mirror of
https://github.com/dart-lang/sdk
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[vm/regexp] Ensure regex interpreter checks and yields to safepoints, handles OOB messages periodically.
Fixes https://github.com/flutter/flutter/issues/88063 Fixes https://github.com/dart-lang/sdk/issues/26041 TEST=benchmarks/EventLoopLatencyRegexp, long_regexp_process_oob_messages_test Change-Id: I2bb10b332768f794b902b58be18d437cc07a59a7 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/210065 Reviewed-by: Martin Kustermann <kustermann@google.com> Commit-Queue: Alexander Aprelev <aam@google.com>
This commit is contained in:
parent
709f87e7f3
commit
064a9a50a0
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@ -0,0 +1,29 @@
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// Copyright (c) 2021, 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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import 'dart:isolate';
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import "package:async_helper/async_helper.dart";
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import "package:expect/expect.dart";
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worker(SendPort sendPort) {
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final re = RegExp(r'(x+)*y');
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final s = 'x' * 100 + '';
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sendPort.send('worker started');
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print(re.allMatches(s).iterator.moveNext());
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}
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main() async {
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asyncStart();
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ReceivePort onExit = ReceivePort();
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ReceivePort workerStarted = ReceivePort();
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final isolate = await Isolate.spawn(worker, workerStarted.sendPort,
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onExit: onExit.sendPort, errorsAreFatal: true);
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await workerStarted.first;
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print('worker started, now killing worker');
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isolate.kill(priority: Isolate.immediate);
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await onExit.first;
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print('worker exited');
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asyncEnd();
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}
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@ -0,0 +1,29 @@
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// Copyright (c) 2021, 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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import 'dart:isolate';
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import "package:async_helper/async_helper.dart";
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import "package:expect/expect.dart";
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worker(SendPort sendPort) {
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final re = RegExp(r'(x+)*y');
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final s = 'x' * 100 + '';
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sendPort.send('worker started');
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print(re.allMatches(s).iterator.moveNext());
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}
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main() async {
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asyncStart();
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ReceivePort onExit = ReceivePort();
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ReceivePort workerStarted = ReceivePort();
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final isolate = await Isolate.spawn(worker, workerStarted.sendPort,
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onExit: onExit.sendPort, errorsAreFatal: true);
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await workerStarted.first;
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print('worker started, now killing worker');
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isolate.kill(priority: Isolate.immediate);
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await onExit.first;
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print('worker exited');
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asyncEnd();
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}
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@ -468,13 +468,13 @@ static intptr_t Prepare(const RegExp& regexp,
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(regexp.num_bracket_expressions() + 1) * 2;
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}
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static IrregexpInterpreter::IrregexpResult ExecRaw(const RegExp& regexp,
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const String& subject,
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intptr_t index,
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bool sticky,
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int32_t* output,
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intptr_t output_size,
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Zone* zone) {
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static ObjectPtr ExecRaw(const RegExp& regexp,
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const String& subject,
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intptr_t index,
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bool sticky,
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int32_t* output,
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intptr_t output_size,
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Zone* zone) {
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bool is_one_byte =
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subject.IsOneByteString() || subject.IsExternalOneByteString();
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@ -493,14 +493,16 @@ static IrregexpInterpreter::IrregexpResult ExecRaw(const RegExp& regexp,
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const TypedData& bytecode =
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TypedData::Handle(zone, regexp.bytecode(is_one_byte, sticky));
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ASSERT(!bytecode.IsNull());
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IrregexpInterpreter::IrregexpResult result =
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IrregexpInterpreter::Match(bytecode, subject, raw_output, index, zone);
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const Object& result = Object::Handle(
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zone,
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IrregexpInterpreter::Match(bytecode, subject, raw_output, index, zone));
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if (result == IrregexpInterpreter::RE_SUCCESS) {
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if (result.ptr() == Bool::True().ptr()) {
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// Copy capture results to the start of the registers array.
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memmove(output, raw_output, number_of_capture_registers * sizeof(int32_t));
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}
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if (result == IrregexpInterpreter::RE_EXCEPTION) {
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if (result.ptr() == Object::null()) {
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// Exception during regexp processing
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Thread* thread = Thread::Current();
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auto isolate_group = thread->isolate_group();
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const Instance& exception =
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Exceptions::Throw(thread, exception);
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UNREACHABLE();
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}
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return result;
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return result.ptr();
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}
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InstancePtr BytecodeRegExpMacroAssembler::Interpret(const RegExp& regexp,
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const String& subject,
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const Smi& start_index,
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bool sticky,
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Zone* zone) {
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ObjectPtr BytecodeRegExpMacroAssembler::Interpret(const RegExp& regexp,
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const String& subject,
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const Smi& start_index,
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bool sticky,
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Zone* zone) {
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intptr_t required_registers = Prepare(regexp, subject, sticky, zone);
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if (required_registers < 0) {
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// Compiling failed with an exception.
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@ -525,11 +527,10 @@ InstancePtr BytecodeRegExpMacroAssembler::Interpret(const RegExp& regexp,
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// V8 uses a shared copy on the isolate when smaller than some threshold.
