1 files changed, 91 insertions, 0 deletions
diff --git a/src/cmd/internal/objabi/funcid.go b/src/cmd/internal/objabi/funcid.go
new file mode 100644
index 0000000..c2eb4d5
--- /dev/null
+++ b/src/cmd/internal/objabi/funcid.go
@@ -0,0 +1,91 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package objabi
+
+import "strings"
+
+// A FuncFlag records bits about a function, passed to the runtime.
+type FuncFlag uint8
+
+// Note: This list must match the list in runtime/symtab.go.
+const (
+	FuncFlag_TOPFRAME = 1 << iota
+	FuncFlag_SPWRITE
+	FuncFlag_ASM
+)
+
+// A FuncID identifies particular functions that need to be treated
+// specially by the runtime.
+// Note that in some situations involving plugins, there may be multiple
+// copies of a particular special runtime function.
+type FuncID uint8
+
+// Note: this list must match the list in runtime/symtab.go.
+const (
+	FuncID_normal FuncID = iota // not a special function
+	FuncID_abort
+	FuncID_asmcgocall
+	FuncID_asyncPreempt
+	FuncID_cgocallback
+	FuncID_debugCallV2
+	FuncID_gcBgMarkWorker
+	FuncID_goexit
+	FuncID_gogo
+	FuncID_gopanic
+	FuncID_handleAsyncEvent
+	FuncID_mcall
+	FuncID_morestack
+	FuncID_mstart
+	FuncID_panicwrap
+	FuncID_rt0_go
+	FuncID_runfinq
+	FuncID_runtime_main
+	FuncID_sigpanic
+	FuncID_systemstack
+	FuncID_systemstack_switch
+	FuncID_wrapper // any autogenerated code (hash/eq algorithms, method wrappers, etc.)
+)
+
+var funcIDs = map[string]FuncID{
+	"abort":              FuncID_abort,
+	"asmcgocall":         FuncID_asmcgocall,
+	"asyncPreempt":       FuncID_asyncPreempt,
+	"cgocallback":        FuncID_cgocallback,
+	"debugCallV2":        FuncID_debugCallV2,
+	"gcBgMarkWorker":     FuncID_gcBgMarkWorker,
+	"rt0_go":             FuncID_rt0_go,
+	"goexit":             FuncID_goexit,
+	"gogo":               FuncID_gogo,
+	"gopanic":            FuncID_gopanic,
+	"handleAsyncEvent":   FuncID_handleAsyncEvent,
+	"main":               FuncID_runtime_main,
+	"mcall":              FuncID_mcall,
+	"morestack":          FuncID_morestack,
+	"mstart":             FuncID_mstart,
+	"panicwrap":          FuncID_panicwrap,
+	"runfinq":            FuncID_runfinq,
+	"sigpanic":           FuncID_sigpanic,
+	"systemstack_switch": FuncID_systemstack_switch,
+	"systemstack":        FuncID_systemstack,
+
+	// Don't show in call stack but otherwise not special.
+	"deferreturn":       FuncID_wrapper,
+	"runOpenDeferFrame": FuncID_wrapper,
+	"deferCallSave":     FuncID_wrapper,
+}
+
+// Get the function ID for the named function in the named file.
+// The function should be package-qualified.
+func GetFuncID(name string, isWrapper bool) FuncID {
+	if isWrapper {
+		return FuncID_wrapper
+	}
+	if strings.HasPrefix(name, "runtime.") {
+		if id, ok := funcIDs[name[len("runtime."):]]; ok {
+			return id
+		}
+	}
+	return FuncID_normal
+}