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/*
* COM stub (CStdStubBuffer) implementation
*
* Copyright 2001 Ove Kåven, TransGaming Technologies
* Copyright 2009 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "excpt.h"
#include "objbase.h"
#include "rpcproxy.h"
#include "wine/debug.h"
#include "wine/exception.h"
#include "cpsf.h"
WINE_DEFAULT_DEBUG_CHANNEL(ole);
#define STUB_HEADER(This) (((const CInterfaceStubHeader*)((This)->lpVtbl))[-1])
static LONG WINAPI stub_filter(EXCEPTION_POINTERS *eptr)
{
if (eptr->ExceptionRecord->ExceptionFlags & EXCEPTION_NONCONTINUABLE)
return EXCEPTION_CONTINUE_SEARCH;
return EXCEPTION_EXECUTE_HANDLER;
}
static inline cstdstubbuffer_delegating_t *impl_from_delegating( IRpcStubBuffer *iface )
{
return CONTAINING_RECORD(iface, cstdstubbuffer_delegating_t, stub_buffer);
}
HRESULT CStdStubBuffer_Construct(REFIID riid,
LPUNKNOWN pUnkServer,
PCInterfaceName name,
CInterfaceStubVtbl *vtbl,
LPPSFACTORYBUFFER pPSFactory,
LPRPCSTUBBUFFER *ppStub)
{
CStdStubBuffer *This;
IUnknown *pvServer;
HRESULT r;
TRACE("(%p,%p,%p,%p) %s\n", pUnkServer, vtbl, pPSFactory, ppStub, name);
TRACE("iid=%s\n", debugstr_guid(vtbl->header.piid));
TRACE("vtbl=%p\n", &vtbl->Vtbl);
if (!IsEqualGUID(vtbl->header.piid, riid)) {
ERR("IID mismatch during stub creation\n");
return RPC_E_UNEXPECTED;
}
r = IUnknown_QueryInterface(pUnkServer, riid, (void**)&pvServer);
if(FAILED(r))
return r;
This = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(CStdStubBuffer));
if (!This) {
IUnknown_Release(pvServer);
return E_OUTOFMEMORY;
}
This->lpVtbl = &vtbl->Vtbl;
This->RefCount = 1;
This->pvServerObject = pvServer;
This->pPSFactory = pPSFactory;
*ppStub = (LPRPCSTUBBUFFER)This;
IPSFactoryBuffer_AddRef(pPSFactory);
return S_OK;
}
static CRITICAL_SECTION delegating_vtbl_section;
static CRITICAL_SECTION_DEBUG critsect_debug =
{
0, 0, &delegating_vtbl_section,
{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": delegating_vtbl_section") }
};
static CRITICAL_SECTION delegating_vtbl_section = { &critsect_debug, -1, 0, 0, 0, 0 };
typedef struct
{
DWORD ref;
DWORD size;
IUnknownVtbl vtbl;
/* remaining entries in vtbl */
} ref_counted_vtbl;
static ref_counted_vtbl *current_vtbl;
static HRESULT WINAPI delegating_QueryInterface(IUnknown *pUnk, REFIID iid, void **ppv)
{
*ppv = pUnk;
return S_OK;
}
static ULONG WINAPI delegating_AddRef(IUnknown *pUnk)
{
return 1;
}
static ULONG WINAPI delegating_Release(IUnknown *pUnk)
{
return 1;
}
/* The idea here is to replace the first param on the stack
ie. This (which will point to cstdstubbuffer_delegating_t)
with This->stub_buffer.pvServerObject and then jump to the
relevant offset in This->stub_buffer.pvServerObject's vtbl.
