Add support for interrupting an isolate in the vm. Interrupts are

runtime/vm/stub_code_ia32.cc

 // Copyright (c) 2011, 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_IA32)
 
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
 #include "vm/ic_data.h"
@@ skipping 211 matching lines @@
   // Remove the stub frame as we are about to jump to the dart function.
   __ LeaveFrame();
   __ movl(EAX, FieldAddress(ECX, Function::code_offset()));
 
   __ movl(ECX, FieldAddress(EAX, Code::instructions_offset()));
   __ addl(ECX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
   __ jmp(ECX);
 }
 
 
-// Stub is entered after a call but before the callee's frame has been
-// constructed.
-// Handle stack overflow by calling the runtime routine and preserving
-// the argument descriptor (EDX) and the ic-data array/function object of
-// the call (ECX).
-// The stub must be able to return to callee in case the stack overflow
-// exception is not thrown.
-void StubCode::GenerateStackOverflowStub(Assembler* assembler) {
-  __ EnterFrame(0);
-  // Stack at this point:
-  // TOS + 0: Saved EBP of previous frame. <== EBP
-  // TOS + 1: Dart code return address
-  // TOS + 2: Last argument of caller.
-  // ....
-  __ pushl(EDX);  // Preserve arguments descriptor array.
-  __ pushl(ECX);  // Preserve object (ic-data array or function object).
-  __ CallRuntimeFromStub(kStackOverflowRuntimeEntry);
-  __ popl(ECX);  // Restore object (ic-data array or function object).
-  __ popl(EDX);  // Restore arguments descriptor array.
-  __ LeaveFrame();
-  __ int3();
-}
-
-
 // Called when number of invocations exceeds
 // --optimization_invocation_threshold.
 // EAX: target function.
 // EDX: arguments descriptor array (num_args is first Smi element).
 void StubCode::GenerateOptimizeInvokedFunctionStub(Assembler* assembler) {
   __ EnterFrame(0);
   __ pushl(EDX);  // Preserve arguments descriptor array.
   __ pushl(EAX);  // Preserve target function.
   __ pushl(EAX);  // Target function.
   __ CallRuntimeFromStub(kOptimizeInvokedFunctionRuntimeEntry);
@@ skipping 1318 matching lines @@
   __ popl(EDX);
   __ popl(ECX);
   __ LeaveFrame();
   // Now call the dynamic function.
   __ jmp(&StubCode::InlineCacheLabel());
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32