| /* |
| * Copyright (c) 2007, 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 |
| |
| #define RETURN_FAILED errCode = STATUS_FAILED; fflush(0); return |
| |
| static jvmtiEnv *jvmti = NULL; |
| static jvmtiCapabilities caps; |
| static jvmtiEventCallbacks callbacks; |
| static jint errCode = PASSED; |
| static jboolean printdump = JNI_TRUE; |
| |
| static jmethodID midRun = NULL; |
| static jmethodID midCountDownLong = NULL; |
| static jmethodID midCheckPoint = NULL; |
| |
| static jint framesExpected = 0; |
| static jint framesCount = 0; |
| static jint methodExitEventCount = 0; |
| |
| static const char *cls_exp = "Lnsk/jvmti/unit/ForceEarlyReturn/earlyretlong$earlyretThread;"; |
| |
| static jlong val_exp = 0L; |
| static const char *sig_exp = "(I)J"; |
| static const char *name_exp = "countDownLong"; |
| |
| static const char *argName = "nestingCount"; |
| |
| void check(jvmtiEnv *jvmti_env, jthread thr, jmethodID mid, |
| jlocation loc, jint frame_no) { |
| jvmtiError err; |
| jclass cls; |
| jlocation loc_exp = (frame_no == 0) ? 0x15 : 0xd; |
| char *sigClass, *name, *sig, *generic; |
| jvmtiLocalVariableEntry *table = NULL; |
| jint entryCount = 0; |
| jint argValue; |
| jint j; |
| |
| err = (*jvmti_env)->GetMethodDeclaringClass(jvmti_env, mid, &cls); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetMethodDeclaringClass#%d) unexpected error: %s (%d)\n", |
| frame_no, TranslateError(err), err); |
| RETURN_FAILED; |
| } |
| |
| err = (*jvmti_env)->GetClassSignature(jvmti_env, cls, &sigClass, &generic); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetClassSignature#%d) unexpected error: %s (%d)\n", |
| frame_no, TranslateError(err), err); |
| RETURN_FAILED; |
| } |
| |
| err = (*jvmti_env)->GetMethodName(jvmti_env, mid, &name, &sig, &generic); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetMethodName#%d) unexpected error: %s (%d)\n", |
| frame_no, TranslateError(err), err); |
| RETURN_FAILED; |
| } |
| |
| /* Get Local Variable Table to be able to get the argument value |
| * from current method frame and compare it with the expected value |
| */ |
| err = (*jvmti_env)->GetLocalVariableTable(jvmti_env, mid, &entryCount, &table); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetLocalVariableTable#%d) unexpected error: %s (%d)\n", |
| frame_no, TranslateError(err), err); |
| RETURN_FAILED; |
| } |
| if (table != NULL) { |
| for (j = 0; j < entryCount; j++) { |
| if (strcmp(table[j].name, argName) == 0) { |
| err = (*jvmti_env)->GetLocalInt(jvmti_env, thr, 0, |
| table[j].slot, &argValue); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetLocalInt#%d) unexpected error: %s (%d)\n", |
| frame_no, TranslateError(err), err); |
| RETURN_FAILED; |
| } |
| } |
| } |
| } |
| |
| if (printdump == JNI_TRUE) { |
| printf("\n>>> step %d: \"%s.%s%s\"\n", frame_no, sigClass, name, sig); |
| printf(">>> location: %#x%08x", (jint)(loc >> 32), (jint)loc); |
| printf(", arg value: %d\n", argValue); |
| } |
| |
| if (sigClass == NULL || strcmp(sigClass, cls_exp) != 0) { |
| printf("(step %d) Wrong class sig: \"%s\",\n", frame_no, sigClass); |
| printf(" expected: \"%s\"\n", cls_exp); |
| RETURN_FAILED; |
| } |
| if (name == NULL || strcmp(name, name_exp) != 0) { |
| printf("(step %d) wrong method name: \"%s\",", frame_no, name); |
| printf(" expected: \"%s\"\n", name_exp); |
| RETURN_FAILED; |
| } |
| if (sig == NULL || strcmp(sig, sig_exp) != 0) { |
| printf("(step %d) wrong method sig: \"%s\",", frame_no, sig); |
| printf(" expected: \"%s\"\n", sig_exp); |
| RETURN_FAILED; |
| } |
| if (loc != loc_exp) { |
| printf("(step %d) wrong location: %#x%08x,", |
| frame_no, (jint)(loc >> 32), (jint)loc); |
| printf(" expected: %#x\n", (jint)loc_exp); |
| RETURN_FAILED; |
| } |
| if (argValue != frame_no) { |
