mirror of
https://github.com/dart-lang/sdk
synced 2024-09-05 00:13:50 +00:00
![Martin Kustermann](/assets/img/avatar_default.png)
Issue https://dart-review.googlesource.com/c/sdk/+/115701 Change-Id: Ib579f0bbc8d694aec74afd837217316a10baf910 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/115707 Commit-Queue: Martin Kustermann <kustermann@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com> Reviewed-by: Daco Harkes <dacoharkes@google.com>
3131 lines
123 KiB
C++
3131 lines
123 KiB
C++
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/runtime_entry.h"
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#include "vm/code_patcher.h"
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#include "vm/compiler/assembler/assembler.h"
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#include "vm/compiler/frontend/bytecode_reader.h"
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#include "vm/compiler/jit/compiler.h"
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#include "vm/dart_api_impl.h"
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#include "vm/dart_entry.h"
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#include "vm/debugger.h"
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#include "vm/deopt_instructions.h"
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#include "vm/exceptions.h"
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#include "vm/flags.h"
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#include "vm/heap/verifier.h"
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#include "vm/instructions.h"
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#include "vm/interpreter.h"
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#include "vm/kernel_isolate.h"
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#include "vm/message.h"
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#include "vm/message_handler.h"
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#include "vm/object_store.h"
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#include "vm/parser.h"
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#include "vm/resolver.h"
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#include "vm/service_isolate.h"
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#include "vm/stack_frame.h"
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#include "vm/symbols.h"
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#include "vm/thread.h"
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#include "vm/thread_registry.h"
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#include "vm/type_testing_stubs.h"
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namespace dart {
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DEFINE_FLAG(
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int,
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max_subtype_cache_entries,
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100,
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"Maximum number of subtype cache entries (number of checks cached).");
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DEFINE_FLAG(
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int,
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regexp_optimization_counter_threshold,
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1000,
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"RegExp's usage-counter value before it is optimized, -1 means never");
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DEFINE_FLAG(int,
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reoptimization_counter_threshold,
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4000,
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"Counter threshold before a function gets reoptimized.");
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DEFINE_FLAG(bool, trace_deoptimization, false, "Trace deoptimization");
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DEFINE_FLAG(bool,
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trace_deoptimization_verbose,
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false,
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"Trace deoptimization verbose");
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DECLARE_FLAG(bool, enable_interpreter);
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DECLARE_FLAG(int, max_deoptimization_counter_threshold);
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DECLARE_FLAG(bool, trace_compiler);
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DECLARE_FLAG(bool, trace_optimizing_compiler);
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DECLARE_FLAG(int, max_polymorphic_checks);
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DEFINE_FLAG(bool, trace_osr, false, "Trace attempts at on-stack replacement.");
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DEFINE_FLAG(int, gc_every, 0, "Run major GC on every N stack overflow checks");
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DEFINE_FLAG(int,
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stacktrace_every,
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0,
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"Compute debugger stacktrace on every N stack overflow checks");
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DEFINE_FLAG(charp,
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stacktrace_filter,
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NULL,
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"Compute stacktrace in named function on stack overflow checks");
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DEFINE_FLAG(charp,
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deoptimize_filter,
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NULL,
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"Deoptimize in named function on stack overflow checks");
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DEFINE_FLAG(bool,
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unopt_monomorphic_calls,
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true,
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"Enable specializing monomorphic calls from unoptimized code.");
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DEFINE_FLAG(bool,
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unopt_megamorphic_calls,
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true,
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"Enable specializing megamorphic calls from unoptimized code.");
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DEFINE_FLAG(bool,
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verbose_stack_overflow,
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false,
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"Print additional details about stack overflow.");
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DECLARE_FLAG(int, reload_every);
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DECLARE_FLAG(bool, reload_every_optimized);
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DECLARE_FLAG(bool, reload_every_back_off);
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#if defined(TESTING) || defined(DEBUG)
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void VerifyOnTransition() {
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Thread* thread = Thread::Current();
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TransitionGeneratedToVM transition(thread);
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VerifyPointersVisitor::VerifyPointers();
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thread->isolate()->heap()->Verify();
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}
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#endif
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// Add function to a class and that class to the class dictionary so that
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// frame walking can be used.
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const Function& RegisterFakeFunction(const char* name, const Code& code) {
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Thread* thread = Thread::Current();
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const String& class_name = String::Handle(Symbols::New(thread, "ownerClass"));
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const Script& script = Script::Handle();
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const Library& lib = Library::Handle(Library::CoreLibrary());
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const Class& owner_class = Class::Handle(
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Class::New(lib, class_name, script, TokenPosition::kNoSource));
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const String& function_name = String::ZoneHandle(Symbols::New(thread, name));
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const Function& function = Function::ZoneHandle(Function::New(
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function_name, RawFunction::kRegularFunction, true, false, false, false,
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false, owner_class, TokenPosition::kMinSource));
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const Array& functions = Array::Handle(Array::New(1));
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functions.SetAt(0, function);
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owner_class.SetFunctions(functions);
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lib.AddClass(owner_class);
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function.AttachCode(code);
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return function;
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}
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DEFINE_RUNTIME_ENTRY(RangeError, 2) {
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const Instance& length = Instance::CheckedHandle(zone, arguments.ArgAt(0));
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const Instance& index = Instance::CheckedHandle(zone, arguments.ArgAt(1));
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if (!length.IsInteger()) {
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// Throw: new ArgumentError.value(length, "length", "is not an integer");
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const Array& args = Array::Handle(zone, Array::New(3));
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args.SetAt(0, length);
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args.SetAt(1, Symbols::Length());
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args.SetAt(2, String::Handle(zone, String::New("is not an integer")));
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Exceptions::ThrowByType(Exceptions::kArgumentValue, args);
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}
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if (!index.IsInteger()) {
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// Throw: new ArgumentError.value(index, "index", "is not an integer");
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const Array& args = Array::Handle(zone, Array::New(3));
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args.SetAt(0, index);
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args.SetAt(1, Symbols::Index());
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args.SetAt(2, String::Handle(zone, String::New("is not an integer")));
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Exceptions::ThrowByType(Exceptions::kArgumentValue, args);
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}
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// Throw: new RangeError.range(index, 0, length - 1, "length");
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const Array& args = Array::Handle(zone, Array::New(4));
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args.SetAt(0, index);
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args.SetAt(1, Integer::Handle(zone, Integer::New(0)));
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args.SetAt(
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2, Integer::Handle(
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zone, Integer::Cast(length).ArithmeticOp(
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Token::kSUB, Integer::Handle(zone, Integer::New(1)))));
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args.SetAt(3, Symbols::Length());
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Exceptions::ThrowByType(Exceptions::kRange, args);
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}
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static void NullErrorHelper(Zone* zone, const String& selector) {
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InvocationMirror::Kind kind = InvocationMirror::kMethod;
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if (Field::IsGetterName(selector)) {
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kind = InvocationMirror::kGetter;
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} else if (Field::IsSetterName(selector)) {
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kind = InvocationMirror::kSetter;
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}
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const Smi& invocation_type = Smi::Handle(
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zone,
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Smi::New(InvocationMirror::EncodeType(InvocationMirror::kDynamic, kind)));
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const Array& args = Array::Handle(zone, Array::New(6));
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args.SetAt(0, /* instance */ Object::null_object());
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args.SetAt(1, selector);
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args.SetAt(2, invocation_type);
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args.SetAt(3, /* func_type_args */ Object::null_object());
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args.SetAt(4, /* func_args */ Object::null_object());
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args.SetAt(5, /* func_arg_names */ Object::null_object());
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Exceptions::ThrowByType(Exceptions::kNoSuchMethod, args);
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}
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DEFINE_RUNTIME_ENTRY(NullError, 0) {
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DartFrameIterator iterator(thread,
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StackFrameIterator::kNoCrossThreadIteration);
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const StackFrame* caller_frame = iterator.NextFrame();
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ASSERT(caller_frame->IsDartFrame());
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ASSERT(!caller_frame->is_interpreted());
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const Code& code = Code::Handle(zone, caller_frame->LookupDartCode());
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const uword pc_offset = caller_frame->pc() - code.PayloadStart();
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if (FLAG_shared_slow_path_triggers_gc) {
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isolate->heap()->CollectAllGarbage();
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}
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const CodeSourceMap& map =
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CodeSourceMap::Handle(zone, code.code_source_map());
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String& member_name = String::Handle(zone);
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if (!map.IsNull()) {
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CodeSourceMapReader reader(map, Array::null_array(),
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Function::null_function());
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const intptr_t name_index = reader.GetNullCheckNameIndexAt(pc_offset);
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RELEASE_ASSERT(name_index >= 0);
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const ObjectPool& pool = ObjectPool::Handle(zone, code.GetObjectPool());
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member_name ^= pool.ObjectAt(name_index);
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} else {
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member_name = Symbols::OptimizedOut().raw();
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}
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NullErrorHelper(zone, member_name);
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}
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DEFINE_RUNTIME_ENTRY(NullErrorWithSelector, 1) {
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const String& selector = String::CheckedHandle(zone, arguments.ArgAt(0));
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NullErrorHelper(zone, selector);
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}
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DEFINE_RUNTIME_ENTRY(ArgumentNullError, 0) {
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const String& error = String::Handle(String::New("argument value is null"));
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Exceptions::ThrowArgumentError(error);
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}
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DEFINE_RUNTIME_ENTRY(ArgumentError, 1) {
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const Instance& value = Instance::CheckedHandle(zone, arguments.ArgAt(0));
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Exceptions::ThrowArgumentError(value);
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}
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DEFINE_RUNTIME_ENTRY(ArgumentErrorUnboxedInt64, 0) {
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// Unboxed value is passed through a dedicated slot in Thread.
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int64_t unboxed_value = arguments.thread()->unboxed_int64_runtime_arg();
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const Integer& value = Integer::Handle(zone, Integer::New(unboxed_value));
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Exceptions::ThrowArgumentError(value);
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}
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DEFINE_RUNTIME_ENTRY(IntegerDivisionByZeroException, 0) {
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const Array& args = Array::Handle(zone, Array::New(0));
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Exceptions::ThrowByType(Exceptions::kIntegerDivisionByZeroException, args);
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}
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// Allocation of a fixed length array of given element type.
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// This runtime entry is never called for allocating a List of a generic type,
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// because a prior run time call instantiates the element type if necessary.
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// Arg0: array length.
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// Arg1: array type arguments, i.e. vector of 1 type, the element type.
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// Return value: newly allocated array of length arg0.
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DEFINE_RUNTIME_ENTRY(AllocateArray, 2) {
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const Instance& length = Instance::CheckedHandle(zone, arguments.ArgAt(0));
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if (!length.IsInteger()) {
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// Throw: new ArgumentError.value(length, "length", "is not an integer");
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const Array& args = Array::Handle(zone, Array::New(3));
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args.SetAt(0, length);
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args.SetAt(1, Symbols::Length());
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args.SetAt(2, String::Handle(zone, String::New("is not an integer")));
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Exceptions::ThrowByType(Exceptions::kArgumentValue, args);
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}
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if (length.IsSmi()) {
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const intptr_t len = Smi::Cast(length).Value();
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if (Array::IsValidLength(len)) {
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const Array& array = Array::Handle(zone, Array::New(len, Heap::kNew));
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arguments.SetReturn(array);
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TypeArguments& element_type =
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TypeArguments::CheckedHandle(zone, arguments.ArgAt(1));
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// An Array is raw or takes one type argument. However, its type argument
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// vector may be longer than 1 due to a type optimization reusing the type
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// argument vector of the instantiator.
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ASSERT(element_type.IsNull() ||
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(element_type.Length() >= 1 && element_type.IsInstantiated()));
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array.SetTypeArguments(element_type); // May be null.
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return;
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}
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}
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// Throw: new RangeError.range(length, 0, Array::kMaxElements, "length");
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const Array& args = Array::Handle(zone, Array::New(4));
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args.SetAt(0, length);
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args.SetAt(1, Integer::Handle(zone, Integer::New(0)));
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args.SetAt(2, Integer::Handle(zone, Integer::New(Array::kMaxElements)));
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args.SetAt(3, Symbols::Length());
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Exceptions::ThrowByType(Exceptions::kRange, args);
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}
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// Helper returning the token position of the Dart caller.
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static TokenPosition GetCallerLocation() {
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DartFrameIterator iterator(Thread::Current(),
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StackFrameIterator::kNoCrossThreadIteration);
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StackFrame* caller_frame = iterator.NextFrame();
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ASSERT(caller_frame != NULL);
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return caller_frame->GetTokenPos();
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}
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// Allocate a new object.
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// Arg0: class of the object that needs to be allocated.
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// Arg1: type arguments of the object that needs to be allocated.
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// Return value: newly allocated object.
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DEFINE_RUNTIME_ENTRY(AllocateObject, 2) {
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const Class& cls = Class::CheckedHandle(zone, arguments.ArgAt(0));
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const Instance& instance =
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Instance::Handle(zone, Instance::New(cls, Heap::kNew));
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arguments.SetReturn(instance);
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if (cls.NumTypeArguments() == 0) {
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// No type arguments required for a non-parameterized type.
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ASSERT(Instance::CheckedHandle(zone, arguments.ArgAt(1)).IsNull());
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} else {
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const auto& type_arguments =
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TypeArguments::CheckedHandle(zone, arguments.ArgAt(1));
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// Unless null (for a raw type), the type argument vector may be longer than
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// necessary due to a type optimization reusing the type argument vector of
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// the instantiator.
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ASSERT(type_arguments.IsNull() ||
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(type_arguments.IsInstantiated() &&
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(type_arguments.Length() >= cls.NumTypeArguments())));
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instance.SetTypeArguments(type_arguments);
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}
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}
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DEFINE_LEAF_RUNTIME_ENTRY(RawObject*,
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AddAllocatedObjectToRememberedSet,
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2,
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RawObject* object,
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Thread* thread) {
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// The allocation stubs in will call this leaf method for newly allocated
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// old space objects.
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RELEASE_ASSERT(object->IsOldObject() && !object->IsRemembered());
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// If we eliminate a generational write barriers on allocations of an object
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// we need to ensure it's either a new-space object or it has been added to
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// the remebered set.
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//
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// NOTE: We use reinterpret_cast<>() instead of ::RawCast() to avoid handle
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// allocations in debug mode. Handle allocations in leaf runtimes can cause
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// memory leaks because they will allocate into a handle scope from the next
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// outermost runtime code (to which the genenerated Dart code might not return
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// in a long time).
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bool add_to_remembered_set = true;
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if (object->IsArray()) {
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const intptr_t length =
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Array::LengthOf(reinterpret_cast<RawArray*>(object));
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add_to_remembered_set =
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CreateArrayInstr::WillAllocateNewOrRemembered(length);
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} else if (object->IsContext()) {
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const intptr_t num_context_variables =
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Context::NumVariables(reinterpret_cast<RawContext*>(object));
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add_to_remembered_set =
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AllocateContextInstr::WillAllocateNewOrRemembered(
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num_context_variables) ||
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AllocateUninitializedContextInstr::WillAllocateNewOrRemembered(
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num_context_variables);
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}
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if (add_to_remembered_set) {
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object->AddToRememberedSet(thread);
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}
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// For incremental write barrier elimination, we need to ensure that the
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// allocation ends up in the new space or else the object needs to added
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// to deferred marking stack so it will be [re]scanned.
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if (thread->is_marking()) {
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thread->DeferredMarkingStackAddObject(object);
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}
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return object;
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}
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END_LEAF_RUNTIME_ENTRY
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// Instantiate type.
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// Arg0: uninstantiated type.
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// Arg1: instantiator type arguments.
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// Arg2: function type arguments.
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// Return value: instantiated type.
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DEFINE_RUNTIME_ENTRY(InstantiateType, 3) {
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AbstractType& type = AbstractType::CheckedHandle(zone, arguments.ArgAt(0));
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const TypeArguments& instantiator_type_arguments =
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TypeArguments::CheckedHandle(zone, arguments.ArgAt(1));
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const TypeArguments& function_type_arguments =
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TypeArguments::CheckedHandle(zone, arguments.ArgAt(2));
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ASSERT(!type.IsNull());
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ASSERT(instantiator_type_arguments.IsNull() ||
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instantiator_type_arguments.IsInstantiated());
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ASSERT(function_type_arguments.IsNull() ||
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function_type_arguments.IsInstantiated());
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type =
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type.InstantiateFrom(instantiator_type_arguments, function_type_arguments,
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kAllFree, NULL, Heap::kOld);
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if (type.IsTypeRef()) {
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type = TypeRef::Cast(type).type();
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ASSERT(!type.IsTypeRef());
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ASSERT(type.IsCanonical());
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}
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ASSERT(!type.IsNull() && type.IsInstantiated());
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arguments.SetReturn(type);
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}
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// Instantiate type arguments.
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// Arg0: uninstantiated type arguments.
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// Arg1: instantiator type arguments.
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// Arg2: function type arguments.
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// Return value: instantiated type arguments.
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DEFINE_RUNTIME_ENTRY(InstantiateTypeArguments, 3) {
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TypeArguments& type_arguments =
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TypeArguments::CheckedHandle(zone, arguments.ArgAt(0));
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const TypeArguments& instantiator_type_arguments =
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TypeArguments::CheckedHandle(zone, arguments.ArgAt(1));
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const TypeArguments& function_type_arguments =
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TypeArguments::CheckedHandle(zone, arguments.ArgAt(2));
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ASSERT(!type_arguments.IsNull() && !type_arguments.IsInstantiated());
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ASSERT(instantiator_type_arguments.IsNull() ||
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instantiator_type_arguments.IsInstantiated());
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ASSERT(function_type_arguments.IsNull() ||
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function_type_arguments.IsInstantiated());
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// Code inlined in the caller should have optimized the case where the
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// instantiator can be reused as type argument vector.
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ASSERT(!type_arguments.IsUninstantiatedIdentity());
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type_arguments = type_arguments.InstantiateAndCanonicalizeFrom(
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instantiator_type_arguments, function_type_arguments);
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ASSERT(type_arguments.IsNull() || type_arguments.IsInstantiated());
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arguments.SetReturn(type_arguments);
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}
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// Instantiate type.
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// Arg0: instantiator type arguments
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// Arg1: function type arguments
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// Arg2: type to be a subtype of the other
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// Arg3: type to be a supertype of the other
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// Arg4: variable name of the subtype parameter
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// No return value.