*/
#ifdef __i386__
#include "pshpack1.h"
typedef struct {
BYTE mov1[4]; /* mov 0x4(%esp),%eax 8b 44 24 04 */
BYTE mov2[3]; /* mov 0x10(%eax),%eax 8b 40 10 */
BYTE mov3[4]; /* mov %eax,0x4(%esp) 89 44 24 04 */
BYTE mov4[2]; /* mov (%eax),%eax 8b 00 */
BYTE mov5[2]; /* jmp *offset(%eax) ff a0 offset */
DWORD offset;
BYTE pad[1]; /* nop 90 */
} vtbl_method_t;
#include "poppack.h"
static const BYTE opcodes[20] = { 0x8b, 0x44, 0x24, 0x04, 0x8b, 0x40, 0x10, 0x89, 0x44, 0x24, 0x04,
0x8b, 0x00, 0xff, 0xa0, 0, 0, 0, 0, 0x90 };
#elif defined(__x86_64__)
#include "pshpack1.h"
typedef struct
{
BYTE mov1[4]; /* movq 0x20(%rcx),%rcx 48 8b 49 20 */
BYTE mov2[3]; /* movq (%rcx),%rax 48 8b 01 */
BYTE jmp[2]; /* jmp *offset(%rax) ff a0 offset */
DWORD offset;
BYTE pad[3]; /* lea 0x0(%rsi),%rsi 48 8d 36 */
} vtbl_method_t;
#include "poppack.h"
static const BYTE opcodes[16] = { 0x48, 0x8b, 0x49, 0x20, 0x48, 0x8b, 0x01,
0xff, 0xa0, 0, 0, 0, 0, 0x48, 0x8d, 0x36 };
#elif defined(__arm__)
static const DWORD opcodes[] =
{
0xe52d4004, /* push {r4} */
0xe5900010, /* ldr r0, [r0, #16] */
0xe5904000, /* ldr r4, [r0] */
0xe59fc008, /* ldr ip, [pc, #8] */
0xe08cc004, /* add ip, ip, r4 */
0xe49d4004, /* pop {r4} */
0xe59cf000 /* ldr pc, [ip] */
};
typedef struct
{
DWORD opcodes[ARRAY_SIZE(opcodes)];
DWORD offset;
} vtbl_method_t;
#elif defined(__aarch64__)
static const DWORD opcodes[] =
{
0xf9401000, /* ldr x0, [x0,#32] */
0xf9400010, /* ldr x16, [x0] */
0x18000071, /* ldr w17, offset */
0xf8716a10, /* ldr x16, [x16,x17] */
0xd61f0200 /* br x16 */
};
typedef struct
{
DWORD opcodes[ARRAY_SIZE(opcodes)];
DWORD offset;
} vtbl_method_t;
#else
#warning You must implement delegated proxies/stubs for your CPU
typedef struct
{
DWORD offset;
} vtbl_method_t;
static const BYTE opcodes[1];
#endif
#define BLOCK_SIZE 1024
#define MAX_BLOCKS 64 /* 64k methods should be enough for anybody */
static const vtbl_method_t *method_blocks[MAX_BLOCKS];
static const vtbl_method_t *allocate_block( unsigned int num )
{
unsigned int i;
vtbl_method_t *prev, *block;
DWORD oldprot;
block = VirtualAlloc( NULL, BLOCK_SIZE * sizeof(*block),
MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE );
if (!block) return NULL;
for (i = 0; i < BLOCK_SIZE; i++)
{
memcpy( &block[i], opcodes, sizeof(opcodes) );
block[i].offset = (BLOCK_SIZE * num + i + 3) * sizeof(void *);
}
VirtualProtect( block, BLOCK_SIZE * sizeof(*block), PAGE_EXECUTE_READ, &oldprot );
prev = InterlockedCompareExchangePointer( (void **)&method_blocks[num], block, NULL );
if (prev) /* someone beat us to it */
{
VirtualFree( block, 0, MEM_RELEASE );
block = prev;
}
return block;
}
static BOOL fill_delegated_stub_table(IUnknownVtbl *vtbl, DWORD num)
{
const void **entry = (const void **)(vtbl + 1);
DWORD i, j;
if (num - 3 > BLOCK_SIZE * MAX_BLOCKS)
