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vendor/github.com/bytedance/sonic/internal/rt/gcwb.go

@@ -1,5 +1,3 @@
-// +build go1.21,!go1.26
-
 /*
  * Copyright 2021 ByteDance Inc.
  *
@@ -19,18 +17,13 @@
 package rt
 
 import (
+    `os`
     `sync/atomic`
     `unsafe`
 
     `golang.org/x/arch/x86/x86asm`
 )
 
-//go:linkname GcWriteBarrier2 runtime.gcWriteBarrier2
-func GcWriteBarrier2()
-
-//go:linkname RuntimeWriteBarrier runtime.writeBarrier
-var RuntimeWriteBarrier uintptr
-
 const (
     _MaxInstr = 15
 )
@@ -83,3 +76,49 @@ func GcwbAddr() uintptr {
     }
 }
 
+// StopProfiling is used to stop traceback introduced by SIGPROF while native code is running.
+// WARN: this option is only a workaround for traceback issue (https://github.com/bytedance/sonic/issues/310),
+// and will be dropped when the issue is fixed.
+var StopProfiling = os.Getenv("SONIC_STOP_PROFILING") != ""
+
+// WARN: must be aligned with runtime.Prof
+// type Prof struct {
+//     signalLock uint32
+// 	hz int32
+// }
+
+var (
+    // // go:linkname runtimeProf runtime.prof
+    // runtimeProf Prof
+
+    // count of native-C calls
+    yieldCount uint32
+
+    // previous value of runtimeProf.hz
+    oldHz int32
+)
+
+//go:nosplit
+func MoreStack(size uintptr)
+
+func StopProf()
+
+// func StopProf() {
+//     atomic.AddUint32(&yieldCount, 1)
+//     if runtimeProf.hz != 0 {
+//         oldHz = runtimeProf.hz
+//         runtimeProf.hz = 0
+//     }
+// }
+
+func StartProf()
+
+// func StartProf() {
+//     atomic.AddUint32(&yieldCount, ^uint32(0))
+//     if yieldCount == 0 && runtimeProf.hz == 0 {
+//         if oldHz == 0 {
+//             oldHz = 100
+//         }
+//         runtimeProf.hz = oldHz
+//     }
+// }