267 lines
8.9 KiB
C++
267 lines
8.9 KiB
C++
/*
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* Copyright (c) 2003, 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 <string.h>
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#include <inttypes.h>
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#include "jvmti.h"
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#include "agent_common.h"
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#include "jni_tools.h"
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#include "JVMTITools.h"
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extern "C" {
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#define PASSED 0
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#define STATUS_FAILED 2
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typedef struct {
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const char *cls_sig;
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const char *name;
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const char *sig;
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jlocation loc;
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} exit_info;
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static jvmtiEnv *jvmti = NULL;
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static jvmtiCapabilities caps;
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static jvmtiEventCallbacks callbacks;
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static jint result = PASSED;
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static jboolean printdump = JNI_FALSE;
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static size_t eventsExpected = 0;
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static size_t eventsCount = 0;
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static exit_info exits[] = {
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{ "Lnsk/jvmti/MethodExit/mexit002a;", "chain", "()V", -1 },
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{ "Lnsk/jvmti/MethodExit/mexit002a;", "dummy", "()V", 3 }
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};
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void JNICALL MethodExit(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thr, jmethodID method,
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jboolean was_poped_by_exc, jvalue return_value) {
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jvmtiError err;
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char *cls_sig, *name, *sig, *generic;
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jclass cls;
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jmethodID mid;
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jlocation loc;
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char buffer[32];
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err = jvmti_env->GetMethodDeclaringClass(method, &cls);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetMethodDeclaringClass) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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err = jvmti_env->GetClassSignature(cls, &cls_sig, &generic);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetClassSignature) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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if (cls_sig != NULL &&
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strcmp(cls_sig, "Lnsk/jvmti/MethodExit/mexit002a;") == 0) {
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if (printdump == JNI_TRUE) {
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printf(">>> retrieving method exit info ...\n");
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}
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err = jvmti_env->GetMethodName(method,
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&name, &sig, &generic);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetMethodName) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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err = jvmti_env->GetFrameLocation(thr, 0, &mid, &loc);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetFrameLocation) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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if (printdump == JNI_TRUE) {
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printf(">>> class: \"%s\"\n", cls_sig);
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printf(">>> method: \"%s%s\"\n", name, sig);
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printf(">>> location: %s\n", jlong_to_string(loc, buffer));
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printf(">>> ... done\n");
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}
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if (eventsCount < sizeof(exits)/sizeof(exit_info)) {
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if (cls_sig == NULL ||
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strcmp(cls_sig, exits[eventsCount].cls_sig) != 0) {
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printf("(exit#%" PRIuPTR ") wrong class: \"%s\"",
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eventsCount, cls_sig);
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printf(", expected: \"%s\"\n", exits[eventsCount].cls_sig);
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result = STATUS_FAILED;
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}
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if (name == NULL ||
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strcmp(name, exits[eventsCount].name) != 0) {
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printf("(exit#%" PRIuPTR ") wrong method name: \"%s\"",
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eventsCount, name);
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printf(", expected: \"%s\"\n", exits[eventsCount].name);
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result = STATUS_FAILED;
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}
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if (sig == NULL ||
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strcmp(sig, exits[eventsCount].sig) != 0) {
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printf("(exit#%" PRIuPTR ") wrong method sig: \"%s\"",
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eventsCount, sig);
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printf(", expected: \"%s\"\n", exits[eventsCount].sig);
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result = STATUS_FAILED;
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}
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if (loc != exits[eventsCount].loc) {
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printf("(exit#%" PRIuPTR ") wrong location: %s",
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eventsCount, jlong_to_string(loc, buffer));
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printf(", expected: %s\n",
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jlong_to_string(exits[eventsCount].loc, buffer));
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result = STATUS_FAILED;
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}
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} else {
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printf("Unexpected method exit catched:");
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printf(" class: \"%s\"\n", cls_sig);
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printf(" method: \"%s%s\"\n", name, sig);
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printf(" location: %s\n", jlong_to_string(loc, buffer));
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result = STATUS_FAILED;
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}
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eventsCount++;
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}
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}
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#ifdef STATIC_BUILD
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JNIEXPORT jint JNICALL Agent_OnLoad_mexit002(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_mexit002(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_mexit002(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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jvmtiError err;
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jint res;
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if (options != NULL && strcmp(options, "printdump") == 0) {
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printdump = JNI_TRUE;
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}
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res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
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if (res != JNI_OK || jvmti == NULL) {
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printf("Wrong result of a valid call to GetEnv!\n");
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return JNI_ERR;
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}
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err = jvmti->GetPotentialCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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err = jvmti->AddCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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printf("(AddCapabilities) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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err = jvmti->GetCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetCapabilities) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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if (caps.can_generate_method_exit_events) {
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callbacks.MethodExit = &MethodExit;
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err = jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks));
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if (err != JVMTI_ERROR_NONE) {
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printf("(SetEventCallbacks) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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} else {
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printf("Warning: MethodExit event is not implemented\n");
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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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Java_nsk_jvmti_MethodExit_mexit002_check(JNIEnv *env, jclass cls) {
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jvmtiError err;
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jclass clz;
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jmethodID mid;
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if (jvmti == NULL) {
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printf("JVMTI client was not properly loaded!\n");
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return STATUS_FAILED;
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}
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if (!caps.can_generate_method_exit_events) {
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return result;
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}
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clz = env->FindClass("nsk/jvmti/MethodExit/mexit002a");
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if (clz == NULL) {
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printf("Failed to find class \"mexit002a\"!\n");
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return STATUS_FAILED;
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}
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mid = env->GetStaticMethodID(clz, "dummy", "()V");
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if (mid == NULL) {
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printf("Failed to get method \"dummy\"!\n");
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return STATUS_FAILED;
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}
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err = jvmti->SetEventNotificationMode(JVMTI_ENABLE,
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JVMTI_EVENT_METHOD_EXIT, NULL);
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if (err == JVMTI_ERROR_NONE) {
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eventsExpected = sizeof(exits)/sizeof(exit_info);
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} else {
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printf("Failed to enable JVMTI_EVENT_METHOD_EXIT event: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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env->CallStaticVoidMethod(clz, mid);
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err = jvmti->SetEventNotificationMode(JVMTI_DISABLE,
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JVMTI_EVENT_METHOD_EXIT, NULL);
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if (err != JVMTI_ERROR_NONE) {
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printf("Failed to disable JVMTI_EVENT_METHOD_EXIT event: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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if (eventsCount != eventsExpected) {
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printf("Wrong number of method exit events: %" PRIuPTR ", expected: %" PRIuPTR "\n",
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eventsCount, eventsExpected);
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result = STATUS_FAILED;
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}
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return result;
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}
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JNIEXPORT void JNICALL
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Java_nsk_jvmti_MethodExit_mexit002a_chain(JNIEnv *env, jclass cls) {
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if (printdump == JNI_TRUE) {
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printf(">>> about to exit method chain ...\n");
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}
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}
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}
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