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// Copyright 2016 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 "src/profiler/profiler-listener.h"
#include "src/deoptimizer.h"
#include "src/objects-inl.h"
#include "src/profiler/cpu-profiler.h"
#include "src/profiler/profile-generator-inl.h"
#include "src/reloc-info.h"
#include "src/snapshot/embedded-data.h"
#include "src/source-position-table.h"
#include "src/wasm/wasm-code-manager.h"
namespace v8 {
namespace internal {
ProfilerListener::ProfilerListener(Isolate* isolate,
CodeEventObserver* observer)
: isolate_(isolate), observer_(observer) {}
ProfilerListener::~ProfilerListener() = default;
void ProfilerListener::CallbackEvent(Name name, Address entry_point) {
CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION);
CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_;
rec->instruction_start = entry_point;
rec->entry = new CodeEntry(CodeEventListener::CALLBACK_TAG, GetName(name));
rec->instruction_size = 1;
DispatchCodeEvent(evt_rec);
}
void ProfilerListener::CodeCreateEvent(CodeEventListener::LogEventsAndTags tag,
AbstractCode code, const char* name) {
CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION);
CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_;
rec->instruction_start = code->InstructionStart();
rec->entry = new CodeEntry(tag, GetName(name), CodeEntry::kEmptyResourceName,
CpuProfileNode::kNoLineNumberInfo,
CpuProfileNode::kNoColumnNumberInfo, nullptr,
code->InstructionStart());
rec->instruction_size = code->InstructionSize();
DispatchCodeEvent(evt_rec);
}
void ProfilerListener::CodeCreateEvent(CodeEventListener::LogEventsAndTags tag,
AbstractCode code, Name name) {
CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION);
CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_;
rec->instruction_start = code->InstructionStart();
rec->entry = new CodeEntry(tag, GetName(name), CodeEntry::kEmptyResourceName,
CpuProfileNode::kNoLineNumberInfo,
CpuProfileNode::kNoColumnNumberInfo, nullptr,
code->InstructionStart());
rec->instruction_size = code->InstructionSize();
DispatchCodeEvent(evt_rec);
}
void ProfilerListener::CodeCreateEvent(CodeEventListener::LogEventsAndTags tag,
AbstractCode code,
SharedFunctionInfo shared,
Name script_name) {
CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION);
CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_;
rec->instruction_start = code->InstructionStart();
rec->entry = new CodeEntry(tag, GetName(shared->DebugName()),
GetName(InferScriptName(script_name, shared)),
CpuProfileNode::kNoLineNumberInfo,
CpuProfileNode::kNoColumnNumberInfo, nullptr,
code->InstructionStart());
DCHECK(!code->IsCode());
rec->entry->FillFunctionInfo(shared);
rec->instruction_size = code->InstructionSize();
DispatchCodeEvent(evt_rec);
}
namespace {
CodeEntry* GetOrInsertCachedEntry(
std::unordered_set<std::unique_ptr<CodeEntry>, CodeEntry::Hasher,
CodeEntry::Equals>* entries,
std::unique_ptr<CodeEntry> search_value) {
auto it = entries->find(search_value);
if (it != entries->end()) return it->get();
CodeEntry* ret = search_value.get();
entries->insert(std::move(search_value));
return ret;
}
} // namespace
void ProfilerListener::CodeCreateEvent(CodeEventListener::LogEventsAndTags tag,
AbstractCode abstract_code,
SharedFunctionInfo shared,
Name script_name, int line, int column) {
CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION);
CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_;
rec->instruction_start = abstract_code->InstructionStart();
std::unique_ptr<SourcePositionTable> line_table;
std::unordered_map<int, std::vector<CodeEntryAndLineNumber>> inline_stacks;
std::unordered_set<std::unique_ptr<CodeEntry>, CodeEntry::Hasher,
CodeEntry::Equals>
cached_inline_entries;
bool is_shared_cross_origin = false;
if (shared->script()->IsScript()) {
Script script = Script::cast(shared->script());
line_table.reset(new SourcePositionTable());
HandleScope scope(isolate_);
is_shared_cross_origin = script.origin_options().IsSharedCrossOrigin();
// Add each position to the source position table and store inlining stacks
// for inline positions. We store almost the same information in the
// profiler as is stored on the code object, except that we transform source
// positions to line numbers here, because we only care about attributing
// ticks to a given line.
