ntdll: Add support for the MEM_RESET flag in VirtualAlloc, with tests.

dlls/kernel32/tests/virtual.c

@@ -284,6 +284,40 @@ static void test_VirtualAlloc(void)
     ok(old_prot == PAGE_READONLY,
         "wrong old protection: got %04x instead of PAGE_READONLY\n", old_prot);
 
+    ok(VirtualQuery(addr1, &info, sizeof(info)) == sizeof(info),
+        "VirtualQuery failed\n");
+    ok(info.RegionSize == 0x1000, "%lx != 0x1000\n", info.RegionSize);
+    ok(info.State == MEM_COMMIT, "%x != MEM_COMMIT\n", info.State);
+    ok(info.Protect == PAGE_READWRITE, "%x != PAGE_READWRITE\n", info.Protect);
+    memset( addr1, 0x55, 20 );
+    ok( *(DWORD *)addr1 == 0x55555555, "wrong data %x\n", *(DWORD *)addr1 );
+
+    addr2 = VirtualAlloc( addr1, 0x1000, MEM_RESET, PAGE_NOACCESS );
+    ok( addr2 == addr1 || broken( !addr2 && GetLastError() == ERROR_INVALID_PARAMETER), /* win9x */
+        "VirtualAlloc failed err %u\n", GetLastError() );
+    ok( *(DWORD *)addr1 == 0x55555555 || *(DWORD *)addr1 == 0, "wrong data %x\n", *(DWORD *)addr1 );
+    if (addr2)
+    {
+        ok(VirtualQuery(addr1, &info, sizeof(info)) == sizeof(info),
+           "VirtualQuery failed\n");
+        ok(info.RegionSize == 0x1000, "%lx != 0x1000\n", info.RegionSize);
+        ok(info.State == MEM_COMMIT, "%x != MEM_COMMIT\n", info.State);
+        ok(info.Protect == PAGE_READWRITE, "%x != PAGE_READWRITE\n", info.Protect);
+
+        addr2 = VirtualAlloc( (char *)addr1 + 0x1000, 0x1000, MEM_RESET, PAGE_NOACCESS );
+        ok( (char *)addr2 == (char *)addr1 + 0x1000, "VirtualAlloc failed\n" );
+
+        ok(VirtualQuery(addr2, &info, sizeof(info)) == sizeof(info),
+           "VirtualQuery failed\n");
+        ok(info.RegionSize == 0xf000, "%lx != 0xf000\n", info.RegionSize);
+        ok(info.State == MEM_RESERVE, "%x != MEM_RESERVE\n", info.State);
+        ok(info.Protect == 0, "%x != 0\n", info.Protect);
+
+        addr2 = VirtualAlloc( (char *)addr1 + 0xf000, 0x2000, MEM_RESET, PAGE_NOACCESS );
+        ok( !addr2, "VirtualAlloc failed\n" );
+        ok( GetLastError() == ERROR_INVALID_ADDRESS, "wrong error %u\n", GetLastError() );
+    }
+
     /* invalid protection values */
     SetLastError(0xdeadbeef);
     addr2 = VirtualAlloc(NULL, 0x1000, MEM_RESERVE, 0);
@@ -329,7 +363,7 @@ static void test_MapViewOfFile(void)
     static const char testfile[] = "testfile.xxx";
     const char *name;
     HANDLE file, mapping, map2;
-    void *ptr, *ptr2;
+    void *ptr, *ptr2, *addr;
     MEMORY_BASIC_INFORMATION info;
     BOOL ret;
 
@@ -700,6 +734,10 @@ static void test_MapViewOfFile(void)
         ok(info.Type == MEM_MAPPED, "Type should have been MEM_MAPPED instead of 0x%x\n", info.Type);
     }
 
+    addr = VirtualAlloc( ptr, MAPPING_SIZE, MEM_RESET, PAGE_READONLY );
+    ok( addr == ptr || broken(!addr && GetLastError() == ERROR_INVALID_PARAMETER), /* win9x */
+        "VirtualAlloc failed with error %u\n", GetLastError() );
+
     ret = VirtualFree( ptr, 0x10000, MEM_DECOMMIT );
     ok( !ret || broken(ret) /* win9x */, "VirtualFree succeeded\n" );
     if (!ret)

dlls/ntdll/virtual.c

@@ -1787,7 +1787,7 @@ NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_
 
     /* Compute the alloc type flags */
 
-    if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
+    if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_RESET)) ||
         (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_TOP_DOWN | MEM_WRITE_WATCH | MEM_RESET)))
     {
         WARN("called with wrong alloc type flags (%08x) !\n", type);
@@ -1804,6 +1804,11 @@ NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_
         status = map_view( &view, base, size, mask, type & MEM_TOP_DOWN, vprot );
         if (status == STATUS_SUCCESS) base = view->base;
     }
+    else if (type & MEM_RESET)
+    {
+        if (!(view = VIRTUAL_FindView( base, size ))) status = STATUS_NOT_MAPPED_VIEW;
+        else madvise( base, size, MADV_DONTNEED );
+    }
     else  /* commit the pages */
     {
         if (!(view = VIRTUAL_FindView( base, size ))) status = STATUS_NOT_MAPPED_VIEW;