The following commit has been merged into the locking/kcsan branch of tip: Commit-ID: cdb9b07d8c78be63d72aba9a2686ff161ddd2099 Gitweb: https://git.kernel.org/tip/cdb9b07d8c78be63d72aba9a2686ff161ddd2099 Author: Marco Elver <[email protected]> AuthorDate: Fri, 10 Apr 2020 18:44:18 +02:00 Committer: Paul E. McKenney <[email protected]> CommitterDate: Mon, 13 Apr 2020 17:18:16 -07:00
kcsan: Make reporting aware of KCSAN tests 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 <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> --- 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 cf41d63..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; }
