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Select the clang-cl-asan CMake preset (RelWithDebInfo, clang-cl, ADDRESS_SANITIZER=ON) to instrument first-party code with AddressSanitizer. The wiring lives in cmake/AddressSanitizer.cmake; SANITIZERS.md tells how to add the clang-cl tools, build, and read the report. Details: - Add the clang-cl-asan preset so the asan build is one selection in Visual Studio, and a base for a CMakeUserPresets.json to inherit. - Instrument first-party code only; the vendored libraries keep default flags. - Use the release CRT and disable MSVC-STL container annotations, so instrumented and un-instrumented TUs stay compatible. - Pass /bigobj to the TUs asan inflates past the COFF section cap. - Link the asan runtime for clang-cl (lld-link does not infer it). - Stub Bink into the exe: retail binkw32.dll cannot load in an asan process (its image base is the 32-bit shadow), so compile no-op exports instead. - Route the asan report to gamedir/asan.report.<pid>, since every app is a WIN32 GUI app with no console to receive the default stderr report. - Opt functions with 32-bit inline __asm out of instrumentation with cmake/asan-ignorelist.txt, one function at a time (asan reserves a register the asm needs). The rest of each translation unit stays instrumented. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>