blob: 27e6dbb9dabcf1e418876d2e9dbe0b49a84deb0a [file] [log] [blame]
// 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/compilation-info.h"
#include "src/api.h"
#include "src/ast/ast.h"
#include "src/ast/scopes.h"
#include "src/debug/debug.h"
#include "src/isolate.h"
#include "src/objects-inl.h"
#include "src/parsing/parse-info.h"
#include "src/source-position.h"
namespace v8 {
namespace internal {
// TODO(mvstanton): the Code::OPTIMIZED_FUNCTION constant below is
// bogus, it's just that I've eliminated Code::FUNCTION and there isn't
// a "better" value to put in this place.
CompilationInfo::CompilationInfo(Zone* zone, ParseInfo* parse_info,
FunctionLiteral* literal)
: CompilationInfo({}, Code::OPTIMIZED_FUNCTION, BASE, zone) {
// NOTE: The parse_info passed here represents the global information gathered
// during parsing, but does not represent specific details of the actual
// function literal being compiled for this CompilationInfo. As such,
// parse_info->literal() might be different from literal, and only global
// details of the script being parsed are relevant to this CompilationInfo.
DCHECK_NOT_NULL(literal);
literal_ = literal;
source_range_map_ = parse_info->source_range_map();
if (parse_info->is_eval()) MarkAsEval();
if (parse_info->is_native()) MarkAsNative();
if (parse_info->collect_type_profile()) MarkAsCollectTypeProfile();
}
CompilationInfo::CompilationInfo(Zone* zone, Isolate* isolate,
Handle<SharedFunctionInfo> shared,
Handle<JSFunction> closure)
: CompilationInfo({}, Code::OPTIMIZED_FUNCTION, OPTIMIZE, zone) {
shared_info_ = shared;
closure_ = closure;
optimization_id_ = isolate->NextOptimizationId();
dependencies_.reset(new CompilationDependencies(isolate, zone));
if (FLAG_function_context_specialization) MarkAsFunctionContextSpecializing();
if (FLAG_turbo_splitting) MarkAsSplittingEnabled();
// Collect source positions for optimized code when profiling or if debugger
// is active, to be able to get more precise source positions at the price of
// more memory consumption.
if (isolate->NeedsSourcePositionsForProfiling()) {
MarkAsSourcePositionsEnabled();
}
}
CompilationInfo::CompilationInfo(Vector<const char> debug_name, Zone* zone,
Code::Kind code_kind)
: CompilationInfo(debug_name, code_kind, STUB, zone) {}
CompilationInfo::CompilationInfo(Vector<const char> debug_name,
Code::Kind code_kind, Mode mode, Zone* zone)
: literal_(nullptr),
source_range_map_(nullptr),
flags_(FLAG_untrusted_code_mitigations ? kUntrustedCodeMitigations : 0),
code_kind_(code_kind),
stub_key_(0),
builtin_index_(Builtins::kNoBuiltinId),
mode_(mode),
osr_offset_(BailoutId::None()),
feedback_vector_spec_(zone),
zone_(zone),
deferred_handles_(nullptr),
dependencies_(nullptr),
bailout_reason_(BailoutReason::kNoReason),
parameter_count_(0),
optimization_id_(-1),
debug_name_(debug_name) {}
CompilationInfo::~CompilationInfo() {
if (GetFlag(kDisableFutureOptimization) && has_shared_info()) {
shared_info()->DisableOptimization(bailout_reason());
}
if (dependencies()) {
dependencies()->Rollback();
}
}
DeclarationScope* CompilationInfo::scope() const {
DCHECK_NOT_NULL(literal_);
return literal_->scope();
}
int CompilationInfo::num_parameters() const {
return !IsStub() ? scope()->num_parameters() : parameter_count_;
}
int CompilationInfo::num_parameters_including_this() const {
return num_parameters() + (is_this_defined() ? 1 : 0);
}
bool CompilationInfo::is_this_defined() const { return !IsStub(); }
void CompilationInfo::set_deferred_handles(
std::shared_ptr<DeferredHandles> deferred_handles) {
DCHECK_NULL(deferred_handles_);
deferred_handles_.swap(deferred_handles);
}
void CompilationInfo::set_deferred_handles(DeferredHandles* deferred_handles) {
DCHECK_NULL(deferred_handles_);
deferred_handles_.reset(deferred_handles);
}
void CompilationInfo::ReopenHandlesInNewHandleScope() {
if (!shared_info_.is_null()) {
shared_info_ = Handle<SharedFunctionInfo>(*shared_info_);
}
if (!closure_.is_null()) {
closure_ = Handle<JSFunction>(*closure_);
}
}
bool CompilationInfo::has_simple_parameters() {
return scope()->has_simple_parameters();
}
std::unique_ptr<char[]> CompilationInfo::GetDebugName() const {
if (literal()) {
return literal()->GetDebugName();
}
if (!shared_info().is_null()) {
return shared_info()->DebugName()->ToCString();
}
Vector<const char> name_vec = debug_name_;
if (name_vec.is_empty()) name_vec = ArrayVector("unknown");
std::unique_ptr<char[]> name(new char[name_vec.length() + 1]);
memcpy(name.get(), name_vec.start(), name_vec.length());
name[name_vec.length()] = '\0';
return name;
}
StackFrame::Type CompilationInfo::GetOutputStackFrameType() const {
switch (code_kind()) {
case Code::STUB:
case Code::BYTECODE_HANDLER:
case Code::BUILTIN:
return StackFrame::STUB;
case Code::WASM_FUNCTION:
return StackFrame::WASM_COMPILED;
case Code::JS_TO_WASM_FUNCTION:
return StackFrame::JS_TO_WASM;
case Code::WASM_TO_WASM_FUNCTION:
return StackFrame::WASM_TO_WASM;
case Code::WASM_TO_JS_FUNCTION:
return StackFrame::WASM_TO_JS;
case Code::WASM_INTERPRETER_ENTRY:
return StackFrame::WASM_INTERPRETER_ENTRY;
default:
UNIMPLEMENTED();
return StackFrame::NONE;
}
}
int CompilationInfo::GetDeclareGlobalsFlags() const {
return DeclareGlobalsEvalFlag::encode(is_eval()) |
DeclareGlobalsNativeFlag::encode(is_native());
}
SourcePositionTableBuilder::RecordingMode
CompilationInfo::SourcePositionRecordingMode() const {
return is_native() ? SourcePositionTableBuilder::OMIT_SOURCE_POSITIONS
: SourcePositionTableBuilder::RECORD_SOURCE_POSITIONS;
}
bool CompilationInfo::has_context() const { return !closure().is_null(); }
Context* CompilationInfo::context() const {
return has_context() ? closure()->context() : nullptr;
}
bool CompilationInfo::has_native_context() const {
return !closure().is_null() && (closure()->native_context() != nullptr);
}
Context* CompilationInfo::native_context() const {
return has_native_context() ? closure()->native_context() : nullptr;
}
bool CompilationInfo::has_global_object() const { return has_native_context(); }
JSGlobalObject* CompilationInfo::global_object() const {
return has_global_object() ? native_context()->global_object() : nullptr;
}
int CompilationInfo::AddInlinedFunction(
Handle<SharedFunctionInfo> inlined_function, SourcePosition pos) {
int id = static_cast<int>(inlined_functions_.size());
inlined_functions_.push_back(InlinedFunctionHolder(inlined_function, pos));
return id;
}
} // namespace internal
} // namespace v8