linux-kernel - [PATCH] scripts/decode_stacktrace.sh: Use LLVM environment variable

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Date: Fri, 15 Dec 2023 10:26:40 -0800
From: Elliot Berman <quic_eberman@...cinc.com>
To: Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers
	<ndesaulniers@...gle.com>,
        Bill Wendling <morbo@...gle.com>,
        Justin Stitt
	<justinstitt@...gle.com>,
        Manuel Traut <manut@...utronix.de>
CC: <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <llvm@...ts.linux.dev>, Elliot Berman <quic_eberman@...cinc.com>
Subject: [PATCH] scripts/decode_stacktrace.sh: Use LLVM environment
 variable

When using LLVM as the compiler, decode_stacktrace should also use
llvm-addr2line. Check if LLVM is set and add the appropriate
suffix/prefix.

Signed-off-by: Elliot Berman <quic_eberman@...cinc.com>
---
 scripts/decode_stacktrace.sh | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/scripts/decode_stacktrace.sh b/scripts/decode_stacktrace.sh
index 564c5632e1a2..189b00f4e120 100755
--- a/scripts/decode_stacktrace.sh
+++ b/scripts/decode_stacktrace.sh
@@ -16,6 +16,16 @@ elif type c++filt >/dev/null 2>&1 ; then
 	cppfilt_opts=-i
 fi
 
+if [[ "${LLVM}" == "1" ]] ; then
+	addr2line="llvm-addr2line"
+elif [[ "${LLVM}" == */ ]] ; then
+	addr2line="${LLVM}llvm-addr2line"
+elif [[ "${LLVM}" == -* ]] ; then
+	addr2line="llvm-addr2line${LLVM}"
+else
+	addr2line="${CROSS_COMPILE}addr2line"
+fi
+
 if [[ $1 == "-r" ]] ; then
 	vmlinux=""
 	basepath="auto"
@@ -169,7 +179,7 @@ parse_symbol() {
 	if [[ $aarray_support == true && "${cache[$module,$address]+isset}" == "isset" ]]; then
 		local code=${cache[$module,$address]}
 	else
-		local code=$(${CROSS_COMPILE}addr2line -i -e "$objfile" "$address" 2>/dev/null)
+		local code=$(${addr2line} -i -e "$objfile" "$address" 2>/dev/null)
 		if [[ $aarray_support == true ]]; then
 			cache[$module,$address]=$code
 		fi

---
base-commit: 3f7168591ebf7bbdb91797d02b1afaf00a4289b1
change-id: 20231214-llvm-decode-stacktrace-09538979006d

Best regards,
-- 
Elliot Berman <quic_eberman@...cinc.com>