From b812848a0eeb7c9e94199b26c852d637e5eb8aa3 Mon Sep 17 00:00:00 2001
From: Balazs Gerofi <bgerofi@riken.jp>
Date: Tue, 24 Jan 2017 14:47:10 +0900
Subject: [PATCH] eclair-dump-backtrace.exp: handle user space threads

---
 arch/x86/tools/eclair-dump-backtrace.exp.in | 39 +++++++++++++++++----
 1 file changed, 33 insertions(+), 6 deletions(-)

diff --git a/arch/x86/tools/eclair-dump-backtrace.exp.in b/arch/x86/tools/eclair-dump-backtrace.exp.in
index 7ac9b771..f0555b5f 100755
--- a/arch/x86/tools/eclair-dump-backtrace.exp.in
+++ b/arch/x86/tools/eclair-dump-backtrace.exp.in
@@ -8,19 +8,36 @@ set state "init"
 set thread_id 0
 
 expect {
+	"in ?? ()" {
+		switch -- $state {
+			"thread_chosen" {
+				set state "thread_skip"
+			}
+			"thread_bt" {
+				set state "thread_skip"
+			}
+		}
+
+		exp_continue
+	}
 	"(eclair) " {
 		switch -- $state {
 			"init" {
-				set state "threads"
+				set state "threads_list"
 				send "info threads\r"
 			}
-			"threads" {
+			"threads_list" {
 				incr thread_id
-				set state "thread_bt"
+				set state "thread_chosen"
 				send "thread $thread_id\r"
 			}
-			"thread_bt" {
-				set state "threads"
+			"thread_skip" {
+				incr thread_id
+				set state "thread_chosen"
+				send "thread $thread_id\r"
+			}
+			"thread_chosen" {
+				set state "thread_bt"
 				send "bt\r"
 			}
 		}
@@ -28,7 +45,17 @@ expect {
 		exp_continue
 	}
 	"Type <return> to continue, or q <return> to quit" { 
-		send "\r"
+		switch -- $state {
+			"threads_list" {
+				send "\r"
+			}
+			"thread_bt" {
+				send "\r"
+			}
+			"thread_skip" {
+				send "q\r"
+			}
+		}
 		exp_continue 
 	}
 	" not known." {