365 lines
12 KiB
C
365 lines
12 KiB
C
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/*
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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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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef JNI_ENV_ARG
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#ifdef __cplusplus
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#define JNI_ENV_ARG(x, y) y
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#define JNI_ENV_PTR(x) x
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#else
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#define JNI_ENV_ARG(x,y) x, y
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#define JNI_ENV_PTR(x) (*x)
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#endif
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#endif
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#define PASSED 0
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#define STATUS_FAILED 2
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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 midCheckPoint = NULL;
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static jmethodID midRun = NULL;
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static jint framesExpected = 0;
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static jint framesCount = 0;
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static const char *cls_exp = "Lnsk/jvmti/PopFrame/popframe010$TestThread;";
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static const char *name_exp = "countDown";
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static const char *sig_exp = "(I)V";
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static const char *argName = "nestingCount";
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void check(jvmtiEnv *jvmti_env, jthread thr, jmethodID mid, jlocation loc, jint i) {
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jvmtiError err;
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jclass cls;
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jlocation loc_exp = (i == 0) ? 15 : 8;
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char *sigClass, *name, *sig, *generic;
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jvmtiLocalVariableEntry *table = NULL;
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jint entryCount = 0;
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jint argValue;
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jint j;
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err = (*jvmti_env)->GetMethodDeclaringClass(jvmti_env, 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(jvmti_env, 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(jvmti_env, 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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err = (*jvmti_env)->GetLocalVariableTable(jvmti_env, mid, &entryCount, &table);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetLocalVariableTable#%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 (table != NULL) {
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for (j = 0; j < entryCount; j++) {
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if (strcmp(table[j].name, argName) == 0) {
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err = (*jvmti_env)->GetLocalInt(jvmti_env, thr, 0,
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table[j].slot, &argValue);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetLocalInt#%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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}
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}
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}
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if (printdump == JNI_TRUE) {
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printf(">>> step %d: \"%s.%s%s\"\n", i, sigClass, name, sig);
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printf(">>> location: 0x%x%08x", (jint)(loc >> 32), (jint)loc);
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printf(", arg value: %d\n", argValue);
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}
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if (sigClass == NULL || strcmp(sigClass, cls_exp) != 0) {
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printf("(step %d) wrong class sig: \"%s\",\n", i, sigClass);
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printf(" expected: \"%s\"\n", cls_exp);
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result = STATUS_FAILED;
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}
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if (name == NULL || strcmp(name, name_exp) != 0) {
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printf("(step %d) wrong method name: \"%s\",", i, name);
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printf(" expected: \"%s\"\n", name_exp);
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result = STATUS_FAILED;
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}
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if (sig == NULL || strcmp(sig, sig_exp) != 0) {
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printf("(step %d) wrong method sig: \"%s\",", i, sig);
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printf(" expected: \"%s\"\n", sig_exp);
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result = STATUS_FAILED;
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}
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if (loc != loc_exp) {
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printf("(step %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)loc_exp);
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result = STATUS_FAILED;
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}
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if (argValue != i) {
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printf("(step %d) wrong argument value: %d,", i, argValue);
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printf(" expected: %d\n", i);
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result = STATUS_FAILED;
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}
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if (sigClass != NULL) {
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(*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)sigClass);
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}
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if (name != NULL) {
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(*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)name);
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}
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if (sig != NULL) {
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(*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)sig);
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}
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if (table != NULL) {
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for (j = 0; j < entryCount; j++) {
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(*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)(table[j].name));
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(*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)(table[j].signature));
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}
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(*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)table);
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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 (midCheckPoint != method) {
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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 checkPoint\n");
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}
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err = (*jvmti_env)->ClearBreakpoint(jvmti_env, midCheckPoint, 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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}
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err = (*jvmti_env)->SetEventNotificationMode(jvmti_env, 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(jvmti_env, 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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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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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_env, 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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check(jvmti_env, thread, method, location, framesCount);
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framesCount++;
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err = (*jvmti_env)->PopFrame(jvmti_env, 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_popframe010(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_popframe010(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_popframe010(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 = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti),
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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(jvmti, &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(jvmti, &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(jvmti, &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(jvmti, &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_popframe010_getReady(JNIEnv *env, jclass c, jclass cls, jint depth) {
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jvmtiError err;
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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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midRun = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, cls),
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"run", "()V");
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if (midRun == NULL) {
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printf("Cannot find 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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midCheckPoint = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, cls),
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"checkPoint", "()V");
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if (midCheckPoint == NULL) {
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printf("Cannot find Method ID for method checkPoint\n");
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result = STATUS_FAILED;
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return;
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}
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err = (*jvmti)->SetBreakpoint(jvmti, midCheckPoint, 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, 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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} else {
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framesExpected = depth;
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}
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}
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||
|
|
|
||
|
|
JNIEXPORT jint JNICALL
|
||
|
|
Java_nsk_jvmti_PopFrame_popframe010_check(JNIEnv *env, jclass cls) {
|
||
|
|
if (framesCount != framesExpected) {
|
||
|
|
printf("Wrong number of poped frames: %d, expected: %d\n",
|
||
|
|
framesCount, framesExpected);
|
||
|
|
result = STATUS_FAILED;
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|