mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-01-23 00:20:52 -05:00
kernel: make kcov_common_handle consider the current context
kcov_common_handle is a method that is used to obtain a "default" KCOV remote handle of the current process. The handle can later be passed to kcov_remote_start in order to collect coverage for the processing that is initiated by one process, but done in another. For details see Documentation/dev-tools/kcov.rst and comments in kernel/kcov.c. Presently, if kcov_common_handle is called in an IRQ context, it will return a handle for the interrupted process. This may lead to unreliable and incorrect coverage collection. Adjust the behavior of kcov_common_handle in the following way. If it is called in a task context, return the common handle for the currently running task. Otherwise, return 0. Signed-off-by: Aleksandr Nogikh <nogikh@google.com> Reviewed-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
parent
0e8c266c59
commit
b08e84da20
1 changed files with 2 additions and 0 deletions
|
@ -1023,6 +1023,8 @@ EXPORT_SYMBOL(kcov_remote_stop);
|
|||
/* See the comment before kcov_remote_start() for usage details. */
|
||||
u64 kcov_common_handle(void)
|
||||
{
|
||||
if (!in_task())
|
||||
return 0;
|
||||
return current->kcov_handle;
|
||||
}
|
||||
EXPORT_SYMBOL(kcov_common_handle);
|
||||
|
|
Loading…
Reference in a new issue