//
// vcruntime_internal.h
//
//      Copyright (c) Microsoft Corporation. All rights reserved.
//
// Declarations and definitions of things used internally by the VCRuntime.
//
#pragma once

#if !defined _VCRT_BUILD && !defined _VCRT_ALLOW_INTERNALS
    // This is an internal C Runtime header file.  It is used when building the
    // C Runtime only.  It is not to be used as a public header file.
    #error ERROR: Use of C Runtime library internal header file.
#endif

#define _WIN32_FUSION 0x0100

#include <vcruntime.h>
#include <vcruntime_startup.h>
#include <vcruntime_string.h>
#include <crtdbg.h>
#include <eh.h>
#include <internal_shared.h>
#include <isa_availability.h>
#include <malloc.h>
#include <stdbool.h>
#include <Windows.h>
#include <evntprov.h>

_CRT_BEGIN_C_HEADER



//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//
// Optimization macros
//
//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// Note:  These macros must match their definitions in the Windows build.
#ifndef BEGIN_PRAGMA_OPTIMIZE_DISABLE
    #define BEGIN_PRAGMA_OPTIMIZE_DISABLE(flags, bug, reason) \
        __pragma(optimize(flags, off))

    #define BEGIN_PRAGMA_OPTIMIZE_ENABLE(flags, bug, reason) \
        __pragma(optimize(flags, on))

    #define END_PRAGMA_OPTIMIZE() \
        __pragma(optimize("", on))
#endif



//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//
// Internal types
//
//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
typedef int (__cdecl* _PIFV)(void);



//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//
// Initialization
//
//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
bool __cdecl __vcrt_initialize_ptd(void);
bool __cdecl __vcrt_uninitialize_ptd(void);

bool __cdecl __vcrt_initialize_locks(void);
bool __cdecl __vcrt_uninitialize_locks(void);



//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//
// ISA Availability
//
//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
extern int __isa_available;

#if defined _M_IX86 || defined _M_X64
    extern int __isa_enabled;
    extern int __favor;
#endif


#if defined _M_ARM64
    // A few global variables initialized during startup and used later
    typedef PVOID (WINAPI *LocateXStateFeatureFn)(PCONTEXT Context, DWORD FeatureId, PDWORD Length);
    extern LocateXStateFeatureFn __locateXStateFeature;
    extern DWORD64 __arm64_xstate_features;

    // SVE related macros and types are not available on all SDK versions.
    // Manually define all those used in this file if XSTATE_MASK_ARM64_SVE is not defined.
    #if !defined(XSTATE_MASK_ARM64_SVE)
    #define XSTATE_ARM64_SVE                    (2)
    #define XSTATE_MASK_ARM64_SVE               (1ui64 << (XSTATE_ARM64_SVE))
    #define CONTEXT_ARM64_XSTATE                (CONTEXT_ARM64 | 0x20L)
    #define CONTEXT_XSTATE                      CONTEXT_ARM64_XSTATE
    typedef struct _XSAVE_ARM64_SVE_HEADER
    {
        DWORD VectorLength;
        DWORD VectorRegisterOffset;
        DWORD PredicateRegisterOffset;
        DWORD Reserved[5];
    } XSAVE_ARM64_SVE_HEADER, *PXSAVE_ARM64_SVE_HEADER;
    #endif
#endif

//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//
// Guard
//
//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
#include <cfguard.h>



//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//
// Multi-threading
//
//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
typedef enum __vcrt_lock_id
{
    __vcrt_undname_lock,
    __vcrt_lock_count
} __vcrt_lock_id;

#define _VCRT_SPINCOUNT 4000

void __cdecl __vcrt_lock(_In_ __vcrt_lock_id _Lock);
void __cdecl __vcrt_unlock(_In_ __vcrt_lock_id _Lock);

//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//
// Telemetry
//
//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
#if !defined _CRT_WINDOWS

    // Telemetry: Invoked when the exe/dll are invoked. There are two different
    // implementations in telemetry.cpp and telemetrydefault.cpp. Because GetModuleFileName
    // is not available for Store apps, we return an empty string in telemetrydefault.cpp
    // when invoked by store apps. For the desktop in telemetry.cpp, it returns the name
    // of the module which invokes main/dll. This method is also responsible for firing the
    // events associated with Tracelogging. This will help with runtime telemetry for analysis.
    void __cdecl __telemetry_main_invoke_trigger(const HINSTANCE instance);