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DEFINE_RUNTIME_ENTRY(SubtypeCheck, 5) {
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const TypeArguments& instantiator_type_args =
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TypeArguments::CheckedHandle(zone, arguments.ArgAt(0));
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const TypeArguments& function_type_args =
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TypeArguments::CheckedHandle(zone, arguments.ArgAt(1));
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AbstractType& subtype = AbstractType::CheckedHandle(zone, arguments.ArgAt(2));
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AbstractType& supertype =
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AbstractType::CheckedHandle(zone, arguments.ArgAt(3));
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const String& dst_name = String::CheckedHandle(zone, arguments.ArgAt(4));
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ASSERT(!subtype.IsNull());
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ASSERT(!supertype.IsNull());
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// The supertype or subtype may not be instantiated.
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if (AbstractType::InstantiateAndTestSubtype(
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&subtype, &supertype, instantiator_type_args, function_type_args)) {
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return;
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}
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// Throw a dynamic type error.
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const TokenPosition location = GetCallerLocation();
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Exceptions::CreateAndThrowTypeError(location, subtype, supertype, dst_name);
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UNREACHABLE();
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}
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|
|
// Allocate a new SubtypeTestCache for use in interpreted implicit setters.
|
|
// Return value: newly allocated SubtypeTestCache.
|
|
DEFINE_RUNTIME_ENTRY(AllocateSubtypeTestCache, 0) {
|
|
ASSERT(FLAG_enable_interpreter);
|
|
arguments.SetReturn(SubtypeTestCache::Handle(zone, SubtypeTestCache::New()));
|
|
}
|
|
|
|
// Allocate a new context large enough to hold the given number of variables.
|
|
// Arg0: number of variables.
|
|
// Return value: newly allocated context.
|
|
DEFINE_RUNTIME_ENTRY(AllocateContext, 1) {
|
|
const Smi& num_variables = Smi::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const Context& context =
|
|
Context::Handle(zone, Context::New(num_variables.Value()));
|
|
arguments.SetReturn(context);
|
|
}
|
|
|
|
// Make a copy of the given context, including the values of the captured
|
|
// variables.
|
|
// Arg0: the context to be cloned.
|
|
// Return value: newly allocated context.
|
|
DEFINE_RUNTIME_ENTRY(CloneContext, 1) {
|
|
const Context& ctx = Context::CheckedHandle(zone, arguments.ArgAt(0));
|
|
Context& cloned_ctx =
|
|
Context::Handle(zone, Context::New(ctx.num_variables()));
|
|
cloned_ctx.set_parent(Context::Handle(zone, ctx.parent()));
|
|
Object& inst = Object::Handle(zone);
|
|
for (int i = 0; i < ctx.num_variables(); i++) {
|
|
inst = ctx.At(i);
|
|
cloned_ctx.SetAt(i, inst);
|
|
}
|
|
arguments.SetReturn(cloned_ctx);
|
|
}
|
|
|
|
// Result of an invoke may be an unhandled exception, in which case we
|
|
// rethrow it.
|
|
static void ThrowIfError(const Object& result) {
|
|
if (!result.IsNull() && result.IsError()) {
|
|
Exceptions::PropagateError(Error::Cast(result));
|
|
}
|
|
}
|
|
|
|
// Invoke field getter before dispatch.
|
|
// Arg0: instance.
|
|
// Arg1: field name.
|
|
// Return value: field value.
|
|
DEFINE_RUNTIME_ENTRY(GetFieldForDispatch, 2) {
|
|
ASSERT(FLAG_enable_interpreter);
|
|
const Instance& receiver = Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const String& name = String::CheckedHandle(zone, arguments.ArgAt(1));
|
|
const Class& receiver_class = Class::Handle(zone, receiver.clazz());
|
|
const String& getter_name = String::Handle(zone, Field::GetterName(name));
|
|
const int kTypeArgsLen = 0;
|
|
const int kNumArguments = 1;
|
|
ArgumentsDescriptor args_desc(Array::Handle(
|
|
zone, ArgumentsDescriptor::New(kTypeArgsLen, kNumArguments)));
|
|
const Function& getter =
|
|
Function::Handle(zone, Resolver::ResolveDynamicForReceiverClass(
|
|
receiver_class, getter_name, args_desc));
|
|
ASSERT(!getter.IsNull()); // An InvokeFieldDispatcher function was created.
|
|
const Array& args = Array::Handle(zone, Array::New(kNumArguments));
|
|
args.SetAt(0, receiver);
|
|
const Object& result =
|
|
Object::Handle(zone, DartEntry::InvokeFunction(getter, args));
|
|
ThrowIfError(result);
|
|
arguments.SetReturn(result);
|
|
}
|
|
|
|
// Resolve 'call' function of receiver.
|
|
// Arg0: receiver (not a closure).
|
|
// Arg1: arguments descriptor
|
|
// Return value: 'call' function'.
|
|
DEFINE_RUNTIME_ENTRY(ResolveCallFunction, 2) {
|
|
ASSERT(FLAG_enable_interpreter);
|
|
const Instance& receiver = Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const Array& descriptor = Array::CheckedHandle(zone, arguments.ArgAt(1));
|
|
ArgumentsDescriptor args_desc(descriptor);
|
|
ASSERT(!receiver.IsClosure()); // Interpreter tests for closure.
|
|
Class& cls = Class::Handle(zone, receiver.clazz());
|
|
Function& call_function = Function::Handle(zone);
|
|
do {
|
|
call_function = cls.LookupDynamicFunction(Symbols::Call());
|
|
if (!call_function.IsNull()) {
|
|
if (!call_function.AreValidArguments(args_desc, NULL)) {
|
|
call_function = Function::null();
|
|
}
|
|
break;
|
|
}
|
|
cls = cls.SuperClass();
|
|
} while (!cls.IsNull());
|
|
arguments.SetReturn(call_function);
|
|
}
|
|
|
|
// Helper routine for tracing a type check.
|
|
static void PrintTypeCheck(const char* message,
|
|
const Instance& instance,
|
|
const AbstractType& type,
|
|
const TypeArguments& instantiator_type_arguments,
|
|
const TypeArguments& function_type_arguments,
|
|
const Bool& result) {
|
|
DartFrameIterator iterator(Thread::Current(),
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(caller_frame != NULL);
|
|
|
|
const AbstractType& instance_type =
|
|
AbstractType::Handle(instance.GetType(Heap::kNew));
|
|
ASSERT(instance_type.IsInstantiated() ||
|
|
(instance.IsClosure() && instance_type.IsInstantiated(kCurrentClass)));
|
|
if (type.IsInstantiated()) {
|
|
OS::PrintErr("%s: '%s' %" Pd " %s '%s' %" Pd " (pc: %#" Px ").\n", message,
|
|
String::Handle(instance_type.Name()).ToCString(),
|
|
Class::Handle(instance_type.type_class()).id(),
|
|
(result.raw() == Bool::True().raw()) ? "is" : "is !",
|
|
String::Handle(type.Name()).ToCString(),
|
|
Class::Handle(type.type_class()).id(), caller_frame->pc());
|
|
} else {
|
|
// Instantiate type before printing.
|
|
const AbstractType& instantiated_type =
|
|
AbstractType::Handle(type.InstantiateFrom(instantiator_type_arguments,
|
|
function_type_arguments,
|
|
kAllFree, NULL, Heap::kOld));
|
|
OS::PrintErr("%s: '%s' %s '%s' instantiated from '%s' (pc: %#" Px ").\n",
|
|
message, String::Handle(instance_type.Name()).ToCString(),
|
|
(result.raw() == Bool::True().raw()) ? "is" : "is !",
|
|
String::Handle(instantiated_type.Name()).ToCString(),
|
|
String::Handle(type.Name()).ToCString(), caller_frame->pc());
|
|
}
|
|
const Function& function =
|
|
Function::Handle(caller_frame->LookupDartFunction());
|
|
OS::PrintErr(" -> Function %s\n", function.ToFullyQualifiedCString());
|
|
}
|
|
|
|
// This updates the type test cache, an array containing 5-value elements
|
|
// (instance class (or function if the instance is a closure), instance type
|
|
// arguments, instantiator type arguments, function type arguments,
|
|
// and test_result). It can be applied to classes with type arguments in which
|
|
// case it contains just the result of the class subtype test, not including the
|
|
// evaluation of type arguments.
|
|
// This operation is currently very slow (lookup of code is not efficient yet).
|
|
static void UpdateTypeTestCache(
|
|
Zone* zone,
|
|
const Instance& instance,
|
|
const AbstractType& type,
|
|
const TypeArguments& instantiator_type_arguments,
|
|
const TypeArguments& function_type_arguments,
|
|
const Bool& result,
|
|
const SubtypeTestCache& new_cache) {
|
|
// Since the test is expensive, don't do it unless necessary.
|
|
// The list of disallowed cases will decrease as they are implemented in
|
|
// inlined assembly.
|
|
if (new_cache.IsNull()) {
|
|
if (FLAG_trace_type_checks) {
|
|
OS::PrintErr("UpdateTypeTestCache: cache is null\n");
|
|
}
|
|
return;
|
|
}
|
|
Class& instance_class = Class::Handle(zone);
|
|
if (instance.IsSmi()) {
|
|
instance_class = Smi::Class();
|
|
} else {
|
|
instance_class = instance.clazz();
|
|
}
|
|
// If the type is uninstantiated and refers to parent function type
|
|
// parameters, the function_type_arguments have been canonicalized
|
|
// when concatenated.
|
|
ASSERT(function_type_arguments.IsNull() ||
|
|
function_type_arguments.IsCanonical());
|
|
auto& instance_class_id_or_function = Object::Handle(zone);
|
|
auto& instance_type_arguments = TypeArguments::Handle(zone);
|
|
auto& instance_parent_function_type_arguments = TypeArguments::Handle(zone);
|
|
auto& instance_delayed_type_arguments = TypeArguments::Handle(zone);
|
|
if (instance_class.IsClosureClass()) {
|
|
const auto& closure = Closure::Cast(instance);
|
|
const auto& closure_function = Function::Handle(zone, closure.function());
|
|
instance_class_id_or_function = closure_function.raw();
|
|
instance_type_arguments = closure.instantiator_type_arguments();
|
|
instance_parent_function_type_arguments = closure.function_type_arguments();
|
|
instance_delayed_type_arguments = closure.delayed_type_arguments();
|
|
} else {
|
|
instance_class_id_or_function = Smi::New(instance_class.id());
|
|
if (instance_class.NumTypeArguments() > 0) {
|
|
instance_type_arguments = instance.GetTypeArguments();
|
|
}
|
|
}
|
|
const intptr_t len = new_cache.NumberOfChecks();
|
|
if (len >= FLAG_max_subtype_cache_entries) {
|
|
return;
|
|
}
|
|
#if defined(DEBUG)
|
|
ASSERT(instance_type_arguments.IsNull() ||
|
|
instance_type_arguments.IsCanonical());
|
|
ASSERT(instantiator_type_arguments.IsNull() ||
|
|
instantiator_type_arguments.IsCanonical());
|
|
ASSERT(function_type_arguments.IsNull() ||
|
|
function_type_arguments.IsCanonical());
|
|
ASSERT(instance_parent_function_type_arguments.IsNull() ||
|
|
instance_parent_function_type_arguments.IsCanonical());
|
|
ASSERT(instance_delayed_type_arguments.IsNull() ||
|
|
instance_delayed_type_arguments.IsCanonical());
|
|
auto& last_instance_class_id_or_function = Object::Handle(zone);
|
|
auto& last_instance_type_arguments = TypeArguments::Handle(zone);
|
|
auto& last_instantiator_type_arguments = TypeArguments::Handle(zone);
|
|
auto& last_function_type_arguments = TypeArguments::Handle(zone);
|
|
auto& last_instance_parent_function_type_arguments =
|
|
TypeArguments::Handle(zone);
|
|
auto& last_instance_delayed_type_arguments = TypeArguments::Handle(zone);
|
|
Bool& last_result = Bool::Handle(zone);
|
|
for (intptr_t i = 0; i < len; ++i) {
|
|
new_cache.GetCheck(
|
|
i, &last_instance_class_id_or_function, &last_instance_type_arguments,
|
|
&last_instantiator_type_arguments, &last_function_type_arguments,
|
|
&last_instance_parent_function_type_arguments,
|
|
&last_instance_delayed_type_arguments, &last_result);
|
|
if ((last_instance_class_id_or_function.raw() ==
|
|
instance_class_id_or_function.raw()) &&
|
|
(last_instance_type_arguments.raw() == instance_type_arguments.raw()) &&
|
|
(last_instantiator_type_arguments.raw() ==
|
|
instantiator_type_arguments.raw()) &&
|
|
(last_function_type_arguments.raw() == function_type_arguments.raw()) &&
|
|
(last_instance_parent_function_type_arguments.raw() ==
|
|
instance_parent_function_type_arguments.raw()) &&
|
|
(last_instance_delayed_type_arguments.raw() ==
|
|
instance_delayed_type_arguments.raw())) {
|
|
OS::PrintErr(" Error in test cache %p ix: %" Pd ",", new_cache.raw(), i);
|
|
PrintTypeCheck(" duplicate cache entry", instance, type,
|
|
instantiator_type_arguments, function_type_arguments,
|
|
result);
|
|
UNREACHABLE();
|
|
return;
|
|
}
|
|
}
|
|
#endif
|
|
new_cache.AddCheck(instance_class_id_or_function, instance_type_arguments,
|
|
instantiator_type_arguments, function_type_arguments,
|
|
instance_parent_function_type_arguments,
|
|
instance_delayed_type_arguments, result);
|
|
if (FLAG_trace_type_checks) {
|
|
AbstractType& test_type = AbstractType::Handle(zone, type.raw());
|
|
if (!test_type.IsInstantiated()) {
|
|
test_type = type.InstantiateFrom(instantiator_type_arguments,
|
|
function_type_arguments, kAllFree, NULL,
|
|
Heap::kNew);
|
|
}
|
|
const auto& type_class = Class::Handle(zone, test_type.type_class());
|
|
const auto& instance_class_name =
|
|
String::Handle(zone, instance_class.Name());
|
|
OS::PrintErr(
|
|
" Updated test cache %p ix: %" Pd
|
|
" with "
|
|
"(cid-or-fun: %p, type-args: %p, i-type-args: %p, f-type-args: %p, "
|
|
"p-type-args: %p, d-type-args: %p, result: %s)\n"
|
|
" instance [class: (%p '%s' cid: %" Pd
|
|
"), type-args: %p %s]\n"
|
|
" test-type [class: (%p '%s' cid: %" Pd
|
|
"), i-type-args: %p %s, f-type-args: %p %s]\n",
|
|
new_cache.raw(), len, instance_class_id_or_function.raw(),
|
|
instance_type_arguments.raw(), instantiator_type_arguments.raw(),
|
|
function_type_arguments.raw(),
|
|
instance_parent_function_type_arguments.raw(),
|
|
instance_delayed_type_arguments.raw(), result.ToCString(),
|
|
instance_class.raw(), instance_class_name.ToCString(),
|
|
instance_class.id(), instance_type_arguments.raw(),
|
|
instance_type_arguments.ToCString(), type_class.raw(),
|
|
String::Handle(zone, type_class.Name()).ToCString(), type_class.id(),
|
|
instantiator_type_arguments.raw(),
|
|
instantiator_type_arguments.ToCString(), function_type_arguments.raw(),
|
|
function_type_arguments.ToCString());
|
|
}
|
|
}
|
|
|
|
// Check that the given instance is an instance of the given type.
|
|
// Tested instance may not be null, because the null test is inlined.
|
|
// Arg0: instance being checked.
|
|
// Arg1: type.
|
|
// Arg2: type arguments of the instantiator of the type.
|
|
// Arg3: type arguments of the function of the type.
|
|
// Arg4: SubtypeTestCache.
|
|
// Return value: true or false, or may throw a type error in checked mode.
|
|
DEFINE_RUNTIME_ENTRY(Instanceof, 5) {
|
|
const Instance& instance = Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const AbstractType& type =
|
|
AbstractType::CheckedHandle(zone, arguments.ArgAt(1));
|
|
const TypeArguments& instantiator_type_arguments =
|
|
TypeArguments::CheckedHandle(zone, arguments.ArgAt(2));
|
|
const TypeArguments& function_type_arguments =
|
|
TypeArguments::CheckedHandle(zone, arguments.ArgAt(3));
|
|
const SubtypeTestCache& cache =
|
|
SubtypeTestCache::CheckedHandle(zone, arguments.ArgAt(4));
|
|
ASSERT(type.IsFinalized());
|
|
ASSERT(!type.IsDynamicType()); // No need to check assignment.
|
|
const Bool& result = Bool::Get(instance.IsInstanceOf(
|
|
type, instantiator_type_arguments, function_type_arguments));
|
|
if (FLAG_trace_type_checks) {
|
|
PrintTypeCheck("InstanceOf", instance, type, instantiator_type_arguments,
|
|
function_type_arguments, result);
|
|
}
|
|
UpdateTypeTestCache(zone, instance, type, instantiator_type_arguments,
|
|
function_type_arguments, result, cache);
|
|
arguments.SetReturn(result);
|
|
}
|
|
|
|
// Check that the type of the given instance is a subtype of the given type and
|
|
// can therefore be assigned.
|
|
// Arg0: instance being assigned.
|
|
// Arg1: type being assigned to.
|
|
// Arg2: type arguments of the instantiator of the type being assigned to.
|
|
// Arg3: type arguments of the function of the type being assigned to.
|
|
// Arg4: name of variable being assigned to.
|
|
// Arg5: SubtypeTestCache.
|
|
// Arg6: invocation mode (see TypeCheckMode)
|
|
// Return value: instance if a subtype, otherwise throw a TypeError.
|
|
DEFINE_RUNTIME_ENTRY(TypeCheck, 7) {
|
|
const Instance& src_instance =
|
|
Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
AbstractType& dst_type =
|
|
AbstractType::CheckedHandle(zone, arguments.ArgAt(1));
|
|
const TypeArguments& instantiator_type_arguments =
|
|
TypeArguments::CheckedHandle(zone, arguments.ArgAt(2));
|
|
const TypeArguments& function_type_arguments =
|
|
TypeArguments::CheckedHandle(zone, arguments.ArgAt(3));
|
|
String& dst_name = String::Handle(zone);
|
|
dst_name ^= arguments.ArgAt(4);
|
|
ASSERT(dst_name.IsNull() || dst_name.IsString());
|
|
|
|
SubtypeTestCache& cache = SubtypeTestCache::Handle(zone);
|
|
cache ^= arguments.ArgAt(5);
|
|
ASSERT(cache.IsNull() || cache.IsSubtypeTestCache());
|
|
|
|
const TypeCheckMode mode = static_cast<TypeCheckMode>(
|
|
Smi::CheckedHandle(zone, arguments.ArgAt(6)).Value());
|
|
|
|
#if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_DBC)
|
|
ASSERT(mode == kTypeCheckFromInline);
|
|
#endif
|
|
|
|
ASSERT(!dst_type.IsDynamicType()); // No need to check assignment.
|
|
ASSERT(!src_instance.IsNull()); // Already checked in inlined code.
|
|
|
|
const bool is_instance_of = src_instance.IsInstanceOf(
|
|
dst_type, instantiator_type_arguments, function_type_arguments);
|
|
|
|
if (FLAG_trace_type_checks) {
|
|
PrintTypeCheck("TypeCheck", src_instance, dst_type,
|
|
instantiator_type_arguments, function_type_arguments,
|
|
Bool::Get(is_instance_of));
|
|
}
|
|
if (!is_instance_of) {
|
|
// Throw a dynamic type error.
|
|
const TokenPosition location = GetCallerLocation();
|
|
const AbstractType& src_type =
|
|
AbstractType::Handle(zone, src_instance.GetType(Heap::kNew));
|
|
if (!dst_type.IsInstantiated()) {
|
|
// Instantiate dst_type before reporting the error.
|
|
dst_type = dst_type.InstantiateFrom(instantiator_type_arguments,
|
|
function_type_arguments, kAllFree,
|
|
NULL, Heap::kNew);
|
|
// Note that instantiated dst_type may be malbounded.
|
|
}
|
|
if (dst_name.IsNull()) {
|
|
#if !defined(TARGET_ARCH_DBC) && !defined(TARGET_ARCH_IA32)
|
|
// Can only come here from type testing stub.
|
|
ASSERT(mode != kTypeCheckFromInline);
|
|
|
|
// Grab the [dst_name] from the pool. It's stored at one pool slot after
|
|
// the subtype-test-cache.