{
FIXME( "%u methods not supported\n", num );
return FALSE;
}
vtbl->QueryInterface = delegating_QueryInterface;
vtbl->AddRef = delegating_AddRef;
vtbl->Release = delegating_Release;
for (i = 0; i < (num - 3 + BLOCK_SIZE - 1) / BLOCK_SIZE; i++)
{
const vtbl_method_t *block = method_blocks[i];
if (!block && !(block = allocate_block( i ))) return FALSE;
for (j = 0; j < BLOCK_SIZE && j < num - 3 - i * BLOCK_SIZE; j++) *entry++ = &block[j];
}
return TRUE;
}
BOOL fill_delegated_proxy_table(IUnknownVtbl *vtbl, DWORD num)
{
const void **entry = (const void **)(vtbl + 1);
DWORD i, j;
if (num - 3 > BLOCK_SIZE * MAX_BLOCKS)
{
FIXME( "%u methods not supported\n", num );
return FALSE;
}
vtbl->QueryInterface = IUnknown_QueryInterface_Proxy;
vtbl->AddRef = IUnknown_AddRef_Proxy;
vtbl->Release = IUnknown_Release_Proxy;
for (i = 0; i < (num - 3 + BLOCK_SIZE - 1) / BLOCK_SIZE; i++)
{
const vtbl_method_t *block = method_blocks[i];
if (!block && !(block = allocate_block( i ))) return FALSE;
for (j = 0; j < BLOCK_SIZE && j < num - 3 - i * BLOCK_SIZE; j++, entry++)
if (!*entry) *entry = &block[j];
}
return TRUE;
}
IUnknownVtbl *get_delegating_vtbl(DWORD num_methods)
{
IUnknownVtbl *ret;
if (num_methods < 256) num_methods = 256; /* avoid frequent reallocations */
EnterCriticalSection(&delegating_vtbl_section);
if(!current_vtbl || num_methods > current_vtbl->size)
{
ref_counted_vtbl *table = HeapAlloc(GetProcessHeap(), 0,
FIELD_OFFSET(ref_counted_vtbl, vtbl) + num_methods * sizeof(void*));
if (!table)
{
LeaveCriticalSection(&delegating_vtbl_section);
return NULL;
}
table->ref = 0;
table->size = num_methods;
fill_delegated_stub_table(&table->vtbl, num_methods);
if (current_vtbl && current_vtbl->ref == 0)
{
TRACE("freeing old table\n");
HeapFree(GetProcessHeap(), 0, current_vtbl);
}
current_vtbl = table;
}
current_vtbl->ref++;
ret = &current_vtbl->vtbl;
LeaveCriticalSection(&delegating_vtbl_section);
return ret;
}
void release_delegating_vtbl(IUnknownVtbl *vtbl)
{
ref_counted_vtbl *table = (ref_counted_vtbl*)((DWORD *)vtbl - 1);
EnterCriticalSection(&delegating_vtbl_section);
table->ref--;
TRACE("ref now %d\n", table->ref);
if(table->ref == 0 && table != current_vtbl)
{
TRACE("... and we're not current so free'ing\n");
HeapFree(GetProcessHeap(), 0, table);
}
LeaveCriticalSection(&delegating_vtbl_section);
}
HRESULT CStdStubBuffer_Delegating_Construct(REFIID riid,
LPUNKNOWN pUnkServer,
PCInterfaceName name,
CInterfaceStubVtbl *vtbl,
REFIID delegating_iid,
LPPSFACTORYBUFFER pPSFactory,
LPRPCSTUBBUFFER *ppStub)
{
cstdstubbuffer_delegating_t *This;
IUnknown *pvServer;
HRESULT r;
TRACE("(%p,%p,%p,%p) %s\n", pUnkServer, vtbl, pPSFactory, ppStub, name);
TRACE("iid=%s delegating to %s\n", debugstr_guid(vtbl->header.piid), debugstr_guid(delegating_iid));
