[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, 6 insertions, 6 deletions

diff --git a/lldb/source/Plugins/SymbolFile/Symtab/SymbolFileSymtab.cpp b/lldb/source/Plugins/SymbolFile/Symtab/SymbolFileSymtab.cpp
index 7fa3a1c5d650..a1b21e51b0fe 100644
--- a/lldb/source/Plugins/SymbolFile/Symtab/SymbolFileSymtab.cpp
+++ b/lldb/source/Plugins/SymbolFile/Symtab/SymbolFileSymtab.cpp
@@ -139,8 +139,8 @@ size_t SymbolFileSymtab::ParseFunctions(CompileUnit &comp_unit) {
   size_t num_added = 0;
   // We must at least have a valid compile unit
   const Symtab *symtab = m_obj_file->GetSymtab();
-  const Symbol *curr_symbol = NULL;
-  const Symbol *next_symbol = NULL;
+  const Symbol *curr_symbol = nullptr;
+  const Symbol *next_symbol = nullptr;
   //  const char *prefix = m_obj_file->SymbolPrefix();
   //  if (prefix == NULL)
   //      prefix == "";
@@ -188,10 +188,10 @@ size_t SymbolFileSymtab::ParseFunctions(CompileUnit &comp_unit) {
                              LLDB_INVALID_UID, // We don't have any type info
                                                // for this function
                              curr_symbol->GetMangled(), // Linker/mangled name
-                             NULL, // no return type for a code symbol...
+                             nullptr, // no return type for a code symbol...
                              func_range)); // first address range
 
-            if (func_sp.get() != NULL) {
+            if (func_sp.get() != nullptr) {
               comp_unit.AddFunction(func_sp);
               ++num_added;
             }
@@ -230,7 +230,7 @@ size_t SymbolFileSymtab::ParseVariablesForContext(const SymbolContext &sc) {
 }
 
 Type *SymbolFileSymtab::ResolveTypeUID(lldb::user_id_t type_uid) {
-  return NULL;
+  return nullptr;
 }
 
 llvm::Optional<SymbolFile::ArrayInfo>
@@ -246,7 +246,7 @@ bool SymbolFileSymtab::CompleteType(lldb_private::CompilerType &compiler_type) {
 uint32_t SymbolFileSymtab::ResolveSymbolContext(const Address &so_addr,
                                                 SymbolContextItem resolve_scope,
                                                 SymbolContext &sc) {
-  if (m_obj_file->GetSymtab() == NULL)
+  if (m_obj_file->GetSymtab() == nullptr)
     return 0;
 
   uint32_t resolved_flags = 0;