[all-commits] [llvm/llvm-project] 061426: [sanitizer] Fix vfork interception on loongarch64

[Xi Ruoyao via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 061426df572552bc839e1a80cb29070d4242a32f
      https://github.com/llvm/llvm-project/commit/061426df572552bc839e1a80cb29070d4242a32f
  Author: Xi Ruoyao <xry111 at mengyan1223.wang>
  Date:   2022-11-03 (Thu, 03 Nov 2022)

  Changed paths:
    M compiler-rt/lib/asan/asan_interceptors.h
    M compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_vfork_loongarch64.inc.S
    M compiler-rt/test/asan/TestCases/Linux/vfork.cpp

  Log Message:
  -----------
  [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