perl -MData::Dump -MDevel::Trace::Subs=trace_dump -e '$ENV{DTS_ENABLE}=1; dd {a => 1}; trace_dump'

{ a => 1 }

Code flow:

    1: Data::Dump::dd
    2: Data::Dump::dump
    3: Data::Dump::_dump
    4: Data::Dump::tied_str
    5: Data::Dump::_dump
    6: Data::Dump::format_list


Stack trace:

    in:      Data::Dump::dd
    sub:     -
    file:    -e
    line:    1
    package: main

    in:      Data::Dump::dump
    sub:     Data::Dump::dd
    file:    /usr/lib/perl5/site_perl/5.22.0/Data/Dump.pm
    line:    84
    package: Data::Dump

    in:      Data::Dump::_dump
    sub:     Data::Dump::dump
    file:    /usr/lib/perl5/site_perl/5.22.0/Data/Dump.pm
    line:    36
    package: Data::Dump

    in:      Data::Dump::tied_str
    sub:     Data::Dump::_dump
    file:    /usr/lib/perl5/site_perl/5.22.0/Data/Dump.pm
    line:    292
    package: Data::Dump

    in:      Data::Dump::_dump
    sub:     Data::Dump::_dump
    file:    /usr/lib/perl5/site_perl/5.22.0/Data/Dump.pm
    line:    331
    package: Data::Dump

    in:      Data::Dump::format_list
    sub:     Data::Dump::dump
    file:    /usr/lib/perl5/site_perl/5.22.0/Data/Dump.pm
    line:    65
    package: Data::Dump