The following will list the entire call stack at entry to a proc or method.
proc x {a} {
puts "Entered x, args $a"
set distanceToTop [info level]
for {set i 1} {$i < $distanceToTop} {incr i} {
set callerlevel [expr {$distanceToTop - $i}]
puts "CALLER $callerlevel: [info level $callerlevel]"
}
# ...
return
}KPV Here's another version which prints out argument values (even default one). (See also Pstack.)
proc stacktrace {} {
set stack "Stack trace:\n"
for {set i 1} {$i < [info level]} {incr i} {
set lvl [info level -$i]
set pname [lindex $lvl 0]
append stack [string repeat " " $i]$pname
foreach value [lrange $lvl 1 end] arg [info args $pname] {
if {$value eq ""} {
info default $pname $arg value
}
append stack " $arg='$value'"
}
append stack \n
}
return $stack
}
# Testing code
proc A { } {
B 3
}
proc B { x } {
C [incr x] 2
}
proc C { x y {z 5} } {
D [incr x] [incr y] $z
}
proc D { x y z} {
E [incr x] [incr y] [incr z]
}
proc E {x y z } {
stacktrace
}
ANapier notes that the above solutions will not work if you are using TclOO as info args my will result in an error.
DKF: Yes, there's other mechanisms for introspecting TclOO methods on the stack. The self method command when run in the right stack scope will be useful, as will info class definition and/or info object definition: self method says what is running, and info class definition is like info args and info body rolled into one. (Methods aren't quite procedures. They're just very similar.)