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(!caller_frame->is_interpreted());
|
|
const Code& caller_code =
|
|
Code::Handle(zone, caller_frame->LookupDartCode());
|
|
const ObjectPool& pool =
|
|
ObjectPool::Handle(zone, caller_code.GetObjectPool());
|
|
TypeTestingStubCallPattern tts_pattern(caller_frame->pc());
|
|
const intptr_t stc_pool_idx = tts_pattern.GetSubtypeTestCachePoolIndex();
|
|
const intptr_t dst_name_idx = stc_pool_idx + 1;
|
|
dst_name ^= pool.ObjectAt(dst_name_idx);
|
|
#else
|
|
UNREACHABLE();
|
|
#endif
|
|
}
|
|
|
|
Exceptions::CreateAndThrowTypeError(location, src_type, dst_type, dst_name);
|
|
UNREACHABLE();
|
|
}
|
|
|
|
bool should_update_cache = true;
|
|
#if !defined(TARGET_ARCH_DBC) && !defined(TARGET_ARCH_IA32) && \
|
|
!defined(DART_PRECOMPILED_RUNTIME)
|
|
if (mode == kTypeCheckFromLazySpecializeStub) {
|
|
TypeTestingStubGenerator::SpecializeStubFor(thread, dst_type);
|
|
// Only create the cache when we come from a normal stub.
|
|
should_update_cache = false;
|
|
}
|
|
#endif
|
|
|
|
if (should_update_cache) {
|
|
if (cache.IsNull()) {
|
|
#if !defined(TARGET_ARCH_DBC) && !defined(TARGET_ARCH_IA32)
|
|
ASSERT(mode == kTypeCheckFromSlowStub);
|
|
// We lazily create [SubtypeTestCache] for those call sites which actually
|
|
// need one and will patch the pool entry.
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(!caller_frame->is_interpreted());
|
|
const Code& caller_code =
|
|
Code::Handle(zone, caller_frame->LookupDartCode());
|
|
const ObjectPool& pool =
|
|
ObjectPool::Handle(zone, caller_code.GetObjectPool());
|
|
TypeTestingStubCallPattern tts_pattern(caller_frame->pc());
|
|
const intptr_t stc_pool_idx = tts_pattern.GetSubtypeTestCachePoolIndex();
|
|
|
|
// The pool entry must be initialized to `null` when we patch it.
|
|
ASSERT(pool.ObjectAt(stc_pool_idx) == Object::null());
|
|
cache = SubtypeTestCache::New();
|
|
pool.SetObjectAt(stc_pool_idx, cache);
|
|
#else
|
|
UNREACHABLE();
|
|
#endif
|
|
}
|
|
|
|
UpdateTypeTestCache(zone, src_instance, dst_type,
|
|
instantiator_type_arguments, function_type_arguments,
|
|
Bool::True(), cache);
|
|
}
|
|
|
|
arguments.SetReturn(src_instance);
|
|
}
|
|
|
|
// Report that the type of the given object is not bool in conditional context.
|
|
// Throw assertion error if the object is null. (cf. Boolean Conversion
|
|
// in language Spec.)
|
|
// Arg0: bad object.
|
|
// Return value: none, throws TypeError or AssertionError.
|
|
DEFINE_RUNTIME_ENTRY(NonBoolTypeError, 1) {
|
|
const TokenPosition location = GetCallerLocation();
|
|
const Instance& src_instance =
|
|
Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
|
|
if (src_instance.IsNull()) {
|
|
const Array& args = Array::Handle(zone, Array::New(5));
|
|
args.SetAt(
|
|
0, String::Handle(
|
|
zone,
|
|
String::New(
|
|
"Failed assertion: boolean expression must not be null")));
|
|
|
|
// No source code for this assertion, set url to null.
|
|
args.SetAt(1, String::Handle(zone, String::null()));
|
|
args.SetAt(2, Object::smi_zero());
|
|
args.SetAt(3, Object::smi_zero());
|
|
args.SetAt(4, String::Handle(zone, String::null()));
|
|
|
|
Exceptions::ThrowByType(Exceptions::kAssertion, args);
|
|
UNREACHABLE();
|
|
}
|
|
|
|
ASSERT(!src_instance.IsBool());
|
|
const Type& bool_interface = Type::Handle(Type::BoolType());
|
|
const AbstractType& src_type =
|
|
AbstractType::Handle(zone, src_instance.GetType(Heap::kNew));
|
|
Exceptions::CreateAndThrowTypeError(location, src_type, bool_interface,
|
|
Symbols::BooleanExpression());
|
|
UNREACHABLE();
|
|
}
|
|
|
|
// Report that the type of the type check is malformed or malbounded.
|
|
// Arg0: src value.
|
|
// Arg1: name of destination being assigned to.
|
|
// Arg2: type of destination being assigned to.
|
|
// Return value: none, throws an exception.
|
|
DEFINE_RUNTIME_ENTRY(BadTypeError, 3) {
|
|
const TokenPosition location = GetCallerLocation();
|
|
const Instance& src_value = Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const String& dst_name = String::CheckedHandle(zone, arguments.ArgAt(1));
|
|
const AbstractType& dst_type =
|
|
AbstractType::CheckedHandle(zone, arguments.ArgAt(2));
|
|
const AbstractType& src_type =
|
|
AbstractType::Handle(zone, src_value.GetType(Heap::kNew));
|
|
Exceptions::CreateAndThrowTypeError(location, src_type, dst_type, dst_name);
|
|
UNREACHABLE();
|
|
}
|
|
|
|
DEFINE_RUNTIME_ENTRY(Throw, 1) {
|
|
const Instance& exception = Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
Exceptions::Throw(thread, exception);
|
|
}
|
|
|
|
DEFINE_RUNTIME_ENTRY(ReThrow, 2) {
|
|
const Instance& exception = Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const Instance& stacktrace =
|
|
Instance::CheckedHandle(zone, arguments.ArgAt(1));
|
|
Exceptions::ReThrow(thread, exception, stacktrace);
|
|
}
|
|
|
|
// Patches static call in optimized code with the target's entry point.
|
|
// Compiles target if necessary.
|
|
DEFINE_RUNTIME_ENTRY(PatchStaticCall, 0) {
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(caller_frame != NULL);
|
|
ASSERT(!caller_frame->is_interpreted());
|
|
const Code& caller_code = Code::Handle(zone, caller_frame->LookupDartCode());
|
|
ASSERT(!caller_code.IsNull());
|
|
ASSERT(caller_code.is_optimized());
|
|
const Function& target_function = Function::Handle(
|
|
zone, caller_code.GetStaticCallTargetFunctionAt(caller_frame->pc()));
|
|
const Code& target_code = Code::Handle(zone, target_function.EnsureHasCode());
|
|
// Before patching verify that we are not repeatedly patching to the same
|
|
// target.
|
|
ASSERT(target_code.raw() !=
|
|
CodePatcher::GetStaticCallTargetAt(caller_frame->pc(), caller_code));
|
|
CodePatcher::PatchStaticCallAt(caller_frame->pc(), caller_code, target_code);
|
|
caller_code.SetStaticCallTargetCodeAt(caller_frame->pc(), target_code);
|
|
if (FLAG_trace_patching) {
|
|
THR_Print("PatchStaticCall: patching caller pc %#" Px
|
|
""
|
|
" to '%s' new entry point %#" Px " (%s)\n",
|
|
caller_frame->pc(), target_function.ToFullyQualifiedCString(),
|
|
target_code.EntryPoint(),
|
|
target_code.is_optimized() ? "optimized" : "unoptimized");
|
|
}
|
|
arguments.SetReturn(target_code);
|
|
#else
|
|
UNREACHABLE();
|
|
#endif
|
|
}
|
|
|
|
#if defined(PRODUCT) || defined(DART_PRECOMPILED_RUNTIME)
|
|
DEFINE_RUNTIME_ENTRY(BreakpointRuntimeHandler, 0) {
|
|
UNREACHABLE();
|
|
return;
|
|
}
|
|
#elif !defined(TARGET_ARCH_DBC)
|
|
// Gets called from debug stub when code reaches a breakpoint
|
|
// set on a runtime stub call.
|
|
DEFINE_RUNTIME_ENTRY(BreakpointRuntimeHandler, 0) {
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(caller_frame != NULL);
|
|
Code& orig_stub = Code::Handle(zone);
|
|
if (!caller_frame->is_interpreted()) {
|
|
orig_stub = isolate->debugger()->GetPatchedStubAddress(caller_frame->pc());
|
|
}
|
|
const Error& error =
|
|
Error::Handle(zone, isolate->debugger()->PauseBreakpoint());
|
|
ThrowIfError(error);
|
|
arguments.SetReturn(orig_stub);
|
|
}
|
|
#else
|
|
// Gets called from the simulator when the breakpoint is reached.
|
|
DEFINE_RUNTIME_ENTRY(BreakpointRuntimeHandler, 0) {
|
|
const Error& error = Error::Handle(isolate->debugger()->PauseBreakpoint());
|
|
ThrowIfError(error);
|
|
}
|
|
#endif // !defined(TARGET_ARCH_DBC)
|
|
|
|
DEFINE_RUNTIME_ENTRY(SingleStepHandler, 0) {
|
|
#if defined(PRODUCT) || defined(DART_PRECOMPILED_RUNTIME)
|
|
UNREACHABLE();
|
|
#else
|
|
const Error& error =
|
|
Error::Handle(zone, isolate->debugger()->PauseStepping());
|
|
ThrowIfError(error);
|
|
#endif
|
|
}
|
|
|
|
// An instance call of the form o.f(...) could not be resolved. Check if
|
|
// there is a getter with the same name. If so, invoke it. If the value is
|
|
// a closure, invoke it with the given arguments. If the value is a
|
|
// non-closure, attempt to invoke "call" on it.
|
|
static bool ResolveCallThroughGetter(const Instance& receiver,
|
|
const Class& receiver_class,
|
|
const String& target_name,
|
|
const Array& arguments_descriptor,
|
|
Function* result) {
|
|
// 1. Check if there is a getter with the same name.
|
|
const String& getter_name = String::Handle(Field::GetterName(target_name));
|
|
const int kTypeArgsLen = 0;
|
|
const int kNumArguments = 1;
|
|
ArgumentsDescriptor args_desc(
|
|
Array::Handle(ArgumentsDescriptor::New(kTypeArgsLen, kNumArguments)));
|
|
const Function& getter =
|
|
Function::Handle(Resolver::ResolveDynamicForReceiverClass(
|
|
receiver_class, getter_name, args_desc));
|
|
if (getter.IsNull() || getter.IsMethodExtractor()) {
|
|
return false;
|
|
}
|
|
const Function& target_function =
|
|
Function::Handle(receiver_class.GetInvocationDispatcher(
|
|
target_name, arguments_descriptor,
|
|
RawFunction::kInvokeFieldDispatcher, FLAG_lazy_dispatchers));
|
|
ASSERT(!target_function.IsNull() || !FLAG_lazy_dispatchers);
|
|
if (FLAG_trace_ic) {
|
|
OS::PrintErr(
|
|
"InvokeField IC miss: adding <%s> id:%" Pd " -> <%s>\n",
|
|
Class::Handle(receiver.clazz()).ToCString(), receiver.GetClassId(),
|
|
target_function.IsNull() ? "null" : target_function.ToCString());
|
|
}
|
|
*result = target_function.raw();
|
|
return true;
|
|
}
|
|
|
|
// Handle other invocations (implicit closures, noSuchMethod).
|
|
RawFunction* InlineCacheMissHelper(const Instance& receiver,
|
|
const Array& args_descriptor,
|
|
const String& target_name) {
|
|
const Class& receiver_class = Class::Handle(receiver.clazz());
|
|
|
|
// Handle noSuchMethod for dyn:methodName by getting a noSuchMethod dispatcher
|
|
// (or a call-through getter for methodName).
|
|
if (Function::IsDynamicInvocationForwarderName(target_name)) {
|
|
const String& demangled = String::Handle(
|
|
Function::DemangleDynamicInvocationForwarderName(target_name));
|
|
return InlineCacheMissHelper(receiver, args_descriptor, demangled);
|
|
}
|
|
|
|
Function& result = Function::Handle();
|
|
if (!ResolveCallThroughGetter(receiver, receiver_class, target_name,
|
|
args_descriptor, &result)) {
|
|
ArgumentsDescriptor desc(args_descriptor);
|
|
const Function& target_function =
|
|
Function::Handle(receiver_class.GetInvocationDispatcher(
|
|
target_name, args_descriptor, RawFunction::kNoSuchMethodDispatcher,
|
|
FLAG_lazy_dispatchers));
|
|
if (FLAG_trace_ic) {
|
|
OS::PrintErr(
|
|
"NoSuchMethod IC miss: adding <%s> id:%" Pd " -> <%s>\n",
|
|
Class::Handle(receiver.clazz()).ToCString(), receiver.GetClassId(),
|
|
target_function.IsNull() ? "null" : target_function.ToCString());
|
|
}
|
|
result = target_function.raw();
|
|
}
|
|
// May be null if --no-lazy-dispatchers, in which case dispatch will be
|
|
// handled by NoSuchMethodFromCallStub.
|
|
ASSERT(!result.IsNull() || !FLAG_lazy_dispatchers);
|
|
return result.raw();
|
|
}
|
|
|
|
static void TrySwitchInstanceCall(const ICData& ic_data,
|
|
const Function& target_function) {
|
|
#if !defined(TARGET_ARCH_DBC) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
// Monomorphic/megamorphic calls only check the receiver CID.
|
|
if (ic_data.NumArgsTested() != 1) return;
|
|
|
|
ASSERT(ic_data.rebind_rule() == ICData::kInstance);
|
|
|
|
// Monomorphic/megamorphic calls don't record exactness.
|
|
if (ic_data.is_tracking_exactness()) return;
|
|
|
|
#if !defined(PRODUCT)
|
|
// Monomorphic/megamorphic do not check the isolate's stepping flag.
|
|
if (Isolate::Current()->has_attempted_stepping()) return;
|
|
#endif
|
|
|
|
Thread* thread = Thread::Current();
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(caller_frame->IsDartFrame());
|
|
|
|
// Monomorphic/megamorphic calls are only for unoptimized code.
|
|
if (caller_frame->is_interpreted()) return;
|
|
Zone* zone = thread->zone();
|
|
const Code& caller_code = Code::Handle(zone, caller_frame->LookupDartCode());
|
|
if (caller_code.is_optimized()) return;
|
|
|
|
// Code is detached from its function. This will prevent us from resetting
|
|
// the switchable call later because resets are function based and because
|
|
// the ic_data_array belongs to the function instead of the code. This should
|
|
// only happen because of reload, but it sometimes happens with KBC mixed mode
|
|
// probably through a race between foreground and background compilation.
|
|
const Function& caller_function =
|
|
Function::Handle(zone, caller_code.function());
|
|
if (caller_function.unoptimized_code() != caller_code.raw()) {
|
|
return;
|
|
}
|
|
#if !defined(PRODUCT)
|
|
// Skip functions that contain breakpoints or when debugger is in single
|
|
// stepping mode.
|
|
if (Debugger::IsDebugging(thread, caller_function)) return;
|
|
#endif
|
|
|
|
const intptr_t num_checks = ic_data.NumberOfChecks();
|
|
|
|
// Monomorphic call.
|
|
if (FLAG_unopt_monomorphic_calls && (num_checks == 1)) {
|
|
// A call site in the monomorphic state does not load the arguments
|
|
// descriptor, so do not allow transition to this state if the callee
|
|
// needs it.
|
|
if (target_function.HasOptionalParameters() ||
|
|
target_function.IsGeneric()) {
|
|
return;
|
|
}
|
|
|
|
// Avoid forcing foreground compilation if target function is still
|
|
// interpreted.
|
|
if (FLAG_enable_interpreter && !target_function.HasCode()) {
|
|
return;
|
|
}
|
|
|
|
const Array& data = Array::Handle(zone, ic_data.entries());
|
|
const Code& target = Code::Handle(zone, target_function.EnsureHasCode());
|
|
CodePatcher::PatchInstanceCallAt(caller_frame->pc(), caller_code, data,
|
|
target);
|
|
if (FLAG_trace_ic) {
|
|
OS::PrintErr("Instance call at %" Px
|
|
" switching to monomorphic dispatch, %s\n",
|
|
caller_frame->pc(), ic_data.ToCString());
|
|
}
|
|
return; // Success.
