Keep track of stack base whenever Dart code is invoked.

runtime/vm/dart_entry.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/dart_entry.h"
 
 #include "vm/class_finalizer.h"
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
 #include "vm/debugger.h"
@@ skipping 20 matching lines @@
 RawObject* DartEntry::InvokeFunction(const Function& function,
                                      const Array& arguments,
                                      const Array& arguments_descriptor) {
   const Context& context =
       Context::Handle(Isolate::Current()->object_store()->empty_context());
   ASSERT(context.isolate() == Isolate::Current());
   return InvokeFunction(function, arguments, arguments_descriptor, context);
 }
 
 
+class ScopedIsolateStackLimits : public ValueObject {
+ public:
+  explicit ScopedIsolateStackLimits(Isolate* isolate)
+      : isolate_(isolate) {
+    ASSERT(isolate_ != NULL);
+    ASSERT(isolate_ == Isolate::Current());
+    uword stack_base = reinterpret_cast<uword>(this);
+    if (stack_base >= isolate_->stack_base()) {
+      isolate_->SetStackLimitFromStackBase(stack_base);
+    }
+  }
+
+  ~ScopedIsolateStackLimits() {
+    ASSERT(isolate_ == Isolate::Current());
+    uword stack_base = reinterpret_cast<uword>(this);
+    if (isolate_->stack_base() == stack_base) {
+      // Bottomed out.
+      isolate_->ClearStackLimit();
+    }
+  }
+
+ private:
+  Isolate* isolate_;
+};
+
+
 RawObject* DartEntry::InvokeFunction(const Function& function,
                                      const Array& arguments,
                                      const Array& arguments_descriptor,
                                      const Context& context) {
   // Get the entrypoint corresponding to the function specified, this
   // will result in a compilation of the function if it is not already
   // compiled.
   Isolate* isolate = Isolate::Current();
   if (!function.HasCode()) {
     const Error& error = Error::Handle(
         isolate, Compiler::CompileFunction(isolate, function));
     if (!error.IsNull()) {
       return error.raw();
     }
   }
   // Now Call the invoke stub which will invoke the dart function.
   invokestub entrypoint = reinterpret_cast<invokestub>(
       isolate->stub_code()->InvokeDartCodeEntryPoint());
   const Code& code = Code::Handle(isolate, function.CurrentCode());
   ASSERT(!code.IsNull());
   ASSERT(Isolate::Current()->no_callback_scope_depth() == 0);
+  ScopedIsolateStackLimits stack_limit(isolate);
 #if defined(USING_SIMULATOR)
 #if defined(ARCH_IS_64_BIT)
   // TODO(zra): Change to intptr_t so we have only one case.
     return bit_copy<RawObject*, int64_t>(Simulator::Current()->Call(
         reinterpret_cast<int64_t>(entrypoint),
         static_cast<int64_t>(code.EntryPoint()),
         reinterpret_cast<int64_t>(&arguments_descriptor),
         reinterpret_cast<int64_t>(&arguments),
         reinterpret_cast<int64_t>(&context)));
 #else
@@ skipping 409 matching lines @@
   const Array& args = Array::Handle(Array::New(kNumArguments));
   args.SetAt(0, map);
   args.SetAt(1, key);
   args.SetAt(2, value);
   const Object& result = Object::Handle(DartEntry::InvokeFunction(function,
                                                                   args));
   return result.raw();
 }
 
 }  // namespace dart