[lldb][test] Link test binaries with -random_uuid

[kastiglione]

While reviewing #197237, it occurred to me that -random_uuid could be an alternative solution to problem that was solved by adding a ".noindex" suffix to the lldb-test-build directory name.

[llvmorg-github-actions]

@llvm/pr-subscribers-lldb

Author: Dave Lee (kastiglione)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/199385.diff

1 Files Affected:

• (modified) lldb/packages/Python/lldbsuite/test/make/Makefile.rules (+4)

diff --git a/lldb/packages/Python/lldbsuite/test/make/Makefile.rules b/lldb/packages/Python/lldbsuite/test/make/Makefile.rules
index 1ec9b420e3f36..44aa91ef7b6fc 100644
--- a/lldb/packages/Python/lldbsuite/test/make/Makefile.rules
+++ b/lldb/packages/Python/lldbsuite/test/make/Makefile.rules
@@ -209,6 +209,10 @@ ifeq "$(OS)" "Darwin"
 	DSFLAGS := $(DSFLAGS_EXTRAS)
 	DSYM = $(EXE).dSYM
 	ARFLAGS := -static -o
+	# The default UUID is a hash based on filename and __text section content.
+	# Use a random UUID so that LLDB and Spotlight never confuse two test
+	# binaries, where repeated test code can result in identical binaries.
+	LDFLAGS += -Wl,-random_uuid
 else
 	ifeq "$(SPLIT_DEBUG_SYMBOLS)" "YES"
 		DSYM = $(EXE).debug