[sanitizer] Fix vfork interception on loongarch64
Fix a brown paper bag error made by me in D129418. I didn't set
ASAN_INTERCEPT_VFORK correctly for loongarch64, but created an all-zero
object for __interception::real_vfork. This caused anything calling
vfork() to die instantly.
Fix this issue by setting ASAN_INTERCEPT_VFORK and remove the bad
all-zero definition. Other ports have an all-zero common definition but
we don't need it at least for now.
And, enable ASAN vfork test for loongarch64 to prevent regression in the
future.
Differential Revision: https://reviews.llvm.org/D137160
GitOrigin-RevId: 061426df572552bc839e1a80cb29070d4242a32f
3 files changed
