Source Files
ctags		- generate an index of the objects found in a source file
cscope		- browse source code, search, find definitions, calls to a function, etc...

gcc -E		- Print the output of the preprocessor
ld --cref	- Print a cross-reference table (function x gets called by function y and z, ...)


Binaries
ldd - list dynamic dependencies of executable files or shared objects
nm/dump - print an object's internal and/or external symbol table

elf file format documentation



Runtime
debuggers:
	gdb
	ddd

profilers:
	prof
	gprof
	tprof (uses trace)

system call tracers: 
	truss (via procfs)		[Solaris,FreeBSD]
	ktrace				[BSD]
	strace,				[Linux]
	ktruss,				[NetBSD]
	trace				[AIX]

system/user call interceptors:
	LD_PRELOAD
	PLT, sys_call_table[]
	Linux Kernel Hooker

user function call tracers:
	Visible Workings page, brian marick, CMU
	truss -u a.out -u ld:: -u :: ...

gcore - get core images of running processes
proc tools (solaris) - get information on a process while it's running
	pflags	- ...
	pcred	- ...
	pmap	- print address space map of a process
	pldd	- print dynamic libraries linked in to a process
	psig	- list signal actions of a process
	pstack	- print the stack trace
	pfiles	- print open files
	pwdx	- print working directories
	pstop/prun	- stop/start a process
	pwait	- wait for the specified processes to terminate
	ptree	- print a process tree...  print the ppid, the pppid, ppppid, etc...
	ptime	- similar to time(1) command

fuser - show which processes have a specific file/directory/device open