| /* |
| * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <jvmti.h> |
| #include "agent_common.h" |
| #include "JVMTITools.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #ifndef JNI_ENV_ARG |
| |
| #ifdef __cplusplus |
| #define JNI_ENV_ARG(x, y) y |
| #define JNI_ENV_PTR(x) x |
| #else |
| #define JNI_ENV_ARG(x,y) x, y |
| #define JNI_ENV_PTR(x) (*x) |
| #endif |
| |
| #endif |
| |
| #define BP_NUM 5 /* overall number of breakpoints */ |
| |
| #define STATUS_FAILED 2 |
| #define PASSED 0 |
| |
| typedef struct { |
| int inst; /* type of a method: 0- static; 1- instance */ |
| char *m_name; /* method name */ |
| char *m_sign; /* JVM signature of a method */ |
| int loc; /* breakpoint location in a method's body */ |
| jmethodID mid; /* JNI's method ID */ |
| } breakpoint; |
| |
| /* list of breakpoints */ |
| static breakpoint breakpoints[] = { |
| {1, (char*) "checkIt", (char*) "(Ljava/io/PrintStream;Z)I", 0, NULL}, |
| {1, (char*) "finMethod", (char*) "(JIJ)V", 5, NULL}, |
| {1, (char*) "finMethod", (char*) "(JIJ)V", 4, NULL}, |
| {1, (char*) "checkIt", (char*) "(Ljava/io/PrintStream;Z)I", 1, NULL}, |
| {0, (char*) "statMethod", (char*) "(III)I", 1, NULL} |
| }; |
| |
| static jclass redefCls; /* JNI's Java class object */ |
| |
| static jvmtiEnv *jvmti = NULL; |
| static jvmtiCapabilities caps; |
| static jvmtiEventCallbacks callbacks; |
| |
| void JNICALL Breakpoint(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thread, jmethodID method, jlocation location) { |
| } |
| |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_redefclass008(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_redefclass008(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_redefclass008(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| jint Agent_Initialize(JavaVM *vm, char *options, void *reserved) { |
| jint res; |
| jvmtiError err; |
| |
| if ((res = JNI_ENV_PTR(vm)->GetEnv(JNI_ENV_ARG(vm, (void **) &jvmti), |
| JVMTI_VERSION_1_1)) != JNI_OK) { |
| printf("%s: Failed to call GetEnv: error=%d\n", __FILE__, res); |
| return JNI_ERR; |
| } |
| |
| err = (*jvmti)->GetPotentialCapabilities(jvmti, &caps); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| return JNI_ERR; |
| } |
| |
| err = (*jvmti)->AddCapabilities(jvmti, &caps); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(AddCapabilities) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| return JNI_ERR; |
| } |
| |
| err = (*jvmti)->GetCapabilities(jvmti, &caps); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetCapabilities) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| return JNI_ERR; |
| } |
| |
| if (!caps.can_redefine_classes) { |
| printf("Warning: RedefineClasses is not implemented\n"); |
| } |
| |
| if (caps.can_generate_breakpoint_events) { |
| callbacks.Breakpoint = &Breakpoint; |
| err = (*jvmti)->SetEventCallbacks(jvmti, &callbacks, sizeof(callbacks)); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(SetEventCallbacks) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| return JNI_ERR; |
| } |
| } else { |
| printf("Warning: Breakpoint event is not implemented\n"); |
| } |
| |
| return JNI_OK; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_nsk_jvmti_RedefineClasses_redefclass008_setBreakpoints(JNIEnv *env, |
| jclass cls, jint vrb, jobject redefObj) { |
| jvmtiError err; |
| int i; |
| |
| if (!caps.can_redefine_classes || !caps.can_generate_breakpoint_events) { |
| return PASSED; |
| } |
| |
| redefCls = |
| JNI_ENV_PTR(env)->GetObjectClass(JNI_ENV_ARG(env, redefObj)); |
| |
| for (i=0; i<BP_NUM; i++) { |
| /* get the JNI method ID for a method with name m_name and |
| signature m_sign */ |
| if (breakpoints[i].inst) { /* an instance method */ |
| if ((breakpoints[i].mid = |
| JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, redefCls), |
| breakpoints[i].m_name, breakpoints[i].m_sign)) == NULL) { |
| printf("%s: Failed to get the method ID for the instance method\ |
| \"%s\" with signature \"%s\"\n", |
| __FILE__, breakpoints[i].m_name, breakpoints[i].m_sign); |
| return STATUS_FAILED; |
| } |
| } else { /* a static method */ |
| if ((breakpoints[i].mid = |
| JNI_ENV_PTR(env)->GetStaticMethodID(JNI_ENV_ARG(env, redefCls), |
| breakpoints[i].m_name, breakpoints[i].m_sign)) == NULL) { |
| printf("%s: Failed to get the method ID for the static method\ |
| \"%s\" with signature \"%s\"\n", |
| __FILE__, breakpoints[i].m_name, breakpoints[i].m_sign); |
| return STATUS_FAILED; |
| } |
| } |
| |
| if (vrb == 1) |
| printf(">>>>>>>> #%d Invoke SetBreakpoint():\n\tbreakpoint in the %s\ |
| method: name=\"%s\"; signature=\"%s\"; location=%d\n", |
| i, breakpoints[i].inst?"instance":"static", |
