/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#ifndef _JVM_DTRACE_H_
#define _JVM_DTRACE_H_
/*
* Interface to dynamically turn on probes in Hotspot JVM. Currently,
* this interface can be used to dynamically enable certain DTrace
* probe points that are costly to have "always on".
*/
#ifdef __cplusplus
extern "C" {
#endif
struct _jvm_t;
/* Attach to the given JVM process. Returns NULL on failure.
jvm_get_last_error() returns last error message. */
/* Returns the last error message from this library or NULL if none. */
const char* jvm_get_last_error();
/* few well-known probe type constants for 'probe_types' param below */
/* Enable the specified DTrace probes of given probe types on
* the specified JVM. Returns >= 0 on success, -1 on failure.
* On success, this returns number of probe_types enabled.
* On failure, jvm_get_last_error() returns the last error message.
*/
/* Note: There is no jvm_disable_dtprobes function. Probes are automatically
* disabled when there are no more clients requiring those probes.
*/
/* Detach the given JVM. Returns 0 on success, -1 on failure.
* jvm_get_last_error() returns the last error message.
*/
#ifdef __cplusplus
}
#endif
#endif /* _JVM_DTRACE_H_ */