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[interpreter] correctly advance over debug scaling prefixes.

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R=leszeks@chromium.org, ulan@chromium.org

Bug: chromium:835973
Change-Id: I35600e1da60bb6cd3b87cd1573791355e310aa9c
Reviewed-on: https://chromium-review.googlesource.com/1032430
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52933}
This commit is contained in:
Yang Guo 2018-05-03 08:21:22 +02:00 committed by Commit Bot
parent 01712bd55c
commit 7a07d74b09
8 changed files with 342 additions and 29 deletions
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8
src/builtins/arm/builtins-arm.cc
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@ -857,9 +857,13 @@ static void AdvanceBytecodeOffsetOrReturn(MacroAssembler* masm,
Label process_bytecode, extra_wide;
STATIC_ASSERT(0 == static_cast<int>(interpreter::Bytecode::kWide));
STATIC_ASSERT(1 == static_cast<int>(interpreter::Bytecode::kExtraWide));
__ cmp(bytecode, Operand(0x1));
STATIC_ASSERT(2 == static_cast<int>(interpreter::Bytecode::kDebugBreakWide));
STATIC_ASSERT(3 ==
static_cast<int>(interpreter::Bytecode::kDebugBreakExtraWide));
__ cmp(bytecode, Operand(0x3));
__ b(hi, &process_bytecode);
__ b(eq, &extra_wide);
__ tst(bytecode, Operand(0x1));
__ b(ne, &extra_wide);
// Load the next bytecode and update table to the wide scaled table.
__ add(bytecode_offset, bytecode_offset, Operand(1));

8
src/builtins/arm64/builtins-arm64.cc
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@ -940,9 +940,13 @@ static void AdvanceBytecodeOffsetOrReturn(MacroAssembler* masm,
Label process_bytecode, extra_wide;
STATIC_ASSERT(0 == static_cast<int>(interpreter::Bytecode::kWide));
STATIC_ASSERT(1 == static_cast<int>(interpreter::Bytecode::kExtraWide));
__ Cmp(bytecode, Operand(0x1));
STATIC_ASSERT(2 == static_cast<int>(interpreter::Bytecode::kDebugBreakWide));
STATIC_ASSERT(3 ==
static_cast<int>(interpreter::Bytecode::kDebugBreakExtraWide));
__ Cmp(bytecode, Operand(0x3));
__ B(hi, &process_bytecode);
__ B(eq, &extra_wide);
__ Tst(bytecode, Operand(0x1));
__ B(ne, &extra_wide);
// Load the next bytecode and update table to the wide scaled table.
__ Add(bytecode_offset, bytecode_offset, Operand(1));

8
src/builtins/ia32/builtins-ia32.cc
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@ -796,9 +796,13 @@ static void AdvanceBytecodeOffsetOrReturn(MacroAssembler* masm,
Label process_bytecode, extra_wide;
STATIC_ASSERT(0 == static_cast<int>(interpreter::Bytecode::kWide));
STATIC_ASSERT(1 == static_cast<int>(interpreter::Bytecode::kExtraWide));
__ cmpb(bytecode, Immediate(0x1));
STATIC_ASSERT(2 == static_cast<int>(interpreter::Bytecode::kDebugBreakWide));
STATIC_ASSERT(3 ==
static_cast<int>(interpreter::Bytecode::kDebugBreakExtraWide));
__ cmpb(bytecode, Immediate(0x3));
__ j(above, &process_bytecode, Label::kNear);
__ j(equal, &extra_wide, Label::kNear);
__ test(bytecode, Immediate(0x1));
__ j(not_equal, &extra_wide, Label::kNear);
// Load the next bytecode and update table to the wide scaled table.
__ inc(bytecode_offset);

