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j7vmi.c
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/*******************************************************************************
* Copyright IBM Corp. and others 2002
*
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which accompanies this
* distribution and is available at https://www.eclipse.org/legal/epl-2.0/
* or the Apache License, Version 2.0 which accompanies this distribution and
* is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* This Source Code may also be made available under the following
* Secondary Licenses when the conditions for such availability set
* forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
* General Public License, version 2 with the GNU Classpath
* Exception [1] and GNU General Public License, version 2 with the
* OpenJDK Assembly Exception [2].
*
* [1] https://www.gnu.org/software/classpath/license.html
* [2] https://openjdk.org/legal/assembly-exception.html
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0 OR GPL-2.0-only WITH OpenJDK-assembly-exception-1.0
*******************************************************************************/
/**
* @brief This file contains implementations of the public JVM interface (JVM_ functions)
* which simply forward to a concrete implementation located either in the JCL library
* or proxy forwarder.
*/
#include <stdlib.h>
#include <assert.h>
#include "j9consts.h"
#include "jclprots.h"
#include "j9protos.h"
#include "j9.h"
#include "omrgcconsts.h"
#include "j9modifiers_api.h"
#include "j9vm_internal.h"
#include "j9vmconstantpool.h"
#include "rommeth.h"
#include "sunvmi_api.h"
#include "util_api.h"
/* TODO need to determine why j9vmnls.h is not sufficient */
#include "j9jclnls.h"
#include "ut_j9scar.h"
#include "j9vmnls.h"
extern void initializeVMI(void);
#define POK_BOOLEAN 4
#define POK_CHAR 5
#define POK_FLOAT 6
#define POK_DOUBLE 7
#define POK_BYTE 8
#define POK_SHORT 9
#define POK_INT 10
#define POK_LONG 11
static J9ThreadEnv*
getJ9ThreadEnv(JNIEnv* env)
{
JavaVM* jniVM = NULL;
static J9ThreadEnv* threadEnv = NULL;
if (NULL != threadEnv) {
return threadEnv;
}
/* Get the thread functions */
(*env)->GetJavaVM(env, &jniVM);
(*jniVM)->GetEnv(jniVM, (void**)&threadEnv, J9THREAD_VERSION_1_1);
return threadEnv;
}
/**
* Copies the contents of <code>array1</code> starting at offset <code>start1</code>
* into <code>array2</code> starting at offset <code>start2</code> for
* <code>length</code> elements.
*
* @param array1 the array to copy out of
* @param start1 the starting index in array1
* @param array2 the array to copy into
* @param start2 the starting index in array2
* @param length the number of elements in the array to copy
*/
void JNICALL
JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, jobject dst, jint dst_pos, jint length)
{
J9VMThread *currentThread = NULL;
J9JavaVM *vm = NULL;
J9InternalVMFunctions *vmFuncs = NULL;
Assert_SC_notNull(env);
currentThread = (J9VMThread *) env;
vm = currentThread->javaVM;
vmFuncs = vm->internalVMFunctions;
vmFuncs->internalEnterVMFromJNI(currentThread);
if ((NULL == src) || (NULL == dst)) {
