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Kernel: Reset profiling state on exec() (but keep it going)

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We now log the new executable on exec() and throw away all the samples
we've accumulated so far. But profiling keeps going.
This commit is contained in:
Andreas Kling 2020-02-22 10:54:50 +01:00
parent 647d0b9e0f
commit d7a13dbaa7
Notes: sideshowbarker 2024-07-19 09:10:37 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/d7a13dbaa73
3 changed files with 10 additions and 0 deletions
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3
Kernel/Process.cpp
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@ -1015,6 +1015,9 @@ int Process::do_exec(NonnullRefPtr<FileDescription> main_program_description, Ve
kprintf("Process %u (%s) exec'd %s @ %p\n", pid(), name().characters(), path.characters(), tss.eip);
#endif
if (is_profiling())
Profiling::did_exec(path);
new_main_thread->set_state(Thread::State::Skip1SchedulerPass);
big_lock().force_unlock_if_locked();
return 0;

6
Kernel/Profiling.cpp
View file

@ -90,6 +90,12 @@ void stop()
s_process = nullptr;
}
void did_exec(const String& new_executable_path)
{
executable_path() = new_executable_path;
s_next_slot_index = 0;
}
void for_each_sample(Function<void(Sample&)> callback)
{
for (size_t i = 0; i < s_next_slot_index; ++i) {

1
Kernel/Profiling.h
View file

@ -51,6 +51,7 @@ extern String& executable_path();
Sample& next_sample_slot();
void start(Process&);
void stop();
void did_exec(const String& new_executable_path);
void for_each_sample(Function<void(Sample&)>);
}