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int32_t* output_registers = zone->Alloc<int32_t>(required_registers);
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IrregexpInterpreter::IrregexpResult result =
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ExecRaw(regexp, subject, start_index.Value(), sticky, output_registers,
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required_registers, zone);
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if (result == IrregexpInterpreter::RE_SUCCESS) {
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const Object& result =
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Object::Handle(zone, ExecRaw(regexp, subject, start_index.Value(), sticky,
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output_registers, required_registers, zone));
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if (result.ptr() == Bool::True().ptr()) {
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intptr_t capture_count = regexp.num_bracket_expressions();
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intptr_t capture_register_count = (capture_count + 1) * 2;
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ASSERT(required_registers >= capture_register_count);
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return result.ptr();
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}
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if (result == IrregexpInterpreter::RE_EXCEPTION) {
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if (result.ptr() == Object::null()) {
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// internal exception
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UNREACHABLE();
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}
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ASSERT(result == IrregexpInterpreter::RE_FAILURE);
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if (result.IsError()) {
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Exceptions::PropagateError(Error::Cast(result));
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UNREACHABLE();
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}
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ASSERT(result.ptr() == Bool::False().ptr());
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return Instance::null();
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}
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@ -107,11 +107,11 @@ class BytecodeRegExpMacroAssembler : public RegExpMacroAssembler {
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virtual void PrintBlocks() { UNIMPLEMENTED(); }
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/////
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static InstancePtr Interpret(const RegExp& regexp,
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const String& str,
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const Smi& start_index,
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bool is_sticky,
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Zone* zone);
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static ObjectPtr Interpret(const RegExp& regexp,
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const String& str,
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const Smi& start_index,
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bool is_sticky,
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Zone* zone);
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private:
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void Expand();
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@ -4,11 +4,12 @@
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// A simple interpreter for the Irregexp byte code.
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#include "vm/regexp_interpreter.h"
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#include <memory>
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#include <utility>
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#include "heap/safepoint.h"
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#include "vm/regexp_interpreter.h"
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#include "platform/unicode.h"
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#include "vm/object.h"
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#include "vm/regexp_assembler.h"
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DISALLOW_COPY_AND_ASSIGN(BacktrackStack);
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};
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// Returns True if success, False if failure, Null if internal exception,
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// Error if VM error needs to be propagated up the callchain.
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template <typename Char>
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static IrregexpInterpreter::IrregexpResult RawMatch(const uint8_t* code_base,
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const String& subject,
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int32_t* registers,
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intptr_t current,
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uint32_t current_char,
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Zone* zone) {
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const uint8_t* pc = code_base;
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static ObjectPtr RawMatch(const TypedData& bytecode,
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const String& subject,
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int32_t* registers,
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intptr_t current,
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uint32_t current_char,
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Zone* zone) {
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const auto thread = Thread::Current();
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// BacktrackStack ensures that the memory allocated for the backtracking stack
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// is returned to the system or cached if there is no stack being cached at
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// the moment.
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OS::PrintErr("Start irregexp bytecode interpreter\n");
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}
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#endif
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const uint8_t* code_base;
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const uint8_t* pc;
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{
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NoSafepointScope no_safepoint;
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code_base = reinterpret_cast<uint8_t*>(bytecode.DataAddr(0));
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pc = code_base;
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}
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while (true) {
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int32_t insn = Load32Aligned(pc);
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switch (insn & BYTECODE_MASK) {
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BYTECODE(BREAK)
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UNREACHABLE();
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return IrregexpInterpreter::RE_FAILURE;
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BYTECODE(PUSH_CP)
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if (--backtrack_stack_space < 0) {
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return IrregexpInterpreter::RE_EXCEPTION;
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if (UNLIKELY(thread->HasScheduledInterrupts())) {
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intptr_t pc_offset = pc - code_base;
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ErrorPtr error = thread->HandleInterrupts();
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if (error != Object::null()) {
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// Needs to be propagated to the Dart native invoking the
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// regex matcher.
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return error;
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}
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*backtrack_sp++ = current;
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pc += BC_PUSH_CP_LENGTH;
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break;
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BYTECODE(PUSH_BT)
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if (--backtrack_stack_space < 0) {
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return IrregexpInterpreter::RE_EXCEPTION;
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}
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*backtrack_sp++ = Load32Aligned(pc + 4);
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pc += BC_PUSH_BT_LENGTH;
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break;
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BYTECODE(PUSH_REGISTER)
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if (--backtrack_stack_space < 0) {
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return IrregexpInterpreter::RE_EXCEPTION;
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}
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*backtrack_sp++ = registers[insn >> BYTECODE_SHIFT];
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pc += BC_PUSH_REGISTER_LENGTH;
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break;
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BYTECODE(SET_REGISTER)
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registers[insn >> BYTECODE_SHIFT] = Load32Aligned(pc + 4);
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pc += BC_SET_REGISTER_LENGTH;
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break;
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BYTECODE(ADVANCE_REGISTER)
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registers[insn >> BYTECODE_SHIFT] += Load32Aligned(pc + 4);
