| /* |
| * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * 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 |
| |
| #include <sys/types.h> |
| |
| |
| struct _jvm_t; |
| typedef struct _jvm_t jvm_t; |
| |
| |
| /* Attach to the given JVM process. Returns NULL on failure. |
| jvm_get_last_error() returns last error message. */ |
| jvm_t* jvm_attach(pid_t pid); |
| |
| /* 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 */ |
| |
| #define JVM_DTPROBE_METHOD_ENTRY "method-entry" |
| #define JVM_DTPROBE_METHOD_RETURN "method-return" |
| #define JVM_DTPROBE_MONITOR_ENTER "monitor-contended-enter" |
| #define JVM_DTPROBE_MONITOR_ENTERED "monitor-contended-entered" |
| #define JVM_DTPROBE_MONITOR_EXIT "monitor-contended-exit" |
| #define JVM_DTPROBE_MONITOR_WAIT "monitor-wait" |
| #define JVM_DTPROBE_MONITOR_WAITED "monitor-waited" |
| #define JVM_DTPROBE_MONITOR_NOTIFY "monitor-notify" |
| #define JVM_DTPROBE_MONITOR_NOTIFYALL "monitor-notifyall" |
| #define JVM_DTPROBE_OBJECT_ALLOC "object-alloc" |
| #define JVM_DTPROBE_ALL "*" |
| |
| /* 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. |
| */ |
| int jvm_enable_dtprobes(jvm_t* jvm, int num_probe_types, const char** probe_types); |
| |
| /* 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. |
| */ |
| int jvm_detach(jvm_t* jvm); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _JVM_DTRACE_H_ */ |