[Isolates] Move contents of Top into Isolate....

src/platform-linux.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 38 matching lines @@
 #endif  // def __GLIBC__
 #include <strings.h>    // index
 #include <errno.h>
 #include <stdarg.h>
 
 #undef MAP_TYPE
 
 #include "v8.h"
 
 #include "platform.h"
-#include "top.h"
 #include "v8threads.h"
 
 
 namespace v8 {
 namespace internal {
 
 // 0 is never a valid thread id on Linux since tids and pids share a
 // name space and pid 0 is reserved (see man 2 kill).
 static const pthread_t kNoThread = (pthread_t) 0;
 
@@ skipping 655 matching lines @@
 // So, if the signal is being handled in the context of a non-VM thread,
 // it means that the VM thread is running, and trying to sample its stack can
 // cause a crash.
 static inline bool IsVmThread() {
   // In the case of a single VM thread, this check is enough.
   if (pthread_equal(pthread_self(), vm_thread_)) return true;
   // If there are multiple threads that use VM, they must have a thread id
   // stored in TLS. To verify that the thread is really executing VM,
   // we check Top's data. Having that ThreadManager::RestoreThread first
   // restores ThreadLocalTop from TLS, and only then erases the TLS value,
-  // reading Top::thread_id() should not be affected by races.
+  // reading Isolate::thread_id() should not be affected by races.
   if (ThreadManager::HasId() && !ThreadManager::IsArchived() &&
-      ThreadManager::CurrentId() == Top::thread_id()) {
+      ThreadManager::CurrentId() == Isolate::Current()->thread_id()) {
     return true;
   }
   return false;
 }
 
 
 static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
 #ifndef V8_HOST_ARCH_MIPS
   USE(info);
   if (signal != SIGPROF) return;
@@ skipping 105 matching lines @@
 
   // This sampler is no longer the active sampler.
   active_sampler_ = NULL;
   active_ = false;
 }
 
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal