c8cef93f24
An upcoming change to scudo will cause us to start calling android_unsafe_frame_pointer_chase() from within the allocator. Since this function uses ScopedDisableMTE, this would otherwise make it unsafe to use the allocator from within ScopedDisableMTE. This seems like an unreasonable restriction, so make ScopedDisableMTE save the PSTATE.TCO state in the constructor and restore it in the destructor. Bug: 135772972 Change-Id: I47e18d5fb2929efd5a58676488180cd85731007b
48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <gtest/gtest.h>
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#include <android-base/macros.h>
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#include <bionic/mte.h>
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__attribute__((no_sanitize("hwaddress")))
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static void test_tag_mismatch() {
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std::unique_ptr<int[]> p = std::make_unique<int[]>(4);
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p[0] = 1;
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int* mistagged_p ATTRIBUTE_UNUSED =
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reinterpret_cast<int*>(reinterpret_cast<uintptr_t>(p.get()) + (1ULL << 56));
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{
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ScopedDisableMTE x;
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{ ScopedDisableMTE y; }
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#if defined(__aarch64__)
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volatile int load ATTRIBUTE_UNUSED = *mistagged_p;
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#endif
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}
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#if defined(__aarch64__)
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if (mte_supported()) {
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EXPECT_DEATH(
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{
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volatile int load ATTRIBUTE_UNUSED = *mistagged_p;
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},
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"");
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}
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#endif
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}
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TEST(mte_test, ScopedDisableMTE) {
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test_tag_mismatch();
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}
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