Integrated: 8367609: serviceability/sa/ClhsdbPmap.java fails when built with Clang

[Francesco Andreuzzi]

On Sun, 14 Sep 2025 23:16:00 GMT, Francesco Andreuzzi <fandreuzzi at openjdk.org> wrote:

> The problem seems to be in read_lib_segments (ps_core.c), this check is too harsh:
> 
> https://github.com/openjdk/jdk/blob/5271448b3a013b2e3edcd619a4a3b975b292dae1/src/jdk.hotspot.agent/linux/native/libsaproc/ps_core.c#L423-L425
> 
> In my run, `existing_map->memsz = 0xe24000`, while the rhs in L425 is `0xe23000`. According to the NT_FILE entry, this segment of `libjvm.so` has file offset 0x67f000. It seems that the linker aligned it down according to the page size (0x1000). The offset of the same segment according to `readelf -l libjvm.so` is 0x67fc80. This additional offset should be added to `p_memsz` to obtain the 0xe24000, which we see in the core dump.
> 
> I added some files to the ticket for context.
> 
> Passes `tier1` and `tier2`.

This pull request has now been integrated.

Changeset: 8be16160
Author:    Francesco Andreuzzi <fandreuzzi at openjdk.org>
Committer: Kevin Walls <kevinw at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/8be16160d2a6275ff619ea4cebb725475c646052
Stats:     7 lines in 1 file changed: 6 ins; 0 del; 1 mod

8367609: serviceability/sa/ClhsdbPmap.java fails when built with Clang

Reviewed-by: kevinw, cjplummer

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PR: https://git.openjdk.org/jdk/pull/27274