|
|
}
|
|
|
|
// Megamorphic call.
|
|
if (FLAG_unopt_megamorphic_calls &&
|
|
(num_checks > FLAG_max_polymorphic_checks)) {
|
|
const String& name = String::Handle(zone, ic_data.target_name());
|
|
const Array& descriptor =
|
|
Array::Handle(zone, ic_data.arguments_descriptor());
|
|
const MegamorphicCache& cache = MegamorphicCache::Handle(
|
|
zone, MegamorphicCacheTable::Lookup(thread, name, descriptor));
|
|
ic_data.set_is_megamorphic(true);
|
|
CodePatcher::PatchInstanceCallAt(caller_frame->pc(), caller_code, cache,
|
|
StubCode::MegamorphicCall());
|
|
if (FLAG_trace_ic) {
|
|
OS::PrintErr("Instance call at %" Px
|
|
" switching to megamorphic dispatch, %s\n",
|
|
caller_frame->pc(), ic_data.ToCString());
|
|
}
|
|
return; // Success.
|
|
}
|
|
|
|
#endif // !defined(TARGET_ARCH_DBC) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
}
|
|
|
|
// Perform the subtype and return constant function based on the result.
|
|
static RawFunction* ComputeTypeCheckTarget(const Instance& receiver,
|
|
const AbstractType& type,
|
|
const ArgumentsDescriptor& desc) {
|
|
bool result = receiver.IsInstanceOf(type, Object::null_type_arguments(),
|
|
Object::null_type_arguments());
|
|
ObjectStore* store = Isolate::Current()->object_store();
|
|
const Function& target =
|
|
Function::Handle(result ? store->simple_instance_of_true_function()
|
|
: store->simple_instance_of_false_function());
|
|
ASSERT(!target.IsNull());
|
|
return target.raw();
|
|
}
|
|
|
|
static RawFunction* InlineCacheMissHandler(
|
|
const GrowableArray<const Instance*>& args, // Checked arguments only.
|
|
const ICData& ic_data,
|
|
intptr_t count = 1) {
|
|
const Instance& receiver = *args[0];
|
|
ArgumentsDescriptor arguments_descriptor(
|
|
Array::Handle(ic_data.arguments_descriptor()));
|
|
String& function_name = String::Handle(ic_data.target_name());
|
|
ASSERT(function_name.IsSymbol());
|
|
|
|
Function& target_function = Function::Handle(
|
|
Resolver::ResolveDynamic(receiver, function_name, arguments_descriptor));
|
|
|
|
ObjectStore* store = Isolate::Current()->object_store();
|
|
if (target_function.raw() == store->simple_instance_of_function()) {
|
|
// Replace the target function with constant function.
|
|
ASSERT(args.length() == 2);
|
|
const AbstractType& type = AbstractType::Cast(*args[1]);
|
|
target_function =
|
|
ComputeTypeCheckTarget(receiver, type, arguments_descriptor);
|
|
}
|
|
if (target_function.IsNull()) {
|
|
if (FLAG_trace_ic) {
|
|
OS::PrintErr("InlineCacheMissHandler NULL function for %s receiver: %s\n",
|
|
String::Handle(ic_data.target_name()).ToCString(),
|
|
receiver.ToCString());
|
|
}
|
|
const Array& args_descriptor =
|
|
Array::Handle(ic_data.arguments_descriptor());
|
|
const String& target_name = String::Handle(ic_data.target_name());
|
|
target_function =
|
|
InlineCacheMissHelper(receiver, args_descriptor, target_name);
|
|
}
|
|
if (target_function.IsNull()) {
|
|
ASSERT(!FLAG_lazy_dispatchers);
|
|
return target_function.raw();
|
|
}
|
|
if (args.length() == 1) {
|
|
if (ic_data.is_tracking_exactness()) {
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
const auto& receiver = *args[0];
|
|
const auto state = receiver.IsNull()
|
|
? StaticTypeExactnessState::NotExact()
|
|
: StaticTypeExactnessState::Compute(
|
|
Type::Cast(AbstractType::Handle(
|
|
ic_data.receivers_static_type())),
|
|
receiver);
|
|
ic_data.AddReceiverCheck(
|
|
receiver.GetClassId(), target_function, count,
|
|
/*exactness=*/state.CollapseSuperTypeExactness());
|
|
#else
|
|
UNREACHABLE();
|
|
#endif
|
|
} else {
|
|
ic_data.AddReceiverCheck(args[0]->GetClassId(), target_function, count);
|
|
}
|
|
} else {
|
|
GrowableArray<intptr_t> class_ids(args.length());
|
|
ASSERT(ic_data.NumArgsTested() == args.length());
|
|
for (intptr_t i = 0; i < args.length(); i++) {
|
|
class_ids.Add(args[i]->GetClassId());
|
|
}
|
|
ic_data.AddCheck(class_ids, target_function, count);
|
|
}
|
|
if (FLAG_trace_ic_miss_in_optimized || FLAG_trace_ic) {
|
|
DartFrameIterator iterator(Thread::Current(),
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(caller_frame != NULL);
|
|
if (FLAG_trace_ic_miss_in_optimized) {
|
|
const Code& caller = Code::Handle(Code::LookupCode(caller_frame->pc()));
|
|
if (caller.is_optimized()) {
|
|
OS::PrintErr("IC miss in optimized code; call %s -> %s\n",
|
|
Function::Handle(caller.function()).ToCString(),
|
|
target_function.ToCString());
|
|
}
|
|
}
|
|
if (FLAG_trace_ic) {
|
|
OS::PrintErr("InlineCacheMissHandler %" Pd " call at %#" Px
|
|
"' "
|
|
"adding <%s> id:%" Pd " -> <%s>\n",
|
|
args.length(), caller_frame->pc(),
|
|
Class::Handle(receiver.clazz()).ToCString(),
|
|
receiver.GetClassId(), target_function.ToCString());
|
|
}
|
|
}
|
|
|
|
TrySwitchInstanceCall(ic_data, target_function);
|
|
|
|
return target_function.raw();
|
|
}
|
|
|
|
// Handles inline cache misses by updating the IC data array of the call site.
|
|
// Arg0: Receiver object.
|
|
// Arg1: IC data object.
|
|
// Returns: target function with compiled code or null.
|
|
// Modifies the instance call to hold the updated IC data array.
|
|
DEFINE_RUNTIME_ENTRY(InlineCacheMissHandlerOneArg, 2) {
|
|
const Instance& receiver = Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const ICData& ic_data = ICData::CheckedHandle(zone, arguments.ArgAt(1));
|
|
GrowableArray<const Instance*> args(1);
|
|
args.Add(&receiver);
|
|
const Function& result =
|
|
Function::Handle(InlineCacheMissHandler(args, ic_data));
|
|
arguments.SetReturn(result);
|
|
}
|
|
|
|
// Handles inline cache misses by updating the IC data array of the call site.
|
|
// Arg0: Receiver object.
|
|
// Arg1: Argument after receiver.
|
|
// Arg2: IC data object.
|
|
// Returns: target function with compiled code or null.
|
|
// Modifies the instance call to hold the updated IC data array.
|
|
DEFINE_RUNTIME_ENTRY(InlineCacheMissHandlerTwoArgs, 3) {
|
|
const Instance& receiver = Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const Instance& other = Instance::CheckedHandle(zone, arguments.ArgAt(1));
|
|
const ICData& ic_data = ICData::CheckedHandle(zone, arguments.ArgAt(2));
|
|
GrowableArray<const Instance*> args(2);
|
|
args.Add(&receiver);
|
|
args.Add(&other);
|
|
const Function& result =
|
|
Function::Handle(InlineCacheMissHandler(args, ic_data));
|
|
arguments.SetReturn(result);
|
|
}
|
|
|
|
// Handles a static call in unoptimized code that has one argument type not
|
|
// seen before. Compile the target if necessary and update the ICData.
|
|
// Arg0: argument.
|
|
// Arg1: IC data object.
|
|
DEFINE_RUNTIME_ENTRY(StaticCallMissHandlerOneArg, 2) {
|
|
const Instance& arg = Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const ICData& ic_data = ICData::CheckedHandle(zone, arguments.ArgAt(1));
|
|
// IC data for static call is prepopulated with the statically known target.
|
|
ASSERT(ic_data.NumberOfChecksIs(1));
|
|
const Function& target = Function::Handle(ic_data.GetTargetAt(0));
|
|
target.EnsureHasCode();
|
|
ASSERT(!target.IsNull() && target.HasCode());
|
|
ic_data.AddReceiverCheck(arg.GetClassId(), target, 1);
|
|
if (FLAG_trace_ic) {
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(caller_frame != NULL);
|
|
OS::PrintErr("StaticCallMissHandler at %#" Px " target %s (%" Pd ")\n",
|
|
caller_frame->pc(), target.ToCString(), arg.GetClassId());
|
|
}
|
|
arguments.SetReturn(target);
|
|
}
|
|
|
|
// Handles a static call in unoptimized code that has two argument types not
|
|
// seen before. Compile the target if necessary and update the ICData.
|
|
// Arg0: argument 0.
|
|
// Arg1: argument 1.
|
|
// Arg2: IC data object.
|
|
DEFINE_RUNTIME_ENTRY(StaticCallMissHandlerTwoArgs, 3) {
|
|
const Instance& arg0 = Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const Instance& arg1 = Instance::CheckedHandle(zone, arguments.ArgAt(1));
|
|
const ICData& ic_data = ICData::CheckedHandle(zone, arguments.ArgAt(2));
|
|
// IC data for static call is prepopulated with the statically known target.
|
|
ASSERT(!ic_data.NumberOfChecksIs(0));
|
|
const Function& target = Function::Handle(ic_data.GetTargetAt(0));
|
|
target.EnsureHasCode();
|
|
GrowableArray<intptr_t> cids(2);
|
|
cids.Add(arg0.GetClassId());
|
|
cids.Add(arg1.GetClassId());
|
|
ic_data.AddCheck(cids, target);
|
|
if (FLAG_trace_ic) {
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(caller_frame != NULL);
|
|
OS::PrintErr("StaticCallMissHandler at %#" Px " target %s (%" Pd ", %" Pd
|
|
")\n",
|
|
caller_frame->pc(), target.ToCString(), cids[0], cids[1]);
|
|
}
|
|
arguments.SetReturn(target);
|
|
}
|
|
|
|
#if !defined(TARGET_ARCH_DBC)
|
|
static bool IsSingleTarget(Isolate* isolate,
|
|
Zone* zone,
|
|
intptr_t lower_cid,
|
|
intptr_t upper_cid,
|
|
const Function& target,
|
|
const String& name) {
|
|
Class& cls = Class::Handle(zone);
|
|
ClassTable* table = isolate->class_table();
|
|
Function& other_target = Function::Handle(zone);
|
|
for (intptr_t cid = lower_cid; cid <= upper_cid; cid++) {
|
|
if (!table->HasValidClassAt(cid)) continue;
|
|
cls = table->At(cid);
|
|
if (cls.is_abstract()) continue;
|
|
if (!cls.is_allocated()) continue;
|
|
other_target =
|
|
Resolver::ResolveDynamicAnyArgs(zone, cls, name, false /* allow_add */);
|
|
if (other_target.raw() != target.raw()) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
// Handle a miss of a single target cache.
|
|
// Arg1: Receiver.
|
|
// Arg0: Stub out.
|
|
// Returns: the ICData used to continue with a polymorphic call.
|
|
DEFINE_RUNTIME_ENTRY(SingleTargetMiss, 2) {
|
|
#if defined(TARGET_ARCH_DBC)
|
|
// DBC does not use switchable calls.
|
|
UNREACHABLE();
|
|
#else
|
|
const Instance& receiver = Instance::CheckedHandle(zone, arguments.ArgAt(1));
|
|
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(caller_frame->IsDartFrame());
|
|
const Code& caller_code = Code::Handle(zone, caller_frame->LookupDartCode());
|
|
const Function& caller_function =
|
|
Function::Handle(zone, caller_frame->LookupDartFunction());
|
|
|
|
SingleTargetCache& cache = SingleTargetCache::Handle(zone);
|
|
cache ^=
|
|
CodePatcher::GetSwitchableCallDataAt(caller_frame->pc(), caller_code);
|
|
Code& old_target_code = Code::Handle(zone, cache.target());
|
|
Function& old_target = Function::Handle(zone);
|
|
old_target ^= old_target_code.owner();
|
|
|
|
// We lost the original ICData when we patched to the monomorphic case.
|
|
const String& name = String::Handle(zone, old_target.name());
|
|
ASSERT(!old_target.HasOptionalParameters());
|
|
ASSERT(!old_target.IsGeneric());
|
|
const int kTypeArgsLen = 0;
|
|
const Array& descriptor =
|
|
Array::Handle(zone, ArgumentsDescriptor::New(
|
|
kTypeArgsLen, old_target.num_fixed_parameters()));
|
|
const ICData& ic_data =
|
|
ICData::Handle(zone, ICData::New(caller_function, name, descriptor,
|
|
DeoptId::kNone, 1, /* args_tested */
|
|
ICData::kInstance));
|
|
|
|
// Maybe add the new target.
|
|
Class& cls = Class::Handle(zone, receiver.clazz());
|
|
ArgumentsDescriptor args_desc(descriptor);
|
|
Function& target_function = Function::Handle(
|
|
zone, Resolver::ResolveDynamicForReceiverClass(cls, name, args_desc));
|
|
if (target_function.IsNull()) {
|
|
target_function = InlineCacheMissHelper(receiver, descriptor, name);
|
|
}
|
|
if (target_function.IsNull()) {
|
|
ASSERT(!FLAG_lazy_dispatchers);
|
|
} else {
|
|
ic_data.AddReceiverCheck(receiver.GetClassId(), target_function);
|
|
}
|
|
|
|
if (old_target.raw() == target_function.raw()) {
|
|
intptr_t lower, upper, unchecked_lower, unchecked_upper;
|
|
if (receiver.GetClassId() < cache.lower_limit()) {
|
|
lower = receiver.GetClassId();
|
|
unchecked_lower = receiver.GetClassId();
|
|
upper = cache.upper_limit();
|
|
unchecked_upper = cache.lower_limit() - 1;
|
|
} else {
|
|
lower = cache.lower_limit();
|
|
unchecked_lower = cache.upper_limit() + 1;
|
|
upper = receiver.GetClassId();
|
|
unchecked_upper = receiver.GetClassId();
|
|
}
|
|
|
|
if (IsSingleTarget(isolate, zone, unchecked_lower, unchecked_upper,
|
|
target_function, name)) {
|
|
cache.set_lower_limit(lower);
|
|
cache.set_upper_limit(upper);
|
|
// Return the ICData. The single target stub will jump to continue in the
|
|
// IC call stub.
|
|
arguments.SetArgAt(0, StubCode::ICCallThroughCode());
|
|
arguments.SetReturn(ic_data);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Call site is not single target, switch to call using ICData.
|
|
const Code& stub = StubCode::ICCallThroughCode();
|
|
ASSERT(!Isolate::Current()->compilation_allowed());
|
|
CodePatcher::PatchSwitchableCallAt(caller_frame->pc(), caller_code, ic_data,
|
|
stub);
|
|
|
|
// Return the ICData. The single target stub will jump to continue in the
|
|
// IC call stub.
|
|
arguments.SetArgAt(0, stub);
|
|
arguments.SetReturn(ic_data);
|
|
#endif
|
|
}
|
|
|
|
// Handle the first use of an instance call
|
|
// Arg2: UnlinkedCall.
|
|
// Arg1: Receiver.
|
|
// Arg0: Stub out.
|
|
// Returns: the ICData used to continue with a polymorphic call.
|
|
DEFINE_RUNTIME_ENTRY(UnlinkedCall, 3) {
|
|
#if defined(TARGET_ARCH_DBC)
|
|
// DBC does not use switchable calls.
|
|
UNREACHABLE();
|
|
#else
|
|
const Instance& receiver = Instance::CheckedHandle(zone, arguments.ArgAt(1));
|
|
const UnlinkedCall& unlinked =
|
|
UnlinkedCall::CheckedHandle(zone, arguments.ArgAt(2));
|
|
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(caller_frame->IsDartFrame());
|
|
const Code& caller_code = Code::Handle(zone, caller_frame->LookupDartCode());
|
|
const Function& caller_function =
|
|
Function::Handle(zone, caller_frame->LookupDartFunction());
|
|
|
|
const String& name = String::Handle(zone, unlinked.target_name());
|
|
const Array& descriptor = Array::Handle(zone, unlinked.args_descriptor());
|
|
const ICData& ic_data =
|
|
ICData::Handle(zone, ICData::New(caller_function, name, descriptor,
|
|
DeoptId::kNone, 1, /* args_tested */
|
|
ICData::kInstance));
|
|
|
|
Class& cls = Class::Handle(zone, receiver.clazz());
|
|
ArgumentsDescriptor args_desc(descriptor);
|
|
Function& target_function = Function::Handle(
|
|
zone, Resolver::ResolveDynamicForReceiverClass(cls, name, args_desc));
|
|
if (target_function.IsNull()) {
|
|
target_function = InlineCacheMissHelper(receiver, descriptor, name);
|
|
}
|
|
if (target_function.IsNull()) {
|
|
ASSERT(!FLAG_lazy_dispatchers);
|
|
} else {
|
|
ic_data.AddReceiverCheck(receiver.GetClassId(), target_function);
|
|
}
|
|
|
|
if (!target_function.IsNull() && !target_function.HasOptionalParameters() &&
|
|
!target_function.IsGeneric()) {
|
|
// Patch to monomorphic call.
|
|
ASSERT(target_function.HasCode());
|
|
const Code& target_code = Code::Handle(zone, target_function.CurrentCode());
|
|
const Smi& expected_cid =
|
|
Smi::Handle(zone, Smi::New(receiver.GetClassId()));
|
|
CodePatcher::PatchSwitchableCallAt(caller_frame->pc(), caller_code,
|
|
expected_cid, target_code);
|
|
|
|
// Return the ICData. The miss stub will jump to continue in the IC call
|
|
// stub.
|
|
arguments.SetArgAt(0, StubCode::ICCallThroughCode());
|
|
arguments.SetReturn(ic_data);
|
|
return;
|
|
}
|
|
|
|
// Patch to call through stub.
