415 lines
18 KiB
C++
415 lines
18 KiB
C++
#include "il2cpp-config.h"
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#include "metadata/GenericMetadata.h"
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#include "metadata/GenericMethod.h"
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#include "metadata/GenericSharing.h"
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#include "metadata/Il2CppGenericMethodCompare.h"
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#include "metadata/Il2CppGenericMethodHash.h"
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#include "os/Atomic.h"
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#include "os/Mutex.h"
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#include "utils/Memory.h"
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#include "vm/Class.h"
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#include "vm/Exception.h"
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#include "vm/GenericClass.h"
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#include "vm/MetadataAlloc.h"
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#include "vm/MetadataCache.h"
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#include "vm/MetadataLock.h"
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#include "vm/Method.h"
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#include "vm/Runtime.h"
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#include "vm/Type.h"
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#include "utils/Il2CppHashMap.h"
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#include "utils/InitOnce.h"
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#include "il2cpp-class-internals.h"
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#include "il2cpp-runtime-metadata.h"
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#include "il2cpp-runtime-stats.h"
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#include <string>
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#include "hybridclr/metadata/MetadataUtil.h"
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#include "hybridclr/metadata/MetadataModule.h"
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#include "hybridclr/interpreter/InterpreterModule.h"
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using il2cpp::metadata::GenericMetadata;
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using il2cpp::metadata::GenericSharing;
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using il2cpp::os::FastAutoLock;
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using il2cpp::vm::Class;
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using il2cpp::vm::GenericClass;
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using il2cpp::vm::MetadataCalloc;
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using il2cpp::vm::MetadataCache;
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using il2cpp::vm::Method;
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using il2cpp::vm::Runtime;
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using il2cpp::vm::Type;
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struct SharedGenericMethodInfo : public MethodInfo
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{
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SharedGenericMethodInfo() { memset(this, 0, sizeof(*this)); }
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Il2CppMethodPointer virtualCallMethodPointer;
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};
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static size_t SizeOfGenericMethodInfo()
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{
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// If full generic sharing is enabled we track an additional method pointer, virtualCallMethodPointer
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// that allows virtual calls from non-FGS code to FGS code to be done directly (via unresolved virtual calls)
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if (!il2cpp::vm::Runtime::IsFullGenericSharingEnabled())
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return sizeof(MethodInfo);
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return sizeof(SharedGenericMethodInfo);
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}
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static MethodInfo* AllocGenericMethodInfo()
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{
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return (MethodInfo*)MetadataCalloc(1, SizeOfGenericMethodInfo());
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}
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static MethodInfo* AllocCopyGenericMethodInfo(const MethodInfo* sourceMethodInfo)
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{
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MethodInfo* newMethodInfo = AllocGenericMethodInfo();
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memcpy(newMethodInfo, sourceMethodInfo, SizeOfGenericMethodInfo());
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return newMethodInfo;
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}
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namespace il2cpp
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{
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namespace metadata
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{
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typedef Il2CppReaderWriterLockedHashMap<const Il2CppGenericMethod*, MethodInfo*, Il2CppGenericMethodHash, Il2CppGenericMethodCompare> Il2CppGenericMethodMap;
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static Il2CppGenericMethodMap s_GenericMethodMap;
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static Il2CppGenericMethodMap s_PendingGenericMethodMap;
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static bool HasFullGenericSharedParametersOrReturn(const MethodInfo* methodDefinition)
