(gdb) run --eval "%{getncpus:proc}"
Starting program: /usr/bin/rpm --eval "%{getncpus:proc}"

-snip-

getmem_total () at /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpmio/macro.c:1186
1186	in /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpmio/macro.c
(gdb) info locals
mem = 0
pagesize = 4096
pages = 98574228
mem = <optimized out>
pagesize = <optimized out>
pages = <optimized out>
(gdb) next
1188	in /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpmio/macro.c
(gdb) 
1189	in /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpmio/macro.c
(gdb) info locals
mem = 33112064
pagesize = 4096
pages = 98574228
mem = <optimized out>
pagesize = <optimized out>
pages = <optimized out>
(gdb) fin
Run till exit from #0  getmem_total () at /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpmio/macro.c:1189
doGetncpus (mb=0x565b7c70, me=0x565b10c0, argv=0x565a78e0, parsed=0x0) at /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpmio/macro.c:1242
1242	in /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpmio/macro.c
(gdb) info locals
sizemacro = 0xf7f1f40f "%{?_smp_tasksize_proc}"
arg = <optimized out>
buf = "\377\377\377\377\377\377\377\377", '\000' <repeats 23 times>
ncpus = 64
mem = <optimized out>
(gdb) n
1244	in /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpmio/macro.c
(gdb) n
1246	in /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpmio/macro.c
(gdb) 
1255	in /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpmio/macro.c
(gdb) info locals
mcpus = 0
tasksize = 512
sizemacro = <optimized out>
arg = <optimized out>
buf = "\377\377\377\377\377\377\377\377", '\000' <repeats 23 times>
ncpus = 64
mem = <optimized out>
(gdb) bt
#0  doGetncpus (mb=0x565b7c70, me=0x565b10c0, argv=0x565a78e0, parsed=0x0) at /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpmio/macro.c:1255
#1  0xf7f127d2 in doMacro (mb=mb@entry=0x565b7c70, me=me@entry=0x565b10c0, args=0x565a78e0, parsed=0x0) at /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpmio/macro.c:1459
#2  0xf7f0f340 in expandMacro (mb=mb@entry=0x565b7c70, src=src@entry=0x56582440 "%{getncpus:proc}", slen=<optimized out>, slen@entry=0)
    at /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpmio/macro.c:1661
#3  0xf7f0fa34 in doExpandMacros (mc=mc@entry=0xf7f2f1a0 <rpmGlobalMacroContext_s>, src=src@entry=0x56582440 "%{getncpus:proc}", flags=flags@entry=0, target=0xffffd2f8)
    at /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpmio/macro.c:1731
#4  0xf7f0fae8 in rpmExpandMacros (mc=0xf7f2f1a0 <rpmGlobalMacroContext_s>, sbuf=0x56582440 "%{getncpus:proc}", obuf=0xffffd338, flags=0)
    at /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpmio/macro.c:1902
#5  0xf7f61859 in rpmcliAllArgCallback (opt=<optimized out>, con=<optimized out>, reason=<optimized out>, data=<optimized out>, arg=0x56582440 "%{getncpus:proc}")
    at /usr/src/debug/rpm-4.19.0-2.eln132.i386/lib/poptALL.c:133
#6  rpmcliAllArgCallback (con=0x56560250, reason=POPT_CALLBACK_REASON_OPTION, opt=0xf7fbe84c <rpmcliAllPoptTable+140>, arg=0x56582440 "%{getncpus:proc}", data=0x56558834)
    at /usr/src/debug/rpm-4.19.0-2.eln132.i386/lib/poptALL.c:100
#7  0xf7eef2f3 in invokeCallbacksOPTION () from /lib/libpopt.so.0
#8  0xf7eef368 in invokeCallbacksOPTION () from /lib/libpopt.so.0
#9  0xf7ef3c34 in poptGetNextOpt () from /lib/libpopt.so.0
#10 0xf7f60020 in rpmcliInit (argc=3, argv=0xffffd5c4, optionsTable=0x5655a020 <optionsTable>) at /usr/src/debug/rpm-4.19.0-2.eln132.i386/lib/poptALL.c:336
#11 0x56556545 in main (argc=3, argv=0xffffd5c4) at /usr/src/debug/rpm-4.19.0-2.eln132.i386/rpm.c:73
(gdb)