beanz created this revision.
Herald added a subscriber: mgorny.

This patch refactors the CMake build system's support for building debugserver 
to allow us to build the majority of debugserver's sources into the 
debugserverCommon library which can then be reused by unit tests.

The first unit test I've written tests debug server's ability to accept 
incoming connections from LLDB. The test forks the process, and one side 
creates a listening socket using debugserver's socket API, the other side 
creates a transmitting socket using LLDB's TCPSocket class.

I have no clue where to even start getting this connected into the LLDB Xcode 
project, so for now these tests are CMake-only.


https://reviews.llvm.org/D31357

Files:
  tools/debugserver/source/CMakeLists.txt
  tools/debugserver/source/MacOSX/CMakeLists.txt
  unittests/CMakeLists.txt
  unittests/debugserver/CMakeLists.txt
  unittests/debugserver/RNBSocketTest.cpp
  unittests/debugserver/debugserver_LogCallback.cpp

Index: unittests/debugserver/debugserver_LogCallback.cpp
===================================================================
--- /dev/null
+++ unittests/debugserver/debugserver_LogCallback.cpp
@@ -0,0 +1,20 @@
+//===-- debugserver_LogCallback.cpp -----------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+//------------------------------------------------------------------------------
+// this function is defined in debugserver.cpp, but is needed to link the
+// debugserver Common library. It is for logging only, so it is left
+// unimplemented here.
+//------------------------------------------------------------------------------
+
+#include <stdint.h>
+#include <stdarg.h>
+
+void FileLogCallback(void *baton, uint32_t flags, const char *format,
+                     va_list args) {}
\ No newline at end of file
Index: unittests/debugserver/RNBSocketTest.cpp
===================================================================
--- /dev/null
+++ unittests/debugserver/RNBSocketTest.cpp
@@ -0,0 +1,35 @@
+//===-- RNBSocketTest.cpp ---------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "gtest/gtest.h"
+
+#include <sys/sysctl.h>
+#include <unistd.h>
+
+#include "RNBSocket.h"
+#include "lldb/Host/Socket.h"
+
+using namespace lldb_private;
+
+static void ServerCallback(const void *baton, in_port_t port) {}
+
+TEST(RNBSocket, LoopBackListenIPv4) {
+  auto ChildPID = fork();
+  if (ChildPID != 0) {
+    RNBSocket ServerSocket;
+    auto result = ServerSocket.Listen("localhost", 4242, ServerCallback, NULL);
+    ASSERT_FALSE(result);
+  } else {
+    Socket *ClientSocket;
+    Error Err = Socket::TcpConnect("localhost:4242", false, ClientSocket);
+    if (Err.Fail())
+      abort();
+    exit(0);
+  }
+}
Index: unittests/debugserver/CMakeLists.txt
===================================================================
--- /dev/null
+++ unittests/debugserver/CMakeLists.txt
@@ -0,0 +1,13 @@
+include_directories(${LLDB_SOURCE_DIR}/tools/debugserver/source
+                    ${LLDB_SOURCE_DIR}/tools/debugserver/source/MacOSX)
+
+add_lldb_unittest(debugserverTests
+  RNBSocketTest.cpp
+  debugserver_LogCallback.cpp
+
+  LINK_LIBS
+    lldbDebugserverCommon
+    lldbHost
+  LINK_COMPONENTS
+    Support
+  )
Index: unittests/CMakeLists.txt
===================================================================
--- unittests/CMakeLists.txt
+++ unittests/CMakeLists.txt
@@ -70,3 +70,7 @@
 add_subdirectory(Target)
 add_subdirectory(UnwindAssembly)
 add_subdirectory(Utility)
+
+if(LLDB_CAN_USE_DEBUGSERVER)
+  add_subdirectory(debugserver)
+endif()
\ No newline at end of file
Index: tools/debugserver/source/MacOSX/CMakeLists.txt
===================================================================
--- tools/debugserver/source/MacOSX/CMakeLists.txt
+++ tools/debugserver/source/MacOSX/CMakeLists.txt
@@ -6,70 +6,3 @@
 add_subdirectory(DarwinLog)
 
