libpctx(3LIB) Interface Libraries libpctx(3LIB)NAME
libpctx - process context library
SYNOPSIS
cc [ flag... ] file... -lpctx [ library... ]
DESCRIPTION
Functions in this library provide a simple means to access the underlying facilities of proc(4) to allow a controlling process to manipu-
late the state of a controlled process.
This library is primarily for use in conjunction with the libcpc(3LIB) library. Used together, these libraries allow developers to con-
struct tools that can manipulate CPU performance counters in other processes. The cputrack(1) utility is an example of such a tool.
INTERFACES
The shared object libpctx.so.1 provides the public interfaces defined below. See Intro(3) for additional information on shared object
interfaces.
pctx_capture pctx_create
pctx_release pctx_run
pctx_set_events
FILES
/usr/lib/libpctx.so.1 shared object
/usr/lib/64/libpctx.so.1 64-bit shared object
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
|ATTRIBUTE TYPE |ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcpcu (32-bit) |
+-----------------------------+-----------------------------+
| |SUNWcpcux (64-bit) |
+-----------------------------+-----------------------------+
|MT-Level |Safe |
+-----------------------------+-----------------------------+
SEE ALSO cputrack(1), Intro(3), cpc(3CPC), libcpc(3LIB), proc(4), attributes(5)SunOS 5.11 22 May 2003 libpctx(3LIB)
Check Out this Related Man Page
cpc_pctx_bind_event(3CPC)cpc_pctx_bind_event(3CPC)NAME
cpc_pctx_bind_event, cpc_pctx_take_sample, cpc_pctx_rele, cpc_pctx_invalidate - access CPU performance counters in other processes
SYNOPSIS
cc [ flag... ] file... -lcpc -lpctx [ library... ]
#include <libpctx.h>
#include <libcpc.h>
int cpc_pctx_bind_event(pctx_t *pctx, id_t lwpid, cpc_event_t *event, int flags);
int cpc_pctx_take_sample(pctx_t *pctx, id_t lwpid, cpc_event_t *event);
int cpc_pctx_rele(pctx_t *pctx, id_t lwpid);
int cpc_pctx_invalidate(pctx_t *pctx, id_t lwpid);
These functions are designed to be run in the context of an event handler created using the libpctx(3LIB) family of functions that allow
the caller, also known as the controlling process, to manipulate the performance counters in the context of a controlled process. The con-
trolled process is described by the pctx argument, which must be obtained from an invocation of pctx_capture(3CPC) or pctx_create(3CPC) and
passed to the functions described on this page in the context of an event handler.
The semantics of the functions cpc_pctx_bind_event(), cpc_pctx_take_sample(), and cpc_pctx_rele() are directly analogous to those of
cpc_bind_event(), cpc_take_sample(), and cpc_rele() described on the cpc_bind_event(3CPC) manual page.
The cpc_pctx_invalidate() function allows the performance context to be invalidated in an LWP in the controlled process.
These functions return 0 on success. On failure, they return -1 and set errno to indicate the error.
The cpc_pctx_bind_event(), cpc_pctx_take_sample(), and cpc_pctx_rele() functions return the same errno values the analogous functions
described on the cpc_bind_event(3CPC) manual page. In addition, these function may fail if:
ESRCH The value of the lwpid argument is invalid in the context of the controlled process.
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|MT-Level |Unsafe |
+-----------------------------+-----------------------------+
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
cpc(3CPC), cpc_bind_event(3CPC), libcpc(3LIB), pctx_capture(3CPC), pctx_create(3CPC), attributes(5)
The cpc_pctx_bind_event(), cpc_pctx_invalidate(), cpc_pctx_rele(), and cpc_pctx_take_sample() functions exist for binary compatibility
only. Source containing these functions will not compile. These functions are obsolete and might be removed in a future release. Applica-
tions should use cpc_bind_pctx(3CPC), cpc_unbind(3CPC), and cpc_set_sample(3CPC) instead.
The capability to create and analyze overflow events in other processes is not available, though it may be made available in a future ver-
sion of this API. In the current implementation, the flags field must be specified as 0.
28 Mar 2005 cpc_pctx_bind_event(3CPC)