| printf("(step %d) wrong argument value: %d,", frame_no, argValue); |
| printf(" expected: %d\n", frame_no); |
| RETURN_FAILED; |
| } |
| |
| if (sigClass != NULL) { |
| (*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)sigClass); |
| } |
| if (name != NULL) { |
| (*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)name); |
| } |
| if (sig != NULL) { |
| (*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)sig); |
| } |
| if (table != NULL) { |
| for (j = 0; j < entryCount; j++) { |
| (*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)(table[j].name)); |
| (*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)(table[j].signature)); |
| } |
| (*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)table); |
| } |
| if (methodExitEventCount != (framesCount + 1)) { |
| printf("(step %d) wrong methodExitEventCount: %d,", |
| frame_no, methodExitEventCount); |
| printf(" expected: %d\n", framesCount + 1); |
| RETURN_FAILED; |
| } |
| fflush(0); |
| } |
| |
| void JNICALL Breakpoint(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thread, jmethodID method, jlocation location) { |
| jvmtiError err; |
| |
| if (midCheckPoint != method) { |
| printf("bp: don't know where we get called from"); |
| RETURN_FAILED; |
| } |
| |
| if (printdump == JNI_TRUE) { |
| printf(">>> breakpoint in checkPoint\n"); |
| } |
| |
| err = (*jvmti_env)->ClearBreakpoint(jvmti_env, midCheckPoint, 0); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(ClearBreakpoint) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| RETURN_FAILED; |
| } |
| |
| err = (*jvmti_env)->SetEventNotificationMode(jvmti_env, JVMTI_ENABLE, |
| JVMTI_EVENT_SINGLE_STEP, thread); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("Cannot enable single step events: %s (%d)\n", |
| TranslateError(err), err); |
| RETURN_FAILED; |
| } |
| |
| err = (*jvmti_env)->SetEventNotificationMode(jvmti_env, JVMTI_ENABLE, |
| JVMTI_EVENT_METHOD_EXIT, thread); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("Cannot enable method exit events: %s (%d)\n", |
| TranslateError(err), err); |
| RETURN_FAILED; |
| } |
| |
| err = (*jvmti_env)->ForceEarlyReturnVoid(jvmti_env, thread); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(ForceEarlyReturn) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| RETURN_FAILED; |
| } |
| fflush(0); |
| } |
| |
| void JNICALL SingleStep(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thread, jmethodID method, jlocation location) { |
| jvmtiError err; |
| |
| if (method == midRun) { |
| if (printdump == JNI_TRUE) { |
| printf(">>> returned early %d frames till method \"run()\"\n", |
| framesCount); |
| } |
| |
| err = (*jvmti_env)->SetEventNotificationMode(jvmti_env, JVMTI_DISABLE, |
| JVMTI_EVENT_SINGLE_STEP, thread); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("Cannot disable single step events: %s (%d)\n", |
| TranslateError(err), err); |
| RETURN_FAILED; |
| } |
| err = (*jvmti_env)->SetEventNotificationMode(jvmti_env, JVMTI_DISABLE, |
| JVMTI_EVENT_METHOD_EXIT, thread); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("Cannot disable method exit events: %s (%d)\n", |
| TranslateError(err), err); |
| RETURN_FAILED; |
| } |
| } else if (method == midCountDownLong) { |
| check(jvmti_env, thread, method, location, framesCount); |
| framesCount++; |
| |
| err = (*jvmti_env)->ForceEarlyReturnLong(jvmti_env, thread, ++val_exp); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(ForceEarlyReturn) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| RETURN_FAILED; |
| } |
| } |
| fflush(0); |
| } |
| |
| void JNICALL MethodExit(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread, |
| jmethodID method, jboolean was_popped_by_exception, jvalue value) { |
| jlong ret_val = value.j; |
| int * val_ptr = (int *) &ret_val; |
| int * exp_ptr = (int *) &val_exp; |
