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Kernel: Propagate sys$profiling_enable() buffer allocation failure

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Caught a kernel panic when enabling profiling of all threads when there
was very little memory available.
This commit is contained in:
Andreas Kling 2022-02-06 01:25:32 +01:00
parent c1c5444c14
commit 04539d4930
1 changed files with 7 additions and 2 deletions
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9
Kernel/Syscalls/profiling.cpp
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@ -26,10 +26,15 @@ ErrorOr<FlatPtr> Process::sys$profiling_enable(pid_t pid, u64 event_mask)
return EPERM;
ScopedCritical critical;
g_profiling_event_mask = PERF_EVENT_PROCESS_CREATE | PERF_EVENT_THREAD_CREATE | PERF_EVENT_MMAP;
if (g_global_perf_events)
if (g_global_perf_events) {
g_global_perf_events->clear();
else
} else {
g_global_perf_events = PerformanceEventBuffer::try_create_with_size(32 * MiB).leak_ptr();
if (!g_global_perf_events) {
g_profiling_event_mask = 0;
return ENOMEM;
}
}
SpinlockLocker lock(g_profiling_lock);
if (!TimeManagement::the().enable_profile_timer())