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Kernel: Return ENOMEM in more places

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There are plenty of places in the kernel that aren't
checking if they actually got their allocation.

This fixes some of them, but definitely not all.

Fixes #3390
Fixes #3391

Also, let's make find_one_free_page() return nullptr
if it doesn't get a free index. This stops the kernel
crashing when out of memory and allows memory purging
to take place again.

Fixes #3487
This commit is contained in:
Luke 2020-09-16 18:47:47 +01:00 • committed by Andreas Kling
parent 2229b13c97
commit 68b361bd21
9 changed files with 34 additions and 12 deletions
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4
Kernel/Thread.h
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@ -433,9 +433,9 @@ public:
void set_default_signal_dispositions();
bool push_value_on_stack(FlatPtr);
u32 make_userspace_stack_for_main_thread(Vector<String> arguments, Vector<String> environment, Vector<AuxiliaryValue>);
KResultOr<u32> make_userspace_stack_for_main_thread(Vector<String> arguments, Vector<String> environment, Vector<AuxiliaryValue>);
void make_thread_specific_region(Badge<Process>);
KResult make_thread_specific_region(Badge<Process>);
unsigned syscall_count() const { return m_syscall_count; }
void did_syscall() { ++m_syscall_count; }