[tools] Disable tools/test under user-mode emulation

Author: iamlouk

tools/test/CMakeLists.txt

@@ -13,15 +13,20 @@ add_dependencies(ret0 not)
 llvm_test_run(EXECUTABLE "$<TARGET_FILE:not>" "$<TARGET_FILE:not>" "$<TARGET_FILE:ret0>")
 llvm_add_test_for_target(ret0)
 
-# Check that expected crashes are handled correctly.
-llvm_test_executable_no_test(abrt abort.c)
-add_dependencies(abrt not)
-llvm_test_run(EXECUTABLE "$<TARGET_FILE:not>" "--crash" "$<TARGET_FILE:abrt>")
-llvm_add_test_for_target(abrt)
+# These test will always fail under user-mode emulation because 'not'
+# spawns a subprocess outside the emulator and the check_env test
+# runs the host python interpreter under the emulator for the target.
+if(NOT(TEST_SUITE_USER_MODE_EMULATION AND TEST_SUITE_RUN_UNDER))
+  # Check that expected crashes are handled correctly.
+  llvm_test_executable_no_test(abrt abort.c)
+  add_dependencies(abrt not)
+  llvm_test_run(EXECUTABLE "$<TARGET_FILE:not>" "--crash" "$<TARGET_FILE:abrt>")
+  llvm_add_test_for_target(abrt)
 
-# Check that not passes environment variables to the called executable.
-find_package(Python COMPONENTS Interpreter)
-llvm_test_executable_no_test(check_env check_env.c)
-add_dependencies(check_env not)
-llvm_test_run(EXECUTABLE ${Python_EXECUTABLE} "%b/test/test_not.py" "$<TARGET_FILE:not>" "$<TARGET_FILE:check_env>")
-llvm_add_test_For_target(check_env)
+  # Check that not passes environment variables to the called executable.
+  find_package(Python COMPONENTS Interpreter)
+  llvm_test_executable_no_test(check_env check_env.c)
+  add_dependencies(check_env not)
+  llvm_test_run(EXECUTABLE ${Python_EXECUTABLE} "%b/test/test_not.py" "$<TARGET_FILE:not>" "$<TARGET_FILE:check_env>")
+  llvm_add_test_For_target(check_env)
+endif()