291781ed3c
Review URL: http://codereview.chromium.org/6997015 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7845 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
472 lines
12 KiB
C++
472 lines
12 KiB
C++
// Copyright 2008-2009 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h"
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#include "ast.h"
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#include "bytecodes-irregexp.h"
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#include "regexp-macro-assembler.h"
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#include "regexp-macro-assembler-irregexp.h"
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#include "regexp-macro-assembler-irregexp-inl.h"
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namespace v8 {
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namespace internal {
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#ifdef V8_INTERPRETED_REGEXP
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RegExpMacroAssemblerIrregexp::RegExpMacroAssemblerIrregexp(Vector<byte> buffer)
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: buffer_(buffer),
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pc_(0),
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own_buffer_(false),
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advance_current_end_(kInvalidPC) {
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}
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RegExpMacroAssemblerIrregexp::~RegExpMacroAssemblerIrregexp() {
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if (backtrack_.is_linked()) backtrack_.Unuse();
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if (own_buffer_) buffer_.Dispose();
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}
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RegExpMacroAssemblerIrregexp::IrregexpImplementation
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RegExpMacroAssemblerIrregexp::Implementation() {
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return kBytecodeImplementation;
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}
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void RegExpMacroAssemblerIrregexp::Bind(Label* l) {
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advance_current_end_ = kInvalidPC;
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ASSERT(!l->is_bound());
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if (l->is_linked()) {
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int pos = l->pos();
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while (pos != 0) {
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int fixup = pos;
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pos = *reinterpret_cast<int32_t*>(buffer_.start() + fixup);
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*reinterpret_cast<uint32_t*>(buffer_.start() + fixup) = pc_;
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}
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}
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l->bind_to(pc_);
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}
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void RegExpMacroAssemblerIrregexp::EmitOrLink(Label* l) {
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if (l == NULL) l = &backtrack_;
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if (l->is_bound()) {
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Emit32(l->pos());
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} else {
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int pos = 0;
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if (l->is_linked()) {
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pos = l->pos();
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}
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l->link_to(pc_);
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Emit32(pos);
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}
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}
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void RegExpMacroAssemblerIrregexp::PopRegister(int register_index) {
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ASSERT(register_index >= 0);
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ASSERT(register_index <= kMaxRegister);
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Emit(BC_POP_REGISTER, register_index);
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}
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void RegExpMacroAssemblerIrregexp::PushRegister(
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int register_index,
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StackCheckFlag check_stack_limit) {
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ASSERT(register_index >= 0);
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ASSERT(register_index <= kMaxRegister);
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Emit(BC_PUSH_REGISTER, register_index);
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}
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void RegExpMacroAssemblerIrregexp::WriteCurrentPositionToRegister(
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int register_index, int cp_offset) {
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ASSERT(register_index >= 0);
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ASSERT(register_index <= kMaxRegister);
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Emit(BC_SET_REGISTER_TO_CP, register_index);
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Emit32(cp_offset); // Current position offset.
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}
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void RegExpMacroAssemblerIrregexp::ClearRegisters(int reg_from, int reg_to) {
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ASSERT(reg_from <= reg_to);
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for (int reg = reg_from; reg <= reg_to; reg++) {
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SetRegister(reg, -1);
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}
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}
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void RegExpMacroAssemblerIrregexp::ReadCurrentPositionFromRegister(
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int register_index) {
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ASSERT(register_index >= 0);
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ASSERT(register_index <= kMaxRegister);
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Emit(BC_SET_CP_TO_REGISTER, register_index);
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}
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void RegExpMacroAssemblerIrregexp::WriteStackPointerToRegister(
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int register_index) {
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ASSERT(register_index >= 0);
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ASSERT(register_index <= kMaxRegister);
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Emit(BC_SET_REGISTER_TO_SP, register_index);
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}
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void RegExpMacroAssemblerIrregexp::ReadStackPointerFromRegister(
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int register_index) {
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ASSERT(register_index >= 0);
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ASSERT(register_index <= kMaxRegister);
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Emit(BC_SET_SP_TO_REGISTER, register_index);
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}
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void RegExpMacroAssemblerIrregexp::SetCurrentPositionFromEnd(int by) {
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ASSERT(is_uint24(by));
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Emit(BC_SET_CURRENT_POSITION_FROM_END, by);
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}
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void RegExpMacroAssemblerIrregexp::SetRegister(int register_index, int to) {
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ASSERT(register_index >= 0);
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ASSERT(register_index <= kMaxRegister);
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Emit(BC_SET_REGISTER, register_index);
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Emit32(to);
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}
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void RegExpMacroAssemblerIrregexp::AdvanceRegister(int register_index, int by) {
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ASSERT(register_index >= 0);
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ASSERT(register_index <= kMaxRegister);
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Emit(BC_ADVANCE_REGISTER, register_index);
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Emit32(by);
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}
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void RegExpMacroAssemblerIrregexp::PopCurrentPosition() {
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Emit(BC_POP_CP, 0);
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}
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void RegExpMacroAssemblerIrregexp::PushCurrentPosition() {
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Emit(BC_PUSH_CP, 0);
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}
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void RegExpMacroAssemblerIrregexp::Backtrack() {
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Emit(BC_POP_BT, 0);
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}
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void RegExpMacroAssemblerIrregexp::GoTo(Label* l) {
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if (advance_current_end_ == pc_) {
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// Combine advance current and goto.
