Implement safepointing of threads

runtime/vm/intermediate_language_arm64.cc

 // Copyright (c) 2014, 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/globals.h"  // Needed here to get TARGET_ARCH_ARM64.
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/compiler.h"
@@ skipping 778 matching lines @@
     __ AddImmediate(R2, FP, (kParamEndSlotFromFp +
                              function().NumParameters()) * kWordSize);
   } else {
     __ AddImmediate(R2, FP, kFirstLocalSlotFromFp * kWordSize);
   }
   // Compute the effective address. When running under the simulator,
   // this is a redirection address that forces the simulator to call
   // into the runtime system.
   uword entry;
   const intptr_t argc_tag = NativeArguments::ComputeArgcTag(function());
-  const bool is_leaf_call =
-      (argc_tag & NativeArguments::AutoSetupScopeMask()) == 0;
   const StubEntry* stub_entry;
   if (link_lazily()) {
     stub_entry = StubCode::CallBootstrapCFunction_entry();
     entry = NativeEntry::LinkNativeCallEntry();
   } else {
     entry = reinterpret_cast<uword>(native_c_function());
-    if (is_bootstrap_native() || is_leaf_call) {
+    if (is_bootstrap_native()) {
       stub_entry = StubCode::CallBootstrapCFunction_entry();
 #if defined(USING_SIMULATOR)
       entry = Simulator::RedirectExternalReference(
           entry, Simulator::kBootstrapNativeCall, NativeEntry::kNumArguments);
 #endif
     } else {
       // In the case of non bootstrap native methods the CallNativeCFunction
       // stub generates the redirection address when running under the simulator
       // and hence we do not change 'entry' here.
       stub_entry = StubCode::CallNativeCFunction_entry();
-#if defined(USING_SIMULATOR)
-      if (!function().IsNativeAutoSetupScope()) {
-        entry = Simulator::RedirectExternalReference(
-            entry, Simulator::kBootstrapNativeCall, NativeEntry::kNumArguments);
-      }
-#endif
     }
   }
   __ LoadImmediate(R1, argc_tag);
   ExternalLabel label(entry);
   __ LoadNativeEntry(R5, &label);
   compiler->GenerateCall(token_pos(),
                          *stub_entry,
                          RawPcDescriptors::kOther,
                          locs());
   __ Pop(result);
@@ skipping 4788 matching lines @@
                                 1,
                                 locs());
   __ Drop(1);
   __ Pop(result);
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64