1// Copyright 2010 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28#ifndef V8_VM_STATE_INL_H_
29#define V8_VM_STATE_INL_H_
30
31#include "vm-state.h"
32#include "log.h"
33#include "simulator.h"
34
35namespace v8 {
36namespace internal {
37
38//
39// VMState class implementation.  A simple stack of VM states held by the
40// logger and partially threaded through the call stack.  States are pushed by
41// VMState construction and popped by destruction.
42//
43inline const char* StateToString(StateTag state) {
44  switch (state) {
45    case JS:
46      return "JS";
47    case GC:
48      return "GC";
49    case COMPILER:
50      return "COMPILER";
51    case OTHER:
52      return "OTHER";
53    case EXTERNAL:
54      return "EXTERNAL";
55    default:
56      UNREACHABLE();
57      return NULL;
58  }
59}
60
61
62template <StateTag Tag>
63VMState<Tag>::VMState(Isolate* isolate)
64    : isolate_(isolate), previous_tag_(isolate->current_vm_state()) {
65  if (FLAG_log_timer_events && previous_tag_ != EXTERNAL && Tag == EXTERNAL) {
66    LOG(isolate_,
67        TimerEvent(Logger::START, Logger::TimerEventScope::v8_external));
68  }
69  isolate_->set_current_vm_state(Tag);
70}
71
72
73template <StateTag Tag>
74VMState<Tag>::~VMState() {
75  if (FLAG_log_timer_events && previous_tag_ != EXTERNAL && Tag == EXTERNAL) {
76    LOG(isolate_,
77        TimerEvent(Logger::END, Logger::TimerEventScope::v8_external));
78  }
79  isolate_->set_current_vm_state(previous_tag_);
80}
81
82
83ExternalCallbackScope::ExternalCallbackScope(Isolate* isolate, Address callback)
84    : isolate_(isolate),
85      callback_(callback),
86      previous_scope_(isolate->external_callback_scope()) {
87#ifdef USE_SIMULATOR
88  int32_t sp = Simulator::current(isolate)->get_register(Simulator::sp);
89  scope_address_ = reinterpret_cast<Address>(static_cast<intptr_t>(sp));
90#endif
91  isolate_->set_external_callback_scope(this);
92}
93
94ExternalCallbackScope::~ExternalCallbackScope() {
95  isolate_->set_external_callback_scope(previous_scope_);
96}
97
98Address ExternalCallbackScope::scope_address() {
99#ifdef USE_SIMULATOR
100  return scope_address_;
101#else
102  return reinterpret_cast<Address>(this);
103#endif
104}
105
106
107} }  // namespace v8::internal
108
109#endif  // V8_VM_STATE_INL_H_
110