bool
DetachOnExit bool
Tracepoints []Tracepoint
Tracers []*Tracer
ListenAddr string
DebugInfoDirectories []string
listenAddr *net.TCPAddr
instances map[int]*debuggerInstance
stop chan struct{}
logger *zap.Logger
}
func (d *Debugger) ApplyNetwork(n *Network) {
n.Debugger = d
}
func (d *Debugger) ApplyBaseNode(n *BaseNode) {
n.Debugger = d
}
func (d *Debugger) ApplyCmd(c *Cmd) {
c.Debugger = d
}
func NewDebugger(opts ...DebuggerOption) *Debugger {
d := &Debugger{
DebugInfoDirectories: []string{"/usr/lib/debug/.build-id"},
DetachOnExit: true,
instances: map[int]*debuggerInstance{},
stop: make(chan struct{}),
logger: zap.L().Named("debug"),
}
for _, opt := range opts {
opt.ApplyDebugger(d)
}
if d.ListenAddr != "" {
host, port, err := net.SplitHostPort(d.ListenAddr)
if err != nil {
panic(err)
}
portnum, err := strconv.Atoi(port)
if err != nil {
panic(err)
}
d.listenAddr = &net.TCPAddr{
IP: net.ParseIP(host),
Port: portnum,
}
}
return d
}
func (d *Debugger) Close() error {
close(d.stop)
for _, dbg := range d.instances {
if dbg.IsRunning() {
if _, err := dbg.Command(&api.DebuggerCommand{Name: api.Halt}, nil); err != nil {
return fmt.Errorf("failed to halt process: %w", err)
}
}
if err := dbg.Detach(false); err != nil {
return fmt.Errorf("failed to detach from process: %w", err)
}
}
return nil
}
func (d *Debugger) nextListenAddr() *net.TCPAddr {
if d.listenAddr == nil {
return nil
}
return &net.TCPAddr{
IP: d.listenAddr.IP,
Zone: d.listenAddr.Zone,
Port: d.listenAddr.Port + len(d.instances),
}
}