[compiler-rt] [compiler-rt] Fixed Android 8.1 `getauxval(AT_PAGESZ)` crashes if called from `.preinit_array`. (#113427) (PR #116121)

[Florian Mayer via llvm-commits]

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@@ -1219,17 +1213,11 @@ uptr GetPageSize() {
   int rv = internal_sysctl(mib, 2, &pz, &pzl, nullptr, 0);
   CHECK_EQ(rv, 0);
   return (uptr)pz;
+#    elif SANITIZER_ANDROID
+  // Using `getpagesize` because calling `getauxval` or `sysconf` from the
+  // `.preinit_array` can cause crashes on some older API levels.
+  return getpagesize();
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fmayer wrote:

I don't think that actually works..  that calls through to `getauxval` via `page_size`: https://cs.android.com/android/platform/superproject/main/+/main:bionic/libc/platform/bionic/page.h;l=26?q=page_size%20f:bionic&sq=&ss=android%2Fplatform%2Fsuperproject%2Fmain

https://github.com/llvm/llvm-project/pull/116121