dotnet · AaronRobinsonMSFT · Jul 24, 2026 · Jul 24, 2026 · Jul 25, 2026 · Jul 25, 2026
diff --git a/src/coreclr/binder/assembly.cpp b/src/coreclr/binder/assembly.cpp
@@ -57,7 +57,7 @@ namespace BINDER_SPACE
         m_pPEImage = pPEImage;
 
         // Now take ownership of assembly name
-        m_pAssemblyName = pAssemblyName.Extract();
+        m_pAssemblyName = pAssemblyName.Detach();
 
     Exit:
         return hr;

diff --git a/src/coreclr/binder/assemblybindercommon.cpp b/src/coreclr/binder/assemblybindercommon.cpp
@@ -329,7 +329,7 @@ namespace BINDER_SPACE
 
         IF_FAIL_GO(hr);
 
-        *ppSystemAssembly = pSystemAssembly.Extract();
+        *ppSystemAssembly = pSystemAssembly.Detach();
 
     Exit:
         return hr;
@@ -382,7 +382,7 @@ namespace BINDER_SPACE
                                                probeExtensionResult));
         BinderTracing::PathProbed(sCoreLibSatellite, pathSource, hr);
 
-        *ppSystemAssembly = pSystemAssembly.Extract();
+        *ppSystemAssembly = pSystemAssembly.Detach();
 
     Exit:
         return hr;
@@ -790,7 +790,8 @@ namespace BINDER_SPACE
                 }
 
                 // Set any found assembly. It is up to the caller to check the returned HRESULT for errors due to validation
-                *ppAssembly = pAssembly.Extract();
+                Assembly* pFoundAssembly = pAssembly.Detach();
+                *ppAssembly = pFoundAssembly;
                 if (FAILED(hr))
                     return hr;
 
@@ -800,7 +801,7 @@ namespace BINDER_SPACE
                 // we fail the bind.
 
                 // Compare requested AssemblyName with that from the candidate assembly
-                if (!TestCandidateRefMatchesDef(pRequestedAssemblyName, pAssembly->GetAssemblyName(), false /*tpaListAssembly*/))
+                if (!TestCandidateRefMatchesDef(pRequestedAssemblyName, pFoundAssembly->GetAssemblyName(), false /*tpaListAssembly*/))
                     return FUSION_E_REF_DEF_MISMATCH;
 
                 return S_OK;
@@ -901,35 +902,36 @@ namespace BINDER_SPACE
                 _ASSERTE(pTpaEntry->m_wszILFileName != nullptr);
                 SString fileName(pTpaEntry->m_wszILFileName);
 
+                ReleaseHolder<Assembly> pAssembly;
                 SString getAssemblyDiag;
                 hr = GetAssembly(fileName,
                                     TRUE,  // fIsInTPA
-                                    &pTPAAssembly,
+                                    &pAssembly,
                                     ProbeExtensionResult::Invalid(),
                                     &getAssemblyDiag);
                 pBindResult->AppendDiagnosticInfo(getAssemblyDiag);
                 BinderTracing::PathProbed(fileName, BinderTracing::PathSource::ApplicationAssemblies, hr);
 
-                pBindResult->SetAttemptResult(hr, pTPAAssembly);
+                pBindResult->SetAttemptResult(hr, pAssembly);
 
                 // On file not found, simply fall back to app path probing
                 if (hr != HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND))
                 {
                     // Any other error is fatal
                     IF_FAIL_GO(hr);
 
-                    if (TestCandidateRefMatchesDef(pRequestedAssemblyName, pTPAAssembly->GetAssemblyName(), true /*tpaListAssembly*/))
+                    if (TestCandidateRefMatchesDef(pRequestedAssemblyName, pAssembly->GetAssemblyName(), true /*tpaListAssembly*/))
                     {
                         // We have found the requested assembly match on TPA with validation of the full-qualified name. Bind to it.
-                        pBindResult->SetResult(pTPAAssembly);
-                        pBindResult->SetAttemptResult(S_OK, pTPAAssembly);
+                        pBindResult->SetResult(pAssembly);
+                        pBindResult->SetAttemptResult(S_OK, pAssembly);
                         GO_WITH_HRESULT(S_OK);
                     }
                     else
                     {
                         // We found the assembly on TPA but it didn't match the RequestedAssembly assembly-name. In this case, lets proceed to see if we find the requested
                         // assembly in the App paths.
-                        pBindResult->SetAttemptResult(FUSION_E_REF_DEF_MISMATCH, pTPAAssembly);
+                        pBindResult->SetAttemptResult(FUSION_E_REF_DEF_MISMATCH, pAssembly);
                         fPartialMatchOnTpa = true;
                     }
                 }
@@ -1030,7 +1032,7 @@ namespace BINDER_SPACE
         }
 
