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c9bcfe877b43391af4e470fec00ef036557a7fee
sdk/runtime/vm/compiler/method_recognizer.cc
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Samir Jindel cbd17b535f Re-land "[vm/precomp] Use @pragma("vm:exact-result-type") to specify method behavior." 
We need to block interrupts while evaluating pragmas to prevert reentrant class finalization.
Original revision is in patchset 0.

Change-Id: I872cec4eaf4ca85567c9657c458ed39c8b2e30de
Cq-Include-Trybots: luci.dart.try:vm-kernel-win-release-x64-try, vm-kernel-optcounter-threshold-linux-release-x64-try, vm-kernel-precomp-linux-debug-x64-try, vm-kernel-precomp-linux-release-simarm-try, vm-kernel-precomp-linux-release-simarm64-try, vm-kernel-precomp-linux-release-x64-try, vm-kernel-precomp-win-release-x64-try
Reviewed-on: https://dart-review.googlesource.com/73160
Commit-Queue: Samir Jindel <sjindel@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
2018-09-11 18:14:51 +00:00

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// 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/compiler/method_recognizer.h"
#include "vm/object.h"
#include "vm/symbols.h"
namespace dart {
MethodRecognizer::Kind MethodRecognizer::RecognizeKind(
const Function& function) {
return function.recognized_kind();
}
bool MethodRecognizer::AlwaysInline(const Function& function) {
return function.always_inline();
}
bool MethodRecognizer::PolymorphicTarget(const Function& function) {
return function.is_polymorphic_target();
}
intptr_t MethodRecognizer::NumArgsCheckedForStaticCall(
const Function& function) {
switch (RecognizeKind(function)) {
case MethodRecognizer::kDoubleFromInteger:
case MethodRecognizer::kMathMin:
case MethodRecognizer::kMathMax:
return 2;
default:
return 0;
}
}
intptr_t MethodRecognizer::ResultCid(const Function& function) {
// Use the 'vm:exact-result-type' annotation if available. This can only be
// used within the core library, see 'result_type_pragma.md', detail 1.2 for
// explanation.
Class& cls = Thread::Current()->ClassHandle();
Library& lib = Thread::Current()->LibraryHandle();
cls = function.Owner();
lib = cls.library();
const bool can_use_pragma =
function.kernel_offset() > 0 && lib.IsAnyCoreLibrary();
cls = Class::null();
if (can_use_pragma) {
Isolate* I = Isolate::Current();
auto& option = Object::Handle();
if (function.FindPragma(I, Symbols::vm_exact_result_type(), &option)) {
if (option.IsType()) {
return Type::Cast(option).type_class_id();
} else if (option.IsString()) {
auto& str = String::Cast(option);
// 'str' should match the pattern '([^#]+)#([^#\?]+)' where group 1
// is the library URI and group 2 is the class name.
bool parse_failure = false;
intptr_t library_end = -1;
for (intptr_t i = 0; i < str.Length(); ++i) {
if (str.CharAt(i) == '#') {
if (library_end != -1) {
parse_failure = true;
break;
} else {
library_end = i;
}
}
}
if (!parse_failure && library_end > 0) {
auto& libraryUri = String::Handle(
String::SubString(str, 0, library_end, Heap::kOld));
auto& className = String::Handle(
String::SubString(str, library_end + 1,
str.Length() - library_end - 1, Heap::kOld));
Library& lib = Library::Handle(
Library::LookupLibrary(Thread::Current(), libraryUri));
if (!lib.IsNull()) {
Class& klass =
Class::Handle(lib.LookupClassAllowPrivate(className));
if (!klass.IsNull()) {
return klass.id();
}
}
}
}
}
}
// No result-type annotation can be used, so fall back on the table of
// recognized methods.
