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Herald added subscribers: teemperor, mgorny.
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================
Comment at: lldb/packages/Python/lldbsuite/test/make/Makefile.rules:316
 
-# Use a shared module cache when building in the default test build directory.
-CLANG_MODULE_CACHE_DIR := $(shell echo "$(BUILDDIR)" | sed 
$(QUOTE)s/lldb-test-build.noindex.*/lldb-test-build.noindex\/module-cache-clang/$(QUOTE))
----------------
We should have a fallback here that defaults to `$(BUILDDIR)/module-cache` if 
the variable is not set in the environment.


Before the test reorganization, everything was part of a single test suite with 
a single module cache. Now that things are properly separated this is no longer 
the case. Only the shell tests inherited the logic to properly configure and 
wipe the module caches. This patch adds that logic back for the API tests. 
While doing so, I noticed that we were configuring a Clang module cache in 
CMake, but weren't actually using it from dotest.py. I included a fix for that 
in this patch as well.


Repository:
  rLLDB LLDB

https://reviews.llvm.org/D68755

Files:
  lldb/packages/Python/lldbsuite/test/configuration.py
  lldb/packages/Python/lldbsuite/test/dotest.py
  lldb/packages/Python/lldbsuite/test/dotest_args.py
  lldb/packages/Python/lldbsuite/test/lldbtest.py
  lldb/packages/Python/lldbsuite/test/make/Makefile.rules
  lldb/test/API/lit.cfg
  lldb/test/API/lit.site.cfg.in
  lldb/test/CMakeLists.txt
  lldb/test/Shell/lit.cfg.py
  lldb/test/Shell/lit.site.cfg.py.in

Index: lldb/test/Shell/lit.site.cfg.py.in
===================================================================
--- lldb/test/Shell/lit.site.cfg.py.in
+++ lldb/test/Shell/lit.site.cfg.py.in
@@ -20,8 +20,9 @@
 config.lldb_bitness = 64 if @LLDB_IS_64_BITS@ else 32
 config.lldb_disable_python = @LLDB_DISABLE_PYTHON@
 config.lldb_build_directory = "@LLDB_TEST_BUILD_DIRECTORY@"
-config.lldb_module_cache = "@LLDB_TEST_MODULE_CACHE_LLDB@"
-config.clang_module_cache = "@LLDB_TEST_MODULE_CACHE_CLANG@"
+# The shell tests use their own module caches.
+config.lldb_module_cache = os.path.join("@LLDB_TEST_MODULE_CACHE_LLDB@", "lldb-shell")
+config.clang_module_cache = os.path.join("@LLDB_TEST_MODULE_CACHE_CLANG@", "lldb-shell")
 
 # Support substitution of the tools and libs dirs with user parameters. This is
 # used when we can't determine the tool dir at configuration time.
@@ -32,7 +33,6 @@
     config.lldb_libs_dir = config.lldb_libs_dir % lit_config.params
     config.lldb_tools_dir = config.lldb_tools_dir % lit_config.params
     config.lldb_lit_tools_dir = config.lldb_lit_tools_dir % lit_config.params
-
 except KeyError as e:
     key, = e.args
     lit_config.fatal("unable to find %r parameter, use '--param=%s=VALUE'" % (key,key))
Index: lldb/test/Shell/lit.cfg.py
===================================================================
--- lldb/test/Shell/lit.cfg.py
+++ lldb/test/Shell/lit.cfg.py
@@ -69,9 +69,9 @@
 # incremental build whenever clang changes underneath, so doing it once per
 # lit.py invocation is close enough.
 for cachedir in [config.clang_module_cache, config.lldb_module_cache]:
-    if os.path.isdir(cachedir):
-        print("Deleting module cache at %s."%cachedir)
-        shutil.rmtree(cachedir)
+  if os.path.isdir(cachedir):
+     print("Deleting module cache at %s."%cachedir)
+     shutil.rmtree(cachedir)
 
 # Set a default per-test timeout of 10 minutes. Setting a timeout per test
 # requires that killProcessAndChildren() is supported on the platform and
Index: lldb/test/CMakeLists.txt
===================================================================
--- lldb/test/CMakeLists.txt
+++ lldb/test/CMakeLists.txt
@@ -3,6 +3,12 @@
 
 add_subdirectory(API)
 
