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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
// ===========================================================================
// File: CallCounter.h
//
// ===========================================================================
#ifndef CALL_COUNTER_H
#define CALL_COUNTER_H
#ifdef FEATURE_TIERED_COMPILATION
// One entry in our dictionary mapping methods to the number of times they
// have been invoked
struct CallCounterEntry
{
CallCounterEntry() {}
CallCounterEntry(const MethodDesc* m, const int c)
: pMethod(m), callCount(c) {}
const MethodDesc* pMethod;
int callCount;
};
class CallCounterHashTraits : public DefaultSHashTraits<CallCounterEntry>
{
public:
typedef typename DefaultSHashTraits<CallCounterEntry>::element_t element_t;
typedef typename DefaultSHashTraits<CallCounterEntry>::count_t count_t;
typedef const MethodDesc* key_t;
static key_t GetKey(element_t e)
{
LIMITED_METHOD_CONTRACT;
return e.pMethod;
}
static BOOL Equals(key_t k1, key_t k2)
{
LIMITED_METHOD_CONTRACT;
return k1 == k2;
}
static count_t Hash(key_t k)
{
LIMITED_METHOD_CONTRACT;
return (count_t)(size_t)k;
}
static const element_t Null() { LIMITED_METHOD_CONTRACT; return element_t(NULL, 0); }
static const element_t Deleted() { LIMITED_METHOD_CONTRACT; return element_t((const MethodDesc*)-1, 0); }
static bool IsNull(const element_t &e) { LIMITED_METHOD_CONTRACT; return e.pMethod == NULL; }
static bool IsDeleted(const element_t &e) { return e.pMethod == (const MethodDesc*)-1; }
};
typedef SHash<NoRemoveSHashTraits<CallCounterHashTraits>> CallCounterHash;
// This is a per-appdomain cache of call counts for all code in that AppDomain.
// Each method invocation should trigger a call to OnMethodCalled (until it is disabled per-method)
// and the CallCounter will forward the call to the TieredCompilationManager including the
// current call count.
class CallCounter
{
public:
#if defined(DACCESS_COMPILE) || defined(CROSSGEN_COMPILE)
CallCounter() {}
#else
CallCounter();
#endif
void OnMethodCalled(MethodDesc* pMethodDesc, TieredCompilationManager *pTieredCompilationManager, BOOL* shouldStopCountingCallsRef, BOOL* wasPromotedToTier1Ref);
private:
// fields protected by lock
SpinLock m_lock;
CallCounterHash m_methodToCallCount;
};
#endif // FEATURE_TIERED_COMPILATION
#endif // CALL_COUNTER_H
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