switch (function.recognized_kind()) {
#define DEFINE_CASE(cname, fname, ename, result_type, fingerprint) \
case k##ename: { \
const intptr_t cid = k##result_type##Cid; \
if (FLAG_strong && cid != kDynamicCid) { \
String& err = String::Handle(); \
err = function.QualifiedScrubbedName(); \
err = String::Concat( \
err, \
String::Handle(String::New(" (MethodRecognizer::k" #ename \
") should be using pragma annotation" \
" rather than method recognizer.", \
Heap::kOld)), \
Heap::kOld); \
FATAL(err.ToCString()); \
} \
return cid; \
}
RECOGNIZED_LIST(DEFINE_CASE)
#undef DEFINE_CASE
default:
return kDynamicCid;
}
}
intptr_t MethodRecognizer::MethodKindToReceiverCid(Kind kind) {
switch (kind) {
case kImmutableArrayGetIndexed:
return kImmutableArrayCid;
case kObjectArrayGetIndexed:
case kObjectArraySetIndexed:
case kObjectArraySetIndexedUnchecked:
return kArrayCid;
case kGrowableArrayGetIndexed:
case kGrowableArraySetIndexed:
case kGrowableArraySetIndexedUnchecked:
return kGrowableObjectArrayCid;
case kFloat32ArrayGetIndexed:
case kFloat32ArraySetIndexed:
return kTypedDataFloat32ArrayCid;
case kFloat64ArrayGetIndexed:
case kFloat64ArraySetIndexed:
return kTypedDataFloat64ArrayCid;
case kInt8ArrayGetIndexed:
case kInt8ArraySetIndexed:
return kTypedDataInt8ArrayCid;
case kUint8ArrayGetIndexed:
case kUint8ArraySetIndexed:
return kTypedDataUint8ArrayCid;
case kUint8ClampedArrayGetIndexed:
case kUint8ClampedArraySetIndexed:
return kTypedDataUint8ClampedArrayCid;
case kExternalUint8ArrayGetIndexed:
case kExternalUint8ArraySetIndexed:
return kExternalTypedDataUint8ArrayCid;
case kExternalUint8ClampedArrayGetIndexed:
case kExternalUint8ClampedArraySetIndexed:
return kExternalTypedDataUint8ClampedArrayCid;
case kInt16ArrayGetIndexed:
case kInt16ArraySetIndexed:
return kTypedDataInt16ArrayCid;
case kUint16ArrayGetIndexed:
case kUint16ArraySetIndexed:
return kTypedDataUint16ArrayCid;
case kInt32ArrayGetIndexed:
case kInt32ArraySetIndexed:
return kTypedDataInt32ArrayCid;
case kUint32ArrayGetIndexed:
case kUint32ArraySetIndexed:
return kTypedDataUint32ArrayCid;
case kInt64ArrayGetIndexed:
case kInt64ArraySetIndexed:
return kTypedDataInt64ArrayCid;
case kUint64ArrayGetIndexed:
case kUint64ArraySetIndexed:
return kTypedDataUint64ArrayCid;
case kFloat32x4ArrayGetIndexed:
case kFloat32x4ArraySetIndexed:
return kTypedDataFloat32x4ArrayCid;
case kInt32x4ArrayGetIndexed:
case kInt32x4ArraySetIndexed:
return kTypedDataInt32x4ArrayCid;
case kFloat64x2ArrayGetIndexed:
case kFloat64x2ArraySetIndexed:
return kTypedDataFloat64x2ArrayCid;
default:
break;
}
UNREACHABLE();
return kIllegalCid;
}
#define KIND_TO_STRING(class_name, function_name, enum_name, type, fp) \
#enum_name,
static const char* recognized_list_method_name[] = {
"Unknown", RECOGNIZED_LIST(KIND_TO_STRING)};
#undef KIND_TO_STRING
const char* MethodRecognizer::KindToCString(Kind kind) {
if (kind > kUnknown && kind < kNumRecognizedMethods)
return recognized_list_method_name[kind];
return "?";
}
#if !defined(DART_PRECOMPILED_RUNTIME)
void MethodRecognizer::InitializeState() {
GrowableArray<Library*> libs(3);
Libraries(&libs);
Function& func = Function::Handle();
#define SET_RECOGNIZED_KIND(class_name, function_name, enum_name, type, fp) \
func = Library::GetFunction(libs, #class_name, #function_name); \
if (!func.IsNull()) { \
CHECK_FINGERPRINT3(func, class_name, function_name, enum_name, fp); \
func.set_recognized_kind(k##enum_name); \
} else if (!FLAG_precompiled_mode) { \
OS::PrintErr("Missing %s::%s\n", #class_name, #function_name); \
UNREACHABLE(); \
}
RECOGNIZED_LIST(SET_RECOGNIZED_KIND);
#define SET_FUNCTION_BIT(class_name, function_name, dest, fp, setter, value) \
func = Library::GetFunction(libs, #class_name, #function_name); \
if (!func.IsNull()) { \
CHECK_FINGERPRINT3(func, class_name, function_name, dest, fp); \
func.setter(value); \
} else if (!FLAG_precompiled_mode) { \
OS::PrintErr("Missing %s::%s\n", #class_name, #function_name); \
UNREACHABLE(); \
}
#define SET_IS_ALWAYS_INLINE(class_name, function_name, dest, fp) \
SET_FUNCTION_BIT(class_name, function_name, dest, fp, set_always_inline, true)
#define SET_IS_NEVER_INLINE(class_name, function_name, dest, fp) \
SET_FUNCTION_BIT(class_name, function_name, dest, fp, set_is_inlinable, false)
#define SET_IS_POLYMORPHIC_TARGET(class_name, function_name, dest, fp) \
SET_FUNCTION_BIT(class_name, function_name, dest, fp, \
set_is_polymorphic_target, true)
INLINE_WHITE_LIST(SET_IS_ALWAYS_INLINE);
INLINE_BLACK_LIST(SET_IS_NEVER_INLINE);
POLYMORPHIC_TARGET_LIST(SET_IS_POLYMORPHIC_TARGET);
#undef SET_RECOGNIZED_KIND
#undef SET_IS_ALWAYS_INLINE
#undef SET_IS_POLYMORPHIC_TARGET
#undef SET_FUNCTION_BIT
}
void MethodRecognizer::Libraries(GrowableArray<Library*>* libs) {
libs->Add(&Library::ZoneHandle(Library::CoreLibrary()));
libs->Add(&Library::ZoneHandle(Library::CollectionLibrary()));
libs->Add(&Library::ZoneHandle(Library::MathLibrary()));
libs->Add(&Library::ZoneHandle(Library::TypedDataLibrary()));
libs->Add(&Library::ZoneHandle(Library::InternalLibrary()));
libs->Add(&Library::ZoneHandle(Library::DeveloperLibrary()));
libs->Add(&Library::ZoneHandle(Library::AsyncLibrary()));
}
RawGrowableObjectArray* MethodRecognizer::QueryRecognizedMethods(Zone* zone) {
const GrowableObjectArray& methods =
GrowableObjectArray::Handle(zone, GrowableObjectArray::New());
Function& func = Function::Handle(zone);
GrowableArray<Library*> libs(3);
Libraries(&libs);
#define ADD_RECOGNIZED_METHOD(class_name, function_name, enum_name, type, fp) \
func = Library::GetFunction(libs, #class_name, #function_name); \
methods.Add(func);
RECOGNIZED_LIST(ADD_RECOGNIZED_METHOD);
#undef ADD_RECOGNIZED_METHOD
return methods.raw();
}
#endif // !defined(DART_PRECOMPILED_RUNTIME)
Token::Kind MethodTokenRecognizer::RecognizeTokenKind(const String& name) {
ASSERT(name.IsSymbol());
if (name.raw() == Symbols::Plus().raw()) {
return Token::kADD;
} else if (name.raw() == Symbols::Minus().raw()) {
return Token::kSUB;
} else if (name.raw() == Symbols::Star().raw()) {
return Token::kMUL;
} else if (name.raw() == Symbols::Slash().raw()) {
return Token::kDIV;
} else if (name.raw() == Symbols::TruncDivOperator().raw()) {
return Token::kTRUNCDIV;
} else if (name.raw() == Symbols::Percent().raw()) {
return Token::kMOD;
} else if (name.raw() == Symbols::BitOr().raw()) {
return Token::kBIT_OR;
} else if (name.raw() == Symbols::Ampersand().raw()) {
return Token::kBIT_AND;
} else if (name.raw() == Symbols::Caret().raw()) {
return Token::kBIT_XOR;
} else if (name.raw() == Symbols::LeftShiftOperator().raw()) {
return Token::kSHL;
} else if (name.raw() == Symbols::RightShiftOperator().raw()) {
return Token::kSHR;
} else if (name.raw() == Symbols::Tilde().raw()) {
return Token::kBIT_NOT;
} else if (name.raw() == Symbols::UnaryMinus().raw()) {
return Token::kNEGATE;
} else if (name.raw() == Symbols::EqualOperator().raw()) {
return Token::kEQ;
} else if (name.raw() == Symbols::Token(Token::kNE).raw()) {
return Token::kNE;
} else if (name.raw() == Symbols::LAngleBracket().raw()) {
return Token::kLT;
} else if (name.raw() == Symbols::RAngleBracket().raw()) {
return Token::kGT;
} else if (name.raw() == Symbols::LessEqualOperator().raw()) {
return Token::kLTE;
} else if (name.raw() == Symbols::GreaterEqualOperator().raw()) {
return Token::kGTE;
} else if (Field::IsGetterName(name)) {
return Token::kGET;
} else if (Field::IsSetterName(name)) {
return Token::kSET;
}
return Token::kILLEGAL;
}
} // namespace dart
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