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pc += BC_ADVANCE_REGISTER_LENGTH;
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break;
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BYTECODE(SET_REGISTER_TO_CP)
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registers[insn >> BYTECODE_SHIFT] = current + Load32Aligned(pc + 4);
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pc += BC_SET_REGISTER_TO_CP_LENGTH;
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break;
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BYTECODE(SET_CP_TO_REGISTER)
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current = registers[insn >> BYTECODE_SHIFT];
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pc += BC_SET_CP_TO_REGISTER_LENGTH;
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break;
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BYTECODE(SET_REGISTER_TO_SP)
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registers[insn >> BYTECODE_SHIFT] =
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static_cast<int>(backtrack_sp - backtrack_stack_base);
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pc += BC_SET_REGISTER_TO_SP_LENGTH;
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break;
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BYTECODE(SET_SP_TO_REGISTER)
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backtrack_sp = backtrack_stack_base + registers[insn >> BYTECODE_SHIFT];
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backtrack_stack_space =
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backtrack_stack.max_size() -
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static_cast<int>(backtrack_sp - backtrack_stack_base);
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pc += BC_SET_SP_TO_REGISTER_LENGTH;
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break;
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BYTECODE(POP_CP)
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backtrack_stack_space++;
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--backtrack_sp;
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current = *backtrack_sp;
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pc += BC_POP_CP_LENGTH;
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break;
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BYTECODE(POP_BT)
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backtrack_stack_space++;
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--backtrack_sp;
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pc = code_base + *backtrack_sp;
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break;
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BYTECODE(POP_REGISTER)
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backtrack_stack_space++;
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--backtrack_sp;
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registers[insn >> BYTECODE_SHIFT] = *backtrack_sp;
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pc += BC_POP_REGISTER_LENGTH;
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break;
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BYTECODE(FAIL)
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return IrregexpInterpreter::RE_FAILURE;
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BYTECODE(SUCCEED)
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return IrregexpInterpreter::RE_SUCCESS;
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BYTECODE(ADVANCE_CP)
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current += insn >> BYTECODE_SHIFT;
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pc += BC_ADVANCE_CP_LENGTH;
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break;
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BYTECODE(GOTO)
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pc = code_base + Load32Aligned(pc + 4);
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break;
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BYTECODE(ADVANCE_CP_AND_GOTO)
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current += insn >> BYTECODE_SHIFT;
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pc = code_base + Load32Aligned(pc + 4);
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break;
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BYTECODE(CHECK_GREEDY)
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if (current == backtrack_sp[-1]) {
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backtrack_sp--;
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NoSafepointScope no_safepoint;
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code_base = reinterpret_cast<uint8_t*>(bytecode.DataAddr(0));
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pc = code_base + pc_offset;
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}
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NoSafepointScope no_safepoint;
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bool check_for_safepoint_now = false;
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while (!check_for_safepoint_now) {
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int32_t insn = Load32Aligned(pc);
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switch (insn & BYTECODE_MASK) {
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BYTECODE(BREAK)
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UNREACHABLE();
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return Bool::False().ptr();
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BYTECODE(PUSH_CP)
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if (--backtrack_stack_space < 0) {
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return Object::null();
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}
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*backtrack_sp++ = current;
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pc += BC_PUSH_CP_LENGTH;
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break;
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BYTECODE(PUSH_BT)
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if (--backtrack_stack_space < 0) {
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return Object::null();
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}
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*backtrack_sp++ = Load32Aligned(pc + 4);
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pc += BC_PUSH_BT_LENGTH;
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break;
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BYTECODE(PUSH_REGISTER)
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if (--backtrack_stack_space < 0) {
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return Object::null();
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}
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*backtrack_sp++ = registers[insn >> BYTECODE_SHIFT];
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pc += BC_PUSH_REGISTER_LENGTH;
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break;
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BYTECODE(SET_REGISTER)
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registers[insn >> BYTECODE_SHIFT] = Load32Aligned(pc + 4);
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pc += BC_SET_REGISTER_LENGTH;
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break;
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BYTECODE(ADVANCE_REGISTER)
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registers[insn >> BYTECODE_SHIFT] += Load32Aligned(pc + 4);
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pc += BC_ADVANCE_REGISTER_LENGTH;
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break;
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BYTECODE(SET_REGISTER_TO_CP)
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registers[insn >> BYTECODE_SHIFT] = current + Load32Aligned(pc + 4);
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pc += BC_SET_REGISTER_TO_CP_LENGTH;
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break;
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BYTECODE(SET_CP_TO_REGISTER)
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current = registers[insn >> BYTECODE_SHIFT];
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pc += BC_SET_CP_TO_REGISTER_LENGTH;
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break;
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BYTECODE(SET_REGISTER_TO_SP)
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registers[insn >> BYTECODE_SHIFT] =
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static_cast<int>(backtrack_sp - backtrack_stack_base);
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pc += BC_SET_REGISTER_TO_SP_LENGTH;
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break;
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BYTECODE(SET_SP_TO_REGISTER)
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backtrack_sp = backtrack_stack_base + registers[insn >> BYTECODE_SHIFT];
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backtrack_stack_space =
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backtrack_stack.max_size() -
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static_cast<int>(backtrack_sp - backtrack_stack_base);
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pc += BC_SET_SP_TO_REGISTER_LENGTH;
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break;
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BYTECODE(POP_CP)
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backtrack_stack_space++;
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--backtrack_sp;
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current = *backtrack_sp;
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pc += BC_POP_CP_LENGTH;
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break;
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BYTECODE(POP_BT)
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backtrack_stack_space++;
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--backtrack_sp;
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pc = code_base + *backtrack_sp;
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// This should match check cadence in JIT irregexp implementation.