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pc_ = advance_current_start_;
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Emit(BC_ADVANCE_CP_AND_GOTO, advance_current_offset_);
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EmitOrLink(l);
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advance_current_end_ = kInvalidPC;
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} else {
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// Regular goto.
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Emit(BC_GOTO, 0);
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EmitOrLink(l);
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}
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}
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void RegExpMacroAssemblerIrregexp::PushBacktrack(Label* l) {
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Emit(BC_PUSH_BT, 0);
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EmitOrLink(l);
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}
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void RegExpMacroAssemblerIrregexp::Succeed() {
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Emit(BC_SUCCEED, 0);
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}
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void RegExpMacroAssemblerIrregexp::Fail() {
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Emit(BC_FAIL, 0);
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}
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void RegExpMacroAssemblerIrregexp::AdvanceCurrentPosition(int by) {
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ASSERT(by >= kMinCPOffset);
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ASSERT(by <= kMaxCPOffset);
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advance_current_start_ = pc_;
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advance_current_offset_ = by;
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Emit(BC_ADVANCE_CP, by);
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advance_current_end_ = pc_;
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}
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void RegExpMacroAssemblerIrregexp::CheckGreedyLoop(
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Label* on_tos_equals_current_position) {
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Emit(BC_CHECK_GREEDY, 0);
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EmitOrLink(on_tos_equals_current_position);
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}
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void RegExpMacroAssemblerIrregexp::LoadCurrentCharacter(int cp_offset,
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Label* on_failure,
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bool check_bounds,
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int characters) {
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ASSERT(cp_offset >= kMinCPOffset);
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ASSERT(cp_offset <= kMaxCPOffset);
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int bytecode;
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if (check_bounds) {
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if (characters == 4) {
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bytecode = BC_LOAD_4_CURRENT_CHARS;
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} else if (characters == 2) {
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bytecode = BC_LOAD_2_CURRENT_CHARS;
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} else {
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ASSERT(characters == 1);
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bytecode = BC_LOAD_CURRENT_CHAR;
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}
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} else {
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if (characters == 4) {
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bytecode = BC_LOAD_4_CURRENT_CHARS_UNCHECKED;
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} else if (characters == 2) {
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bytecode = BC_LOAD_2_CURRENT_CHARS_UNCHECKED;
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} else {
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ASSERT(characters == 1);
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bytecode = BC_LOAD_CURRENT_CHAR_UNCHECKED;
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}
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}
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Emit(bytecode, cp_offset);
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if (check_bounds) EmitOrLink(on_failure);
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}
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void RegExpMacroAssemblerIrregexp::CheckCharacterLT(uc16 limit,
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Label* on_less) {
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Emit(BC_CHECK_LT, limit);
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EmitOrLink(on_less);
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}
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void RegExpMacroAssemblerIrregexp::CheckCharacterGT(uc16 limit,
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Label* on_greater) {
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Emit(BC_CHECK_GT, limit);
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EmitOrLink(on_greater);
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}
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void RegExpMacroAssemblerIrregexp::CheckCharacter(uint32_t c, Label* on_equal) {
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if (c > MAX_FIRST_ARG) {
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Emit(BC_CHECK_4_CHARS, 0);
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Emit32(c);
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} else {
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Emit(BC_CHECK_CHAR, c);
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}
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EmitOrLink(on_equal);
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}
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void RegExpMacroAssemblerIrregexp::CheckAtStart(Label* on_at_start) {
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Emit(BC_CHECK_AT_START, 0);
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EmitOrLink(on_at_start);
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}
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void RegExpMacroAssemblerIrregexp::CheckNotAtStart(Label* on_not_at_start) {
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Emit(BC_CHECK_NOT_AT_START, 0);
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EmitOrLink(on_not_at_start);
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}
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void RegExpMacroAssemblerIrregexp::CheckNotCharacter(uint32_t c,
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Label* on_not_equal) {
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if (c > MAX_FIRST_ARG) {
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Emit(BC_CHECK_NOT_4_CHARS, 0);
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Emit32(c);
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} else {
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Emit(BC_CHECK_NOT_CHAR, c);
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}
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EmitOrLink(on_not_equal);
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}
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void RegExpMacroAssemblerIrregexp::CheckCharacterAfterAnd(
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uint32_t c,
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uint32_t mask,
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Label* on_equal) {
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if (c > MAX_FIRST_ARG) {
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Emit(BC_AND_CHECK_4_CHARS, 0);
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Emit32(c);
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} else {
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Emit(BC_AND_CHECK_CHAR, c);
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}
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Emit32(mask);
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EmitOrLink(on_equal);
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}
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void RegExpMacroAssemblerIrregexp::CheckNotCharacterAfterAnd(
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uint32_t c,
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uint32_t mask,
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Label* on_not_equal) {
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if (c > MAX_FIRST_ARG) {
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Emit(BC_AND_CHECK_NOT_4_CHARS, 0);
