[jdk16u] RFR: 8261310: PPC64 Zero build fails with 'VMError::controlled_crash(int)::FunctionDescriptor functionDescriptor' has incomplete type and cannot be defined

[Ioi Lam]

On Mon, 8 Feb 2021 18:30:16 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Note this is **not** a backport, but 16u-specific change.
> 
> $ CONF=linux-ppc64-zero-fastdebug make hotspot
> 
> 
>  1799 | struct FunctionDescriptor functionDescriptor;
>       | ^~~~~~~~~~~~~~~~~~
> 
> `FunctionDescriptor` is from `src/hotspot/cpu/ppc/assembler_ppc.hpp`, and obviously not available for Zero.
> 
> The affected code was removed by JDK-8252148 in 17, so this issue affects versions below it.
> While not exactly the regression for 16, it would be nice to have this fixed for 16 and lower, to get clean builds on all platform configurations, including JDK 16 GA.
> 
> The fix is trivial:
> 
> diff --git a/src/hotspot/share/utilities/vmError.cpp b/src/hotspot/share/utilities/vmError.cpp
> index 9b0dc413bcd..476fdc48e43 100644
> --- a/src/hotspot/share/utilities/vmError.cpp
> +++ b/src/hotspot/share/utilities/vmError.cpp
> @@ -1795,7 +1795,7 @@ void VMError::controlled_crash(int how) {
>    char * const dataPtr = NULL; // bad data pointer
>    const void (*funcPtr)(void); // bad function pointer
>  
> -#if defined(PPC64) && !defined(ABI_ELFv2)
> +#if defined(PPC64) && !defined(ABI_ELFv2) && !defined(ZERO)
>    struct FunctionDescriptor functionDescriptor;
>  
>    functionDescriptor.set_entry((address) 0xF);
> 
> Additional testing:
>  - [x] Linux Zero PPC64 fastdebug build

Marked as reviewed by iklam (Reviewer).

-------------

PR: https://git.openjdk.java.net/jdk16u/pull/23