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Kernel: Better handling of allocation failure in profiling

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If we can't allocate a PerformanceEventBuffer to store the profiling
events, we now fail sys$profiling_enable() and sys$perf_event()
with ENOMEM instead of carrying on with a broken buffer.
This commit is contained in:
Andreas Kling 2021-03-02 16:55:54 +01:00
parent e7ef729db3
commit b425c2602c
6 changed files with 26 additions and 18 deletions
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3
Kernel/Syscalls/profiling.cpp
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@ -43,7 +43,8 @@ KResultOr<int> Process::sys$profiling_enable(pid_t pid)
return ESRCH;
if (!is_superuser() && process->uid() != m_euid)
return EPERM;
process->ensure_perf_events();
if (!process->create_perf_events_buffer_if_needed())
return ENOMEM;
process->set_profiling(true);
return 0;
}