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{
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if (Type::HasVariableRuntimeSizeWhenFullyShared(methodDefinition->return_type))
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return true;
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for (int i = 0; i < methodDefinition->parameters_count; i++)
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{
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if (Type::HasVariableRuntimeSizeWhenFullyShared(methodDefinition->parameters[i]))
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return true;
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}
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return false;
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}
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static void AGenericMethodWhichIsTooDeeplyNestedWasInvoked()
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{
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vm::Exception::Raise(vm::Exception::GetMaximumNestedGenericsException());
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}
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static void AGenericMethodWhichIsTooDeeplyNestedWasInvokedInvoker(Il2CppMethodPointer ptr, const MethodInfo* method, void* obj, void** args, void* ret)
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{
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AGenericMethodWhichIsTooDeeplyNestedWasInvoked();
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}
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static SharedGenericMethodInfo ambiguousMethodInfo;
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bool GenericMethod::IsGenericAmbiguousMethodInfo(const MethodInfo* method)
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{
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return method == &ambiguousMethodInfo;
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}
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const MethodInfo* GenericMethod::GetGenericVirtualMethod(const MethodInfo* vtableSlotMethod, const MethodInfo* genericVirtualMethod)
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{
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IL2CPP_NOT_IMPLEMENTED_NO_ASSERT(GetGenericVirtualMethod, "We should only do the following slow method lookup once and then cache on type itself.");
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const Il2CppGenericInst* classInst = NULL;
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if (vtableSlotMethod->is_inflated)
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{
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classInst = vtableSlotMethod->genericMethod->context.class_inst;
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vtableSlotMethod = vtableSlotMethod->genericMethod->methodDefinition;
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}
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return metadata::GenericMethod::GetMethod(vtableSlotMethod, classInst, genericVirtualMethod->genericMethod->context.method_inst);
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}
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const MethodInfo* GenericMethod::GetMethod(const MethodInfo* methodDefinition, const Il2CppGenericInst* classInst, const Il2CppGenericInst* methodInst)
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{
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Il2CppGenericMethod gmethod = { 0 };
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gmethod.methodDefinition = methodDefinition;
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gmethod.context.class_inst = classInst;
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gmethod.context.method_inst = methodInst;
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return GetMethod(&gmethod, true);
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}
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MethodInfo* GenericMethod::AllocateNewMethodInfo(const MethodInfo* methodDefinition, const Il2CppGenericInst* classInst, const Il2CppGenericInst* methodInst)
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{
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const MethodInfo* methodInfo = GetMethod(methodDefinition, classInst, methodInst);
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return AllocCopyGenericMethodInfo(methodInfo);
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}
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const MethodInfo* GenericMethod::GetMethod(const Il2CppGenericMethod* gmethod)
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{
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return GetMethod(gmethod, false);
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}
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Il2CppMethodPointer GenericMethod::GetVirtualCallMethodPointer(const MethodInfo* method)
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{
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IL2CPP_ASSERT(method->is_inflated);
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if (il2cpp::vm::Runtime::IsFullGenericSharingEnabled())
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return ((const SharedGenericMethodInfo*)method)->virtualCallMethodPointer;
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else
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return method->virtualMethodPointer;
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}
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const MethodInfo* GenericMethod::GetMethod(const Il2CppGenericMethod* gmethod, bool copyMethodPtr)
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{
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// This can be NULL only when we have hit the generic recursion depth limit.
