[llvm-bugs] [Bug 46478] -fsanitize=thread and -fsanitize=kernel-address produce unwanted .eh_frame and .init_array.* sections

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=46478

Fangrui Song <i at maskray.me> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |i at maskray.me
         Resolution|---                         |FIXED

--- Comment #4 from Fangrui Song <i at maskray.me> ---
The .eh_frame issue was fixed by https://reviews.llvm.org/D100251 (target:
13.0.0).

For .init_array.0, -fsanitize={address,memory,thread,...} instrumentations
create a module constructor which is placed in .init_array.0 .
For memory/thread, the module constructor just calls an init function which is
really small.
For address, the module constructor needs to register global variables (even
under -fsanitize=kernel-address), which cannot be simply ignored.

It is likely that the kernel doesn't need .init_array.0 for memory/thread, but
introducing a new option seems overkill to me.
Ignoring it with the current /DISCARD/ : { ... *(.init_array.*) } works quite
well.

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