255 lines
8.4 KiB
C
255 lines
8.4 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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#define INV_SLOT (-1)
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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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void JNICALL Breakpoint(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thr, jmethodID method, jlocation location) {
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jvmtiError err;
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jmethodID mid;
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jlocation loc;
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jint entryCount;
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jvmtiLocalVariableEntry *table;
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int i;
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err = (*jvmti_env)->GetFrameLocation(jvmti_env, thr, 1, &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(">>> obtaining local variables mapping ...\n");
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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) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return;
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}
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if (printdump == JNI_TRUE) {
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printf(">>> checking on type mismatch ...\n");
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}
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for (i = 0; i < entryCount; i++) {
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if (strlen(table[i].name) != 1) continue;
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if (strcmp(table[i].name, "o") != 0) {
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err = (*jvmti_env)->SetLocalObject(jvmti_env, thr, 1,
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table[i].slot, (jobject)thr);
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if (err != JVMTI_ERROR_TYPE_MISMATCH) {
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printf("\"%s\" against SetLocalObject:\n", table[i].name);
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printf(" expected: JVMTI_ERROR_TYPE_MISMATCH,");
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printf(" actual: %s (%d)\n", TranslateError(err), err);
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result = STATUS_FAILED;
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}
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}
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if (strcmp(table[i].name, "i") != 0) {
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err = (*jvmti_env)->SetLocalInt(jvmti_env, thr, 1,
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table[i].slot, (jint)0);
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if (err != JVMTI_ERROR_TYPE_MISMATCH) {
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printf("\"%s\" against SetLocalInt:\n", table[i].name);
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printf(" expected: JVMTI_ERROR_TYPE_MISMATCH,");
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printf(" actual: %s (%d)\n", TranslateError(err), err);
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result = STATUS_FAILED;
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}
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}
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if (strcmp(table[i].name, "l") != 0) {
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err = (*jvmti_env)->SetLocalLong(jvmti_env, thr, 1,
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table[i].slot, (jlong)0);
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if (err != JVMTI_ERROR_TYPE_MISMATCH) {
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printf("\"%s\" against SetLocalLong:\n", table[i].name);
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printf(" expected: JVMTI_ERROR_TYPE_MISMATCH,");
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printf(" actual: %s (%d)\n", TranslateError(err), err);
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result = STATUS_FAILED;
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}
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}
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if (strcmp(table[i].name, "f") != 0) {
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err = (*jvmti_env)->SetLocalFloat(jvmti_env, thr, 1,
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table[i].slot, (jfloat)0);
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if (err != JVMTI_ERROR_TYPE_MISMATCH) {
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printf("\"%s\" against SetLocalFloat:\n", table[i].name);
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printf(" expected: JVMTI_ERROR_TYPE_MISMATCH,");
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printf(" actual: %s (%d)\n", TranslateError(err), err);
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result = STATUS_FAILED;
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}
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}
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if (strcmp(table[i].name, "d") != 0) {
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err = (*jvmti_env)->SetLocalDouble(jvmti_env, thr, 1,
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table[i].slot, (jdouble)0);
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if (err != JVMTI_ERROR_TYPE_MISMATCH) {
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printf("\"%s\" against SetLocalDouble:\n", table[i].name);
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printf(" expected: JVMTI_ERROR_TYPE_MISMATCH,");
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printf(" actual: %s (%d)\n", 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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if (printdump == JNI_TRUE) {
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printf(">>> ... done\n");
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}
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}
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#ifdef STATIC_BUILD
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JNIEXPORT jint JNICALL Agent_OnLoad_setlocal004(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_setlocal004(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_setlocal004(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_access_local_variables) {
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printf("Warning: access to local variables is not implemented\n");
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} else if (caps.can_generate_breakpoint_events) {
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callbacks.Breakpoint = &Breakpoint;
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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 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 void JNICALL
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Java_nsk_jvmti_SetLocalVariable_setlocal004_getReady(JNIEnv *env, jclass cls) {
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jvmtiError err;
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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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result = STATUS_FAILED;
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return;
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}
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if (!caps.can_access_local_variables ||
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!caps.can_generate_breakpoint_events) return;
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mid = JNI_ENV_PTR(env)->GetStaticMethodID(JNI_ENV_ARG(env, cls),
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"checkPoint", "()V");
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if (mid == 0) {
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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, mid, 0);
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if (err != JVMTI_ERROR_NONE) {
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printf("Failed to SetBreakpoint: %s (%d)\n", 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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}
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}
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JNIEXPORT jint JNICALL
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Java_nsk_jvmti_SetLocalVariable_setlocal004_getRes(JNIEnv *env, jclass cls) {
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return result;
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}
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#ifdef __cplusplus
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}
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#endif
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