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Kernel: Disable big process lock for sys$gettid()

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This syscall reads a read only value from the current thread, and hence
has no need for the big process lock.
This commit is contained in:
Brian Gianforcaro 2021-07-18 11:33:35 -07:00 • committed by Gunnar Beutner
parent 638598b15d
commit 5c10fb4007
2 changed files with 2 additions and 2 deletions
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2
Kernel/API/Syscall.h
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@ -126,7 +126,7 @@ enum class NeedsBigProcessLock {
S(getsockopt, NeedsBigProcessLock::Yes) \ S(getsockopt, NeedsBigProcessLock::Yes) \
S(setsockopt, NeedsBigProcessLock::Yes) \ S(setsockopt, NeedsBigProcessLock::Yes) \
S(create_thread, NeedsBigProcessLock::Yes) \ S(create_thread, NeedsBigProcessLock::Yes) \
S(gettid, NeedsBigProcessLock::Yes) \ S(gettid, NeedsBigProcessLock::No) \
S(rename, NeedsBigProcessLock::Yes) \ S(rename, NeedsBigProcessLock::Yes) \
S(ftruncate, NeedsBigProcessLock::Yes) \ S(ftruncate, NeedsBigProcessLock::Yes) \
S(exit_thread, NeedsBigProcessLock::Yes) \ S(exit_thread, NeedsBigProcessLock::Yes) \

2
Kernel/Syscalls/thread.cpp
View file

@ -228,7 +228,7 @@ KResultOr<FlatPtr> Process::sys$get_thread_name(pid_t tid, Userspace<char*> buff
KResultOr<FlatPtr> Process::sys$gettid() KResultOr<FlatPtr> Process::sys$gettid()
{ {
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this) VERIFY_NO_PROCESS_BIG_LOCK(this)
REQUIRE_PROMISE(stdio); REQUIRE_PROMISE(stdio);
return Thread::current()->tid().value(); return Thread::current()->tid().value();
} }