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Kernel: Add syscall performance event type
This allows tracing the syscalls made by a thread through the kernel's performance event framework, which is similar in principle to strace. Currently, this merely logs a stack backtrace to the current thread's performance event buffer whenever a syscall is made, if profiling is enabled. Future improvements could include tracing the arguments and the return value, for example.
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4c4b8ea443
commit
0286160b62
6 changed files with 24 additions and 1 deletions
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@ -135,6 +135,8 @@ KResult PerformanceEventBuffer::append_with_ip_and_bp(ProcessID pid, ThreadID ti
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break;
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case PERF_EVENT_PAGE_FAULT:
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break;
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case PERF_EVENT_SYSCALL:
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break;
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default:
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return EINVAL;
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}
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@ -226,6 +228,9 @@ bool PerformanceEventBuffer::to_json_impl(Serializer& object) const
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case PERF_EVENT_PAGE_FAULT:
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event_object.add("type", "page_fault");
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break;
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case PERF_EVENT_SYSCALL:
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event_object.add("type", "syscall");
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break;
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}
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event_object.add("pid", event.pid);
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event_object.add("tid", event.tid);
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