+# Configure and create module cache directories.
+set(LLDB_TEST_MODULE_CACHE_LLDB "${LLDB_TEST_BUILD_DIRECTORY}/module-cache-lldb" CACHE PATH "The Clang module cache used by the Clang embedded in LLDB while running tests.")
+set(LLDB_TEST_MODULE_CACHE_CLANG "${LLDB_TEST_BUILD_DIRECTORY}/module-cache-clang" CACHE PATH "The Clang module cache used by the Clang while building tests.")
+file(MAKE_DIRECTORY ${LLDB_TEST_MODULE_CACHE_LLDB})
+file(MAKE_DIRECTORY ${LLDB_TEST_MODULE_CACHE_CLANG})
+
 # LLVM_BUILD_MODE is used in lit.site.cfg
 if (CMAKE_CFG_INTDIR STREQUAL ".")
   set(LLVM_BUILD_MODE ".")
@@ -17,8 +23,6 @@
 get_property(LLDB_DOTEST_ARGS GLOBAL PROPERTY LLDB_DOTEST_ARGS_PROPERTY)
 set(dotest_args_replacement ${LLVM_BUILD_MODE})
 
-set(LLDB_TEST_MODULE_CACHE_LLDB "${LLDB_TEST_BUILD_DIRECTORY}/module-cache-lldb" CACHE PATH "The Clang module cache used by the Clang embedded in LLDB while running tests.")
-set(LLDB_TEST_MODULE_CACHE_CLANG "${LLDB_TEST_BUILD_DIRECTORY}/module-cache-clang" CACHE PATH "The Clang module cache used by the Clang while building tests.")
 
 if(LLDB_BUILT_STANDALONE)
   # In paths to our build-tree, replace CMAKE_CFG_INTDIR with our configuration name placeholder.
Index: lldb/test/API/lit.site.cfg.in
===================================================================
--- lldb/test/API/lit.site.cfg.in
+++ lldb/test/API/lit.site.cfg.in
@@ -17,13 +17,14 @@
 config.llvm_use_sanitizer = "@LLVM_USE_SANITIZER@"
 config.target_triple = "@TARGET_TRIPLE@"
 config.lldb_build_directory = "@LLDB_TEST_BUILD_DIRECTORY@"
-config.lldb_module_cache = "@LLDB_TEST_MODULE_CACHE_LLDB@"
-config.clang_module_cache = "@LLDB_TEST_MODULE_CACHE_CLANG@"
 config.python_executable = "@PYTHON_EXECUTABLE@"
 config.dotest_path = "@LLDB_SOURCE_DIR@/test/API/dotest.py"
 config.dotest_args_str = "@LLDB_DOTEST_ARGS@"
 config.lldb_disable_python = @LLDB_DISABLE_PYTHON@
 config.dotest_lit_args_str = None
+# The API tests use their own module caches.
+config.lldb_module_cache = os.path.join("@LLDB_TEST_MODULE_CACHE_LLDB@", "lldb-api")
+config.clang_module_cache = os.path.join("@LLDB_TEST_MODULE_CACHE_CLANG@", "lldb-api")
 
 # Additional dotest arguments can be passed to lit by providing a
 # semicolon-separates list: --param dotest-args="arg;arg".
Index: lldb/test/API/lit.cfg
===================================================================
--- lldb/test/API/lit.cfg
+++ lldb/test/API/lit.cfg
@@ -5,6 +5,7 @@
 import os
 import platform
 import shlex
+import shutil
 
 import lit.formats
 
@@ -52,6 +53,14 @@
     lit_config.warning("unable to inject shared library path on '{}'".format(
         platform.system()))
 
+# Clean the module caches in the test build directory. This is necessary in an
+# incremental build whenever clang changes underneath, so doing it once per
+# lit.py invocation is close enough.
+for cachedir in [config.clang_module_cache, config.lldb_module_cache]:
+  if os.path.isdir(cachedir):
+    print("Deleting module cache at %s."%cachedir)
+    shutil.rmtree(cachedir)
+
 # Build dotest command.
 dotest_cmd = [config.dotest_path]
 dotest_cmd.extend(config.dotest_args_str.split(';'))
@@ -70,7 +79,10 @@
   dotest_cmd += ['--build-dir', config.lldb_build_directory]
 
 if config.lldb_module_cache:
-  dotest_cmd += ['--module-cache-dir', config.lldb_module_cache]
+  dotest_cmd += ['--lldb-module-cache-dir', config.lldb_module_cache]
+
+if config.clang_module_cache:
+  dotest_cmd += ['--clang-module-cache-dir', config.clang_module_cache]
 
 # Load LLDB test format.
 sys.path.append(os.path.join(config.lldb_src_root, "test", "API"))
Index: lldb/packages/Python/lldbsuite/test/make/Makefile.rules
===================================================================
--- lldb/packages/Python/lldbsuite/test/make/Makefile.rules
+++ lldb/packages/Python/lldbsuite/test/make/Makefile.rules
@@ -313,14 +313,6 @@
 	CFLAGS += -gsplit-dwarf
 endif
 
