Support full deoptimization during GC via stack guard.

src/execution.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 15 matching lines @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <stdlib.h>
 
 #include "v8.h"
 
 #include "api.h"
 #include "bootstrapper.h"
 #include "codegen.h"
 #include "debug.h"
+#include "deoptimizer.h"
 #include "isolate-inl.h"
 #include "runtime-profiler.h"
 #include "simulator.h"
 #include "v8threads.h"
 #include "vm-state-inl.h"
 
 namespace v8 {
 namespace internal {
 
 
@@ skipping 395 matching lines @@
 void StackGuard::RequestGC() {
   ExecutionAccess access(isolate_);
   thread_local_.interrupt_flags_ |= GC_REQUEST;
   if (thread_local_.postpone_interrupts_nesting_ == 0) {
     thread_local_.jslimit_ = thread_local_.climit_ = kInterruptLimit;
     isolate_->heap()->SetStackLimits();
   }
 }
 
 
+bool StackGuard::IsFullDeopt() {
+  ExecutionAccess access(isolate_);
+  return (thread_local_.interrupt_flags_ & FULL_DEOPT) != 0;
+}
+
+
+void StackGuard::FullDeopt() {
+  ExecutionAccess access(isolate_);
+  thread_local_.interrupt_flags_ |= FULL_DEOPT;
+  set_interrupt_limits(access);
+}
+
+
 #ifdef ENABLE_DEBUGGER_SUPPORT
 bool StackGuard::IsDebugBreak() {
   ExecutionAccess access(isolate_);
   return thread_local_.interrupt_flags_ & DEBUGBREAK;
 }
 
 
 void StackGuard::DebugBreak() {
   ExecutionAccess access(isolate_);
   thread_local_.interrupt_flags_ |= DEBUGBREAK;
@@ skipping 412 matching lines @@
   if (stack_guard->ShouldPostponeInterrupts()) {
     return isolate->heap()->undefined_value();
   }
 
   if (stack_guard->IsGCRequest()) {
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "StackGuard GC request");
     stack_guard->Continue(GC_REQUEST);
   }
 
-
   isolate->counters()->stack_interrupts()->Increment();
   isolate->counters()->runtime_profiler_ticks()->Increment();
   isolate->runtime_profiler()->OptimizeNow();
 #ifdef ENABLE_DEBUGGER_SUPPORT
   if (stack_guard->IsDebugBreak() || stack_guard->IsDebugCommand()) {
     DebugBreakHelper();
   }
 #endif
   if (stack_guard->IsPreempted()) RuntimePreempt();
   if (stack_guard->IsTerminateExecution()) {
     stack_guard->Continue(TERMINATE);
     return isolate->TerminateExecution();
   }
   if (stack_guard->IsInterrupted()) {
     stack_guard->Continue(INTERRUPT);
     return isolate->StackOverflow();
   }
+  if (stack_guard->IsFullDeopt()) {
+    stack_guard->Continue(FULL_DEOPT);
+    Deoptimizer::DeoptimizeAll(isolate);
+  }
   return isolate->heap()->undefined_value();
 }
 
 
 } }  // namespace v8::internal