| |
| methodExitEventCount++; |
| if (method == midCountDownLong) { |
| printf(">>> ForceEarlyReturnLong value: dec: %"LL"d, hex: %#x %#x\n", |
| ret_val, val_ptr[0], val_ptr[1]); |
| printf(">>> expected return value: dec: %"LL"d, hex: %#x %#x\n", |
| val_exp, exp_ptr[0], exp_ptr[1]); |
| |
| if (ret_val != val_exp) { |
| printf("Wrong ForceEarlyReturnLong return value: %"LL"d\n", ret_val); |
| errCode = STATUS_FAILED; |
| } |
| if (was_popped_by_exception) { |
| printf("Method was_popped_by_exception unexpectedly\n"); |
| errCode = STATUS_FAILED; |
| } |
| } |
| fflush(0); |
| } |
| |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_earlyretlong(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_earlyretlong(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_earlyretlong(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
| jvmtiError err; |
| jint res; |
| |
| if (options != NULL && strcmp(options, "printdump") == 0) { |
| printf("Printdump is turned on!\n"); |
| |
| 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 error code from 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_force_early_return) { |
| printf("Warning: ForceEarlyReturn is not implemented\n"); |
| } |
| |
| if (caps.can_generate_breakpoint_events && |
| caps.can_generate_method_exit_events && |
| caps.can_generate_single_step_events) |
| { |
| callbacks.Breakpoint = &Breakpoint; |
| callbacks.SingleStep = &SingleStep; |
| 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: Breakpoint or SingleStep event are not implemented\n"); |
| } |
| |
| return JNI_OK; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_nsk_jvmti_unit_ForceEarlyReturn_earlyretlong_getReady( |
| JNIEnv *env, jclass c, jclass cls, jint depth, jlong retval_base) { |
| jvmtiError err; |
| |
| val_exp = retval_base; |
| if (jvmti == NULL) { |
| printf("JVMTI client was not properly loaded!\n"); |
| RETURN_FAILED; |
| } |
| |
| if (!caps.can_force_early_return || |
| !caps.can_generate_breakpoint_events || |
| !caps.can_generate_method_exit_events || |
| !caps.can_generate_single_step_events) { |
| return; |
| } |
| |
| midRun = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, cls), |
| "run", "()V"); |
| if (midRun == NULL) { |
| printf("Cannot find Method ID for method run\n"); |
| RETURN_FAILED; |
| } |
| |
| midCheckPoint = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, cls), |
| "checkPoint", "()V"); |
| if (midCheckPoint == NULL) { |
| printf("Cannot find Method ID for method checkPoint\n"); |
| RETURN_FAILED; |
| } |
| |
| midCountDownLong = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, cls), |
| "countDownLong", "(I)J"); |
| if (midCountDownLong == NULL) { |
| printf("Cannot find Method ID for method countDownLong\n"); |
| RETURN_FAILED; |
| } |
| |
| err = (*jvmti)->SetBreakpoint(jvmti, midCheckPoint, 0); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(SetBreakpoint) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| RETURN_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_FAILED; |
| } else { |
| framesExpected = depth; |
| } |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_nsk_jvmti_unit_ForceEarlyReturn_earlyretlong_printLong( |
| JNIEnv *env, jclass cls, jlong val) { |
| jint *iptr = (int *) &val; |
| |
| printf("\n>>> Returned value: dec: %"LL"d, hex: %#x %#x\n", |
| val, iptr[0], iptr[1]); |
| fflush(0); |
| return; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_nsk_jvmti_unit_ForceEarlyReturn_earlyretlong_check(JNIEnv *env, jclass cls) { |
| if (framesCount != framesExpected) { |
| printf("Wrong number of returned early frames: %d, expected: %d\n", |
| framesCount, framesExpected); |
| errCode = STATUS_FAILED; |
| } |
| fflush(0); |
| return errCode; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |
