[Bug 56223] New: winedbg: crashes after loading gecko debug information

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56223

Bug ID: 56223
           Summary: winedbg: crashes after loading gecko debug information
           Product: Wine
           Version: 9.0
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: dbghelp
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 75929
  --> https://bugs.winehq.org/attachment.cgi?id=75929
stdout of application and winedbg, backtrace for handled and unhandled SIGSEGV

Looking at 56213 gives a crash ending in xul.dll.
Therefore I put the xul.pdb from wine-gecko-2.47.4-x86-pdb.tar.xz
into the directory of xul.dll.

This leads to a crashing winedbg.exe.
I think the address space gets exhausted, because the xul.pdb is 500 MB,
and htop shows for a crashing winedbg.exe VIRT=4072M RES=1588M.

This comes with a few of following lines:
err:virtual:allocate_virtual_memory out of memory for allocation, base (nil)
size 003f4000

But also this line is visible:
err:dbghelp_msc:pe_load_debug_directory Got a page fault while loading symbols

So the loading of the big pdb file is protected by
an exception handler in pe_load_debug_directory.

But afterwards dbghelp.dll tries to work with this partially loaded debug
information and gets a second SIGSEGV, this time unhandled
and unfortunately without any message.