0ct0pu5/ladybird
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 2

Kernel: Make sys$getppid() not take the big lock

Browse source 
This only needs to access the process PPID, which is protected by the
"protected data" lock.
This commit is contained in:
Andreas Kling 2022-08-21 13:29:36 +02:00
parent 8ed06ad814
commit 18abba2c4d
Notes: sideshowbarker 2024-07-17 08:06:17 +09:00
2 changed files with 3 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
Kernel/API/Syscall.h
View file

@ -92,7 +92,7 @@ enum class NeedsBigProcessLock {
S(getpgid, NeedsBigProcessLock::Yes) \
S(getpgrp, NeedsBigProcessLock::Yes) \
S(getpid, NeedsBigProcessLock::No) \
S(getppid, NeedsBigProcessLock::Yes) \
S(getppid, NeedsBigProcessLock::No) \
S(getrandom, NeedsBigProcessLock::No) \
S(getresgid, NeedsBigProcessLock::No) \
S(getresuid, NeedsBigProcessLock::No) \

4
Kernel/Syscalls/process.cpp
View file

@ -18,9 +18,9 @@ ErrorOr<FlatPtr> Process::sys$getpid()
ErrorOr<FlatPtr> Process::sys$getppid()
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
VERIFY_NO_PROCESS_BIG_LOCK(this);
TRY(require_promise(Pledge::stdio));
return with_protected_data([](auto& protected_data) { return protected_data.ppid.value(); });
return ppid().value();
}
ErrorOr<FlatPtr> Process::sys$get_process_name(Userspace<char*> buffer, size_t buffer_size)