Re: How to use AddressSanitizer with Wine?

On Sat, Apr 26, 2025 at 4:36 PM Bernhard Übelacker
<[email protected]> wrote:

> For enabling ASan(PE) I collected some "notes to myself", which I hope
> are enough accurate to enable someone else to reproduce the results.

> [6] https://gitlab.winehq.org/bernhardu/wine/-/blob/asan-pe_2025-04-05_wine-10.6/README-ASan.md?ref_type=heads

Thank you for sharing! Goodness, it's a lot more complicated than I
had hoped. Notwithstanding the difficulty, following your instructions
closely I was able to build and run Wine with the llvm-mingw AUR
package.[1] My LLVM variables look like this:

export LLVM_INST_PATH=/opt/llvm-mingw
export x86_64_LLVM_CLANG_RT_LIB=$(find $LLVM_INST_PATH -name
libclang_rt.asan_dynamic-x86_64.dll.a)
export i386_LLVM_CLANG_RT_LIB=$(find $LLVM_INST_PATH -name
libclang_rt.asan_dynamic-i386.dll.a)

For my own sanity, I created scripts named configure64.sh, build64.sh,
configure32.sh, build32.sh, and run.sh for the various steps of the
instructions. I think it would be a lot easier to use your ASan branch
if the commands were already in scripts.

> Unfortunately I have one patch with LLVM still in progress,
> therefore a self-built LLVM would be needed, to build wine.
> But this is just needed for HEAP_REALLOC_IN_PLACE_ONLY re-allocations,
> and running with "windows_hook_rtl_allocators=0" should not be affected by this,
> and that way building wine from the plain nightly llvm-mingw package should work.

Could you note that in the README please? Upstream llvm-mingw combined
with windows_hook_rtl_allocators=1 resulted in the cryptic error
"wine: could not load kernel32.dll, status c0000135" when trying to
initialize and use the Wine prefix.

I ran a few parts of the Wine test suite and I've submitted my first
patch based on the results.[2] Furthermore, since the instructions in
the wiki were outdated and nonfunctional, I've replaced them with a
link to your repository.[3] Thanks very much for all the work you put
into it!

-Alex

[1] https://aur.archlinux.org/packages/llvm-mingw
[2] https://gitlab.winehq.org/wine/wine/-/merge_requests/7925
[3] https://gitlab.winehq.org/wine/wine/-/wikis/Building-Wine#memory--address-checkers