- Add an OSThread structure which is the generic TLS structure for all C++

runtime/vm/isolate.h

Index: runtime/vm/isolate.h
diff --git a/runtime/vm/isolate.h b/runtime/vm/isolate.h
index 5f721a3cf5de9fc0655976ed3c53d083facda334..979888dc41021736549dd5ffa3ba01590aed9e67 100644
--- a/runtime/vm/isolate.h
+++ b/runtime/vm/isolate.h
@@ -254,8 +254,6 @@ class Isolate : public BaseIsolate {
   // The true stack limit for this isolate.
   uword saved_stack_limit() const { return saved_stack_limit_; }
 
-  uword stack_base() const { return stack_base_; }
-
   // Stack overflow flags
   enum {
     kOsrRequest = 0x1,  // Current stack overflow caused by OSR request.
@@ -274,13 +272,6 @@ class Isolate : public BaseIsolate {
   // stack overflow is called.
   uword GetAndClearStackOverflowFlags();
 
-  // Retrieve the stack address bounds for profiler.
-  bool GetProfilerStackBounds(uword* lower, uword* upper) const;
-
-  static uword GetSpecifiedStackSize();
-
-  static const intptr_t kStackSizeBuffer = (4 * KB * kWordSize);
-
   // Interrupt bits.
   enum {
     kVMInterrupt = 0x1,  // Internal VM checks: safepoints, store buffers, etc.
@@ -771,7 +762,6 @@ class Isolate : public BaseIsolate {
   Simulator* simulator_;
   Mutex* mutex_;  // protects stack_limit_, saved_stack_limit_, compiler stats.
   uword saved_stack_limit_;
-  uword stack_base_;
   uword stack_overflow_flags_;
   int32_t stack_overflow_count_;
   MessageHandler* message_handler_;
@@ -908,7 +898,7 @@ class StartIsolateScope {
     if (saved_isolate_ != new_isolate_) {
       ASSERT(Isolate::Current() == NULL);
       // Ensure this is not a nested 'isolate enter' with prior state.
-      ASSERT(new_isolate_->stack_base() == 0);
+      ASSERT(new_isolate_->saved_stack_limit() == 0);
       Thread::EnterIsolate(new_isolate_);
     }
   }
@@ -922,7 +912,7 @@ class StartIsolateScope {
     if (saved_isolate_ != new_isolate_) {
       ASSERT(saved_isolate_ == NULL);
       // ASSERT that we have bottomed out of all Dart invocations.
-      ASSERT(new_isolate_->stack_base() == 0);
+      ASSERT(new_isolate_->saved_stack_limit() == 0);
       Thread::ExitIsolate();
     }
   }