[lldb] Move GetEnvironment function into common code (#122173)

Author: brad0

lldb/source/Host/common/Host.cpp

@@ -114,6 +114,10 @@ void LogChannelSystem::Initialize() {
 void LogChannelSystem::Terminate() { g_system_log.Disable(); }
 
 #if !defined(__APPLE__) && !defined(_WIN32)
+extern "C" char **environ;
+
+Environment Host::GetEnvironment() { return Environment(environ); }
+
 static thread_result_t
 MonitorChildProcessThreadFunction(::pid_t pid,
                                   Host::MonitorChildProcessCallback callback);

lldb/source/Host/freebsd/Host.cpp

@@ -33,10 +33,6 @@
 
 #include "llvm/TargetParser/Host.h"
 
-extern "C" {
-extern char **environ;
-}
-
 namespace lldb_private {
 class ProcessLaunchInfo;
 }
@@ -241,8 +237,6 @@ bool Host::GetProcessInfo(lldb::pid_t pid, ProcessInstanceInfo &process_info) {
   return false;
 }
 
-Environment Host::GetEnvironment() { return Environment(environ); }
-
 Status Host::ShellExpandArguments(ProcessLaunchInfo &launch_info) {
   return Status::FromErrorString("unimplemented");
 }

lldb/source/Host/linux/Host.cpp

@@ -411,8 +411,6 @@ bool Host::GetProcessInfo(lldb::pid_t pid, ProcessInstanceInfo &process_info) {
   return GetProcessAndStatInfo(pid, process_info, State, tracerpid);
 }
 
-Environment Host::GetEnvironment() { return Environment(environ); }
-
 Status Host::ShellExpandArguments(ProcessLaunchInfo &launch_info) {
   return Status::FromErrorString("unimplemented");
 }

lldb/source/Host/netbsd/HostNetBSD.cpp

@@ -35,19 +35,13 @@
 #include "llvm/Object/ELF.h"
 #include "llvm/TargetParser/Host.h"
 
-extern "C" {
-extern char **environ;
-}
-
 using namespace lldb;
 using namespace lldb_private;
 
 namespace lldb_private {
 class ProcessLaunchInfo;
 }
 
-Environment Host::GetEnvironment() { return Environment(environ); }
-
 static bool GetNetBSDProcessArgs(const ProcessInstanceInfoMatch *match_info_ptr,
                                  ProcessInstanceInfo &process_info) {
   if (!process_info.ProcessIDIsValid())

lldb/source/Host/openbsd/Host.cpp

@@ -30,19 +30,13 @@
 
 #include "llvm/TargetParser/Host.h"
 
-extern "C" {
-extern char **environ;
-}
-
 using namespace lldb;
 using namespace lldb_private;
 
 namespace lldb_private {
 class ProcessLaunchInfo;
 }
 
-Environment Host::GetEnvironment() { return Environment(environ); }
-
 static bool
 GetOpenBSDProcessArgs(const ProcessInstanceInfoMatch *match_info_ptr,
                       ProcessInstanceInfo &process_info) {