Switch std::call_once to llvm::call_once

Summary:
The std::call_once implementation in libstdc++ has problems on few systems: NetBSD, OpenBSD and Linux PPC. LLVM ships with a homegrown implementation llvm::call_once to help on these platforms.

This change is required in the NetBSD LLDB port. std::call_once with libstdc++ results with crashing the debugger.

Sponsored by <The NetBSD Foundation>

Reviewers: labath, joerg, emaste, mehdi_amini, clayborg

Reviewed By: labath, clayborg

Subscribers: #lldb

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D29288

llvm-svn: 294202

3 files changed, 10 insertions, 6 deletions

diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerPlatform.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerPlatform.cpp
index 7751eeea72d..67e4c653946 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerPlatform.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerPlatform.cpp
@@ -20,6 +20,7 @@
 
 // Other libraries and framework includes
 #include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Threading.h"
 
 #include "lldb/Core/Log.h"
 #include "lldb/Core/StreamGDBRemote.h"
@@ -528,9 +529,9 @@ bool GDBRemoteCommunicationServerPlatform::FreePortForProcess(lldb::pid_t pid) {
 
 const FileSpec &GDBRemoteCommunicationServerPlatform::GetDomainSocketDir() {
   static FileSpec g_domainsocket_dir;
-  static std::once_flag g_once_flag;
+  static llvm::once_flag g_once_flag;
 
-  std::call_once(g_once_flag, []() {
+  llvm::call_once(g_once_flag, []() {
     const char *domainsocket_dir_env =
         ::getenv("LLDB_DEBUGSERVER_DOMAINSOCKET_DIR");
     if (domainsocket_dir_env != nullptr)
diff --git a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
index 6766da919ae..122cd9f7eb7 100644
--- a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
@@ -81,6 +81,7 @@
 
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Threading.h"
 
 #define DEBUGSERVER_BASENAME "debugserver"
 using namespace lldb;
@@ -3434,9 +3435,9 @@ void ProcessGDBRemote::KillDebugserverProcess() {
 }
 
 void ProcessGDBRemote::Initialize() {
-  static std::once_flag g_once_flag;
+  static llvm::once_flag g_once_flag;
 
-  std::call_once(g_once_flag, []() {
+  llvm::call_once(g_once_flag, []() {
     PluginManager::RegisterPlugin(GetPluginNameStatic(),
                                   GetPluginDescriptionStatic(), CreateInstance,
                                   DebuggerInitialize);
diff --git a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemoteLog.cpp b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemoteLog.cpp
index 899037ae98a..7735cc0ba99 100644
--- a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemoteLog.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemoteLog.cpp
@@ -14,6 +14,8 @@
 #include "lldb/Core/StreamFile.h"
 #include "lldb/Interpreter/Args.h"
 
+#include "llvm/Support/Threading.h"
+
 #include "ProcessGDBRemote.h"
 
 using namespace lldb;
@@ -34,9 +36,9 @@ static Log *GetLog() {
 
 void ProcessGDBRemoteLog::Initialize() {
   static ConstString g_name("gdb-remote");
-  static std::once_flag g_once_flag;
+  static llvm::once_flag g_once_flag;
 
-  std::call_once(g_once_flag, []() {
+  llvm::call_once(g_once_flag, []() {
     Log::Callbacks log_callbacks = {DisableLog, EnableLog, ListLogCategories};
 
     Log::RegisterLogChannel(g_name, log_callbacks);