From 3e00ee8e994147c2dce70bc785fb6fb70f3ecd41 Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Thu, 21 May 2026 17:58:01 +0300
Subject: j7 add futex kind and aggregate-only defaults

---
 internal/generate/classify.go      | 13 +++++++++++++
 internal/generate/classify_test.go | 25 +++++++++++++++++++++++++
 internal/generate/codegen_test.go  |  4 +++-
 internal/generate/kindregistry.go  |  1 +
 4 files changed, 42 insertions(+), 1 deletion(-)

(limited to 'internal/generate')

diff --git a/internal/generate/classify.go b/internal/generate/classify.go
index 3fa8d23..ffac1b3 100644
--- a/internal/generate/classify.go
+++ b/internal/generate/classify.go
@@ -37,6 +37,7 @@ const (
 	KindSysVOp
 	KindProc
 	KindBpf
+	KindFutex
 )
 
 func (k TracepointKind) MetadataName() string {
@@ -103,6 +104,8 @@ func (k TracepointKind) MetadataName() string {
 		return "proc"
 	case KindBpf:
 		return "bpf"
+	case KindFutex:
+		return "futex"
 	default:
 		return "none"
 	}
@@ -410,6 +413,16 @@ func classifyNameOnly(name string) (ClassificationResult, bool) {
 		return ClassificationResult{Kind: KindProc}, true
 	case "sys_enter_bpf":
 		return ClassificationResult{Kind: KindBpf}, true
+	case "sys_enter_futex":
+		return ClassificationResult{Kind: KindFutex}, true
+	case "sys_enter_futex_wait":
+		return ClassificationResult{Kind: KindFutex}, true
+	case "sys_enter_futex_wake":
+		return ClassificationResult{Kind: KindFutex}, true
+	case "sys_enter_futex_requeue":
+		return ClassificationResult{Kind: KindFutex}, true
+	case "sys_enter_futex_waitv":
+		return ClassificationResult{Kind: KindFutex}, true
 	case "sys_enter_pidfd_send_signal":
 		return ClassificationResult{Kind: KindFd}, true
 	case "sys_enter_kexec_file_load":
diff --git a/internal/generate/classify_test.go b/internal/generate/classify_test.go
index 07445ec..c3c7676 100644
--- a/internal/generate/classify_test.go
+++ b/internal/generate/classify_test.go
@@ -780,6 +780,31 @@ func TestClassifyL7NameOnlyKinds(t *testing.T) {
 	}
 }
 
+func TestClassifyJ7NameOnlyKinds(t *testing.T) {
+	tests := []string{
+		"sys_enter_futex",
+		"sys_enter_futex_wait",
+		"sys_enter_futex_wake",
+		"sys_enter_futex_requeue",
+		"sys_enter_futex_waitv",
+	}
+
+	for _, name := range tests {
+		t.Run(name, func(t *testing.T) {
+			r := ClassifyFormat(&Format{
+				Name: name,
+				ExternalFields: []Field{
+					{Type: "long", Name: "__syscall_nr"},
+					{Type: "long", Name: "arg0"},
+				},
+			})
+			if r.Kind != KindFutex {
+				t.Fatalf("%s: got kind %d, want KindFutex", name, r.Kind)
+			}
+		})
+	}
+}
+
 func TestClassify67NameOnlyKinds(t *testing.T) {
 	tests := []struct {
 		name string
diff --git a/internal/generate/codegen_test.go b/internal/generate/codegen_test.go
index 220d77e..cf75324 100644
--- a/internal/generate/codegen_test.go
+++ b/internal/generate/codegen_test.go
@@ -634,6 +634,7 @@ func TestGenerateAllEventTypes(t *testing.T) {
 		{KindSysVOp, "ENTER_NULL_EVENT", "EXIT_NULL_EVENT"},
 		{KindProc, "ENTER_NULL_EVENT", "EXIT_NULL_EVENT"},
 		{KindBpf, "ENTER_NULL_EVENT", "EXIT_NULL_EVENT"},
+		{KindFutex, "ENTER_NULL_EVENT", "EXIT_NULL_EVENT"},
 	}
 
 	for _, tt := range tests {
@@ -682,6 +683,7 @@ func TestEventStructNames(t *testing.T) {
 		{KindSysVOp, "null_event"},
 		{KindProc, "null_event"},
 		{KindBpf, "null_event"},
+		{KindFutex, "null_event"},
 	}
 
 	for _, tt := range tests {
@@ -700,7 +702,7 @@ func TestEnterReject(t *testing.T) {
 		t.Error("KindNone should be enter-rejected")
 	}
 
-	accepted := []TracepointKind{KindFd, KindOpen, KindMqOpen, KindExec, KindPathname, KindName, KindFcntl, KindNull, KindDup3, KindOpenByHandleAt, KindSocket, KindSocketpair, KindAccept, KindPipe, KindEventfd, KindPidfd, KindEpollCtl, KindTwoFd, KindPoll, KindMem, KindSleep, KindKeyctl, KindPtrace, KindPerfOpen, KindSeccomp, KindModule, KindSysVId, KindSysVOp, KindProc, KindBpf}
+	accepted := []TracepointKind{KindFd, KindOpen, KindMqOpen, KindExec, KindPathname, KindName, KindFcntl, KindNull, KindDup3, KindOpenByHandleAt, KindSocket, KindSocketpair, KindAccept, KindPipe, KindEventfd, KindPidfd, KindEpollCtl, KindTwoFd, KindPoll, KindMem, KindSleep, KindKeyctl, KindPtrace, KindPerfOpen, KindSeccomp, KindModule, KindSysVId, KindSysVOp, KindProc, KindBpf, KindFutex}
 	for _, k := range accepted {
 		if isEnterRejected(k) {
 			t.Errorf("kind %d should NOT be enter-rejected", k)
diff --git a/internal/generate/kindregistry.go b/internal/generate/kindregistry.go
index f78bf6f..03977a4 100644
--- a/internal/generate/kindregistry.go
+++ b/internal/generate/kindregistry.go
@@ -47,6 +47,7 @@ var kindRegistry = map[TracepointKind]kindMeta{
 	KindSysVOp:         {structName: "null_event", enterAccepted: true},
 	KindProc:           {structName: "null_event", enterAccepted: true},
 	KindBpf:            {structName: "null_event", enterAccepted: true},
+	KindFutex:          {structName: "null_event", enterAccepted: true},
 	// KindNone is intentionally absent: it represents "unclassified" and is
 	// never enter-accepted. lookupKind returns the zero kindMeta (enterAccepted=false)
 	// for any unregistered kind, so KindNone is implicitly rejected.
-- 
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