1 files changed, 95 insertions, 0 deletions
diff --git a/test/inline_callers.go b/test/inline_callers.go
new file mode 100644
index 0000000..ee7d647
--- /dev/null
+++ b/test/inline_callers.go
@@ -0,0 +1,95 @@
+// run -gcflags=-l=4
+
+// Copyright 2017 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 main
+
+import (
+	"fmt"
+	"runtime"
+)
+
+var skip int
+var npcs int
+var pcs = make([]uintptr, 32)
+
+func f() {
+	g()
+}
+
+func g() {
+	h()
+}
+
+func h() {
+	npcs = runtime.Callers(skip, pcs)
+}
+
+func testCallers(skp int) (frames []string) {
+	skip = skp
+	f()
+	for i := 0; i < npcs; i++ {
+		fn := runtime.FuncForPC(pcs[i] - 1)
+		frames = append(frames, fn.Name())
+		if fn.Name() == "main.main" {
+			break
+		}
+	}
+	return
+}
+
+func testCallersFrames(skp int) (frames []string) {
+	skip = skp
+	f()
+	callers := pcs[:npcs]
+	ci := runtime.CallersFrames(callers)
+	for {
+		frame, more := ci.Next()
+		frames = append(frames, frame.Function)
+		if !more || frame.Function == "main.main" {
+			break
+		}
+	}
+	return
+}
+
+var expectedFrames [][]string = [][]string{
+	0: {"runtime.Callers", "main.h", "main.g", "main.f", "main.testCallers", "main.main"},
+	1: {"main.h", "main.g", "main.f", "main.testCallers", "main.main"},
+	2: {"main.g", "main.f", "main.testCallers", "main.main"},
+	3: {"main.f", "main.testCallers", "main.main"},
+	4: {"main.testCallers", "main.main"},
+	5: {"main.main"},
+}
+
+var allFrames = []string{"runtime.Callers", "main.h", "main.g", "main.f", "main.testCallersFrames", "main.main"}
+
+func same(xs, ys []string) bool {
+	if len(xs) != len(ys) {
+		return false
+	}
+	for i := range xs {
+		if xs[i] != ys[i] {
+			return false
+		}
+	}
+	return true
+}
+
+func main() {
+	for i := 0; i <= 5; i++ {
+		frames := testCallers(i)
+		expected := expectedFrames[i]
+		if !same(frames, expected) {
+			fmt.Printf("testCallers(%d):\n got %v\n want %v\n", i, frames, expected)
+		}
+
+		frames = testCallersFrames(i)
+		expected = allFrames[i:]
+		if !same(frames, expected) {
+			fmt.Printf("testCallersFrames(%d):\n got %v\n want %v\n", i, frames, expected)
+		}
+	}
+}