vmFuncs->setCurrentException(currentThread, J9VMCONSTANTPOOL_JAVALANGNULLPOINTEREXCEPTION, NULL);
} else {
j9object_t srcArray = J9_JNI_UNWRAP_REFERENCE(src);
j9object_t dstArray = J9_JNI_UNWRAP_REFERENCE(dst);
J9ArrayClass *srcArrayClass = (J9ArrayClass *) J9OBJECT_CLAZZ(currentThread, srcArray);
J9ArrayClass *dstArrayClass = (J9ArrayClass *) J9OBJECT_CLAZZ(currentThread, dstArray);
if (J9CLASS_IS_ARRAY(srcArrayClass) && J9CLASS_IS_ARRAY(dstArrayClass)) {
if ((src_pos < 0) || (dst_pos < 0) || (length < 0)
|| (((jint) J9INDEXABLEOBJECT_SIZE(currentThread, srcArray)) < (src_pos + length))
|| (((jint) J9INDEXABLEOBJECT_SIZE(currentThread, dstArray)) < (dst_pos + length))) {
vmFuncs->setCurrentException(currentThread, J9VMCONSTANTPOOL_JAVALANGARRAYINDEXOUTOFBOUNDSEXCEPTION, NULL);
} else {
J9Class *srcTypeOfArray = srcArrayClass->componentType;
J9Class *dstTypeOfArray = dstArrayClass->componentType;
int i = 0;
if (J9ROMCLASS_IS_PRIMITIVE_TYPE(srcTypeOfArray->romClass) && J9ROMCLASS_IS_PRIMITIVE_TYPE(dstTypeOfArray->romClass)) {
if (srcTypeOfArray == dstTypeOfArray) {
if (vm->longReflectClass == srcTypeOfArray) {
if ((srcArray == dstArray) && (((src_pos < dst_pos) && (src_pos + length > dst_pos)))) {
for (i = length - 1; i >= 0; i--) {
J9JAVAARRAYOFLONG_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFLONG_LOAD(currentThread, srcArray, i + src_pos));
}
} else {
for (i = 0; i < length; i++) {
J9JAVAARRAYOFLONG_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFLONG_LOAD(currentThread, srcArray, i + src_pos));
}
}
} else if (vm->booleanReflectClass == srcTypeOfArray) {
if ((srcArray == dstArray) && (((src_pos < dst_pos) && (src_pos + length > dst_pos)))) {
for (i = length - 1; i >= 0; i--) {
J9JAVAARRAYOFBOOLEAN_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFBOOLEAN_LOAD(currentThread, srcArray, i + src_pos));
}
} else {
for (i = 0; i < length; i++) {
J9JAVAARRAYOFBOOLEAN_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFBOOLEAN_LOAD(currentThread, srcArray, i + src_pos));
}
}
} else if (vm->byteReflectClass == srcTypeOfArray) {
if ((srcArray == dstArray) && (((src_pos < dst_pos) && (src_pos + length > dst_pos)))) {
for (i = length - 1; i >= 0; i--) {
J9JAVAARRAYOFBYTE_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFBYTE_LOAD(currentThread, srcArray, i + src_pos));
}
} else {
for (i = 0; i < length; i++) {
J9JAVAARRAYOFBYTE_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFBYTE_LOAD(currentThread, srcArray, i + src_pos));
}
}
} else if (vm->charReflectClass == srcTypeOfArray) {
if ((srcArray == dstArray) && (((src_pos < dst_pos) && (src_pos + length > dst_pos)))) {
for (i = length - 1; i >= 0; i--) {
J9JAVAARRAYOFCHAR_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFCHAR_LOAD(currentThread, srcArray, i + src_pos));
}
} else {
for (i = 0; i < length; i++) {
J9JAVAARRAYOFCHAR_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFCHAR_LOAD(currentThread, srcArray, i + src_pos));
}
}
} else if (vm->shortReflectClass == srcTypeOfArray) {
if ((srcArray == dstArray) && (((src_pos < dst_pos) && (src_pos + length > dst_pos)))) {
for (i = length - 1; i >= 0; i--) {
J9JAVAARRAYOFSHORT_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFSHORT_LOAD(currentThread, srcArray, i + src_pos));
}
} else {
for (i = 0; i < length; i++) {
J9JAVAARRAYOFSHORT_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFSHORT_LOAD(currentThread, srcArray, i + src_pos));
}
}
} else if (vm->intReflectClass == srcTypeOfArray) {
if ((srcArray == dstArray) && (((src_pos < dst_pos) && (src_pos + length > dst_pos)))) {
for (i = length - 1; i >= 0; i--) {
J9JAVAARRAYOFINT_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFINT_LOAD(currentThread, srcArray, i + src_pos));
}
} else {
for (i = 0; i < length; i++) {
J9JAVAARRAYOFINT_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFINT_LOAD(currentThread, srcArray, i + src_pos));
}
}
} else if (vm->floatReflectClass == srcTypeOfArray) {
if ((srcArray == dstArray) && (((src_pos < dst_pos) && (src_pos + length > dst_pos)))) {
for (i = length - 1; i >= 0; i--) {
J9JAVAARRAYOFFLOAT_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFFLOAT_LOAD(currentThread, srcArray, i + src_pos));
}
} else {
for (i = 0; i < length; i++) {
J9JAVAARRAYOFFLOAT_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFFLOAT_LOAD(currentThread, srcArray, i + src_pos));
}
}
} else if (vm->doubleReflectClass == srcTypeOfArray) {
if ((srcArray == dstArray) && (((src_pos < dst_pos) && (src_pos + length > dst_pos)))) {
for (i = length - 1; i >= 0; i--) {
J9JAVAARRAYOFDOUBLE_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFDOUBLE_LOAD(currentThread, srcArray, i + src_pos));
}
} else {
for (i = 0; i < length; i++) {
J9JAVAARRAYOFDOUBLE_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFDOUBLE_LOAD(currentThread, srcArray, i + src_pos));
}
}
} else {
vmFuncs->setCurrentException(currentThread, J9VMCONSTANTPOOL_JAVALANGILLEGALARGUMENTEXCEPTION, NULL);
}
} else {
vmFuncs->setCurrentException(currentThread, J9VMCONSTANTPOOL_JAVALANGARRAYSTOREEXCEPTION, NULL);
}
} else if (!J9ROMCLASS_IS_PRIMITIVE_TYPE(srcTypeOfArray->romClass) && !J9ROMCLASS_IS_PRIMITIVE_TYPE(dstTypeOfArray->romClass)) {
if (srcArray == dstArray) {
if ((((src_pos < dst_pos) && (src_pos + length > dst_pos)))) {
for (i = length - 1; i >= 0; i--) {
J9JAVAARRAYOFOBJECT_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFOBJECT_LOAD(currentThread, srcArray, i + src_pos));
}
} else {
for (i = 0; i < length; i++) {
J9JAVAARRAYOFOBJECT_STORE(currentThread, dstArray, i + dst_pos, J9JAVAARRAYOFOBJECT_LOAD(currentThread, srcArray, i + src_pos));
}
}
} else {
j9object_t srcObject = NULL;
J9Class *srcObjectClass = NULL;
for (i = 0; i < length; i++) {
srcObject = J9JAVAARRAYOFOBJECT_LOAD(currentThread, srcArray, i + src_pos);
if (NULL == srcObject) {
J9JAVAARRAYOFOBJECT_STORE(currentThread, dstArray, i + dst_pos, srcObject);
} else {
srcObjectClass = J9OBJECT_CLAZZ(currentThread, srcObject);
if (isSameOrSuperClassOf (dstTypeOfArray, srcObjectClass)) {
J9JAVAARRAYOFOBJECT_STORE(currentThread, dstArray, i + dst_pos, srcObject);
} else {
vmFuncs->setCurrentException(currentThread, J9VMCONSTANTPOOL_JAVALANGARRAYSTOREEXCEPTION, NULL);
break;
}
}
}
}
} else {
