LadybirdBrowser/ladybird
1
1
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2024-11-11 01:06:01 +03:00
Code Issues Packages Projects Releases Wiki Activity

Kernel: Fix LOCK_DEBUG feature to work again

Browse Source 
- UBSAN detected cases where we were calling thread->holding_lock(..)
  but current_thread was nullptr.

- Fix Lock::force_unlock_if_locked to not pass the correct ref delta to
  holding_lock(..).
This commit is contained in:
Brian Gianforcaro 2021-04-24 14:16:31 -07:00 committed by Andreas Kling
parent 35c0a6c54d
commit 7481789eac
Notes: sideshowbarker 2024-07-18 19:07:58 +09:00 
Author: https://github.com/bgianfo
Commit: https://github.com/SerenityOS/serenity/commit/7481789eace
Pull-request: https://github.com/SerenityOS/serenity/pull/6601
1 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Kernel/Lock.cpp
View File

@ -53,7 +53,9 @@ void Lock::lock(Mode mode)
VERIFY(m_times_locked == 0);
m_times_locked++;
#if LOCK_DEBUG
current_thread->holding_lock(*this, 1, file, line);
if (current_thread) {
current_thread->holding_lock(*this, 1, file, line);
}
#endif
m_queue.should_block(true);
m_lock.store(false, AK::memory_order_release);
@ -165,7 +167,9 @@ void Lock::unlock()
}
#if LOCK_DEBUG
current_thread->holding_lock(*this, -1);
if (current_thread) {
current_thread->holding_lock(*this, -1);
}
#endif
m_lock.store(false, AK::memory_order_release);
@ -201,7 +205,7 @@ auto Lock::force_unlock_if_locked(u32& lock_count_to_restore) -> Mode
dbgln_if(LOCK_RESTORE_DEBUG, "Lock::force_unlock_if_locked @ {}: unlocking exclusive with lock count: {}", this, m_times_locked);
#if LOCK_DEBUG
m_holder->holding_lock(*this, -(int)lock_count_to_restore);
m_holder->holding_lock(*this, -(int)m_times_locked);
#endif
m_holder = nullptr;
VERIFY(m_times_locked > 0);