User`s guide

Writing Conditional Commands at the Machine Level

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).

See also “Linking With DSOs” on page 90 for a description on using the

tracei in and tracei at commands with DSOs.

Writing Conditional Commands at the Machine Level

Use the wheni command to write conditional commands for use in

debugging machine code. The wheni command works in the same way as the

when command described in “Writing Conditional Commands” on page 68.

The command list is a list of dbx commands, separated by semicolons. When