8
src/builtins/mips/builtins-mips.cc
View File

@ -836,8 +836,12 @@ static void AdvanceBytecodeOffsetOrReturn(MacroAssembler* masm,
Label process_bytecode, extra_wide;
STATIC_ASSERT(0 == static_cast<int>(interpreter::Bytecode::kWide));
STATIC_ASSERT(1 == static_cast<int>(interpreter::Bytecode::kExtraWide));
__ Branch(&process_bytecode, hi, bytecode, Operand(1));
__ Branch(&extra_wide, eq, bytecode, Operand(1));
STATIC_ASSERT(2 == static_cast<int>(interpreter::Bytecode::kDebugBreakWide));
STATIC_ASSERT(3 ==
static_cast<int>(interpreter::Bytecode::kDebugBreakExtraWide));
__ Branch(&process_bytecode, hi, bytecode, Operand(3));
__ And(scratch2, bytecode, Operand(1));
__ Branch(&extra_wide, ne, scratch2, Operand(zero_reg));
// Load the next bytecode and update table to the wide scaled table.
__ Addu(bytecode_offset, bytecode_offset, Operand(1));

8
src/builtins/mips64/builtins-mips64.cc
View File

@ -833,8 +833,12 @@ static void AdvanceBytecodeOffsetOrReturn(MacroAssembler* masm,
Label process_bytecode, extra_wide;
STATIC_ASSERT(0 == static_cast<int>(interpreter::Bytecode::kWide));
STATIC_ASSERT(1 == static_cast<int>(interpreter::Bytecode::kExtraWide));
__ Branch(&process_bytecode, hi, bytecode, Operand(1));
__ Branch(&extra_wide, eq, bytecode, Operand(1));
STATIC_ASSERT(2 == static_cast<int>(interpreter::Bytecode::kDebugBreakWide));
STATIC_ASSERT(3 ==
static_cast<int>(interpreter::Bytecode::kDebugBreakExtraWide));
__ Branch(&process_bytecode, hi, bytecode, Operand(3));
__ And(scratch2, bytecode, Operand(1));
__ Branch(&extra_wide, ne, scratch2, Operand(zero_reg));
// Load the next bytecode and update table to the wide scaled table.
__ Daddu(bytecode_offset, bytecode_offset, Operand(1));

8
src/builtins/x64/builtins-x64.cc
View File

@ -859,9 +859,13 @@ static void AdvanceBytecodeOffsetOrReturn(MacroAssembler* masm,
Label process_bytecode, extra_wide;
STATIC_ASSERT(0 == static_cast<int>(interpreter::Bytecode::kWide));
STATIC_ASSERT(1 == static_cast<int>(interpreter::Bytecode::kExtraWide));
__ cmpb(bytecode, Immediate(0x1));
STATIC_ASSERT(2 == static_cast<int>(interpreter::Bytecode::kDebugBreakWide));
STATIC_ASSERT(3 ==
static_cast<int>(interpreter::Bytecode::kDebugBreakExtraWide));
__ cmpb(bytecode, Immediate(0x3));
__ j(above, &process_bytecode, Label::kNear);
__ j(equal, &extra_wide, Label::kNear);
__ testb(bytecode, Immediate(0x1));
__ j(not_equal, &extra_wide, Label::kNear);
// Load the next bytecode and update table to the wide scaled table.
__ incl(bytecode_offset);

