RFR: 8332825: ubsan: guardedMemory.cpp:35:11: runtime error: null pointer passed as argument 2, which is declared to never be null

[Matthias Baesken]

When running :tier1 hs tests, the following issue has been reported with ubsan enabled (configure flag --enable-ubsan) the following issue is reported .
Reason is that gtest forces a call void* no_data_copy = GuardedMemory::wrap_copy(no_data, 0); with 0 length . This leads to a special case for memcpy .

gtest/GTestWrapper.jtr

/jdk/src/hotspot/share/memory/guardedMemory.cpp:35:11: runtime error: null pointer passed as argument 2, which is declared to never be null
    #0 0x7f174d684227 in GuardedMemory::wrap_copy(void const*, unsigned long, void const*) /jdk/src/hotspot/share/memory/guardedMemory.cpp:35
    #1 0x7f174dd210c3 in GuardedMemory_wrap_Test::TestBody() /jdk/test/hotspot/gtest/memory/test_guardedMemory.cpp:146
    #2 0x7f17526f8d63 in testing::Test::Run() /tools/gtest/googletest-1.14.0/googletest/src/gtest.cc:2687
    #3 0x7f17526f8d63 in testing::Test::Run() /tools/gtest/googletest-1.14.0/googletest/src/gtest.cc:2677
    #4 0x7f17526f946d in testing::TestInfo::Run() /tools/gtest/googletest-1.14.0/googletest/src/gtest.cc:2836
    #5 0x7f1752729ef8 in testing::TestSuite::Run() /tools/gtest/googletest-1.14.0/googletest/src/gtest.cc:3015
    #6 0x7f1752729ef8 in testing::TestSuite::Run() /tools/gtest/googletest-1.14.0/googletest/src/gtest.cc:2968
    #7 0x7f175272aec5 in testing::internal::UnitTestImpl::RunAllTests() /tools/gtest/googletest-1.14.0/googletest/src/gtest.cc:5920
    #8 0x7f17526f0fcf in bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) /tools/gtest/googletest-1.14.0/googletest/src/gtest.cc:2670
    #9 0x7f17526f0fcf in testing::UnitTest::Run() /tools/gtest/googletest-1.14.0/googletest/src/gtest.cc:5484
    #10 0x7f174d8c84d7 in RUN_ALL_TESTS() /tools/gtest/googletest-1.14.0/googletest/include/gtest/gtest.h:2317
    #11 0x7f174d8c84d7 in runUnitTestsInner /jdk/test/hotspot/gtest/gtestMain.cpp:290
    #12 0x558be83647d8 in main /jdk/test/hotspot/gtest/gtestLauncher.cpp:40
    #13 0x7f174734c24c in __libc_start_main (/lib64/libc.so.6+0x3524c) (BuildId: f732026552f6adff988b338e92d466bc81a01c37)

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Commit messages:
 - JDK-8332825

Changes: https://git.openjdk.org/jdk/pull/19382/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19382&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8332825
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/19382.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19382/head:pull/19382

PR: https://git.openjdk.org/jdk/pull/19382