| /* |
| * 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 "jni_tools.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 PASSED 0 |
| #define STATUS_FAILED 2 |
| |
| static jvmtiEnv *jvmti = NULL; |
| static jvmtiCapabilities caps; |
| static jvmtiEventCallbacks callbacks; |
| static jint result = PASSED; |
| static jboolean printdump = JNI_FALSE; |
| static jmethodID mid = NULL; |
| static jvmtiLocalVariableEntry *table = NULL; |
| static jint entryCount = 0; |
| static jint methodExitCnt = -1; |
| |
| void print_LocalVariableEntry(jvmtiLocalVariableEntry *lvt_elem) { |
| printf("\n Var name: %s, slot: %d", lvt_elem->name, lvt_elem->slot); |
| printf(", start_bci: %"LL"d", lvt_elem->start_location); |
| printf(", end_bci: %"LL"d", lvt_elem->start_location + lvt_elem->length); |
| printf(", signature: %s\n", lvt_elem->signature); |
| } |
| |
| void JNICALL MethodExit(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thr, jmethodID method, |
| jboolean was_poped_by_exception, jvalue return_value) { |
| jvmtiError err; |
| jint i; |
| jmethodID frame_method; |
| jlocation location; |
| jint intVal; |
| jfloat floatVal; |
| jdouble doubleVal; |
| jobject obj; |
| |
| if (mid == method) { |
| |
| err = (*jvmti_env)->GetFrameLocation(jvmti_env, thr, 0, |
| &frame_method, &location); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("\t failure: %s (%d)\n", TranslateError(err), err); |
| result = STATUS_FAILED; |
| return; |
| } |
| if (frame_method != method) { |
| printf("\t failure: GetFrameLocation returned wrong jmethodID\n"); |
| result = STATUS_FAILED; |
| return; |
| } |
| |
| printf("\n MethodExit: BEGIN %d, Current frame bci: %"LL"d\n\n", |
| ++methodExitCnt, location); |
| for (i = 0; i < entryCount; i++) { |
| if (table[i].start_location > location || |
| table[i].start_location + table[i].length < location) { |
| continue; /* The local variable is not visible */ |
| } |
| print_LocalVariableEntry(&table[i]); |
| |
| err = (*jvmti)->GetLocalInt(jvmti, thr, 0, table[i].slot, &intVal); |
| printf(" GetLocalInt: %s (%d)\n", TranslateError(err), err); |
| if (err != JVMTI_ERROR_NONE && table[i].signature[0] == 'I') { |
| result = STATUS_FAILED; |
| } |
| |
| err = (*jvmti)->GetLocalFloat(jvmti, thr, 0, table[i].slot, &floatVal); |
| printf(" GetLocalFloat: %s (%d)\n", TranslateError(err), err); |
| if (err != JVMTI_ERROR_NONE && table[i].signature[0] == 'F') { |
| result = STATUS_FAILED; |
| } |
| |
| err = (*jvmti)->GetLocalDouble(jvmti, thr, 0, table[i].slot, &doubleVal); |
| printf(" GetLocalDouble: %s (%d)\n", TranslateError(err), err); |
| if (err != JVMTI_ERROR_NONE && table[i].signature[0] == 'D') { |
| result = STATUS_FAILED; |
| } |
| |
| err = (*jvmti)->GetLocalObject(jvmti, thr, 0, table[i].slot, &obj); |
| printf(" GetLocalObject: %s (%d)\n", TranslateError(err), err); |
| if (err != JVMTI_ERROR_NONE && table[i].signature[0] == 'L') { |
| result = STATUS_FAILED; |
| } |
| } |
| printf("\n MethodExit: END %d\n\n", methodExitCnt); |
| fflush(stdout); |
| } |
| } |
| |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_getlocal003(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_getlocal003(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_getlocal003(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
| jint res; |
| jvmtiError err; |
| |
| if (options != NULL && strcmp(options, "printdump") == 0) { |
| printdump = JNI_TRUE; |
| } |
| |
| res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti), |
| JVMTI_VERSION_1_1); |
| if (res != JNI_OK || jvmti == NULL) { |
| printf("Wrong result of a valid call to GetEnv!\n"); |
| 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_access_local_variables) { |
| printf("Warning: Access to local variables is not implemented\n"); |
| } else if (caps.can_generate_method_exit_events) { |
