517 lines
17 KiB
C
517 lines
17 KiB
C
/*
|
|
* 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 {
|
|
const char *name;
|
|
const char *sig;
|
|
jint value;
|
|
} var_info;
|
|
|
|
typedef struct {
|
|
jboolean isObsolete;
|
|
const char *name;
|
|
const char *sig;
|
|
jint line;
|
|
jint count;
|
|
var_info *vars;
|
|
} frame_info;
|
|
|
|
static jvmtiEnv *jvmti = NULL;
|
|
static jvmtiCapabilities caps;
|
|
static jvmtiEventCallbacks callbacks;
|
|
static jint result = PASSED;
|
|
static jboolean printdump = JNI_FALSE;
|
|
static jbyteArray classBytes;
|
|
static jmethodID midCheckPoint = NULL;
|
|
static jmethodID midRun = NULL;
|
|
static jint framesExpected = 0;
|
|
static jint framesCount = 0;
|
|
|
|
static const char *cls_exp = "Lnsk/jvmti/RedefineClasses/redefclass019a;";
|
|
|
|
static var_info run[] = {
|
|
{"this", "Lnsk/jvmti/RedefineClasses/redefclass019a;", 0}
|
|
};
|
|
|
|
static var_info checkPoint[] = {
|
|
{"this", "Lnsk/jvmti/RedefineClasses/redefclass019a;", 0}
|
|
};
|
|
|
|
static var_info chain1[] = {
|
|
{"this", "Lnsk/jvmti/RedefineClasses/redefclass019a;", 0},
|
|
{"localInt1", "I", 2},
|
|
{"localInt2", "I", 3333}
|
|
};
|
|
|
|
static var_info chain2[] = {
|
|
{"this", "Lnsk/jvmti/RedefineClasses/redefclass019a;", 0}
|
|
};
|
|
|
|
static var_info chain3[] = {
|
|
{"this", "Lnsk/jvmti/RedefineClasses/redefclass019a;", 0}
|
|
};
|
|
|
|
static frame_info frames[] = {
|
|
{JNI_TRUE, "checkPoint", "()V", 115, 1, checkPoint},
|
|
{JNI_FALSE, "chain3", "()V", 49, 1, chain3},
|
|
{JNI_FALSE, "chain2", "()V", 44, 1, chain2},
|
|
{JNI_FALSE, "chain1", "()V", 39, 3, chain1},
|
|
{JNI_FALSE, "run", "()V", 32, 1, run},
|
|
};
|
|
|
|
|
|
void check(jvmtiEnv *jvmti_env, jthread thr, jmethodID mid, jint i) {
|
|
jvmtiError err;
|
|
jclass cls;
|
|
jlocation loc;
|
|
char *sigClass, *name = NULL, *sig = NULL, *generic;
|
|
jboolean is_obsolete;
|
|
jvmtiLineNumberEntry *lines = NULL;
|
|
jvmtiLocalVariableEntry *table = NULL;
|
|
jint line = -1;
|
|
jint entryCount = 0;
|
|
jint varValue = -1;
|
|
jint j, k;
|
|
|
|
if (i >= (jint) (sizeof(frames)/sizeof(frame_info))) {
|
|
printf("(pop %d) too many frames\n", i);
|
|
result = STATUS_FAILED;
|
|
return;
|
|
}
|
|
|
|
err = (*jvmti_env)->GetFrameLocation(jvmti_env, thr, 0, &mid, &loc);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
printf("(GetClassSignature#%d) unexpected error: %s (%d)\n",
|
|
i, TranslateError(err), err);
|
|
result = STATUS_FAILED;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
if (sigClass == NULL || strcmp(sigClass, cls_exp) != 0) {
|
|
printf("(pop %d) wrong class sig: \"%s\",", i, sigClass);
|
|
printf(" expected: \"%s\"\n", cls_exp);
|
|
if (sigClass != NULL) {
|
|
(*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)sigClass);
|
|
}
|
|
result = STATUS_FAILED;
|
|
} else {
|
|
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;
|
|
}
|
|
|
|
err = (*jvmti_env)->IsMethodObsolete(jvmti_env, mid, &is_obsolete);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
printf("(IsMethodObsolete#%d) unexpected error: %s (%d)\n",
|
|
i, TranslateError(err), err);
|
|
result = STATUS_FAILED;
|
|
}
|
|
|
|
if (printdump == JNI_TRUE) {
|
|
printf(">>> pop %d: \"%s.%s%s\"%s\n", i, sigClass, name, sig,
|
|
(is_obsolete == JNI_TRUE) ? " (obsolete)" : "");
|
|
}
|
|
if (frames[i].isObsolete != is_obsolete) {
|
|
printf("(pop %d) %s obsolete method\n", i,
|
|
(is_obsolete == JNI_TRUE) ? "unexpected" : "should be");
|
|
result = STATUS_FAILED;
|
|
}
|
|
if (name == NULL || strcmp(name, frames[i].name) != 0) {
|
|
printf("(pop %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("(pop %d) wrong method sig: \"%s\",", i, sig);
|
|
printf(" expected: \"%s\"\n", frames[i].sig);
|
|
result = STATUS_FAILED;
|
|
}
|
|
|
|
