linux-kernel - [PATCH tip/core/rcu 04/30] rcu: Provide debug symbols and line numbers in KCSAN runs

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Message-Id: <20200214235607.13749-4-paulmck@kernel.org>
Date:   Fri, 14 Feb 2020 15:55:41 -0800
From:   paulmck@...nel.org
To:     rcu@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel-team@...com, mingo@...nel.org,
        jiangshanlai@...il.com, dipankar@...ibm.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
        fweisbec@...il.com, oleg@...hat.com, joel@...lfernandes.org,
        "Paul E. McKenney" <paulmck@...nel.org>
Subject: [PATCH tip/core/rcu 04/30] rcu: Provide debug symbols and line numbers in KCSAN runs

From: "Paul E. McKenney" <paulmck@...nel.org>

This commit adds "-g -fno-omit-frame-pointer" to ease interpretation
of KCSAN output, but only for CONFIG_KCSAN=y kerrnels.

Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 kernel/rcu/Makefile | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/rcu/Makefile b/kernel/rcu/Makefile
index 82d5fba..f91f2c2 100644
--- a/kernel/rcu/Makefile
+++ b/kernel/rcu/Makefile
@@ -3,6 +3,10 @@
 # and is generally not a function of system call inputs.
 KCOV_INSTRUMENT := n
 
+ifeq ($(CONFIG_KCSAN),y)
+KBUILD_CFLAGS += -g -fno-omit-frame-pointer
+endif
+
 obj-y += update.o sync.o
 obj-$(CONFIG_TREE_SRCU) += srcutree.o
 obj-$(CONFIG_TINY_SRCU) += srcutiny.o
-- 
2.9.5