317 lines
9.8 KiB
C++
317 lines
9.8 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 "jvmti.h"
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#include "agent_common.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;
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const char *name;
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const char *sig;
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jlocation loc;
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} frame_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 jmethodID midD = NULL;
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static jmethodID midRun = NULL;
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static int framesExpected = 0;
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static int framesCount = 0;
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static frame_info frames[] = {
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{"Lnsk/jvmti/PopFrame/popframe008$TestThread;", "C", "()V", 1},
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{"Lnsk/jvmti/PopFrame/popframe008$TestThread;", "B", "()V", 1},
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{"Lnsk/jvmti/PopFrame/popframe008$TestThread;", "A", "()V", 1},
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{"Lnsk/jvmti/PopFrame/popframe008$TestThread;", "run", "()V", 1}
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};
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void check(jvmtiEnv *jvmti_env, jmethodID mid, jlocation loc, int i) {
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jvmtiError err;
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jclass cls;
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char *sigClass, *name, *sig, *generic;
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err = jvmti_env->GetMethodDeclaringClass(mid, &cls);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetMethodDeclaringClass#%d) unexpected error: %s (%d)\n",
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i, TranslateError(err), err);
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result = STATUS_FAILED;
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return;
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}
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err = jvmti_env->GetClassSignature(cls, &sigClass, &generic);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetClassSignature#%d) unexpected error: %s (%d)\n",
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i, TranslateError(err), err);
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result = STATUS_FAILED;
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}
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err = jvmti_env->GetMethodName(mid, &name, &sig, &generic);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetMethodName#%d) unexpected error: %s (%d)\n",
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i, TranslateError(err), err);
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result = STATUS_FAILED;
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}
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if (sigClass == NULL || strcmp(sigClass, frames[i].cls) != 0) {
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printf("(%d) wrong class sig: \"%s\",\n", i, sigClass);
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printf(" expected: \"%s\"\n", frames[i].cls);
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result = STATUS_FAILED;
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}
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if (name == NULL || strcmp(name, frames[i].name) != 0) {
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printf("(%d) wrong method name: \"%s\",", i, name);
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printf(" expected: \"%s\"\n", frames[i].name);
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result = STATUS_FAILED;
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}
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if (sig == NULL || strcmp(sig, frames[i].sig) != 0) {
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printf("(%d) wrong method sig: \"%s\",", i, sig);
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printf(" expected: \"%s\"\n", frames[i].sig);
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result = STATUS_FAILED;
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}
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if (loc != frames[i].loc) {
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printf("(%d) wrong location: 0x%x%08x,",
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i, (jint)(loc >> 32), (jint)loc);
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printf(" expected: 0x%x\n", (jint)frames[i].loc);
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result = STATUS_FAILED;
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}
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if (printdump == JNI_TRUE) {
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printf(">>> \"%s.%s%s\"", sigClass, name, sig);
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printf(", location: 0x%x%08x\n", (jint)(loc >> 32), (jint)loc);
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}
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}
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void JNICALL Breakpoint(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thread, jmethodID method, jlocation location) {
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jvmtiError err;
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if (method != midD) {
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printf("bp: don't know where we get called from");
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result = STATUS_FAILED;
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return;
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}
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if (printdump == JNI_TRUE) {
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printf(">>> breakpoint in D\n");
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}
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err = jvmti_env->ClearBreakpoint(midD, 0);
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if (err != JVMTI_ERROR_NONE) {
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printf("(ClearBreakpoint) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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return;
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}
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if (caps.can_pop_frame) {
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framesExpected = 4;
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err = jvmti_env->SetEventNotificationMode(JVMTI_ENABLE,
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JVMTI_EVENT_SINGLE_STEP, thread);
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if (err != JVMTI_ERROR_NONE) {
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printf("Cannot enable single step: %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->PopFrame(thread);
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if (err != JVMTI_ERROR_NONE) {
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printf("(PopFrame) 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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}
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}
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void JNICALL SingleStep(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thread, jmethodID method, jlocation location) {
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jvmtiError err;
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check(jvmti_env, method, location, framesCount);
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framesCount++;
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if (method == midRun) {
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if (printdump == JNI_TRUE) {
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printf(">>> poped %d frames till method \"run()\"\n",
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framesCount);
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}
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err = jvmti_env->SetEventNotificationMode(JVMTI_DISABLE,
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JVMTI_EVENT_SINGLE_STEP, thread);
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if (err != JVMTI_ERROR_NONE) {
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printf("Cannot disable single step: %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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} else {
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err = jvmti_env->PopFrame(thread);
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if (err != JVMTI_ERROR_NONE) {
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printf("(PopFrame) 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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}
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}
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#ifdef STATIC_BUILD
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JNIEXPORT jint JNICALL Agent_OnLoad_popframe008(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_popframe008(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_popframe008(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_pop_frame) {
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printf("Warning: PopFrame is not implemented\n");
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}
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if (caps.can_generate_breakpoint_events &&
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caps.can_generate_single_step_events) {
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callbacks.Breakpoint = &Breakpoint;
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callbacks.SingleStep = &SingleStep;
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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: Breakpoint or SingleStep event are not implemented\n");
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}
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return JNI_OK;
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}
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JNIEXPORT void JNICALL
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Java_nsk_jvmti_PopFrame_popframe008_getReady(JNIEnv *env,
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jclass cls, jthread thr) {
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jvmtiError err;
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jclass clazz;
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if (jvmti == NULL) {
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printf("JVMTI client was not properly loaded!\n");
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result = STATUS_FAILED;
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return;
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}
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if (!caps.can_pop_frame ||
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!caps.can_generate_breakpoint_events ||
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!caps.can_generate_single_step_events) {
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return;
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}
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clazz = env->GetObjectClass(thr);
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if (clazz == NULL) {
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printf("Cannot get class of the thread object\n");
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result = STATUS_FAILED;
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return;
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}
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midD = env->GetMethodID(clazz, "D", "()V");
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if (midD == NULL) {
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printf("Cannot get Method ID for method \"D\"\n");
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result = STATUS_FAILED;
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return;
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}
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midRun = env->GetMethodID(clazz, "run", "()V");
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if (midRun == NULL) {
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printf("Cannot get Method ID for method \"run\"\n");
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result = STATUS_FAILED;
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return;
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}
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err = jvmti->SetBreakpoint(midD, 0);
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if (err != JVMTI_ERROR_NONE) {
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printf("(SetBreakpoint) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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return;
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}
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err = jvmti->SetEventNotificationMode(JVMTI_ENABLE,
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JVMTI_EVENT_BREAKPOINT, NULL);
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if (err != JVMTI_ERROR_NONE) {
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printf("Failed to enable BREAKPOINT 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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}
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JNIEXPORT jint JNICALL
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Java_nsk_jvmti_PopFrame_popframe008_getRes(JNIEnv *env, jclass cls) {
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if (framesCount != framesExpected) {
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printf("Wrong number of poped frames: %d, expected: %d\n",
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framesCount, framesExpected);
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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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}
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