 include_directories(..)
-
-set(generated_mach_interfaces
-  ${CMAKE_CURRENT_BINARY_DIR}/mach_exc.h
-  ${CMAKE_CURRENT_BINARY_DIR}/mach_excServer.c
-  ${CMAKE_CURRENT_BINARY_DIR}/mach_excUser.c
-  )
-add_custom_command(OUTPUT ${generated_mach_interfaces}
-  COMMAND mig ${CMAKE_CURRENT_SOURCE_DIR}/dbgnub-mig.defs
-  DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/dbgnub-mig.defs
-  )
-
-set(DEBUGSERVER_VERS_GENERATED_FILE ${CMAKE_CURRENT_BINARY_DIR}/debugserver_vers.c)
-set_source_files_properties(${DEBUGSERVER_VERS_GENERATED_FILE} PROPERTIES GENERATED 1)
-
-add_custom_command(OUTPUT ${DEBUGSERVER_VERS_GENERATED_FILE}
-  COMMAND ${LLDB_SOURCE_DIR}/scripts/generate-vers.pl
-          ${LLDB_SOURCE_DIR}/lldb.xcodeproj/project.pbxproj debugserver
-          > ${DEBUGSERVER_VERS_GENERATED_FILE}
-  DEPENDS ${LLDB_SOURCE_DIR}/scripts/generate-vers.pl
-          ${LLDB_SOURCE_DIR}/lldb.xcodeproj/project.pbxproj
-  )
-
-add_lldb_tool(debugserver INCLUDE_IN_FRAMEWORK
-  CFBundle.cpp
-  CFString.cpp
-  Genealogy.cpp
-  MachException.cpp
-  MachProcess.mm
-  MachTask.mm
-  MachThread.cpp
-  MachThreadList.cpp
-  MachVMMemory.cpp
-  MachVMRegion.cpp
-  OsLogger.cpp
-  ${generated_mach_interfaces}
-  ${DEBUGSERVER_VERS_GENERATED_FILE}
-
-  LINK_LIBS
-    lldbDebugserverCommon
-    lldbDebugserverMacOSX_I386
-    lldbDebugserverMacOSX_X86_64
-    lldbDebugserverMacOSX_DarwinLog
-  )
-
-set_source_files_properties(
-  HasAVX.s
-  # Necessary since compilation will fail with stand-alone assembler
-  PROPERTIES LANGUAGE C COMPILE_FLAGS "-x assembler-with-cpp"
-  )
-
-set(LLDB_CODESIGN_IDENTITY "lldb_codesign"
-  CACHE STRING "Identity used for code signing. Set to empty string to skip the signing step.")
-if (NOT ("${LLDB_CODESIGN_IDENTITY}" STREQUAL ""))
-  execute_process(
-    COMMAND xcrun -f codesign_allocate
-    OUTPUT_STRIP_TRAILING_WHITESPACE
-    OUTPUT_VARIABLE CODESIGN_ALLOCATE
-    )
-  add_custom_command(TARGET debugserver
-    POST_BUILD
-    # Note: --entitlements option removed (see comment above).
-    COMMAND ${CMAKE_COMMAND} -E env CODESIGN_ALLOCATE=${CODESIGN_ALLOCATE}
-            codesign --force --sign ${LLDB_CODESIGN_IDENTITY}
-            $<TARGET_FILE:debugserver>
-    WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/bin
-  )
-endif()
Index: tools/debugserver/source/CMakeLists.txt
===================================================================
--- tools/debugserver/source/CMakeLists.txt
+++ tools/debugserver/source/CMakeLists.txt
@@ -2,12 +2,10 @@
 include_directories(${LLDB_SOURCE_DIR}/source)
 include_directories(MacOSX/DarwinLog)
 
-if (CMAKE_SYSTEM_NAME MATCHES "Darwin")
-  include_directories(MacOSX)
-  #include_directories(${CMAKE_CURRENT_BINARY_DIR}/MacOSX)
+include_directories(MacOSX)
+#include_directories(${CMAKE_CURRENT_BINARY_DIR}/MacOSX)
 
-  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stdlib=libc++ -Wl,-sectcreate,__TEXT,__info_plist,${CMAKE_CURRENT_SOURCE_DIR}/../resources/lldb-debugserver-Info.plist")
-endif()
+set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stdlib=libc++ -Wl,-sectcreate,__TEXT,__info_plist,${CMAKE_CURRENT_SOURCE_DIR}/../resources/lldb-debugserver-Info.plist")
 
 check_cxx_compiler_flag("-Wno-gnu-zero-variadic-macro-arguments"
                         CXX_SUPPORTS_NO_GNU_ZERO_VARIADIC_MACRO_ARGUMENTS)
@@ -27,19 +25,31 @@
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-extended-offsetof")
 endif ()
 