    // Telemetry: Invoked when the exe/dll are shutdown. There are two different
    // implementations in telemetry.cpp and telemetrydefault.cpp. This method is
    // responsible for firing the events associated with Tracelogging. This will
    // help with runtime telemetry for analysis.
    void __cdecl __telemetry_main_return_trigger(const HINSTANCE instance);

    void __cdecl __vcrt_initialize_telemetry_provider(void);

    void __cdecl __vcrt_uninitialize_telemetry_provider(void);

#if defined(_M_ARM64) || defined(_M_ARM64EC) || defined(_M_HYBRID_X86_ARM64)

    extern int __arm64_safe_unaligned_memory_access;

#endif

#endif // !defined _CRT_WINDOWS

//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//
// CoreCRT SEH Encapsulation
//
//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
#ifdef __cplusplus
extern "C++"
{
    template <typename Action>
    auto __vcrt_lock_and_call(__vcrt_lock_id const lock_id, Action&& action)
        -> decltype(action())
    {
        return __crt_seh_guarded_call<decltype(action())>()(
            [lock_id]() { __vcrt_lock(lock_id); },
            action,
            [lock_id]() { __vcrt_unlock(lock_id); });
    }
}
#endif // __cplusplus

// When building the satellite, define __vcrt_ptd to be the satellite-specific implementation, rename the base implementation to __vcrt_ptd_base
#if defined _VCRT_SAT_1
#define RENAME_BASE_PTD(x) x##base
#else
#define RENAME_BASE_PTD(x) x
#endif

//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//
// Per-thread data
//
//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// WARNING WARNING WARNING
// This entire structure is inferred by the satellite DLL from the address of _curexception and
// __ProcessingThrow. Any changes to this structure must continue to allow this to happen
// WARNING WARNING WARNING
typedef struct RENAME_BASE_PTD(__vcrt_ptd)
{
    // C++ Exception Handling (EH) state
    unsigned long      _NLG_dwCode;      // Required by NLG routines
    void (__CRTDECL* _unexpected)(void); // unexpected() routine
    void*              _translator;      // S.E. translator
    void*              _purecall;        // called when pure virtual happens
    void*              _curexception;    // current exception
    void*              _curcontext;      // current exception context
    int                _ProcessingThrow; // for uncaught_exception
    void*              _curexcspec;      // for handling exceptions thrown from std::unexpected
    int                _cxxReThrow;      // true if it's a rethrown C++ exception

    #if defined _M_X64 || defined _M_ARM64 || defined _M_HYBRID
    void*              _pExitContext;
    void*              _pUnwindContext;
    void*              _pFrameInfoChain;
    uintptr_t          _ImageBase;
    uintptr_t          _ThrowImageBase;
    void*              _pForeignException;
    int                _CatchStateInParent;   // Used to link together the catch funclet with the parent. During dispatch contains state associated
                                              // with catch in the parent. During unwind represents the current unwind state that is resumed to
                                              // during collided unwind and used to look for handlers of the throwing dtor.
    #elif defined _M_IX86
    void*              _pFrameInfoChain;
    #endif

} RENAME_BASE_PTD(__vcrt_ptd);

// Represents uninitialized value of _CatchStateInParent
#define INVALID_CATCH_SPECIFIC_STATE -2

// Utilize windows scope index to resolve collided unwind, since the uninitialized value is 0 we subtract the value by 2
// so that a scope index value of 1 maps to a EH state of -1 etc.
#define SCOPE_INDEX_SHIFT_VALUE 2

#if defined _VCRT_SAT_1
typedef struct __vcrt_ptd
{
    int                _CatchStateInParent;   // Used to link together the catch funclet with the parent. During dispatch contains state associated
                                              // with catch in the parent. During unwind represents the current unwind state that is resumed to
                                              // during collided unwind and used to look for handlers of the throwing dtor.
} __vcrt_ptd;

RENAME_BASE_PTD(__vcrt_ptd)* __cdecl RENAME_BASE_PTD(__vcrt_getptd)(void);
RENAME_BASE_PTD(__vcrt_ptd)* __cdecl RENAME_BASE_PTD(__vcrt_getptd_noinit)(void);
#endif

// These functions are defined differently for satellite DLL compilation to get the PTD
// from the base vcruntime DLL.
__vcrt_ptd* __cdecl __vcrt_getptd(void);
__vcrt_ptd* __cdecl __vcrt_getptd_noexit(void);
__vcrt_ptd* __cdecl __vcrt_getptd_noinit(void);
void __cdecl __vcrt_freeptd_for_this_thread(void);
void WINAPI __vcrt_freefls(_Pre_maybenull_ _Post_invalid_ void* _Pfd);

