RFR: 8376269: Mixed jstack cannot find function in vDSO [v3]

[Yasumasa Suenaga]

On Wed, 28 Jan 2026 20:21:59 GMT, Chris Plummer <cjplummer at openjdk.org> wrote:

>> Yasumasa Suenaga has updated the pull request incrementally with three additional commits since the last revision:
>> 
>>  - Add new function to handle vDSO
>>  - Remove unneeded change
>>  - Remove 32 bit support
>
> src/jdk.hotspot.agent/linux/native/libsaproc/ps_core.c line 702:
> 
>> 700:          if (strcmp("linux-vdso.so.1", lib_name) == 0 ||
>> 701:              strcmp("linux-vdso64.so.1", lib_name) == 0) {
>> 702:             struct utsname uts;
> 
> It might be more readable if all the new code below this point was in a new function, but I'll leave it up to you to decide if it is worth doing.

Separated them as new function in new commit.

> src/jdk.hotspot.agent/linux/native/libsaproc/ps_core.c line 709:
> 
>> 707:               = "vdso64.so";
>> 708: #else
>> 709:               = "vdso32.so";
> 
> Do we need 32 bit support? I though it was already dropped.

Removed it in new commit to support 64 bit only.

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PR Review Comment: https://git.openjdk.org/jdk/pull/29400#discussion_r2739339771
PR Review Comment: https://git.openjdk.org/jdk/pull/29400#discussion_r2739338255