34
src/interpreter/bytecodes.h
View File

@ -28,6 +28,23 @@ namespace interpreter {
V(Wide, AccumulatorUse::kNone) \
V(ExtraWide, AccumulatorUse::kNone) \
\
/* Debug Breakpoints - one for each possible size of unscaled bytecodes */ \
/* and one for each operand widening prefix bytecode */ \
V(DebugBreakWide, AccumulatorUse::kReadWrite) \
V(DebugBreakExtraWide, AccumulatorUse::kReadWrite) \
V(DebugBreak0, AccumulatorUse::kReadWrite) \
V(DebugBreak1, AccumulatorUse::kReadWrite, OperandType::kReg) \
V(DebugBreak2, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kReg) \
V(DebugBreak3, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kReg, OperandType::kReg) \
V(DebugBreak4, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kReg, OperandType::kReg, OperandType::kReg) \
V(DebugBreak5, AccumulatorUse::kReadWrite, OperandType::kRuntimeId, \
OperandType::kReg, OperandType::kReg) \
V(DebugBreak6, AccumulatorUse::kReadWrite, OperandType::kRuntimeId, \
OperandType::kReg, OperandType::kReg, OperandType::kReg) \
\
/* Loading the accumulator */ \
V(LdaZero, AccumulatorUse::kWrite) \
V(LdaSmi, AccumulatorUse::kWrite, OperandType::kImm) \
@ -328,23 +345,6 @@ namespace interpreter {
/* Debugger */ \
V(Debugger, AccumulatorUse::kNone) \
\
/* Debug Breakpoints - one for each possible size of unscaled bytecodes */ \
/* and one for each operand widening prefix bytecode */ \
V(DebugBreak0, AccumulatorUse::kReadWrite) \
V(DebugBreak1, AccumulatorUse::kReadWrite, OperandType::kReg) \
V(DebugBreak2, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kReg) \
V(DebugBreak3, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kReg, OperandType::kReg) \
V(DebugBreak4, AccumulatorUse::kReadWrite, OperandType::kReg, \
OperandType::kReg, OperandType::kReg, OperandType::kReg) \
V(DebugBreak5, AccumulatorUse::kReadWrite, OperandType::kRuntimeId, \
OperandType::kReg, OperandType::kReg) \
V(DebugBreak6, AccumulatorUse::kReadWrite, OperandType::kRuntimeId, \
OperandType::kReg, OperandType::kReg, OperandType::kReg) \
V(DebugBreakWide, AccumulatorUse::kReadWrite) \
V(DebugBreakExtraWide, AccumulatorUse::kReadWrite) \
\
/* Block Coverage */ \
V(IncBlockCounter, AccumulatorUse::kNone, OperandType::kIdx) \
\

