After recording profiles with "perf record" it's possible later to view per-instruction counter stats with "perf annotate" (or interactively from "perf report"). However, when building with `--link-model=dynamic` the report only shows assembly and doesn't include source lines.

Full build command: `./buildscripts/scons.py --variables-files=etc/scons/mongodbtoolchain_stable_clang.vars --ninja generate-ninja ICECC=icecc CCACHE=ccache --dbg=off --opt=on --link-model=dynamic`

Running perf tool:
1. Start mongod
2. $ perf record -p $(pidof mongod) -e cpu-cycles
3. Execute a query against mongod
4. stop perf (Ctrl+C), it will create perf.data file in the working dir
5. $ perf annotate (by default it will use perf.data file)
The tool should show information similar to this:

       │             switch (conf->go[*(const uint8_t *)conf->cur]) {
  4.00 │ 80:   movzbl (%rbx),%r10d
  2.00 │       movsbl (%rax,%r10,1),%eax
 20.64 │       add    $0xffffffff,%eax

But when using dynamic linking it only shows disassembly and "s" command doesn't toggle the sources on/off (only recolors the line numbers).