From 3578883bb3616208b8f9bb6fa03dc1fda0a16a78 Mon Sep 17 00:00:00 2001
From: Rasmus Munk Larsen <4643818-rmlarsen1@users.noreply.gitlab.com>
Date: Thu, 19 Mar 2026 17:56:43 -0700
Subject: [PATCH] CI: Split ASAN/UBSAN build into official/unsupported jobs

libeigen/eigen!2315

Co-authored-by: Rasmus Munk Larsen <rmlarsen@gmail.com>
---
 ci/build.linux.gitlab-ci.yml | 18 +++++++++++++++++-
 ci/test.linux.gitlab-ci.yml  |  3 ++-
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/ci/build.linux.gitlab-ci.yml b/ci/build.linux.gitlab-ci.yml
index eab079700..fdbb59ab1 100644
--- a/ci/build.linux.gitlab-ci.yml
+++ b/ci/build.linux.gitlab-ci.yml
@@ -127,9 +127,15 @@ build:linux:docs:
 
 ######## Sanitizers ############################################################
 
-build:linux:cross:x86-64:clang-19:default:asan-ubsan:
+# ASAN/UBSAN builds are split into official/unsupported because the
+# instrumented executables are too large to upload as a single artifact.
+.build:linux:cross:x86-64:clang-19:default:asan-ubsan:
   extends: .build:linux:cross:x86-64
   image: ubuntu:24.04
+  # Disable cache for ASAN builds: instrumented .o files are so large that
+  # downloading the cache can take longer than a clean build from scratch.
+  cache: []
+  timeout: 2h
   variables:
     EIGEN_CI_INSTALL: clang-19 libclang-rt-19-dev
     EIGEN_CI_C_COMPILER: clang-19
@@ -139,6 +145,16 @@ build:linux:cross:x86-64:clang-19:default:asan-ubsan:
       -DEIGEN_TEST_CUSTOM_CXX_FLAGS=-fsanitize=address,undefined;-fno-omit-frame-pointer;-fno-sanitize-recover=undefined
       -DEIGEN_TEST_CUSTOM_LINKER_FLAGS=-fsanitize=address,undefined
 
+build:linux:cross:x86-64:clang-19:default:asan-ubsan:official:
+  extends: .build:linux:cross:x86-64:clang-19:default:asan-ubsan
+  variables:
+    EIGEN_CI_BUILD_TARGET: BuildOfficial
+
+build:linux:cross:x86-64:clang-19:default:asan-ubsan:unsupported:
+  extends: .build:linux:cross:x86-64:clang-19:default:asan-ubsan
+  variables:
+    EIGEN_CI_BUILD_TARGET: BuildUnsupported
+
 ######## NVHPC #################################################################
 
 # NVHPC (nvc++) uses NVIDIA's HPC SDK container image with the compilers
diff --git a/ci/test.linux.gitlab-ci.yml b/ci/test.linux.gitlab-ci.yml
index b093cc2b3..3461f978f 100644
--- a/ci/test.linux.gitlab-ci.yml
+++ b/ci/test.linux.gitlab-ci.yml
@@ -225,7 +225,6 @@ test:linux:x86-64:clang-19:generic:avx512dq:unsupported:
 .test:linux:x86-64:clang-19:default:asan-ubsan:
   extends: .test:linux:x86-64
   image: ubuntu:24.04
-  needs: [ build:linux:cross:x86-64:clang-19:default:asan-ubsan ]
   variables:
     EIGEN_CI_INSTALL: clang-19 llvm-19
     ASAN_OPTIONS: detect_leaks=0:print_stacktrace=1
@@ -235,11 +234,13 @@ test:linux:x86-64:clang-19:generic:avx512dq:unsupported:
 
 test:linux:x86-64:clang-19:default:asan-ubsan:official:
   extends: .test:linux:x86-64:clang-19:default:asan-ubsan
+  needs: [ build:linux:cross:x86-64:clang-19:default:asan-ubsan:official ]
   variables:
     EIGEN_CI_CTEST_LABEL: Official
 
 test:linux:x86-64:clang-19:default:asan-ubsan:unsupported:
   extends: .test:linux:x86-64:clang-19:default:asan-ubsan
+  needs: [ build:linux:cross:x86-64:clang-19:default:asan-ubsan:unsupported ]
   variables:
     EIGEN_CI_CTEST_LABEL: Unsupported