New subject: [Bug 57498] ASan expects some imports to intercept from api-ms-win-core-heap-l1-1-0.dll

4 Dec 2024


      https://bugs.winehq.org/show_bug.cgi?id=57498
Bug ID: 57498
           Summary: ASan expects some imports to intercept from
                    api-ms-win-core-heap-l1-1-0.dll
           Product: Wine
           Version: 9.22
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ucrtbase
          Assignee: wine-bugs@winehq.org
          Reporter: bernhardu@mailbox.org
      Distribution: ---
This is a followup to bug #50993 and bug #49828.
Starting an instrumented executable with ASAN_OPTIONS='verbosity=1'
gives this output:
Failed to intercept ucrtbase.dll import HeapAlloc
  Failed to intercept ucrtbase.dll import HeapFree
  Failed to intercept ucrtbase.dll import HeapReAlloc
  Failed to intercept ucrtbase.dll import HeapSize
This seems to be caused by ASan expecting these imports to be linked in
through api-ms-win-core-heap-l1-1-0.dll.
But currently ucrtbase.dll in Wine links directly to kernel32.dll.
One workaround is to add to ASAN_OPTIONS windows_hook_rtl_allocators=1.
Another workaround is, if already building llvm-mingw from source, to modify
following location this way:
llvm-mingw/llvm-project/compiler-rt/lib/asan/asan_malloc_win.cpp:
 #define INTERCEPT_UCRT_FUNCTION(func)                                  \
   if (!INTERCEPT_FUNCTION_DLLIMPORT(                                   \
-          "ucrtbase.dll", "api-ms-win-core-heap-l1-1-0.dll", func)) {  \
+          "ucrtbase.dll", "kernel32.dll", func)) {  \
Reproducing currently needs a modified llvm-mingw build, which allows
ASan to recognize a few more instructions like here:
  https://github.com/llvm/llvm-project/pull/113085
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[Bug 57498] New: ASan expects some imports to intercept from api-ms-win-core-heap-l1-1-0.dll