for (SourcePositionTableIterator it(abstract_code->source_position_table());
!it.done(); it.Advance()) {
int position = it.source_position().ScriptOffset();
int line_number = script->GetLineNumber(position) + 1;
int inlining_id = it.source_position().InliningId();
line_table->SetPosition(it.code_offset(), line_number, inlining_id);
if (inlining_id != SourcePosition::kNotInlined) {
DCHECK(abstract_code->IsCode());
Code code = abstract_code->GetCode();
std::vector<SourcePositionInfo> stack =
it.source_position().InliningStack(handle(code, isolate_));
DCHECK(!stack.empty());
std::vector<CodeEntryAndLineNumber> inline_stack;
for (SourcePositionInfo& pos_info : stack) {
if (pos_info.position.ScriptOffset() == kNoSourcePosition) continue;
if (pos_info.script.is_null()) continue;
int line_number =
pos_info.script->GetLineNumber(pos_info.position.ScriptOffset()) +
1;
const char* resource_name =
(pos_info.script->name()->IsName())
? GetName(Name::cast(pos_info.script->name()))
: CodeEntry::kEmptyResourceName;
bool inline_is_shared_cross_origin =
pos_info.script->origin_options().IsSharedCrossOrigin();
// We need the start line number and column number of the function for
// kLeafNodeLineNumbers mode. Creating a SourcePositionInfo is a handy
// way of getting both easily.
SourcePositionInfo start_pos_info(
SourcePosition(pos_info.shared->StartPosition()),
pos_info.shared);
std::unique_ptr<CodeEntry> inline_entry =
base::make_unique<CodeEntry>(
tag, GetName(pos_info.shared->DebugName()), resource_name,
start_pos_info.line + 1, start_pos_info.column + 1, nullptr,
code->InstructionStart(), inline_is_shared_cross_origin);
inline_entry->FillFunctionInfo(*pos_info.shared);
// Create a canonical CodeEntry for each inlined frame and then re-use
// them for subsequent inline stacks to avoid a lot of duplication.
CodeEntry* cached_entry = GetOrInsertCachedEntry(
&cached_inline_entries, std::move(inline_entry));
inline_stack.push_back(
CodeEntryAndLineNumber{cached_entry, line_number});
}
DCHECK(!inline_stack.empty());
inline_stacks.emplace(inlining_id, std::move(inline_stack));
}
}
}
rec->entry =
new CodeEntry(tag, GetName(shared->DebugName()),
GetName(InferScriptName(script_name, shared)), line, column,
std::move(line_table), abstract_code->InstructionStart(),
is_shared_cross_origin);
if (!inline_stacks.empty()) {
rec->entry->SetInlineStacks(std::move(cached_inline_entries),
std::move(inline_stacks));
}
rec->entry->FillFunctionInfo(shared);
rec->instruction_size = abstract_code->InstructionSize();
DispatchCodeEvent(evt_rec);
}
void ProfilerListener::CodeCreateEvent(CodeEventListener::LogEventsAndTags tag,
const wasm::WasmCode* code,
wasm::WasmName name) {
CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION);
CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_;
rec->instruction_start = code->instruction_start();
rec->entry = new CodeEntry(
tag, GetName(name.start()), CodeEntry::kWasmResourceNamePrefix,
CpuProfileNode::kNoLineNumberInfo, CpuProfileNode::kNoColumnNumberInfo,
nullptr, code->instruction_start(), true);
rec->instruction_size = code->instructions().length();
DispatchCodeEvent(evt_rec);
}
void ProfilerListener::CodeMoveEvent(AbstractCode from, AbstractCode to) {
CodeEventsContainer evt_rec(CodeEventRecord::CODE_MOVE);
CodeMoveEventRecord* rec = &evt_rec.CodeMoveEventRecord_;
rec->from_instruction_start = from->InstructionStart();
rec->to_instruction_start = to->InstructionStart();
DispatchCodeEvent(evt_rec);
}
void ProfilerListener::CodeDisableOptEvent(AbstractCode code,
SharedFunctionInfo shared) {
CodeEventsContainer evt_rec(CodeEventRecord::CODE_DISABLE_OPT);
CodeDisableOptEventRecord* rec = &evt_rec.CodeDisableOptEventRecord_;
rec->instruction_start = code->InstructionStart();
rec->bailout_reason = GetBailoutReason(shared->disable_optimization_reason());
DispatchCodeEvent(evt_rec);
}
void ProfilerListener::CodeDeoptEvent(Code code, DeoptimizeKind kind,
Address pc, int fp_to_sp_delta) {
CodeEventsContainer evt_rec(CodeEventRecord::CODE_DEOPT);
CodeDeoptEventRecord* rec = &evt_rec.CodeDeoptEventRecord_;
Deoptimizer::DeoptInfo info = Deoptimizer::GetDeoptInfo(code, pc);
rec->instruction_start = code->InstructionStart();
rec->deopt_reason = DeoptimizeReasonToString(info.deopt_reason);
rec->deopt_id = info.deopt_id;
rec->pc = pc;
rec->fp_to_sp_delta = fp_to_sp_delta;
// When a function is deoptimized, we store the deoptimized frame information
// for the use of GetDeoptInfos().
