Initial SIMDBC interpreter.

runtime/vm/thread.cc

 // Copyright (c) 2015, 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/thread.h"
 
 #include "vm/compiler_stats.h"
 #include "vm/dart_api_state.h"
 #include "vm/growable_array.h"
 #include "vm/isolate.h"
@@ skipping 300 matching lines @@
   StoreBufferRelease(StoreBuffer::kIgnoreThreshold);
   // Make sure to get an *empty* block; the isolate needs all entries
   // at GC time.
   // TODO(koda): Replace with an epilogue (PrepareAfterGC) that acquires.
   store_buffer_block_ = isolate()->store_buffer()->PopEmptyBlock();
 }
 
 
 void Thread::SetStackLimitFromStackBase(uword stack_base) {
   // Set stack limit.
+#if !defined(TARGET_ARCH_DBC)
 #if defined(USING_SIMULATOR)
   // Ignore passed-in native stack top and use Simulator stack top.
   Simulator* sim = Simulator::Current();  // May allocate a simulator.
   ASSERT(isolate()->simulator() == sim);  // Isolate's simulator is current one.
   stack_base = sim->StackTop();
   // The overflow area is accounted for by the simulator.
 #endif
   SetStackLimit(stack_base - OSThread::GetSpecifiedStackSize());
+#else
+  SetStackLimit(Simulator::Current()->StackTop());
+#endif  // !defined(TARGET_ARCH_DBC)
 }
 
 
 void Thread::SetStackLimit(uword limit) {
   // The thread setting the stack limit is not necessarily the thread which
   // the stack limit is being set on.
   MonitorLocker ml(thread_lock_);
   if (stack_limit_ == saved_stack_limit_) {
     // No interrupt pending, set stack_limit_ too.
     stack_limit_ = limit;
   }
   saved_stack_limit_ = limit;
 }
 
 
 void Thread::ClearStackLimit() {
   SetStackLimit(~static_cast<uword>(0));
 }
 
 
 /* static */
 uword Thread::GetCurrentStackPointer() {
+#if !defined(TARGET_ARCH_DBC)
   // Since AddressSanitizer's detect_stack_use_after_return instruments the
   // C++ code to give out fake stack addresses, we call a stub in that case.
   ASSERT(StubCode::GetStackPointer_entry() != NULL);
   uword (*func)() = reinterpret_cast<uword (*)()>(
       StubCode::GetStackPointer_entry()->EntryPoint());
+#else
+  uword (*func)() = NULL;
+#endif
   // But for performance (and to support simulators), we normally use a local.
 #if defined(__has_feature)
 #if __has_feature(address_sanitizer)
   uword current_sp = func();
   return current_sp;
 #else
   uword stack_allocated_local_address = reinterpret_cast<uword>(&func);
   return stack_allocated_local_address;
 #endif
 #else
@@ skipping 17 matching lines @@
   uword defer_bits = interrupt_bits & deferred_interrupts_mask_;
   if (defer_bits != 0) {
     deferred_interrupts_ |= defer_bits;
     interrupt_bits &= ~deferred_interrupts_mask_;
     if (interrupt_bits == 0) {
       return;
     }
   }
 
   if (stack_limit_ == saved_stack_limit_) {
-    stack_limit_ = (~static_cast<uword>(0)) & ~kInterruptsMask;
+    stack_limit_ = kInterruptStackLimit & ~kInterruptsMask;
   }
   stack_limit_ |= interrupt_bits;
 }
 
 
 uword Thread::GetAndClearInterrupts() {
   MonitorLocker ml(thread_lock_);
   if (stack_limit_ == saved_stack_limit_) {
     return 0;  // No interrupt was requested.
   }
@@ skipping 26 matching lines @@
   }
 }
 
 
 void Thread::RestoreOOBMessageInterrupts() {
   MonitorLocker ml(thread_lock_);
   ASSERT(deferred_interrupts_mask_ == kMessageInterrupt);
   deferred_interrupts_mask_ = 0;
   if (deferred_interrupts_ != 0) {
     if (stack_limit_ == saved_stack_limit_) {
-      stack_limit_ = (~static_cast<uword>(0)) & ~kInterruptsMask;
+      stack_limit_ = kInterruptStackLimit & ~kInterruptsMask;
     }
     stack_limit_ |= deferred_interrupts_;
     deferred_interrupts_ = 0;
   }
   if (FLAG_trace_service && FLAG_trace_service_verbose) {
     OS::Print("[+%" Pd64 "ms] Isolate %s restoring OOB interrupts\n",
               Dart::timestamp(), isolate()->name());
   }
 }
 
@@ skipping 272 matching lines @@
 
 DisableThreadInterruptsScope::~DisableThreadInterruptsScope() {
   if (thread() != NULL) {
     OSThread* os_thread = thread()->os_thread();
     ASSERT(os_thread != NULL);
     os_thread->EnableThreadInterrupts();
   }
 }
 
 }  // namespace dart