[Bug 273956] KERN_PROC_VMMAP does not read all mapped files

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273956

--- Comment #14 from Paul Floyd <pjfloyd@wanadoo.fr> ---
There are 3 ways that Valgrind triggers reading debuginfo

1. from its own image as here
2. from the guest ld-elf.so.1 and exe which Valgrind loads
3. from anything that the guest loads once it is running under Valgrind.

There's a longer explanation in coregrind/m_debuginfo/debuginfo.c starting line
1028

The two main goals are to use the same code for all cases and to  avoid looking
for debuginfo in non executable files. I'm not sure if that second goal is
still valid, but that's a different story.

For case 1 (and 2) we can be absolutely certain that the file is an ELF
executable. Case 1, the code wouldn't be running otherwise!

I can probably bodge the code to make it look like a RW section was seen and
just use the filename from the RX section.

How have things changed between 13.2 and 14.0 to cause this?

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