mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-14 01:04:38 +03:00
2a78bf8596
The Process::Handler type has KResultOr<FlatPtr> as its return type. Using a different return type with an equally-sized template parameter sort of works but breaks once that condition is no longer true, e.g. for KResultOr<int> on x86_64. Ideally the syscall handlers would also take FlatPtrs as their args so we can get rid of the reinterpret_cast for the function pointer but I didn't quite feel like cleaning that up as well.
130 lines
3.7 KiB
C++
130 lines
3.7 KiB
C++
/*
|
|
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <Kernel/CoreDump.h>
|
|
#include <Kernel/FileSystem/FileDescription.h>
|
|
#include <Kernel/FileSystem/VirtualFileSystem.h>
|
|
#include <Kernel/PerformanceManager.h>
|
|
#include <Kernel/Process.h>
|
|
#include <Kernel/Time/TimeManagement.h>
|
|
|
|
namespace Kernel {
|
|
|
|
bool g_profiling_all_threads;
|
|
PerformanceEventBuffer* g_global_perf_events;
|
|
u64 g_profiling_event_mask;
|
|
|
|
KResultOr<FlatPtr> Process::sys$profiling_enable(pid_t pid, u64 event_mask)
|
|
{
|
|
REQUIRE_NO_PROMISES;
|
|
|
|
if (pid == -1) {
|
|
if (!is_superuser())
|
|
return EPERM;
|
|
ScopedCritical critical;
|
|
g_profiling_event_mask = PERF_EVENT_PROCESS_CREATE | PERF_EVENT_THREAD_CREATE | PERF_EVENT_MMAP;
|
|
if (g_global_perf_events)
|
|
g_global_perf_events->clear();
|
|
else
|
|
g_global_perf_events = PerformanceEventBuffer::try_create_with_size(32 * MiB).leak_ptr();
|
|
|
|
ScopedSpinLock lock(g_processes_lock);
|
|
if (!TimeManagement::the().enable_profile_timer())
|
|
return ENOTSUP;
|
|
g_profiling_all_threads = true;
|
|
PerformanceManager::add_process_created_event(*Scheduler::colonel());
|
|
Process::for_each([](auto& process) {
|
|
PerformanceManager::add_process_created_event(process);
|
|
return IterationDecision::Continue;
|
|
});
|
|
g_profiling_event_mask = event_mask;
|
|
return 0;
|
|
}
|
|
|
|
ScopedSpinLock lock(g_processes_lock);
|
|
auto process = Process::from_pid(pid);
|
|
if (!process)
|
|
return ESRCH;
|
|
if (process->is_dead())
|
|
return ESRCH;
|
|
if (!is_superuser() && process->uid() != euid())
|
|
return EPERM;
|
|
g_profiling_event_mask = PERF_EVENT_PROCESS_CREATE | PERF_EVENT_THREAD_CREATE | PERF_EVENT_MMAP;
|
|
process->set_profiling(true);
|
|
if (!process->create_perf_events_buffer_if_needed()) {
|
|
process->set_profiling(false);
|
|
return ENOMEM;
|
|
}
|
|
g_profiling_event_mask = event_mask;
|
|
if (!TimeManagement::the().enable_profile_timer()) {
|
|
process->set_profiling(false);
|
|
return ENOTSUP;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
KResultOr<FlatPtr> Process::sys$profiling_disable(pid_t pid)
|
|
{
|
|
REQUIRE_NO_PROMISES;
|
|
|
|
if (pid == -1) {
|
|
if (!is_superuser())
|
|
return EPERM;
|
|
ScopedCritical critical;
|
|
if (!TimeManagement::the().disable_profile_timer())
|
|
return ENOTSUP;
|
|
g_profiling_all_threads = false;
|
|
return 0;
|
|
}
|
|
|
|
ScopedSpinLock lock(g_processes_lock);
|
|
auto process = Process::from_pid(pid);
|
|
if (!process)
|
|
return ESRCH;
|
|
if (!is_superuser() && process->uid() != euid())
|
|
return EPERM;
|
|
if (!process->is_profiling())
|
|
return EINVAL;
|
|
// FIXME: If we enabled the profile timer and it's not supported, how do we disable it now?
|
|
if (!TimeManagement::the().disable_profile_timer())
|
|
return ENOTSUP;
|
|
process->set_profiling(false);
|
|
return 0;
|
|
}
|
|
|
|
KResultOr<FlatPtr> Process::sys$profiling_free_buffer(pid_t pid)
|
|
{
|
|
REQUIRE_NO_PROMISES;
|
|
|
|
if (pid == -1) {
|
|
if (!is_superuser())
|
|
return EPERM;
|
|
|
|
OwnPtr<PerformanceEventBuffer> perf_events;
|
|
|
|
{
|
|
ScopedCritical critical;
|
|
|
|
perf_events = adopt_own_if_nonnull(g_global_perf_events);
|
|
g_global_perf_events = nullptr;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
ScopedSpinLock lock(g_processes_lock);
|
|
auto process = Process::from_pid(pid);
|
|
if (!process)
|
|
return ESRCH;
|
|
if (!is_superuser() && process->uid() != euid())
|
|
return EPERM;
|
|
if (process->is_profiling())
|
|
return EINVAL;
|
|
process->delete_perf_events_buffer();
|
|
return 0;
|
|
}
|
|
}
|