vmFuncs->setCurrentException(currentThread, J9VMCONSTANTPOOL_JAVALANGARRAYSTOREEXCEPTION, NULL);
}
}
} else {
vmFuncs->setCurrentException(currentThread, J9VMCONSTANTPOOL_JAVALANGARRAYSTOREEXCEPTION, NULL);
}
}
vmFuncs->internalExitVMToJNI(currentThread);
}
jobject JNICALL
JVM_AssertionStatusDirectives(jint arg0, jint arg1)
{
assert(!"JVM_AssertionStatusDirectives() stubbed!");
return NULL;
}
jobject JNICALL
JVM_Clone(jint arg0, jint arg1)
{
assert(!"JVM_Clone() stubbed!");
return NULL;
}
jobject JNICALL
JVM_CompileClass(jint arg0, jint arg1, jint arg2)
{
assert(!"JVM_CompileClass() stubbed!");
return NULL;
}
jobject JNICALL
JVM_CompileClasses(jint arg0, jint arg1, jint arg2)
{
assert(!"JVM_CompileClasses() stubbed!");
return NULL;
}
jobject JNICALL
JVM_CompilerCommand(jint arg0, jint arg1, jint arg2)
{
assert(!"JVM_CompilerCommand() stubbed!");
return NULL;
}
jobject JNICALL
JVM_CountStackFrames(jint arg0, jint arg1)
{
assert(!"JVM_CountStackFrames() stubbed!");
return NULL;
}
jobject JNICALL
JVM_CurrentThread(JNIEnv* env, jclass java_lang_Thread)
{
J9VMThread* vmThread = (J9VMThread*)env;
if (NULL == vmThread->threadObject) {
return NULL;
} else {
return (jobject)(&vmThread->threadObject);
}
}
jboolean JNICALL
JVM_DesiredAssertionStatus(JNIEnv* env, jobject arg1, jobject arg2)
{
return JNI_FALSE;
}
jobject JNICALL
JVM_DisableCompiler(jint arg0, jint arg1)
{
assert(!"JVM_DisableCompiler() stubbed!");
return NULL;
}
#if (JAVA_SPEC_VERSION == 8) && defined(WIN32)
/* Do not remove: this method is required by Windows IBM Java 8 builds. */
static jclass
java_lang_J9VMInternals(JNIEnv* env)
{
static jclass cached = NULL;
jclass localRef = NULL;
if (NULL != cached) {
return cached;
}
localRef = (*env)->FindClass(env, "java/lang/J9VMInternals");
assert(localRef != NULL);
cached = (*env)->NewGlobalRef(env, localRef);
if (cached == NULL) {
return NULL;
}
(*env)->DeleteLocalRef(env,localRef);
assert(localRef != NULL);
return cached;
}
/* Do not remove: this method is required by Windows IBM Java 8 builds. */
static jmethodID
java_lang_J9VMInternals_doPrivileged(JNIEnv* env)
{
static jmethodID cached = NULL;
if (NULL != cached) {
return cached;
}
cached = (*env)->GetStaticMethodID(env, java_lang_J9VMInternals(env), "doPrivileged", "(Ljava/security/PrivilegedAction;)Ljava/lang/Object;" );
assert(cached != NULL);
return cached;
}
/* Do not remove: this method is required by Windows IBM Java 8 builds. */
static jmethodID
java_lang_J9VMInternals_doPrivilegedWithException(JNIEnv* env)
{
static jmethodID cached = NULL;
if (NULL != cached) {
return cached;
}
cached = (*env)->GetStaticMethodID(env, java_lang_J9VMInternals(env), "doPrivileged", "(Ljava/security/PrivilegedExceptionAction;)Ljava/lang/Object;" );
assert(cached != NULL);
return cached;
}
/* Do not remove: this method is required by Windows IBM Java 8 builds. */
jobject JNICALL
JVM_DoPrivileged(JNIEnv* env, jobject java_security_AccessController, jobject action, jboolean unknown, jboolean isExceptionAction)
{
PORT_ACCESS_FROM_ENV(env);
#if 0
j9tty_printf(
PORTLIB,
"JVM_DoPrivileged(env=0x%p, accessController=0x%p, action=0x%p, arg3=0x%p, arg4=0x%p\n",