//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//
// Windows API wrappers
//
//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
#if defined _VCRT_ENCLAVE_BUILD

    // When building for Enclave, we directly call the most suitable corresponding API.
    #define __vcrt_FlsAlloc(unreferenced_callback)  TlsAlloc()
    #define __vcrt_FlsFree(fls_index)               TlsFree(fls_index)
    #define __vcrt_FlsGetValue(fls_index)           TlsGetValue(fls_index)
    #define __vcrt_FlsSetValue(fls_index, fls_data) TlsSetValue(fls_index, fls_data)
    #define __vcrt_EncodePointer(ptr)               (ptr)

#else // ^^^ Enclave ^^^ // vvv non-Enclave vvv //

    // We can directly call these APIs.
    #define __vcrt_FlsAlloc(callback)               FlsAlloc(callback)
    #define __vcrt_FlsFree(fls_index)               FlsFree(fls_index)
    #define __vcrt_FlsGetValue(fls_index)           FlsGetValue(fls_index)
    #define __vcrt_FlsSetValue(fls_index, fls_data) FlsSetValue(fls_index, fls_data)
    #define __vcrt_EncodePointer(ptr)               EncodePointer(ptr)

#endif // ^^^ non-Enclave ^^^ //

// These APIs are available on all supported operating systems, but they are not
// defined in WindowsApp.lib.  We rely on these APIs in the statically-linked
// RTC code, which we build into the CRT for Windows Store apps.  To avoid link
// errors in user code, we encapsulate their usage within the VCRuntime DLL.
// When we are MSDK-constrained, these functions simply return failure.
// This functionality is not supported for the enclave vcruntime.
#if defined(_CRT_WINDOWS) || defined(_VCRT_ENCLAVE_BUILD)
    // Windows OS components do not need this layer of indirection.  To avoid
    // dependencies on these exports, we redefine them to map to the real Windows
    // APIs.
    #define __vcrt_GetModuleFileNameW GetModuleFileNameW
    #define __vcrt_GetModuleHandleW   GetModuleHandleW
    #define __vcrt_LoadLibraryExW     LoadLibraryExW
#else // ^^^ _CRT_WINDOWS || _VCRT_ENCLAVE_BUILD ^^^ // vvv Public Runtimes (except Enclave) vvv //
    _Success_(return != 0) _Ret_range_(1, buffer_count)
    DWORD __cdecl __vcrt_GetModuleFileNameW(
        _In_opt_                                                                               HMODULE module_handle,
        _Out_writes_to_(buffer_count, ((return < buffer_count) ? (return + 1) : buffer_count)) LPWSTR  buffer,
        _In_                                                                                   DWORD   buffer_count
        );

#if defined(_CRT_APP) && !defined(_DEBUG)
    _Ret_null_
#else // ^^^ MSDK-constrained ^^^ // vvv GetModuleHandleW is available vvv //
    _When_(file_name == NULL, _Ret_notnull_)
    _When_(file_name != NULL, _Ret_maybenull_)
#endif // ^^^ GetModuleHandleW is available ^^^ //
    HMODULE __cdecl __vcrt_GetModuleHandleW(
        _In_opt_ LPCWSTR file_name
        );

    _Ret_maybenull_
    HMODULE __cdecl __vcrt_LoadLibraryExW(
        _In_       LPCWSTR file_name,
        _Reserved_ HANDLE  file_handle,
        _In_       DWORD   flags
        );
#endif // ^^^ Public Runtimes (except Enclave) ^^^ //


BOOL __cdecl _ValidateImageBase(PBYTE pImageBase);
PIMAGE_SECTION_HEADER __cdecl _FindPESection(PBYTE pImageBase, DWORD_PTR rva);
BOOL __cdecl _IsNonwritableInCurrentImage(void const* pTarget);



// Type info stuff
#ifdef __cplusplus
    struct __type_info_node
    {
        _SLIST_HEADER _Header;
    };

    void __cdecl __std_type_info_destroy_list(__type_info_node* _RootNode);
#endif


// Imports from AppCRT and DesktopCRT that need to be forwarded to the OS-mode global state counterparts when this dll is built as vcruntime_win
#if defined _VCRT_WINDOWS_BUILD && defined _CRT_GLOBAL_STATE_ISOLATION
    _ACRTIMP int __cdecl _o__callnewh(
    _In_ size_t _Size
    );

    #define _callnewh _o__callnewh
#endif

// x86 SSE2 exception filter to fix imprecise exception codes
long __CRTDECL _filter_x86_sse2_floating_point_exception(long);

_CRT_END_C_HEADER