| File: | jdk/test/hotspot/gtest/metaspace/test_allocationGuard.cpp |
| Warning: | line 58, column 15 Value stored to 'p2' during its initialization is never read |
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| 1 | /* |
| 2 | * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved. |
| 3 | * Copyright (c) 2020 SAP SE. All rights reserved. |
| 4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 5 | * |
| 6 | * This code is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 only, as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 13 | * version 2 for more details (a copy is included in the LICENSE file that |
| 14 | * accompanied this code). |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License version |
| 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 | * |
| 20 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 21 | * or visit www.oracle.com if you need additional information or have any |
| 22 | * questions. |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include "precompiled.hpp" |
| 27 | #include "memory/metaspace/metaspaceArena.hpp" |
| 28 | #include "memory/metaspace/metaspaceSettings.hpp" |
| 29 | #include "memory/metaspace/testHelpers.hpp" |
| 30 | #include "utilities/debug.hpp" |
| 31 | #include "utilities/ostream.hpp" |
| 32 | |
| 33 | //#define LOG_PLEASE |
| 34 | #include "metaspaceGtestCommon.hpp" |
| 35 | #include "metaspaceGtestContexts.hpp" |
| 36 | |
| 37 | #ifdef ASSERT1 |
| 38 | |
| 39 | using metaspace::MetaspaceArena; |
| 40 | using metaspace::MetaspaceTestArena; |
| 41 | using metaspace::Settings; |
| 42 | |
| 43 | // Test that overwriting memory triggers an assert if allocation guards are enabled. |
| 44 | // Note: We use TEST_VM_ASSERT_MSG. However, an assert is only triggered if allocation |
| 45 | // guards are enabled; if guards are disabled for the gtests, this test would fail. |
| 46 | // So for that case, we trigger a fake assert. |
| 47 | TEST_VM_ASSERT_MSG(metaspace, test_overwriter, ".*Metaspace corruption.*")static void test_metaspace_test_overwriter_(); static void child_metaspace_test_overwriter_ () { ::testing::FLAGS_gtest_throw_on_failure = true; test_metaspace_test_overwriter_ (); exit(0); } class metaspace_test_overwriter_vm_assert_Test : public ::testing::Test { public: metaspace_test_overwriter_vm_assert_Test () {} private: virtual void TestBody(); static ::testing::TestInfo * const test_info_ __attribute__ ((unused)); metaspace_test_overwriter_vm_assert_Test (metaspace_test_overwriter_vm_assert_Test const &) = delete ; void operator=(metaspace_test_overwriter_vm_assert_Test const &) = delete;};::testing::TestInfo* const metaspace_test_overwriter_vm_assert_Test ::test_info_ = ::testing::internal::MakeAndRegisterTestInfo( "metaspace", "test_overwriter_vm_assert", __null, __null, :: testing::internal::CodeLocation("/home/daniel/Projects/java/jdk/test/hotspot/gtest/metaspace/test_allocationGuard.cpp" , 47), (::testing::internal::GetTestTypeId()), ::testing::Test ::SetUpTestCase, ::testing::Test::TearDownTestCase, new ::testing ::internal::TestFactoryImpl< metaspace_test_overwriter_vm_assert_Test >);void metaspace_test_overwriter_vm_assert_Test::TestBody () { switch (0) case 0: default: if (::testing::internal::AlwaysTrue ()) { const ::testing::internal::RE& gtest_regex = ("assert failed: " ".*Metaspace corruption.*"); ::testing::internal::DeathTest* gtest_dt; if (!::testing::internal::DeathTest::Create("child_metaspace_test_overwriter_()" , >est_regex, "/home/daniel/Projects/java/jdk/test/hotspot/gtest/metaspace/test_allocationGuard.cpp" , 47, >est_dt)) { goto gtest_label_47; } if (gtest_dt != __null) { ::testing::internal::scoped_ptr< ::testing::internal ::DeathTest> gtest_dt_ptr(gtest_dt); switch (gtest_dt-> AssumeRole()) { case ::testing::internal::DeathTest::OVERSEE_TEST : if (!gtest_dt->Passed(::testing::ExitedWithCode(1)(gtest_dt ->Wait()))) { goto gtest_label_47; } break; case ::testing ::internal::DeathTest::EXECUTE_TEST: { ::testing::internal::DeathTest ::ReturnSentinel gtest_sentinel(gtest_dt); if (::testing::internal ::AlwaysTrue()) { child_metaspace_test_overwriter_(); }; gtest_dt ->Abort(::testing::internal::DeathTest::TEST_DID_NOT_DIE); break; } default: break; } } } else gtest_label_47: return :: testing::internal::AssertHelper(::testing::TestPartResult::kFatalFailure , "/home/daniel/Projects/java/jdk/test/hotspot/gtest/metaspace/test_allocationGuard.cpp" , 47, ::testing::internal::DeathTest::LastMessage()) = ::testing ::Message(); } void test_metaspace_test_overwriter_() { |
| 48 | |
| 49 | if (Settings::use_allocation_guard()) { |
| 50 | MetaspaceGtestContext context; |
| 51 | MetaspaceTestArena* arena = context.create_arena(Metaspace::StandardMetaspaceType); |
| 52 | // We allocate two blocks. We then write over the end of the first block, which |
| 53 | // should corrupt the fence between the two blocks. |
| 54 | // Note: there is of course no guarantee that blocks allocated sequentially are neighbors; |
| 55 | // but in this case (clean standard-sized test arena and very small allocations) it can |
| 56 | // be safely assumed). |
| 57 | MetaWord* p1 = arena->allocate(8); |
| 58 | MetaWord* p2 = arena->allocate(2); |
Value stored to 'p2' during its initialization is never read | |
| 59 | p1[8] = (MetaWord)0x9345; // Overwriter |
| 60 | // Now we delete the arena (as happens during class unloading); this will check all |
| 61 | // block canaries and should trigger an assert (see MetaspaceArena::verify_allocation_guards()). |
| 62 | delete arena; |
| 63 | } else { |
| 64 | assert(false, "Metaspace corruption - please ignore this, fake message to satisfy tests")do { if (!(false)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/test/hotspot/gtest/metaspace/test_allocationGuard.cpp" , 64, "assert(" "false" ") failed", "Metaspace corruption - please ignore this, fake message to satisfy tests" ); ::breakpoint(); } } while (0); |
| 65 | } |
| 66 | |
| 67 | } |
| 68 | |
| 69 | #endif // ASSERT |