1 // Copyright 2010 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef V8_VM_STATE_INL_H_
6 #define V8_VM_STATE_INL_H_
7
8 #include "src/vm-state.h"
9 #include "src/log.h"
10 #include "src/simulator.h"
11 #include "src/tracing/trace-event.h"
12
13 namespace v8 {
14 namespace internal {
15
16 //
17 // VMState class implementation. A simple stack of VM states held by the
18 // logger and partially threaded through the call stack. States are pushed by
19 // VMState construction and popped by destruction.
20 //
StateToString(StateTag state)21 inline const char* StateToString(StateTag state) {
22 switch (state) {
23 case JS:
24 return "JS";
25 case GC:
26 return "GC";
27 case COMPILER:
28 return "COMPILER";
29 case OTHER:
30 return "OTHER";
31 case EXTERNAL:
32 return "EXTERNAL";
33 default:
34 UNREACHABLE();
35 return NULL;
36 }
37 }
38
39
40 template <StateTag Tag>
VMState(Isolate * isolate)41 VMState<Tag>::VMState(Isolate* isolate)
42 : isolate_(isolate), previous_tag_(isolate->current_vm_state()) {
43 if (FLAG_log_timer_events && previous_tag_ != EXTERNAL && Tag == EXTERNAL) {
44 LOG(isolate_, TimerEvent(Logger::START, TimerEventExternal::name()));
45 }
46 isolate_->set_current_vm_state(Tag);
47 }
48
49
50 template <StateTag Tag>
~VMState()51 VMState<Tag>::~VMState() {
52 if (FLAG_log_timer_events && previous_tag_ != EXTERNAL && Tag == EXTERNAL) {
53 LOG(isolate_, TimerEvent(Logger::END, TimerEventExternal::name()));
54 }
55 isolate_->set_current_vm_state(previous_tag_);
56 }
57
ExternalCallbackScope(Isolate * isolate,Address callback)58 ExternalCallbackScope::ExternalCallbackScope(Isolate* isolate, Address callback)
59 : isolate_(isolate),
60 callback_(callback),
61 previous_scope_(isolate->external_callback_scope()) {
62 #ifdef USE_SIMULATOR
63 scope_address_ = Simulator::current(isolate)->get_sp();
64 #endif
65 isolate_->set_external_callback_scope(this);
66 TRACE_EVENT_BEGIN0(TRACE_DISABLED_BY_DEFAULT("v8.runtime"),
67 "V8.ExternalCallback");
68 }
69
~ExternalCallbackScope()70 ExternalCallbackScope::~ExternalCallbackScope() {
71 isolate_->set_external_callback_scope(previous_scope_);
72 TRACE_EVENT_END0(TRACE_DISABLED_BY_DEFAULT("v8.runtime"),
73 "V8.ExternalCallback");
74 }
75
scope_address()76 Address ExternalCallbackScope::scope_address() {
77 #ifdef USE_SIMULATOR
78 return scope_address_;
79 #else
80 return reinterpret_cast<Address>(this);
81 #endif
82 }
83
84
85 } // namespace internal
86 } // namespace v8
87
88 #endif // V8_VM_STATE_INL_H_
89