Add experimental debug options

box.go

@@ -39,18 +39,20 @@ type Box struct {
 
 func New(ctx context.Context, options option.Options, platformInterface platform.Interface) (*Box, error) {
 	createdAt := time.Now()
-	logOptions := common.PtrValueOrDefault(options.Log)
+
+	experimentalOptions := common.PtrValueOrDefault(options.Experimental)
+	applyDebugOptions(common.PtrValueOrDefault(experimentalOptions.Debug))
 
 	var needClashAPI bool
 	var needV2RayAPI bool
-	if options.Experimental != nil {
+	if experimentalOptions.ClashAPI != nil && experimentalOptions.ClashAPI.ExternalController != "" {
-		if options.Experimental.ClashAPI != nil && options.Experimental.ClashAPI.ExternalController != "" {
 		needClashAPI = true
 	}
-		if options.Experimental.V2RayAPI != nil && options.Experimental.V2RayAPI.Listen != "" {
+	if experimentalOptions.V2RayAPI != nil && experimentalOptions.V2RayAPI.Listen != "" {
 		needV2RayAPI = true
 	}
-	}
+
+	logOptions := common.PtrValueOrDefault(options.Log)
 
 	var logFactory log.Factory
 	var observableLogFactory log.ObservableFactory

debug.go

@@ -0,0 +1,35 @@
+//go:build go1.19
+
+package box
+
+import (
+	"runtime/debug"
+
+	"github.com/sagernet/sing-box/common/dialer/conntrack"
+	"github.com/sagernet/sing-box/option"
+)
+
+func applyDebugOptions(options option.DebugOptions) {
+	if options.GCPercent != nil {
+		debug.SetGCPercent(*options.GCPercent)
+	}
+	if options.MaxStack != nil {
+		debug.SetMaxStack(*options.MaxStack)
+	}
+	if options.MaxThreads != nil {
+		debug.SetMaxThreads(*options.MaxThreads)
+	}
+	if options.PanicOnFault != nil {
+		debug.SetPanicOnFault(*options.PanicOnFault)
+	}
+	if options.TraceBack != "" {
+		debug.SetTraceback(options.TraceBack)
+	}
+	if options.MemoryLimit != 0 {
+		debug.SetMemoryLimit(int64(options.MemoryLimit))
+		conntrack.MemoryLimit = int64(options.MemoryLimit)
+	}
+	if options.OOMKiller != nil {
+		conntrack.KillerEnabled = *options.OOMKiller
+	}
+}

debug_go118.go

@@ -0,0 +1,35 @@
+//go:build !go1.19
+
+package box
+
+import (
+	"runtime/debug"
+
+	"github.com/sagernet/sing-box/common/dialer/conntrack"
+	"github.com/sagernet/sing-box/option"
+)
+
+func applyDebugOptions(options option.DebugOptions) {
+	if options.GCPercent != nil {
+		debug.SetGCPercent(*options.GCPercent)
+	}
+	if options.MaxStack != nil {
+		debug.SetMaxStack(*options.MaxStack)
+	}
+	if options.MaxThreads != nil {
+		debug.SetMaxThreads(*options.MaxThreads)
+	}
+	if options.PanicOnFault != nil {
+		debug.SetPanicOnFault(*options.PanicOnFault)
+	}
+	if options.TraceBack != "" {
+		debug.SetTraceback(options.TraceBack)
+	}
+	if options.MemoryLimit != 0 {
+		// debug.SetMemoryLimit(int64(options.MemoryLimit))
+		conntrack.MemoryLimit = int64(options.MemoryLimit)
+	}
+	if options.OOMKiller != nil {
+		conntrack.KillerEnabled = *options.OOMKiller
+	}
+}

option/debug.go

@@ -0,0 +1,43 @@
+package option
+
+import (
+	"encoding/json"
+
+	"github.com/dustin/go-humanize"
+)
+
+type DebugOptions struct {
+	GCPercent    *int        `json:"gc_percent,omitempty"`
+	MaxStack     *int        `json:"max_stack,omitempty"`
+	MaxThreads   *int        `json:"max_threads,omitempty"`
+	PanicOnFault *bool       `json:"panic_on_fault,omitempty"`
+	TraceBack    string      `json:"trace_back,omitempty"`
+	MemoryLimit  BytesLength `json:"memory_limit,omitempty"`
+	OOMKiller    *bool       `json:"oom_killer,omitempty"`
+}
+
+type BytesLength int64
+
+func (l BytesLength) MarshalJSON() ([]byte, error) {
+	return json.Marshal(humanize.IBytes(uint64(l)))
+}
+
+func (l *BytesLength) UnmarshalJSON(bytes []byte) error {
+	var valueInteger int64
+	err := json.Unmarshal(bytes, &valueInteger)
+	if err == nil {
+		*l = BytesLength(valueInteger)
+		return nil
+	}
+	var valueString string
+	err = json.Unmarshal(bytes, &valueString)
+	if err != nil {
+		return err
+	}
+	parsedValue, err := humanize.ParseBytes(valueString)
+	if err != nil {
+		return err
+	}
+	*l = BytesLength(parsedValue)
+	return nil
+}

option/experimental.go

@@ -3,4 +3,5 @@ package option
 type ExperimentalOptions struct {
 	ClashAPI *ClashAPIOptions `json:"clash_api,omitempty"`
 	V2RayAPI *V2RayAPIOptions `json:"v2ray_api,omitempty"`
+	Debug    *DebugOptions    `json:"debug,omitempty"`
 }