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Add a debug mode for the KernelHeap.

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Drew Galbraith 2023-06-07 10:01:22 -07:00
parent 40b21d9c75
commit eb04242a59
4 changed files with 59 additions and 0 deletions
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33
zion/memory/kernel_heap.cpp
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@ -3,6 +3,8 @@
#include "debug/debug.h"
#include "memory/paging_util.h"
#define K_HEAP_DEBUG 0
namespace {
static KernelHeap* gKernelHeap = nullptr;
@ -24,12 +26,43 @@ void* KernelHeap::Allocate(uint64_t size) {
if (next_addr_ + size >= upper_bound_) {
panic("Kernel Heap Overrun");
}
#if K_HEAP_DEBUG
RecordSize(size);
#endif
EnsureResident(next_addr_, size);
uint64_t address = next_addr_;
next_addr_ += size;
return reinterpret_cast<void*>(address);
}
void KernelHeap::DumpDistribution() {
#if K_HEAP_DEBUG
uint64_t* distributions = gKernelHeap->distributions;
dbgln("<=4B: %u", distributions[0]);
dbgln("<=8B: %u", distributions[1]);
dbgln("<=16B: %u", distributions[2]);
dbgln("<=32B: %u", distributions[3]);
dbgln("<=64B: %u", distributions[4]);
dbgln("<=128B: %u", distributions[5]);
dbgln("<=256B: %u", distributions[6]);
dbgln("<=512B: %u", distributions[7]);
dbgln("<=1KiB: %u", distributions[8]);
dbgln("<=2KiB: %u", distributions[9]);
dbgln("<=4KiB: %u", distributions[10]);
dbgln("> 4KiB: %u", distributions[11]);
#endif
}
void KernelHeap::RecordSize(uint64_t size) {
size >>= 3;
uint64_t index = 0;
while (size && index < 11) {
size >>= 1;
index++;
}
distributions[index]++;
}
void* operator new(uint64_t size) { return GetKernelHeap().Allocate(size); }
void* operator new[](uint64_t size) { return GetKernelHeap().Allocate(size); }