|
|
const Code& stub = StubCode::ICCallThroughCode();
|
|
ASSERT(!Isolate::Current()->compilation_allowed());
|
|
CodePatcher::PatchSwitchableCallAt(caller_frame->pc(), caller_code, ic_data,
|
|
stub);
|
|
|
|
// Return the ICData. The miss stub will jump to continue in the IC lookup
|
|
// stub.
|
|
arguments.SetArgAt(0, stub);
|
|
arguments.SetReturn(ic_data);
|
|
#endif // !DBC
|
|
}
|
|
|
|
#if !defined(DART_PRECOMPILED_RUNTIME) && !defined(TARGET_ARCH_DBC)
|
|
static RawICData* FindICDataForInstanceCall(Zone* zone,
|
|
const Code& code,
|
|
uword pc) {
|
|
uword pc_offset = pc - code.PayloadStart();
|
|
const PcDescriptors& descriptors =
|
|
PcDescriptors::Handle(zone, code.pc_descriptors());
|
|
PcDescriptors::Iterator iter(descriptors, RawPcDescriptors::kIcCall);
|
|
intptr_t deopt_id = -1;
|
|
while (iter.MoveNext()) {
|
|
if (iter.PcOffset() == pc_offset) {
|
|
deopt_id = iter.DeoptId();
|
|
break;
|
|
}
|
|
}
|
|
ASSERT(deopt_id != -1);
|
|
return Function::Handle(zone, code.function()).FindICData(deopt_id);
|
|
}
|
|
#endif // !defined(DART_PRECOMPILED_RUNTIME) && !defined(TARGET_ARCH_DBC)
|
|
|
|
// Handle a miss of a megamorphic cache.
|
|
// Arg1: Receiver.
|
|
// Arg0: continuation Code (out parameter).
|
|
// Returns: the ICData used to continue with a polymorphic call.
|
|
DEFINE_RUNTIME_ENTRY(MonomorphicMiss, 2) {
|
|
#if defined(TARGET_ARCH_DBC)
|
|
// DBC does not use switchable calls.
|
|
UNREACHABLE();
|
|
#elif defined(DART_PRECOMPILED_RUNTIME)
|
|
const Instance& receiver = Instance::CheckedHandle(zone, arguments.ArgAt(1));
|
|
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(caller_frame->IsDartFrame());
|
|
const Code& caller_code = Code::Handle(zone, caller_frame->LookupDartCode());
|
|
const Function& caller_function =
|
|
Function::Handle(zone, caller_frame->LookupDartFunction());
|
|
|
|
Smi& old_expected_cid = Smi::Handle(zone);
|
|
old_expected_cid ^=
|
|
CodePatcher::GetSwitchableCallDataAt(caller_frame->pc(), caller_code);
|
|
const Code& old_target_code = Code::Handle(
|
|
CodePatcher::GetSwitchableCallTargetAt(caller_frame->pc(), caller_code));
|
|
Function& old_target = Function::Handle(zone);
|
|
old_target ^= old_target_code.owner();
|
|
|
|
// We lost the original ICData when we patched to the monomorphic case.
|
|
const String& name = String::Handle(zone, old_target.name());
|
|
ASSERT(!old_target.HasOptionalParameters());
|
|
const int kTypeArgsLen = 0;
|
|
const Array& descriptor =
|
|
Array::Handle(zone, ArgumentsDescriptor::New(
|
|
kTypeArgsLen, old_target.num_fixed_parameters()));
|
|
const ICData& ic_data =
|
|
ICData::Handle(zone, ICData::New(caller_function, name, descriptor,
|
|
DeoptId::kNone, 1, /* args_tested */
|
|
ICData::kInstance));
|
|
|
|
// Add the first target.
|
|
ic_data.AddReceiverCheck(old_expected_cid.Value(), old_target);
|
|
|
|
// Maybe add the new target.
|
|
Class& cls = Class::Handle(zone, receiver.clazz());
|
|
ArgumentsDescriptor args_desc(descriptor);
|
|
Function& target_function = Function::Handle(
|
|
zone, Resolver::ResolveDynamicForReceiverClass(cls, name, args_desc));
|
|
if (target_function.IsNull()) {
|
|
target_function = InlineCacheMissHelper(receiver, descriptor, name);
|
|
}
|
|
if (target_function.IsNull()) {
|
|
ASSERT(!FLAG_lazy_dispatchers);
|
|
} else {
|
|
ic_data.AddReceiverCheck(receiver.GetClassId(), target_function);
|
|
}
|
|
|
|
if (old_target.raw() == target_function.raw()) {
|
|
intptr_t lower, upper;
|
|
if (old_expected_cid.Value() < receiver.GetClassId()) {
|
|
lower = old_expected_cid.Value();
|
|
upper = receiver.GetClassId();
|
|
} else {
|
|
lower = receiver.GetClassId();
|
|
upper = old_expected_cid.Value();
|
|
}
|
|
|
|
if (IsSingleTarget(isolate, zone, lower, upper, target_function, name)) {
|
|
const SingleTargetCache& cache =
|
|
SingleTargetCache::Handle(SingleTargetCache::New());
|
|
const Code& code = Code::Handle(target_function.CurrentCode());
|
|
cache.set_target(code);
|
|
cache.set_entry_point(code.EntryPoint());
|
|
cache.set_lower_limit(lower);
|
|
cache.set_upper_limit(upper);
|
|
const Code& stub = StubCode::SingleTargetCall();
|
|
CodePatcher::PatchSwitchableCallAt(caller_frame->pc(), caller_code, cache,
|
|
stub);
|
|
// Return the ICData. The miss stub will jump to continue in the IC call
|
|
// stub.
|
|
arguments.SetArgAt(0, StubCode::ICCallThroughCode());
|
|
arguments.SetReturn(ic_data);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Patch to call through stub.
|
|
const Code& stub = StubCode::ICCallThroughCode();
|
|
ASSERT(!Isolate::Current()->compilation_allowed());
|
|
CodePatcher::PatchSwitchableCallAt(caller_frame->pc(), caller_code, ic_data,
|
|
stub);
|
|
|
|
// Return the ICData. The miss stub will jump to continue in the IC lookup
|
|
// stub.
|
|
arguments.SetArgAt(0, stub);
|
|
arguments.SetReturn(ic_data);
|
|
#else // JIT
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(caller_frame->IsDartFrame());
|
|
ASSERT(!caller_frame->is_interpreted());
|
|
const Code& caller_code = Code::Handle(zone, caller_frame->LookupDartCode());
|
|
ASSERT(!caller_code.is_optimized());
|
|
|
|
const ICData& ic_data = ICData::Handle(
|
|
zone, FindICDataForInstanceCall(zone, caller_code, caller_frame->pc()));
|
|
RELEASE_ASSERT(!ic_data.IsNull());
|
|
|
|
ASSERT(ic_data.NumArgsTested() == 1);
|
|
const Code& stub = ic_data.is_tracking_exactness()
|
|
? StubCode::OneArgCheckInlineCacheWithExactnessCheck()
|
|
: StubCode::OneArgCheckInlineCache();
|
|
CodePatcher::PatchInstanceCallAt(caller_frame->pc(), caller_code, ic_data,
|
|
stub);
|
|
if (FLAG_trace_ic) {
|
|
OS::PrintErr("Instance call at %" Px
|
|
" switching to polymorphic dispatch, %s\n",
|
|
caller_frame->pc(), ic_data.ToCString());
|
|
}
|
|
|
|
const Instance& receiver = Instance::CheckedHandle(zone, arguments.ArgAt(1));
|
|
// ICData can be shared between unoptimized and optimized code, so beware that
|
|
// the new receiver class may have already been added through the optimized
|
|
// code.
|
|
if (!ic_data.HasReceiverClassId(receiver.GetClassId())) {
|
|
GrowableArray<const Instance*> args(1);
|
|
args.Add(&receiver);
|
|
// Don't count during insertion because the IC stub we continue through will
|
|
// do an increment.
|
|
intptr_t count = 0;
|
|
InlineCacheMissHandler(args, ic_data, count);
|
|
}
|
|
arguments.SetArgAt(0, stub);
|
|
arguments.SetReturn(ic_data);
|
|
#endif // !defined(TARGET_ARCH_DBC)
|
|
}
|
|
|
|
// Handle a miss of a megamorphic cache.
|
|
// Arg0: Receiver.
|
|
// Arg1: ICData or MegamorphicCache.
|
|
// Arg2: Arguments descriptor array.
|
|
// Returns: target function to call.
|
|
DEFINE_RUNTIME_ENTRY(MegamorphicCacheMissHandler, 3) {
|
|
#if defined(TARGET_ARCH_DBC)
|
|
// DBC does not use megamorphic calls right now.
|
|
UNREACHABLE();
|
|
#else
|
|
const Instance& receiver = Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const Object& ic_data_or_cache = Object::Handle(zone, arguments.ArgAt(1));
|
|
const Array& descriptor = Array::CheckedHandle(zone, arguments.ArgAt(2));
|
|
String& name = String::Handle(zone);
|
|
if (ic_data_or_cache.IsICData()) {
|
|
name = ICData::Cast(ic_data_or_cache).target_name();
|
|
} else {
|
|
ASSERT(ic_data_or_cache.IsMegamorphicCache());
|
|
name = MegamorphicCache::Cast(ic_data_or_cache).target_name();
|
|
}
|
|
Class& cls = Class::Handle(zone, receiver.clazz());
|
|
ASSERT(!cls.IsNull());
|
|
ArgumentsDescriptor args_desc(descriptor);
|
|
if (FLAG_trace_ic || FLAG_trace_ic_miss_in_optimized) {
|
|
OS::PrintErr("Megamorphic IC miss (%s), class=%s, function<%" Pd ">=%s\n",
|
|
ic_data_or_cache.IsICData() ? "icdata" : "cache",
|
|
cls.ToCString(), args_desc.TypeArgsLen(), name.ToCString());
|
|
}
|
|
Function& target_function = Function::Handle(
|
|
zone, Resolver::ResolveDynamicForReceiverClass(cls, name, args_desc));
|
|
if (target_function.IsNull()) {
|
|
target_function = InlineCacheMissHelper(receiver, descriptor, name);
|
|
if (target_function.IsNull()) {
|
|
ASSERT(!FLAG_lazy_dispatchers);
|
|
arguments.SetReturn(target_function);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (ic_data_or_cache.IsICData()) {
|
|
const ICData& ic_data = ICData::Cast(ic_data_or_cache);
|
|
const intptr_t number_of_checks = ic_data.NumberOfChecks();
|
|
|
|
if ((number_of_checks == 0) && !target_function.HasOptionalParameters() &&
|
|
!target_function.IsGeneric() &&
|
|
!Isolate::Current()->compilation_allowed()) {
|
|
// This call site is unlinked: transition to a monomorphic direct call.
|
|
// Note we cannot do this if the target has optional parameters because
|
|
// the monomorphic direct call does not load the arguments descriptor.
|
|
// We cannot do this if we are still in the middle of precompiling because
|
|
// the monomorphic case hides a live instance selector from the
|
|
// treeshaker.
|
|
|
|
const Code& target_code =
|
|
Code::Handle(zone, target_function.EnsureHasCode());
|
|
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* miss_function_frame = iterator.NextFrame();
|
|
ASSERT(miss_function_frame->IsDartFrame());
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(caller_frame->IsDartFrame());
|
|
const Code& caller_code =
|
|
Code::Handle(zone, caller_frame->LookupDartCode());
|
|
const Smi& expected_cid =
|
|
Smi::Handle(zone, Smi::New(receiver.GetClassId()));
|
|
|
|
CodePatcher::PatchSwitchableCallAt(caller_frame->pc(), caller_code,
|
|
expected_cid, target_code);
|
|
} else {
|
|
ic_data.AddReceiverCheck(receiver.GetClassId(), target_function);
|
|
if (number_of_checks > FLAG_max_polymorphic_checks) {
|
|
// Switch to megamorphic call.
|
|
const MegamorphicCache& cache = MegamorphicCache::Handle(
|
|
zone, MegamorphicCacheTable::Lookup(thread, name, descriptor));
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* miss_function_frame = iterator.NextFrame();
|
|
ASSERT(miss_function_frame->IsDartFrame());
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(caller_frame->IsDartFrame());
|
|
const Code& caller_code =
|
|
Code::Handle(zone, caller_frame->LookupDartCode());
|
|
const Code& stub = StubCode::MegamorphicCall();
|
|
|
|
CodePatcher::PatchSwitchableCallAt(caller_frame->pc(), caller_code,
|
|
cache, stub);
|
|
}
|
|
}
|
|
} else {
|
|
const MegamorphicCache& cache = MegamorphicCache::Cast(ic_data_or_cache);
|
|
// Insert function found into cache and return it.
|
|
const Smi& class_id = Smi::Handle(zone, Smi::New(cls.id()));
|
|
cache.Insert(class_id, target_function);
|
|
}
|
|
arguments.SetReturn(target_function);
|
|
#endif // !defined(TARGET_ARCH_DBC)
|
|
}
|
|
|
|
// Handles interpreted interface call cache miss.
|
|
// Arg0: receiver
|
|
// Arg1: target name
|
|
// Arg2: arguments descriptor
|
|
// Returns: target function
|
|
// Modifies the instance call table in current interpreter.
|
|
DEFINE_RUNTIME_ENTRY(InterpretedInstanceCallMissHandler, 3) {
|
|
#if defined(DART_PRECOMPILED_RUNTIME)
|
|
UNREACHABLE();
|
|
#else
|
|
ASSERT(FLAG_enable_interpreter);
|
|
const Instance& receiver = Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const String& target_name = String::CheckedHandle(zone, arguments.ArgAt(1));
|
|
const Array& arg_desc = Array::CheckedHandle(zone, arguments.ArgAt(2));
|
|
|
|
ArgumentsDescriptor arguments_descriptor(arg_desc);
|
|
Function& target_function = Function::Handle(
|
|
zone,
|
|
Resolver::ResolveDynamic(receiver, target_name, arguments_descriptor));
|
|
|
|
// TODO(regis): In order to substitute 'simple_instance_of_function', the 2nd
|
|
// arg to the call, the type, is needed.
|
|
|
|
if (target_function.IsNull()) {
|
|
target_function = InlineCacheMissHelper(receiver, arg_desc, target_name);
|
|
}
|
|
ASSERT(!target_function.IsNull());
|
|
arguments.SetReturn(target_function);
|
|
#endif
|
|
}
|
|
|
|
// Invoke appropriate noSuchMethod or closure from getter.
|
|
// Arg0: receiver
|
|
// Arg1: ICData or MegamorphicCache
|
|
// Arg2: arguments descriptor array
|
|
// Arg3: arguments array
|
|
DEFINE_RUNTIME_ENTRY(NoSuchMethodFromCallStub, 4) {
|
|
ASSERT(!FLAG_lazy_dispatchers);
|
|
const Instance& receiver = Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const Object& ic_data_or_cache = Object::Handle(zone, arguments.ArgAt(1));
|
|
const Array& orig_arguments_desc =
|
|
Array::CheckedHandle(zone, arguments.ArgAt(2));
|
|
const Array& orig_arguments = Array::CheckedHandle(zone, arguments.ArgAt(3));
|
|
String& target_name = String::Handle(zone);
|
|
if (ic_data_or_cache.IsICData()) {
|
|
target_name = ICData::Cast(ic_data_or_cache).target_name();
|
|
} else {
|
|
ASSERT(ic_data_or_cache.IsMegamorphicCache());
|
|
target_name = MegamorphicCache::Cast(ic_data_or_cache).target_name();
|
|
}
|
|
|
|
if (Function::IsDynamicInvocationForwarderName(target_name)) {
|
|
target_name = Function::DemangleDynamicInvocationForwarderName(target_name);
|
|
}
|
|
|
|
Class& cls = Class::Handle(zone, receiver.clazz());
|
|
Function& function = Function::Handle(zone);
|
|
|
|
// Dart distinguishes getters and regular methods and allows their calls
|
|
// to mix with conversions, and its selectors are independent of arity. So do
|
|
// a zigzagged lookup to see if this call failed because of an arity mismatch,
|
|
// need for conversion, or there really is no such method.
|
|
|
|
#define NO_SUCH_METHOD() \
|
|
const Object& result = Object::Handle( \
|
|
zone, DartEntry::InvokeNoSuchMethod( \
|
|
receiver, target_name, orig_arguments, orig_arguments_desc)); \
|
|
ThrowIfError(result); \
|
|
arguments.SetReturn(result);
|
|
|
|
#define CLOSURIZE(some_function) \
|
|
const Function& closure_function = \
|
|
Function::Handle(zone, some_function.ImplicitClosureFunction()); \
|
|
const Object& result = Object::Handle( \
|
|
zone, closure_function.ImplicitInstanceClosure(receiver)); \
|
|
arguments.SetReturn(result);
|
|
|
|
const bool is_getter = Field::IsGetterName(target_name);
|
|
if (is_getter) {
|
|
// o.foo (o.get:foo) failed, closurize o.foo() if it exists.
|
|
String& field_name =
|
|
String::Handle(zone, Field::NameFromGetter(target_name));
|
|
while (!cls.IsNull()) {
|
|
function = cls.LookupDynamicFunction(field_name);
|
|
if (!function.IsNull()) {
|
|
CLOSURIZE(function);
|
|
return;
|
|
}
|
|
cls = cls.SuperClass();
|
|
}
|
|
|
|
// Fall through for noSuchMethod
|
|
} else {
|
|
// o.foo(...) failed, invoke noSuchMethod is foo exists but has the wrong
|
|
// number of arguments, or try (o.foo).call(...)
|
|
|
|
if ((target_name.raw() == Symbols::Call().raw()) && receiver.IsClosure()) {
|
|
// Special case: closures are implemented with a call getter instead of a
|
|
// call method and with lazy dispatchers the field-invocation-dispatcher
|
|
// would perform the closure call.
