Add gtest unit tests to the CMake build.

[zturner]

Summary

After this patch, ninja will automatically build the LLDB unit tests. More work needs to be done to get the unit tests to run automatically as part of "ninja check-lldb", but the plan is to do that in a followup patch.

[zturner]

Added missing LLVM header in gtest_common.h

[tberghammer]

gtest/CMakeLists.txt

13–19

AFAIK the unit tests don't have to be linked together with liblldb. They contain some mock implementation for all dependency from liblldb so I wouldn't be surprised on some linker error because of duplicate definition.

CMakeLists.txt

 add_subdirectory(source)
 add_subdirectory(test)
 add_subdirectory(tools)
+add_subdirectory(gtest)
 
 
 if ( LLDB_ENABLE_PYTHON_SCRIPTS_SWIG_API_GENERATION AND NOT LLDB_DISABLE_PYTHON )

cmake/modules/LLDBConfig.cmake

   "Enables using new Python scripts for SWIG API generation .")  
 
 set(LLDB_SOURCE_ROOT "${CMAKE_CURRENT_SOURCE_DIR}/source")
-set(LLDB_INCLUDE_ROOT "${LLDB_INCLUDE_ROOT}/include")
+set(LLDB_INCLUDE_ROOT "${CMAKE_CURRENT_SOURCE_DIR}/include")
 
 set(LLDB_DISABLE_PYTHON 0 CACHE BOOL "Disables the Python scripting integration.")
 

gtest/CMakeLists.txt

+add_custom_target(LLDBUnitTests)
+set_target_properties(LLDBUnitTests PROPERTIES FOLDER "LLDB tests")
+
+include_directories(${LLDB_SOURCE_ROOT})
+
+set(LLDB_GTEST_COMMON_INCLUDE ${CMAKE_CURRENT_SOURCE_DIR}/include/gtest_common.h)
+if (MSVC)
+  list(APPEND LLVM_COMPILE_FLAGS /FI ${LLDB_GTEST_COMMON_INCLUDE})
+else ()
+  list(APPEND LLVM_COMPILE_FLAGS -include ${LLDB_GTEST_COMMON_INCLUDE})
+endif ()
+
+# add_lldb_unittest(test_dirname file1.cpp file2.cpp)
+#
+# Will compile the list of files together and link against the liblldb
+function(add_lldb_unittest test_name)
+  add_unittest(LLDBUnitTests ${test_name} ${ARGN})
+  target_link_libraries(${test_name} liblldb)
+endfunction()
+
+add_subdirectory(unittest)

gtest/include/gtest_common.h

+//===-- gtest_common.h ------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#if defined(LLDB_GTEST_COMMON_H)
+#error "gtest_common.h should not be included manually."
+#else
+#define LLDB_GTEST_COMMON_H
+#endif
+
+// This header file is force included by all of LLDB's unittest compilation
+// units.  Be very leary about putting anything in this file.
+
+#if defined(_MSC_VER) && (_HAS_EXCEPTIONS == 0)
+// MSVC's STL implementation tries to work well with /EHs-c- and
+// _HAS_EXCEPTIONS=0.  But <thread> in particular doesn't work with it, because
+// it relies on <concrt.h> which tries to throw an exception without checking
+// for _HAS_EXCEPTIONS=0.  This causes the linker to require a definition of
+// __uncaught_exception(), but the STL doesn't define this function when
+// _HAS_EXCEPTIONS=0.  The workaround here is to just provide a stub
+// implementation to get it to link.
+inline bool
+__uncaught_exception()
+{
+    return true;
+}
+#endif

gtest/unittest/CMakeLists.txt

+add_subdirectory(Host)
+add_subdirectory(Plugins)
+add_subdirectory(Utility)

gtest/unittest/Host/CMakeLists.txt

+add_lldb_unittest(HostTests
+  SocketAddressTest.cpp
+  SocketTest.cpp
+  SocketTestMock.cpp
+  )

gtest/unittest/Plugins/CMakeLists.txt

+add_subdirectory(Process)

gtest/unittest/Plugins/Process/CMakeLists.txt

+if (CMAKE_SYSTEM_NAME MATCHES "Linux")
+  add_subdirectory(Linux)
+endif()

gtest/unittest/Plugins/Process/Linux/CMakeLists.txt

+add_lldb_unittest(ProcessLinuxTests
+  ThreadStateCoordinatorTest.cpp
+  ThreadStatecoordinatorMock.cpp
+  )

gtest/unittest/Utility/CMakeLists.txt

+add_lldb_unittest(UtilityTests
+  StringExtractorTest.cpp
+  UriParserTest.cpp
+  )