-if (NOT CMAKE_SYSTEM_NAME MATCHES "Darwin")
-  add_definitions(
-    -DDEBUGSERVER_VERSION_STR="${LLDB_VERSION}"
-    )
-endif ()
+find_library(COCOA_LIBRARY Cocoa)
+add_subdirectory(MacOSX)
 
-if (CMAKE_SYSTEM_NAME MATCHES "Darwin")
-  find_library(COCOA_LIBRARY Cocoa)
-  add_subdirectory(MacOSX)
-endif()
+set(generated_mach_interfaces
+  ${CMAKE_CURRENT_BINARY_DIR}/mach_exc.h
+  ${CMAKE_CURRENT_BINARY_DIR}/mach_excServer.c
+  ${CMAKE_CURRENT_BINARY_DIR}/mach_excUser.c
+  )
+add_custom_command(OUTPUT ${generated_mach_interfaces}
+  COMMAND mig ${CMAKE_CURRENT_SOURCE_DIR}/MacOSX/dbgnub-mig.defs
+  DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/MacOSX/dbgnub-mig.defs
+  )
 
-add_lldb_library(lldbDebugserverCommon
-  debugserver.cpp
+set(DEBUGSERVER_VERS_GENERATED_FILE ${CMAKE_CURRENT_BINARY_DIR}/debugserver_vers.c)
+set_source_files_properties(${DEBUGSERVER_VERS_GENERATED_FILE} PROPERTIES GENERATED 1)
+
+add_custom_command(OUTPUT ${DEBUGSERVER_VERS_GENERATED_FILE}
+  COMMAND ${LLDB_SOURCE_DIR}/scripts/generate-vers.pl
+          ${LLDB_SOURCE_DIR}/lldb.xcodeproj/project.pbxproj debugserver
+          > ${DEBUGSERVER_VERS_GENERATED_FILE}
+  DEPENDS ${LLDB_SOURCE_DIR}/scripts/generate-vers.pl
+          ${LLDB_SOURCE_DIR}/lldb.xcodeproj/project.pbxproj
+  )
+
+set(lldbDebugserverCommonSources
   DNBArch.cpp
   DNBBreakpoint.cpp
   DNB.cpp
@@ -63,12 +73,54 @@
   RNBSocket.cpp
   SysSignal.cpp
   TTYState.cpp
+  
+  MacOSX/CFBundle.cpp
+  MacOSX/CFString.cpp
+  MacOSX/Genealogy.cpp
+  MacOSX/MachException.cpp
+  MacOSX/MachProcess.mm
+  MacOSX/MachTask.mm
+  MacOSX/MachThread.cpp
+  MacOSX/MachThreadList.cpp
+  MacOSX/MachVMMemory.cpp
+  MacOSX/MachVMRegion.cpp
+  MacOSX/OsLogger.cpp
+  ${generated_mach_interfaces}
+  ${DEBUGSERVER_VERS_GENERATED_FILE})
+
+add_library(lldbDebugserverCommon ${lldbDebugserverCommonSources})
+
+target_link_libraries(lldbDebugserverCommon
+                      INTERFACE ${COCOA_LIBRARY}
+                      lldbDebugserverMacOSX_I386
+                      lldbDebugserverMacOSX_X86_64
+                      lldbDebugserverMacOSX_DarwinLog)
+
+set(LLVM_OPTIONAL_SOURCES ${lldbDebugserverCommonSources})
+add_lldb_tool(debugserver INCLUDE_IN_FRAMEWORK
+  debugserver.cpp
 
   LINK_LIBS
-    lldbHost
-    ${COCOA_LIBRARY}
+    lldbDebugserverCommon
   )
 
+set(LLDB_CODESIGN_IDENTITY "lldb_codesign"
+  CACHE STRING "Identity used for code signing. Set to empty string to skip the signing step.")
+if (NOT ("${LLDB_CODESIGN_IDENTITY}" STREQUAL ""))
+  execute_process(
+    COMMAND xcrun -f codesign_allocate
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+    OUTPUT_VARIABLE CODESIGN_ALLOCATE
+    )
+  add_custom_command(TARGET debugserver
+    POST_BUILD
+    # Note: --entitlements option removed (see comment above).
+    COMMAND ${CMAKE_COMMAND} -E env CODESIGN_ALLOCATE=${CODESIGN_ALLOCATE}
+            codesign --force --sign ${LLDB_CODESIGN_IDENTITY}
+            $<TARGET_FILE:debugserver>
+    WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/bin
+  )
+endif()
 
 
 
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