-# Use a shared module cache when building in the default test build directory.
-CLANG_MODULE_CACHE_DIR := $(shell echo "$(BUILDDIR)" | sed $(QUOTE)s/lldb-test-build.noindex.*/lldb-test-build.noindex\/module-cache-clang/$(QUOTE))
-
-ifeq "$(findstring lldb-test-build.noindex, $(BUILDDIR))" ""
-CLANG_MODULE_CACHE_DIR := $(BUILDDIR)/module-cache
-$(warning failed to set the shared clang module cache dir)
-endif
-
 MODULE_BASE_FLAGS := -fmodules -gmodules -fmodules-cache-path=$(CLANG_MODULE_CACHE_DIR)
 MANDATORY_MODULE_BUILD_CFLAGS := $(MODULE_BASE_FLAGS) -gmodules
 # Build flags for building with C++ modules.
Index: lldb/packages/Python/lldbsuite/test/lldbtest.py
===================================================================
--- lldb/packages/Python/lldbsuite/test/lldbtest.py
+++ lldb/packages/Python/lldbsuite/test/lldbtest.py
@@ -696,7 +696,7 @@
             "settings set plugin.process.gdb-remote.packet-timeout 60",
 
             'settings set symbols.clang-modules-cache-path "{}"'.format(
-                configuration.module_cache_dir),
+                configuration.lldb_module_cache_dir),
             "settings set use-color false",
         ]
         # Make sure that a sanitizer LLDB's environment doesn't get passed on.
Index: lldb/packages/Python/lldbsuite/test/dotest_args.py
===================================================================
--- lldb/packages/Python/lldbsuite/test/dotest_args.py
+++ lldb/packages/Python/lldbsuite/test/dotest_args.py
@@ -150,10 +150,15 @@
         default='lldb-test-build.noindex',
         help='The root build directory for the tests. It will be removed before running.')
     group.add_argument(
-        '--module-cache-dir',
-        dest='module_cache_dir',
+        '--lldb-module-cache-dir',
+        dest='lldb_module_cache_dir',
         metavar='The clang module cache directory used by LLDB',
-        help='The clang module cache directory used by LLDB. This is not the one used by the makefiles. Defaults to <test build directory>/module-cache-lldb.')
+        help='The clang module cache directory used by LLDB. Defaults to <test build directory>/module-cache-lldb.')
+    group.add_argument(
+        '--clang-module-cache-dir',
+        dest='clang_module_cache_dir',
+        metavar='The clang module cache directory used by Clang',
+        help='The clang module cache directory used in the Make files by Clang while building tests. Defaults to <test build directory>/module-cache-clang.')
 
     # Configuration options
     group = parser.add_argument_group('Remote platform options')
Index: lldb/packages/Python/lldbsuite/test/dotest.py
===================================================================
--- lldb/packages/Python/lldbsuite/test/dotest.py
+++ lldb/packages/Python/lldbsuite/test/dotest.py
@@ -426,11 +426,18 @@
         configuration.lldb_platform_working_dir = args.lldb_platform_working_dir
     if args.test_build_dir:
         configuration.test_build_dir = args.test_build_dir
-    if args.module_cache_dir:
-        configuration.module_cache_dir = args.module_cache_dir
+    if args.lldb_module_cache_dir:
+        configuration.lldb_module_cache_dir = args.lldb_module_cache_dir
     else:
-        configuration.module_cache_dir = os.path.join(configuration.test_build_dir,
-                                                      'module-cache-lldb')
+        configuration.lldb_module_cache_dir = os.path.join(
+            configuration.test_build_dir, 'module-cache-lldb')
+    if args.clang_module_cache_dir:
+        configuration.clang_module_cache_dir = args.clang_module_cache_dir
+    else:
+        configuration.clang_module_cache_dir = os.path.join(
+            configuration.test_build_dir, 'module-cache-clang')
+
+    os.environ['CLANG_MODULE_CACHE_DIR'] = configuration.clang_module_cache_dir
 
     # Gather all the dirs passed on the command line.
     if len(args.args) > 0:
Index: lldb/packages/Python/lldbsuite/test/configuration.py
===================================================================
--- lldb/packages/Python/lldbsuite/test/configuration.py
+++ lldb/packages/Python/lldbsuite/test/configuration.py
@@ -107,7 +107,9 @@
 test_build_dir = None
 
 # The clang module cache directory used by lldb.
-module_cache_dir = None
+lldb_module_cache_dir = None
+# The clang module cache directory used by clang.
+clang_module_cache_dir = None
 
 # The only directory to scan for tests. If multiple test directories are
 # specified, and an exclusive test subdirectory is specified, the latter option
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