[Bug 273688] pstack does not work with Valgrind

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 10 Sep 2023 07:54:37 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273688

            Bug ID: 273688
           Summary: pstack does not work with Valgrind
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs@FreeBSD.org
          Reporter: pjfloyd@wanadoo.fr

I get

paulf@freebsd:~ $ pstack 33671
33671: /home/paulf/valgrind/drd/drd-amd64-freebsd
----------------- thread -1 (running) -----------------
  0x3815ed66 ???????? (3815dcde, 0, 238c470, 10, 380bc159, 0)

which isn't much help.

Info on the exe:

paulf@freebsd:~ $ file /home/paulf/valgrind/drd/drd-amd64-freebsd
/home/paulf/valgrind/drd/drd-amd64-freebsd: ELF 64-bit LSB executable, x86-64,
version 1 (FreeBSD), statically linked, for FreeBSD 15.0 (1500000),
FreeBSD-style, with debug_info, not stripped

Not just statically linked but does not link with libc. Has its own _start and
additionally uses a load address of 0x38000000.

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