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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/optimized-compilation-info.h"
#include "src/api.h"
#include "src/debug/debug.h"
#include "src/isolate.h"
#include "src/objects-inl.h"
#include "src/objects/shared-function-info.h"
#include "src/source-position.h"
namespace v8 {
namespace internal {
OptimizedCompilationInfo::OptimizedCompilationInfo(
Zone* zone, Isolate* isolate, Handle<SharedFunctionInfo> shared,
Handle<JSFunction> closure)
: OptimizedCompilationInfo({}, AbstractCode::OPTIMIZED_FUNCTION, zone) {
shared_info_ = shared;
closure_ = closure;
optimization_id_ = isolate->NextOptimizationId();
SetFlag(kCalledWithCodeStartRegister);
if (FLAG_function_context_specialization) MarkAsFunctionContextSpecializing();
if (FLAG_turbo_splitting) MarkAsSplittingEnabled();
SetFlag(kSwitchJumpTableEnabled);
if (FLAG_untrusted_code_mitigations) MarkAsPoisoningRegisterArguments();
// TODO(yangguo): Disable this in case of debugging for crbug.com/826613
if (FLAG_analyze_environment_liveness) {
MarkAsAnalyzeEnvironmentLiveness();
}
// 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->NeedsDetailedOptimizedCodeLineInfo()) {
MarkAsSourcePositionsEnabled();
}
SetTracingFlags(shared->PassesFilter(FLAG_trace_turbo_filter));
}
OptimizedCompilationInfo::OptimizedCompilationInfo(
Vector<const char> debug_name, Zone* zone, Code::Kind code_kind)
: OptimizedCompilationInfo(
debug_name, static_cast<AbstractCode::Kind>(code_kind), zone) {
if (code_kind == Code::BYTECODE_HANDLER) {
SetFlag(OptimizedCompilationInfo::kCalledWithCodeStartRegister);
}
#if ENABLE_GDB_JIT_INTERFACE
#if DEBUG
if (code_kind == Code::BUILTIN || code_kind == Code::STUB) {
MarkAsSourcePositionsEnabled();
}
#endif
#endif
SetTracingFlags(
PassesFilter(debug_name, CStrVector(FLAG_trace_turbo_filter)));
// Embedded builtins don't support embedded absolute code addresses, so we
// cannot use jump tables.
if (code_kind != Code::BUILTIN) {
SetFlag(kSwitchJumpTableEnabled);
}
}
OptimizedCompilationInfo::OptimizedCompilationInfo(
Vector<const char> debug_name, AbstractCode::Kind code_kind, Zone* zone)
: flags_(FLAG_untrusted_code_mitigations ? kUntrustedCodeMitigations : 0),
code_kind_(code_kind),
stub_key_(0),
builtin_index_(Builtins::kNoBuiltinId),
osr_offset_(BailoutId::None()),
zone_(zone),
deferred_handles_(nullptr),
bailout_reason_(BailoutReason::kNoReason),
optimization_id_(-1),
debug_name_(debug_name) {}
OptimizedCompilationInfo::~OptimizedCompilationInfo() {
if (GetFlag(kDisableFutureOptimization) && has_shared_info()) {
shared_info()->DisableOptimization(bailout_reason());
}
}
void OptimizedCompilationInfo::set_deferred_handles(
std::shared_ptr<DeferredHandles> deferred_handles) {
DCHECK_NULL(deferred_handles_);
deferred_handles_.swap(deferred_handles);
}
void OptimizedCompilationInfo::set_deferred_handles(
DeferredHandles* deferred_handles) {
DCHECK_NULL(deferred_handles_);
deferred_handles_.reset(deferred_handles);
}
void OptimizedCompilationInfo::ReopenHandlesInNewHandleScope(Isolate* isolate) {
if (!shared_info_.is_null()) {
shared_info_ = Handle<SharedFunctionInfo>(*shared_info_, isolate);
}
if (!closure_.is_null()) {
closure_ = Handle<JSFunction>(*closure_, isolate);
}
}
std::unique_ptr<char[]> OptimizedCompilationInfo::GetDebugName() const {
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 OptimizedCompilationInfo::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_JS_FUNCTION:
return StackFrame::WASM_TO_JS;
case Code::WASM_INTERPRETER_ENTRY:
return StackFrame::WASM_INTERPRETER_ENTRY;
default:
UNIMPLEMENTED();
return StackFrame::NONE;
}
}
bool OptimizedCompilationInfo::has_context() const {
return !closure().is_null();
}
Context* OptimizedCompilationInfo::context() const {
return has_context() ? closure()->context() : nullptr;
}
bool OptimizedCompilationInfo::has_native_context() const {
return !closure().is_null() && (closure()->native_context() != nullptr);
}
Context* OptimizedCompilationInfo::native_context() const {
return has_native_context() ? closure()->native_context() : nullptr;
}
bool OptimizedCompilationInfo::has_global_object() const {
return has_native_context();
}
JSGlobalObject* OptimizedCompilationInfo::global_object() const {
return has_global_object() ? native_context()->global_object() : nullptr;
}
int OptimizedCompilationInfo::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;
}
void OptimizedCompilationInfo::SetTracingFlags(bool passes_filter) {
if (!passes_filter) return;
if (FLAG_trace_turbo) SetFlag(kTraceTurboJson);
if (FLAG_trace_turbo_graph) SetFlag(kTraceTurboGraph);
if (FLAG_trace_turbo_scheduled) SetFlag(kTraceTurboScheduled);
}
} // namespace internal
} // namespace v8
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