From 6b500b25174afc3fce0bccc2bef8bdfe9022fd9f Mon Sep 17 00:00:00 2001
From: Ryan Macnak <rmacnak@google.com>
Date: Mon, 1 Dec 2025 15:06:53 -0800
Subject: [PATCH] [build] Put sanitizer versions of the AOT runtime into the
 SDK for testing.

Note there is no need for versions of gen_snapshot because the sanitizer target is a runtime flag.

Change-Id: I25485e27331a0b8724e954a5222a11a1db45cfb7
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/464623
Reviewed-by: Alexander Aprelev <aam@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
---
 build/config/sysroot.gni            |  5 +++-
 build/toolchain/toolchain_suite.gni | 22 +++++++++++++++
 sdk/BUILD.gn                        | 42 +++++++++++++++++++++++++----
 3 files changed, 63 insertions(+), 6 deletions(-)

diff --git a/build/config/sysroot.gni b/build/config/sysroot.gni
index a2e91adcdea..27ea1ea339f 100644
--- a/build/config/sysroot.gni
+++ b/build/config/sysroot.gni
@@ -51,7 +51,10 @@ if (is_linux) {
 
 if ((current_toolchain == host_toolchain ||
      current_toolchain == default_toolchain ||
-     current_toolchain == "${default_toolchain}_shared") &&
+     current_toolchain == "${default_toolchain}_shared" ||
+     current_toolchain == "${default_toolchain}_asan" ||
+     current_toolchain == "${default_toolchain}_msan" ||
+     current_toolchain == "${default_toolchain}_tsan") &&
     target_sysroot != "") {
   sysroot = target_sysroot
 } else if (is_android) {
diff --git a/build/toolchain/toolchain_suite.gni b/build/toolchain/toolchain_suite.gni
index 9c6d0b7b476..e0482930343 100644
--- a/build/toolchain/toolchain_suite.gni
+++ b/build/toolchain/toolchain_suite.gni
@@ -31,6 +31,28 @@ _all_toolchains = [
       is_shared_library = true
     }
   },
+
+  {
+    suffix = "_asan"
+    toolchain_args = {
+      is_shared_library = false
+      is_asan = true
+    }
+  },
+  {
+    suffix = "_msan"
+    toolchain_args = {
+      is_shared_library = false
+      is_msan = true
+    }
+  },
+  {
+    suffix = "_tsan"
+    toolchain_args = {
+      is_shared_library = false
+      is_tsan = true
+    }
+  },
 ]
 
 template("toolchain_suite") {
diff --git a/sdk/BUILD.gn b/sdk/BUILD.gn
index 5dcc0f17c6c..805ab0bd1ad 100644
--- a/sdk/BUILD.gn
+++ b/sdk/BUILD.gn
@@ -374,6 +374,38 @@ copy("copy_dart_aotruntime") {
   ]
 }
 
+copy_sanitizer_deps = []
+if (!using_sanitizer && current_os == "linux") {
+  sanitizers = []
+  if (current_cpu == "x64" || current_cpu == "arm64") {
+    sanitizers += [
+      "asan",
+      "msan",
+      "tsan",
+    ]
+  } else if (current_cpu == "riscv64") {
+    # Fuchsia Clang is missing the riscv64 MSAN runtime.
+    sanitizers += [
+      "asan",
+      "tsan",
+    ]
+  }
+
+  foreach(sanitizer, sanitizers) {
+    copy("copy_dart_aotruntime_$sanitizer") {
+      visibility = [ ":group_dart2native" ]
+      deps = [ "../runtime/bin:dartaotruntime_product(${current_toolchain}_${sanitizer})" ]
+      src_dir = get_label_info(
+              "../runtime/bin:dartaotruntime_product(${current_toolchain}_${sanitizer})",
+              "root_out_dir")
+      sources =
+          [ "$src_dir/${dart_aotruntime_stripped_binary}${executable_suffix}" ]
+      outputs = [ "$root_out_dir/$dart_sdk_output/bin/dartaotruntime_${sanitizer}${executable_suffix}" ]
+    }
+    copy_sanitizer_deps += [ ":copy_dart_aotruntime_$sanitizer" ]
+  }
+}
+
 group("copy_gen_snapshot") {
   visibility = [ ":group_dart2native" ]
   public_deps = [ ":copy_gen_snapshot_exe" ]
@@ -419,11 +451,11 @@ copy("copy_gen_kernel_snapshot") {
 
 group("group_dart2native") {
   deps = [
-    ":copy_dart_aotruntime",
-    ":copy_gen_kernel_snapshot",
-    ":copy_gen_snapshot",
-    ":copy_vm_platform_product",
-  ]
+           ":copy_dart_aotruntime",
+           ":copy_gen_kernel_snapshot",
+           ":copy_gen_snapshot",
+           ":copy_vm_platform_product",
+         ] + copy_sanitizer_deps
 }
 
 # A template for copying the things in _platform_sdk_scripts and