Mon, 09 Mar 2020 12:54:53 +0000
8240295: hs_err elapsed time in seconds is not accurate enough
Reviewed-by: dholmes, sspitsyn
1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_RUNTIME_DTRACEJSDT_HPP
26 #define SHARE_VM_RUNTIME_DTRACEJSDT_HPP
28 #include "code/nmethod.hpp"
29 #ifdef TARGET_ARCH_x86
30 # include "nativeInst_x86.hpp"
31 #endif
32 #ifdef TARGET_ARCH_sparc
33 # include "nativeInst_sparc.hpp"
34 #endif
35 #ifdef TARGET_ARCH_zero
36 # include "nativeInst_zero.hpp"
37 #endif
38 #ifdef TARGET_ARCH_arm
39 # include "nativeInst_arm.hpp"
40 #endif
41 #ifdef TARGET_ARCH_ppc
42 # include "nativeInst_ppc.hpp"
43 #endif
45 class RegisteredProbes;
46 typedef jlong OpaqueProbes;
48 class DTraceJSDT : AllStatic {
49 private:
51 static int pd_activate(void* moduleBaseAddress, jstring module,
52 jint providers_count, JVM_DTraceProvider* providers);
53 static void pd_dispose(int handle);
54 static jboolean pd_is_supported();
56 public:
58 static OpaqueProbes activate(
59 jint version, jstring module_name, jint providers_count,
60 JVM_DTraceProvider* providers, TRAPS);
61 static jboolean is_probe_enabled(jmethodID method);
62 static void dispose(OpaqueProbes handle);
63 static jboolean is_supported();
64 };
66 class RegisteredProbes : public CHeapObj<mtInternal> {
67 private:
68 nmethod** _nmethods; // all the probe methods
69 size_t _count; // number of probe methods
70 int _helper_handle; // DTrace-assigned identifier
72 public:
73 RegisteredProbes(size_t count) {
74 _count = count;
75 _nmethods = NEW_C_HEAP_ARRAY(nmethod*, count, mtInternal);
76 }
78 ~RegisteredProbes() {
79 for (size_t i = 0; i < _count; ++i) {
80 // Let the sweeper reclaim it
81 _nmethods[i]->make_not_entrant();
82 _nmethods[i]->method()->clear_code();
83 }
84 FREE_C_HEAP_ARRAY(nmethod*, _nmethods, mtInternal);
85 _nmethods = NULL;
86 _count = 0;
87 }
89 static RegisteredProbes* toRegisteredProbes(OpaqueProbes p) {
90 return (RegisteredProbes*)(intptr_t)p;
91 }
93 static OpaqueProbes toOpaqueProbes(RegisteredProbes* p) {
94 return (OpaqueProbes)(intptr_t)p;
95 }
97 void set_helper_handle(int handle) { _helper_handle = handle; }
98 int helper_handle() const { return _helper_handle; }
100 nmethod* nmethod_at(size_t i) {
101 assert(i >= 0 && i < _count, "bad nmethod index");
102 return _nmethods[i];
103 }
105 void nmethod_at_put(size_t i, nmethod* nm) {
106 assert(i >= 0 && i < _count, "bad nmethod index");
107 _nmethods[i] = nm;
108 }
109 };
111 #endif // SHARE_VM_RUNTIME_DTRACEJSDT_HPP