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check_for_safepoint_now = true;
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break;
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BYTECODE(POP_REGISTER)
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backtrack_stack_space++;
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--backtrack_sp;
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registers[insn >> BYTECODE_SHIFT] = *backtrack_sp;
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pc += BC_POP_REGISTER_LENGTH;
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break;
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BYTECODE(FAIL)
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return Bool::False().ptr();
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BYTECODE(SUCCEED)
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return Bool::True().ptr();
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BYTECODE(ADVANCE_CP)
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current += insn >> BYTECODE_SHIFT;
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pc += BC_ADVANCE_CP_LENGTH;
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break;
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BYTECODE(GOTO)
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pc = code_base + Load32Aligned(pc + 4);
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} else {
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pc += BC_CHECK_GREEDY_LENGTH;
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}
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break;
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BYTECODE(LOAD_CURRENT_CHAR) {
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int pos = current + (insn >> BYTECODE_SHIFT);
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if (pos < 0 || pos >= subject_length) {
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break;
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BYTECODE(ADVANCE_CP_AND_GOTO)
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current += insn >> BYTECODE_SHIFT;
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pc = code_base + Load32Aligned(pc + 4);
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break;
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BYTECODE(CHECK_GREEDY)
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||||
if (current == backtrack_sp[-1]) {
|
||||
backtrack_sp--;
|
||||
backtrack_stack_space++;
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
current_char = subject.CharAt(pos);
|
||||
pc += BC_LOAD_CURRENT_CHAR_LENGTH;
|
||||
pc += BC_CHECK_GREEDY_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(LOAD_CURRENT_CHAR_UNCHECKED) {
|
||||
int pos = current + (insn >> BYTECODE_SHIFT);
|
||||
current_char = subject.CharAt(pos);
|
||||
pc += BC_LOAD_CURRENT_CHAR_UNCHECKED_LENGTH;
|
||||
break;
|
||||
}
|
||||
BYTECODE(LOAD_2_CURRENT_CHARS) {
|
||||
int pos = current + (insn >> BYTECODE_SHIFT);
|
||||
if (pos + 2 > subject_length) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
BYTECODE(LOAD_CURRENT_CHAR) {
|
||||
int pos = current + (insn >> BYTECODE_SHIFT);
|
||||
if (pos < 0 || pos >= subject_length) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
current_char = subject.CharAt(pos);
|
||||
pc += BC_LOAD_CURRENT_CHAR_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(LOAD_CURRENT_CHAR_UNCHECKED) {
|
||||
int pos = current + (insn >> BYTECODE_SHIFT);
|
||||
current_char = subject.CharAt(pos);
|
||||
pc += BC_LOAD_CURRENT_CHAR_UNCHECKED_LENGTH;
|
||||
break;
|
||||
}
|
||||
BYTECODE(LOAD_2_CURRENT_CHARS) {
|
||||
int pos = current + (insn >> BYTECODE_SHIFT);
|
||||
if (pos + 2 > subject_length) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
Char next = subject.CharAt(pos + 1);
|
||||
current_char =
|
||||
subject.CharAt(pos) | (next << (kBitsPerByte * sizeof(Char)));
|
||||
pc += BC_LOAD_2_CURRENT_CHARS_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(LOAD_2_CURRENT_CHARS_UNCHECKED) {
|
||||
int pos = current + (insn >> BYTECODE_SHIFT);
|
||||
Char next = subject.CharAt(pos + 1);
|
||||
current_char =
|
||||
subject.CharAt(pos) | (next << (kBitsPerByte * sizeof(Char)));
|
||||
pc += BC_LOAD_2_CURRENT_CHARS_LENGTH;
|
||||
pc += BC_LOAD_2_CURRENT_CHARS_UNCHECKED_LENGTH;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(LOAD_2_CURRENT_CHARS_UNCHECKED) {
|
||||
int pos = current + (insn >> BYTECODE_SHIFT);
|
||||
Char next = subject.CharAt(pos + 1);
|
||||
current_char =
|
||||
subject.CharAt(pos) | (next << (kBitsPerByte * sizeof(Char)));
|
||||
pc += BC_LOAD_2_CURRENT_CHARS_UNCHECKED_LENGTH;
|
||||
break;
|
||||
}
|
||||
BYTECODE(LOAD_4_CURRENT_CHARS) {
|
||||
ASSERT(sizeof(Char) == 1);
|
||||
int pos = current + (insn >> BYTECODE_SHIFT);
|
||||
if (pos + 4 > subject_length) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
BYTECODE(LOAD_4_CURRENT_CHARS) {
|
||||
ASSERT(sizeof(Char) == 1);
|
||||
int pos = current + (insn >> BYTECODE_SHIFT);
|
||||
if (pos + 4 > subject_length) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
