| /* |
| * 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 PASSED 0 |
| #define STATUS_FAILED 2 |
| |
| typedef struct { |
| char *cls; |
| char *name; |
| char *sig; |
| jlocation loc; |
| } frame_info; |
| |
| static jvmtiEnv *jvmti = NULL; |
| static jvmtiCapabilities caps; |
| static jvmtiEventCallbacks callbacks; |
| static jint result = PASSED; |
| static jboolean printdump = JNI_FALSE; |
| static jmethodID midD = NULL; |
| static jmethodID midRun = NULL; |
| static int framesExpected = 0; |
| static int framesCount = 0; |
| static frame_info frames[] = { |
| {"Lnsk/jvmti/PopFrame/popframe008$TestThread;", "C", "()V", 1}, |
| {"Lnsk/jvmti/PopFrame/popframe008$TestThread;", "B", "()V", 1}, |
| {"Lnsk/jvmti/PopFrame/popframe008$TestThread;", "A", "()V", 1}, |
| {"Lnsk/jvmti/PopFrame/popframe008$TestThread;", "run", "()V", 1} |
| }; |
| |
| void check(jvmtiEnv *jvmti_env, jmethodID mid, jlocation loc, int i) { |
| jvmtiError err; |
| jclass cls; |
| char *sigClass, *name, *sig, *generic; |
| |
| err = (*jvmti_env)->GetMethodDeclaringClass(jvmti_env, mid, &cls); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetMethodDeclaringClass#%d) unexpected error: %s (%d)\n", |
| i, TranslateError(err), err); |
| result = STATUS_FAILED; |
| return; |
| } |
| |
| err = (*jvmti_env)->GetClassSignature(jvmti_env, cls, &sigClass, &generic); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetClassSignature#%d) unexpected error: %s (%d)\n", |
| i, TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| |
| err = (*jvmti_env)->GetMethodName(jvmti_env, mid, &name, &sig, &generic); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetMethodName#%d) unexpected error: %s (%d)\n", |
| i, TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| |
| if (sigClass == NULL || strcmp(sigClass, frames[i].cls) != 0) { |
| printf("(%d) wrong class sig: \"%s\",\n", i, sigClass); |
| printf(" expected: \"%s\"\n", frames[i].cls); |
| result = STATUS_FAILED; |
| } |
| if (name == NULL || strcmp(name, frames[i].name) != 0) { |
| printf("(%d) wrong method name: \"%s\",", i, name); |
| printf(" expected: \"%s\"\n", frames[i].name); |
| result = STATUS_FAILED; |
| } |
| if (sig == NULL || strcmp(sig, frames[i].sig) != 0) { |
| printf("(%d) wrong method sig: \"%s\",", i, sig); |
| printf(" expected: \"%s\"\n", frames[i].sig); |
| result = STATUS_FAILED; |
| } |
| if (loc != frames[i].loc) { |
| printf("(%d) wrong location: 0x%x%08x,", |
| i, (jint)(loc >> 32), (jint)loc); |
| printf(" expected: 0x%x\n", (jint)frames[i].loc); |
| result = STATUS_FAILED; |
| } |
| |
| if (printdump == JNI_TRUE) { |
| printf(">>> \"%s.%s%s\"", sigClass, name, sig); |
| printf(", location: 0x%x%08x\n", (jint)(loc >> 32), (jint)loc); |
| } |
| } |
| |
| |
| void JNICALL Breakpoint(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thread, jmethodID method, jlocation location) { |
| jvmtiError err; |
| |
| if (method != midD) { |
| printf("bp: don't know where we get called from"); |
| result = STATUS_FAILED; |
| return; |
| } |
| if (printdump == JNI_TRUE) { |
| printf(">>> breakpoint in D\n"); |
| } |
| err = (*jvmti_env)->ClearBreakpoint(jvmti_env, midD, 0); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(ClearBreakpoint) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| return; |
| } |
| |
| if (caps.can_pop_frame) { |
| framesExpected = 4; |
| err = (*jvmti_env)->SetEventNotificationMode(jvmti_env, JVMTI_ENABLE, |
| JVMTI_EVENT_SINGLE_STEP, thread); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("Cannot enable single step: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| |
| err = (*jvmti_env)->PopFrame(jvmti_env, thread); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(PopFrame) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| } |
| } |
| |
| void JNICALL SingleStep(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thread, jmethodID method, jlocation location) { |
| jvmtiError err; |
| |
| check(jvmti_env, method, location, framesCount); |
| framesCount++; |
| |
| if (method == midRun) { |
| if (printdump == JNI_TRUE) { |
| printf(">>> poped %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: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| } else { |
| err = (*jvmti_env)->PopFrame(jvmti_env, thread); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(PopFrame) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| } |
| } |
| |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_popframe008(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_popframe008(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_popframe008(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) { |
| 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_pop_frame) { |
| printf("Warning: PopFrame is not implemented\n"); |
| } |
| |
| if (caps.can_generate_breakpoint_events && |
| caps.can_generate_single_step_events) { |
| callbacks.Breakpoint = &Breakpoint; |
| callbacks.SingleStep = &SingleStep; |
| 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_PopFrame_popframe008_getReady(JNIEnv *env, |
| jclass cls, jthread thr) { |
| jvmtiError err; |
| jclass clazz; |
| |
| if (jvmti == NULL) { |
| printf("JVMTI client was not properly loaded!\n"); |
| result = STATUS_FAILED; |
| return; |
| } |
| |
| if (!caps.can_pop_frame || |
| !caps.can_generate_breakpoint_events || |
| !caps.can_generate_single_step_events) { |
| return; |
| } |
| |
| clazz = JNI_ENV_PTR(env)->GetObjectClass(JNI_ENV_ARG(env, thr)); |
| if (clazz == NULL) { |
| printf("Cannot get class of the thread object\n"); |
| result = STATUS_FAILED; |
| return; |
| } |
| |
| midD = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, clazz), "D", "()V"); |
| if (midD == NULL) { |
| printf("Cannot get Method ID for method \"D\"\n"); |
| result = STATUS_FAILED; |
| return; |
| } |
| |
| midRun = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, clazz), |
| "run", "()V"); |
| if (midRun == NULL) { |
| printf("Cannot get Method ID for method \"run\"\n"); |
| result = STATUS_FAILED; |
| return; |
| } |
| |
| err = (*jvmti)->SetBreakpoint(jvmti, midD, 0); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(SetBreakpoint) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| return; |
| } |
| |
| 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); |
| result = STATUS_FAILED; |
| } |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_nsk_jvmti_PopFrame_popframe008_getRes(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 |
