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[src/trunk]: src/external/gpl3/gcc/dist/libsanitizer/sanitizer_common Use sys...
details: https://anonhg.NetBSD.org/src/rev/84591a5cf5c1
branches: trunk
changeset: 976005:84591a5cf5c1
user: kamil <kamil%NetBSD.org@localhost>
date: Fri Sep 11 01:07:53 2020 +0000
description:
Use sysctl to implement GetPageSize()
Cherry-pick code chunk from newer LLVM compiler-rt.
diffstat:
external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_linux.cc | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diffs (18 lines):
diff -r 6d8c72338640 -r 84591a5cf5c1 external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_linux.cc
--- a/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_linux.cc Fri Sep 11 01:07:27 2020 +0000
+++ b/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_linux.cc Fri Sep 11 01:07:53 2020 +0000
@@ -1139,6 +1139,14 @@
// Android post-M sysconf(_SC_PAGESIZE) crashes if called from .preinit_array.
#if SANITIZER_ANDROID
return 4096;
+#elif SANITIZER_FREEBSD || SANITIZER_NETBSD
+// Use sysctl as sysconf can trigger interceptors internally.
+ int pz = 0;
+ uptr pzl = sizeof(pz);
+ int mib[2] = {CTL_HW, HW_PAGESIZE};
+ int rv = internal_sysctl(mib, 2, &pz, &pzl, nullptr, 0);
+ CHECK_EQ(rv, 0);
+ return (uptr)pz;
#elif SANITIZER_LINUX && (defined(__x86_64__) || defined(__i386__))
return EXEC_PAGESIZE;
#elif SANITIZER_USE_GETAUXVAL
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