Char next1 = subject.CharAt(pos + 1);
|
||||
Char next2 = subject.CharAt(pos + 2);
|
||||
Char next3 = subject.CharAt(pos + 3);
|
||||
current_char = (subject.CharAt(pos) | (next1 << 8) | (next2 << 16) |
|
||||
(next3 << 24));
|
||||
pc += BC_LOAD_4_CURRENT_CHARS_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(LOAD_4_CURRENT_CHARS_UNCHECKED) {
|
||||
ASSERT(sizeof(Char) == 1);
|
||||
int pos = current + (insn >> BYTECODE_SHIFT);
|
||||
Char next1 = subject.CharAt(pos + 1);
|
||||
Char next2 = subject.CharAt(pos + 2);
|
||||
Char next3 = subject.CharAt(pos + 3);
|
||||
current_char = (subject.CharAt(pos) | (next1 << 8) | (next2 << 16) |
|
||||
(next3 << 24));
|
||||
pc += BC_LOAD_4_CURRENT_CHARS_LENGTH;
|
||||
pc += BC_LOAD_4_CURRENT_CHARS_UNCHECKED_LENGTH;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(LOAD_4_CURRENT_CHARS_UNCHECKED) {
|
||||
ASSERT(sizeof(Char) == 1);
|
||||
int pos = current + (insn >> BYTECODE_SHIFT);
|
||||
Char next1 = subject.CharAt(pos + 1);
|
||||
Char next2 = subject.CharAt(pos + 2);
|
||||
Char next3 = subject.CharAt(pos + 3);
|
||||
current_char = (subject.CharAt(pos) | (next1 << 8) | (next2 << 16) |
|
||||
(next3 << 24));
|
||||
pc += BC_LOAD_4_CURRENT_CHARS_UNCHECKED_LENGTH;
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_4_CHARS) {
|
||||
uint32_t c = Load32Aligned(pc + 4);
|
||||
if (c == current_char) {
|
||||
BYTECODE(CHECK_4_CHARS) {
|
||||
uint32_t c = Load32Aligned(pc + 4);
|
||||
if (c == current_char) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_CHECK_4_CHARS_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_CHAR) {
|
||||
uint32_t c = (insn >> BYTECODE_SHIFT);
|
||||
if (c == current_char) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
pc += BC_CHECK_CHAR_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_NOT_4_CHARS) {
|
||||
uint32_t c = Load32Aligned(pc + 4);
|
||||
if (c != current_char) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_CHECK_NOT_4_CHARS_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_NOT_CHAR) {
|
||||
uint32_t c = (insn >> BYTECODE_SHIFT);
|
||||
if (c != current_char) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
pc += BC_CHECK_NOT_CHAR_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(AND_CHECK_4_CHARS) {
|
||||
uint32_t c = Load32Aligned(pc + 4);
|
||||
if (c == (current_char & Load32Aligned(pc + 8))) {
|
||||
pc = code_base + Load32Aligned(pc + 12);
|
||||
} else {
|
||||
pc += BC_AND_CHECK_4_CHARS_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(AND_CHECK_CHAR) {
|
||||
uint32_t c = (insn >> BYTECODE_SHIFT);
|
||||
if (c == (current_char & Load32Aligned(pc + 4))) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_AND_CHECK_CHAR_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(AND_CHECK_NOT_4_CHARS) {
|
||||
uint32_t c = Load32Aligned(pc + 4);
|
||||
if (c != (current_char & Load32Aligned(pc + 8))) {
|
||||
pc = code_base + Load32Aligned(pc + 12);
|
||||
} else {
|
||||
pc += BC_AND_CHECK_NOT_4_CHARS_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(AND_CHECK_NOT_CHAR) {
|
||||
uint32_t c = (insn >> BYTECODE_SHIFT);
|
||||
if (c != (current_char & Load32Aligned(pc + 4))) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_AND_CHECK_NOT_CHAR_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(MINUS_AND_CHECK_NOT_CHAR) {
|
||||
uint32_t c = (insn >> BYTECODE_SHIFT);
|
||||
uint32_t minus = Load16Aligned(pc + 4);
|
||||
uint32_t mask = Load16Aligned(pc + 6);
|
||||
if (c != ((current_char - minus) & mask)) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_MINUS_AND_CHECK_NOT_CHAR_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_CHAR_IN_RANGE) {
|
||||
uint32_t from = Load16Aligned(pc + 4);
|
||||
uint32_t to = Load16Aligned(pc + 6);
|
||||
if (from <= current_char && current_char <= to) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_CHECK_CHAR_IN_RANGE_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_CHAR_NOT_IN_RANGE) {
|
||||
uint32_t from = Load16Aligned(pc + 4);
|
||||
uint32_t to = Load16Aligned(pc + 6);
|
||||
if (from > current_char || current_char > to) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_CHECK_CHAR_NOT_IN_RANGE_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_BIT_IN_TABLE) {
|
||||
int mask = RegExpMacroAssembler::kTableMask;
|
||||
uint8_t b = pc[8 + ((current_char & mask) >> kBitsPerByteLog2)];
|
||||
int bit = (current_char & (kBitsPerByte - 1));
|
||||
if ((b & (1 << bit)) != 0) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
pc += BC_CHECK_BIT_IN_TABLE_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_LT) {
|
||||
uint32_t limit = (insn >> BYTECODE_SHIFT);
|
||||
if (current_char < limit) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
pc += BC_CHECK_LT_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_GT) {
|
||||
uint32_t limit = (insn >> BYTECODE_SHIFT);
|
||||
if (current_char > limit) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
pc += BC_CHECK_GT_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_REGISTER_LT)
|
||||
if (registers[insn >> BYTECODE_SHIFT] < Load32Aligned(pc + 4)) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_CHECK_4_CHARS_LENGTH;
|
||||
pc += BC_CHECK_REGISTER_LT_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_CHAR) {
|
||||
uint32_t c = (insn >> BYTECODE_SHIFT);
|
||||
if (c == current_char) {
|
||||
BYTECODE(CHECK_REGISTER_GE)
|
||||
if (registers[insn >> BYTECODE_SHIFT] >= Load32Aligned(pc + 4)) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_CHECK_REGISTER_GE_LENGTH;
|
||||
}
|
||||
break;
|
||||
BYTECODE(CHECK_REGISTER_EQ_POS)
|
||||
if (registers[insn >> BYTECODE_SHIFT] == current) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
pc += BC_CHECK_CHAR_LENGTH;
|
||||
pc += BC_CHECK_REGISTER_EQ_POS_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_NOT_4_CHARS) {
|
||||
uint32_t c = Load32Aligned(pc + 4);
|
||||
if (c != current_char) {
|
||||
BYTECODE(CHECK_NOT_REGS_EQUAL)
|
||||
if (registers[insn >> BYTECODE_SHIFT] ==
|
||||
registers[Load32Aligned(pc + 4)]) {
|
||||
pc += BC_CHECK_NOT_REGS_EQUAL_LENGTH;
|
||||
} else {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_CHECK_NOT_4_CHARS_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_NOT_CHAR) {
|
||||
uint32_t c = (insn >> BYTECODE_SHIFT);
|
||||
if (c != current_char) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
pc += BC_CHECK_NOT_CHAR_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(AND_CHECK_4_CHARS) {
|
||||
uint32_t c = Load32Aligned(pc + 4);
|
||||
if (c == (current_char & Load32Aligned(pc + 8))) {
|
||||
pc = code_base + Load32Aligned(pc + 12);
|
||||
} else {
|
||||
pc += BC_AND_CHECK_4_CHARS_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(AND_CHECK_CHAR) {
|
||||
uint32_t c = (insn >> BYTECODE_SHIFT);
|
||||
if (c == (current_char & Load32Aligned(pc + 4))) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_AND_CHECK_CHAR_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(AND_CHECK_NOT_4_CHARS) {
|
||||
uint32_t c = Load32Aligned(pc + 4);
|
||||
if (c != (current_char & Load32Aligned(pc + 8))) {
|
||||
pc = code_base + Load32Aligned(pc + 12);
|
||||
} else {
|
||||
pc += BC_AND_CHECK_NOT_4_CHARS_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(AND_CHECK_NOT_CHAR) {
|
||||
uint32_t c = (insn >> BYTECODE_SHIFT);
|
||||
if (c != (current_char & Load32Aligned(pc + 4))) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_AND_CHECK_NOT_CHAR_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(MINUS_AND_CHECK_NOT_CHAR) {
|
||||
uint32_t c = (insn >> BYTECODE_SHIFT);
|
||||
uint32_t minus = Load16Aligned(pc + 4);
|
||||
uint32_t mask = Load16Aligned(pc + 6);
|
||||
if (c != ((current_char - minus) & mask)) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_MINUS_AND_CHECK_NOT_CHAR_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_CHAR_IN_RANGE) {
|
||||
uint32_t from = Load16Aligned(pc + 4);
|
||||
uint32_t to = Load16Aligned(pc + 6);
|
||||
if (from <= current_char && current_char <= to) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_CHECK_CHAR_IN_RANGE_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_CHAR_NOT_IN_RANGE) {
|
||||
uint32_t from = Load16Aligned(pc + 4);
|
||||
uint32_t to = Load16Aligned(pc + 6);
|
||||
if (from > current_char || current_char > to) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_CHECK_CHAR_NOT_IN_RANGE_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_BIT_IN_TABLE) {
|
||||
int mask = RegExpMacroAssembler::kTableMask;
|
||||
uint8_t b = pc[8 + ((current_char & mask) >> kBitsPerByteLog2)];
|
||||
int bit = (current_char & (kBitsPerByte - 1));
|
||||
if ((b & (1 << bit)) != 0) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
pc += BC_CHECK_BIT_IN_TABLE_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_LT) {
|
||||
uint32_t limit = (insn >> BYTECODE_SHIFT);
|
||||
if (current_char < limit) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
pc += BC_CHECK_LT_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_GT) {
|
||||
uint32_t limit = (insn >> BYTECODE_SHIFT);
|
||||
if (current_char > limit) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
pc += BC_CHECK_GT_LENGTH;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_REGISTER_LT)
|
||||
if (registers[insn >> BYTECODE_SHIFT] < Load32Aligned(pc + 4)) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_CHECK_REGISTER_LT_LENGTH;
|
||||
}
|
||||
break;
|
||||
BYTECODE(CHECK_REGISTER_GE)
|
||||
if (registers[insn >> BYTECODE_SHIFT] >= Load32Aligned(pc + 4)) {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
} else {
|
||||
pc += BC_CHECK_REGISTER_GE_LENGTH;
|
||||
}
|
||||
break;
|
||||
BYTECODE(CHECK_REGISTER_EQ_POS)
|
||||
if (registers[insn >> BYTECODE_SHIFT] == current) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
pc += BC_CHECK_REGISTER_EQ_POS_LENGTH;
|
||||
}
|
||||
break;
|
||||
BYTECODE(CHECK_NOT_REGS_EQUAL)
|
||||
if (registers[insn >> BYTECODE_SHIFT] ==
|
||||
registers[Load32Aligned(pc + 4)]) {
|
||||
pc += BC_CHECK_NOT_REGS_EQUAL_LENGTH;
|
||||
} else {
|
||||
pc = code_base + Load32Aligned(pc + 8);
|
||||
}
|
||||
break;
|
||||
BYTECODE(CHECK_NOT_BACK_REF) {
|
||||
