Bump the C stack pointer when building Dart frames to maintain the ARM64 ABI requirements without g…

runtime/vm/stub_code_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"
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/assembler.h"
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
@@ skipping 762 matching lines @@
 // Input parameters:
 //   LR : points to return address.
 //   R0 : code object of the Dart function to call.
 //   R1 : arguments descriptor array.
 //   R2 : arguments array.
 //   R3 : current thread.
 void StubCode::GenerateInvokeDartCodeStub(Assembler* assembler) {
   __ Comment("InvokeDartCodeStub");
 
   // Copy the C stack pointer (R31) into the stack pointer we'll actually use
-  // to access the stack, and put the C stack pointer at the stack limit.
-  __ SetupDartSP(OSThread::GetSpecifiedStackSize());
+  // to access the stack.
+  __ SetupDartSP();
   __ EnterFrame(0);
 
   // Push code object to PC marker slot.
   __ ldr(TMP, Address(R3, Thread::invoke_dart_code_stub_offset()));
   __ Push(TMP);
 
   // Save the callee-saved registers.
   for (int i = kAbiFirstPreservedCpuReg; i <= kAbiLastPreservedCpuReg; i++) {
     const Register r = static_cast<Register>(i);
     // We use str instead of the Push macro because we will be pushing the PP
@@ skipping 94 matching lines @@
     Register r = static_cast<Register>(i);
     // We use ldr instead of the Pop macro because we will be popping the PP
     // register when it is not holding a pool-pointer since we are returning to
     // C++ code. We also skip the dart stack pointer SP, since we are still
     // using it as the stack pointer.
     __ ldr(r, Address(SP, 1 * kWordSize, Address::PostIndex));
   }
 
   // Restore the frame pointer and C stack pointer and return.
   __ LeaveFrame();
-  __ mov(CSP, SP);
+  __ RestoreCSP();
   __ ret();
 }
 
 
 // Called for inline allocation of contexts.
 // Input:
 //   R1: number of context variables.
 // Output:
 //   R0: new allocated RawContext object.
 void StubCode::GenerateAllocateContextStub(Assembler* assembler) {
@@ skipping 1320 matching lines @@
 }
 
 
 void StubCode::GenerateFrameAwaitingMaterializationStub(Assembler* assembler) {
   __ brk(0);
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64