[Bug 47079] New: CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, <pid>) fails with error 998 (ERROR_NOACCESS)

https://bugs.winehq.org/show_bug.cgi?id=47079

Bug ID: 47079
           Summary: CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, <pid>)
                    fails with error 998 (ERROR_NOACCESS)
           Product: Wine
           Version: 4.6
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: kernel32
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Hello,

I was testing, on a 64 bit prefix, an application which makes use of
CreateToolhelp32Snapshot() with the TH32CS_SNAPMODULE flag to retrieve a
snapshot of the modules loaded by a specific process (its ID is the second and
last argument to the function).

The application was not working as expected and after debugging it I found out
that CreateToolhelp32Snapshot() returns INVALID_HANDLE_VALUE and GetLastError()
returns 998, which corresponds to ERROR_NOACCESS.

After seeing that CreateToolhelp32Snapshot() succeeds with one of the "native"
Wine processes (e.g. explorer.exe), I discovered that the issue only happens
when the application calling CreateToolhelp32Snapshot() has a different
architecture compared to the target process (32 bit vs 64 bit or vice versa).

Best regards,
Davide

[Bug 47079] CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, <pid>) fails with error 998 (ERROR_NOACCESS)

https://bugs.winehq.org/show_bug.cgi?id=47079

--- Comment #1 from Nikolay Sivov  ---
Could you attach a test application for that issue? Preferably something that
compiles with mingw-w64.

P.S. there is also TH32CS_SNAPMODULE32 that we don't use.

[Bug 47079] CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, <pid>) fails with error 998 (ERROR_NOACCESS)

https://bugs.winehq.org/show_bug.cgi?id=47079

--- Comment #2 from Davide Beatrici  ---
I created a test application:
https://github.com/davidebeatrici/createtoolhelp32snapshot_test