int from = registers[insn >> BYTECODE_SHIFT];
|
||||
int len = registers[(insn >> BYTECODE_SHIFT) + 1] - from;
|
||||
if (from < 0 || len <= 0) {
|
||||
BYTECODE(CHECK_NOT_BACK_REF) {
|
||||
int from = registers[insn >> BYTECODE_SHIFT];
|
||||
int len = registers[(insn >> BYTECODE_SHIFT) + 1] - from;
|
||||
if (from < 0 || len <= 0) {
|
||||
pc += BC_CHECK_NOT_BACK_REF_LENGTH;
|
||||
break;
|
||||
}
|
||||
if (current + len > subject_length) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
break;
|
||||
} else {
|
||||
int i;
|
||||
for (i = 0; i < len; i++) {
|
||||
if (subject.CharAt(from + i) != subject.CharAt(current + i)) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (i < len) break;
|
||||
current += len;
|
||||
}
|
||||
pc += BC_CHECK_NOT_BACK_REF_LENGTH;
|
||||
break;
|
||||
}
|
||||
if (current + len > subject_length) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
break;
|
||||
} else {
|
||||
int i;
|
||||
for (i = 0; i < len; i++) {
|
||||
if (subject.CharAt(from + i) != subject.CharAt(current + i)) {
|
||||
BYTECODE(CHECK_NOT_BACK_REF_NO_CASE_UNICODE)
|
||||
FALL_THROUGH;
|
||||
BYTECODE(CHECK_NOT_BACK_REF_NO_CASE) {
|
||||
const bool unicode =
|
||||
(insn & BYTECODE_MASK) == BC_CHECK_NOT_BACK_REF_NO_CASE_UNICODE;
|
||||
int from = registers[insn >> BYTECODE_SHIFT];
|
||||
int len = registers[(insn >> BYTECODE_SHIFT) + 1] - from;
|
||||
if (from < 0 || len <= 0) {
|
||||
pc += BC_CHECK_NOT_BACK_REF_NO_CASE_LENGTH;
|
||||
break;
|
||||
}
|
||||
if (current + len > subject_length) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
break;
|
||||
} else {
|
||||
if (BackRefMatchesNoCase<Char>(&canonicalize, from, current, len,
|
||||
subject, unicode)) {
|
||||
current += len;
|
||||
pc += BC_CHECK_NOT_BACK_REF_NO_CASE_LENGTH;
|
||||
} else {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (i < len) break;
|
||||
current += len;
|
||||
}
|
||||
pc += BC_CHECK_NOT_BACK_REF_LENGTH;
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_NOT_BACK_REF_NO_CASE_UNICODE)
|
||||
FALL_THROUGH;
|
||||
BYTECODE(CHECK_NOT_BACK_REF_NO_CASE) {
|
||||
const bool unicode =
|
||||
(insn & BYTECODE_MASK) == BC_CHECK_NOT_BACK_REF_NO_CASE_UNICODE;
|
||||
int from = registers[insn >> BYTECODE_SHIFT];
|
||||
int len = registers[(insn >> BYTECODE_SHIFT) + 1] - from;
|
||||
if (from < 0 || len <= 0) {
|
||||
pc += BC_CHECK_NOT_BACK_REF_NO_CASE_LENGTH;
|
||||
break;
|
||||
}
|
||||
if (current + len > subject_length) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
break;
|
||||
} else {
|
||||
if (BackRefMatchesNoCase<Char>(&canonicalize, from, current, len,
|
||||
subject, unicode)) {
|
||||
current += len;
|
||||
pc += BC_CHECK_NOT_BACK_REF_NO_CASE_LENGTH;
|
||||
} else {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
BYTECODE(CHECK_NOT_BACK_REF_BACKWARD) {
|
||||
const int from = registers[insn >> BYTECODE_SHIFT];
|
||||
const int len = registers[(insn >> BYTECODE_SHIFT) + 1] - from;
|
||||
if (from < 0 || len <= 0) {
|
||||
pc += BC_CHECK_NOT_BACK_REF_BACKWARD_LENGTH;
|
||||
break;
|
||||
}
|
||||
if ((current - len) < 0) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
break;
|
||||
} else {
|
||||
// When looking behind, the string to match (if it is there) lies
|
||||
// before the current position, so we will check the [len]
|
||||
// characters before the current position, excluding the current
|
||||
// position itself.
|
||||
const int start = current - len;
|
||||
int i;
|
||||
for (i = 0; i < len; i++) {
|
||||
if (subject.CharAt(from + i) != subject.CharAt(start + i)) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (i < len) break;
|
||||
current -= len;
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_NOT_BACK_REF_BACKWARD) {
|
||||
const int from = registers[insn >> BYTECODE_SHIFT];
|
||||
const int len = registers[(insn >> BYTECODE_SHIFT) + 1] - from;
|
||||
if (from < 0 || len <= 0) {
|
||||
pc += BC_CHECK_NOT_BACK_REF_BACKWARD_LENGTH;
|
||||
break;
|
||||
}
|
||||
if ((current - len) < 0) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
break;
|
||||
} else {
|
||||
// When looking behind, the string to match (if it is there) lies
|
||||
// before the current position, so we will check the [len] characters
|
||||
// before the current position, excluding the current position itself.
|
||||
const int start = current - len;
|
||||
int i;
|
||||
for (i = 0; i < len; i++) {
|
||||
if (subject.CharAt(from + i) != subject.CharAt(start + i)) {
|
||||
BYTECODE(CHECK_NOT_BACK_REF_NO_CASE_UNICODE_BACKWARD)
|
||||
FALL_THROUGH;
|
||||
BYTECODE(CHECK_NOT_BACK_REF_NO_CASE_BACKWARD) {
|
||||
bool unicode = (insn & BYTECODE_MASK) ==
|
||||
BC_CHECK_NOT_BACK_REF_NO_CASE_UNICODE_BACKWARD;
|
||||
int from = registers[insn >> BYTECODE_SHIFT];
|
||||
int len = registers[(insn >> BYTECODE_SHIFT) + 1] - from;
|
||||
if (from < 0 || len <= 0) {
|
||||
pc += BC_CHECK_NOT_BACK_REF_NO_CASE_BACKWARD_LENGTH;
|
||||
break;
|
||||
}
|
||||
if (current < len) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
break;
|
||||
} else {
|
||||
if (BackRefMatchesNoCase<Char>(&canonicalize, from, current - len,
