[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, 5 insertions, 5 deletions

diff --git a/lldb/source/API/SBProcess.cpp b/lldb/source/API/SBProcess.cpp
index d97494b3..4226ff7 100644
--- a/lldb/source/API/SBProcess.cpp
+++ b/lldb/source/API/SBProcess.cpp
@@ -335,7 +335,7 @@ void SBProcess::ReportEventState(const SBEvent &event, FILE *out) const {
   LLDB_RECORD_METHOD_CONST(void, SBProcess, ReportEventState,
                            (const lldb::SBEvent &, FILE *), event, out);
 
-  if (out == NULL)
+  if (out == nullptr)
     return;
 
   ProcessSP process_sp(GetSP());
@@ -534,7 +534,7 @@ int SBProcess::GetExitStatus() {
 const char *SBProcess::GetExitDescription() {
   LLDB_RECORD_METHOD_NO_ARGS(const char *, SBProcess, GetExitDescription);
 
-  const char *exit_desc = NULL;
+  const char *exit_desc = nullptr;
   ProcessSP process_sp(GetSP());
   if (process_sp) {
     std::lock_guard<std::recursive_mutex> guard(
@@ -602,7 +602,7 @@ SBError SBProcess::Continue() {
     if (process_sp->GetTarget().GetDebugger().GetAsyncExecution())
       sb_error.ref() = process_sp->Resume();
     else
-      sb_error.ref() = process_sp->ResumeSynchronous(NULL);
+      sb_error.ref() = process_sp->ResumeSynchronous(nullptr);
   } else
     sb_error.SetErrorString("SBProcess is invalid");
 
@@ -985,7 +985,7 @@ bool SBProcess::GetDescription(SBStream &description) {
     char path[PATH_MAX];
     GetTarget().GetExecutable().GetPath(path, sizeof(path));
     Module *exe_module = process_sp->GetTarget().GetExecutableModulePointer();
-    const char *exe_name = NULL;
+    const char *exe_name = nullptr;
     if (exe_module)
       exe_name = exe_module->GetFileSpec().GetFilename().AsCString();
 
@@ -1156,7 +1156,7 @@ const char *SBProcess::GetExtendedBacktraceTypeAtIndex(uint32_t idx) {
       return names[idx].AsCString();
     }
   }
-  return NULL;
+  return nullptr;
 }
 
 SBThreadCollection SBProcess::GetHistoryThreads(addr_t addr) {