         // We're done
-        *ppAssembly = pAssembly.Extract();
+        *ppAssembly = pAssembly.Detach();
 
     Exit:
 

diff --git a/src/coreclr/binder/customassemblybinder.cpp b/src/coreclr/binder/customassemblybinder.cpp
@@ -98,7 +98,7 @@ HRESULT CustomAssemblyBinder::BindUsingAssemblyName(BINDER_SPACE::AssemblyName*
     // For TPA assemblies that were bound, DefaultBinder
     // would have already set the binder reference for the assembly, so we just need to
     // extract the reference now.
-    *ppAssembly = pCoreCLRFoundAssembly.Extract();
+    *ppAssembly = pCoreCLRFoundAssembly.Detach();
 
 Exit:;
 
@@ -139,7 +139,7 @@ HRESULT CustomAssemblyBinder::BindUsingPEImage( /* in */ PEImage *pPEImage,
         {
             _ASSERTE(pCoreCLRFoundAssembly != NULL);
             pCoreCLRFoundAssembly->SetBinder(this);
-            *ppAssembly = pCoreCLRFoundAssembly.Extract();
+            *ppAssembly = pCoreCLRFoundAssembly.Detach();
         }
 Exit:;
     }

diff --git a/src/coreclr/binder/defaultassemblybinder.cpp b/src/coreclr/binder/defaultassemblybinder.cpp
@@ -111,7 +111,7 @@ HRESULT DefaultAssemblyBinder::BindUsingAssemblyName(BINDER_SPACE::AssemblyName
 
     IF_FAIL_GO(hr);
 
-    *ppAssembly = pCoreCLRFoundAssembly.Extract();
+    *ppAssembly = pCoreCLRFoundAssembly.Detach();
 
 Exit:;
 
@@ -162,7 +162,7 @@ HRESULT DefaultAssemblyBinder::BindUsingPEImage( /* in */ PEImage *pPEImage,
                 {
                     if (pCoreCLRFoundAssembly->GetIsInTPA())
                     {
-                        *ppAssembly = pCoreCLRFoundAssembly.Extract();
+                        *ppAssembly = pCoreCLRFoundAssembly.Detach();
                         goto Exit;
                     }
                 }
@@ -172,19 +172,20 @@ HRESULT DefaultAssemblyBinder::BindUsingPEImage( /* in */ PEImage *pPEImage,
                     // Return the existing assembly so the caller can provide an informative error message.
                     if (ppExistingAssemblyOnConflict != nullptr)
                     {
-                        *ppExistingAssemblyOnConflict = pExistingAssembly.Extract();
+                        *ppExistingAssemblyOnConflict = pExistingAssembly.Detach();
                     }
                     goto Exit;
                 }
             }
         }
 
+        pCoreCLRFoundAssembly.Free(); // Ensure we don't leak the previous assembly if we had one
         hr = AssemblyBinderCommon::BindUsingPEImage(this, pAssemblyName, pPEImage, excludeAppPaths, &pCoreCLRFoundAssembly, ppExistingAssemblyOnConflict);
         if (hr == S_OK)
         {
             _ASSERTE(pCoreCLRFoundAssembly != NULL);
             pCoreCLRFoundAssembly->SetBinder(this);
-            *ppAssembly = pCoreCLRFoundAssembly.Extract();
+            *ppAssembly = pCoreCLRFoundAssembly.Detach();
         }
 Exit:;
     }
@@ -221,7 +222,7 @@ HRESULT DefaultAssemblyBinder::BindToSystem(BINDER_SPACE::Assembly** ppSystemAss
         if (SUCCEEDED(hr))
         {
             _ASSERTE(pAsm != NULL);
-            *ppSystemAssembly = pAsm.Extract();
+            *ppSystemAssembly = pAsm.Detach();
             (*ppSystemAssembly)->SetBinder(this);
         }
 

diff --git a/src/coreclr/clrdefinitions.cmake b/src/coreclr/clrdefinitions.cmake
@@ -1,6 +1,7 @@
 include(${CMAKE_CURRENT_LIST_DIR}/clrfeatures.cmake)
 
 add_compile_definitions($<$<BOOL:$<TARGET_PROPERTY:DAC_COMPONENT>>:DACCESS_COMPILE>)
+add_compile_definitions($<$<BOOL:$<TARGET_PROPERTY:DBI_COMPONENT>>:DBI_COMPILE>)
 
 if (CLR_CMAKE_TARGET_UNIX)
 

