82 lines
2.5 KiB
C++
82 lines
2.5 KiB
C++
/*
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* Copyright (c) 2003, 2024, 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 "jvmti.h"
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#include "jvmti_common.hpp"
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extern "C" {
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static jvmtiEnv *jvmti_env = nullptr;
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JNIEXPORT jint JNICALL
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Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) {
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jvmtiCapabilities caps;
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jint res;
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res = jvm->GetEnv((void **) &jvmti_env, JVMTI_VERSION_1_1);
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if (res != JNI_OK || jvmti_env == nullptr) {
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LOG("Wrong result of a valid call to GetEnv!\n");
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return JNI_ERR;
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}
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memset(&caps, 0, sizeof(caps));
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caps.can_support_virtual_threads = true;
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caps.can_suspend = true;
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jvmtiError err = jvmti_env->AddCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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LOG("(AddCapabilities) unexpected error: %s (%d)\n", TranslateError(err), err);
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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 jboolean JNICALL
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Java_framecnt01_checkFrames0(JNIEnv *jni, jclass cls, jthread thread, jboolean suspend, jint expected_count) {
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jboolean result = JNI_TRUE;
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if (suspend) {
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suspend_thread(jvmti_env, jni, thread);
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}
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LOG("Testing:\n");
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print_stack_trace(jvmti_env, jni, thread);
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jint frame_count = get_frame_count(jvmti_env, jni, thread);
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if (frame_count != expected_count) {
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LOG("Thread #%s: number of frames expected: %d, got: %d\n",
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get_thread_name(jvmti_env, jni, thread), expected_count, frame_count);
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result = JNI_FALSE;
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print_stack_trace(jvmti_env, jni, thread); // DBG: print stack trace once more
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}
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if (suspend) {
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resume_thread(jvmti_env, jni, thread);
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}
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return result;
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}
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}
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