412 lines
14 KiB
C++
412 lines
14 KiB
C++
/*
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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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typedef struct {
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const char *cls;
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const char *name;
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const char *sig;
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} frame_info;
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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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static jboolean wasFramePop = JNI_FALSE;
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static jthread testedThread;
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static jmethodID mid_checkPoint, mid_chain4;
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static jbyteArray classBytes;
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static frame_info frames[] = {
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{"Lnsk/jvmti/GetStackTrace/getstacktr008$TestThread;", "checkPoint", "()V"},
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{"Lnsk/jvmti/GetStackTrace/getstacktr008$TestThread;", "chain5", "()V"},
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{"Lnsk/jvmti/GetStackTrace/getstacktr008$TestThread;", "chain4", "()V"},
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{"Lnsk/jvmti/GetStackTrace/getstacktr008;", "nativeChain", "()V"},
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{"Lnsk/jvmti/GetStackTrace/getstacktr008$TestThread;", "chain3", "()V"},
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{"Lnsk/jvmti/GetStackTrace/getstacktr008$TestThread;", "chain2", "()V"},
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{"Lnsk/jvmti/GetStackTrace/getstacktr008$TestThread;", "chain1", "()V"},
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{"Lnsk/jvmti/GetStackTrace/getstacktr008$TestThread;", "run", "()V"},
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};
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#define NUMBER_OF_STACK_FRAMES ((int) (sizeof(frames)/sizeof(frame_info)))
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void check(jvmtiEnv *jvmti_env, jthread thr, int offset, const char *note) {
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jvmtiError err;
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jvmtiFrameInfo f[NUMBER_OF_STACK_FRAMES + 1];
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jclass callerClass;
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char *sigClass, *name, *sig, *generic;
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jint i, count;
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if (printdump == JNI_TRUE) {
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printf(">>> checking stack frame for %s ...\n", note);
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}
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err = jvmti_env->GetStackTrace(thr,
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0, NUMBER_OF_STACK_FRAMES + 1, f, &count);
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if (err != JVMTI_ERROR_NONE) {
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printf("(%s, GetStackTrace) unexpected error: %s (%d)\n",
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note, TranslateError(err), err);
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result = STATUS_FAILED;
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return;
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}
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if (printdump == JNI_TRUE) {
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printf(">>> frame count: %d\n", count);
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}
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if (count != (jint)(NUMBER_OF_STACK_FRAMES - offset)) {
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printf("(%s) wrong frame count, expected: %d, actual: %d\n",
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note, NUMBER_OF_STACK_FRAMES, count);
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result = STATUS_FAILED;
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}
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for (i = 0; i < count; i++) {
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if (printdump == JNI_TRUE) {
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printf(">>> checking frame#%d ...\n", i);
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}
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err = jvmti_env->GetMethodDeclaringClass(f[i].method,
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&callerClass);
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if (err != JVMTI_ERROR_NONE) {
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printf("(%s, GetMethodDeclaringClass#%d) unexpected error: %s (%d)\n",
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note, i, TranslateError(err), err);
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result = STATUS_FAILED;
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continue;
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}
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err = jvmti_env->GetClassSignature(callerClass,
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&sigClass, &generic);
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if (err != JVMTI_ERROR_NONE) {
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printf("(%s, GetClassSignature#%d) unexpected error: %s (%d)\n",
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note, i, TranslateError(err), err);
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result = STATUS_FAILED;
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continue;
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}
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err = jvmti_env->GetMethodName(f[i].method,
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&name, &sig, &generic);
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if (err != JVMTI_ERROR_NONE) {
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printf("(%s, GetMethodName#%d) unexpected error: %s (%d)\n",
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note, i, TranslateError(err), err);
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result = STATUS_FAILED;
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continue;
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}
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if (printdump == JNI_TRUE) {
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printf(">>> class: \"%s\"\n", sigClass);
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printf(">>> method: \"%s%s\"\n", name, sig);
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}
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if (i < NUMBER_OF_STACK_FRAMES) {
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if (sigClass == NULL ||
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strcmp(sigClass, frames[i + offset].cls) != 0) {
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printf("(%s, frame#%d) wrong class sig: \"%s\",\n",
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note, i, sigClass);
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printf(" expected: \"%s\"\n", frames[i + offset].cls);
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result = STATUS_FAILED;
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}
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if (name == NULL ||
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strcmp(name, frames[i + offset].name) != 0) {
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printf("(%s, frame#%d) wrong method name: \"%s\",",
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note, i, name);
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printf(" expected: \"%s\"\n", frames[i + offset].name);
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result = STATUS_FAILED;
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}
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if (sig == NULL || strcmp(sig, frames[i + offset].sig) != 0) {
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printf("(%s, frame#%d) wrong method sig: \"%s\",",
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note, i, sig);
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printf(" expected: \"%s\"\n", frames[i + offset].sig);
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result = STATUS_FAILED;
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}
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}
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}
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}
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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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if (mid_checkPoint != method) {
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printf("ERROR: don't know where we get called from");
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result = STATUS_FAILED;
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return;
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}
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err = jvmti->ClearBreakpoint(mid_checkPoint, 0);
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if (err != JVMTI_ERROR_NONE) {
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printf("(ClearBreakpoint) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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return;
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}
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check(jvmti_env, thr, 0, "bp");
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err = jvmti->SetEventNotificationMode(JVMTI_ENABLE,
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JVMTI_EVENT_SINGLE_STEP, thr);
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if (err != JVMTI_ERROR_NONE) {
