基本上我正在寻找相当于gdb的“up”和“down”命令的perl.如果我打破子程序栏,我有一个看起来像这样的调用堆栈：
foo
\
baz
\
bar
我希望能够(无需从bar或baz返回)向上导航foo框架并通过操纵变量来查看它正在做什么,因为我通常会使用p或x的参数.
解决方法
使用
y command.
$cat frames.pl
sub bar {
my $fnord = 42;
1
}
sub baz { bar }
sub foo {
my $fnord = 23;
baz
};
foo;
$perl -d frames.pl
Loading DB routines from perl5db.pl version 1.37
Editor support available.
Enter h or 'h h' for help,or 'man perldebug' for more help.
main::(frames.pl:10): foo;
DB<1> c 3
main::bar(frames.pl:3): 1
DB<2> y 2 fnord
$fnord = 23
DB<3> T
. = main::bar() called from file 'frames.pl' line 5
. = main::baz() called from file 'frames.pl' line 8
. = main::foo() called from file 'frames.pl' line 10