[jdk8u-dev] RFR: 8329826: GCC 12 reports some compiler error when building jdk8

[Kun Wang]

On Tue, 9 Apr 2024 09:30:05 GMT, Kun Wang <kwang at openjdk.org> wrote:

> Env:
> ldd (GNU libc) 2.38
> gcc (GCC) 12.3.1 
> 
> Test the PR patch;
> Build release/fastdebug/slowdebug version pass
> 
> Reported issue : https://bugs.openjdk.org/browse/JDK-8329826

> The `register` issue is already being handled by the work ongoing in #357
> 
> I have not seen other failures. Are they specific to certain architectures?
> 
> We should not be introducing changes uniquely to 8u unless it is really necessary, so we need to look at this code in later JDKs.

Thank you very much for your code review and also suggest.
I found this problem when using gcc12 under the aarch64 architecture. After referring to https://github.com/openjdk/jdk8u-dev/pull/357, I still encounter other problems. I may need to remove the changes in adlc.make, the others are still having build issues in gcc12.

In file included from /home//jdk8u-dev-master/hotspot/src/share/vm/runtime/orderAccess.inline.hpp:45,
                 from /home//jdk8u-dev-master/hotspot/src/os/linux/vm/os_linux.inline.hpp:29,
                 from /home//jdk8u-dev-master/hotspot/src/share/vm/utilities/histogram.hpp:32,
                 from /home//jdk8u-dev-master/hotspot/src/share/vm/runtime/mutex.hpp:30,
                 from /home//jdk8u-dev-master/hotspot/src/share/vm/classfile/classLoaderData.hpp:32,
                 from /home//jdk8u-dev-master/hotspot/src/share/vm/oops/typeArrayKlass.hpp:28,
                 from /home//jdk8u-dev-master/hotspot/src/share/vm/oops/typeArrayOop.hpp:29,
                 from /home//jdk8u-dev-master/hotspot/src/share/vm/oops/constantPool.hpp:32,
                 from /home//jdk8u-dev-master/hotspot/src/share/vm/oops/method.hpp:33,
                 from /home//jdk8u-dev-master/hotspot/src/share/vm/runtime/frame.hpp:28,
                 from /home//jdk8u-dev-master/hotspot/src/share/vm/code/codeBlob.hpp:30,
                 from /home//jdk8u-dev-master/hotspot/src/share/vm/code/codeCache.hpp:28,
                 from /home//jdk8u-dev-master/hotspot/src/cpu/aarch64/vm/assembler_aarch64.inline.hpp:32,
                 from /home//jdk8u-dev-master/hotspot/src/share/vm/asm/assembler.inline.hpp:46,
                 from /home//jdk8u-dev-master/hotspot/src/share/vm/precompiled/precompiled.hpp:30:
In static member function ‘static void* OrderAccess::load_ptr_acquire(const volatile void*)’,
    inlined from ‘nmethod* volatile Method::code() const’ at /home//jdk8u-dev-master/hotspot/src/share/vm/oops/method.hpp:454:127,
    inlined from ‘static bool CompileBroker::compilation_is_complete(methodHandle, int, int)’ at /home//jdk8u-dev-master/hotspot/src/share/vm/compiler/compileBroker.cpp:1463:37,
    inlined from ‘static bool CompileBroker::compilation_is_complete(methodHandle, int, int)’ at /home//jdk8u-dev-master/hotspot/src/share/vm/compiler/compileBroker.cpp:1448:6,
    inlined from ‘static nmethod* CompileBroker::compile_method(methodHandle, int, int, methodHandle, int, const char*, Thread*)’ at /home//jdk8u-dev-master/hotspot/src/share/vm/compiler/compileBroker.cpp:1357:34:
/home//jdk8u-dev-master/hotspot/src/os_cpu/linux_aarch64/vm/orderAccess_linux_aarch64.inline.hpp:78:28: error: ‘long unsigned int __atomic_load_8(const volatile void*, int)’ writing 8 bytes into a region of size 0 overflows the destination [-Werror=stringop-overflow=]
   78 | { void* data; __atomic_load((void* const volatile *)p, &data, __ATOMIC_ACQUIRE); return data; }
      |               ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Done with /home//jdk8u-dev-master/hotspot/src/share/vm/compiler/compilerOracle.cpp

`-Werror=stringop-overflow=`, 

I'll test it on x86 architecture, and I'll report back with the results.

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PR Comment: https://git.openjdk.org/jdk8u-dev/pull/479#issuecomment-2058078166