================
@@ -115,6 +121,18 @@ extern int unw_set_reg(unw_cursor_t *, unw_regnum_t,
unw_word_t) LIBUNWIND_AVAIL
extern int unw_set_fpreg(unw_cursor_t *, unw_regnum_t, unw_fpreg_t)
LIBUNWIND_AVAIL;
extern int unw_resume(unw_cursor_t *) LIBUNWIND_AVAIL;
+#ifdef LIBUNWIND_HAVE_MSAN
+// unw_getcontext is implemented in assembly so it is rather difficult to
+// mark the MSan shadow as initialized from within the function. Instead we
+// use a macro wrapper when compiling with MSan to avoid false-positives.
+#define unw_getcontext(context)
\
----------------
ldionne wrote:
I think what I had in mind was something like:
```
extern "C" int __unw_getcontext(unw_context_t *);
inline int unw_getcontext(unw_context_t *ctx) {
// do stuff
return __unw_getcontext(ctx);
}
```
I am having a bit of trouble tracking down how `unw_getcontext` is implemented
right now, but IIUC it's only an alias to `__unw_getcontext`, is that right? If
so, I think the `inline` approach here would work, I think?
https://github.com/llvm/llvm-project/pull/67860
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