Add profcheck init script (llvm#561)

This is to be run on VM startup to setup the machine and start the
buildbot.

Author: boomanaiden154

buildbot/google/scripts/profcheck.sh

@@ -0,0 +1,48 @@
+set -ex
+
+apt-get update
+apt-get install -y python3 python3-pip cmake ninja-build git ccache lsb-release wget software-properties-common gnupg wget
+pip3 install --break-system-packages buildbot-worker==3.11.7
+
+bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)" 20
+ln -sf /usr/bin/clang-20 /usr/bin/cc
+ln -sf /usr/bin/clang++-20 /usr/bin/c++
+ln -sf /usr/bin/ld.lld-20 /usr/bin/ld
+
+rm -rf /b
+BOT_DIR=/b
+SERVER_PORT=9994
+WORKER_NAME="$(hostname)"
+WORKER_PASSWORD="$(gsutil cat gs://sanitizer-buildbot/$(hostname)-password)"
+
+userdel buildbot | true
+groupadd -f buildbot
+useradd buildbot -g buildbot -m -d /b/home
+chown buildbot:buildbot $BOT_DIR
+
+sudo -u buildbot buildbot-worker create-worker -f --allow-shutdown=signal $BOT_DIR lab.llvm.org:$SERVER_PORT \
+   "${WORKER_NAME}" "${WORKER_PASSWORD}"
+
+{
+  echo "Mircea Trofin <[email protected]>"
+  echo "Aiden Grossman <[email protected]>"
+} > $BOT_DIR/info/admin
+
+{
+  echo "To reproduce locally, use a standard CMake invocation with -DLLVM_ENABLE_PROFCHECK=ON and -DLLVM_LIT_ARGS='--exclude-xfail'"
+  echo "Example:"
+  echo "cmake -GNinja"
+  echo "  -DCMAKE_BUILD_TYPE=Release"
+  echo "  -DLLVM_ENABLE_ASSERTIONS=ON"
+  echo "  -DLLVM_LIT_ARGS='--exclude-xfail'"
+  echo "  -DLLVM_ENABLE_PROFCHECK=ON"
+  echo
+  uname -a | head -n1
+  date
+  cmake --version | head -n1
+  c++ --version | head -n1
+  ld --version | head -n1
+  lscpu
+} > $BOT_DIR/info/host
+
+sudo -u buildbot buildbot-worker start $BOT_DIR

premerge/main.tf

@@ -171,9 +171,9 @@ module "premerge_cluster_us_central_resources" {
   linux_object_cache_gcp_service_account_email             = module.premerge_cluster_us_central.linux_object_cache_gcp_service_account_email
   windows_2022_object_cache_gcp_service_account_email      = module.premerge_cluster_us_central.windows_2022_object_cache_gcp_service_account_email
   github_arc_version                                       = "0.12.1"
-  linux_buildbot_name                                      = "premerge-us-central-linux"
+  linux_buildbot_name                                      = "premerge-us-central-linux-b1"
   linux_buildbot_password                                  = data.google_secret_manager_secret_version.us_central_linux_buildbot_password.secret_data
-  windows_buildbot_name                                    = "premerge-us-central-windows"
+  windows_buildbot_name                                    = "premerge-us-central-windows-b1"
   windows_buildbot_password                                = data.google_secret_manager_secret_version.us_central_windows_buildbot_password.secret_data
   linux_object_cache_buildbot_service_account_email        = module.premerge_cluster_us_central.linux_object_cache_buildbot_service_account_email
   windows_2022_object_cache_buildbot_service_account_email = module.premerge_cluster_us_central.windows_2022_object_cache_buildbot_service_account_email
@@ -198,9 +198,9 @@ module "premerge_cluster_us_west_resources" {
   linux_object_cache_gcp_service_account_email             = module.premerge_cluster_us_west.linux_object_cache_gcp_service_account_email
   windows_2022_object_cache_gcp_service_account_email      = module.premerge_cluster_us_west.windows_2022_object_cache_gcp_service_account_email
   github_arc_version                                       = "0.12.1"
-  linux_buildbot_name                                      = "premerge-us-west-linux"
+  linux_buildbot_name                                      = "premerge-us-west-linux-b1"
   linux_buildbot_password                                  = data.google_secret_manager_secret_version.us_west_linux_buildbot_password.secret_data
-  windows_buildbot_name                                    = "premerge-us-west-windows"
+  windows_buildbot_name                                    = "premerge-us-west-windows-b1"
   windows_buildbot_password                                = data.google_secret_manager_secret_version.us_west_windows_buildbot_password.secret_data
   linux_object_cache_buildbot_service_account_email        = module.premerge_cluster_us_west.linux_object_cache_buildbot_service_account_email
   windows_2022_object_cache_buildbot_service_account_email = module.premerge_cluster_us_west.windows_2022_object_cache_buildbot_service_account_email