build/build-clang/Remove-FlushViewOfFile-when-unmaping-gcda-files.patch

   1 From 78a6bcfed4b73f13b9973afd69b76067dd4a5dde Mon Sep 17 00:00:00 2001
   2 From: Calixte Denizet <calixte.denizet@gmail.com>
   3 Date: Mon, 4 Oct 2021 11:07:56 +0200
   4 Subject: [PATCH] Remove FlushViewOfFile when unmaping gcda files   - it can
   5  causes bad performances with slow disks;   - MS docs say that it's mainly
   6  useful in case of hard failures (OS crash, electrical failure, ...): so it's
   7  useless to call this function when ccov builds run on CI.
   8
   9 ---
  10  compiler-rt/lib/profile/GCDAProfiling.c | 5 -----
  11  1 file changed, 5 deletions(-)
  12
  13 diff --git a/compiler-rt/lib/profile/GCDAProfiling.c b/compiler-rt/lib/profile/GCDAProfiling.c
  14 index 4293e8f7b5bf..83650d33c95d 100644
  15 --- a/compiler-rt/lib/profile/GCDAProfiling.c
  16 +++ b/compiler-rt/lib/profile/GCDAProfiling.c
  17 @@ -286,11 +286,6 @@ static int map_file() {
  18
  19  static void unmap_file() {
  20  #if defined(_WIN32)
  21 -  if (!FlushViewOfFile(write_buffer, file_size)) {
  22 -    fprintf(stderr, "profiling: %s: cannot flush mapped view: %lu\n", filename,
  23 -            GetLastError());
  24 -  }
  25 -
  26    if (!UnmapViewOfFile(write_buffer)) {
  27      fprintf(stderr, "profiling: %s: cannot unmap mapped view: %lu\n", filename,
  28              GetLastError());
  29 --
  30 2.33.0
  31