blob: 2127a1e1ca78179be71aedab100cc152b9c7e8e7 [file] [log] [blame]
// Copyright 2011 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <map>
#include "include/v8-profiler.h"
#include "src/allocation.h"
#include "src/hashmap.h"
namespace v8 {
namespace internal {
struct OffsetRange;
// Provides a storage of strings allocated in C++ heap, to hold them
// forever, even if they disappear from JS heap or external storage.
class StringsStorage {
explicit StringsStorage(Heap* heap);
const char* GetCopy(const char* src);
const char* GetFormatted(const char* format, ...);
const char* GetVFormatted(const char* format, va_list args);
const char* GetName(Name* name);
const char* GetName(int index);
const char* GetFunctionName(Name* name);
const char* GetFunctionName(const char* name);
size_t GetUsedMemorySize() const;
static const int kMaxNameSize = 1024;
static bool StringsMatch(void* key1, void* key2);
const char* AddOrDisposeString(char* str, int len);
HashMap::Entry* GetEntry(const char* str, int len);
uint32_t hash_seed_;
HashMap names_;
// Provides a mapping from the offsets within generated code to
// the source line.
class JITLineInfoTable : public Malloced {
void SetPosition(int pc_offset, int line);
int GetSourceLineNumber(int pc_offset) const;
bool empty() const { return pc_offset_map_.empty(); }
// pc_offset -> source line
typedef std::map<int, int> PcOffsetMap;
PcOffsetMap pc_offset_map_;
class CodeEntry {
// CodeEntry doesn't own name strings, just references them.
inline CodeEntry(Logger::LogEventsAndTags tag, const char* name,
const char* name_prefix = CodeEntry::kEmptyNamePrefix,
const char* resource_name = CodeEntry::kEmptyResourceName,
int line_number = v8::CpuProfileNode::kNoLineNumberInfo,
int column_number = v8::CpuProfileNode::kNoColumnNumberInfo,
JITLineInfoTable* line_info = NULL,
Address instruction_start = NULL);
bool is_js_function() const { return is_js_function_tag(tag()); }
const char* name_prefix() const { return name_prefix_; }
bool has_name_prefix() const { return name_prefix_[0] != '\0'; }
const char* name() const { return name_; }
const char* resource_name() const { return resource_name_; }
int line_number() const { return line_number_; }
int column_number() const { return column_number_; }
const JITLineInfoTable* line_info() const { return line_info_; }
void set_shared_id(int shared_id) { shared_id_ = shared_id; }
int script_id() const { return script_id_; }
void set_script_id(int script_id) { script_id_ = script_id; }
void set_bailout_reason(const char* bailout_reason) {
bailout_reason_ = bailout_reason;
const char* bailout_reason() const { return bailout_reason_; }
static inline bool is_js_function_tag(Logger::LogEventsAndTags tag);
List<OffsetRange>* no_frame_ranges() const { return no_frame_ranges_; }
void set_no_frame_ranges(List<OffsetRange>* ranges) {
no_frame_ranges_ = ranges;
void SetBuiltinId(Builtins::Name id);
Builtins::Name builtin_id() const {
return BuiltinIdField::decode(bit_field_);
uint32_t GetCallUid() const;
bool IsSameAs(CodeEntry* entry) const;
int GetSourceLine(int pc_offset) const;
Address instruction_start() const { return instruction_start_; }
static const char* const kEmptyNamePrefix;
static const char* const kEmptyResourceName;
static const char* const kEmptyBailoutReason;
class TagField : public BitField<Logger::LogEventsAndTags, 0, 8> {};
class BuiltinIdField : public BitField<Builtins::Name, 8, 8> {};
Logger::LogEventsAndTags tag() const { return TagField::decode(bit_field_); }
uint32_t bit_field_;
const char* name_prefix_;
const char* name_;
const char* resource_name_;
int line_number_;
int column_number_;
int shared_id_;
int script_id_;
List<OffsetRange>* no_frame_ranges_;
const char* bailout_reason_;
JITLineInfoTable* line_info_;
Address instruction_start_;
class ProfileTree;
class ProfileNode {
inline ProfileNode(ProfileTree* tree, CodeEntry* entry);
ProfileNode* FindChild(CodeEntry* entry);
ProfileNode* FindOrAddChild(CodeEntry* entry);
void IncrementSelfTicks() { ++self_ticks_; }
void IncreaseSelfTicks(unsigned amount) { self_ticks_ += amount; }
void IncrementLineTicks(int src_line);
CodeEntry* entry() const { return entry_; }
unsigned self_ticks() const { return self_ticks_; }
const List<ProfileNode*>* children() const { return &children_list_; }
unsigned id() const { return id_; }
unsigned int GetHitLineCount() const { return line_ticks_.occupancy(); }
bool GetLineTicks(v8::CpuProfileNode::LineTick* entries,
unsigned int length) const;
void Print(int indent);
static bool CodeEntriesMatch(void* entry1, void* entry2) {
return reinterpret_cast<CodeEntry*>(entry1)->IsSameAs(
static uint32_t CodeEntryHash(CodeEntry* entry) {
return entry->GetCallUid();
static bool LineTickMatch(void* a, void* b) { return a == b; }
ProfileTree* tree_;
CodeEntry* entry_;
unsigned self_ticks_;
// Mapping from CodeEntry* to ProfileNode*
HashMap children_;
List<ProfileNode*> children_list_;
unsigned id_;
HashMap line_ticks_;
class ProfileTree {
ProfileNode* AddPathFromEnd(
const Vector<CodeEntry*>& path,
int src_line = v8::CpuProfileNode::kNoLineNumberInfo);
void AddPathFromStart(const Vector<CodeEntry*>& path,
int src_line = v8::CpuProfileNode::kNoLineNumberInfo);
ProfileNode* root() const { return root_; }
unsigned next_node_id() { return next_node_id_++; }
void Print() {
template <typename Callback>
void TraverseDepthFirst(Callback* callback);
CodeEntry root_entry_;
unsigned next_node_id_;
ProfileNode* root_;
class CpuProfile {
CpuProfile(const char* title, bool record_samples);
// Add pc -> ... -> main() call path to the profile.
