blob: eb0c02cf6dbce134431f175a47f4e5673c6f0e40 [file] [log] [blame] [edit]
// Copyright (c) 2014, 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/tags.h"
#include "platform/utils.h"
#include "vm/isolate.h"
#include "vm/json_stream.h"
#include "vm/native_entry.h"
#include "vm/object.h"
#include "vm/runtime_entry.h"
namespace dart {
MallocGrowableArray<const char*> UserTags::subscribed_tags_(4);
Mutex* UserTags::subscribed_tags_lock_ = nullptr;
const char* VMTag::TagName(uword tag) {
if (IsNativeEntryTag(tag)) {
const uint8_t* native_reverse_lookup = NativeEntry::ResolveSymbol(tag);
if (native_reverse_lookup != nullptr) {
return reinterpret_cast<const char*>(native_reverse_lookup);
}
return "Unknown native entry";
} else if (IsRuntimeEntryTag(tag)) {
const char* runtime_entry_name = RuntimeEntryTagName(tag);
ASSERT(runtime_entry_name != nullptr);
return runtime_entry_name;
}
ASSERT(tag != kInvalidTagId);
ASSERT(tag < kNumVMTags);
const TagEntry& entry = entries_[tag];
ASSERT(entry.id == tag);
return entry.name;
}
bool VMTag::IsNativeEntryTag(uword tag) {
return (tag > kLastTagId) && !IsRuntimeEntryTag(tag);
}
bool VMTag::IsExitFrameTag(uword id) {
return (id != 0) && !IsDartTag(id) && (id != kIdleTagId) &&
(id != kVMTagId) && (id != kEmbedderTagId);
}
bool VMTag::IsRuntimeEntryTag(uword id) {
return RuntimeEntryTagName(id) != nullptr;
}
const char* VMTag::RuntimeEntryTagName(uword id) {
const void* address = reinterpret_cast<const void*>(id);
#define CHECK_RUNTIME_ADDRESS(n) \
if (address == k##n##RuntimeEntry.function()) \
return k##n##RuntimeEntry.name();
RUNTIME_ENTRY_LIST(CHECK_RUNTIME_ADDRESS)
#undef CHECK_RUNTIME_ADDRESS
#define CHECK_LEAF_RUNTIME_ADDRESS(type, n, ...) \
if (address == k##n##RuntimeEntry.function()) \
return k##n##RuntimeEntry.name();
LEAF_RUNTIME_ENTRY_LIST(CHECK_LEAF_RUNTIME_ADDRESS)
#undef CHECK_LEAF_RUNTIME_ADDRESS
return nullptr;
}
const VMTag::TagEntry VMTag::entries_[] = {
{
"InvalidTag",
kInvalidTagId,
},
#define DEFINE_VM_TAG_ENTRY(tag) {"" #tag, k##tag##TagId},
VM_TAG_LIST(DEFINE_VM_TAG_ENTRY)
#undef DEFINE_VM_TAG_ENTRY
{"kNumVMTags", kNumVMTags},
};
VMTagScope::VMTagScope(Thread* thread, uword tag, bool conditional_set)
: ThreadStackResource(thread) {
if (thread != nullptr) {
ASSERT(isolate_group() != nullptr);
previous_tag_ = thread->vm_tag();
if (conditional_set) {
thread->set_vm_tag(tag);
}
}
}
VMTagScope::~VMTagScope() {
if (thread() != nullptr) {
ASSERT(isolate_group() != nullptr);
thread()->set_vm_tag(previous_tag_);
}
}
VMTagCounters::VMTagCounters() {
for (intptr_t i = 0; i < VMTag::kNumVMTags; i++) {
counters_[i] = 0;
}
}
void VMTagCounters::Increment(uword tag) {
ASSERT(tag != VMTag::kInvalidTagId);
if (tag < VMTag::kNumVMTags) {
counters_[tag]++;
} else if (VMTag::IsRuntimeEntryTag(tag)) {
counters_[VMTag::kRuntimeTagId]++;
} else {
// Assume native entry.
counters_[VMTag::kNativeTagId]++;
}
}
int64_t VMTagCounters::count(uword tag) {
ASSERT(tag != VMTag::kInvalidTagId);
ASSERT(tag < VMTag::kNumVMTags);
return counters_[tag];
}
#ifndef PRODUCT
void VMTagCounters::PrintToJSONObject(JSONObject* obj) {
{
JSONArray arr(obj, "names");
for (intptr_t i = 1; i < VMTag::kNumVMTags; i++) {
arr.AddValue(VMTag::TagName(i));
}
}
{
JSONArray arr(obj, "counters");
for (intptr_t i = 1; i < VMTag::kNumVMTags; i++) {
arr.AddValue64(counters_[i]);
}
}
}
#endif // !PRODUCT
const char* UserTags::TagName(uword tag_id) {
ASSERT(tag_id >= kUserTagIdOffset);
ASSERT(tag_id < kUserTagIdOffset + kMaxUserTags);
const Thread* thread = Thread::Current();
Zone* zone = thread->zone();
Isolate* isolate = thread->isolate();
const UserTag& tag =
UserTag::Handle(zone, UserTag::FindTagById(isolate, tag_id));
ASSERT(!tag.IsNull());
const String& label = String::Handle(zone, tag.label());
return label.ToCString();
}
void UserTags::AddStreamableTagName(const char* tag) {
MutexLocker ml(subscribed_tags_lock_);
// Check this tag isn't already in the subscription list.
for (intptr_t i = 0; i < subscribed_tags_.length(); ++i) {
if (strcmp(tag, subscribed_tags_.At(i)) == 0) {
return;
}
}
subscribed_tags_.Add(Utils::StrDup(tag));
}
void UserTags::RemoveStreamableTagName(const char* tag) {
MutexLocker ml(subscribed_tags_lock_);
bool found = false;
for (intptr_t i = 0; i < subscribed_tags_.length(); ++i) {
if (strcmp(tag, subscribed_tags_.At(i)) == 0) {
free(const_cast<char*>(subscribed_tags_.At(i)));
subscribed_tags_.RemoveAt(i);
found = true;
break;
}
}
ASSERT(found);
}
bool UserTags::IsTagNameStreamable(const char* tag) {
MutexLocker ml(subscribed_tags_lock_);
for (intptr_t i = 0; i < subscribed_tags_.length(); ++i) {
if (strcmp(tag, subscribed_tags_.At(i)) == 0) {
return true;
}
}
return false;
}
void UserTags::Init() {
subscribed_tags_lock_ = new Mutex();
}
void UserTags::Cleanup() {
{
MutexLocker ml(subscribed_tags_lock_);
for (intptr_t i = 0; i < subscribed_tags_.length(); ++i) {
free(const_cast<char*>(subscribed_tags_.At(i)));
}
subscribed_tags_.Clear();
}
delete subscribed_tags_lock_;
subscribed_tags_lock_ = nullptr;
}
} // namespace dart