From afed5c3703d29774bad0759ac7138c8b5634b494 Mon Sep 17 00:00:00 2001
From: Dan Ballard <dan@mindstab.net>
Date: Thu, 13 Apr 2023 12:38:54 -0500
Subject: [PATCH] add back in missing DebugInfo

---
 templates/lib_template.go | 43 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/templates/lib_template.go b/templates/lib_template.go
index 72ba227..c962d54 100644
--- a/templates/lib_template.go
+++ b/templates/lib_template.go
@@ -20,6 +20,7 @@ import (
 	"os/user"
 	path "path/filepath"
 	"runtime"
+	"runtime/pprof"
 	"strings"
 	"time"
 	mrand "math/rand"
@@ -510,6 +511,48 @@ func UpdateSettings(settingsJson string) {
 	{{EXPERIMENT_UPDATESETTINGS}}
 }
 
+//export c_GetDebugInfo
+func c_GetDebugInfo() *C.char {
+	return C.CString(GetDebugInfo())
+}
+
+type DebugInfo struct {
+	BuildVersion  string
+	BuildDate     string
+	HeapAllocated float64
+	HeapInUse     float64
+	HeapReleased  float64
+	HeapObjects   uint64
+	NumThreads    uint64
+	SystemMemory  float64
+}
+
+func GetDebugInfo() string {
+
+	var memstats runtime.MemStats
+	runtime.ReadMemStats(&memstats)
+
+	const MegaByte = 1024.0 * 1024.0
+
+	debugInfo := new(DebugInfo)
+	debugInfo.BuildVersion = buildVer
+	debugInfo.BuildDate = buildDate
+	debugInfo.HeapAllocated = float64(memstats.HeapAlloc) / MegaByte
+	debugInfo.HeapObjects = memstats.HeapObjects
+	debugInfo.NumThreads = uint64(runtime.NumGoroutine())
+	debugInfo.HeapReleased = float64(memstats.HeapReleased) / MegaByte
+	debugInfo.HeapInUse = float64(memstats.HeapInuse) / MegaByte
+	debugInfo.SystemMemory = float64(memstats.Sys) / MegaByte
+
+	if os.Getenv("CWTCH_PROFILE") == "1" {
+		pprof.Lookup("goroutine").WriteTo(os.Stdout, 1)
+		f, _ := os.Create("mem.prof")
+		pprof.WriteHeapProfile(f)
+	}
+
+	data, _ := json.Marshal(debugInfo)
+	return string(data)
+}
 
 {{BINDINGS}}