TRACE("vtbl=%p\n", &vtbl->Vtbl);
if (!IsEqualGUID(vtbl->header.piid, riid))
{
ERR("IID mismatch during stub creation\n");
return RPC_E_UNEXPECTED;
}
r = IUnknown_QueryInterface(pUnkServer, riid, (void**)&pvServer);
if(FAILED(r)) return r;
This = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*This));
if (!This)
{
IUnknown_Release(pvServer);
return E_OUTOFMEMORY;
}
This->base_obj = get_delegating_vtbl( vtbl->header.DispatchTableCount );
r = create_stub(delegating_iid, (IUnknown*)&This->base_obj, &This->base_stub);
if(FAILED(r))
{
release_delegating_vtbl(This->base_obj);
HeapFree(GetProcessHeap(), 0, This);
IUnknown_Release(pvServer);
return r;
}
This->stub_buffer.lpVtbl = &vtbl->Vtbl;
This->stub_buffer.RefCount = 1;
This->stub_buffer.pvServerObject = pvServer;
This->stub_buffer.pPSFactory = pPSFactory;
*ppStub = (LPRPCSTUBBUFFER)&This->stub_buffer;
IPSFactoryBuffer_AddRef(pPSFactory);
return S_OK;
}
HRESULT WINAPI CStdStubBuffer_QueryInterface(LPRPCSTUBBUFFER iface,
REFIID riid,
LPVOID *obj)
{
CStdStubBuffer *This = (CStdStubBuffer *)iface;
TRACE("(%p)->QueryInterface(%s,%p)\n",This,debugstr_guid(riid),obj);
if (IsEqualIID(&IID_IUnknown, riid) ||
IsEqualIID(&IID_IRpcStubBuffer, riid))
{
IRpcStubBuffer_AddRef(iface);
*obj = iface;
return S_OK;
}
*obj = NULL;
return E_NOINTERFACE;
}
ULONG WINAPI CStdStubBuffer_AddRef(LPRPCSTUBBUFFER iface)
{
CStdStubBuffer *This = (CStdStubBuffer *)iface;
TRACE("(%p)->AddRef()\n",This);
return InterlockedIncrement(&This->RefCount);
}
ULONG WINAPI NdrCStdStubBuffer_Release(LPRPCSTUBBUFFER iface,
LPPSFACTORYBUFFER pPSF)
{
CStdStubBuffer *This = (CStdStubBuffer *)iface;
ULONG refs;
TRACE("(%p)->Release()\n",This);
refs = InterlockedDecrement(&This->RefCount);
if (!refs)
{
/* test_Release shows that native doesn't call Disconnect here.
We'll leave it in for the time being. */
IRpcStubBuffer_Disconnect(iface);
IPSFactoryBuffer_Release(pPSF);
HeapFree(GetProcessHeap(),0,This);
}
return refs;
}
ULONG WINAPI NdrCStdStubBuffer2_Release(LPRPCSTUBBUFFER iface,
LPPSFACTORYBUFFER pPSF)
{
cstdstubbuffer_delegating_t *This = impl_from_delegating( iface );
ULONG refs;
TRACE("(%p)->Release()\n", This);
refs = InterlockedDecrement(&This->stub_buffer.RefCount);
if (!refs)
{
/* Just like NdrCStdStubBuffer_Release, we shouldn't call
Disconnect here */
IRpcStubBuffer_Disconnect((IRpcStubBuffer *)&This->stub_buffer);
IRpcStubBuffer_Release(This->base_stub);
release_delegating_vtbl(This->base_obj);
IPSFactoryBuffer_Release(pPSF);
HeapFree(GetProcessHeap(), 0, This);
}
return refs;
}
HRESULT WINAPI CStdStubBuffer_Connect(LPRPCSTUBBUFFER iface,
LPUNKNOWN lpUnkServer)
{
CStdStubBuffer *This = (CStdStubBuffer *)iface;
HRESULT r;
IUnknown *new = NULL;
TRACE("(%p)->Connect(%p)\n",This,lpUnkServer);
r = IUnknown_QueryInterface(lpUnkServer, STUB_HEADER(This).piid, (void**)&new);
