[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, 3 insertions, 3 deletions

diff --git a/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp b/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
index 31ab9faca70..587b2d36acc 100644
--- a/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
+++ b/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
@@ -68,7 +68,7 @@ DynamicLoader *DynamicLoaderPOSIXDYLD::CreateInstance(Process *process,
 
   if (create)
     return new DynamicLoaderPOSIXDYLD(process);
-  return NULL;
+  return nullptr;
 }
 
 DynamicLoaderPOSIXDYLD::DynamicLoaderPOSIXDYLD(Process *process)
@@ -463,7 +463,7 @@ DynamicLoaderPOSIXDYLD::GetStepThroughTrampolinePlan(Thread &thread,
   const SymbolContext &context = frame->GetSymbolContext(eSymbolContextSymbol);
   Symbol *sym = context.symbol;
 
-  if (sym == NULL || !sym->IsTrampoline())
+  if (sym == nullptr || !sym->IsTrampoline())
     return thread_plan_sp;
 
   ConstString sym_name = sym->GetName();
@@ -638,7 +638,7 @@ addr_t DynamicLoaderPOSIXDYLD::GetEntryPoint() {
   if (m_entry_point != LLDB_INVALID_ADDRESS)
     return m_entry_point;
 
-  if (m_auxv == NULL)
+  if (m_auxv == nullptr)
     return LLDB_INVALID_ADDRESS;
 
   AuxVector::iterator I = m_auxv->FindEntry(AuxVector::AUXV_AT_ENTRY);