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printf("Cannot enable step mode: %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(">>> stepping ...\n");
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}
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}
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void JNICALL SingleStep(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thread, jmethodID method, jlocation location) {
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jvmtiError err;
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jclass klass;
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jvmtiClassDefinition classDef;
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if (wasFramePop == JNI_FALSE) {
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check(jvmti_env, thread, 1, "step");
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if (!caps.can_pop_frame) {
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printf("Pop Frame is not implemented\n");
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err = jvmti->SetEventNotificationMode(JVMTI_DISABLE,
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JVMTI_EVENT_SINGLE_STEP, thread);
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if (err != JVMTI_ERROR_NONE) {
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printf("Cannot disable step mode: %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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return;
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}
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if (printdump == JNI_TRUE) {
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printf(">>> popping frame ...\n");
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}
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err = jvmti->PopFrame(thread);
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if (err != JVMTI_ERROR_NONE) {
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printf("(PopFrame) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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return;
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}
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wasFramePop = JNI_TRUE;
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} else {
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err = jvmti->SetEventNotificationMode(JVMTI_DISABLE,
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JVMTI_EVENT_SINGLE_STEP, thread);
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if (err != JVMTI_ERROR_NONE) {
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printf("Cannot disable step mode: %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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check(jvmti_env, thread, 2, "pop");
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if (!caps.can_redefine_classes) {
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printf("Redefine Classes is not implemented\n");
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return;
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}
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if (classBytes == NULL) {
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printf("ERROR: don't have any bytes");
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result = STATUS_FAILED;
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return;
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}
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err = jvmti->GetMethodDeclaringClass(method, &klass);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetMethodDeclaringClass(bp) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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return;
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}
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if (printdump == JNI_TRUE) {
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printf(">>> redefining class ...\n");
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}
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classDef.klass = klass;
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classDef.class_byte_count =
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JNI_ENV_PTR(env)->GetArrayLength(JNI_ENV_ARG((JNIEnv *)env, classBytes));
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classDef.class_bytes = (unsigned char*)
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JNI_ENV_PTR(env)->GetByteArrayElements(JNI_ENV_ARG((JNIEnv *)env,
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classBytes), NULL);
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err = jvmti->RedefineClasses(1, &classDef);
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if (err != JVMTI_ERROR_NONE) {
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printf("(RedefineClasses) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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return;
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}
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JNI_ENV_PTR(env)->DeleteGlobalRef(JNI_ENV_ARG((JNIEnv *)env, classBytes));
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classBytes = NULL;
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check(jvmti_env, thread, 2, "swap");
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}
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}
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#ifdef STATIC_BUILD
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JNIEXPORT jint JNICALL Agent_OnLoad_getstacktr008(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_getstacktr008(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_getstacktr008(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(&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(&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(&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_generate_breakpoint_events &&
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caps.can_generate_single_step_events) {
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callbacks.Breakpoint = &Breakpoint;
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callbacks.SingleStep = &SingleStep;
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err = jvmti->SetEventCallbacks(&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 or SingleStep 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_GetStackTrace_getstacktr008_getReady(JNIEnv *env, jclass cls,
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jthread thr, jbyteArray bytes) {
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jvmtiError err;
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jclass clazz;
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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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testedThread = JNI_ENV_PTR(env)->NewGlobalRef(JNI_ENV_ARG(env, thr));
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if (!caps.can_generate_breakpoint_events ||
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!caps.can_generate_single_step_events) {
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return;
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}
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classBytes = (jbyteArray) JNI_ENV_PTR(env)->NewGlobalRef(JNI_ENV_ARG(env, bytes));
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clazz = JNI_ENV_PTR(env)->GetObjectClass(JNI_ENV_ARG(env, thr));
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if (clazz == NULL) {
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printf("Cannot get the class of thread object\n");
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result = STATUS_FAILED;
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return;
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}
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mid_checkPoint = JNI_ENV_PTR(env)->GetStaticMethodID(JNI_ENV_ARG(env, clazz),
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"checkPoint", "()V");
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if (mid_checkPoint == NULL) {
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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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mid_chain4 = JNI_ENV_PTR(env)->GetStaticMethodID(JNI_ENV_ARG(env, clazz),
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"chain4", "()V");
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if (mid_chain4 == NULL) {
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printf("Cannot find Method ID for method \"chain4\"\n");
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result = STATUS_FAILED;
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return;
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}
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err = jvmti->SetBreakpoint(mid_checkPoint, 0);
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if (err != JVMTI_ERROR_NONE) {
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printf("(SetBreakpoint) 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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err = jvmti->SetEventNotificationMode(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 void JNICALL
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Java_nsk_jvmti_GetStackTrace_getstacktr008_nativeChain(JNIEnv *env, jclass cls) {
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if (mid_chain4 != NULL) {
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JNI_ENV_PTR(env)->CallStaticVoidMethod(JNI_ENV_ARG(env, cls),
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mid_chain4);
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}
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check(jvmti, testedThread, 3, "native");
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}
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JNIEXPORT jint JNICALL
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Java_nsk_jvmti_GetStackTrace_getstacktr008_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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