295 lines
9.8 KiB
C++
295 lines
9.8 KiB
C++
/*
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* Copyright (c) 2004, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <jvmti.h>
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#include "agent_common.h"
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#include "nsk_tools.h"
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#include "native_thread.h"
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#include "JVMTITools.h"
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#include "jvmti_tools.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define PASSED 0
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#define STATUS_FAILED 2
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#define MAX_ATTEMPTS 15
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static const char *expHSMethod = "redefclass030HotMethod";
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static const char *expHSSignature = "(I)V";
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#define EVENTS_COUNT 2
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static jvmtiEvent eventsList[EVENTS_COUNT] = {
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JVMTI_EVENT_COMPILED_METHOD_LOAD,
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JVMTI_EVENT_COMPILED_METHOD_UNLOAD
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};
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static jvmtiEnv *jvmti = NULL;
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static jlong timeout = 0;
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static volatile int fire = 0; /* CompiledMethodLoad received for hotspot method */
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static jmethodID hsMethodID; /* hotspot method ID */
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static volatile int enteredHotMethod = 0; /* "hot" method is entered */
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static jint bytesCount; /* number of bytes of a redefining class */
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static jbyte *clsBytes; /* bytes defining a redefining class */
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/** pass info about redefinition to Java **/
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JNIEXPORT jboolean JNICALL Java_nsk_jvmti_RedefineClasses_redefclass030_isRedefinitionOccurred
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(JNIEnv *jni_env, jclass cls)
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{
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if (fire == 1) {
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NSK_DISPLAY0("isRedefinitionOccurred is called: fired!\n");
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return JNI_TRUE;
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} else {
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return JNI_FALSE;
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}
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}
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/** notify native agent from Java when "hot" method is executed **/
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JNIEXPORT void JNICALL Java_nsk_jvmti_RedefineClasses_redefclass030_notifyNativeAgent
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(JNIEnv *jni_env, jclass cls)
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{
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if (enteredHotMethod == 0) {
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NSK_DISPLAY0("notifyNativeAgent is called\n");
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enteredHotMethod = 1;
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}
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}
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/** pass bytecode to native agent for redefinition **/
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JNIEXPORT void JNICALL Java_nsk_jvmti_RedefineClasses_redefclass030_storeClassBytes
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(JNIEnv *jni_env, jclass cls, jbyteArray classBytes) {
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jboolean isCopy;
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bytesCount = NSK_CPP_STUB2(GetArrayLength, jni_env, classBytes);
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clsBytes =
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NSK_CPP_STUB3(GetByteArrayElements, jni_env, classBytes, &isCopy);
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}
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/** callback functions **/
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void JNICALL
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CompiledMethodLoad(jvmtiEnv *jvmti_env, jmethodID method, jint code_size,
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const void* code_addr, jint map_length, const jvmtiAddrLocationMap* map,
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const void* compile_info) {
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char *name;
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char *sig;
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NSK_DISPLAY0("CompiledMethodLoad event received for:\n");
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if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB5(GetMethodName,
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jvmti_env, method, &name, &sig, NULL))) {
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nsk_jvmti_setFailStatus();
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return;
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}
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NSK_DISPLAY5("\tmethod: name=\"%s\" signature=\"%s\"\n"
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"\tcompiled code size=%d\n"
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"\tstarting native address=0x%p\n"
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"\tnumber of address location map entries=%d\n",
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name, sig, code_size, code_addr, map_length);
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if ((strcmp(name, expHSMethod) == 0) &&
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(strcmp(sig, expHSSignature) == 0)) {
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NSK_DISPLAY0("CompiledMethodLoad: a tested hotspot method found\n");
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// CR 6604375: check whether "hot" method was entered
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if (enteredHotMethod) {
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hsMethodID = method;
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fire = 1;
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} else {
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NSK_DISPLAY0("Compilation occured before method execution. Ignoring.\n");
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}
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}
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}
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JNIEXPORT void JNICALL
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CompiledMethodUnload(jvmtiEnv* jvmti_env, jmethodID method,
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const void* code_addr) {
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char *name;
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char *sig;
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jvmtiError err;
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NSK_DISPLAY0("CompiledMethodUnload event received\n");
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// Check for the case that the class has been unloaded
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err = jvmti_env->GetMethodName(method, &name, &sig, NULL);
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if (err == JVMTI_ERROR_NONE) {
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NSK_DISPLAY3("for: \tmethod: name=\"%s\" signature=\"%s\"\n\tnative address=0x%p\n",
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name, sig, code_addr);
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NSK_CPP_STUB2(Deallocate, jvmti_env, (unsigned char*)name);
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NSK_CPP_STUB2(Deallocate, jvmti_env, (unsigned char*)sig);
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}
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}
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/************************/
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/** agent's procedure **/
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static void JNICALL
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agentProc(jvmtiEnv* jvmti_env, JNIEnv* jni_env, void* arg) {
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int tries = 0;
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jclass decl_cls;
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char *cls_sig;
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jvmtiClassDefinition classDef;
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/* testing sync */
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NSK_DISPLAY1("agentProc: waiting for the debuggee start for %d msecs...\n\n",
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(int) timeout);
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if (!nsk_jvmti_waitForSync(timeout))
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return;
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NSK_DISPLAY0("agentProc: resuming the debuggee ...\n\n");
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if (!nsk_jvmti_resumeSync())