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Emit32(c);
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} else {
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Emit(BC_AND_CHECK_NOT_CHAR, c);
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}
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Emit32(mask);
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EmitOrLink(on_not_equal);
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}
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void RegExpMacroAssemblerIrregexp::CheckNotCharacterAfterMinusAnd(
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uc16 c,
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uc16 minus,
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uc16 mask,
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Label* on_not_equal) {
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Emit(BC_MINUS_AND_CHECK_NOT_CHAR, c);
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Emit16(minus);
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Emit16(mask);
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EmitOrLink(on_not_equal);
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}
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void RegExpMacroAssemblerIrregexp::CheckNotBackReference(int start_reg,
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Label* on_not_equal) {
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ASSERT(start_reg >= 0);
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ASSERT(start_reg <= kMaxRegister);
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Emit(BC_CHECK_NOT_BACK_REF, start_reg);
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EmitOrLink(on_not_equal);
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}
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void RegExpMacroAssemblerIrregexp::CheckNotBackReferenceIgnoreCase(
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int start_reg,
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Label* on_not_equal) {
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ASSERT(start_reg >= 0);
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ASSERT(start_reg <= kMaxRegister);
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Emit(BC_CHECK_NOT_BACK_REF_NO_CASE, start_reg);
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EmitOrLink(on_not_equal);
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}
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void RegExpMacroAssemblerIrregexp::CheckNotRegistersEqual(int reg1,
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int reg2,
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Label* on_not_equal) {
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ASSERT(reg1 >= 0);
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ASSERT(reg1 <= kMaxRegister);
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Emit(BC_CHECK_NOT_REGS_EQUAL, reg1);
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Emit32(reg2);
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EmitOrLink(on_not_equal);
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}
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void RegExpMacroAssemblerIrregexp::CheckCharacters(
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Vector<const uc16> str,
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int cp_offset,
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Label* on_failure,
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bool check_end_of_string) {
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ASSERT(cp_offset >= kMinCPOffset);
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ASSERT(cp_offset + str.length() - 1 <= kMaxCPOffset);
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// It is vital that this loop is backwards due to the unchecked character
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// load below.
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for (int i = str.length() - 1; i >= 0; i--) {
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if (check_end_of_string && i == str.length() - 1) {
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Emit(BC_LOAD_CURRENT_CHAR, cp_offset + i);
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EmitOrLink(on_failure);
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} else {
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Emit(BC_LOAD_CURRENT_CHAR_UNCHECKED, cp_offset + i);
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}
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Emit(BC_CHECK_NOT_CHAR, str[i]);
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EmitOrLink(on_failure);
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}
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}
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void RegExpMacroAssemblerIrregexp::IfRegisterLT(int register_index,
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int comparand,
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Label* on_less_than) {
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ASSERT(register_index >= 0);
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ASSERT(register_index <= kMaxRegister);
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Emit(BC_CHECK_REGISTER_LT, register_index);
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Emit32(comparand);
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EmitOrLink(on_less_than);
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}
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void RegExpMacroAssemblerIrregexp::IfRegisterGE(int register_index,
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int comparand,
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Label* on_greater_or_equal) {
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ASSERT(register_index >= 0);
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ASSERT(register_index <= kMaxRegister);
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Emit(BC_CHECK_REGISTER_GE, register_index);
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Emit32(comparand);
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EmitOrLink(on_greater_or_equal);
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}
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void RegExpMacroAssemblerIrregexp::IfRegisterEqPos(int register_index,
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Label* on_eq) {
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ASSERT(register_index >= 0);
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ASSERT(register_index <= kMaxRegister);
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Emit(BC_CHECK_REGISTER_EQ_POS, register_index);
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EmitOrLink(on_eq);
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}
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Handle<HeapObject> RegExpMacroAssemblerIrregexp::GetCode(
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Handle<String> source) {
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Bind(&backtrack_);
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Emit(BC_POP_BT, 0);
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Handle<ByteArray> array = FACTORY->NewByteArray(length());
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Copy(array->GetDataStartAddress());
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return array;
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}
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int RegExpMacroAssemblerIrregexp::length() {
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return pc_;
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}
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void RegExpMacroAssemblerIrregexp::Copy(Address a) {
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memcpy(a, buffer_.start(), length());
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}
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void RegExpMacroAssemblerIrregexp::Expand() {
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bool old_buffer_was_our_own = own_buffer_;
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Vector<byte> old_buffer = buffer_;
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buffer_ = Vector<byte>::New(old_buffer.length() * 2);
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own_buffer_ = true;
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memcpy(buffer_.start(), old_buffer.start(), old_buffer.length());
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if (old_buffer_was_our_own) {
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old_buffer.Dispose();
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}
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}
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#endif // V8_INTERPRETED_REGEXP
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} } // namespace v8::internal
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