[all-commits] [llvm/llvm-project] 4e858e: Merging r372038:

[Jian Cai via All-commits]

  Branch: refs/heads/release/9.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 4e858e4ac00b59f064da4e1f7e276916e7d296aa
      https://github.com/llvm/llvm-project/commit/4e858e4ac00b59f064da4e1f7e276916e7d296aa
  Author: Jian Cai <caij2003 at gmail.com>
  Date:   2019-11-08 (Fri, 08 Nov 2019)

  Changed paths:
    M compiler-rt/lib/crt/CMakeLists.txt

  Log Message:
  -----------
  Merging r372038:

------------------------------------------------------------------------
r372038 | jcai19 | 2019-09-16 14:47:47 -0700 (Mon, 16 Sep 2019) | 15 lines

[compiler-rt][crt]  make test case nontrivial in check_cxx_section_exists

Summary:
.init_array gets optimized away when building with -O2 and as a result,
check_cxx_section_exists failed to pass -DCOMPILER_RT_HAS_INITFINI_ARRAY
when building crtbegin.o and crtend.o, which causes binaries linked with
them encounter segmentation fault. See https://crbug.com/855759 for
details. This change prevents .init_array section to be optimized away
even with -O2 or higher optimization level.

Subscribers: dberris, mgorny, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D67628
------------------------------------------------------------------------