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if (gmethod == NULL)
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{
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MethodInfo* newMethod = AllocGenericMethodInfo();
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if (il2cpp::vm::Runtime::IsFullGenericSharingEnabled())
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((SharedGenericMethodInfo*)newMethod)->virtualCallMethodPointer = AGenericMethodWhichIsTooDeeplyNestedWasInvoked;
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newMethod->methodPointer = AGenericMethodWhichIsTooDeeplyNestedWasInvoked;
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newMethod->virtualMethodPointer = AGenericMethodWhichIsTooDeeplyNestedWasInvoked;
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newMethod->invoker_method = AGenericMethodWhichIsTooDeeplyNestedWasInvokedInvoker;
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return newMethod;
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}
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// First check for an already constructed generic method using the shared/reader lock
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MethodInfo* existingMethod;
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if (s_GenericMethodMap.TryGet(gmethod, &existingMethod))
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return existingMethod;
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if (Method::IsAmbiguousMethodInfo(gmethod->methodDefinition))
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{
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// is_inflated is used as an initialized check
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if (!ambiguousMethodInfo.is_inflated)
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{
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memcpy(&ambiguousMethodInfo, gmethod->methodDefinition, sizeof(MethodInfo));
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ambiguousMethodInfo.is_inflated = true;
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// This method must have methodPointer null so that the test in RaiseExecutionEngineExceptionIfGenericVirtualMethodIsNotFound fails
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ambiguousMethodInfo.methodPointer = NULL;
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ambiguousMethodInfo.virtualCallMethodPointer = gmethod->methodDefinition->virtualMethodPointer;
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}
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return &ambiguousMethodInfo;
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}
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return CreateMethodLocked(gmethod, copyMethodPtr);
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}
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const MethodInfo* GenericMethod::CreateMethodLocked(const Il2CppGenericMethod* gmethod, bool copyMethodPtr)
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{
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// We need to inflate a new generic method, take the metadata mutex
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// All code below this point can and does assume mutual exclusion
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FastAutoLock lock(&il2cpp::vm::g_MetadataLock);
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// Recheck the s_GenericMethodMap in case there was a race to add this generic method
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MethodInfo* existingMethod;
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if (s_GenericMethodMap.TryGet(gmethod, &existingMethod))
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return existingMethod;
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// GetMethodLocked may be called recursively, we keep tracking of pending inflations
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if (s_PendingGenericMethodMap.TryGet(gmethod, &existingMethod))
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return existingMethod;
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if (copyMethodPtr)
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gmethod = MetadataCache::GetGenericMethod(gmethod->methodDefinition, gmethod->context.class_inst, gmethod->context.method_inst);
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const MethodInfo* methodDefinition = gmethod->methodDefinition;
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Il2CppClass* declaringClass = methodDefinition->klass;
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if (gmethod->context.class_inst)
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{
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Il2CppGenericClass* genericClassDeclaringType = GenericMetadata::GetGenericClass(methodDefinition->klass, gmethod->context.class_inst);
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declaringClass = GenericClass::GetClass(genericClassDeclaringType);
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// we may fail if we cannot construct generic type
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if (!declaringClass)
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return NULL;
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}
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MethodInfo* newMethod = AllocGenericMethodInfo();
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// we set the pending generic method map here because the initialization may recurse and try to retrieve the same generic method
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// this is safe because we *always* take the lock when retrieving the MethodInfo from a generic method.
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// if we move lock to only if MethodInfo needs constructed then we need to revisit this since we could return a partially initialized MethodInfo
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s_PendingGenericMethodMap.Add(gmethod, newMethod);
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newMethod->klass = declaringClass;
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newMethod->flags = methodDefinition->flags;
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newMethod->iflags = methodDefinition->iflags;
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newMethod->slot = methodDefinition->slot;
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newMethod->name = methodDefinition->name;
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newMethod->is_generic = false;
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newMethod->is_inflated = true;
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newMethod->token = methodDefinition->token;
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newMethod->return_type = GenericMetadata::InflateIfNeeded(methodDefinition->return_type, &gmethod->context, true);
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newMethod->parameters_count = methodDefinition->parameters_count;
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newMethod->parameters = GenericMetadata::InflateParameters(methodDefinition->parameters, methodDefinition->parameters_count, &gmethod->context, true);