err = (*jvmti_env)->GetLineNumberTable(jvmti_env, mid,
|
|
&entryCount, &lines);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
printf("(GetClassSignature#%d) unexpected error: %s (%d)\n",
|
|
i, TranslateError(err), err);
|
|
result = STATUS_FAILED;
|
|
}
|
|
|
|
if (lines != NULL && entryCount > 0) {
|
|
for (k = 0; k < entryCount; k++) {
|
|
if (loc < lines[k].start_location) {
|
|
break;
|
|
}
|
|
}
|
|
line = lines[k-1].line_number;
|
|
}
|
|
if (line != frames[i].line) {
|
|
printf("(pop %d) wrong line number: %d, expected: %d\n",
|
|
i, line, frames[i].line);
|
|
result = STATUS_FAILED;
|
|
}
|
|
|
|
err = (*jvmti_env)->GetLocalVariableTable(jvmti_env, mid,
|
|
&entryCount, &table);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
printf("(GetLocalVariableTable#%d) unexpected error: %s (%d)\n",
|
|
i, TranslateError(err), err);
|
|
result = STATUS_FAILED;
|
|
}
|
|
|
|
if (frames[i].count != entryCount) {
|
|
printf("(pop %d) wrong number of locals: %d, expected: %d\n",
|
|
i, entryCount, frames[i].count);
|
|
result = STATUS_FAILED;
|
|
}
|
|
|
|
if (table != NULL) {
|
|
for (k = 0; k < frames[i].count; k++) {
|
|
for (j = 0; j < entryCount; j++) {
|
|
if (strcmp(table[j].name, frames[i].vars[k].name) == 0 &&
|
|
strcmp(table[j].signature, frames[i].vars[k].sig) == 0) {
|
|
if (table[j].signature[0] == 'I') {
|
|
err = (*jvmti_env)->GetLocalInt(jvmti_env, thr, 0,
|
|
table[j].slot, &varValue);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
printf("(GetLocalInt#%d) unexpected error: %s (%d)\n",
|
|
i, TranslateError(err), err);
|
|
result = STATUS_FAILED;
|
|
}
|
|
if (printdump == JNI_TRUE) {
|
|
printf(">>> var: \"%s %s\"",
|
|
table[j].name, table[j].signature);
|
|
printf(", value: %d\n", varValue);
|
|
}
|
|
if (varValue != frames[i].vars[k].value) {
|
|
printf("(pop %d) wrong local var value: %d,",
|
|
i, varValue);
|
|
printf(" expected: %d\n", frames[i].vars[k].value);
|
|
result = STATUS_FAILED;
|
|
}
|
|
} else if (printdump == JNI_TRUE) {
|
|
printf(">>> var: \"%s %s\"\n",
|
|
table[j].name, table[j].signature);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (j == entryCount) {
|
|
printf("(pop %d) var \"%s %s\" not found\n",
|
|
i, frames[i].vars[k].name, frames[i].vars[k].sig);
|
|
result = STATUS_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 (lines != NULL) {
|
|
(*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)lines);
|
|
}
|
|
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);
|
|
}
|
|
}
|
|
|
|
void JNICALL Breakpoint(jvmtiEnv *jvmti_env, JNIEnv *env,
|
|
jthread thread, jmethodID method, jlocation location) {
|
|
jvmtiError err;
|
|
jclass klass;
|
|
jvmtiClassDefinition classDef;
|
|
|
|
if (midCheckPoint != method) {
|
|
printf("bp: don't know where we get called from\n");
|
|
result = STATUS_FAILED;
|
|
return;
|
|
}
|
|
|
|
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);
|
|
result = STATUS_FAILED;
|
|
}
|
|
|
|
err = (*jvmti_env)->GetMethodDeclaringClass(jvmti_env, method, &klass);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
printf("(GetMethodDeclaringClass) unexpected error: %s (%d)\n",
|
|
TranslateError(err), err);
|
|
result = STATUS_FAILED;
|
|
return;
|
|
}
|
|
|
|
classDef.klass = klass;
|
|
classDef.class_byte_count =
|
|
JNI_ENV_PTR(env)->GetArrayLength(JNI_ENV_ARG((JNIEnv *)env, classBytes));
|
|
classDef.class_bytes = (unsigned char *)
|
|
JNI_ENV_PTR(env)->GetByteArrayElements(JNI_ENV_ARG((JNIEnv *)env,
|
|
classBytes), NULL);
|
|
|
|
if (printdump == JNI_TRUE) {
|
|
printf(">>> about to call RedefineClasses\n");
|
|
}
|
|
|
|
err = (*jvmti_env)->RedefineClasses(jvmti_env, 1, &classDef);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
printf("(RedefineClasses) unexpected error: %s (%d)\n",
|
|
TranslateError(err), err);
