A64: Restore the stack limit protection to 1KB.

src/a64/simulator-a64.cc

Index: src/a64/simulator-a64.cc
diff --git a/src/a64/simulator-a64.cc b/src/a64/simulator-a64.cc
index d414bf5426e3c83ba509effb5c1f8d342d17d0d8..a401c62d2ebdf6d287b3c265a8c5ef56d92a171f 100644
--- a/src/a64/simulator-a64.cc
+++ b/src/a64/simulator-a64.cc
@@ -359,12 +359,7 @@ uintptr_t Simulator::PopAddress() {
 uintptr_t Simulator::StackLimit() const {
   // Leave a safety margin of 1024 bytes to prevent overrunning the stack when
   // pushing values.
-  // TODO(all): Increase the stack limit protection.
-
-  // The margin was decreased to 256 bytes, because we are intensively using
-  // the stack. The stack usage should decrease when our code improves. Then
-  // we can set it to 1024 again.
-  return reinterpret_cast<uintptr_t>(stack_limit_) + 256;
+  return reinterpret_cast<uintptr_t>(stack_limit_) + 1024;
 }