RFR: 8364150: RISC-V: Leftover for JDK-8343430 removing old trampoline call [v4]
Fei Yang
fyang at openjdk.org
Tue Jul 29 01:55:10 UTC 2025
> Hi, please consider this small change.
>
> JDK-8343430 removed the old trampoline call on RISC-V. And the new solution (reloc call) loads a target address from stub section and do an indirect call. This means the stub is always there for a NativeCall. So there's no need to check existence of the stub when doing `CallRelocation::fix_relocation_after_move` [1].
>
> We can always return the stub address in `NativeCall::reloc_destination` and use that address in `NativeCall::reloc_set_destination`. This helps simplify the code and saves one `MacroAssembler::target_addr_for_insn` call
> and one `trampoline_stub_Relocation::get_trampoline_for` call in these two functions respectively.
>
> Testing on linux-riscv64:
> - [x] tier1-tier3 (release build)
> - [x] hs:tier1-hs:tier3 (fastdebug build)
>
> [1] https://github.com/openjdk/jdk/blob/master/src/hotspot/share/code/relocInfo.cpp#L404-L406
Fei Yang has updated the pull request incrementally with one additional commit since the last revision:
Assert
-------------
Changes:
- all: https://git.openjdk.org/jdk/pull/26495/files
- new: https://git.openjdk.org/jdk/pull/26495/files/01949774..8fa3d037
Webrevs:
- full: https://webrevs.openjdk.org/?repo=jdk&pr=26495&range=03
- incr: https://webrevs.openjdk.org/?repo=jdk&pr=26495&range=02-03
Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
Patch: https://git.openjdk.org/jdk/pull/26495.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/26495/head:pull/26495
PR: https://git.openjdk.org/jdk/pull/26495
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