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newMethod->genericMethod = gmethod;
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if (!gmethod->context.method_inst)
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{
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if (methodDefinition->is_generic)
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newMethod->is_generic = true;
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if (!declaringClass->generic_class)
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{
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newMethod->genericContainerHandle = methodDefinition->genericContainerHandle;
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}
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newMethod->methodMetadataHandle = methodDefinition->methodMetadataHandle;
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}
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else if (!il2cpp::vm::Runtime::IsLazyRGCTXInflationEnabled() && !il2cpp::metadata::GenericMetadata::ContainsGenericParameters(newMethod))
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{
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// we only need RGCTX for generic instance methods
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newMethod->rgctx_data = InflateRGCTXLocked(gmethod, lock);
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}
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il2cpp::vm::Il2CppGenericMethodPointers methodPointers = MetadataCache::GetGenericMethodPointers(methodDefinition, &gmethod->context);
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newMethod->virtualMethodPointer = methodPointers.virtualMethodPointer;
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newMethod->methodPointer = methodPointers.methodPointer;
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if (methodPointers.methodPointer)
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{
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newMethod->invoker_method = methodPointers.invoker_method;
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}
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else
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{
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newMethod->invoker_method = Runtime::GetMissingMethodInvoker();
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if (Method::IsInstance(newMethod))
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newMethod->virtualMethodPointer = MetadataCache::GetUnresolvedVirtualCallStub(newMethod);
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}
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bool isInterpMethod = hybridclr::metadata::IsInterpreterMethod(newMethod);
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if (!isInterpMethod)
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{
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newMethod->has_full_generic_sharing_signature = methodPointers.isFullGenericShared && HasFullGenericSharedParametersOrReturn(gmethod->methodDefinition);
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// Full generic sharing methods should be called via invoker
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// And invalid static methods can't use the unresolved virtual call stubs
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newMethod->indirect_call_via_invokers = newMethod->has_full_generic_sharing_signature || (!Method::IsInstance(newMethod) && newMethod->methodPointer == NULL);
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}
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++il2cpp_runtime_stats.inflated_method_count;
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if (il2cpp::vm::Runtime::IsFullGenericSharingEnabled())
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{
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SharedGenericMethodInfo* sharedMethodInfo = reinterpret_cast<SharedGenericMethodInfo*>(newMethod);
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if (il2cpp::vm::Method::HasFullGenericSharingSignature(newMethod) && il2cpp::vm::Method::IsInstance(newMethod))
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sharedMethodInfo->virtualCallMethodPointer = MetadataCache::GetUnresolvedVirtualCallStub(newMethod);
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else
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sharedMethodInfo->virtualCallMethodPointer = newMethod->virtualMethodPointer;
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}
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bool isAotImplByInterp = hybridclr::metadata::MetadataModule::IsImplementedByInterpreter(newMethod);
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bool isAdjustorThunkMethod = IS_CLASS_VALUE_TYPE(newMethod->klass) && hybridclr::metadata::IsInstanceMethod(newMethod);
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if (methodPointers.methodPointer == nullptr)
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{
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if (isInterpMethod || isAotImplByInterp)
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{
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newMethod->invoker_method = hybridclr::interpreter::InterpreterModule::GetMethodInvoker(newMethod);
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newMethod->methodPointer = newMethod->methodPointerCallByInterp = hybridclr::interpreter::InterpreterModule::GetMethodPointer(newMethod);
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newMethod->virtualMethodPointer = newMethod->virtualMethodPointerCallByInterp = isAdjustorThunkMethod ?
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hybridclr::interpreter::InterpreterModule::GetAdjustThunkMethodPointer(newMethod) :
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(newMethod->methodPointerCallByInterp != hybridclr::interpreter::InterpreterModule::NotSupportNative2Managed ?
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newMethod->methodPointerCallByInterp : hybridclr::interpreter::InterpreterModule::NotSupportAdjustorThunk);
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newMethod->isInterpterImpl = true;
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newMethod->initInterpCallMethodPointer = true;
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}
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}
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else
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{
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if (newMethod->indirect_call_via_invokers && isAotImplByInterp)
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{
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newMethod->methodPointerCallByInterp = hybridclr::interpreter::InterpreterModule::GetMethodPointer(newMethod);
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newMethod->virtualMethodPointerCallByInterp = isAdjustorThunkMethod ?
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hybridclr::interpreter::InterpreterModule::GetAdjustThunkMethodPointer(newMethod) :
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(newMethod->methodPointerCallByInterp != hybridclr::interpreter::InterpreterModule::NotSupportNative2Managed ?
