[Bug 57660] New: PEB->ProcessParameters.ImagePathName also includes CommandLine string

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57660

Bug ID: 57660
           Summary: PEB->ProcessParameters.ImagePathName also includes
                    CommandLine string
           Product: Wine
           Version: 10.0-rc5
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ntdll
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 77828
  --> https://bugs.winehq.org/attachment.cgi?id=77828
trace ImagePathName to show bug

PEB->ProcessParameters.ImagePathName somehow gets
PEB->ProcessParameters.CommandLine appended to it. C programs that use null
terminated strings can still use PEB->ProcessParameters.ImagePathName.Buffer
without a problem, however the Zig programming language (which generally use a
pointer + a length) will run into problems.

I added two `TRACE` messages that show the problem quite clearly:

```
0024:trace:environ:build_initial_params params->ImagePathName
L"Z:\home\geemili\code\zig\build\example-dump-stacktrace\main.exe\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000"...
0024:trace:environ:build_initial_params params->ImagePathName
L"Z:\home\geemili\code\zig\build\example-dump-stacktrace\main.exe\0000"Z:\home\geemili\code\zig\build\example-dump-stacktrace\main.e"
```

The above output taken from the output of running `WINEDEBUG=+environ
./loader/wine64 ~/code/zig/build/example-dump-stacktrace/main.exe`.

Though I realized while I was writing this that the length of ImagePathName is
too long even before the CommandLine string is copied over the zeroes.

Discovered while trying to figure out why Zig couldn't print StackTraces under
wine.

- Related issue: https://github.com/ziglang/zig/issues/17535

[Bug 57660] PEB->ProcessParameters.ImagePathName also includes CommandLine string

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57660

Alexandre Julliard  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from Alexandre Julliard  ---
UNICODE_STRING.Length is counting bytes, not characters. You need to divide by
sizeof(WCHAR).

[Bug 57660] PEB->ProcessParameters.ImagePathName also includes CommandLine string

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57660

--- Comment #2 from [e-mail] ---
Ah geez, that'll teach me to file late night bug reports. Sorry about that.

[Bug 57660] PEB->ProcessParameters.ImagePathName also includes CommandLine string

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57660

Austin English  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED

--- Comment #3 from Austin English  ---
Closing.