build/build-clang/fuzzing_ccov_build_clang_12.patch

   1 From 98bf90ef5ea3dd848ce7d81a662eb7499d11c91c Mon Sep 17 00:00:00 2001
   2 From: Calixte Denizet <calixte.denizet@gmail.com>
   3 Date: Fri, 16 Apr 2021 10:05:34 +0200
   4 Subject: [PATCH] [Gcov] Don't run global destructor in ccov builds when env
   5  MOZ_FUZZING_CCOV is existing
   6
   7 ---
   8  compiler-rt/lib/profile/GCDAProfiling.c | 3 +++
   9  1 file changed, 3 insertions(+)
  10
  11 diff --git a/compiler-rt/lib/profile/GCDAProfiling.c b/compiler-rt/lib/profile/GCDAProfiling.c
  12 index 4293e8f7b5bf..6cda4bc7601f 100644
  13 --- a/compiler-rt/lib/profile/GCDAProfiling.c
  14 +++ b/compiler-rt/lib/profile/GCDAProfiling.c
  15 @@ -586,6 +586,9 @@ void llvm_writeout_files(void) {
  16  __attribute__((destructor(100)))
  17  #endif
  18  static void llvm_writeout_and_clear(void) {
  19 +  if (getenv("MOZ_FUZZING_CCOV")) {
  20 +    return;
  21 +  }
  22    llvm_writeout_files();
  23    fn_list_remove(&writeout_fn_list);
  24  }
  25 --
  26 2.30.2
  27