|
|
const Object& result = Object::Handle(
|
|
zone, DartEntry::InvokeClosure(orig_arguments, orig_arguments_desc));
|
|
ThrowIfError(result);
|
|
arguments.SetReturn(result);
|
|
return;
|
|
}
|
|
|
|
const String& getter_name =
|
|
String::Handle(zone, Field::GetterName(target_name));
|
|
ArgumentsDescriptor args_desc(orig_arguments_desc);
|
|
while (!cls.IsNull()) {
|
|
function = cls.LookupDynamicFunction(target_name);
|
|
if (!function.IsNull()) {
|
|
ASSERT(!function.AreValidArguments(args_desc, NULL));
|
|
break; // mismatch, invoke noSuchMethod
|
|
}
|
|
function = cls.LookupDynamicFunction(getter_name);
|
|
if (!function.IsNull()) {
|
|
const Array& getter_arguments = Array::Handle(Array::New(1));
|
|
getter_arguments.SetAt(0, receiver);
|
|
const Object& getter_result = Object::Handle(
|
|
zone, DartEntry::InvokeFunction(function, getter_arguments));
|
|
ThrowIfError(getter_result);
|
|
ASSERT(getter_result.IsNull() || getter_result.IsInstance());
|
|
|
|
orig_arguments.SetAt(args_desc.FirstArgIndex(), getter_result);
|
|
const Object& call_result = Object::Handle(
|
|
zone,
|
|
DartEntry::InvokeClosure(orig_arguments, orig_arguments_desc));
|
|
ThrowIfError(call_result);
|
|
arguments.SetReturn(call_result);
|
|
return;
|
|
}
|
|
cls = cls.SuperClass();
|
|
}
|
|
}
|
|
|
|
NO_SUCH_METHOD();
|
|
|
|
#undef NO_SUCH_METHOD
|
|
#undef CLOSURIZE
|
|
}
|
|
|
|
// Invoke appropriate noSuchMethod function.
|
|
// Arg0: receiver
|
|
// Arg1: function
|
|
// Arg1: arguments descriptor array.
|
|
// Arg3: arguments array.
|
|
DEFINE_RUNTIME_ENTRY(NoSuchMethodFromPrologue, 4) {
|
|
const Instance& receiver = Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const Function& function = Function::CheckedHandle(zone, arguments.ArgAt(1));
|
|
const Array& orig_arguments_desc =
|
|
Array::CheckedHandle(zone, arguments.ArgAt(2));
|
|
const Array& orig_arguments = Array::CheckedHandle(zone, arguments.ArgAt(3));
|
|
|
|
String& orig_function_name = String::Handle(zone);
|
|
if ((function.kind() == RawFunction::kClosureFunction) ||
|
|
(function.kind() == RawFunction::kImplicitClosureFunction)) {
|
|
// For closure the function name is always 'call'. Replace it with the
|
|
// name of the closurized function so that exception contains more
|
|
// relevant information.
|
|
orig_function_name = function.QualifiedUserVisibleName();
|
|
} else {
|
|
orig_function_name = function.name();
|
|
}
|
|
|
|
const Object& result = Object::Handle(
|
|
zone, DartEntry::InvokeNoSuchMethod(receiver, orig_function_name,
|
|
orig_arguments, orig_arguments_desc));
|
|
ThrowIfError(result);
|
|
arguments.SetReturn(result);
|
|
}
|
|
|
|
// Invoke appropriate noSuchMethod function.
|
|
// Arg0: receiver
|
|
// Arg1: arguments descriptor array.
|
|
// Arg2: arguments array.
|
|
// Arg3: function name.
|
|
DEFINE_RUNTIME_ENTRY(InvokeNoSuchMethod, 4) {
|
|
ASSERT(FLAG_enable_interpreter);
|
|
const Instance& receiver = Instance::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const Array& orig_arguments_desc =
|
|
Array::CheckedHandle(zone, arguments.ArgAt(1));
|
|
const Array& orig_arguments = Array::CheckedHandle(zone, arguments.ArgAt(2));
|
|
const String& original_function_name =
|
|
String::CheckedHandle(zone, arguments.ArgAt(3));
|
|
|
|
const Object& result = Object::Handle(DartEntry::InvokeNoSuchMethod(
|
|
receiver, original_function_name, orig_arguments, orig_arguments_desc));
|
|
ThrowIfError(result);
|
|
arguments.SetReturn(result);
|
|
}
|
|
|
|
#if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
// The following code is used to stress test
|
|
// - deoptimization
|
|
// - debugger stack tracing
|
|
// - garbage collection
|
|
// - hot reload
|
|
static void HandleStackOverflowTestCases(Thread* thread) {
|
|
Isolate* isolate = thread->isolate();
|
|
|
|
if (FLAG_shared_slow_path_triggers_gc) {
|
|
isolate->heap()->CollectAllGarbage();
|
|
}
|
|
|
|
bool do_deopt = false;
|
|
bool do_stacktrace = false;
|
|
bool do_reload = false;
|
|
bool do_gc = false;
|
|
const intptr_t isolate_reload_every =
|
|
isolate->reload_every_n_stack_overflow_checks();
|
|
if ((FLAG_deoptimize_every > 0) || (FLAG_stacktrace_every > 0) ||
|
|
(FLAG_gc_every > 0) || (isolate_reload_every > 0)) {
|
|
if (!Isolate::IsVMInternalIsolate(isolate)) {
|
|
// TODO(turnidge): To make --deoptimize_every and
|
|
// --stacktrace-every faster we could move this increment/test to
|
|
// the generated code.
|
|
int32_t count = thread->IncrementAndGetStackOverflowCount();
|
|
if (FLAG_deoptimize_every > 0 && (count % FLAG_deoptimize_every) == 0) {
|
|
do_deopt = true;
|
|
}
|
|
if (FLAG_stacktrace_every > 0 && (count % FLAG_stacktrace_every) == 0) {
|
|
do_stacktrace = true;
|
|
}
|
|
if (FLAG_gc_every > 0 && (count % FLAG_gc_every) == 0) {
|
|
do_gc = true;
|
|
}
|
|
if ((isolate_reload_every > 0) && (count % isolate_reload_every) == 0) {
|
|
do_reload = isolate->CanReload();
|
|
}
|
|
}
|
|
}
|
|
if (FLAG_deoptimize_filter != nullptr || FLAG_stacktrace_filter != nullptr ||
|
|
(FLAG_reload_every != 0)) {
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* frame = iterator.NextFrame();
|
|
ASSERT(frame != nullptr);
|
|
Code& code = Code::Handle();
|
|
Function& function = Function::Handle();
|
|
if (frame->is_interpreted()) {
|
|
function = frame->LookupDartFunction();
|
|
} else {
|
|
code = frame->LookupDartCode();
|
|
ASSERT(!code.IsNull());
|
|
function = code.function();
|
|
}
|
|
ASSERT(!function.IsNull());
|
|
const char* function_name = function.ToFullyQualifiedCString();
|
|
ASSERT(function_name != nullptr);
|
|
if (!code.IsNull()) {
|
|
if (!code.is_optimized() && FLAG_reload_every_optimized) {
|
|
// Don't do the reload if we aren't inside optimized code.
|
|
do_reload = false;
|
|
}
|
|
if (code.is_optimized() && FLAG_deoptimize_filter != nullptr &&
|
|
strstr(function_name, FLAG_deoptimize_filter) != nullptr &&
|
|
!function.ForceOptimize()) {
|
|
OS::PrintErr("*** Forcing deoptimization (%s)\n",
|
|
function.ToFullyQualifiedCString());
|
|
do_deopt = true;
|
|
}
|
|
}
|
|
if (FLAG_stacktrace_filter != nullptr &&
|
|
strstr(function_name, FLAG_stacktrace_filter) != nullptr) {
|
|
OS::PrintErr("*** Computing stacktrace (%s)\n",
|
|
function.ToFullyQualifiedCString());
|
|
do_stacktrace = true;
|
|
}
|
|
}
|
|
if (do_deopt) {
|
|
// TODO(turnidge): Consider using DeoptimizeAt instead.
|
|
DeoptimizeFunctionsOnStack();
|
|
}
|
|
if (do_reload) {
|
|
JSONStream js;
|
|
// Maybe adjust the rate of future reloads.
|
|
isolate->MaybeIncreaseReloadEveryNStackOverflowChecks();
|
|
|
|
const char* script_uri;
|
|
{
|
|
NoReloadScope no_reload(isolate, thread);
|
|
const Library& lib =
|
|
Library::Handle(isolate->object_store()->_internal_library());
|
|
const Class& cls = Class::Handle(
|
|
lib.LookupClass(String::Handle(String::New("VMLibraryHooks"))));
|
|
const Function& func = Function::Handle(cls.LookupFunction(
|
|
String::Handle(String::New("get:platformScript"))));
|
|
Object& result = Object::Handle(
|
|
DartEntry::InvokeFunction(func, Object::empty_array()));
|
|
if (result.IsUnwindError()) {
|
|
Exceptions::PropagateError(Error::Cast(result));
|
|
}
|
|
if (!result.IsInstance()) {
|
|
FATAL1("Bad script uri hook: %s", result.ToCString());
|
|
}
|
|
result = DartLibraryCalls::ToString(Instance::Cast(result));
|
|
if (result.IsUnwindError()) {
|
|
Exceptions::PropagateError(Error::Cast(result));
|
|
}
|
|
if (!result.IsString()) {
|
|
FATAL1("Bad script uri hook: %s", result.ToCString());
|
|
}
|
|
script_uri = result.ToCString(); // Zone allocated.
|
|
}
|
|
|
|
// Issue a reload.
|
|
bool success =
|
|
isolate->ReloadSources(&js, true /* force_reload */, script_uri);
|
|
if (!success) {
|
|
FATAL1("*** Isolate reload failed:\n%s\n", js.ToCString());
|
|
}
|
|
}
|
|
if (do_stacktrace) {
|
|
String& var_name = String::Handle();
|
|
Instance& var_value = Instance::Handle();
|
|
// Collecting the stack trace and accessing local variables
|
|
// of frames may trigger parsing of functions to compute
|
|
// variable descriptors of functions. Parsing may trigger
|
|
// code execution, e.g. to compute compile-time constants. Thus,
|
|
// disable FLAG_stacktrace_every during trace collection to prevent
|
|
// recursive stack trace collection.
|
|
intptr_t saved_stacktrace_every = FLAG_stacktrace_every;
|
|
FLAG_stacktrace_every = 0;
|
|
DebuggerStackTrace* stack = isolate->debugger()->StackTrace();
|
|
intptr_t num_frames = stack->Length();
|
|
for (intptr_t i = 0; i < num_frames; i++) {
|
|
ActivationFrame* frame = stack->FrameAt(i);
|
|
int num_vars = 0;
|
|
// Variable locations and number are unknown when precompiling.
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
// NumLocalVariables() can call EnsureHasUnoptimizedCode() for
|
|
// non-interpreted functions.
|
|
if (!frame->function().ForceOptimize()) {
|
|
if (!frame->IsInterpreted()) {
|
|
// Ensure that we have unoptimized code.
|
|
frame->function().EnsureHasCompiledUnoptimizedCode();
|
|
}
|
|
num_vars = frame->NumLocalVariables();
|
|
}
|
|
#endif
|
|
TokenPosition unused = TokenPosition::kNoSource;
|
|
for (intptr_t v = 0; v < num_vars; v++) {
|
|
frame->VariableAt(v, &var_name, &unused, &unused, &unused, &var_value);
|
|
}
|
|
}
|
|
if (FLAG_stress_async_stacks) {
|
|
isolate->debugger()->CollectAwaiterReturnStackTrace();
|
|
}
|
|
FLAG_stacktrace_every = saved_stacktrace_every;
|
|
}
|
|
if (do_gc) {
|
|
isolate->heap()->CollectAllGarbage(Heap::kDebugging);
|
|
}
|
|
}
|
|
#endif // !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
static void HandleOSRRequest(Thread* thread) {
|
|
Isolate* isolate = thread->isolate();
|
|
ASSERT(isolate->use_osr());
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* frame = iterator.NextFrame();
|
|
ASSERT(frame != NULL);
|
|
const Code& code = Code::ZoneHandle(frame->LookupDartCode());
|
|
ASSERT(!code.IsNull());
|
|
ASSERT(!code.is_optimized());
|
|
const Function& function = Function::Handle(code.function());
|
|
ASSERT(!function.IsNull());
|
|
|
|
// If the code of the frame does not match the function's unoptimized code,
|
|
// we bail out since the code was reset by an isolate reload.
|
|
if (code.raw() != function.unoptimized_code()) {
|
|
return;
|
|
}
|
|
|
|
// Since the code is referenced from the frame and the ZoneHandle,
|
|
// it cannot have been removed from the function.
|
|
ASSERT(function.HasCode());
|
|
// Don't do OSR on intrinsified functions: The intrinsic code expects to be
|
|
// called like a regular function and can't be entered via OSR.
|
|
if (!Compiler::CanOptimizeFunction(thread, function) ||
|
|
function.is_intrinsic()) {
|
|
return;
|
|
}
|
|
|
|
// The unoptimized code is on the stack and should never be detached from
|
|
// the function at this point.
|
|
ASSERT(function.unoptimized_code() != Object::null());
|
|
intptr_t osr_id =
|
|
Code::Handle(function.unoptimized_code()).GetDeoptIdForOsr(frame->pc());
|
|
ASSERT(osr_id != Compiler::kNoOSRDeoptId);
|
|
if (FLAG_trace_osr) {
|
|
OS::PrintErr("Attempting OSR for %s at id=%" Pd ", count=%" Pd "\n",
|
|
function.ToFullyQualifiedCString(), osr_id,
|
|
function.usage_counter());
|
|
}
|
|
|
|
// Since the code is referenced from the frame and the ZoneHandle,
|
|
// it cannot have been removed from the function.
|
|
const Object& result = Object::Handle(
|
|
Compiler::CompileOptimizedFunction(thread, function, osr_id));
|
|
ThrowIfError(result);
|
|
|
|
if (!result.IsNull()) {
|
|
const Code& code = Code::Cast(result);
|
|
uword optimized_entry = Instructions::EntryPoint(code.instructions());
|
|
frame->set_pc(optimized_entry);
|
|
frame->set_pc_marker(code.raw());
|
|
}
|
|
}
|
|
#endif // !defined(DART_PRECOMPILED_RUNTIME)
|
|
|
|
DEFINE_RUNTIME_ENTRY(StackOverflow, 0) {
|
|
#if defined(USING_SIMULATOR)
|
|
uword stack_pos = Simulator::Current()->get_sp();
|
|
// If simulator was never called (for example, in pure
|
|
// interpreted mode) it may return 0 as a value of SPREG.
|
|
if (stack_pos == 0) {
|
|
// Use any reasonable value which would not be treated
|
|
// as stack overflow.
|
|
stack_pos = thread->saved_stack_limit();
|
|
}
|
|
#else
|
|
uword stack_pos = OSThread::GetCurrentStackPointer();
|
|
#endif
|
|
// Always clear the stack overflow flags. They are meant for this
|
|
// particular stack overflow runtime call and are not meant to
|
|
// persist.
|
|
uword stack_overflow_flags = thread->GetAndClearStackOverflowFlags();
|
|
|
|
bool interpreter_stack_overflow = false;
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
if (FLAG_enable_interpreter) {
|
|
// Do not allocate an interpreter, if none is allocated yet.
|
|
Interpreter* interpreter = thread->interpreter();
|
|
if (interpreter != NULL) {
|
|
interpreter_stack_overflow =
|
|
interpreter->get_sp() >= interpreter->overflow_stack_limit();
|
|
}
|
|
}
|
|
#endif // !defined(DART_PRECOMPILED_RUNTIME)
|
|
|
|
// If an interrupt happens at the same time as a stack overflow, we
|
|
// process the stack overflow now and leave the interrupt for next
|
|
// time.
|
|
// TODO(regis): Warning: IsCalleeFrameOf is overridden in stack_frame_dbc.h.
|
|
if (interpreter_stack_overflow || !thread->os_thread()->HasStackHeadroom() ||
|
|
IsCalleeFrameOf(thread->saved_stack_limit(), stack_pos)) {
|
|
if (FLAG_verbose_stack_overflow) {
|
|
OS::PrintErr("Stack overflow in %s\n",
|
|
interpreter_stack_overflow ? "interpreter" : "native code");
|
|
OS::PrintErr(" Native SP = %" Px ", stack limit = %" Px "\n", stack_pos,
|
|
thread->saved_stack_limit());
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
if (thread->interpreter() != nullptr) {
|
|
OS::PrintErr(" Interpreter SP = %" Px ", stack limit = %" Px "\n",
|
|
thread->interpreter()->get_sp(),
|
|
thread->interpreter()->overflow_stack_limit());
|
|
}
|
|
#endif // !defined(DART_PRECOMPILED_RUNTIME)
|
|
|
|
OS::PrintErr("Call stack:\n");
|
|
OS::PrintErr("size | frame\n");
|
|
StackFrameIterator frames(ValidationPolicy::kDontValidateFrames, thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
uword fp = stack_pos;
|
|
StackFrame* frame = frames.NextFrame();
|
|
while (frame != NULL) {
|
|
if (frame->is_interpreted() == interpreter_stack_overflow) {
|
|
uword delta = interpreter_stack_overflow ? (fp - frame->fp())
|
|
: (frame->fp() - fp);
|
|
fp = frame->fp();
|
|
OS::PrintErr("%4" Pd " %s\n", delta, frame->ToCString());
|
|
} else {
|
|
OS::PrintErr(" %s\n", frame->ToCString());
|
|
}
|
|
frame = frames.NextFrame();
|
|
}
|
|
}
|
|
|
|
// Use the preallocated stack overflow exception to avoid calling
|
|
// into dart code.
|
|
const Instance& exception =
|
|
Instance::Handle(isolate->object_store()->stack_overflow());
|
|
Exceptions::Throw(thread, exception);
|
|
UNREACHABLE();
|
|
}
|
|
|
|
#if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
HandleStackOverflowTestCases(thread);
|
|
#endif // !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
|
|
// Handle interrupts:
|
|
// - store buffer overflow
|
|
// - OOB message (vm-service or dart:isolate)
|
|
const Error& error = Error::Handle(thread->HandleInterrupts());
|
|
ThrowIfError(error);
|
|
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
if ((stack_overflow_flags & Thread::kOsrRequest) != 0) {
|
|
HandleOSRRequest(thread);
|
|
}
|
|
#else
|
|
ASSERT((stack_overflow_flags & Thread::kOsrRequest) == 0);
|
|
#endif // !defined(DART_PRECOMPILED_RUNTIME)
|
|
}
|
|
|
|
DEFINE_RUNTIME_ENTRY(TraceICCall, 2) {
|
|
const ICData& ic_data = ICData::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const Function& function = Function::CheckedHandle(zone, arguments.ArgAt(1));
|
|
DartFrameIterator iterator(thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* frame = iterator.NextFrame();
|
|
ASSERT(frame != NULL);
|
|
OS::PrintErr("IC call @%#" Px ": ICData: %p cnt:%" Pd " nchecks: %" Pd
|
|
" %s\n",
|
|
frame->pc(), ic_data.raw(), function.usage_counter(),
|
|
ic_data.NumberOfChecks(), function.ToFullyQualifiedCString());
|
|
}
|
|
|
|
// This is called from interpreter when function usage counter reached
|
|
// compilation threshold and function needs to be compiled.