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return;
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/* at first, send all generated CompiledMethodLoad events */
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NSK_DISPLAY0("agentProc: sending all generated CompiledMethodLoad events ...\n\n");
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if (!NSK_JVMTI_VERIFY(
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NSK_CPP_STUB2(GenerateEvents, jvmti, JVMTI_EVENT_COMPILED_METHOD_LOAD))) {
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nsk_jvmti_setFailStatus();
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nsk_jvmti_resumeSync();
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return;
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}
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NSK_DISPLAY0("agentProc: waiting for hotspot method compilation...\n\n");
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do {
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THREAD_sleep(1);
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tries++;
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if (tries > MAX_ATTEMPTS) {
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printf("WARNING: CompiledMethodLoad event is still not received for \"%s\" after %d attempts\n"
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"\tThe test has no results\n\n",
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expHSMethod, MAX_ATTEMPTS);
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nsk_jvmti_resumeSync();
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exit(95 + PASSED);
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}
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} while(fire == 0);
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NSK_DISPLAY0("agentProc: hotspot method compiled\n\n");
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if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(GetMethodDeclaringClass,
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jvmti_env, hsMethodID, &decl_cls))) {
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nsk_jvmti_setFailStatus();
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nsk_jvmti_resumeSync();
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return;
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}
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if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(GetClassSignature,
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jvmti_env, decl_cls, &cls_sig, NULL))) {
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nsk_jvmti_setFailStatus();
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nsk_jvmti_resumeSync();
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return;
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} else {
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NSK_DISPLAY1("agentProc: hotspot method class signature: \"%s\"\n\n",
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cls_sig);
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}
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/* fill the structure jvmtiClassDefinition */
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classDef.klass = decl_cls;
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classDef.class_byte_count = bytesCount;
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classDef.class_bytes = (unsigned char*) clsBytes;
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NSK_DISPLAY1("agentProc: >>>>>>>> Invoke RedefineClasses():\n"
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"\tnew class byte count=%d\n",
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classDef.class_byte_count);
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if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(RedefineClasses,
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jvmti, 1, &classDef))) {
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nsk_jvmti_setFailStatus();
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nsk_jvmti_resumeSync();
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return;
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}
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NSK_DISPLAY0("agentProc: <<<<<<<< RedefineClasses() is successfully done\n");
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/* testing sync */
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NSK_DISPLAY1("agentProc: waiting for the debuggee finish for %d msecs...\n\n",
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(int) timeout);
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if (!nsk_jvmti_waitForSync(timeout))
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return;
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NSK_DISPLAY0("agentProc: final resuming of the debuggee ...\n\n");
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if (!nsk_jvmti_resumeSync())
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return;
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NSK_DISPLAY0("agentProc: finished\n\n");
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}
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#ifdef STATIC_BUILD
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JNIEXPORT jint JNICALL Agent_OnLoad_redefclass030(JavaVM *jvm, char *options, void *reserved) {
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return Agent_Initialize(jvm, options, reserved);
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}
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JNIEXPORT jint JNICALL Agent_OnAttach_redefclass030(JavaVM *jvm, char *options, void *reserved) {
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return Agent_Initialize(jvm, options, reserved);
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}
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JNIEXPORT jint JNI_OnLoad_redefclass030(JavaVM *jvm, char *options, void *reserved) {
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return JNI_VERSION_1_8;
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}
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#endif
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jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
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jvmtiCapabilities caps;
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jvmtiEventCallbacks callbacks;
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/* init framework and parse options */
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if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
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return JNI_ERR;
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/* obtain WAITTIME parameter */
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timeout = nsk_jvmti_getWaitTime() * 60000;
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NSK_DISPLAY1("waittime=%d msecs\n", (int) timeout);
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/* create JVMTI environment */
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if (!NSK_VERIFY((jvmti =
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nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))
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return JNI_ERR;
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/* add required capabilities */
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memset(&caps, 0, sizeof(jvmtiCapabilities));
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caps.can_generate_compiled_method_load_events = 1;
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caps.can_redefine_classes = 1;
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if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(AddCapabilities,
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jvmti, &caps)))
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return JNI_ERR;
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/* set event callback */
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NSK_DISPLAY0("setting event callbacks ...\n");
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(void) memset(&callbacks, 0, sizeof(callbacks));
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callbacks.CompiledMethodLoad = &CompiledMethodLoad;
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callbacks.CompiledMethodUnload = &CompiledMethodUnload;
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if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetEventCallbacks,
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jvmti, &callbacks, sizeof(callbacks))))
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return JNI_ERR;
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NSK_DISPLAY0("setting event callbacks done\nenabling events ...\n");
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if (!nsk_jvmti_enableEvents(JVMTI_ENABLE, EVENTS_COUNT,
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eventsList, NULL))
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return JNI_ERR;
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NSK_DISPLAY0("enabling the events done\n\n");
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/* register agent proc */
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if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL)))
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return JNI_ERR;
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return JNI_OK;
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}
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#ifdef __cplusplus
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}
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#endif
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