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#pragma once
#include <library/cpp/containers/stack_vector/stack_vec.h>
#include <library/cpp/cache/cache.h>
#include <library/cpp/deprecated/atomic/atomic.h>
#include <util/generic/noncopyable.h>
#include <util/generic/ptr.h>
#include <util/stream/output.h>
namespace NAllocProfiler {
struct TStats {
intptr_t Allocs = 0;
intptr_t Frees = 0;
intptr_t CurrentSize = 0;
void Clear()
{
Allocs = 0;
Frees = 0;
CurrentSize = 0;
}
void Alloc(size_t size)
{
AtomicIncrement(Allocs);
AtomicAdd(CurrentSize, size);
}
void Free(size_t size)
{
AtomicIncrement(Frees);
AtomicSub(CurrentSize, size);
}
};
struct TAllocationInfo {
int Tag;
TStats Stats;
TStackVec<void*, 64> Stack;
void Clear() {
Tag = 0;
Stats.Clear();
Stack.clear();
}
};
class IAllocationStatsDumper {
public:
virtual ~IAllocationStatsDumper() = default;
// Total stats
virtual void DumpTotal(const TStats& total) = 0;
// Stats for individual stack
virtual void DumpEntry(const TAllocationInfo& allocInfo) = 0;
// App-specific tag printer
virtual TString FormatTag(int tag);
// Size printer (e.g. "10KB", "100MB", "over 9000")
virtual TString FormatSize(intptr_t sz);
};
// Default implementation
class TAllocationStatsDumper: public IAllocationStatsDumper {
public:
explicit TAllocationStatsDumper(IOutputStream& out);
void DumpTotal(const TStats& total) override;
void DumpEntry(const TAllocationInfo& allocInfo) override;
private:
void FormatBackTrace(void* const* stack, size_t sz);
private:
struct TSymbol {
const void* Address;
TString Name;
};
size_t PrintedCount;
IOutputStream& Out;
TLFUCache<void*, TSymbol> SymbolCache;
};
////////////////////////////////////////////////////////////////////////////////
class TAllocationStackCollector: private TNonCopyable {
private:
class TImpl;
THolder<TImpl> Impl;
public:
TAllocationStackCollector();
~TAllocationStackCollector();
int Alloc(void** stack, size_t frameCount, int tag, size_t size);
void Free(int stackId, size_t size);
void Clear();
void Dump(int count, IAllocationStatsDumper& out) const;
};
} // namespace NAllocProfiler
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