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Kernel: Replace KResult and KResultOr<T> with Error and ErrorOr<T>

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We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace!
This was a slightly tedious refactoring that took a long time, so it's
not unlikely that some bugs crept in.

Nevertheless, it does pass basic functionality testing, and it's just
real nice to finally see the same pattern in all contexts. :^)
This commit is contained in:
Andreas Kling 2021-11-08 00:51:39 +01:00
parent 7ee10c6926
commit 79fa9765ca
262 changed files with 2415 additions and 2600 deletions
Download patch file Download diff file Expand all files Collapse all files

28
Kernel/Syscalls/ptrace.cpp
View file

@ -16,7 +16,7 @@
namespace Kernel {
static KResultOr<u32> handle_ptrace(const Kernel::Syscall::SC_ptrace_params& params, Process& caller)
static ErrorOr<u32> handle_ptrace(const Kernel::Syscall::SC_ptrace_params& params, Process& caller)
{
SpinlockLocker scheduler_lock(g_scheduler_lock);
if (params.request == PT_TRACE_ME) {
@ -24,7 +24,7 @@ static KResultOr<u32> handle_ptrace(const Kernel::Syscall::SC_ptrace_params& par
return EBUSY;
caller.set_wait_for_tracer_at_next_execve(true);
return KSuccess;
return 0;
}
// FIXME: PID/TID BUG
@ -57,7 +57,7 @@ static KResultOr<u32> handle_ptrace(const Kernel::Syscall::SC_ptrace_params& par
if (peer->state() != Thread::State::Stopped) {
peer->send_signal(SIGSTOP, &caller);
}
return KSuccess;
return 0;
}
auto* tracer = peer_process.tracer();
@ -126,7 +126,8 @@ static KResultOr<u32> handle_ptrace(const Kernel::Syscall::SC_ptrace_params& par
case PT_POKE:
if (!Memory::is_user_address(VirtualAddress { params.addr }))
return EFAULT;
return peer->process().poke_user_data(Userspace<u32*> { (FlatPtr)params.addr }, params.data);
TRY(peer->process().poke_user_data(Userspace<u32*> { (FlatPtr)params.addr }, params.data));
return 0;
case PT_PEEKDEBUG: {
Kernel::Syscall::SC_ptrace_peek_params peek_params {};
@ -136,22 +137,23 @@ static KResultOr<u32> handle_ptrace(const Kernel::Syscall::SC_ptrace_params& par
break;
}
case PT_POKEDEBUG:
return peer->poke_debug_register(reinterpret_cast<uintptr_t>(params.addr), params.data);
TRY(peer->poke_debug_register(reinterpret_cast<uintptr_t>(params.addr), params.data));
return 0;
default:
return EINVAL;
}
return KSuccess;
return 0;
}
KResultOr<FlatPtr> Process::sys$ptrace(Userspace<const Syscall::SC_ptrace_params*> user_params)
ErrorOr<FlatPtr> Process::sys$ptrace(Userspace<const Syscall::SC_ptrace_params*> user_params)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(ptrace);
auto params = TRY(copy_typed_from_user(user_params));
auto result = handle_ptrace(params, *this);
return result.is_error() ? result.error().error() : result.value();
return result.is_error() ? result.error().code() : result.value();
}
/**
@ -164,7 +166,7 @@ bool Process::has_tracee_thread(ProcessID tracer_pid)
return false;
}
KResultOr<u32> Process::peek_user_data(Userspace<const u32*> address)
ErrorOr<u32> Process::peek_user_data(Userspace<const u32*> address)
{
// This function can be called from the context of another
// process that called PT_PEEK
@ -174,7 +176,7 @@ KResultOr<u32> Process::peek_user_data(Userspace<const u32*> address)
return data;
}
KResult Process::poke_user_data(Userspace<u32*> address, u32 data)
ErrorOr<void> Process::poke_user_data(Userspace<u32*> address, u32 data)
{
Memory::VirtualRange range = { VirtualAddress(address), sizeof(u32) };
auto* region = address_space().find_region_containing(range);
@ -204,7 +206,7 @@ KResult Process::poke_user_data(Userspace<u32*> address, u32 data)
return copy_to_user(address, &data);
}
KResultOr<u32> Thread::peek_debug_register(u32 register_index)
ErrorOr<u32> Thread::peek_debug_register(u32 register_index)
{
u32 data;
switch (register_index) {
@ -232,7 +234,7 @@ KResultOr<u32> Thread::peek_debug_register(u32 register_index)
return data;
}
KResult Thread::poke_debug_register(u32 register_index, u32 data)
ErrorOr<void> Thread::poke_debug_register(u32 register_index, u32 data)
{
switch (register_index) {
case 0:
@ -253,7 +255,7 @@ KResult Thread::poke_debug_register(u32 register_index, u32 data)
default:
return EINVAL;
}
return KSuccess;
return {};
}
}