new = InterlockedExchangePointer((void**)&This->pvServerObject, new);
if(new)
IUnknown_Release(new);
return r;
}
void WINAPI CStdStubBuffer_Disconnect(LPRPCSTUBBUFFER iface)
{
CStdStubBuffer *This = (CStdStubBuffer *)iface;
IUnknown *old;
TRACE("(%p)->Disconnect()\n",This);
old = InterlockedExchangePointer((void**)&This->pvServerObject, NULL);
if(old)
IUnknown_Release(old);
}
HRESULT WINAPI CStdStubBuffer_Invoke(LPRPCSTUBBUFFER iface,
PRPCOLEMESSAGE pMsg,
LPRPCCHANNELBUFFER pChannel)
{
CStdStubBuffer *This = (CStdStubBuffer *)iface;
DWORD dwPhase = STUB_UNMARSHAL;
HRESULT hr = S_OK;
TRACE("(%p)->Invoke(%p,%p)\n",This,pMsg,pChannel);
__TRY
{
if (STUB_HEADER(This).pDispatchTable)
STUB_HEADER(This).pDispatchTable[pMsg->iMethod](iface, pChannel, (PRPC_MESSAGE)pMsg, &dwPhase);
else /* pure interpreted */
NdrStubCall2(iface, pChannel, (PRPC_MESSAGE)pMsg, &dwPhase);
}
__EXCEPT(stub_filter)
{
DWORD dwExceptionCode = GetExceptionCode();
WARN("a stub call failed with exception 0x%08x (%d)\n", dwExceptionCode, dwExceptionCode);
if (FAILED(dwExceptionCode))
hr = dwExceptionCode;
else
hr = HRESULT_FROM_WIN32(dwExceptionCode);
}
__ENDTRY
return hr;
}
LPRPCSTUBBUFFER WINAPI CStdStubBuffer_IsIIDSupported(LPRPCSTUBBUFFER iface,
REFIID riid)
{
CStdStubBuffer *This = (CStdStubBuffer *)iface;
TRACE("(%p)->IsIIDSupported(%s)\n",This,debugstr_guid(riid));
return IsEqualGUID(STUB_HEADER(This).piid, riid) ? iface : NULL;
}
ULONG WINAPI CStdStubBuffer_CountRefs(LPRPCSTUBBUFFER iface)
{
CStdStubBuffer *This = (CStdStubBuffer *)iface;
TRACE("(%p)->CountRefs()\n",This);
return This->RefCount;
}
HRESULT WINAPI CStdStubBuffer_DebugServerQueryInterface(LPRPCSTUBBUFFER iface,
LPVOID *ppv)
{
CStdStubBuffer *This = (CStdStubBuffer *)iface;
TRACE("(%p)->DebugServerQueryInterface(%p)\n",This,ppv);
return S_OK;
}
void WINAPI CStdStubBuffer_DebugServerRelease(LPRPCSTUBBUFFER iface,
LPVOID pv)
{
CStdStubBuffer *This = (CStdStubBuffer *)iface;
TRACE("(%p)->DebugServerRelease(%p)\n",This,pv);
}
const IRpcStubBufferVtbl CStdStubBuffer_Vtbl =
{
CStdStubBuffer_QueryInterface,
CStdStubBuffer_AddRef,
NULL,
CStdStubBuffer_Connect,
CStdStubBuffer_Disconnect,
CStdStubBuffer_Invoke,
CStdStubBuffer_IsIIDSupported,
CStdStubBuffer_CountRefs,
CStdStubBuffer_DebugServerQueryInterface,
CStdStubBuffer_DebugServerRelease
};
static HRESULT WINAPI CStdStubBuffer_Delegating_Connect(LPRPCSTUBBUFFER iface,
LPUNKNOWN lpUnkServer)
{
cstdstubbuffer_delegating_t *This = impl_from_delegating(iface);
HRESULT r;
TRACE("(%p)->Connect(%p)\n", This, lpUnkServer);
r = CStdStubBuffer_Connect(iface, lpUnkServer);
if(SUCCEEDED(r))
r = IRpcStubBuffer_Connect(This->base_stub, (IUnknown*)&This->base_obj);
return r;
}
static void WINAPI CStdStubBuffer_Delegating_Disconnect(LPRPCSTUBBUFFER iface)
