On Wed, 22 Jul 2026 01:35:56 GMT, Yasumasa Suenaga <[email protected]> wrote:
> In PR #31669 for [JDK-8386593](https://bugs.openjdk.org/browse/JDK-8386593), > we discoverd `DW_CFA_offset_extended` and `DW_CFA_restore_extended` are not > supported in SA. > > GCC on Fedora 44 and Ubuntu 26.04 (at least) generates DWARF instructions in > below: > > > DW_CFA_offset_extended: r79 (v15) at cfa-16 > DW_CFA_advance_loc: 204 to 00000000006646e4 > DW_CFA_restore: r30 (x30) > DW_CFA_restore: r29 (x29) > DW_CFA_restore: r19 (x19) > DW_CFA_restore: r20 (x20) > DW_CFA_restore_extended: r79 (v15) > > > We need to add `DW_CFA_offset_extended` and `DW_CFA_restore_extended`, and > vector registers for AArch64 which are defined in [DWARF for the Arm® 64-bit > Architecture > (AArch64)](https://github.com/ARM-software/abi-aa/blob/2025Q4/aadwarf64/aadwarf64.rst#dwarf-register-names). > > --------- > - [x] I confirm that I make this contribution in accordance with the [OpenJDK > Interim AI Policy](https://openjdk.org/legal/ai). We can see V registers in DWARF instructions as following in the binary built by GCC on Ubuntu 26.04 and Fedora 44 at least. Thus I added them in this PR. Otherwise DWARF parser in SA does not work because they are unknown registers. DW_CFA_restore_extended: r79 (v15) ------------- PR Comment: https://git.openjdk.org/jdk/pull/31999#issuecomment-5110900068
