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kern: add kernel object debug

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This commit is contained in:
Michael Scire 2020-12-10 03:31:57 -08:00
parent 0acd79c8c2
commit 1a6e003a5d
16 changed files with 341 additions and 15 deletions
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39
libraries/libmesosphere/include/mesosphere/kern_k_slab_heap.hpp
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@ -140,7 +140,21 @@ namespace ams::kern {
void *obj = this->GetImpl()->Allocate();
/* TODO: under some debug define, track the peak for statistics, as N does? */
/* Track the allocated peak. */
#if defined(MESOSPHERE_BUILD_FOR_DEBUGGING)
if (AMS_LIKELY(obj != nullptr)) {
static_assert(std::atomic_ref<uintptr_t>::is_always_lock_free);
std::atomic_ref<uintptr_t> peak_ref(this->peak);
const uintptr_t alloc_peak = reinterpret_cast<uintptr_t>(obj) + this->GetObjectSize();
uintptr_t cur_peak = this->peak;
do {
if (alloc_peak <= cur_peak) {
break;
}
} while (!peak_ref.compare_exchange_strong(cur_peak, alloc_peak));
}
#endif
return obj;
}
@ -165,6 +179,29 @@ namespace ams::kern {
uintptr_t GetSlabHeapAddress() const {
return this->start;
}
size_t GetNumRemaining() const {
size_t remaining = 0;
/* Only calculate the number of remaining objects under debug configuration. */
#if defined(MESOSPHERE_BUILD_FOR_DEBUGGING)
while (true) {
auto *cur = this->GetImpl()->GetHead();
remaining = 0;
while (this->Contains(reinterpret_cast<uintptr_t>(cur))) {
++remaining;
cur = cur->next;
}
if (cur == nullptr) {
break;
}
}
#endif
return remaining;
}
};
template<typename T>