289
test/debugger/regress/regress-crbug-835973.js Normal file
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@ -0,0 +1,289 @@
// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Test that stepping works correctly with bytecode scaling prefix.
class MyClass { f(p) { this.x += p; } };
let obj = new MyClass();
function foo() {
obj.f(0);
obj.f(1);
obj.f(2);
obj.f(3);
obj.f(4);
obj.f(5);
obj.f(6);
obj.f(7);
obj.f(8);
obj.f(9);
obj.f(10);
obj.f(11);
obj.f(12);
obj.f(13);
obj.f(14);
obj.f(15);
obj.f(16);
obj.f(17);
obj.f(18);
obj.f(19);
obj.f(20);
obj.f(21);
obj.f(22);
obj.f(23);
obj.f(24);
obj.f(25);
obj.f(26);
obj.f(27);
obj.f(28);
obj.f(29);
obj.f(30);
obj.f(31);
obj.f(32);
obj.f(33);
obj.f(34);
obj.f(35);
obj.f(36);
obj.f(37);
obj.f(38);
obj.f(39);
obj.f(40);
obj.f(41);
obj.f(42);
obj.f(43);
obj.f(44);
obj.f(45);
obj.f(46);
obj.f(47);
obj.f(48);
obj.f(49);
obj.f(50);
obj.f(51);
obj.f(52);
obj.f(53);
obj.f(54);
obj.f(55);
obj.f(56);
obj.f(57);
obj.f(58);
obj.f(59);
obj.f(60);
obj.f(61);
obj.f(62);
obj.f(63);
obj.f(64);
obj.f(65);
obj.f(66);
obj.f(67);
obj.f(68);
obj.f(69);
obj.f(70);
obj.f(71);
obj.f(72);
obj.f(73);
obj.f(74);
obj.f(75);
obj.f(76);
obj.f(77);
obj.f(78);
obj.f(79);
obj.f(80);
obj.f(81);
obj.f(82);
obj.f(83);
obj.f(84);
obj.f(85);
obj.f(86);
obj.f(87);
obj.f(88);
obj.f(89);
obj.f(90);
obj.f(91);
obj.f(92);
obj.f(93);
obj.f(94);
obj.f(95);
obj.f(96);
obj.f(97);
obj.f(98);
obj.f(99);
obj.f(100);
obj.f(101);
obj.f(102);
obj.f(103);
obj.f(104);
obj.f(105);
obj.f(106);
obj.f(107);
obj.f(108);
obj.f(109);
obj.f(110);
obj.f(111);
obj.f(112);
obj.f(113);
obj.f(114);
obj.f(115);
obj.f(116);
obj.f(117);
obj.f(118);
obj.f(119);
obj.f(120);
obj.f(121);
obj.f(122);
obj.f(123);
obj.f(124);
obj.f(125);
obj.f(126);
obj.f(127);
obj.f(128);
obj.f(129);
obj.f(130);
obj.f(131);
obj.f(132);
obj.f(133);
obj.f(134);
obj.f(135);
obj.f(136);
obj.f(137);
obj.f(138);
obj.f(139);
obj.f(140);
obj.f(141);
obj.f(142);
obj.f(143);
obj.f(144);
obj.f(145);
obj.f(146);
obj.f(147);
obj.f(148);
obj.f(149);
obj.f(150);
obj.f(151);
obj.f(152);
obj.f(153);
obj.f(154);
obj.f(155);
obj.f(156);
obj.f(157);
obj.f(158);
obj.f(159);
obj.f(160);
obj.f(161);
obj.f(162);
obj.f(163);
obj.f(164);
obj.f(165);
obj.f(166);
obj.f(167);
obj.f(168);
obj.f(169);
obj.f(170);
obj.f(171);
obj.f(172);
obj.f(173);
obj.f(174);
obj.f(175);
obj.f(176);
obj.f(177);
obj.f(178);
obj.f(179);
obj.f(180);
obj.f(181);
obj.f(182);
obj.f(183);
obj.f(184);
obj.f(185);
obj.f(186);
obj.f(187);
obj.f(188);
obj.f(189);
obj.f(190);
obj.f(191);
obj.f(192);
obj.f(193);
obj.f(194);
obj.f(195);
obj.f(196);
obj.f(197);
obj.f(198);
obj.f(199);
obj.f(200);
obj.f(201);
obj.f(202);
obj.f(203);
obj.f(204);
obj.f(205);
obj.f(206);
obj.f(207);
obj.f(208);
obj.f(209);
obj.f(210);
obj.f(211);
obj.f(212);
obj.f(213);
obj.f(214);
obj.f(215);
obj.f(216);
obj.f(217);
obj.f(218);
obj.f(219);
obj.f(220);
obj.f(221);
obj.f(222);
obj.f(223);
obj.f(224);
obj.f(225);
obj.f(226);
obj.f(227);
obj.f(228);
obj.f(229);
obj.f(230);
obj.f(231);
obj.f(232);
obj.f(233);
obj.f(234);
obj.f(235);
obj.f(236);
obj.f(237);
obj.f(238);
obj.f(239);
obj.f(240);
obj.f(241);
obj.f(242);
obj.f(243);
obj.f(244);
obj.f(245);
obj.f(246);
obj.f(247);
obj.f(248);
obj.f(249);
obj.f(250);
obj.f(251);
obj.f(252);
obj.f(253);
obj.f(254);
obj.f(255);
debugger;
obj.f(256);
obj.f(257);
obj.f(258);
obj.f(259);
}
let break_count = 0;
function listener(event, exec_state, event_data, data) {
if (event != debug.Debug.DebugEvent.Break) return;
try {
exec_state.prepareStep(debug.Debug.StepAction.StepNext);
break_count++;
} catch {
%AbortJS("unexpected exception");
}
}
debug.Debug.setListener(listener);
foo();
debug.Debug.setListener(null);
assertEquals(7, break_count);