[lldb] NFC modernize codebase with modernize-use-nullptr

Summary:
NFC = [[ https://llvm.org/docs/Lexicon.html#nfc | Non functional change ]]

This commit is the result of modernizing the LLDB codebase by using
`nullptr` instread of `0` or `NULL`. See
https://clang.llvm.org/extra/clang-tidy/checks/modernize-use-nullptr.html
for more information.

This is the command I ran and I to fix and format the code base:

```
run-clang-tidy.py \
	-header-filter='.*' \
	-checks='-*,modernize-use-nullptr' \
	-fix ~/dev/llvm-project/lldb/.* \
	-format \
	-style LLVM \
	-p ~/llvm-builds/debug-ninja-gcc
```

NOTE: There were also changes to `llvm/utils/unittest` but I did not
include them because I felt that maybe this library shall be updated in
isolation somehow.

NOTE: I know this is a rather large commit but it is a nobrainer in most
parts.

Reviewers: martong, espindola, shafik, #lldb, JDevlieghere

Reviewed By: JDevlieghere

Subscribers: arsenm, jvesely, nhaehnle, hiraditya, JDevlieghere, teemperor, rnkovacs, emaste, kubamracek, nemanjai, ki.stfu, javed.absar, arichardson, kbarton, jrtc27, MaskRay, atanasyan, dexonsmith, arphaman, jfb, jsji, jdoerfert, lldb-commits, llvm-commits

Tags: #lldb, #llvm

Differential Revision: https://reviews.llvm.org/D61847

llvm-svn: 361484

1 files changed, 8 insertions, 8 deletions

diff --git a/lldb/source/Plugins/OperatingSystem/Python/OperatingSystemPython.cpp b/lldb/source/Plugins/OperatingSystem/Python/OperatingSystemPython.cpp
index 874ca85..c1fe0cc 100644
--- a/lldb/source/Plugins/OperatingSystem/Python/OperatingSystemPython.cpp
+++ b/lldb/source/Plugins/OperatingSystem/Python/OperatingSystemPython.cpp
@@ -59,7 +59,7 @@ OperatingSystem *OperatingSystemPython::CreateInstance(Process *process,
     if (os_up.get() && os_up->IsValid())
       return os_up.release();
   }
-  return NULL;
+  return nullptr;
 }
 
 ConstString OperatingSystemPython::GetPluginNameStatic() {
@@ -75,7 +75,7 @@ const char *OperatingSystemPython::GetPluginDescriptionStatic() {
 OperatingSystemPython::OperatingSystemPython(lldb_private::Process *process,
                                              const FileSpec &python_module_path)
     : OperatingSystem(process), m_thread_list_valobj_sp(), m_register_info_up(),
-      m_interpreter(NULL), m_python_object_sp() {
+      m_interpreter(nullptr), m_python_object_sp() {
   if (!process)
     return;
   TargetSP target_sp = process->CalculateTarget();
@@ -115,9 +115,9 @@ OperatingSystemPython::OperatingSystemPython(lldb_private::Process *process,
 OperatingSystemPython::~OperatingSystemPython() {}
 
 DynamicRegisterInfo *OperatingSystemPython::GetDynamicRegisterInfo() {
-  if (m_register_info_up == NULL) {
+  if (m_register_info_up == nullptr) {
     if (!m_interpreter || !m_python_object_sp)
-      return NULL;
+      return nullptr;
     Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OS));
 
     if (log)
@@ -128,7 +128,7 @@ DynamicRegisterInfo *OperatingSystemPython::GetDynamicRegisterInfo() {
     StructuredData::DictionarySP dictionary =
         m_interpreter->OSPlugin_RegisterInfo(m_python_object_sp);
     if (!dictionary)
-      return NULL;
+      return nullptr;
 
     m_register_info_up.reset(new DynamicRegisterInfo(
         *dictionary, m_process->GetTarget().GetArchitecture()));
@@ -198,9 +198,9 @@ bool OperatingSystemPython::UpdateThreadList(ThreadList &old_thread_list,
       StructuredData::ObjectSP thread_dict_obj =
           threads_list->GetItemAtIndex(i);
       if (auto thread_dict = thread_dict_obj->GetAsDictionary()) {
-        ThreadSP thread_sp(
-            CreateThreadFromThreadInfo(*thread_dict, core_thread_list,
-                                       old_thread_list, core_used_map, NULL));
+        ThreadSP thread_sp(CreateThreadFromThreadInfo(
+            *thread_dict, core_thread_list, old_thread_list, core_used_map,
+            nullptr));
         if (thread_sp)
           new_thread_list.AddThread(thread_sp);
       }