Import SQLite 3.8.7.4.

third_party/sqlite/src/tool/stack_usage.tcl

 #!/usr/bin/tclsh
 #
 # Parse the output of 
 #
 #         objdump -d sqlite3.o
 #
 # for x64 and generate a report showing:
 #
 #    (1)  Stack used by each function
 #    (2)  Recursion paths and their aggregate stack depth
@@ skipping 78 matching lines @@
   }
 }
 foreach path [lsort -integer -decr -index 0 $pathlist] {
   foreach {depth m} $path break
   set first [lindex $m 0]
   puts [format {%6d %s %d} $depth $first $stkdepth($first)]
   foreach b [lrange $m 1 end] {
     puts "          $b $stkdepth($b)"
   }
 }