|
|
result = STATUS_FAILED;
|
|
}
|
|
|
|
err = (*jvmti_env)->NotifyFramePop(jvmti_env, thread, 0);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
printf("(NotifyFramePop) unexpected error: %s (%d)\n",
|
|
TranslateError(err), err);
|
|
result = STATUS_FAILED;
|
|
}
|
|
}
|
|
|
|
void JNICALL FramePop(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread,
|
|
jmethodID method, jboolean wasPopedByException) {
|
|
jvmtiError err;
|
|
|
|
check(jvmti_env, thread, method, framesCount);
|
|
framesCount++;
|
|
if (method != midRun) {
|
|
err = (*jvmti_env)->NotifyFramePop(jvmti_env, thread, 1);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
printf("(NotifyFramePop#%d) unexpected error: %s (%d)\n",
|
|
framesCount, TranslateError(err), err);
|
|
result = STATUS_FAILED;
|
|
}
|
|
} else {
|
|
if (printdump == JNI_TRUE) {
|
|
printf(">>> poped %d frames till method \"run()\"\n",
|
|
framesCount);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef STATIC_BUILD
|
|
JNIEXPORT jint JNICALL Agent_OnLoad_redefclass019(JavaVM *jvm, char *options, void *reserved) {
|
|
return Agent_Initialize(jvm, options, reserved);
|
|
}
|
|
JNIEXPORT jint JNICALL Agent_OnAttach_redefclass019(JavaVM *jvm, char *options, void *reserved) {
|
|
return Agent_Initialize(jvm, options, reserved);
|
|
}
|
|
JNIEXPORT jint JNI_OnLoad_redefclass019(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_redefine_classes) {
|
|
printf("Warning: RedefineClasses is not implemented\n");
|
|
}
|
|
|
|
if (!caps.can_get_line_numbers) {
|
|
printf("Warning: GetLineNumberTable is not implemented\n");
|
|
}
|
|
|
|
if (!caps.can_access_local_variables) {
|
|
printf("Warning: access to local variables is not implemented\n");
|
|
}
|
|
|
|
if (caps.can_generate_breakpoint_events &&
|
|
caps.can_generate_frame_pop_events) {
|
|
callbacks.Breakpoint = &Breakpoint;
|
|
callbacks.FramePop = &FramePop;
|
|
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 void JNICALL
|
|
Java_nsk_jvmti_RedefineClasses_redefclass019_getReady(JNIEnv *env, jclass cls,
|
|
jclass clazz, jbyteArray bytes, jint depth) {
|
|
jvmtiError err;
|
|
|
|
if (jvmti == NULL) {
|
|
printf("JVMTI client was not properly loaded!\n");
|
|
result = STATUS_FAILED;
|
|
return;
|
|
}
|
|
|
|
if (!caps.can_redefine_classes ||
|
|
!caps.can_generate_breakpoint_events ||
|
|
!caps.can_generate_frame_pop_events ||
|
|
!caps.can_get_line_numbers ||
|
|
!caps.can_access_local_variables) return;
|
|
|
|
classBytes = JNI_ENV_PTR(env)->NewGlobalRef(JNI_ENV_ARG(env, bytes));
|
|
|
|
midRun = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, clazz),
|
|
"run", "()V");
|
|
if (midRun == NULL) {
|
|
printf("Cannot find Method ID for method run\n");
|
|
result = STATUS_FAILED;
|
|
return;
|
|
}
|
|
|
|
midCheckPoint = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, clazz),
|
|
"checkPoint", "()V");
|
|
if (midCheckPoint == NULL) {
|
|
printf("Cannot find Method ID for method checkPoint\n");
|
|
result = STATUS_FAILED;
|
|
return;
|
|
}
|
|
|
|
err = (*jvmti)->SetBreakpoint(jvmti, midCheckPoint, 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;
|
|
return;
|
|
}
|
|
|
|
err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE,
|
|
JVMTI_EVENT_FRAME_POP, NULL);
|
|
if (err != JVMTI_ERROR_NONE) {
|
|
printf("Failed to enable FRAME_POP event: %s (%d)\n",
|
|
TranslateError(err), err);
|
|
result = STATUS_FAILED;
|
|
} else {
|
|
framesExpected = depth;
|
|
}
|
|
}
|
|
|
|
JNIEXPORT jint JNICALL
|
|
Java_nsk_jvmti_RedefineClasses_redefclass019_check(JNIEnv *env, jclass cls) {
|
|
if (framesCount != framesExpected) {
|
|
printf("Wrong number of frames: %d, expected: %d\n",
|
|
framesCount, framesExpected);
|
|
result = STATUS_FAILED;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|