[all-commits] [llvm/llvm-project] 4c6e27: [gn] Make ubsan errors fatal, as in cmake

[Reid Kleckner via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4c6e2774d8273ecf8b23f376066249fee5e6f9f6
      https://github.com/llvm/llvm-project/commit/4c6e2774d8273ecf8b23f376066249fee5e6f9f6
  Author: Reid Kleckner <rnk at google.com>
  Date:   2021-05-28 (Fri, 28 May 2021)

  Changed paths:
    M llvm/utils/gn/build/BUILD.gn

  Log Message:
  -----------
  [gn] Make ubsan errors fatal, as in cmake

Apparently ubsan errors are non-fatal by default. If you introduce UB
into LLVM and run the tests, if errors are not fatal, the test will
still produce the expected output and the tests will pass. In order to
make ubsan errors show up as test failures, they have to be made fatal.
Pass the -fno-sanitize-recover=all flag to make it so.

Differential Revision: https://reviews.llvm.org/D103298