CSE2410 Fall 2014 Bounce

// Copyright 2006-2008 the V8 project authors. All rights reserved.

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//

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#ifndef V8_IC_INL_H_

#define V8_IC_INL_H_

#include "ic.h"

#include "debug.h"

#include "macro-assembler.h"

namespace v8 { namespace internal {

Address IC::address() {

  // Get the address of the call.

  Address result = pc() - Assembler::kTargetAddrToReturnAddrDist;

  // First check if any break points are active if not just return the address

  // of the call.

  if (!Debug::has_break_points()) return result;

  // At least one break point is active perform additional test to ensure that

  // break point locations are updated correctly.

  if (Debug::IsDebugBreak(Assembler::target_address_at(result))) {

    // If the call site is a call to debug break then return the address in

    // the original code instead of the address in the running code. This will

    // cause the original code to be updated and keeps the breakpoint active in

    // the running code.

    return OriginalCodeAddress();

  } else {

    // No break point here just return the address of the call.

    return result;

  }

}

Code* IC::GetTargetAtAddress(Address address) {

  // Get the target address of the IC.

  Address target = Assembler::target_address_at(address);

  // Convert target address to the code object. Code::GetCodeFromTargetAddress

  // is safe for use during GC where the map might be marked.

  Code* result = Code::GetCodeFromTargetAddress(target);

  ASSERT(result->is_inline_cache_stub());

  return result;

}

void IC::SetTargetAtAddress(Address address, Code* target) {

  ASSERT(target->is_inline_cache_stub());

  Assembler::set_target_address_at(address, target->instruction_start());

}

Map* IC::GetCodeCacheMapForObject(Object* object) {

  if (object->IsJSObject()) return JSObject::cast(object)->map();

  // If the object is a value, we use the prototype map for the cache.

  ASSERT(object->IsString() || object->IsNumber() || object->IsBoolean());

  return JSObject::cast(object->GetPrototype())->map();

}

} }  // namespace v8::internal

#endif  // V8_IC_INL_H_