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src/share/vm/runtime/dtraceJSDT.cpp@710a3c8b516e (annotated)

src/share/vm/runtime/dtraceJSDT.cpp

Tue, 08 Aug 2017 15:57:29 +0800

author

aoqi

date

Tue, 08 Aug 2017 15:57:29 +0800

changeset 6876

710a3c8b516e

parent 4037

da91efe96a93

parent 0

f90c822e73f8

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#include "precompiled.hpp"
aoqi@0	26	#include "classfile/javaClasses.hpp"
aoqi@0	27	#include "code/codeBlob.hpp"
aoqi@0	28	#include "memory/allocation.hpp"
aoqi@0	29	#include "prims/jvm.h"
aoqi@0	30	#include "runtime/dtraceJSDT.hpp"
aoqi@0	31	#include "runtime/jniHandles.hpp"
aoqi@0	32	#include "runtime/os.hpp"
aoqi@0	33	#include "utilities/exceptions.hpp"
aoqi@0	34	#include "utilities/globalDefinitions.hpp"
aoqi@0	35	#include "utilities/utf8.hpp"
aoqi@0	36
aoqi@0	37	#ifdef HAVE_DTRACE_H
aoqi@0	38
aoqi@0	39	jlong DTraceJSDT::activate(
aoqi@0	40	jint version, jstring module_name, jint providers_count,
aoqi@0	41	JVM_DTraceProvider* providers, TRAPS) {
aoqi@0	42
aoqi@0	43	size_t count = 0;
aoqi@0	44	RegisteredProbes* probes = NULL;
aoqi@0	45
aoqi@0	46	if (!is_supported()) {
aoqi@0	47	return 0;
aoqi@0	48	}
aoqi@0	49
aoqi@0	50	assert(module_name != NULL, "valid module name");
aoqi@0	51	assert(providers != NULL, "valid provider array");
aoqi@0	52
aoqi@0	53	for (int i = 0; i < providers_count; ++i) {
aoqi@0	54	count += providers[i].probe_count;
aoqi@0	55	}
aoqi@0	56	probes = new RegisteredProbes(count);
aoqi@0	57	count = 0;
aoqi@0	58
aoqi@0	59	for (int i = 0; i < providers_count; ++i) {
aoqi@0	60	assert(providers[i].name != NULL, "valid provider name");
aoqi@0	61	assert(providers[i].probe_count == 0 || providers[i].probes != NULL,
aoqi@0	62	"valid probe count");
aoqi@0	63	for (int j = 0; j < providers[i].probe_count; ++j) {
aoqi@0	64	JVM_DTraceProbe* probe = &(providers[i].probes[j]);
aoqi@0	65	assert(probe != NULL, "valid probe");
aoqi@0	66	assert(probe->method != NULL, "valid method");
aoqi@0	67	assert(probe->name != NULL, "valid probe name");
aoqi@0	68	assert(probe->function != NULL, "valid probe function spec");
aoqi@0	69	methodHandle h_method =
aoqi@0	70	methodHandle(THREAD, Method::resolve_jmethod_id(probe->method));
aoqi@0	71	nmethod* nm = AdapterHandlerLibrary::create_dtrace_nmethod(h_method);
aoqi@0	72	if (nm == NULL) {
aoqi@0	73	delete probes;
aoqi@0	74	THROW_MSG_0(vmSymbols::java_lang_RuntimeException(),
aoqi@0	75	"Unable to register DTrace probes (CodeCache: no room for DTrace nmethods).");
aoqi@0	76	}
aoqi@0	77	h_method()->set_not_compilable();
aoqi@0	78	h_method()->set_code(h_method, nm);
aoqi@0	79	probes->nmethod_at_put(count++, nm);
aoqi@0	80	}
aoqi@0	81	}
aoqi@0	82
aoqi@0	83	int handle = pd_activate((void*)probes,
aoqi@0	84	module_name, providers_count, providers);
aoqi@0	85	if (handle < 0) {
aoqi@0	86	delete probes;
aoqi@0	87	THROW_MSG_0(vmSymbols::java_lang_RuntimeException(),
aoqi@0	88	"Unable to register DTrace probes (internal error).");
aoqi@0	89	}
aoqi@0	90	probes->set_helper_handle(handle);
aoqi@0	91	return RegisteredProbes::toOpaqueProbes(probes);
aoqi@0	92	}
aoqi@0	93
aoqi@0	94	jboolean DTraceJSDT::is_probe_enabled(jmethodID method) {
aoqi@0	95	Method* m = Method::resolve_jmethod_id(method);
aoqi@0	96	return nativeInstruction_at(m->code()->trap_address())->is_dtrace_trap();
aoqi@0	97	}
aoqi@0	98
aoqi@0	99	void DTraceJSDT::dispose(OpaqueProbes probes) {
aoqi@0	100	RegisteredProbes* p = RegisteredProbes::toRegisteredProbes(probes);
aoqi@0	101	if (probes != -1 && p != NULL) {
aoqi@0	102	pd_dispose(p->helper_handle());
aoqi@0	103	delete p;
aoqi@0	104	}
aoqi@0	105	}
aoqi@0	106
aoqi@0	107	jboolean DTraceJSDT::is_supported() {
aoqi@0	108	return pd_is_supported();
aoqi@0	109	}
aoqi@0	110
aoqi@0	111	#else // HAVE_DTRACE_H
aoqi@0	112
aoqi@0	113	jlong DTraceJSDT::activate(
aoqi@0	114	jint version, jstring module_name, jint providers_count,
aoqi@0	115	JVM_DTraceProvider* providers, TRAPS) {
aoqi@0	116	return 0;
aoqi@0	117	}
aoqi@0	118
aoqi@0	119	jboolean DTraceJSDT::is_probe_enabled(jmethodID method) {
aoqi@0	120	return false;
aoqi@0	121	}
aoqi@0	122
aoqi@0	123	void DTraceJSDT::dispose(OpaqueProbes probes) {
aoqi@0	124	return;
aoqi@0	125	}
aoqi@0	126
aoqi@0	127	jboolean DTraceJSDT::is_supported() {
aoqi@0	128	return false;
aoqi@0	129	}
aoqi@0	130
aoqi@0	131	#endif // ndef HAVE_DTRACE_H