| callbacks.MethodExit = &MethodExit; |
| 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: MethodExit event is not implemented\n"); |
| } |
| |
| return JNI_OK; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_nsk_jvmti_unit_GetLocalVariable_getlocal003_getMeth(JNIEnv *env, jclass cls) { |
| jvmtiError err; |
| |
| if (jvmti == NULL) { |
| printf("JVMTI client was not properly loaded!\n"); |
| result = STATUS_FAILED; |
| return; |
| } |
| |
| if (!caps.can_access_local_variables || |
| !caps.can_generate_method_exit_events) return; |
| |
| mid = JNI_ENV_PTR(env)->GetStaticMethodID(JNI_ENV_ARG(env, cls), |
| "staticMeth", "(I)I"); |
| if (mid == NULL) { |
| printf("Cannot find Method ID for staticMeth\n"); |
| result = STATUS_FAILED; |
| return; |
| } |
| |
| err = (*jvmti)->GetLocalVariableTable(jvmti, mid, &entryCount, &table); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetLocalVariableTable) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| return; |
| } |
| |
| err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE, |
| JVMTI_EVENT_METHOD_EXIT, NULL); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("Failed to enable metod exit event: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| fflush(stdout); |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_nsk_jvmti_unit_GetLocalVariable_getlocal003_checkLoc(JNIEnv *env, |
| jclass cls, jthread thr) { |
| jvmtiError err; |
| jvmtiLocalVariableEntry *table; |
| jint entryCount; |
| jmethodID mid; |
| jint locVar; |
| jint i, j; |
| int overlap = 0; |
| |
| if (jvmti == NULL) { |
| return; |
| } |
| |
| mid = JNI_ENV_PTR(env)->GetStaticMethodID(JNI_ENV_ARG(env, cls), |
| "staticMeth", "(I)I"); |
| if (mid == NULL) { |
| printf("Cannot find Method ID for staticMeth\n"); |
| result = STATUS_FAILED; |
| return; |
| } |
| |
| err = (*jvmti)->GetLocalVariableTable(jvmti, mid, &entryCount, &table); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetLocalVariableTable) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| return; |
| } |
| |
| for (i = 0; i < entryCount; i++) { |
| print_LocalVariableEntry(&table[i]); |
| |
| err = (*jvmti)->GetLocalInt(jvmti, thr, 1, table[i].slot, &locVar); |
| |
| printf(" GetLocalInt: %s (%d)\n", TranslateError(err), err); |
| if (strcmp(table[i].name, "intArg") == 0) { |
| if (err != JVMTI_ERROR_NONE) { |
| printf(" failure: JVMTI_ERROR_NONE is expected\n"); |
| result = STATUS_FAILED; |
| } |
| } |
| else if (strcmp(table[i].name, "pi") == 0) { |
| if (err != JVMTI_ERROR_TYPE_MISMATCH) { |
| printf(" failure: JVMTI_ERROR_TYPE_MISMATCH is expected\n"); |
| result = STATUS_FAILED; |
| } |
| } else { |
| if (err != JVMTI_ERROR_INVALID_SLOT) { |
| printf(" failure: JVMTI_ERROR_INVALID_SLOT is expected\n"); |
| result = STATUS_FAILED; |
| } |
| } |
| if (table[i].slot != 2) { |
| continue; |
| } |
| |
| for (j = 0; j < entryCount; j++) { |
| /* We do cross checks between all variables having slot #2. |
| * No overlapping between location ranges are allowed. |
| */ |
| if (table[j].slot != 2 || i == j) { |
| continue; |
| } |
| if (table[i].start_location > table[j].start_location + table[j].length || |
| table[j].start_location > table[i].start_location + table[i].length |
| ) { |
| continue; /* Everything is Ok */ |
| } |
| |
| printf(" failure: locations of vars with slot #2 are overlaped:\n"); |
| print_LocalVariableEntry(&table[i]); |
| print_LocalVariableEntry(&table[j]); |
| overlap++; |
| result = STATUS_FAILED; |
| } |
| } |
| if (!overlap) { |
| printf("\n Succes: locations of vars with slot #2 are NOT overlaped\n\n"); |
| } |
| fflush(stdout); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_nsk_jvmti_unit_GetLocalVariable_getlocal003_getRes(JNIEnv *env, jclass cls) { |
| return result; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |
