RFR: 8282306: os::is_first_C_frame(frame*) crashes on invalid link access [v2]

[Johannes Bechberger]

On Wed, 23 Feb 2022 22:06:47 GMT, Johannes Bechberger <duke at openjdk.java.net> wrote:

>> src/hotspot/share/runtime/os.cpp line 1227:
>> 
>>> 1225:          !t->is_in_full_stack((address)fr->fp()) ||
>>> 1226:          !t->is_in_full_stack((address)fr->sender_sp()) ||
>>> 1227:          !t->is_in_full_stack((address)fr->link());
>> 
>> Isn't this check of `fr.link()` what you already did in `can_access_link`?
>
> You're correct.

But as I said, I'm going to remove these checks all to gether.

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PR: https://git.openjdk.java.net/jdk/pull/7591