[PATCH staging 4/4] ntdll: Report unmodified WRITECOPY pages as shared.

[Andrew Wesie]

We also need to clear the modified bit after we clear memory in map_image to
match the behavior of Windows.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=48665
Signed-off-by: Andrew Wesie 
---
 dlls/ntdll/virtual.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/dlls/ntdll/virtual.c b/dlls/ntdll/virtual.c
index dba2e3380c..70eaf8d43f 100644
--- a/dlls/ntdll/virtual.c
+++ b/dlls/ntdll/virtual.c
@@ -1721,6 +1721,8 @@ static NTSTATUS map_image( HANDLE hmapping, ACCESS_MASK access, int fd, int top_
                            ptr + sec->VirtualAddress + file_size,
                            ptr + sec->VirtualAddress + end );
             memset( ptr + sec->VirtualAddress + file_size, 0, end - file_size );
+            /* clear WRITTEN mark so QueryVirtualMemory returns correct values */
+            set_page_vprot_bits( ptr + sec->VirtualAddress + file_size, 1, 0, VPROT_WRITTEN );
         }
     }

@@ -3205,7 +3207,7 @@ static NTSTATUS get_working_set_ex( HANDLE process, LPCVOID addr,
                 (vprot & VPROT_COMMITTED))
         {
             p->VirtualAttributes.Valid = !(vprot & VPROT_GUARD) && (vprot & 0x0f) && (pagemap >> 63);
-            p->VirtualAttributes.Shared = !is_view_valloc( view ) && ((pagemap >> 61) & 1);
+            p->VirtualAttributes.Shared = (!is_view_valloc( view ) && ((pagemap >> 61) & 1)) || ((view->protect & VPROT_WRITECOPY) && !(vprot & VPROT_WRITTEN));
             if (p->VirtualAttributes.Shared && p->VirtualAttributes.Valid)
                 p->VirtualAttributes.ShareCount = 1; /* FIXME */
             if (p->VirtualAttributes.Valid)