User`s guide

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Appendix A: dbx Commands
tracei [expression|variable] at address
Prints the value of the variable whenever your program
reaches the specified address. (For machine-level
debugging.)
If the expression is of type pointer, look at the data pointed
to and watch until it changes. If the expression is not of type
pointer, look at the 32 bits at that address (assume the
expression evaluates to an address).
tracei [expression|variable] in procedure
Whenever the variable changes within the procedure that
you specify, dbx prints the old and new values of that
variable. (For machine-level debugging.)
If the expression is of type pointer, look at the data pointed
to and watch until it changes. If the expression is not of type
pointer, look at the 32 bits at that address (assume the
expression evaluates to an address).
tracei [expression1|variable] at address if expression2
Prints the value of the variable whenever your program
reaches the specified address and the given expression is
true. (For machine-level debugging.)
If expression1 is of type pointer, look at the data pointed to
and watch until it changes. If expression1 is not of type
pointer, look at the 32 bits at that address (assume the
expression evaluates to an address).
tracei [expression1|variable] in procedure if expression2
Whenever the variable changes within the procedure that
you specify, dbx prints the old and new values of that
variable, if the given expression is true. (For machine-level
debugging.)
If expression1 is of type pointer, look at the data pointed to
and watch until it changes. If expression1 is not of type
pointer, look at the 32 bits at that address (assume the
expression evaluates to an address).
unalias alias Removes the specified alias.