|
|
DEFINE_RUNTIME_ENTRY(CompileInterpretedFunction, 1) {
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
const Function& function = Function::CheckedHandle(zone, arguments.ArgAt(0));
|
|
ASSERT(!function.IsNull());
|
|
ASSERT(FLAG_enable_interpreter);
|
|
|
|
#if !defined(PRODUCT)
|
|
if (Debugger::IsDebugging(thread, function)) {
|
|
return;
|
|
}
|
|
#endif // !defined(PRODUCT)
|
|
|
|
if (FLAG_background_compilation) {
|
|
if (!BackgroundCompiler::IsDisabled(isolate,
|
|
/* optimizing_compilation = */ false) &&
|
|
function.is_background_optimizable()) {
|
|
// Ensure background compiler is running, if not start it.
|
|
BackgroundCompiler::Start(isolate);
|
|
// Reduce the chance of triggering a compilation while the function is
|
|
// being compiled in the background. INT_MIN should ensure that it
|
|
// takes long time to trigger a compilation.
|
|
// Note that the background compilation queue rejects duplicate entries.
|
|
function.SetUsageCounter(INT_MIN);
|
|
isolate->background_compiler()->Compile(function);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Reset usage counter for future optimization.
|
|
function.SetUsageCounter(0);
|
|
Object& result =
|
|
Object::Handle(zone, Compiler::CompileFunction(thread, function));
|
|
ThrowIfError(result);
|
|
#else
|
|
UNREACHABLE();
|
|
#endif // !DART_PRECOMPILED_RUNTIME
|
|
}
|
|
|
|
// This is called from function that needs to be optimized.
|
|
// The requesting function can be already optimized (reoptimization).
|
|
// Returns the Code object where to continue execution.
|
|
DEFINE_RUNTIME_ENTRY(OptimizeInvokedFunction, 1) {
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
const Function& function = Function::CheckedHandle(zone, arguments.ArgAt(0));
|
|
ASSERT(!function.IsNull());
|
|
ASSERT(function.HasCode());
|
|
|
|
if (Compiler::CanOptimizeFunction(thread, function)) {
|
|
if (FLAG_background_compilation) {
|
|
Field& field = Field::Handle(zone, isolate->GetDeoptimizingBoxedField());
|
|
while (!field.IsNull()) {
|
|
if (FLAG_trace_optimization || FLAG_trace_field_guards) {
|
|
THR_Print("Lazy disabling unboxing of %s\n", field.ToCString());
|
|
}
|
|
field.set_is_unboxing_candidate(false);
|
|
field.DeoptimizeDependentCode();
|
|
// Get next field.
|
|
field = isolate->GetDeoptimizingBoxedField();
|
|
}
|
|
if (!BackgroundCompiler::IsDisabled(isolate,
|
|
/* optimizing_compiler = */ true) &&
|
|
function.is_background_optimizable()) {
|
|
// Ensure background compiler is running, if not start it.
|
|
BackgroundCompiler::Start(isolate);
|
|
// Reduce the chance of triggering a compilation while the function is
|
|
// being compiled in the background. INT_MIN should ensure that it
|
|
// takes long time to trigger a compilation.
|
|
// Note that the background compilation queue rejects duplicate entries.
|
|
function.SetUsageCounter(INT_MIN);
|
|
isolate->optimizing_background_compiler()->Compile(function);
|
|
// Continue in the same code.
|
|
arguments.SetReturn(function);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Reset usage counter for reoptimization before calling optimizer to
|
|
// prevent recursive triggering of function optimization.
|
|
function.SetUsageCounter(0);
|
|
if (FLAG_trace_compiler || FLAG_trace_optimizing_compiler) {
|
|
if (function.HasOptimizedCode()) {
|
|
THR_Print("ReCompiling function: '%s' \n",
|
|
function.ToFullyQualifiedCString());
|
|
}
|
|
}
|
|
Object& result = Object::Handle(
|
|
zone, Compiler::CompileOptimizedFunction(thread, function));
|
|
ThrowIfError(result);
|
|
}
|
|
arguments.SetReturn(function);
|
|
#else
|
|
UNREACHABLE();
|
|
#endif // !DART_PRECOMPILED_RUNTIME
|
|
}
|
|
|
|
// The caller must be a static call in a Dart frame, or an entry frame.
|
|
// Patch static call to point to valid code's entry point.
|
|
DEFINE_RUNTIME_ENTRY(FixCallersTarget, 0) {
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
StackFrameIterator iterator(ValidationPolicy::kDontValidateFrames, thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* frame = iterator.NextFrame();
|
|
ASSERT(frame != NULL);
|
|
while (frame->IsStubFrame() || frame->IsExitFrame()) {
|
|
frame = iterator.NextFrame();
|
|
ASSERT(frame != NULL);
|
|
}
|
|
if (frame->IsEntryFrame()) {
|
|
// Since function's current code is always unpatched, the entry frame always
|
|
// calls to unpatched code.
|
|
UNREACHABLE();
|
|
}
|
|
ASSERT(frame->IsDartFrame());
|
|
const Code& caller_code = Code::Handle(zone, frame->LookupDartCode());
|
|
RELEASE_ASSERT(caller_code.is_optimized());
|
|
const Function& target_function = Function::Handle(
|
|
zone, caller_code.GetStaticCallTargetFunctionAt(frame->pc()));
|
|
|
|
const Code& current_target_code =
|
|
Code::Handle(zone, target_function.EnsureHasCode());
|
|
CodePatcher::PatchStaticCallAt(frame->pc(), caller_code, current_target_code);
|
|
caller_code.SetStaticCallTargetCodeAt(frame->pc(), current_target_code);
|
|
if (FLAG_trace_patching) {
|
|
OS::PrintErr(
|
|
"FixCallersTarget: caller %#" Px
|
|
" "
|
|
"target '%s' -> %#" Px " (%s)\n",
|
|
frame->pc(), target_function.ToFullyQualifiedCString(),
|
|
current_target_code.EntryPoint(),
|
|
current_target_code.is_optimized() ? "optimized" : "unoptimized");
|
|
}
|
|
ASSERT(!current_target_code.IsDisabled());
|
|
arguments.SetReturn(current_target_code);
|
|
#else
|
|
UNREACHABLE();
|
|
#endif
|
|
}
|
|
|
|
// The caller must be a monomorphic call from unoptimized code.
|
|
// Patch call to point to new target.
|
|
DEFINE_RUNTIME_ENTRY(FixCallersTargetMonomorphic, 0) {
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
StackFrameIterator iterator(ValidationPolicy::kDontValidateFrames, thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* frame = iterator.NextFrame();
|
|
ASSERT(frame != NULL);
|
|
while (frame->IsStubFrame() || frame->IsExitFrame()) {
|
|
frame = iterator.NextFrame();
|
|
ASSERT(frame != NULL);
|
|
}
|
|
if (frame->IsEntryFrame()) {
|
|
// Since function's current code is always unpatched, the entry frame always
|
|
// calls to unpatched code.
|
|
UNREACHABLE();
|
|
}
|
|
ASSERT(frame->IsDartFrame());
|
|
const Code& caller_code = Code::Handle(zone, frame->LookupDartCode());
|
|
RELEASE_ASSERT(!caller_code.is_optimized());
|
|
|
|
Object& cache = Object::Handle(zone);
|
|
const Code& old_target_code = Code::Handle(
|
|
zone, CodePatcher::GetInstanceCallAt(frame->pc(), caller_code, &cache));
|
|
const Function& target_function =
|
|
Function::Handle(zone, old_target_code.function());
|
|
const Code& current_target_code =
|
|
Code::Handle(zone, target_function.EnsureHasCode());
|
|
CodePatcher::PatchInstanceCallAt(frame->pc(), caller_code, cache,
|
|
current_target_code);
|
|
if (FLAG_trace_patching) {
|
|
OS::PrintErr(
|
|
"FixCallersTargetMonomorphic: caller %#" Px
|
|
" "
|
|
"target '%s' -> %#" Px " (%s)\n",
|
|
frame->pc(), target_function.ToFullyQualifiedCString(),
|
|
current_target_code.EntryPoint(),
|
|
current_target_code.is_optimized() ? "optimized" : "unoptimized");
|
|
}
|
|
ASSERT(!current_target_code.IsDisabled());
|
|
arguments.SetReturn(current_target_code);
|
|
#else
|
|
UNREACHABLE();
|
|
#endif
|
|
}
|
|
|
|
// The caller tried to allocate an instance via an invalidated allocation
|
|
// stub.
|
|
DEFINE_RUNTIME_ENTRY(FixAllocationStubTarget, 0) {
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
StackFrameIterator iterator(ValidationPolicy::kDontValidateFrames, thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* frame = iterator.NextFrame();
|
|
ASSERT(frame != NULL);
|
|
while (frame->IsStubFrame() || frame->IsExitFrame()) {
|
|
frame = iterator.NextFrame();
|
|
ASSERT(frame != NULL);
|
|
}
|
|
if (frame->IsEntryFrame()) {
|
|
// There must be a valid Dart frame.
|
|
UNREACHABLE();
|
|
}
|
|
ASSERT(frame->IsDartFrame());
|
|
const Code& caller_code = Code::Handle(zone, frame->LookupDartCode());
|
|
ASSERT(!caller_code.IsNull());
|
|
const Code& stub = Code::Handle(
|
|
CodePatcher::GetStaticCallTargetAt(frame->pc(), caller_code));
|
|
Class& alloc_class = Class::ZoneHandle(zone);
|
|
alloc_class ^= stub.owner();
|
|
Code& alloc_stub = Code::Handle(zone, alloc_class.allocation_stub());
|
|
if (alloc_stub.IsNull()) {
|
|
alloc_stub = StubCode::GetAllocationStubForClass(alloc_class);
|
|
ASSERT(!alloc_stub.IsDisabled());
|
|
}
|
|
CodePatcher::PatchStaticCallAt(frame->pc(), caller_code, alloc_stub);
|
|
caller_code.SetStubCallTargetCodeAt(frame->pc(), alloc_stub);
|
|
if (FLAG_trace_patching) {
|
|
OS::PrintErr("FixAllocationStubTarget: caller %#" Px
|
|
" alloc-class %s "
|
|
" -> %#" Px "\n",
|
|
frame->pc(), alloc_class.ToCString(), alloc_stub.EntryPoint());
|
|
}
|
|
arguments.SetReturn(alloc_stub);
|
|
#else
|
|
UNREACHABLE();
|
|
#endif
|
|
}
|
|
|
|
const char* DeoptReasonToCString(ICData::DeoptReasonId deopt_reason) {
|
|
switch (deopt_reason) {
|
|
#define DEOPT_REASON_TO_TEXT(name) \
|
|
case ICData::kDeopt##name: \
|
|
return #name;
|
|
DEOPT_REASONS(DEOPT_REASON_TO_TEXT)
|
|
#undef DEOPT_REASON_TO_TEXT
|
|
default:
|
|
UNREACHABLE();
|
|
return "";
|
|
}
|
|
}
|
|
|
|
void DeoptimizeAt(const Code& optimized_code, StackFrame* frame) {
|
|
ASSERT(optimized_code.is_optimized());
|
|
|
|
// Force-optimized code is optimized code which cannot deoptimize and doesn't
|
|
// have unoptimized code to fall back to.
|
|
ASSERT(!optimized_code.is_force_optimized());
|
|
|
|
Thread* thread = Thread::Current();
|
|
Zone* zone = thread->zone();
|
|
const Function& function = Function::Handle(zone, optimized_code.function());
|
|
const Error& error =
|
|
Error::Handle(zone, Compiler::EnsureUnoptimizedCode(thread, function));
|
|
if (!error.IsNull()) {
|
|
Exceptions::PropagateError(error);
|
|
}
|
|
const Code& unoptimized_code =
|
|
Code::Handle(zone, function.unoptimized_code());
|
|
ASSERT(!unoptimized_code.IsNull());
|
|
// The switch to unoptimized code may have already occurred.
|
|
if (function.HasOptimizedCode()) {
|
|
function.SwitchToUnoptimizedCode();
|
|
}
|
|
|
|
#if defined(TARGET_ARCH_DBC)
|
|
const Instructions& instrs =
|
|
Instructions::Handle(zone, optimized_code.instructions());
|
|
{
|
|
WritableInstructionsScope writable(instrs.PayloadStart(), instrs.Size());
|
|
CodePatcher::InsertDeoptimizationCallAt(frame->pc());
|
|
if (FLAG_trace_patching) {
|
|
const String& name = String::Handle(function.name());
|
|
OS::PrintErr("InsertDeoptimizationCallAt: 0x%" Px " for %s\n",
|
|
frame->pc(), name.ToCString());
|
|
}
|
|
const ExceptionHandlers& handlers =
|
|
ExceptionHandlers::Handle(zone, optimized_code.exception_handlers());
|
|
ExceptionHandlerInfo info;
|
|
for (intptr_t i = 0; i < handlers.num_entries(); ++i) {
|
|
handlers.GetHandlerInfo(i, &info);
|
|
const uword patch_pc = instrs.PayloadStart() + info.handler_pc_offset;
|
|
CodePatcher::InsertDeoptimizationCallAt(patch_pc);
|
|
if (FLAG_trace_patching) {
|
|
OS::PrintErr(" at handler 0x%" Px "\n", patch_pc);
|
|
}
|
|
}
|
|
}
|
|
#else // !DBC
|
|
if (frame->IsMarkedForLazyDeopt()) {
|
|
// Deopt already scheduled.
|
|
if (FLAG_trace_deoptimization) {
|
|
THR_Print("Lazy deopt already scheduled for fp=%" Pp "\n", frame->fp());
|
|
}
|
|
} else {
|
|
uword deopt_pc = frame->pc();
|
|
ASSERT(optimized_code.ContainsInstructionAt(deopt_pc));
|
|
|
|
#if defined(DEBUG)
|
|
ValidateFrames();
|
|
#endif
|
|
|
|
// N.B.: Update the pending deopt table before updating the frame. The
|
|
// profiler may attempt a stack walk in between.
|
|
ASSERT(!frame->is_interpreted());
|
|
thread->isolate()->AddPendingDeopt(frame->fp(), deopt_pc);
|
|
frame->MarkForLazyDeopt();
|
|
|
|
if (FLAG_trace_deoptimization) {
|
|
THR_Print("Lazy deopt scheduled for fp=%" Pp ", pc=%" Pp "\n",
|
|
frame->fp(), deopt_pc);
|
|
}
|
|
}
|
|
#endif // !DBC
|
|
|
|
// Mark code as dead (do not GC its embedded objects).
|
|
optimized_code.set_is_alive(false);
|
|
}
|
|
|
|
// Currently checks only that all optimized frames have kDeoptIndex
|
|
// and unoptimized code has the kDeoptAfter.
|
|
void DeoptimizeFunctionsOnStack() {
|
|
DartFrameIterator iterator(Thread::Current(),
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* frame = iterator.NextFrame();
|
|
Code& optimized_code = Code::Handle();
|
|
while (frame != NULL) {
|
|
if (!frame->is_interpreted()) {
|
|
optimized_code = frame->LookupDartCode();
|
|
if (optimized_code.is_optimized() &&
|
|
!optimized_code.is_force_optimized()) {
|
|
DeoptimizeAt(optimized_code, frame);
|
|
}
|
|
}
|
|
frame = iterator.NextFrame();
|
|
}
|
|
}
|
|
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
#if !defined(TARGET_ARCH_DBC)
|
|
static const intptr_t kNumberOfSavedCpuRegisters = kNumberOfCpuRegisters;
|
|
static const intptr_t kNumberOfSavedFpuRegisters = kNumberOfFpuRegisters;
|
|
#else
|
|
static const intptr_t kNumberOfSavedCpuRegisters = 0;
|
|
static const intptr_t kNumberOfSavedFpuRegisters = 0;
|
|
#endif
|
|
|
|
static void CopySavedRegisters(uword saved_registers_address,
|
|
fpu_register_t** fpu_registers,
|
|
intptr_t** cpu_registers) {
|
|
ASSERT(sizeof(fpu_register_t) == kFpuRegisterSize);
|
|
fpu_register_t* fpu_registers_copy =
|
|
new fpu_register_t[kNumberOfSavedFpuRegisters];
|
|
ASSERT(fpu_registers_copy != NULL);
|
|
for (intptr_t i = 0; i < kNumberOfSavedFpuRegisters; i++) {
|
|
fpu_registers_copy[i] =
|
|
*reinterpret_cast<fpu_register_t*>(saved_registers_address);
|
|
saved_registers_address += kFpuRegisterSize;
|
|
}
|
|
*fpu_registers = fpu_registers_copy;
|
|
|
|
ASSERT(sizeof(intptr_t) == kWordSize);
|
|
intptr_t* cpu_registers_copy = new intptr_t[kNumberOfSavedCpuRegisters];
|
|
ASSERT(cpu_registers_copy != NULL);
|
|
for (intptr_t i = 0; i < kNumberOfSavedCpuRegisters; i++) {
|
|
cpu_registers_copy[i] =
|
|
*reinterpret_cast<intptr_t*>(saved_registers_address);
|
|
saved_registers_address += kWordSize;
|
|
}
|
|
*cpu_registers = cpu_registers_copy;
|
|
}
|
|
#endif
|
|
|
|
// Copies saved registers and caller's frame into temporary buffers.
|
|
// Returns the stack size of unoptimized frame.
|
|
// The calling code must be optimized, but its function may not have
|
|
// have optimized code if the code is OSR code, or if the code was invalidated
|
|
// through class loading/finalization or field guard.
|
|
DEFINE_LEAF_RUNTIME_ENTRY(intptr_t,
|
|
DeoptimizeCopyFrame,
|
|
2,
|
|
uword saved_registers_address,
|
|
uword is_lazy_deopt) {
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
Thread* thread = Thread::Current();
|
|
Isolate* isolate = thread->isolate();
|
|
StackZone zone(thread);
|
|
HANDLESCOPE(thread);
|
|
|
|
// All registers have been saved below last-fp as if they were locals.
