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Kernel: Annotate all syscalls with VERIFY_PROCESS_BIG_LOCK_ACQUIRED

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Before we start disabling acquisition of the big process lock for
specific syscalls, make sure to document and assert that all the
lock is held during all syscalls.
This commit is contained in:
Brian Gianforcaro 2021-07-18 11:20:12 -07:00 • committed by Gunnar Beutner
parent 120b9bc05b
commit 9201a06027
72 changed files with 165 additions and 0 deletions
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8
Kernel/Syscalls/thread.cpp
View file

@ -18,6 +18,7 @@ namespace Kernel {
KResultOr<FlatPtr> Process::sys$create_thread(void* (*entry)(void*), Userspace<const Syscall::SC_create_thread_params*> user_params)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(thread);
Syscall::SC_create_thread_params params;
@ -91,6 +92,7 @@ KResultOr<FlatPtr> Process::sys$create_thread(void* (*entry)(void*), Userspace<c
void Process::sys$exit_thread(Userspace<void*> exit_value, Userspace<void*> stack_location, size_t stack_size)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(thread);
if (this->thread_count() == 1) {
@ -114,6 +116,7 @@ void Process::sys$exit_thread(Userspace<void*> exit_value, Userspace<void*> stac
KResultOr<FlatPtr> Process::sys$detach_thread(pid_t tid)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(thread);
auto thread = Thread::from_tid(tid);
if (!thread || thread->pid() != pid())
@ -128,6 +131,7 @@ KResultOr<FlatPtr> Process::sys$detach_thread(pid_t tid)
KResultOr<FlatPtr> Process::sys$join_thread(pid_t tid, Userspace<void**> exit_value)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(thread);
auto thread = Thread::from_tid(tid);
@ -161,6 +165,7 @@ KResultOr<FlatPtr> Process::sys$join_thread(pid_t tid, Userspace<void**> exit_va
KResultOr<FlatPtr> Process::sys$kill_thread(pid_t tid, int signal)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(thread);
if (signal < 0 || signal >= 32)
@ -182,6 +187,7 @@ KResultOr<FlatPtr> Process::sys$kill_thread(pid_t tid, int signal)
KResultOr<FlatPtr> Process::sys$set_thread_name(pid_t tid, Userspace<const char*> user_name, size_t user_name_length)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(stdio);
auto name = copy_string_from_user(user_name, user_name_length);
if (name.is_null())
@ -201,6 +207,7 @@ KResultOr<FlatPtr> Process::sys$set_thread_name(pid_t tid, Userspace<const char*
KResultOr<FlatPtr> Process::sys$get_thread_name(pid_t tid, Userspace<char*> buffer, size_t buffer_size)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(thread);
if (buffer_size == 0)
return EINVAL;
@ -221,6 +228,7 @@ KResultOr<FlatPtr> Process::sys$get_thread_name(pid_t tid, Userspace<char*> buff
KResultOr<FlatPtr> Process::sys$gettid()
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(stdio);
return Thread::current()->tid().value();
}