HP-UX Reference (11i v1 05/09) - 1 User Commands N-Z (vol 2)

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nadb(1) nadb(1)

Keyword Commands

Run the Keyword Command Form using the traditional command form by preﬁxing the command with

Please refer to Keyword Form Commands for the complete list of keyword commands.

Process Commands

These commands deal with managing subprocesses.

nadb can run an object ﬁle as a subprocess Also, it

can adopt a subprocess given its pid.

nadb can debug multi-threaded and/or forked subprocesses. It can

also debug mutiple subprocesses at the same time. However, at any time it focuses on a one subprocess

and one of its threads called the current subprocess and current thread respectively.

The command consists of

: followed by the modiﬁer and an optional list of arguments. They are:

r [ objfile ]Runobjﬁle as a subprocess. If address is given explicitly, the program is entered at

this point; otherwise the program is entered at its standard entry point. The value

count speciﬁes how many breakpoints are ignored before stopping. arguments to the

subprocess may be supplied on the same line as the command. Semicolon is not used

as a command separator. An argument starting with < or > causes the standard input

or output to be established for the command. All signals are turned on when entering

the subprocess. Such a subprocess is referred to as a created subprocess.

If there are other created subprocesses running, all are killed. It does not kill any

attached subprocesses. This becomes the current subprocess.

e [ objfile ] Set up a subprocess as in

:r; no instructions are executed.

a [ objfile ]Causesnadb to adopt process with pid as a traced subprocess. If the objﬁle is

speciﬁed,

nadb uses it to lookup symbol information. Count has same meaning as in

:r. Such a subprocess is referred to as an attached subprocess. This subprocess

becomes the current subprocess.

k [ pid | * ] Kills a created subprocess. If no argument is speciﬁed it kills the current subprocess.

If a pid is given, it kills the subprocess with that pid.if* is given, it kills all created

subprocesses.

The current subprocess is chosen from the remaining subprocesses.

de [ pid | * ] The arguments can be a pid or a

. Same as :k, however it applies to attached sub-

processes.

nadb detaches from them.

c [ signal ] Continues the current subprocess with signal signal. It continues all the threads of

the subprocess. If no signal is speciﬁed, the signal that caused it to stop is sent. If

address is speciﬁed, the current thread continues at this address. Breakpoint skip-

ping is the same as for

:r.

s [ signal | arg1 arg2 ... ]

Step the current thread count times. If address is given, then the thread continues at

that address, else from the address where it had stopped. If no signal is speciﬁed, the

signal that caused it to stop is sent. If there is no current subprocess, object ﬁle is run

as a subprocess as for

:r. In this case no signal can be sent; the remainder of the line

is treated as arguments to the subprocess.

b [ command ] Sets breakpoint at address in the current subprocess The breakpoint is executed

count-1 times before causing a stop. Each time the breakpoint is encountered, the

command is executed. This breakpoint is a subprocess breakpoint. If any of the

thread executes the instruction at this address, it will stop. Multiple breakpoints can

be set at the same address.

d [ num | * ] Deletes all breakpoints at address in the current subprocess, if it is speciﬁed. If * is

speciﬁed, it deletes all the current subprocess breakpoints. If num is speciﬁed, break-

point with number num is deleted.

en [ num | * ] Enables all breakpoints at address in the current subprocess, if it is speciﬁed. If

* is

speciﬁed, it enables all the current subprocess breakpoints. If num is speciﬁed, break-

point with number num is enabled.

di [ num | * ] Disables all breakpoints at address in the current subprocess, if it is speciﬁed. If

* is

speciﬁed, it disables all the current subprocess breakpoints. If num is speciﬁed,

breakpoint with number num is disabled.

HP-UX 11i Version 1: September 2005 − 5 − Hewlett-Packard Company Section 1−−581