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Kernel+LibC: Add PERF_EVENT_SIGNPOST

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This event will be used by userspace programs wanting to mark
interesting high-level events in the profile. :^)
This commit is contained in:
Andreas Kling 2021-08-11 20:04:03 +02:00
parent 84053816d5
commit 0d997d48ea
4 changed files with 17 additions and 0 deletions
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6
Kernel/PerformanceEventBuffer.h
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@ -62,6 +62,11 @@ struct [[gnu::packed]] KFreePerformanceEvent {
FlatPtr ptr;
};
struct [[gnu::packed]] SignpostPerformanceEvent {
FlatPtr arg1;
FlatPtr arg2;
};
struct [[gnu::packed]] PerformanceEvent {
u16 type { 0 };
u8 stack_size { 0 };
@ -80,6 +85,7 @@ struct [[gnu::packed]] PerformanceEvent {
ContextSwitchPerformanceEvent context_switch;
KMallocPerformanceEvent kmalloc;
KFreePerformanceEvent kfree;
SignpostPerformanceEvent signpost;
} data;
static constexpr size_t max_stack_frame_count = 64;
FlatPtr stack[max_stack_frame_count];