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Kernel: Make sure we free the thread stack on thread exit

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This adds two new arguments to the thread_exit system call which let
a thread unmap an arbitrary VM range on thread exit. LibPthread
uses this functionality to unmap the thread stack.

Fixes #7267.
This commit is contained in:
Gunnar Beutner 2021-05-28 11:20:22 +02:00 • committed by Andreas Kling
parent 95c2166ca9
commit 42d667645d
4 changed files with 22 additions and 9 deletions
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2
Kernel/Process.h
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@ -379,7 +379,7 @@ public:
KResultOr<int> sys$sched_setparam(pid_t pid, Userspace<const struct sched_param*>);
KResultOr<int> sys$sched_getparam(pid_t pid, Userspace<struct sched_param*>);
KResultOr<int> sys$create_thread(void* (*)(void*), Userspace<const Syscall::SC_create_thread_params*>);
[[noreturn]] void sys$exit_thread(Userspace<void*>);
[[noreturn]] void sys$exit_thread(Userspace<void*>, Userspace<void*>, size_t);
KResultOr<int> sys$join_thread(pid_t tid, Userspace<void**> exit_value);
KResultOr<int> sys$detach_thread(pid_t tid);
KResultOr<int> sys$set_thread_name(pid_t tid, Userspace<const char*> buffer, size_t buffer_size);