void AddPath(base::TimeTicks timestamp, const Vector<CodeEntry*>& path,
int src_line);
void CalculateTotalTicksAndSamplingRate();
const char* title() const { return title_; }
const ProfileTree* top_down() const { return &top_down_; }
int samples_count() const { return samples_.length(); }
ProfileNode* sample(int index) const { return; }
base::TimeTicks sample_timestamp(int index) const {
base::TimeTicks start_time() const { return start_time_; }
base::TimeTicks end_time() const { return end_time_; }
void UpdateTicksScale();
void Print();
const char* title_;
bool record_samples_;
base::TimeTicks start_time_;
base::TimeTicks end_time_;
List<ProfileNode*> samples_;
List<base::TimeTicks> timestamps_;
ProfileTree top_down_;
class CodeMap {
CodeMap() : next_shared_id_(1) { }
void AddCode(Address addr, CodeEntry* entry, unsigned size);
void MoveCode(Address from, Address to);
CodeEntry* FindEntry(Address addr, Address* start = NULL);
int GetSharedId(Address addr);
void Print();
struct CodeEntryInfo {
CodeEntryInfo(CodeEntry* an_entry, unsigned a_size)
: entry(an_entry), size(a_size) { }
CodeEntry* entry;
unsigned size;
struct CodeTreeConfig {
typedef Address Key;
typedef CodeEntryInfo Value;
static const Key kNoKey;
static const Value NoValue() { return CodeEntryInfo(NULL, 0); }
static int Compare(const Key& a, const Key& b) {
return a < b ? -1 : (a > b ? 1 : 0);
typedef SplayTree<CodeTreeConfig> CodeTree;
class CodeTreePrinter {
void Call(const Address& key, const CodeEntryInfo& value);
void DeleteAllCoveredCode(Address start, Address end);
// Fake CodeEntry pointer to distinguish shared function entries.
static CodeEntry* const kSharedFunctionCodeEntry;
CodeTree tree_;
int next_shared_id_;
class CpuProfilesCollection {
explicit CpuProfilesCollection(Heap* heap);
bool StartProfiling(const char* title, bool record_samples);
CpuProfile* StopProfiling(const char* title);
List<CpuProfile*>* profiles() { return &finished_profiles_; }
const char* GetName(Name* name) {
return function_and_resource_names_.GetName(name);
const char* GetName(int args_count) {
return function_and_resource_names_.GetName(args_count);
const char* GetFunctionName(Name* name) {
return function_and_resource_names_.GetFunctionName(name);
const char* GetFunctionName(const char* name) {
return function_and_resource_names_.GetFunctionName(name);
bool IsLastProfile(const char* title);
void RemoveProfile(CpuProfile* profile);
CodeEntry* NewCodeEntry(
Logger::LogEventsAndTags tag, const char* name,
const char* name_prefix = CodeEntry::kEmptyNamePrefix,
const char* resource_name = CodeEntry::kEmptyResourceName,
int line_number = v8::CpuProfileNode::kNoLineNumberInfo,
int column_number = v8::CpuProfileNode::kNoColumnNumberInfo,
JITLineInfoTable* line_info = NULL, Address instruction_start = NULL);
// Called from profile generator thread.
void AddPathToCurrentProfiles(base::TimeTicks timestamp,
const Vector<CodeEntry*>& path, int src_line);
// Limits the number of profiles that can be simultaneously collected.
static const int kMaxSimultaneousProfiles = 100;
StringsStorage function_and_resource_names_;
List<CodeEntry*> code_entries_;
List<CpuProfile*> finished_profiles_;
// Accessed by VM thread and profile generator thread.
List<CpuProfile*> current_profiles_;
base::Semaphore current_profiles_semaphore_;
class ProfileGenerator {
explicit ProfileGenerator(CpuProfilesCollection* profiles);
void RecordTickSample(const TickSample& sample);
CodeMap* code_map() { return &code_map_; }
static const char* const kProgramEntryName;
static const char* const kIdleEntryName;
static const char* const kGarbageCollectorEntryName;
// Used to represent frames for which we have no reliable way to
// detect function.
static const char* const kUnresolvedFunctionName;
CodeEntry* EntryForVMState(StateTag tag);
CpuProfilesCollection* profiles_;
CodeMap code_map_;
CodeEntry* program_entry_;
CodeEntry* idle_entry_;
CodeEntry* gc_entry_;
CodeEntry* unresolved_entry_;
} } // namespace v8::internal