HP-UX Reference (11i v2 04/09) - 2 System Calls (vol 5)

t
ttrace(2) ttrace(2)
For this request, the lwpid, addr, data and addr2 arguments must be set to zero.
TT_PROC_RDTEXT
TT_PROC_RDDATA
TT_PROC_RDTEXT_NOATTACH
TT_PROC_RDDATA_NOATTACH
These requests allow reading from the target process text (
TT_PROC_RDTEXT
and
TT_PROC_RDTEXT_NOATTACH
) or data space (
TT_PROC_RDDATA
and
TT_PROC_RDDATA_NOATTACH
).
The addr argument specifies the offset to be read from. The data argument specifies the
number of bytes to read and the addr2 argument specifies where to store that data in the
tracing process.
The lwpid argument must be set to zero.
TT_PROC_WRTEXT
TT_PROC_WRDATA
These requests allow writing into the target process text (
TT_PROC_WRTEXT) and data
spaces (
TT_PROC_WRDATA
).
The addr argument specifies the offset to be written to. The data argument specifies the
number of bytes to write.a The addr2 argument specifies where to get the data in the
tracing process.
The lwpid argument must be set to zero.
TT_PROC_STOP
This request causes the traced process (all its threads) to stop. If a thread was already
stopped by the debugger prior to this call, its state is not modified.
The lwpid , addr, data and addr2 arguments must be set to zero.
TT_PROC_CONTINUE
This request causes the entire traced process to resume execution. All threads that had
been stopped directly (request) or indirectly (event) by the debugger are resumed with all
their pending signals intact.
The data , addr and addr2 arguments must be set to zero.
TT_PROC_GET_PATHNAME
This request is used by the calling process to access the path name of the executable file
provided as a path or file argument to exec(). The request reads data bytes of data of
the pathname string from the traced process’ context into the data buffer in user space
pointed to by addr .
In the typical case, data is equal to the value of the ttexec_data_t.tts_len member of the
ttstate_t structure returned via the TT_LWP_GET_STATE
or other ttrace
requests returning a Lightweight Process (LWP or lwp) state. The length of the path
does not include a terminating null character. The data is available during the entire life
of the process.
The lwpid and addr2 arguments must be set to zero.
TT_PROC_GET_EVENT_MASK
This request returns the process-wide event flags and signal mask values.
The data argument specifies the number of bytes to be read from the context of the traced
process into the
ttevent_t data structure in user space pointed to by addr.
The lwpid and addr2 arguments must be set to zero.
HP-UX 11i Version 2: September 2004 − 2 − Hewlett-Packard Company Section 2−−445