// TODO(austin): All of these tests are skipped if the debuglog build
// tag isn't provided. That means we basically never test debuglog.
// There are two potential ways around this:
//
// 1. Make these tests re-build the runtime test with the debuglog
// build tag and re-invoke themselves.
//
// 2. Always build the whole debuglog infrastructure and depend on

	mp := getg().m
	mp.locks++ // do not reschedule between printlock++ and lock(&debuglock).
	mp.printlock++
	if mp.printlock == 1 {
		lock(&debuglock)
	}
	mp.locks-- // now we know debuglock is held and holding up mp.locks for us.
}

func printunlock() {
	mp := getg().m
	mp.printlock--
	if mp.printlock == 0 {
		unlock(&debuglock)
	}
}

// write to goroutine-local buffer if diverting output,

// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build !debuglog

package runtime

const dlogEnabled = false

type dlogPerM struct{}

func getCachedDlogger() *dlogger {
	return nil
}

func putCachedDlogger(l *dlogger) bool {
	return false

        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          latest_changes_file: docs/en/docs/release-notes.md
          latest_changes_header: '## Latest Changes'
          end_regex: '^## '
          debug_logs: true

}

// mustLinkExternal reports whether the program being linked requires
// the external linker be used to complete the link.
func mustLinkExternal(ctxt *Link) (res bool, reason string) {
	if ctxt.Debugvlog > 1 {
		defer func() {
			if res {
				ctxt.Logf("external linking is forced by: %s\n", reason)
			}
		}()
	}

	if platform.MustLinkExternal(buildcfg.GOOS, buildcfg.GOARCH, false) {

// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build debuglog

package runtime

const dlogEnabled = true

// dlogPerM is the per-M debug log data. This is embedded in the m
// struct.
type dlogPerM struct {
	dlogCache *dlogger
}

// getCachedDlogger returns a cached dlogger if it can do so

	var err error
	argv0 := argv[0]
	if filepath.Base(argv0) == argv0 {
		argv0, err = exec.LookPath(argv0)
		if err != nil {
			Exitf("cannot find %s: %v", argv[0], err)
		}
	}
	if ctxt.Debugvlog != 0 {
		ctxt.Logf("invoking archiver with syscall.Exec()\n")
	}
	err = syscall.Exec(argv0, argv, os.Environ())
	if err != nil {
		Exitf("running %s failed: %v", argv[0], err)
	}

// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Export debuglog guts for testing.

package runtime

const DlogEnabled = dlogEnabled

const DebugLogBytes = debugLogBytes

const DebugLogStringLimit = debugLogStringLimit

var Dlog = dlog

func (l *dlogger) End()                  { l.end() }

// libgcc.a.
func hostArchive(ctxt *Link, name string) {
	if ctxt.Debugvlog > 1 {
		ctxt.Logf("hostArchive(%s)\n", name)
	}
	f, err := bio.Open(name)
	if err != nil {
		if os.IsNotExist(err) {
			// It's OK if we don't have a libgcc file at all.
			if ctxt.Debugvlog != 0 {
				ctxt.Logf("skipping libgcc file: %v\n", err)
			}
			return
		}

	if architecture == nil {
		log.Fatalf("unrecognized architecture %s", GOARCH)
	}
	ctxt := obj.Linknew(architecture.LinkArch)
	ctxt.Debugasm = flags.PrintOut
	ctxt.Debugvlog = flags.DebugV
	ctxt.Flag_dynlink = *flags.Dynlink
	ctxt.Flag_linkshared = *flags.Linkshared
	ctxt.Flag_shared = *flags.Shared || *flags.Dynlink
	ctxt.Flag_maymorestack = flags.DebugFlags.MayMoreStack