Make Simulator respect C stack limits as well.

src/execution.cc

Index: src/execution.cc
diff --git a/src/execution.cc b/src/execution.cc
index 9a1ab3597b3db011a1fb7e95ea9b6bd8d13e846f..cb14a36c8fbe4d974c1b9fa0ae69a21f5bfa5f8b 100644
--- a/src/execution.cc
+++ b/src/execution.cc
@@ -341,14 +341,6 @@ MaybeHandle<Object> Execution::TryGetConstructorDelegate(
 }
 
 
-void StackGuard::EnableInterrupts() {
-  ExecutionAccess access(isolate_);
-  if (has_pending_interrupts(access)) {
-    set_interrupt_limits(access);
-  }
-}
-
-
 void StackGuard::SetStackLimit(uintptr_t limit) {
   ExecutionAccess access(isolate_);
   // If the current limits are special (e.g. due to a pending interrupt) then
@@ -365,6 +357,27 @@ void StackGuard::SetStackLimit(uintptr_t limit) {
 }
 
 
+void StackGuard::AdjustStackLimitForSimulator() {
+  ExecutionAccess access(isolate_);
+  uintptr_t climit = thread_local_.real_climit_;
+  // If the current limits are special (e.g. due to a pending interrupt) then
+  // leave them alone.
+  uintptr_t jslimit = SimulatorStack::JsLimitFromCLimit(isolate_, climit);
+  if (thread_local_.jslimit() == thread_local_.real_jslimit_) {
+    thread_local_.set_jslimit(jslimit);
+    isolate_->heap()->SetStackLimits();
+  }
+}
+
+
+void StackGuard::EnableInterrupts() {
+  ExecutionAccess access(isolate_);
+  if (has_pending_interrupts(access)) {
+    set_interrupt_limits(access);
+  }
+}
+
+
 void StackGuard::DisableInterrupts() {
   ExecutionAccess access(isolate_);
   reset_limits(access);