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//
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
//
// ===========================================================================
// File: MIXEDMODE.CPP
//
//
// MIXEDMODE deals with mixed-mode binaries support
// ===========================================================================
#include "common.h"
#include "mixedmode.hpp"
#include "dllimportcallback.h"
#ifdef FEATURE_MIXEDMODE
IJWNOADThunk::IJWNOADThunk(HMODULE pModulebase, DWORD dwIndex, mdToken Token)
{
WRAPPER_NO_CONTRACT;
m_pModulebase=pModulebase;
m_dwIndex=dwIndex;
m_Token=Token;
m_fAccessingCache = 0;
for (int i=0; i < IJWNOADThunkStubCacheSize; i++)
{
m_cache[i].m_AppDomainID = (ADID)-1;
m_cache[i].m_CodeAddr = 0;
}
#ifdef _TARGET_X86_
m_code.Encode((BYTE*)GetEEFuncEntryPoint(IJWNOADThunkJumpTarget), this);
#else // !_TARGET_X86_
m_code.Encode((BYTE*)GetEEFuncEntryPoint(MakeCall), this);
#endif // !_TARGET_X86_
};
#define E_PROCESS_SHUTDOWN_REENTRY HRESULT_FROM_WIN32(ERROR_PROCESS_ABORTED)
#ifdef _TARGET_X86_
// Slow path lookup...called from stub
extern "C" LPCVOID __stdcall IJWNOADThunkJumpTargetHelper(IJWNOADThunk* pThunk)
{
WRAPPER_NO_CONTRACT;
return pThunk->FindThunkTarget();
}
#endif // _TARGET_X86_
LPCVOID IJWNOADThunk::FindThunkTarget()
{
CONTRACT(LPCVOID)
{
INSTANCE_CHECK;
NOTHROW;
GC_TRIGGERS;
MODE_ANY;
SO_TOLERANT;
POSTCONDITION(CheckPointer(RETVAL));
}
CONTRACT_END;
// We don't plan on fixing this in Whidbey...the IJW scenario has always assumed throwing is "ok" here.
CONTRACT_VIOLATION(ThrowsViolation);
LPCVOID pvTargetCode = NULL;
AppDomain* pDomain;
Thread* pThread = SetupThread();
// Ensure that we're in preemptive mode.
// We only need this check for a newly created
// CLR thread - it defaults to COOP mode from here.
GCX_PREEMP_NO_DTOR();
pDomain = GetAppDomain();
if (NULL == pDomain)
{
_ASSERTE(!"Appdomain should've been set up by SetupThread");
pDomain = SystemDomain::System()->DefaultDomain();
}
if (NULL != pDomain)
{
// Get a local copy so we don't have to deal with a race condition.
LPCVOID pCacheTarget = NULL;
GetCachedInfo(pDomain->GetId(), &pvTargetCode);
// Cache miss.
if (pvTargetCode==NULL)
{
INSTALL_UNWIND_AND_CONTINUE_HANDLER;
BEGIN_SO_INTOLERANT_CODE(pThread);
{
Module* pModule;
pModule = pDomain->GetIJWModule(m_pModulebase);
if (NULL == pModule)
{
// New for Whidbey: In V1.1, we just gave up and raised an exception if the target assembly wasn't already loaded
// into the current appdomain. We now force-inject the assembly.
PEAssemblyHolder pFile(pDomain->BindExplicitAssembly(m_pModulebase, FALSE));
pDomain->LoadAssembly(NULL, pFile, FILE_ACTIVE);
// Now, try the lookup again. The LoadAssembly() either worked or it didn't. If it didn't, it is probably
// due to lack of memory and all we can do is raise an exception and hope the IJW caller does something reasonable.
// Otherwise, we should now succeed in finding the current domain's instantiation of the target module.
pModule = pDomain->GetIJWModule(m_pModulebase);
}
if (NULL != pModule)
{
pModule->EnsureActive();
UMEntryThunk* pThunkTable;
pThunkTable = pModule->GetADThunkTable();
pvTargetCode = (LPVOID)GetEEFuncEntryPoint((LPVOID)pThunkTable[m_dwIndex].GetCode());
// Populate the cache with our latest info.
SetCachedInfo(pDomain->GetId(), pvTargetCode);
}
}
END_SO_INTOLERANT_CODE;
UNINSTALL_UNWIND_AND_CONTINUE_HANDLER;
}
}
if(pvTargetCode==NULL)
pvTargetCode=(LPVOID)GetEEFuncEntryPoint(SafeNoModule);
RETURN (LPCVOID)pvTargetCode;
}
#ifdef _TARGET_X86_
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning (disable : 4740) // There is inline asm code in this function, which disables
// global optimizations.
#endif // _MSC_VER
__declspec(naked) void _cdecl IJWNOADThunk::MakeCall()
{
WRAPPER_NO_CONTRACT;
struct
{
LPVOID This;
LPCVOID RetAddr;
} Vars;
#define LocalsSize 8
_asm enter LocalsSize+4,0;
_asm push ebx;
_asm push ecx;
_asm push edx;
_asm push esi;
_asm push edi;
_asm mov Vars.This, eax;
//careful above this point
_ASSERTE(sizeof(Vars)<=LocalsSize);
Vars.RetAddr = ((IJWNOADThunk*)Vars.This)->FindThunkTarget();
_ASSERTE(NULL != Vars.RetAddr);
_asm pop edi;
_asm pop esi;
_asm pop edx;
_asm pop ecx;
_asm pop ebx;
_asm mov eax,Vars.RetAddr;
_asm leave;
_asm jmp eax;
};
#if defined(_MSC_VER)
#pragma warning(pop)
#endif
#elif defined(_TARGET_AMD64_)
// Implemented in AMD64\UMThunkStub.asm
#elif defined(_TARGET_ARM_)
// Implemented in Arm\asmhelpers.asm
#else
void __cdecl IJWNOADThunk::MakeCall()
{
LIMITED_METHOD_CONTRACT;
PORTABILITY_ASSERT("IJWNOADThunk::MakeCall");
}
#endif
void IJWNOADThunk::SafeNoModule()
{
STATIC_CONTRACT_THROWS;
STATIC_CONTRACT_GC_TRIGGERS;
if (!CanRunManagedCode())
{
Thread* pThread=GetThread();
// DO NOT IMPROVE THIS EXCEPTION! It cannot be a managed exception. It
// cannot be a real exception object because we cannot execute any managed
// code here.
if(pThread)
pThread->m_fPreemptiveGCDisabled = 0;
COMPlusThrowBoot(E_PROCESS_SHUTDOWN_REENTRY);
}
NoModule();
}
void IJWNOADThunk::NoModule()
{
WRAPPER_NO_CONTRACT;
INSTALL_UNWIND_AND_CONTINUE_HANDLER;
//<TODO>This should give the file name as part of the exception message!</TODO>
COMPlusThrowHR(COR_E_DLLNOTFOUND);
UNINSTALL_UNWIND_AND_CONTINUE_HANDLER;
}
#endif // FEATURE_MIXEDMODE
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