[tip:x86/urgent] tools/decode_stacktrace.sh: Fix address line detection on x86

[tip-bot for Josh Poimboeuf]

Commit-ID:  8e8d8725d46d93ceffd3e708d905bc101a1905b5
Gitweb:     http://git.kernel.org/tip/8e8d8725d46d93ceffd3e708d905bc101a1905b5
Author:     Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
AuthorDate: Mon, 28 Nov 2016 17:06:35 -0600
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 29 Nov 2016 08:10:05 +0100

tools/decode_stacktrace.sh: Fix address line detection on x86

Kirill reported that the decode_stacktrace.sh script was broken by the
following commit:

  bb5e5ce545f2 ("x86/dumpstack: Remove kernel text addresses from stack dump")

Fix it by updating the per-line absolute address check to also check for
function-based address lines like the following:

  write_sysrq_trigger+0x51/0x60

I didn't remove the check for absolute addresses because it's still
needed for ARM.

Reported-by: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx>
Tested-by: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx>
Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Cc: Konstantin Khlebnikov <koct9i@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Fixes: bb5e5ce545f2 ("x86/dumpstack: Remove kernel text addresses from stack dump")
Link: 20161128230635.4n2ofgawltgexgcg@treble">http://lkml.kernel.org/r/20161128230635.4n2ofgawltgexgcg@treble
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 scripts/decode_stacktrace.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/decode_stacktrace.sh b/scripts/decode_stacktrace.sh
index c332684..5206d99 100755
--- a/scripts/decode_stacktrace.sh
+++ b/scripts/decode_stacktrace.sh
@@ -139,7 +139,8 @@ handle_line() {
 
 while read line; do
 	# Let's see if we have an address in the line
-	if [[ $line =~ \[\<([^]]+)\>\]  ]]; then
+	if [[ $line =~ \[\<([^]]+)\>\] ]] ||
+	   [[ $line =~ [^+\ ]+\+0x[0-9a-f]+/0x[0-9a-f]+ ]]; then
 		# Translate address to line numbers
 		handle_line "$line"
 	# Is it a code line?