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newMethod->methodPointerCallByInterp : hybridclr::interpreter::InterpreterModule::NotSupportAdjustorThunk);
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newMethod->invoker_method = hybridclr::interpreter::InterpreterModule::GetMethodInvoker(newMethod);
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newMethod->methodPointer = newMethod->methodPointerCallByInterp;
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newMethod->virtualMethodPointer = newMethod->virtualMethodPointerCallByInterp;
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newMethod->isInterpterImpl = true;
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newMethod->initInterpCallMethodPointer = true;
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}
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}
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if (!newMethod->isInterpterImpl && !newMethod->indirect_call_via_invokers)
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{
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newMethod->methodPointerCallByInterp = newMethod->methodPointer;
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newMethod->virtualMethodPointerCallByInterp = GetVirtualCallMethodPointer(newMethod);
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}
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else
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{
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//newMethod->initInterpCallMethodPointer = true;
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newMethod->indirect_call_via_invokers = false;
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newMethod->has_full_generic_sharing_signature = false;
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}
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// If we are a default interface method on a generic instance interface we need to ensure that the interfaces rgctx is inflated
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if (Method::IsDefaultInterfaceMethodOnGenericInstance(newMethod))
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vm::Class::InitLocked(declaringClass, lock);
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// The generic method is fully created,
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// Update the generic method map, this needs to take an exclusive lock
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// **** This must happen with the metadata lock held and be released before the metalock is released ****
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// **** This prevents deadlocks and ensures that there is no race condition
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// **** creating a new method adding it to s_GenericMethodMap and removing it from s_PendingGenericMethodMap
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s_GenericMethodMap.Add(gmethod, newMethod);
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// Remove the method from the pending table
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s_PendingGenericMethodMap.Remove(gmethod);
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return newMethod;
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}
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const Il2CppRGCTXData* GenericMethod::InflateRGCTX(const MethodInfo* method)
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{
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IL2CPP_ASSERT(method->is_inflated);
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IL2CPP_ASSERT(method->genericMethod);
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IL2CPP_ASSERT(method->genericMethod->context.method_inst);
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return il2cpp::utils::InitOnce(const_cast<Il2CppRGCTXData**>(&method->rgctx_data), &il2cpp::vm::g_MetadataLock, [method](const il2cpp::os::FastAutoLock& lock) {
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return const_cast<Il2CppRGCTXData*>(GenericMethod::InflateRGCTXLocked(method->genericMethod, lock));
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});
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}
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const Il2CppRGCTXData* GenericMethod::InflateRGCTXLocked(const Il2CppGenericMethod* gmethod, const il2cpp::os::FastAutoLock &lock)
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{
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return GenericMetadata::InflateRGCTXLocked(gmethod->methodDefinition->klass->image, gmethod->methodDefinition->token, &gmethod->context, lock);
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}
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const Il2CppGenericContext* GenericMethod::GetContext(const Il2CppGenericMethod* gmethod)
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{
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return &gmethod->context;
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}
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static std::string FormatGenericArguments(const Il2CppGenericInst* inst)
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{
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std::string output;
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if (inst)
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{
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output.append("<");
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for (size_t i = 0; i < inst->type_argc; ++i)
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{
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if (i != 0)
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output.append(", ");
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output.append(Type::GetName(inst->type_argv[i], IL2CPP_TYPE_NAME_FORMAT_FULL_NAME));
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}
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output.append(">");
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}
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return output;
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}
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std::string GenericMethod::GetFullName(const Il2CppGenericMethod* gmethod)
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{
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const MethodInfo* method = gmethod->methodDefinition;
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std::string output;
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output.append(Type::GetName(&gmethod->methodDefinition->klass->byval_arg, IL2CPP_TYPE_NAME_FORMAT_FULL_NAME));
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output.append(FormatGenericArguments(gmethod->context.class_inst));
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output.append("::");
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output.append(Method::GetName(method));
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output.append(FormatGenericArguments(gmethod->context.method_inst));
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return output;
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}
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void GenericMethod::ClearStatics()
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{
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s_GenericMethodMap.Clear();
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}
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} /* namespace vm */
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} /* namespace il2cpp */
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