* 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
return (cstdstubbuffer_delegating_t*)((char *)iface - FIELD_OFFSET(cstdstubbuffer_delegating_t, stub_buffer));
}
-HRESULT WINAPI CStdStubBuffer_Construct(REFIID riid,
- LPUNKNOWN pUnkServer,
- PCInterfaceName name,
- CInterfaceStubVtbl *vtbl,
- LPPSFACTORYBUFFER pPSFactory,
- LPRPCSTUBBUFFER *ppStub)
+HRESULT CStdStubBuffer_Construct(REFIID riid,
+ LPUNKNOWN pUnkServer,
+ PCInterfaceName name,
+ CInterfaceStubVtbl *vtbl,
+ LPPSFACTORYBUFFER pPSFactory,
+ LPRPCSTUBBUFFER *ppStub)
{
CStdStubBuffer *This;
IUnknown *pvServer;
{
DWORD ref;
DWORD size;
- void **methods;
IUnknownVtbl vtbl;
/* remaining entries in vtbl */
} ref_counted_vtbl;
-static struct
-{
- ref_counted_vtbl *table;
-} current_vtbl;
+static ref_counted_vtbl *current_vtbl;
static HRESULT WINAPI delegating_QueryInterface(IUnknown *pUnk, REFIID iid, void **ppv)
{
- *ppv = (void *)pUnk;
+ *ppv = pUnk;
return S_OK;
}
} vtbl_method_t;
#include "poppack.h"
-static void fill_table(IUnknownVtbl *vtbl, void **methods, DWORD num)
+#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 )
{
- vtbl_method_t *method;
- void **entry;
- DWORD i;
+ unsigned int i;
+ vtbl_method_t *prev, *block;
+
+ 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++)
+ {
+ block[i].mov1 = 0x0424448b;
+ block[i].mov2 = 0x408b;
+ block[i].sixteen = 0x10;
+ block[i].mov3 = 0x04244489;
+ block[i].mov4 = 0x008b;
+ block[i].mov5 = 0x808b;
+ block[i].offset = (BLOCK_SIZE * num + i + 3) << 2;
+ block[i].jmp = 0xe0ff;
+ block[i].pad[0] = 0x8d;
+ block[i].pad[1] = 0x76;
+ block[i].pad[2] = 0x00;
+ }
+ VirtualProtect( block, BLOCK_SIZE * sizeof(*block), PAGE_EXECUTE_READ, NULL );
+ 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;
+}
- method = (vtbl_method_t*)methods;
- entry = (void**)(vtbl + 1);
+BOOL fill_delegated_proxy_table(IUnknownVtbl *vtbl, DWORD num)
+{
+ const void **entry = (const void **)(vtbl + 1);
+ DWORD i, j;
- for(i = 3; i < num; i++)
+ 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++)
{
- *entry = method;
- method->mov1 = 0x0424448b;
- method->mov2 = 0x408b;
- method->sixteen = 0x10;
- method->mov3 = 0x04244489;
- method->mov4 = 0x008b;
- method->mov5 = 0x808b;
- method->offset = i << 2;
- method->jmp = 0xe0ff;
- method->pad[0] = 0x8d;
- method->pad[1] = 0x76;
- method->pad[2] = 0x00;
-
- method++;
- entry++;
+ 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;
}
#else /* __i386__ */
-typedef struct {int dummy;} vtbl_method_t;
-static void fill_table(IUnknownVtbl *vtbl, void **methods, DWORD num)
+static BOOL fill_delegated_stub_table(IUnknownVtbl *vtbl, DWORD num)
{
ERR("delegated stubs are not supported on this architecture\n");
+ return FALSE;
+}
+
+BOOL fill_delegated_proxy_table(IUnknownVtbl *vtbl, DWORD num)
+{
+ ERR("delegated proxies are not supported on this architecture\n");
+ return FALSE;
}
#endif /* __i386__ */
-void create_delegating_vtbl(DWORD num_methods)
+static IUnknownVtbl *get_delegating_vtbl(DWORD num_methods)
{
- TRACE("%d\n", num_methods);
- if(num_methods <= 3)
- {
- ERR("should have more than %d methods\n", num_methods);
- return;
- }
+ IUnknownVtbl *ret;
+
+ if (num_methods < 256) num_methods = 256; /* avoid frequent reallocations */
EnterCriticalSection(&delegating_vtbl_section);
- if(!current_vtbl.table || num_methods > current_vtbl.table->size)
+
+ if(!current_vtbl || num_methods > current_vtbl->size)
{
- DWORD size;
- DWORD old_protect;
- if(current_vtbl.table && current_vtbl.table->ref == 0)
+ 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");
- VirtualFree(current_vtbl.table->methods, 0, MEM_RELEASE);
- HeapFree(GetProcessHeap(), 0, current_vtbl.table);
+ HeapFree(GetProcessHeap(), 0, current_vtbl);
}
- size = (num_methods - 3) * sizeof(vtbl_method_t);
- current_vtbl.table = HeapAlloc(GetProcessHeap(), 0, FIELD_OFFSET(ref_counted_vtbl, vtbl) + num_methods * sizeof(void*));
- current_vtbl.table->ref = 0;
- current_vtbl.table->size = num_methods;
- current_vtbl.table->methods = VirtualAlloc(NULL, size, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
- fill_table(¤t_vtbl.table->vtbl, current_vtbl.table->methods, num_methods);
- VirtualProtect(current_vtbl.table->methods, size, PAGE_EXECUTE_READ, &old_protect);
+ current_vtbl = table;
}
- LeaveCriticalSection(&delegating_vtbl_section);
-}
-static IUnknownVtbl *get_delegating_vtbl(void)
-{
- IUnknownVtbl *ret;
-
- EnterCriticalSection(&delegating_vtbl_section);
- current_vtbl.table->ref++;
- ret = ¤t_vtbl.table->vtbl;
+ current_vtbl->ref++;
+ ret = ¤t_vtbl->vtbl;
LeaveCriticalSection(&delegating_vtbl_section);
return ret;
}
EnterCriticalSection(&delegating_vtbl_section);
table->ref--;
TRACE("ref now %d\n", table->ref);
- if(table->ref == 0 && table != current_vtbl.table)
+ if(table->ref == 0 && table != current_vtbl)
{
TRACE("... and we're not current so free'ing\n");
- VirtualFree(current_vtbl.table->methods, 0, MEM_RELEASE);
HeapFree(GetProcessHeap(), 0, table);
}
LeaveCriticalSection(&delegating_vtbl_section);
}
-HRESULT WINAPI CStdStubBuffer_Delegating_Construct(REFIID riid,
- LPUNKNOWN pUnkServer,
- PCInterfaceName name,
- CInterfaceStubVtbl *vtbl,
- REFIID delegating_iid,
- LPPSFACTORYBUFFER pPSFactory,
- LPRPCSTUBBUFFER *ppStub)
+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;
return E_OUTOFMEMORY;
}
- This->base_obj = get_delegating_vtbl();
+ This->base_obj = get_delegating_vtbl( vtbl->header.DispatchTableCount );
r = create_stub(delegating_iid, (IUnknown*)&This->base_obj, &This->base_stub);
if(FAILED(r))
{
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