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kcsan: Make reporting aware of KCSAN tests

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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>
This commit is contained in:
Marco Elver 2020-04-10 18:44:18 +02:00 committed by Paul E. McKenney
parent f770ed10a9
commit cdb9b07d8c
1 changed files with 23 additions and 7 deletions
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30
kernel/kcsan/report.c
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@ -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;
}