39d028c066
This reverts commit 2869d9de0d.
Reason for revert: Failing on V8 Arm - debug
Original change's description:
> [turbofan,arm64] Add float loads poisoning.
>
> Also extend load poisoning testing for arm and arm64.
>
> This is a port of I1ef202296744a39054366f2bc424d6952c3bbe9d,
> originally introduced for arm.
>
> Change-Id: I7d317bba6be633dd1e563daa7231d3c5e930f8e4
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1691032
> Commit-Queue: Martyn Capewell <martyn.capewell@arm.com>
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63519}
TBR=rmcilroy@chromium.org,mvstanton@chromium.org,neis@chromium.org,tebbi@chromium.org,martyn.capewell@arm.com,artem.serov@arm.com
Change-Id: I60ae552f98ae843d4fecbe163d60580a9f1a7068
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1782163
Reviewed-by: Martyn Capewell <martyn.capewell@arm.com>
Commit-Queue: Martyn Capewell <martyn.capewell@arm.com>
Cr-Commit-Position: refs/heads/master@{#63523}
114 lines
4.6 KiB
C++
114 lines
4.6 KiB
C++
// 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.
|
|
|
|
// The C++ style guide recommends using <re2> instead of <regex>. However, the
|
|
// former isn't available in V8.
|
|
#include <regex> // NOLINT(build/c++11)
|
|
#include <vector>
|
|
|
|
#include "src/codegen/arm/register-arm.h"
|
|
#include "test/cctest/cctest.h"
|
|
#include "test/cctest/disasm-regex-helper.h"
|
|
|
|
namespace v8 {
|
|
namespace internal {
|
|
|
|
namespace {
|
|
// Poison register.
|
|
const int kPRegCode = kSpeculationPoisonRegister.code();
|
|
const std::string kPReg = // NOLINT(runtime/string)
|
|
"r" + std::to_string(kPRegCode);
|
|
} // namespace
|
|
|
|
TEST(DisasmPoisonMonomorphicLoad) {
|
|
#ifdef ENABLE_DISASSEMBLER
|
|
if (i::FLAG_always_opt || !i::FLAG_opt) return;
|
|
|
|
i::FLAG_allow_natives_syntax = true;
|
|
i::FLAG_untrusted_code_mitigations = true;
|
|
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
CompileRun(
|
|
"function mono(o) { return o.x; };"
|
|
"%PrepareFunctionForOptimization(mono);"
|
|
"mono({ x : 1 });"
|
|
"mono({ x : 1 });"
|
|
"%OptimizeFunctionOnNextCall(mono);"
|
|
"mono({ x : 1 });");
|
|
|
|
// Matches that the property access sequence is instrumented with
|
|
// poisoning.
|
|
std::vector<std::string> patterns_array = {
|
|
"ldr <<Map:r[0-9]+>>, \\[<<Obj:r[0-9]+>>, #-1\\]", // load map
|
|
"ldr <<ExpMap:r[0-9]+>>, \\[pc, #", // load expected map
|
|
"cmp <<Map>>, <<ExpMap>>", // compare maps
|
|
"bne", // deopt if different
|
|
"eorne " + kPReg + ", " + kPReg + ", " + kPReg, // update the poison
|
|
"csdb", // spec. barrier
|
|
"ldr <<Field:r[0-9]+>>, \\[<<Obj>>, #\\+[0-9]+\\]", // load the field
|
|
"and <<Field>>, <<Field>>, " + kPReg, // apply the poison
|
|
};
|
|
CHECK(CheckDisassemblyRegexPatterns("mono", patterns_array));
|
|
#endif // ENABLE_DISASSEMBLER
|
|
}
|
|
|
|
TEST(DisasmPoisonPolymorphicLoad) {
|
|
#ifdef ENABLE_DISASSEMBLER
|
|
if (i::FLAG_always_opt || !i::FLAG_opt) return;
|
|
|
|
i::FLAG_allow_natives_syntax = true;
|
|
i::FLAG_untrusted_code_mitigations = true;
|
|
|
|
CcTest::InitializeVM();
|
|
v8::HandleScope scope(CcTest::isolate());
|
|
|
|
CompileRun(
|
|
"function poly(o) { return o.x + 1; };"
|
|
"let o1 = { x : 1 };"
|
|
"let o2 = { y : 1 };"
|
|
"o2.x = 2;"
|
|
"%PrepareFunctionForOptimization(poly);"
|
|
"poly(o2);"
|
|
"poly(o1);"
|
|
"poly(o2);"
|
|
"%OptimizeFunctionOnNextCall(poly);"
|
|
"poly(o1);");
|
|
|
|
// Matches that the property access sequence is instrumented with
|
|
// poisoning.
|
|
std::vector<std::string> patterns_array = {
|
|
"ldr <<Map0:r[0-9]+>>, \\[<<Obj:r[0-9]+>>, #-1\\]", // load map
|
|
"ldr <<ExpMap0:r[0-9]+>>, \\[pc", // load map const #1
|
|
"cmp <<Map0>>, <<ExpMap0>>", // compare maps
|
|
"beq", // ? go to the load
|
|
"eoreq " + kPReg + ", " + kPReg + ", " + kPReg, // update the poison
|
|
"csdb", // spec. barrier
|
|
"ldr <<Map1:r[0-9]+>>, \\[<<Obj>>, #-1\\]", // load map
|
|
"ldr <<ExpMap1:r[0-9]+>>, \\[pc", // load map const #2
|
|
"cmp <<Map1>>, <<ExpMap1>>", // compare maps
|
|
"bne", // deopt if different
|
|
"eorne " + kPReg + ", " + kPReg + ", " + kPReg, // update the poison
|
|
"csdb", // spec. barrier
|
|
"ldr <<Field:r[0-9]+>>, \\[<<Obj>>, #\\+[0-9]+\\]", // load the field
|
|
"and <<Field>>, <<Field>>, " + kPReg, // apply the poison
|
|
"mov r[0-9]+, <<Field>>, asr #1", // untag
|
|
"b", // goto merge point
|
|
// Lcase1:
|
|
"eorne " + kPReg + ", " + kPReg + ", " + kPReg, // update the poison
|
|
"csdb", // spec. barrier
|
|
"ldr <<BSt:r[0-9]+>>, \\[<<Obj>>, #\\+[0-9]+\\]", // load backing store
|
|
"and <<BSt>>, <<BSt>>, " + kPReg, // apply the poison
|
|
"ldr <<Prop:r[0-9]+>>, \\[<<Obj>>, #\\+[0-9]+\\]", // load the property
|
|
"and <<Prop>>, <<Prop>>, " + kPReg, // apply the poison
|
|
// Ldone:
|
|
};
|
|
CHECK(CheckDisassemblyRegexPatterns("poly", patterns_array));
|
|
#endif // ENABLE_DISASSEMBLER
|
|
}
|
|
|
|
} // namespace internal
|
|
} // namespace v8
|