{
cstdstubbuffer_delegating_t *This = impl_from_delegating(iface);
TRACE("(%p)->Disconnect()\n", This);
IRpcStubBuffer_Disconnect(This->base_stub);
CStdStubBuffer_Disconnect(iface);
}
static ULONG WINAPI CStdStubBuffer_Delegating_CountRefs(LPRPCSTUBBUFFER iface)
{
cstdstubbuffer_delegating_t *This = impl_from_delegating(iface);
ULONG ret;
TRACE("(%p)->CountRefs()\n", This);
ret = CStdStubBuffer_CountRefs(iface);
ret += IRpcStubBuffer_CountRefs(This->base_stub);
return ret;
}
const IRpcStubBufferVtbl CStdStubBuffer_Delegating_Vtbl =
{
CStdStubBuffer_QueryInterface,
CStdStubBuffer_AddRef,
NULL,
CStdStubBuffer_Delegating_Connect,
CStdStubBuffer_Delegating_Disconnect,
CStdStubBuffer_Invoke,
CStdStubBuffer_IsIIDSupported,
CStdStubBuffer_Delegating_CountRefs,
CStdStubBuffer_DebugServerQueryInterface,
CStdStubBuffer_DebugServerRelease
};
const MIDL_SERVER_INFO *CStdStubBuffer_GetServerInfo(IRpcStubBuffer *iface)
{
CStdStubBuffer *This = (CStdStubBuffer *)iface;
return STUB_HEADER(This).pServerInfo;
}
/************************************************************************
* NdrStubForwardingFunction [RPCRT4.@]
*/
void __RPC_STUB NdrStubForwardingFunction( IRpcStubBuffer *iface, IRpcChannelBuffer *pChannel,
PRPC_MESSAGE pMsg, DWORD *pdwStubPhase )
{
/* Note pMsg is passed intact since RPCOLEMESSAGE is basically a RPC_MESSAGE. */
cstdstubbuffer_delegating_t *This = impl_from_delegating(iface);
HRESULT r = IRpcStubBuffer_Invoke(This->base_stub, (RPCOLEMESSAGE*)pMsg, pChannel);
if(FAILED(r)) RpcRaiseException(r);
return;
}
/***********************************************************************
* NdrStubInitialize [RPCRT4.@]
*/
void WINAPI NdrStubInitialize(PRPC_MESSAGE pRpcMsg,
PMIDL_STUB_MESSAGE pStubMsg,
PMIDL_STUB_DESC pStubDescriptor,
LPRPCCHANNELBUFFER pRpcChannelBuffer)
{
TRACE("(%p,%p,%p,%p)\n", pRpcMsg, pStubMsg, pStubDescriptor, pRpcChannelBuffer);
NdrServerInitializeNew(pRpcMsg, pStubMsg, pStubDescriptor);
pStubMsg->pRpcChannelBuffer = pRpcChannelBuffer;
IRpcChannelBuffer_GetDestCtx(pStubMsg->pRpcChannelBuffer,
&pStubMsg->dwDestContext,
&pStubMsg->pvDestContext);
}
/***********************************************************************
* NdrStubGetBuffer [RPCRT4.@]
*/
void WINAPI NdrStubGetBuffer(LPRPCSTUBBUFFER iface,
LPRPCCHANNELBUFFER pRpcChannelBuffer,
PMIDL_STUB_MESSAGE pStubMsg)
{
CStdStubBuffer *This = (CStdStubBuffer *)iface;
HRESULT hr;
TRACE("(%p, %p, %p)\n", This, pRpcChannelBuffer, pStubMsg);
pStubMsg->RpcMsg->BufferLength = pStubMsg->BufferLength;
hr = IRpcChannelBuffer_GetBuffer(pRpcChannelBuffer,
(RPCOLEMESSAGE *)pStubMsg->RpcMsg, STUB_HEADER(This).piid);
if (FAILED(hr))
{
RpcRaiseException(hr);
return;
}
pStubMsg->Buffer = pStubMsg->RpcMsg->Buffer;
}
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