ntdll: Add block padding when HEAP_ADD_USER_INFO flag is set.

dlls/kernel32/tests/heap.c

@@ -2277,14 +2277,13 @@ static void test_block_layout( HANDLE heap, DWORD global_flags, DWORD heap_flags
         expect_size = max( alloc_size, 2 * sizeof(void *) );
         expect_size = ALIGN_BLOCK_SIZE( expect_size + extra_size + 2 * sizeof(void *) );
         diff = min( llabs( ptr2 - ptr1 ), llabs( ptr1 - ptr0 ) );
-        todo_wine
         ok( diff == expect_size, "got diff %#Ix\n", diff );
 
         ok( !memcmp( ptr0 + alloc_size, tail_buf, tail_size ), "missing block tail\n" );
         ok( !memcmp( ptr1 + alloc_size, tail_buf, tail_size ), "missing block tail\n" );
         ok( !memcmp( ptr2 + alloc_size, tail_buf, tail_size ), "missing block tail\n" );
 
-        todo_wine
+        todo_wine_if( global_flags & FLG_HEAP_ENABLE_FREE_CHECK )
         ok( !memcmp( ptr0 + alloc_size + tail_size, padd_buf, 2 * sizeof(void *) ), "unexpected padding\n" );
 
         tmp_ptr = (void *)0xdeadbeef;

dlls/ntdll/heap.c

@@ -212,6 +212,7 @@ C_ASSERT( offsetof(HEAP, subheap) <= COMMIT_MASK );
 
 /* some undocumented flags (names are made up) */
 #define HEAP_PRIVATE          0x00001000
+#define HEAP_ADD_USER_INFO    0x00000100
 #define HEAP_PAGE_ALLOCS      0x01000000
 #define HEAP_VALIDATE         0x10000000
 #define HEAP_VALIDATE_ALL     0x20000000
@@ -451,7 +452,7 @@ static RTL_CRITICAL_SECTION_DEBUG process_heap_cs_debug =
 static inline ULONG heap_get_flags( const HEAP *heap, ULONG flags )
 {
     if (flags & (HEAP_TAIL_CHECKING_ENABLED | HEAP_FREE_CHECKING_ENABLED)) flags |= HEAP_CHECKING_ENABLED;
-    flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY | HEAP_REALLOC_IN_PLACE_ONLY | HEAP_CHECKING_ENABLED;
+    flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY | HEAP_REALLOC_IN_PLACE_ONLY | HEAP_CHECKING_ENABLED | HEAP_ADD_USER_INFO;
     return heap->flags | flags;
 }
 
@@ -1476,7 +1477,7 @@ HANDLE WINAPI RtlDestroyHeap( HANDLE heap )
 
 static SIZE_T heap_get_block_size( HEAP *heap, ULONG flags, SIZE_T size )
 {
-    static const ULONG padd_flags = HEAP_VALIDATE | HEAP_VALIDATE_ALL | HEAP_VALIDATE_PARAMS;
+    static const ULONG padd_flags = HEAP_VALIDATE | HEAP_VALIDATE_ALL | HEAP_VALIDATE_PARAMS | HEAP_ADD_USER_INFO;
     static const ULONG check_flags = HEAP_TAIL_CHECKING_ENABLED | HEAP_FREE_CHECKING_ENABLED | HEAP_CHECKING_ENABLED;
     SIZE_T overhead;