|
|
const uword last_fp =
|
|
saved_registers_address + (kNumberOfSavedCpuRegisters * kWordSize) +
|
|
(kNumberOfSavedFpuRegisters * kFpuRegisterSize) -
|
|
((runtime_frame_layout.first_local_from_fp + 1) * kWordSize);
|
|
|
|
// Get optimized code and frame that need to be deoptimized.
|
|
DartFrameIterator iterator(last_fp, thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(caller_frame != NULL);
|
|
const Code& optimized_code = Code::Handle(caller_frame->LookupDartCode());
|
|
ASSERT(optimized_code.is_optimized());
|
|
const Function& top_function =
|
|
Function::Handle(thread->zone(), optimized_code.function());
|
|
const bool deoptimizing_code = top_function.HasOptimizedCode();
|
|
if (FLAG_trace_deoptimization) {
|
|
const Function& function = Function::Handle(optimized_code.function());
|
|
THR_Print("== Deoptimizing code for '%s', %s, %s\n",
|
|
function.ToFullyQualifiedCString(),
|
|
deoptimizing_code ? "code & frame" : "frame",
|
|
(is_lazy_deopt != 0u) ? "lazy-deopt" : "");
|
|
}
|
|
|
|
#if !defined(TARGET_ARCH_DBC)
|
|
if (is_lazy_deopt != 0u) {
|
|
uword deopt_pc = isolate->FindPendingDeopt(caller_frame->fp());
|
|
if (FLAG_trace_deoptimization) {
|
|
THR_Print("Lazy deopt fp=%" Pp " pc=%" Pp "\n", caller_frame->fp(),
|
|
deopt_pc);
|
|
}
|
|
|
|
// N.B.: Update frame before updating pending deopt table. The profiler
|
|
// may attempt a stack walk in between.
|
|
caller_frame->set_pc(deopt_pc);
|
|
ASSERT(caller_frame->pc() == deopt_pc);
|
|
ASSERT(optimized_code.ContainsInstructionAt(caller_frame->pc()));
|
|
isolate->ClearPendingDeoptsAtOrBelow(caller_frame->fp());
|
|
} else {
|
|
if (FLAG_trace_deoptimization) {
|
|
THR_Print("Eager deopt fp=%" Pp " pc=%" Pp "\n", caller_frame->fp(),
|
|
caller_frame->pc());
|
|
}
|
|
}
|
|
#endif // !DBC
|
|
|
|
// Copy the saved registers from the stack.
|
|
fpu_register_t* fpu_registers;
|
|
intptr_t* cpu_registers;
|
|
CopySavedRegisters(saved_registers_address, &fpu_registers, &cpu_registers);
|
|
|
|
// Create the DeoptContext.
|
|
DeoptContext* deopt_context = new DeoptContext(
|
|
caller_frame, optimized_code, DeoptContext::kDestIsOriginalFrame,
|
|
fpu_registers, cpu_registers, is_lazy_deopt != 0, deoptimizing_code);
|
|
isolate->set_deopt_context(deopt_context);
|
|
|
|
// Stack size (FP - SP) in bytes.
|
|
return deopt_context->DestStackAdjustment() * kWordSize;
|
|
#else
|
|
UNREACHABLE();
|
|
return 0;
|
|
#endif // !DART_PRECOMPILED_RUNTIME
|
|
}
|
|
END_LEAF_RUNTIME_ENTRY
|
|
|
|
// The stack has been adjusted to fit all values for unoptimized frame.
|
|
// Fill the unoptimized frame.
|
|
DEFINE_LEAF_RUNTIME_ENTRY(void, DeoptimizeFillFrame, 1, uword last_fp) {
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
Thread* thread = Thread::Current();
|
|
Isolate* isolate = thread->isolate();
|
|
StackZone zone(thread);
|
|
HANDLESCOPE(thread);
|
|
|
|
DeoptContext* deopt_context = isolate->deopt_context();
|
|
DartFrameIterator iterator(last_fp, thread,
|
|
StackFrameIterator::kNoCrossThreadIteration);
|
|
StackFrame* caller_frame = iterator.NextFrame();
|
|
ASSERT(caller_frame != NULL);
|
|
|
|
#if defined(DEBUG)
|
|
{
|
|
// The code from the deopt_context.
|
|
const Code& code = Code::Handle(deopt_context->code());
|
|
|
|
// The code from our frame.
|
|
const Code& optimized_code = Code::Handle(caller_frame->LookupDartCode());
|
|
const Function& function = Function::Handle(optimized_code.function());
|
|
ASSERT(!function.IsNull());
|
|
|
|
// The code will be the same as before.
|
|
ASSERT(code.raw() == optimized_code.raw());
|
|
|
|
// Some sanity checking of the optimized code.
|
|
ASSERT(!optimized_code.IsNull() && optimized_code.is_optimized());
|
|
}
|
|
#endif
|
|
|
|
deopt_context->set_dest_frame(caller_frame);
|
|
deopt_context->FillDestFrame();
|
|
|
|
#else
|
|
UNREACHABLE();
|
|
#endif // !DART_PRECOMPILED_RUNTIME
|
|
}
|
|
END_LEAF_RUNTIME_ENTRY
|
|
|
|
// This is the last step in the deoptimization, GC can occur.
|
|
// Returns number of bytes to remove from the expression stack of the
|
|
// bottom-most deoptimized frame. Those arguments were artificially injected
|
|
// under return address to keep them discoverable by GC that can occur during
|
|
// materialization phase.
|
|
DEFINE_RUNTIME_ENTRY(DeoptimizeMaterialize, 0) {
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
#if defined(DEBUG)
|
|
{
|
|
// We may rendezvous for a safepoint at entry or GC from the allocations
|
|
// below. Check the stack is walkable.
|
|
ValidateFrames();
|
|
}
|
|
#endif
|
|
DeoptContext* deopt_context = isolate->deopt_context();
|
|
intptr_t deopt_arg_count = deopt_context->MaterializeDeferredObjects();
|
|
isolate->set_deopt_context(NULL);
|
|
delete deopt_context;
|
|
|
|
// Return value tells deoptimization stub to remove the given number of bytes
|
|
// from the stack.
|
|
arguments.SetReturn(Smi::Handle(Smi::New(deopt_arg_count * kWordSize)));
|
|
#else
|
|
UNREACHABLE();
|
|
#endif // !DART_PRECOMPILED_RUNTIME
|
|
}
|
|
|
|
DEFINE_RUNTIME_ENTRY(RewindPostDeopt, 0) {
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
#if !defined(PRODUCT)
|
|
isolate->debugger()->RewindPostDeopt();
|
|
#endif // !PRODUCT
|
|
#endif // !DART_PRECOMPILED_RUNTIME
|
|
UNREACHABLE();
|
|
}
|
|
|
|
double DartModulo(double left, double right) {
|
|
double remainder = fmod_ieee(left, right);
|
|
if (remainder == 0.0) {
|
|
// We explicitly switch to the positive 0.0 (just in case it was negative).
|
|
remainder = +0.0;
|
|
} else if (remainder < 0.0) {
|
|
if (right < 0) {
|
|
remainder -= right;
|
|
} else {
|
|
remainder += right;
|
|
}
|
|
}
|
|
return remainder;
|
|
}
|
|
|
|
// Update global type feedback recorded for a field recording the assignment
|
|
// of the given value.
|
|
// Arg0: Field object;
|
|
// Arg1: Value that is being stored.
|
|
DEFINE_RUNTIME_ENTRY(UpdateFieldCid, 2) {
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
const Field& field = Field::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const Object& value = Object::Handle(arguments.ArgAt(1));
|
|
field.RecordStore(value);
|
|
#else
|
|
UNREACHABLE();
|
|
#endif
|
|
}
|
|
|
|
DEFINE_RUNTIME_ENTRY(InitStaticField, 1) {
|
|
const Field& field = Field::CheckedHandle(zone, arguments.ArgAt(0));
|
|
const Error& result = Error::Handle(zone, field.Initialize());
|
|
ThrowIfError(result);
|
|
}
|
|
|
|
// Print the stop message.
|
|
DEFINE_LEAF_RUNTIME_ENTRY(void, PrintStopMessage, 1, const char* message) {
|
|
OS::PrintErr("Stop message: %s\n", message);
|
|
}
|
|
END_LEAF_RUNTIME_ENTRY
|
|
|
|
// Use expected function signatures to help MSVC compiler resolve overloading.
|
|
typedef double (*UnaryMathCFunction)(double x);
|
|
typedef double (*BinaryMathCFunction)(double x, double y);
|
|
|
|
DEFINE_RAW_LEAF_RUNTIME_ENTRY(
|
|
LibcPow,
|
|
2,
|
|
true /* is_float */,
|
|
reinterpret_cast<RuntimeFunction>(static_cast<BinaryMathCFunction>(&pow)));
|
|
|
|
DEFINE_RAW_LEAF_RUNTIME_ENTRY(
|
|
DartModulo,
|
|
2,
|
|
true /* is_float */,
|
|
reinterpret_cast<RuntimeFunction>(
|
|
static_cast<BinaryMathCFunction>(&DartModulo)));
|
|
|
|
DEFINE_RAW_LEAF_RUNTIME_ENTRY(
|
|
LibcAtan2,
|
|
2,
|
|
true /* is_float */,
|
|
reinterpret_cast<RuntimeFunction>(
|
|
static_cast<BinaryMathCFunction>(&atan2_ieee)));
|
|
|
|
DEFINE_RAW_LEAF_RUNTIME_ENTRY(
|
|
LibcFloor,
|
|
1,
|
|
true /* is_float */,
|
|
reinterpret_cast<RuntimeFunction>(static_cast<UnaryMathCFunction>(&floor)));
|
|
|
|
DEFINE_RAW_LEAF_RUNTIME_ENTRY(
|
|
LibcCeil,
|
|
1,
|
|
true /* is_float */,
|
|
reinterpret_cast<RuntimeFunction>(static_cast<UnaryMathCFunction>(&ceil)));
|
|
|
|
DEFINE_RAW_LEAF_RUNTIME_ENTRY(
|
|
LibcTrunc,
|
|
1,
|
|
true /* is_float */,
|
|
reinterpret_cast<RuntimeFunction>(static_cast<UnaryMathCFunction>(&trunc)));
|
|
|
|
DEFINE_RAW_LEAF_RUNTIME_ENTRY(
|
|
LibcRound,
|
|
1,
|
|
true /* is_float */,
|
|
reinterpret_cast<RuntimeFunction>(static_cast<UnaryMathCFunction>(&round)));
|
|
|
|
DEFINE_RAW_LEAF_RUNTIME_ENTRY(
|
|
LibcCos,
|
|
1,
|
|
true /* is_float */,
|
|
reinterpret_cast<RuntimeFunction>(static_cast<UnaryMathCFunction>(&cos)));
|
|
|
|
DEFINE_RAW_LEAF_RUNTIME_ENTRY(
|
|
LibcSin,
|
|
1,
|
|
true /* is_float */,
|
|
reinterpret_cast<RuntimeFunction>(static_cast<UnaryMathCFunction>(&sin)));
|
|
|
|
DEFINE_RAW_LEAF_RUNTIME_ENTRY(
|
|
LibcAsin,
|
|
1,
|
|
true /* is_float */,
|
|
reinterpret_cast<RuntimeFunction>(static_cast<UnaryMathCFunction>(&asin)));
|
|
|
|
DEFINE_RAW_LEAF_RUNTIME_ENTRY(
|
|
LibcAcos,
|
|
1,
|
|
true /* is_float */,
|
|
reinterpret_cast<RuntimeFunction>(static_cast<UnaryMathCFunction>(&acos)));
|
|
|
|
DEFINE_RAW_LEAF_RUNTIME_ENTRY(
|
|
LibcTan,
|
|
1,
|
|
true /* is_float */,
|
|
reinterpret_cast<RuntimeFunction>(static_cast<UnaryMathCFunction>(&tan)));
|
|
|
|
DEFINE_RAW_LEAF_RUNTIME_ENTRY(
|
|
LibcAtan,
|
|
1,
|
|
true /* is_float */,
|
|
reinterpret_cast<RuntimeFunction>(static_cast<UnaryMathCFunction>(&atan)));
|
|
|
|
uword RuntimeEntry::InterpretCallEntry() {
|
|
uword entry = reinterpret_cast<uword>(RuntimeEntry::InterpretCall);
|
|
#if defined(USING_SIMULATOR) && !defined(TARGET_ARCH_DBC)
|
|
// DBC does not use redirections unlike other simulators.
|
|
entry = Simulator::RedirectExternalReference(entry,
|
|
Simulator::kLeafRuntimeCall, 5);
|
|
#endif
|
|
return entry;
|
|
}
|
|
|
|
// Interpret a function call. Should be called only for non-jitted functions.
|
|
// argc indicates the number of arguments, including the type arguments.
|
|
// argv points to the first argument.
|
|
// If argc < 0, arguments are passed at decreasing memory addresses from argv.
|
|
RawObject* RuntimeEntry::InterpretCall(RawFunction* function,
|
|
RawArray* argdesc,
|
|
intptr_t argc,
|
|
RawObject** argv,
|
|
Thread* thread) {
|
|
#if defined(DART_PRECOMPILED_RUNTIME)
|
|
UNREACHABLE();
|
|
#else
|
|
ASSERT(FLAG_enable_interpreter);
|
|
Interpreter* interpreter = Interpreter::Current();
|
|
#if defined(DEBUG)
|
|
uword exit_fp = thread->top_exit_frame_info();
|
|
ASSERT(exit_fp != 0);
|
|
ASSERT(thread == Thread::Current());
|
|
// Caller is InterpretCall stub called from generated code.
|
|
// We stay in "in generated code" execution state when interpreting code.
|
|
ASSERT(thread->execution_state() == Thread::kThreadInGenerated);
|
|
ASSERT(!Function::HasCode(function));
|
|
ASSERT(Function::HasBytecode(function));
|
|
ASSERT(interpreter != NULL);
|
|
#endif
|
|
RawObject* result = interpreter->Call(function, argdesc, argc, argv, thread);
|
|
DEBUG_ASSERT(thread->top_exit_frame_info() == exit_fp);
|
|
if (RawObject::IsErrorClassId(result->GetClassIdMayBeSmi())) {
|
|
// Must not leak handles in the caller's zone.
|
|
HANDLESCOPE(thread);
|
|
// Protect the result in a handle before transitioning, which may trigger
|
|
// GC.
|
|
const Error& error = Error::Handle(Error::RawCast(result));
|
|
// Propagating an error may cause allocation. Check if we need to block for
|
|
// a safepoint by switching to "in VM" execution state.
|
|
TransitionGeneratedToVM transition(thread);
|
|
Exceptions::PropagateError(error);
|
|
}
|
|
return result;
|
|
#endif // defined(DART_PRECOMPILED_RUNTIME)
|
|
}
|
|
|
|
extern "C" void DFLRT_EnterSafepoint(NativeArguments __unusable_) {
|
|
CHECK_STACK_ALIGNMENT;
|
|
Thread* thread = Thread::Current();
|
|
ASSERT(thread->top_exit_frame_info() != 0);
|
|
ASSERT(thread->execution_state() == Thread::kThreadInNative);
|
|
thread->EnterSafepoint();
|
|
}
|
|
DEFINE_RAW_LEAF_RUNTIME_ENTRY(EnterSafepoint, 0, false, &DFLRT_EnterSafepoint);
|
|
|
|
extern "C" void DFLRT_ExitSafepoint(NativeArguments __unusable_) {
|
|
CHECK_STACK_ALIGNMENT;
|
|
Thread* thread = Thread::Current();
|
|
ASSERT(thread->top_exit_frame_info() != 0);
|
|
|
|
ASSERT(thread->execution_state() == Thread::kThreadInVM);
|
|
thread->ExitSafepoint();
|
|
}
|
|
DEFINE_RAW_LEAF_RUNTIME_ENTRY(ExitSafepoint, 0, false, &DFLRT_ExitSafepoint);
|
|
|
|
// Not registered as a runtime entry because we can't use Thread to look it up.
|
|
static Thread* GetThreadForNativeCallback(uword callback_id,
|
|
uword return_address) {
|
|
Thread* const thread = Thread::Current();
|
|
if (thread == nullptr) {
|
|
FATAL("Cannot invoke native callback outside an isolate.");
|
|
}
|
|
if (thread->no_callback_scope_depth() != 0) {
|
|
FATAL("Cannot invoke native callback when API callbacks are prohibited.");
|
|
}
|
|
if (!thread->IsMutatorThread()) {
|
|
FATAL("Native callbacks must be invoked on the mutator thread.");
|
|
}
|
|
|
|
// Set the execution state to VM while waiting for the safepoint to end.
|
|
// This isn't strictly necessary but enables tests to check that we're not
|
|
// in native code anymore. See tests/ffi/function_gc_test.dart for example.
|
|
thread->set_execution_state(Thread::kThreadInVM);
|
|
|
|
thread->ExitSafepoint();
|
|
thread->VerifyCallbackIsolate(callback_id, return_address);
|
|
|
|
return thread;
|
|
}
|
|
|
|
#if defined(HOST_OS_WINDOWS)
|
|
#pragma intrinsic(_ReturnAddress)
|
|
#endif
|
|
|
|
// This is called directly by NativeEntryInstr. At the moment we enter this
|
|
// routine, the caller is generated code in the Isolate heap. Therefore we check
|
|
// that the return address (caller) corresponds to the declared callback ID's
|
|
// code within this Isolate.
|
|
extern "C" Thread* DLRT_GetThreadForNativeCallback(uword callback_id) {
|
|
CHECK_STACK_ALIGNMENT;
|
|
#if defined(HOST_OS_WINDOWS)
|
|
void* return_address = _ReturnAddress();
|
|
#else
|
|
void* return_address = __builtin_return_address(0);
|
|
#endif
|
|
return GetThreadForNativeCallback(callback_id,
|
|
reinterpret_cast<uword>(return_address));
|
|
}
|
|
|
|
// This is called by a native callback trampoline
|
|
// (see StubCodeCompiler::GenerateJITCallbackTrampolines). There is no need to
|
|
// check the return address because the trampoline will use the callback ID to
|
|
// look up the generated code. We still check that the callback ID is valid for
|
|
// this isolate.
|
|
extern "C" Thread* DLRT_GetThreadForNativeCallbackTrampoline(
|
|
uword callback_id) {
|
|
CHECK_STACK_ALIGNMENT;
|
|
return GetThreadForNativeCallback(callback_id, 0);
|
|
}
|
|
|
|
} // namespace dart
|