| breakpoints[i].m_name, breakpoints[i].m_sign, breakpoints[i].loc); |
| if ((err = ((*jvmti)->SetBreakpoint(jvmti, breakpoints[i].mid, |
| breakpoints[i].loc))) != JVMTI_ERROR_NONE) { |
| printf("%s: Failed to call SetBreakpoint(): error=%d: %s\n", |
| __FILE__, err, TranslateError(err)); |
| return STATUS_FAILED; |
| } |
| |
| err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE, |
| JVMTI_EVENT_BREAKPOINT, NULL); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("Failed to enable BREAKPOINT event: %s (%d)\n", |
| TranslateError(err), err); |
| return STATUS_FAILED; |
| } |
| |
| if (vrb == 1) |
| printf("<<<<<<<< #%d SetBreakpoint() is successfully done\n\n", i); |
| } |
| return PASSED; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_nsk_jvmti_RedefineClasses_redefclass008_makeRedefinition(JNIEnv *env, |
| jclass cls, jint vrb, jclass redefCls, jbyteArray classBytes) { |
| jvmtiError err; |
| jvmtiClassDefinition classDef; |
| |
| if (jvmti == NULL) { |
| printf("JVMTI client was not properly loaded!\n"); |
| return STATUS_FAILED; |
| } |
| |
| if (!caps.can_redefine_classes || !caps.can_generate_breakpoint_events) { |
| return PASSED; |
| } |
| |
| /* fill the structure jvmtiClassDefinition */ |
| classDef.klass = redefCls; |
| classDef.class_byte_count = |
| JNI_ENV_PTR(env)->GetArrayLength(JNI_ENV_ARG(env, classBytes)); |
| classDef.class_bytes = (unsigned char *) |
| JNI_ENV_PTR(env)->GetByteArrayElements(JNI_ENV_ARG(env, classBytes), NULL); |
| |
| if (vrb == 1) |
| printf(">>>>>>>> Invoke RedefineClasses():\n\tnew class byte count=%d\n", |
| classDef.class_byte_count); |
| if ((err = ((*jvmti)->RedefineClasses(jvmti, 1, &classDef))) != JVMTI_ERROR_NONE) { |
| printf("%s: Failed to call RedefineClasses(): error=%d: %s\n", |
| __FILE__, err, TranslateError(err)); |
| printf("\tFor more info about this error see the JVMTI spec.\n"); |
| return STATUS_FAILED; |
| } |
| if (vrb == 1) |
| printf("<<<<<<<< RedefineClasses() is successfully done\n\n"); |
| |
| return PASSED; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_nsk_jvmti_RedefineClasses_redefclass008_getResult(JNIEnv *env, |
| jclass cls, jint vrb, jobject redefObj) { |
| jvmtiError err; |
| int i; |
| int totRes = PASSED; |
| |
| if (!caps.can_redefine_classes || !caps.can_generate_breakpoint_events) { |
| return PASSED; |
| } |
| |
| redefCls = |
| JNI_ENV_PTR(env)->GetObjectClass(JNI_ENV_ARG(env, redefObj)); |
| |
| /* all breakpoints should be cleared after the redefinition */ |
| for (i=0; i<BP_NUM; i++) { |
| /* get again the JNI method ID for a method with name m_name and |
| signature m_sign */ |
| if (breakpoints[i].inst) { /* an instance method */ |
| if ((breakpoints[i].mid = |
| JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, redefCls), |
| breakpoints[i].m_name, breakpoints[i].m_sign)) == NULL) { |
| printf("%s: getResult: Failed to get the method ID for the instance method\ |
| \"%s\" with signature \"%s\"\n", |
| __FILE__, breakpoints[i].m_name, breakpoints[i].m_sign); |
| return STATUS_FAILED; |
| } |
| } else { /* a static method */ |
| if ((breakpoints[i].mid = |
| JNI_ENV_PTR(env)->GetStaticMethodID(JNI_ENV_ARG(env, redefCls), |
| breakpoints[i].m_name, breakpoints[i].m_sign)) == NULL) { |
| printf("%s: getResult: Failed to get the method ID for the static method\ |
| \"%s\" with signature \"%s\"\n", |
| __FILE__, breakpoints[i].m_name, breakpoints[i].m_sign); |
| return STATUS_FAILED; |
| } |
| } |
| |
| if ((err = ((*jvmti)->ClearBreakpoint(jvmti, breakpoints[i].mid, |
| breakpoints[i].loc))) != JVMTI_ERROR_NOT_FOUND) { |
| printf("TEST FAILED: Breakpoint #%d in the %s method:\n\ |
| \tname=\"%s\"; signature=\"%s\"; location=%d was not cleared:\n\ |
| \tClearBreakpoint() returned the error %d: %s\n\n", |
| i, breakpoints[i].inst?"instance":"static", |
| breakpoints[i].m_name, breakpoints[i].m_sign, |
| breakpoints[i].loc, err, TranslateError(err)); |
| totRes = STATUS_FAILED; |
| } else { |
| if (vrb == 1) |
| printf("Check #%d PASSED: Breakpoint in the %s method:\n\ |
| \tname=\"%s\"; signature=\"%s\"; location=%d was cleared:\n\ |
| \tClearBreakpoint() returned the error %d: %s\n\n", |
| i, breakpoints[i].inst?"instance":"static", |
| breakpoints[i].m_name, breakpoints[i].m_sign, |
| breakpoints[i].loc, err, TranslateError(err)); |
| if ((err = ((*jvmti)->SetBreakpoint(jvmti, breakpoints[i].mid, |
| breakpoints[i].loc))) == JVMTI_ERROR_DUPLICATE) { |
| printf("TEST FAILED: the function SetBreakpoint() returned the error %d: %s\n\ |
| \ti.e. the breakpoint #%d has not been really cleared.\n\n", |
| err, TranslateError(err), i); |
| totRes = STATUS_FAILED; |
| } |
| } |
| } |
| |
| return totRes; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |
