path: root/src/vm/common.h

// 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.
//
// common.h - precompiled headers include for the COM+ Execution Engine
//

//


#ifndef _common_h_ 
#define _common_h_

#if defined(_MSC_VER) && defined(_X86_) && !defined(FPO_ON)
#pragma optimize("y", on)       // Small critical routines, don't put in EBP frame 
#define FPO_ON 1
#define COMMON_TURNED_FPO_ON 1
#endif

#define USE_COM_CONTEXT_DEF

#if defined(_DEBUG) && !defined(CROSSGEN_COMPILE)
#define DEBUG_REGDISPLAY
#endif

#ifdef _MSC_VER 

    // These don't seem useful, so turning them off is no big deal
#pragma warning(disable:4201)   // nameless struct/union
#pragma warning(disable:4510)   // can't generate default constructor
//#pragma warning(disable:4511)   // can't generate copy constructor
#pragma warning(disable:4512)   // can't generate assignment constructor
#pragma warning(disable:4610)   // user defined constructor required
#pragma warning(disable:4211)   // nonstandard extention used (char name[0] in structs)
#pragma warning(disable:4268)   // 'const' static/global data initialized with compiler generated default constructor fills the object with zeros
#pragma warning(disable:4238)   // nonstandard extension used : class rvalue used as lvalue
#pragma warning(disable:4291)   // no matching operator delete found
#pragma warning(disable:4345)   // behavior change: an object of POD type constructed with an initializer of the form () will be default-initialized

    // Depending on the code base, you may want to not disable these
#pragma warning(disable:4245)   // assigning signed / unsigned
//#pragma warning(disable:4146)   // unary minus applied to unsigned
//#pragma warning(disable:4244)   // loss of data int -> char ..
#pragma warning(disable:4127)   // conditional expression is constant
#pragma warning(disable:4100)   // unreferenced formal parameter

#pragma warning(1:4189)   // local variable initialized but not used

#ifndef DEBUG 
#pragma warning(disable:4505)   // unreferenced local function has been removed
//#pragma warning(disable:4702)   // unreachable code
#pragma warning(disable:4313)   // 'format specifier' in format string conflicts with argument %d of type 'type'
#endif // !DEBUG

    // CONSIDER put these back in
#pragma warning(disable:4063)   // bad switch value for enum (only in Disasm.cpp)
#pragma warning(disable:4710)   // function not inlined
#pragma warning(disable:4527)   // user-defined destructor required
#pragma warning(disable:4513)   // destructor could not be generated

    // <TODO>TODO we really probably need this one put back in!!!</TODO>
//#pragma warning(disable:4701)   // local variable may be used without being initialized
#endif // _MSC_VER

#define _CRT_DEPENDENCY_   //this code depends on the crt file functions


#include <stdint.h>
#include <winwrap.h>


#include <windef.h>
#include <winnt.h>
#include <stdlib.h>
#include <wchar.h>
#include <objbase.h>
#include <stddef.h>
#include <float.h>
#include <math.h>
#include <time.h>
#include <limits.h>
#include <assert.h>

#include <olectl.h>

#ifdef _MSC_VER 
//non inline intrinsics are faster
#pragma function(memcpy,memcmp,strcmp,strcpy,strlen,strcat)
#endif // _MSC_VER

#include "volatile.h"

// make all the unsafe redefinitions available
#include "unsafe.h"

#include <../../debug/inc/dbgtargetcontext.h>

//-----------------------------------------------------------------------------------------------------------

#include "compatibilityflags.h"
extern BOOL GetCompatibilityFlag(CompatibilityFlag flag);

#include "strongname.h"
#include "stdmacros.h"

#define POISONC ((UINT_PTR)((sizeof(int *) == 4)?0xCCCCCCCCL:I64(0xCCCCCCCCCCCCCCCC)))

#include "ndpversion.h"
#include "switches.h"
#include "holder.h"
#include "classnames.h"
#include "util.hpp"
#include "corpriv.h"
//#include "WarningControl.h"

#include <daccess.h>

typedef VPTR(class LoaderAllocator)     PTR_LoaderAllocator;
typedef VPTR(class AppDomain)           PTR_AppDomain;
typedef VPTR(class AppDomainBaseObject) PTR_AppDomainBaseObject;
typedef DPTR(class ArrayBase)           PTR_ArrayBase;
typedef DPTR(class ArrayTypeDesc)       PTR_ArrayTypeDesc;
typedef DPTR(class Assembly)            PTR_Assembly;
typedef DPTR(class AssemblyBaseObject)  PTR_AssemblyBaseObject;
typedef DPTR(class AssemblyNameBaseObject) PTR_AssemblyNameBaseObject;
typedef VPTR(class BaseDomain)          PTR_BaseDomain;
typedef DPTR(class ClassLoader)         PTR_ClassLoader;
typedef DPTR(class ComCallMethodDesc)   PTR_ComCallMethodDesc;
typedef VPTR(class CompilationDomain)   PTR_CompilationDomain;
typedef DPTR(class ComPlusCallMethodDesc) PTR_ComPlusCallMethodDesc;
typedef VPTR(class DebugInterface)      PTR_DebugInterface;
typedef DPTR(class Dictionary)          PTR_Dictionary;
typedef VPTR(class DomainAssembly)      PTR_DomainAssembly;
typedef VPTR(class DomainFile)          PTR_DomainFile;
typedef VPTR(class DomainModule)        PTR_DomainModule;
typedef DPTR(struct FailedAssembly)     PTR_FailedAssembly;
typedef VPTR(class EditAndContinueModule) PTR_EditAndContinueModule;
typedef DPTR(class EEClass)             PTR_EEClass;
typedef DPTR(class DelegateEEClass)     PTR_DelegateEEClass;
typedef DPTR(struct DomainLocalModule)  PTR_DomainLocalModule;
typedef VPTR(class EECodeManager)       PTR_EECodeManager;
typedef DPTR(class EEConfig)            PTR_EEConfig;
typedef VPTR(class EEDbgInterfaceImpl)  PTR_EEDbgInterfaceImpl;
typedef VPTR(class DebugInfoManager)    PTR_DebugInfoManager;
typedef DPTR(class FieldDesc)           PTR_FieldDesc;
typedef VPTR(class Frame)               PTR_Frame;
typedef VPTR(class ICodeManager)        PTR_ICodeManager;
typedef VPTR(class IJitManager)         PTR_IJitManager;
typedef VPTR(struct IUnknown)           PTR_IUnknown;
typedef DPTR(class InstMethodHashTable) PTR_InstMethodHashTable;
typedef DPTR(class MetaSig)             PTR_MetaSig;
typedef DPTR(class MethodDesc)          PTR_MethodDesc;
typedef DPTR(class MethodDescChunk)     PTR_MethodDescChunk;
typedef DPTR(class MethodImpl)          PTR_MethodImpl;
typedef DPTR(class MethodTable)         PTR_MethodTable;
typedef DPTR(class MscorlibBinder)      PTR_MscorlibBinder;
typedef VPTR(class Module)              PTR_Module;
typedef DPTR(class NDirectMethodDesc)   PTR_NDirectMethodDesc;
typedef VPTR(class Thread)              PTR_Thread;
typedef DPTR(class Object)              PTR_Object;
typedef DPTR(PTR_Object)                PTR_PTR_Object;
typedef DPTR(class ObjHeader)           PTR_ObjHeader;
typedef DPTR(class Precode)             PTR_Precode;
typedef VPTR(class ReflectionModule)    PTR_ReflectionModule;
typedef DPTR(class ReflectClassBaseObject) PTR_ReflectClassBaseObject;
typedef DPTR(class ReflectMethodObject) PTR_ReflectMethodObject;
typedef DPTR(class ReflectFieldObject)  PTR_ReflectFieldObject;
typedef DPTR(class ReflectModuleBaseObject) PTR_ReflectModuleBaseObject;
typedef DPTR(class ReJitManager)        PTR_ReJitManager;
typedef DPTR(struct ReJitInfo)          PTR_ReJitInfo;
typedef DPTR(struct SharedReJitInfo)    PTR_SharedReJitInfo;
typedef DPTR(class StringObject)        PTR_StringObject;
typedef DPTR(class StringBufferObject)  PTR_StringBufferObject;
typedef DPTR(class TypeHandle)          PTR_TypeHandle;
typedef VPTR(class VirtualCallStubManager) PTR_VirtualCallStubManager;
typedef VPTR(class VirtualCallStubManagerManager) PTR_VirtualCallStubManagerManager;
typedef VPTR(class IGCHeap)             PTR_IGCHeap;

//
// _UNCHECKED_OBJECTREF is for code that can't deal with DEBUG OBJECTREFs
//
typedef PTR_Object _UNCHECKED_OBJECTREF;
typedef DPTR(PTR_Object) PTR_UNCHECKED_OBJECTREF;

#ifdef USE_CHECKED_OBJECTREFS
class OBJECTREF;
#else
typedef PTR_Object OBJECTREF;
#endif
typedef DPTR(OBJECTREF) PTR_OBJECTREF;
typedef DPTR(PTR_OBJECTREF) PTR_PTR_OBJECTREF;

EXTERN_C Thread* STDCALL GetThread();
BOOL SetThread(Thread*);

// This is a mechanism by which macros can make the Thread pointer available to inner scopes
// that is robust to code changes.  If the outer Thread no longer is available for some reason
// (e.g. code refactoring), this GET_THREAD() macro will fall back to calling GetThread().
const bool CURRENT_THREAD_AVAILABLE = false;
Thread * const CURRENT_THREAD = NULL;
#define GET_THREAD() (CURRENT_THREAD_AVAILABLE ? CURRENT_THREAD : GetThread())

#define MAKE_CURRENT_THREAD_AVAILABLE() \
    Thread * __pThread = GET_THREAD(); \
    MAKE_CURRENT_THREAD_AVAILABLE_EX(__pThread)

#define MAKE_CURRENT_THREAD_AVAILABLE_EX(__pThread) \
    Thread * CURRENT_THREAD = __pThread; \
    const bool CURRENT_THREAD_AVAILABLE = true; \
    (void)CURRENT_THREAD_AVAILABLE; /* silence "local variable initialized but not used" warning */ \

#ifndef DACCESS_COMPILE
EXTERN_C AppDomain* STDCALL GetAppDomain();
#endif //!DACCESS_COMPILE

inline void RetailBreak()  
{
#ifdef _TARGET_X86_
    __asm int 3
#else
    DebugBreak();
#endif
}

extern BOOL isMemoryReadable(const TADDR start, unsigned len);

#ifndef memcpyUnsafe_f 
#define memcpyUnsafe_f

// use this when you want to memcpy something that contains GC refs
FORCEINLINE void* memcpyUnsafe(void *dest, const void *src, size_t len)
{
    WRAPPER_NO_CONTRACT;
    return memcpy(dest, src, len);
}

#endif // !memcpyUnsafe_f

//
// By default logging, and debug GC are enabled under debug
//
// These can be enabled in non-debug by removing the #ifdef _DEBUG
// allowing one to log/check_gc a free build.
//
#if defined(_DEBUG) && !defined(DACCESS_COMPILE) && !defined(CROSSGEN_COMPILE)

    //If memcpy has been defined to PAL_memcpy, we undefine it so that this case
    //can be covered by the if !defined(memcpy) block below
    #ifdef FEATURE_PAL
    #if IS_REDEFINED_IN_PAL(memcpy)
    #undef memcpy
    #endif //IS_REDEFINED_IN_PAL
    #endif //FEATURE_PAL

        // You should be using CopyValueClass if you are doing an memcpy
        // in the CG heap.
    #if !defined(memcpy)
    FORCEINLINE void* memcpyNoGCRefs(void * dest, const void * src, size_t len) {
            WRAPPER_NO_CONTRACT;

            #ifndef FEATURE_PAL
                return memcpy(dest, src, len);
            #else //FEATURE_PAL
                return PAL_memcpy(dest, src, len);
            #endif //FEATURE_PAL
            
        }
    extern "C" void *  __cdecl GCSafeMemCpy(void *, const void *, size_t);
    #define memcpy(dest, src, len) GCSafeMemCpy(dest, src, len)
    #endif // !defined(memcpy)

    #if !defined(CHECK_APP_DOMAIN_LEAKS)
    #define CHECK_APP_DOMAIN_LEAKS 1
    #endif
#else // !_DEBUG && !DACCESS_COMPILE && !CROSSGEN_COMPILE
    FORCEINLINE void* memcpyNoGCRefs(void * dest, const void * src, size_t len) {
            WRAPPER_NO_CONTRACT;
            
            return memcpy(dest, src, len);
        }
#endif // !_DEBUG && !DACCESS_COMPILE && !CROSSGEN_COMPILE

namespace Loader
{
    typedef enum 
    {
        Load, //should load
        DontLoad, //should not load
        SafeLookup  //take no locks, no allocations
    } LoadFlag;
}

// src/inc
#include "utilcode.h"
#include "log.h"
#include "loaderheap.h"
#include "fixuppointer.h"
#include "lazycow.h"

// src/vm
#include "gcenv.interlocked.h"
#include "gcenv.interlocked.inl"

#include "util.hpp"
#include "ibclogger.h"
#include "eepolicy.h"

#include "vars.hpp"
#include "crst.h"
#include "argslot.h"
#include "stublink.h"
#include "cgensys.h"
#include "ceemain.h"
#include "hash.h"
#include "eecontract.h"
#include "pedecoder.h"
#include "sstring.h"
#include "slist.h"

#include "eeconfig.h"

#include "spinlock.h"
#include "objecthandle.h"
#include "declsec.h"

#ifdef FEATURE_COMINTEROP 
#include "stdinterfaces.h"
#endif

#include "typehandle.h"
#include "perfcounters.h"
#include "methodtable.h"
#include "typectxt.h"

#include "eehash.h"

#include "handletable.h"
#include "vars.hpp"
#include "eventstore.hpp"

#include "synch.h"
#include "regdisp.h"
#include "stackframe.h"
#include "gms.h"
#include "stackprobe.h"
#include "fcall.h"
#include "syncblk.h"
#include "gcdesc.h"
#include "specialstatics.h"
#include "object.h"  // <NICE> We should not really need to put this so early... </NICE>
#include "gchelpers.h"
#include "pefile.h"
#include "clrex.h"
#include "clsload.hpp"  // <NICE> We should not really need to put this so early... </NICE>
#include "siginfo.hpp"
#include "binder.h"
#include "jitinterface.h"  // <NICE> We should not really need to put this so early... </NICE>
#include "ceeload.h"
#include "memberload.h"
#include "genericdict.h"
#include "class.h"
#include "codeman.h"
#include "threads.h"
#include "clrex.inl"
#ifdef FEATURE_COMINTEROP
    #include "windowsruntime.h"
    #include "windowsstring.h"
#endif
#include "loaderallocator.hpp"
#include "appdomain.hpp"
#include "appdomain.inl"
#include "assembly.hpp"
#include "pefile.inl"
#include "excep.h"
#include "method.hpp"
#include "callingconvention.h"
#include "frames.h"
#include "qcall.h"
#include "callhelpers.h"

#include "stackwalk.h"
#include "stackingallocator.h"
#include "interoputil.h"
#include "wrappers.h"
#include "dynamicmethod.h"

#include "gcstress.h"

#ifndef DACCESS_COMPILE 

inline VOID UnsafeEEEnterCriticalSection(LPCRITICAL_SECTION lpCriticalSection)
{
    STATIC_CONTRACT_NOTHROW;
    STATIC_CONTRACT_GC_NOTRIGGER;
    STATIC_CONTRACT_CAN_TAKE_LOCK;

    UnsafeEnterCriticalSection(lpCriticalSection);
    INCTHREADLOCKCOUNT();
}

inline VOID UnsafeEELeaveCriticalSection(LPCRITICAL_SECTION lpCriticalSection)
{
    STATIC_CONTRACT_NOTHROW;
    STATIC_CONTRACT_GC_NOTRIGGER;

    UnsafeLeaveCriticalSection(lpCriticalSection);
    DECTHREADLOCKCOUNT();
}

inline BOOL UnsafeEETryEnterCriticalSection(LPCRITICAL_SECTION lpCriticalSection)
{
    STATIC_CONTRACT_NOTHROW;
    STATIC_CONTRACT_GC_NOTRIGGER;
    STATIC_CONTRACT_CAN_TAKE_LOCK;

    BOOL fEnteredCriticalSection = UnsafeTryEnterCriticalSection(lpCriticalSection);
    if(fEnteredCriticalSection)
    {
        INCTHREADLOCKCOUNT();
    }
    return fEnteredCriticalSection;
}

#endif // !DACCESS_COMPILE

HRESULT EnsureRtlFunctions();
HINSTANCE GetModuleInst();

#if defined(_TARGET_X86_) || defined(_TARGET_AMD64_)
//
// Strong memory model. No memory barrier necessary before writing object references into GC heap.
//
#define GCHeapMemoryBarrier()
#else
//
// The weak memory model forces us to raise memory barriers before writing object references into GC heap. This is required
// for both security and to make most managed code written against strong memory model work. Under normal circumstances, this memory 
// barrier is part of GC write barrier. However, there are a few places in the VM that set cards manually without going through 
// regular GC write barrier. These places need to this macro. This macro is usually used before memcpy-like operation followed 
// by SetCardsAfterBulkCopy.
//
#define GCHeapMemoryBarrier() MemoryBarrier()
#endif


// use this when you want to memcpy something that contains GC refs
void memmoveGCRefs(void *dest, const void *src, size_t len);


#if defined(_DEBUG)

// This catches CANNOTTHROW macros that occur outside the scope of a CONTRACT.
// Note that it's important for m_CannotThrowLineNums to be NULL.
struct DummyGlobalContract
{
    int    *m_CannotThrowLineNums; //= NULL;
    LPVOID *m_CannotThrowRecords; //= NULL;
};

extern DummyGlobalContract ___contract;

#endif // defined(_DEBUG)


// All files get to see all of these .inl files to make sure all files
// get the benefit of inlining.
#include "ceeload.inl"
#include "typedesc.inl"
#include "class.inl"
#include "methodtable.inl"
#include "typehandle.inl"
#include "object.inl"
#include "clsload.inl"
#include "domainfile.inl"
#include "handletable.inl"
#include "method.inl"
#include "stackprobe.inl"
#include "syncblk.inl"
#include "threads.inl"
#include "eehash.inl"
#include "mscorcfg.h"
#ifdef FEATURE_COMINTEROP
#include "WinRTRedirector.h"
#include "winrtredirector.inl"
#endif // FEATURE_COMINTEROP

inline HRESULT CreateConfigStreamHelper(LPCWSTR filename, IStream** pOutStream)
{
    CONTRACTL
    {
        NOTHROW;
        GC_NOTRIGGER;
        MODE_ANY;
    }
    CONTRACTL_END

    HRESULT hr =S_OK;

    EX_TRY
    {
        hr = CreateConfigStream( filename, pOutStream);
    }
    EX_CATCH_HRESULT(hr);

    return hr;
}


#if defined(COMMON_TURNED_FPO_ON)
#pragma optimize("", on)        // Go back to command line default optimizations
#undef COMMON_TURNED_FPO_ON
#undef FPO_ON
#endif

extern INT64 g_PauseTime;          // Total duration of all pauses in the runtime
extern Volatile<BOOL> g_IsPaused;   // True if the runtime is Paused for FAS
extern CLREventStatic g_ClrResumeEvent;  // Event fired when the runtime is resumed after a Pause for FAS
INT64 AdditionalWait(INT64 sPauseTime, INT64 sTime, INT64 expDuration);

#endif // !_common_h_