diff --git a/src/coreclr/debug/createdump/crashinfo.cpp b/src/coreclr/debug/createdump/crashinfo.cpp
@@ -303,7 +303,7 @@ CrashInfo::InitializeDAC(DumpType dumpType)
         printf_error("InitializeDAC: coreclr not found; not using DAC\n");
         return true;
     }
-    ReleaseHolder<DumpDataTarget> dataTarget = new DumpDataTarget(*this);
+    ReleaseHolder<DumpDataTarget> dataTarget{ new DumpDataTarget(*this) };
     PFN_CLRDataCreateInstance pfnCLRDataCreateInstance = nullptr;
     PFN_DLLMAIN pfnDllMain = nullptr;
     bool result = false;
@@ -483,7 +483,7 @@ CrashInfo::UnwindAllThreads()
     if (m_appModel != AppModelType::NativeAOT)
     {
         TRACE("UnwindAllThreads: STARTED (%d)\n", m_dataTargetPagesAdded);
-        ReleaseHolder<ISOSDacInterface> pSos = nullptr;
+        ReleaseHolder<ISOSDacInterface> pSos;
         if (m_pClrDataProcess != nullptr) {
             m_pClrDataProcess->QueryInterface(__uuidof(ISOSDacInterface), (void**)&pSos);
         }

diff --git a/src/coreclr/debug/createdump/createdumpunix.cpp b/src/coreclr/debug/createdump/createdumpunix.cpp
@@ -14,7 +14,7 @@ long g_pageSize = 0;
 bool
 CreateDump(const CreateDumpOptions& options)
 {
-    ReleaseHolder<CrashInfo> crashInfo = new CrashInfo(options);
+    ReleaseHolder<CrashInfo> crashInfo{ new CrashInfo(options) };
     DumpWriter dumpWriter(*crashInfo);
     std::string dumpPath;
     bool result = false;

diff --git a/src/coreclr/debug/createdump/threadinfo.cpp b/src/coreclr/debug/createdump/threadinfo.cpp
@@ -299,7 +299,8 @@ ThreadInfo::GatherStackFrames(CONTEXT* pContext, IXCLRDataStackWalk* pStackwalk)
     }
 
     // Add managed stack frame for the crash info notes
-    StackFrame frame(moduleAddress, ip, sp, pMethod.Extract(), nativeOffset, token, ilOffset);
+    StackFrame frame(moduleAddress, ip, sp, pMethod, nativeOffset, token, ilOffset);
+    pMethod.Detach();
     AddStackFrame(frame);
 }
 

diff --git a/src/coreclr/debug/daccess/cdac.h b/src/coreclr/debug/daccess/cdac.h
@@ -18,7 +18,7 @@ class CDAC final
     CDAC(CDAC&& other)
         : m_module{ other.m_module }
         , m_cdac_handle{ other.m_cdac_handle }
-        , m_target{ other.m_target.Extract() }
+        , m_target{ other.m_target.Detach() }
         , m_legacyImpl{ other.m_legacyImpl }
     {
         other.m_module = NULL;
@@ -31,7 +31,7 @@ class CDAC final
     {
         m_module = other.m_module;
         m_cdac_handle = other.m_cdac_handle;
-        m_target = other.m_target.Extract();
+        m_target = other.m_target.Detach();
         m_legacyImpl = other.m_legacyImpl;
 
         other.m_module = NULL;

diff --git a/src/coreclr/debug/daccess/daccess.cpp b/src/coreclr/debug/daccess/daccess.cpp
@@ -6540,7 +6540,7 @@ CLRDataCreateInstance(REFIID iid,
 #endif
 
     // TODO: [cdac] Remove when cDAC deploys with SOS - https://github.com/dotnet/runtime/issues/108720
-    ReleaseHolder<IUnknown> cdacInterface = nullptr;
+    ReleaseHolder<IUnknown> cdacInterface;
 #ifdef CAN_USE_CDAC
     CLRConfigNoCache enable = CLRConfigNoCache::Get("ENABLE_CDAC");
     if (enable.IsSet())

diff --git a/src/coreclr/debug/daccess/dacdbiimpl.cpp b/src/coreclr/debug/daccess/dacdbiimpl.cpp
@@ -309,7 +309,7 @@ DacDbiInterfaceInstance(
                 cdac = CDAC::Create(contractDescriptorAddr, pDac->m_pTarget, legacyImpl);
                 if (cdac.IsValid())
                 {
-                    ReleaseHolder<IUnknown> cdacInterface = nullptr;
+                    ReleaseHolder<IUnknown> cdacInterface;
                     cdac.CreateDacDbiInterface(&cdacInterface);
                     if (cdacInterface != nullptr)
                     {