[lldb][lit] Add MallocNanoZone envvar to Darwin ASan builds

[chelcassanova]

When builds on Darwin are configured with ASan, running tests will emit a warning about malloc's nano zone that can interfere with the test output and cause failures. Setting the environment variable MallocNanoZone to 0 will remove this warning and allow the tests to run as normal.

[llvmbot]

@llvm/pr-subscribers-lldb

Author: Chelsea Cassanova (chelcassanova)

Changes

When builds on Darwin are configured with ASan, running tests will emit a warning about malloc's nano zone that can interfere with the test output and cause failures. Setting the environment variable MallocNanoZone to 0 will remove this warning and allow the tests to run as normal.

---

Full diff: https://github.com/llvm/llvm-project/pull/88431.diff

2 Files Affected:

• (modified) lldb/test/API/lit.cfg.py (+1)
• (modified) lldb/test/Shell/lit.cfg.py (+2)

diff --git a/lldb/test/API/lit.cfg.py b/lldb/test/API/lit.cfg.py
index f9497b632fc504..9ea389c639a013 100644
--- a/lldb/test/API/lit.cfg.py
+++ b/lldb/test/API/lit.cfg.py
@@ -121,6 +121,7 @@ def delete_module_cache(path):
             config.environment["DYLD_INSERT_LIBRARIES"] = find_sanitizer_runtime(
                 "libclang_rt.asan_osx_dynamic.dylib"
             )
+            config.environment["MallocNanoZone"] = "0"
 
     if "Thread" in config.llvm_use_sanitizer:
         config.environment["TSAN_OPTIONS"] = "halt_on_error=1"
diff --git a/lldb/test/Shell/lit.cfg.py b/lldb/test/Shell/lit.cfg.py
index 31afe5151c0661..345627835d2bf2 100644
--- a/lldb/test/Shell/lit.cfg.py
+++ b/lldb/test/Shell/lit.cfg.py
@@ -52,6 +52,8 @@
 # Enable sanitizer runtime flags.
 config.environment["ASAN_OPTIONS"] = "detect_stack_use_after_return=1"
 config.environment["TSAN_OPTIONS"] = "halt_on_error=1"
+if "Darwin" in config.host_os:
+    config.environment["MallocNanoZone"] = "0"
 
 # Support running the test suite under the lldb-repro wrapper. This makes it
 # possible to capture a test suite run and then rerun all the test from the

[medismailben]

LGTM! It would be nice to may be put a link to a bot that shows those warnings

[JDevlieghere]

LGTM! It would be nice to may be put a link to a bot that shows those warnings

Those logs get recycled pretty quickly so that would only be valuable for a handful of days.

[chelcassanova]

If that's the case then I'll just merge this in with a note on what the error says exactly.