feat: Waku v2 bridge

Issue #12610

vendor/github.com/anacrolix/envpprof/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Matt Joiner
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/github.com/anacrolix/envpprof/README.md

@@ -0,0 +1,14 @@
+# envpprof
+
+[![pkg.go.dev badge](https://img.shields.io/badge/pkg.go.dev-reference-blue)](https://pkg.go.dev/github.com/anacrolix/envpprof)
+
+Allows run-time configuration of Go's pprof features and default HTTP mux using the environment variable `GOPPROF`. Import the package with `import _ "github.com/anacrolix/envpprof"`. `envpprof` has an `init` function that will run at process initialization that checks the value of the `GOPPROF` environment variable. The variable can contain a comma-separated list of values, for example `GOPPROF=http,block`. The supported keys are:
+
+Key | Effect
+--- | ------
+http | Exposes the default HTTP muxer [`"net/http".DefaultServeMux`](https://pkg.go.dev/net/http?tab=doc#pkg-variables) to the first free TCP port after `6060` on `localhost`. The process PID, and location are logged automatically when this is enabled. `DefaultServeMux` is frequently the default location to expose status, and debugging endpoints, including those provided by [`net/http/pprof`](https://pkg.go.dev/net/http/pprof?tab=doc). Note that the `net/http/pprof` import is included with `envpprof`, and exposed on `DefaultServeMux`.
+cpu |Calls [`"runtime/pprof".StartCPUProfile`](https://pkg.go.dev/runtime/pprof?tab=doc#StartCPUProfile), writing to a temporary file in `$HOME/pprof` with the prefix `cpu`. The file is not removed after use. The name of the file is logged when this is enabled. [`envpprof.Stop`](https://pkg.go.dev/github.com/anacrolix/envpprof?tab=doc#Stop) should be deferred from `main` when this will be used, to ensure proper clean up.
+heap |This is similar to the `cpu` key, but writes heap profile information to a file prefixed with `heap`. The profile will not be written unless `Stop` is invoked. See `cpu` for more. 
+block | This calls [`"runtime".SetBlockProfileRate(1)`](https://pkg.go.dev/runtime?tab=doc#SetBlockProfileRate) enabling the profiling of goroutine blocking events. Note that if `http` is enabled, this exposes the blocking profile at the HTTP path `/debug/pprof/block` per package [`net/http/pprof`](https://pkg.go.dev/net/http/pprof?tab=doc#pkg-overview).
+mutex | This calls [`"runtime".SetMutexProfileFraction(1)`](https://pkg.go.dev/runtime?tab=doc#SetMutexProfileFraction) enabling profiling of mutex contention events. Note that if `http` is enabled, this exposes the profile at the HTTP path `/debug/pprof/mutex` per package [`net/http/pprof`](https://pkg.go.dev/net/http/pprof?tab=doc#pkg-overview).
+

vendor/github.com/anacrolix/envpprof/envpprof.go

@@ -0,0 +1,112 @@
+package envpprof
+
+import (
+	"expvar"
+	"fmt"
+	"io/ioutil"
+	"net"
+	"net/http"
+	_ "net/http/pprof"
+	"os"
+	"path/filepath"
+	"runtime"
+	"runtime/pprof"
+	"strings"
+
+	"github.com/anacrolix/log"
+)
+
+var (
+	pprofDir = filepath.Join(os.Getenv("HOME"), "pprof")
+	heap     bool
+)
+
+func writeHeapProfile() {
+	os.Mkdir(pprofDir, 0750)
+	f, err := ioutil.TempFile(pprofDir, "heap")
+	if err != nil {
+		log.Printf("error creating heap profile file: %s", err)
+		return
+	}
+	defer f.Close()
+	pprof.WriteHeapProfile(f)
+	log.Printf("wrote heap profile to %q", f.Name())
+}
+
+// Stop ends CPU profiling, waiting for writes to complete. If heap profiling is enabled, it also
+// writes the heap profile to a file. Stop should be deferred from main if cpu or heap profiling
+// are to be used through envpprof.
+func Stop() {
+	// Should we check if CPU profiling was initiated through this package?
+	pprof.StopCPUProfile()
+	if heap {
+		// Can or should we do this concurrently with stopping CPU profiling?
+		writeHeapProfile()
+	}
+}
+
+func startHTTP() {
+	var l net.Listener
+	for port := uint16(6061); port != 6060; port++ {
+		var err error
+		l, err = net.Listen("tcp", fmt.Sprintf("localhost:%d", port))
+		if err == nil {
+			break
+		}
+	}
+	if l == nil {
+		log.Print("unable to create envpprof listener for http")
+		return
+	}
+	log.Printf("(pid=%d) envpprof serving http://%s", os.Getpid(), l.Addr())
+	go func() {
+		defer l.Close()
+		log.Printf("error serving http on envpprof listener: %s", http.Serve(l, nil))
+	}()
+}
+
+func init() {
+	expvar.Publish("numGoroutine", expvar.Func(func() interface{} { return runtime.NumGoroutine() }))
+	_var := os.Getenv("GOPPROF")
+	if _var == "" {
+		return
+	}
+	for _, item := range strings.Split(os.Getenv("GOPPROF"), ",") {
+		equalsPos := strings.IndexByte(item, '=')
+		var key, value string
+		if equalsPos < 0 {
+			key = item
+		} else {
+			key = item[:equalsPos]
+			value = item[equalsPos+1:]
+		}
+		if value != "" {
+			log.Printf("values not yet supported")
+		}
+		switch key {
+		case "http":
+			startHTTP()
+		case "cpu":
+			os.Mkdir(pprofDir, 0750)
+			f, err := ioutil.TempFile(pprofDir, "cpu")
+			if err != nil {
+				log.Printf("error creating cpu pprof file: %s", err)
+				break
+			}
+			err = pprof.StartCPUProfile(f)
+			if err != nil {
+				log.Printf("error starting cpu profiling: %s", err)
+				break
+			}
+			log.Printf("cpu profiling to file %q", f.Name())
+		case "block":
+			runtime.SetBlockProfileRate(1)
+		case "heap":
+			heap = true
+		case "mutex":
+			runtime.SetMutexProfileFraction(1)
+		default:
+			log.Printf("unexpected GOPPROF key %q", key)
+		}
+	}
+}