|
||||
len, subject, unicode)) {
|
||||
current -= len;
|
||||
pc += BC_CHECK_NOT_BACK_REF_NO_CASE_BACKWARD_LENGTH;
|
||||
} else {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (i < len) break;
|
||||
current -= len;
|
||||
}
|
||||
pc += BC_CHECK_NOT_BACK_REF_BACKWARD_LENGTH;
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_NOT_BACK_REF_NO_CASE_UNICODE_BACKWARD)
|
||||
FALL_THROUGH;
|
||||
BYTECODE(CHECK_NOT_BACK_REF_NO_CASE_BACKWARD) {
|
||||
bool unicode = (insn & BYTECODE_MASK) ==
|
||||
BC_CHECK_NOT_BACK_REF_NO_CASE_UNICODE_BACKWARD;
|
||||
int from = registers[insn >> BYTECODE_SHIFT];
|
||||
int len = registers[(insn >> BYTECODE_SHIFT) + 1] - from;
|
||||
if (from < 0 || len <= 0) {
|
||||
pc += BC_CHECK_NOT_BACK_REF_NO_CASE_BACKWARD_LENGTH;
|
||||
break;
|
||||
}
|
||||
if (current < len) {
|
||||
BYTECODE(CHECK_AT_START)
|
||||
if (current == 0) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
break;
|
||||
} else {
|
||||
if (BackRefMatchesNoCase<Char>(&canonicalize, from, current - len,
|
||||
len, subject, unicode)) {
|
||||
current -= len;
|
||||
pc += BC_CHECK_NOT_BACK_REF_NO_CASE_BACKWARD_LENGTH;
|
||||
pc += BC_CHECK_AT_START_LENGTH;
|
||||
}
|
||||
break;
|
||||
BYTECODE(CHECK_NOT_AT_START) {
|
||||
const int32_t cp_offset = insn >> BYTECODE_SHIFT;
|
||||
if (current + cp_offset == 0) {
|
||||
pc += BC_CHECK_NOT_AT_START_LENGTH;
|
||||
} else {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
}
|
||||
break;
|
||||
}
|
||||
break;
|
||||
}
|
||||
BYTECODE(CHECK_AT_START)
|
||||
if (current == 0) {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
} else {
|
||||
pc += BC_CHECK_AT_START_LENGTH;
|
||||
}
|
||||
break;
|
||||
BYTECODE(CHECK_NOT_AT_START) {
|
||||
const int32_t cp_offset = insn >> BYTECODE_SHIFT;
|
||||
if (current + cp_offset == 0) {
|
||||
pc += BC_CHECK_NOT_AT_START_LENGTH;
|
||||
} else {
|
||||
pc = code_base + Load32Aligned(pc + 4);
|
||||
BYTECODE(SET_CURRENT_POSITION_FROM_END) {
|
||||
int by = static_cast<uint32_t>(insn) >> BYTECODE_SHIFT;
|
||||
if (subject_length - current > by) {
|
||||
current = subject_length - by;
|
||||
current_char = subject.CharAt(current - 1);
|
||||
}
|
||||
pc += BC_SET_CURRENT_POSITION_FROM_END_LENGTH;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
UNREACHABLE();
|
||||
break;
|
||||
}
|
||||
BYTECODE(SET_CURRENT_POSITION_FROM_END) {
|
||||
int by = static_cast<uint32_t>(insn) >> BYTECODE_SHIFT;
|
||||
if (subject_length - current > by) {
|
||||
current = subject_length - by;
|
||||
current_char = subject.CharAt(current - 1);
|
||||
}
|
||||
pc += BC_SET_CURRENT_POSITION_FROM_END_LENGTH;
|
||||
break;
|
||||
}
|
||||
default:
|
||||
UNREACHABLE();
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
IrregexpInterpreter::IrregexpResult IrregexpInterpreter::Match(
|
||||
const TypedData& bytecode,
|
||||
const String& subject,
|
||||
int32_t* registers,
|
||||
intptr_t start_position,
|
||||
Zone* zone) {
|
||||
NoSafepointScope no_safepoint;
|
||||
const uint8_t* code_base = reinterpret_cast<uint8_t*>(bytecode.DataAddr(0));
|
||||
|
||||
// Returns True if success, False if failure, Null if internal exception,
|
||||
// Error if VM error needs to be propagated up the callchain.
|
||||
ObjectPtr IrregexpInterpreter::Match(const TypedData& bytecode,
|
||||
const String& subject,
|
||||
int32_t* registers,
|
||||
intptr_t start_position,
|
||||
Zone* zone) {
|
||||
uint16_t previous_char = '\n';
|
||||
if (start_position != 0) {
|
||||
previous_char = subject.CharAt(start_position - 1);
|
||||
}
|
||||
|
||||
if (subject.IsOneByteString() || subject.IsExternalOneByteString()) {
|
||||
return RawMatch<uint8_t>(code_base, subject, registers, start_position,
|
||||
return RawMatch<uint8_t>(bytecode, subject, registers, start_position,
|
||||
previous_char, zone);
|
||||
} else if (subject.IsTwoByteString() || subject.IsExternalTwoByteString()) {
|
||||
return RawMatch<uint16_t>(code_base, subject, registers, start_position,
|
||||
return RawMatch<uint16_t>(bytecode, subject, registers, start_position,
|
||||
previous_char, zone);
|
||||
} else {
|
||||
UNREACHABLE();
|
||||
return IrregexpInterpreter::RE_FAILURE;
|
||||
return Bool::False().ptr();
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
@ -15,13 +15,14 @@ namespace dart {
|
|||
|
||||
class IrregexpInterpreter : public AllStatic {
|
||||
public:
|
||||
enum IrregexpResult { RE_FAILURE = 0, RE_SUCCESS = 1, RE_EXCEPTION = -1 };
|
||||
|
||||
static IrregexpResult Match(const TypedData& bytecode,
|
||||
const String& subject,
|
||||
int32_t* captures,
|
||||
intptr_t start_position,
|
||||
Zone* zone);
|
||||
// Returns True in case of a success, False in case of a failure,
|
||||
// Null in case of internal exception,
|
||||
// Error in case VM error has to propagated up to the caller.
|
||||
static ObjectPtr Match(const TypedData& bytecode,
|
||||
const String& subject,
|
||||
int32_t* captures,
|
||||
intptr_t start_position,
|
||||
Zone* zone);
|
||||
};
|
||||
|
||||
} // namespace dart
|
||||
|
|
Loading…
Reference in a new issue