ttrace.2 (2010 09)

t
ttrace(2) ttrace(2)
process(es) will be resumed and detached as if the debugger had performed a
TT_PROC_DETACH
request.
The addr2 argument specifies the action to be taken by the loader when the target pro-
cess does an
exec(). If the value is
TT_GEN_SHLIB_BPT
, the loader will communi-
cate certain events to the debugger through an architected break instruction. The infor-
mation obtained through these events can be used by the debugger to identify all the load
modules in the program and their unwind information. If the debugger is not interested
in these events the value must be set to 0 (zero).
The lwpid argument must be set to zero and data must be
TT_VERSION (see
TT_PROC_SETTRC
above).
TT_PROC_ATTACH_NOSTOP
This request is same as TT_PROC_ATTACH
, except when this call returns, the target
process is not stopped (none of its threads are stopped).
TT_PROC_DETACH
This request detaches the traced process and allows it to continue executing. It behaves
identically to
TT_PROC_CONTINUE
except that the process is no longer being traced
after the call returns.
For this request, the lwpid , addr , data , and addr2 arguments must be set to zero.
TT_PROC_RDTEXT, TT_PROC_RDTEXT_NOATTACH
These requests allow reading from the target process text.
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_RDDATA, TT_PROC_RDDATA_NOATTACH
These requests allow reading from the data space.
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 .
2 Hewlett-Packard Company − 2 − HP-UX 11i Version 3: September 2010