Fix credential cleanup and explicit tuning flags

core/edge_cases_test.go

@@ -575,9 +575,9 @@ func TestClampInt(t *testing.T) {
 		{0, 1, 10, 1},
 		{15, 1, 10, 10},
 		{-5, -10, -1, -5},
-		{5, 5, 5, 5},     // min == max == v
-		{3, 5, 5, 5},     // v < min == max
-		{10, 5, 5, 5},    // v > min == max
+		{5, 5, 5, 5},  // min == max == v
+		{3, 5, 5, 5},  // v < min == max
+		{10, 5, 5, 5}, // v > min == max
 	}
 
 	for _, tt := range tests {
@@ -636,4 +636,16 @@ func TestIsExplicit(t *testing.T) {
 	if !isExplicit(config, "t") {
 		t.Error("ThreadNumExplicit=true 应视为显式")
 	}
+
+	config = makeDefaultConfig()
+	config.TimeoutExplicit = true
+	config.ModuleThreadNumExplicit = true
+	config.MaxRetriesExplicit = true
+	config.Network.ICMPRateExplicit = true
+	config.POC.NumExplicit = true
+	if !isExplicit(config, "time") || !isExplicit(config, "mt") ||
+		!isExplicit(config, "retry") || !isExplicit(config, "icmp-rate") ||
+		!isExplicit(config, "num") {
+		t.Error("显式标记为 true 时默认值也应视为显式")
+	}
 }

core/env_profiler.go

@@ -180,22 +180,22 @@ func computeICMPRate(net *NetworkProfile, sys *SystemProfile) float64 {
 	return base
 }
 
-// isExplicit 检查参数是否被用户显式指定
-// 目前只有 ThreadNum 有 explicit 标记，其他参数通过检查是否为默认值来判断
+// isExplicit 检查参数是否被用户显式指定。
+// 显式标记来自 CLI flag.Visit；值比较保留 SDK/测试里直接构造 Config 的旧行为。
 func isExplicit(config *common.Config, flagName string) bool {
 	switch flagName {
 	case "t":
 		return config.ThreadNumExplicit
 	case "time":
-		return config.Timeout != 3*time.Second // 默认值
+		return config.TimeoutExplicit || config.Timeout != 3*time.Second
 	case "mt":
-		return config.ModuleThreadNum != 20 // 默认值
+		return config.ModuleThreadNumExplicit || config.ModuleThreadNum != 20
 	case "retry":
-		return config.MaxRetries != 3 // 默认值
+		return config.MaxRetriesExplicit || config.MaxRetries != 3
 	case "icmp-rate":
-		return config.Network.ICMPRate != 0.1 // 默认值
+		return config.Network.ICMPRateExplicit || config.Network.ICMPRate != 0.1
 	case "num":
-		return config.POC.Num != 20 // 默认值
+		return config.POC.NumExplicit || config.POC.Num != 20
 	}
 	return false
 }

core/env_profiler_test.go

@@ -214,11 +214,11 @@ func TestTuneConfig_SlowLossy(t *testing.T) {
 
 func TestTuneConfig_ExplicitOverride(t *testing.T) {
 	config := makeDefaultConfig()
-	config.Timeout = 5 * time.Second       // 用户设了 -time 5
-	config.ModuleThreadNum = 50            // 用户设了 -mt 50
-	config.MaxRetries = 1                  // 用户设了 -retry 1
-	config.Network.ICMPRate = 0.8          // 用户设了 -icmp-rate 0.8
-	config.POC.Num = 100                   // 用户设了 -num 100
+	config.Timeout = 5 * time.Second // 用户设了 -time 5
+	config.ModuleThreadNum = 50      // 用户设了 -mt 50
+	config.MaxRetries = 1            // 用户设了 -retry 1
+	config.Network.ICMPRate = 0.8    // 用户设了 -icmp-rate 0.8
+	config.POC.Num = 100             // 用户设了 -num 100
 	session := makeTestSession(config)
 
 	ep := &EnvironmentProfile{
@@ -252,6 +252,45 @@ func TestTuneConfig_ExplicitOverride(t *testing.T) {
 	}
 }
 
+func TestTuneConfig_ExplicitDefaultValues(t *testing.T) {
+	config := makeDefaultConfig()
+	config.TimeoutExplicit = true
+	config.ModuleThreadNumExplicit = true
+	config.MaxRetriesExplicit = true
+	config.Network.ICMPRateExplicit = true
+	config.POC.NumExplicit = true
+	session := makeTestSession(config)
+
+	ep := &EnvironmentProfile{
+		Net: NetworkProfile{
+			Env:       EnvLAN,
+			RTTMedian: 1 * time.Millisecond,
+			RTTStddev: 500 * time.Microsecond,
+			LossRate:  0.0,
+			Samples:   30,
+		},
+		System: SystemProfile{FDLimit: 65536, NumCPU: 8},
+	}
+
+	ep.TuneConfig(config, session)
+
+	if config.Timeout != 3*time.Second {
+		t.Errorf("显式默认 Timeout 被覆盖: %v", config.Timeout)
+	}
+	if config.ModuleThreadNum != 20 {
+		t.Errorf("显式默认 ModuleThreadNum 被覆盖: %d", config.ModuleThreadNum)
+	}
+	if config.MaxRetries != 3 {
+		t.Errorf("显式默认 MaxRetries 被覆盖: %d", config.MaxRetries)
+	}
+	if config.Network.ICMPRate != 0.1 {
+		t.Errorf("显式默认 ICMPRate 被覆盖: %.2f", config.Network.ICMPRate)
+	}
+	if config.POC.Num != 20 {
+		t.Errorf("显式默认 PocNum 被覆盖: %d", config.POC.Num)
+	}
+}
+
 // =============================================================================
 // 集成测试：fd limit 约束
 // =============================================================================