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kunit: ubsan integration

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Integrates UBSAN into the KUnit testing framework. It fails KUnit tests
whenever it reports undefined behavior.

When CONFIG_KUNIT=n, nothing is printed or even formatted, so this has
no behavioral impact outside of tests.

kunit_fail_current_test() effectively does a pr_err() as well, so
there's some slight duplication, but it also ensures an error is
recorded in the debugfs entry for the running KUnit test.

Print a shorter version of the message to make it less spammy.

Co-developed-by: Daniel Latypov <dlatypov@google.com>
Signed-off-by: Daniel Latypov <dlatypov@google.com>
Signed-off-by: Uriel Guajardo <urielguajardo@google.com>
Reviewed-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Uriel Guajardo 2021-04-02 14:21:31 -07:00 committed by Shuah Khan
parent b0d4adaf3b
commit 1195505f5d
1 changed files with 3 additions and 0 deletions
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3
lib/ubsan.c
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@ -14,6 +14,7 @@
#include <linux/types.h> #include <linux/types.h>
#include <linux/sched.h> #include <linux/sched.h>
#include <linux/uaccess.h> #include <linux/uaccess.h>
#include <kunit/test-bug.h>
#include "ubsan.h" #include "ubsan.h"
@ -141,6 +142,8 @@ static void ubsan_prologue(struct source_location *loc, const char *reason)
"========================================\n"); "========================================\n");
pr_err("UBSAN: %s in %s:%d:%d\n", reason, loc->file_name, pr_err("UBSAN: %s in %s:%d:%d\n", reason, loc->file_name,
loc->line & LINE_MASK, loc->column & COLUMN_MASK); loc->line & LINE_MASK, loc->column & COLUMN_MASK);
kunit_fail_current_test("%s in %s", reason, loc->file_name);
} }
static void ubsan_epilogue(void) static void ubsan_epilogue(void)