Version 4.6.85.9 (cherry-pick)

src/arm64/simulator-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdlib.h>
 #include <cmath>
 #include <cstdarg>
 
 #if V8_TARGET_ARCH_ARM64
 
@@ skipping 204 matching lines @@
     CallArgument(direct_call),
     CallArgument(return_address),
     CallArgument(isolate),
     CallArgument::End()
   };
   return CallInt64(entry, args);
 }
 
 
 void Simulator::CheckPCSComplianceAndRun() {
+  // Adjust JS-based stack limit to C-based stack limit.
+  isolate_->stack_guard()->AdjustStackLimitForSimulator();
+
 #ifdef DEBUG
   CHECK_EQ(kNumberOfCalleeSavedRegisters, kCalleeSaved.Count());
   CHECK_EQ(kNumberOfCalleeSavedFPRegisters, kCalleeSavedFP.Count());
 
   int64_t saved_registers[kNumberOfCalleeSavedRegisters];
   uint64_t saved_fpregisters[kNumberOfCalleeSavedFPRegisters];
 
   CPURegList register_list = kCalleeSaved;
   CPURegList fpregister_list = kCalleeSavedFP;
 
@@ skipping 90 matching lines @@
   intptr_t current_sp = sp();
   uintptr_t* stack_slot = reinterpret_cast<uintptr_t*>(current_sp);
   uintptr_t address = *stack_slot;
   DCHECK(sizeof(uintptr_t) < 2 * kXRegSize);
   set_sp(current_sp + 2 * kXRegSize);
   return address;
 }
 
 
 // Returns the limit of the stack area to enable checking for stack overflows.
-uintptr_t Simulator::StackLimit() const {
-  // Leave a safety margin of 1024 bytes to prevent overrunning the stack when
-  // pushing values.
+uintptr_t Simulator::StackLimit(uintptr_t c_limit) const {
+  // The simulator uses a separate JS stack. If we have exhausted the C stack,
+  // we also drop down the JS limit to reflect the exhaustion on the JS stack.
+  if (GetCurrentStackPosition() < c_limit) {
+    return reinterpret_cast<uintptr_t>(get_sp());
+  }
+
+  // Otherwise the limit is the JS stack. Leave a safety margin of 1024 bytes
+  // to prevent overrunning the stack when pushing values.
   return stack_limit_ + 1024;
 }
 
 
 Simulator::Simulator(Decoder<DispatchingDecoderVisitor>* decoder,
                      Isolate* isolate, FILE* stream)
     : decoder_(decoder),
       last_debugger_input_(NULL),
       log_parameters_(NO_PARAM),
       isolate_(isolate) {
@@ skipping 3480 matching lines @@
   delete[] format;
 }
 
 
 #endif  // USE_SIMULATOR
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64