97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
/*
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* Copyright (c) 2022, 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 <cstdlib>
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#include <cstring>
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#include <jvmti.h>
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#include "jvmti_common.h"
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extern "C" {
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const int MAX_COUNT = 50;
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static jvmtiEnv *jvmti;
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JNIEXPORT jobjectArray JNICALL
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Java_VirtualStackTraceTest_getStackTrace(JNIEnv* jni, jclass clazz) {
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jvmtiError err;
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jint count = 0;
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jint skipped = 0;
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jobject visibleFrames[MAX_COUNT];
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jvmtiFrameInfo frameInfo[MAX_COUNT];
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err = jvmti->GetStackTrace(NULL, 0, MAX_COUNT, frameInfo, &count);
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check_jvmti_status(jni, err, "event handler: error in JVMTI GetStackTrace call");
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for (int idx = 0; idx < count; idx++) {
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jclass declaringClass = NULL;
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char *clasSignature = NULL;
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char *methodName = NULL;
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err = jvmti->GetMethodDeclaringClass(frameInfo[idx].method, &declaringClass);
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check_jvmti_status(jni, err, "event handler: error in JVMTI GetMethodDeclaringClass call");
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err = jvmti->GetClassSignature(declaringClass, &clasSignature, NULL);
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check_jvmti_status(jni, err, "event handler: error in JVMTI GetClassSignature call");
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err = jvmti->GetMethodName(frameInfo[idx].method, &methodName, NULL, NULL);
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check_jvmti_status(jni, err, "event handler: error in JVMTI GetMethodName call");
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if (strchr(clasSignature, '.')) {
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skipped++;
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continue;
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}
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visibleFrames[idx - skipped] = jni->NewStringUTF(methodName);
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jvmti->Deallocate(reinterpret_cast<unsigned char*>(methodName));
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jvmti->Deallocate(reinterpret_cast<unsigned char*>(clasSignature));
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}
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jobjectArray methodNames = jni->NewObjectArray(count - skipped, jni->FindClass("java/lang/String"), NULL);
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for (int idx = 0; idx < count - skipped; idx++) {
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jni->SetObjectArrayElement(methodNames, idx, visibleFrames[idx]);
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}
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print_stack_trace(jvmti, jni, NULL);
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return methodNames;
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}
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JNIEXPORT jint JNICALL
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Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) {
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LOG("Agent_OnLoad started\n");
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if (jvm->GetEnv((void **) (&jvmti), JVMTI_VERSION) != JNI_OK) {
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return JNI_ERR;
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}
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return JNI_OK;
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}
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JNIEXPORT jint JNICALL
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Agent_OnAttach(JavaVM *jvm, char *options, void *reserved) {
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LOG("Agent_OnAttach started\n");
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if (jvm->GetEnv((void **) (&jvmti), JVMTI_VERSION) != JNI_OK) {
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return JNI_ERR;
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}
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return JNI_OK;
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}
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} // extern "C"
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