From: paulmck@kernel.org
To: linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com,
kernel-team@fb.com, mingo@kernel.org
Cc: elver@google.com, andreyknvl@google.com, glider@google.com,
dvyukov@google.com, cai@lca.pw, boqun.feng@gmail.com,
"Paul E . McKenney" <paulmck@kernel.org>
Subject: [PATCH v4 tip/core/rcu 15/15] kcsan: Make reporting aware of KCSAN tests
Date: Wed, 15 Apr 2020 11:34:11 -0700 [thread overview]
Message-ID: <20200415183411.12368-15-paulmck@kernel.org> (raw)
In-Reply-To: <20200415183343.GA12265@paulmck-ThinkPad-P72>
From: Marco Elver <elver@google.com>
Reporting hides KCSAN runtime functions in the stack trace, with
filtering done based on function names. Currently this included all
functions (or modules) that would match "kcsan_". Make the filter aware
of KCSAN tests, which contain "kcsan_test", and are no longer skipped in
the report.
This is in preparation for adding a KCSAN test module.
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
kernel/kcsan/report.c | 30 +++++++++++++++++++++++-------
1 file changed, 23 insertions(+), 7 deletions(-)
diff --git a/kernel/kcsan/report.c b/kernel/kcsan/report.c
index cf41d63d..ac5f834 100644
--- a/kernel/kcsan/report.c
+++ b/kernel/kcsan/report.c
@@ -262,16 +262,32 @@ static const char *get_thread_desc(int task_id)
static int get_stack_skipnr(const unsigned long stack_entries[], int num_entries)
{
char buf[64];
- int len;
- int skip = 0;
+ char *cur;
+ int len, skip;
- for (; skip < num_entries; ++skip) {
+ for (skip = 0; skip < num_entries; ++skip) {
len = scnprintf(buf, sizeof(buf), "%ps", (void *)stack_entries[skip]);
- if (!strnstr(buf, "csan_", len) &&
- !strnstr(buf, "tsan_", len) &&
- !strnstr(buf, "_once_size", len))
- break;
+
+ /* Never show tsan_* or {read,write}_once_size. */
+ if (strnstr(buf, "tsan_", len) ||
+ strnstr(buf, "_once_size", len))
+ continue;
+
+ cur = strnstr(buf, "kcsan_", len);
+ if (cur) {
+ cur += sizeof("kcsan_") - 1;
+ if (strncmp(cur, "test", sizeof("test") - 1))
+ continue; /* KCSAN runtime function. */
+ /* KCSAN related test. */
+ }
+
+ /*
+ * No match for runtime functions -- @skip entries to skip to
+ * get to first frame of interest.
+ */
+ break;
}
+
return skip;
}
--
2.9.5
next prev parent reply other threads:[~2020-04-15 19:09 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-15 18:33 [PATCH kcsan 0/15] KCSAN updates for v5.8 Paul E. McKenney
2020-04-15 18:33 ` [PATCH v4 tip/core/rcu 01/15] kcsan: Add option to allow watcher interruptions paulmck
2020-04-15 18:33 ` [PATCH v4 tip/core/rcu 02/15] kcsan: Add option for verbose reporting paulmck
2020-04-15 18:33 ` [PATCH v4 tip/core/rcu 03/15] kcsan: Add current->state to implicitly atomic accesses paulmck
2020-04-15 18:34 ` [PATCH v4 tip/core/rcu 04/15] kcsan: Fix a typo in a comment paulmck
2020-04-15 18:34 ` [PATCH v4 tip/core/rcu 05/15] kcsan: Update Documentation/dev-tools/kcsan.rst paulmck
2020-04-15 18:34 ` [PATCH v4 tip/core/rcu 06/15] kcsan: Update API documentation in kcsan-checks.h paulmck
2020-04-15 18:34 ` [PATCH v4 tip/core/rcu 07/15] kcsan: Introduce report access_info and other_info paulmck
2020-04-15 18:34 ` [PATCH v4 tip/core/rcu 08/15] kcsan: Avoid blocking producers in prepare_report() paulmck
2020-04-15 18:34 ` [PATCH v4 tip/core/rcu 09/15] kcsan: Add support for scoped accesses paulmck
2020-04-15 18:34 ` [PATCH v4 tip/core/rcu 10/15] objtool, kcsan: Add explicit check functions to uaccess whitelist paulmck
2020-04-15 18:34 ` [PATCH v4 tip/core/rcu 11/15] kcsan: Introduce scoped ASSERT_EXCLUSIVE macros paulmck
2020-04-15 18:34 ` [PATCH v4 tip/core/rcu 12/15] kcsan: Move kcsan_{disable,enable}_current() to kcsan-checks.h paulmck
2020-04-15 18:34 ` [PATCH v4 tip/core/rcu 13/15] kcsan: Change data_race() to no longer require marking racing accesses paulmck
2020-04-15 18:34 ` [PATCH v4 tip/core/rcu 14/15] kcsan: Fix function matching in report paulmck
2020-04-15 18:34 ` paulmck [this message]
2020-04-15 18:49 ` [PATCH lkmm tip/core/rcu 01/10] tools/memory-model: Add recent references paulmck
2020-04-15 18:49 ` [PATCH lkmm tip/core/rcu 02/10] tools/memory-model: Fix "conflict" definition paulmck
2020-04-15 18:49 ` [PATCH lkmm tip/core/rcu 03/10] Documentation: LKMM: Move MP+onceassign+derefonce to new litmus-tests/rcu/ paulmck
2020-04-15 18:49 ` [PATCH lkmm tip/core/rcu 04/10] Documentation: LKMM: Add litmus test for RCU GP guarantee where updater frees object paulmck
2020-04-15 18:49 ` [PATCH lkmm tip/core/rcu 05/10] Documentation: LKMM: Add litmus test for RCU GP guarantee where reader stores paulmck
2020-04-15 18:49 ` [PATCH lkmm tip/core/rcu 06/10] MAINTAINERS: Update maintainers for new Documentaion/litmus-tests/ paulmck
2020-04-15 21:39 ` Joe Perches
2020-04-16 0:17 ` Paul E. McKenney
2020-04-16 1:46 ` Joe Perches
2020-04-16 10:07 ` Paul E. McKenney
2020-04-15 18:49 ` [PATCH lkmm tip/core/rcu 07/10] tools/memory-model: Add an exception for limitations on _unless() family paulmck
2020-04-15 18:49 ` [PATCH lkmm tip/core/rcu 08/10] Documentation/litmus-tests: Introduce atomic directory paulmck
2020-04-15 18:49 ` [PATCH lkmm tip/core/rcu 09/10] Documentation/litmus-tests/atomic: Add a test for atomic_set() paulmck
2020-04-15 18:49 ` [PATCH lkmm tip/core/rcu 10/10] Documentation/litmus-tests/atomic: Add a test for smp_mb__after_atomic() paulmck
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