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-rw-r--r--test/fixedbugs/issue7690.go49
1 files changed, 49 insertions, 0 deletions
diff --git a/test/fixedbugs/issue7690.go b/test/fixedbugs/issue7690.go
new file mode 100644
index 0000000..fea2aa1
--- /dev/null
+++ b/test/fixedbugs/issue7690.go
@@ -0,0 +1,49 @@
+// run
+
+// Copyright 2014 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.
+
+// issue 7690 - Stack and other routines did not back up initial PC
+// into CALL instruction, instead reporting line number of next instruction,
+// which might be on a different line.
+
+package main
+
+import (
+ "bytes"
+ "regexp"
+ "runtime"
+ "strconv"
+)
+
+func main() {
+ buf1 := make([]byte, 1000)
+ buf2 := make([]byte, 1000)
+
+ runtime.Stack(buf1, false) // CALL is last instruction on this line
+ n := runtime.Stack(buf2, false) // CALL is followed by load of result from stack
+
+ buf1 = buf1[:bytes.IndexByte(buf1, 0)]
+ buf2 = buf2[:n]
+
+ re := regexp.MustCompile(`(?m)^main\.main\(\)\n.*/issue7690.go:([0-9]+)`)
+ m1 := re.FindStringSubmatch(string(buf1))
+ if m1 == nil {
+ println("BUG: cannot find main.main in first trace")
+ return
+ }
+ m2 := re.FindStringSubmatch(string(buf2))
+ if m2 == nil {
+ println("BUG: cannot find main.main in second trace")
+ return
+ }
+
+ n1, _ := strconv.Atoi(m1[1])
+ n2, _ := strconv.Atoi(m2[1])
+ if n1+1 != n2 {
+ println("BUG: expect runtime.Stack on back to back lines, have", n1, n2)
+ println(string(buf1))
+ println(string(buf2))
+ }
+}