AttachDeoptInlinedFrames(code, rec);
DispatchCodeEvent(evt_rec);
}
void ProfilerListener::GetterCallbackEvent(Name name, Address entry_point) {
CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION);
CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_;
rec->instruction_start = entry_point;
rec->entry =
new CodeEntry(CodeEventListener::CALLBACK_TAG, GetConsName("get ", name));
rec->instruction_size = 1;
DispatchCodeEvent(evt_rec);
}
void ProfilerListener::RegExpCodeCreateEvent(AbstractCode code, String source) {
CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION);
CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_;
rec->instruction_start = code->InstructionStart();
rec->entry = new CodeEntry(
CodeEventListener::REG_EXP_TAG, GetConsName("RegExp: ", source),
CodeEntry::kEmptyResourceName, CpuProfileNode::kNoLineNumberInfo,
CpuProfileNode::kNoColumnNumberInfo, nullptr, code->InstructionStart());
rec->instruction_size = code->InstructionSize();
DispatchCodeEvent(evt_rec);
}
void ProfilerListener::SetterCallbackEvent(Name name, Address entry_point) {
CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION);
CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_;
rec->instruction_start = entry_point;
rec->entry =
new CodeEntry(CodeEventListener::CALLBACK_TAG, GetConsName("set ", name));
rec->instruction_size = 1;
DispatchCodeEvent(evt_rec);
}
Name ProfilerListener::InferScriptName(Name name, SharedFunctionInfo info) {
if (name->IsString() && String::cast(name)->length()) return name;
if (!info->script()->IsScript()) return name;
Object source_url = Script::cast(info->script())->source_url();
return source_url->IsName() ? Name::cast(source_url) : name;
}
void ProfilerListener::AttachDeoptInlinedFrames(Code code,
CodeDeoptEventRecord* rec) {
int deopt_id = rec->deopt_id;
SourcePosition last_position = SourcePosition::Unknown();
int mask = RelocInfo::ModeMask(RelocInfo::DEOPT_ID) |
RelocInfo::ModeMask(RelocInfo::DEOPT_SCRIPT_OFFSET) |
RelocInfo::ModeMask(RelocInfo::DEOPT_INLINING_ID);
rec->deopt_frames = nullptr;
rec->deopt_frame_count = 0;
for (RelocIterator it(code, mask); !it.done(); it.next()) {
RelocInfo* info = it.rinfo();
if (info->rmode() == RelocInfo::DEOPT_SCRIPT_OFFSET) {
int script_offset = static_cast<int>(info->data());
it.next();
DCHECK(it.rinfo()->rmode() == RelocInfo::DEOPT_INLINING_ID);
int inlining_id = static_cast<int>(it.rinfo()->data());
last_position = SourcePosition(script_offset, inlining_id);
continue;
}
if (info->rmode() == RelocInfo::DEOPT_ID) {
if (deopt_id != static_cast<int>(info->data())) continue;
DCHECK(last_position.IsKnown());
// SourcePosition::InliningStack allocates a handle for the SFI of each
// frame. These don't escape this function, but quickly add up. This
// scope limits their lifetime.
HandleScope scope(isolate_);
std::vector<SourcePositionInfo> stack =
last_position.InliningStack(handle(code, isolate_));
CpuProfileDeoptFrame* deopt_frames =
new CpuProfileDeoptFrame[stack.size()];
int deopt_frame_count = 0;
for (SourcePositionInfo& pos_info : stack) {
if (pos_info.position.ScriptOffset() == kNoSourcePosition) continue;
if (pos_info.script.is_null()) continue;
int script_id = pos_info.script->id();
size_t offset = static_cast<size_t>(pos_info.position.ScriptOffset());
deopt_frames[deopt_frame_count++] = {script_id, offset};
}
rec->deopt_frames = deopt_frames;
rec->deopt_frame_count = deopt_frame_count;
break;
}
}
}
} // namespace internal
} // namespace v8