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Kernel: Use TRY() in sys$fork()

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There's a lot of work to do on improving error propagation in the
fork system call. This just scratches the surface.
This commit is contained in:
Andreas Kling 2021-09-05 16:15:55 +02:00
parent 29bafec43b
commit f605cd04b6
1 changed files with 4 additions and 14 deletions
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18
Kernel/Syscalls/fork.cpp
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@ -18,15 +18,11 @@ KResultOr<FlatPtr> Process::sys$fork(RegisterState& regs)
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
REQUIRE_PROMISE(proc);
RefPtr<Thread> child_first_thread;
auto child_or_error = Process::try_create(child_first_thread, m_name, uid(), gid(), pid(), m_is_kernel_process, m_cwd, m_executable, m_tty, this);
if (child_or_error.is_error())
return child_or_error.error();
auto child = child_or_error.release_value();
auto child = TRY(Process::try_create(child_first_thread, m_name, uid(), gid(), pid(), m_is_kernel_process, m_cwd, m_executable, m_tty, this));
child->m_veil_state = m_veil_state;
child->m_unveiled_paths = m_unveiled_paths.deep_copy();
if (auto result = child->m_fds.try_clone(m_fds); result.is_error())
return result.error();
TRY(child->m_fds.try_clone(m_fds));
child->m_pg = m_pg;
@ -97,14 +93,8 @@ KResultOr<FlatPtr> Process::sys$fork(RegisterState& regs)
SpinlockLocker lock(address_space().get_lock());
for (auto& region : address_space().regions()) {
dbgln_if(FORK_DEBUG, "fork: cloning Region({}) '{}' @ {}", region, region->name(), region->vaddr());
auto maybe_region_clone = region->try_clone();
if (maybe_region_clone.is_error()) {
dbgln("fork: Cannot clone region, insufficient memory");
// TODO: tear down new process?
return maybe_region_clone.error();
}
auto* child_region = child->address_space().add_region(maybe_region_clone.release_value());
auto region_clone = TRY(region->try_clone());
auto* child_region = child->address_space().add_region(move(region_clone));
if (!child_region) {
dbgln("fork: Cannot add region, insufficient memory");
// TODO: tear down new process?