Add gops agent

vendor/github.com/google/gops/signal/signal.go

@@ -0,0 +1,35 @@
+// Copyright 2016 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.
+
+// Package signal contains signals used to communicate to the gops agents.
+package signal
+
+const (
+	// StackTrace represents a command to print stack trace.
+	StackTrace = byte(0x1)
+
+	// GC runs the garbage collector.
+	GC = byte(0x2)
+
+	// MemStats reports memory stats.
+	MemStats = byte(0x3)
+
+	// Version prints the Go version.
+	Version = byte(0x4)
+
+	// HeapProfile starts `go tool pprof` with the current memory profile.
+	HeapProfile = byte(0x5)
+
+	// CPUProfile starts `go tool pprof` with the current CPU profile
+	CPUProfile = byte(0x6)
+
+	// Stats returns Go runtime statistics such as number of goroutines, GOMAXPROCS, and NumCPU.
+	Stats = byte(0x7)
+
+	// Trace starts the Go execution tracer, waits 5 seconds and launches the trace tool.
+	Trace = byte(0x8)
+
+	// BinaryDump returns running binary file.
+	BinaryDump = byte(0x9)
+)