Integrated: 8258751: Improve ExceptionHandlerTable dump

Hao Sun github.com+16932759+shqking at openjdk.java.net
Tue Jan 5 08:33:00 UTC 2021


On Wed, 23 Dec 2020 10:16:29 GMT, Hao Sun <github.com+16932759+shqking at openjdk.org> wrote:

> In addition to PC offset, print the real PC as well if available when
> dumping the ExceptionHandlerTable, as it's more convenient and readable
> for debugging or other activities.
> 
> Note that compilers might dump the ExceptionHandlerTable before method
> registered. See functions emit_code_body() and fill_buffer(). However,
> real PC is not ready yet during these phases since the generated code is
> not installed. In such scenarios, the real PC is not printed.
> 
> The example below shows how the dump information would be changed after
> applying this patch.
>   BEFORE:
>     ExceptionHandlerTable (size = 40 bytes)
>     catch_pco = 392 (2 entries)
>       bci 8 at scope depth 0 -> pco 184
>       bci 19 at scope depth 0 -> pco 124
>   AFTER:
>     ExceptionHandlerTable (size = 40 bytes)
>     catch_pco = 392 (pc=0x0000ffff818f13c8, 2 entries)
>       bci 8 at scope depth 0 -> pco 184 (pc=0x0000ffff818f12f8)
>       bci 19 at scope depth 0 -> pco 124 (pc=0x0000ffff818f12bc)

This pull request has now been integrated.

Changeset: 17d1645e
Author:    Hao Sun <hao.sun at arm.com>
Committer: Ningsheng Jian <njian at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/17d1645e
Stats:     21 lines in 3 files changed: 10 ins; 0 del; 11 mod

8258751: Improve ExceptionHandlerTable dump

Reviewed-by: thartmann, chagedorn, njian

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

PR: https://git.openjdk.java.net/jdk/pull/1877


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