env, java_security_AccessController, action, arg3, arg4);
#endif
jmethodID methodID =
(JNI_TRUE == isExceptionAction)
? java_lang_J9VMInternals_doPrivilegedWithException(env)
: java_lang_J9VMInternals_doPrivileged(env);
return (*env)->CallStaticObjectMethod(
env,
java_lang_J9VMInternals(env),
methodID,
action);
}
#endif /* (JAVA_SPEC_VERSION == 8) && defined(WIN32) */
jobject JNICALL
JVM_EnableCompiler(jint arg0, jint arg1)
{
assert(!"JVM_EnableCompiler() stubbed!");
return NULL;
}
void JNICALL
JVM_FillInStackTrace(JNIEnv* env, jobject throwable)
{
J9VMThread* currentThread = (J9VMThread*) env;
J9JavaVM* javaVM = currentThread->javaVM;
J9InternalVMFunctions* vmfns = javaVM->internalVMFunctions;
j9object_t unwrappedThrowable = NULL;
vmfns->internalEnterVMFromJNI(currentThread);
unwrappedThrowable = J9_JNI_UNWRAP_REFERENCE(throwable);
if ((0 == (javaVM->runtimeFlags & J9_RUNTIME_OMIT_STACK_TRACES)) &&
/* If the disableWritableStackTrace field is true, do not create the stack trace. */
!J9VMJAVALANGTHROWABLE_DISABLEWRITABLESTACKTRACE(currentThread, unwrappedThrowable))
{
UDATA flags = J9_STACKWALK_CACHE_PCS | J9_STACKWALK_WALK_TRANSLATE_PC | J9_STACKWALK_VISIBLE_ONLY | J9_STACKWALK_INCLUDE_NATIVES | J9_STACKWALK_SKIP_INLINES;
J9StackWalkState* walkState = currentThread->stackWalkState;
j9object_t result = (j9object_t) J9VMJAVALANGTHROWABLE_WALKBACK(currentThread, unwrappedThrowable);
UDATA rc = 0;
UDATA i = 0;
UDATA framesWalked = 0;
/* Do not hide exception frames if fillInStackTrace is called on an exception which already has a stack trace. In the out of memory case,
* there is a bit indicating that we should explicitly override this behaviour, since we've precached the stack trace array. */
if ((NULL == result) || (J9_PRIVATE_FLAGS_FILL_EXISTING_TRACE == (currentThread->privateFlags & J9_PRIVATE_FLAGS_FILL_EXISTING_TRACE))) {
flags |= J9_STACKWALK_HIDE_EXCEPTION_FRAMES;
walkState->restartException = unwrappedThrowable;
}
walkState->skipCount = 1; /* skip the INL frame -- TODO revisit this */
#if JAVA_SPEC_VERSION >= 15
{
J9Class *receiverClass = J9OBJECT_CLAZZ(currentThread, unwrappedThrowable);
if (J9VMJAVALANGNULLPOINTEREXCEPTION_OR_NULL(javaVM) == receiverClass) {
walkState->skipCount = 2; /* skip the INL & NullPointerException.fillInStackTrace() frames */
}
}
#endif /* JAVA_SPEC_VERSION >= 15 */
walkState->walkThread = currentThread;
walkState->flags = flags;
rc = javaVM->walkStackFrames(currentThread, walkState);
if (J9_STACKWALK_RC_NONE != rc) {
/* Avoid infinite recursion if already throwing OOM. */
if (J9_PRIVATE_FLAGS_OUT_OF_MEMORY == (currentThread->privateFlags & J9_PRIVATE_FLAGS_OUT_OF_MEMORY)) {
goto setThrowableSlots;
}
vmfns->setNativeOutOfMemoryError(currentThread, J9NLS_JCL_FAILED_TO_CREATE_STACK_TRACE); /* TODO replace with local NLS message */
goto done;
}
framesWalked = walkState->framesWalked;
/* If there is no stack trace in the exception, or we are not in the out of memory case, allocate a new stack trace. */
if ((NULL == result) || (0 == (currentThread->privateFlags & J9_PRIVATE_FLAGS_FILL_EXISTING_TRACE))) {
#ifdef J9VM_ENV_DATA64
J9Class* arrayClass = javaVM->longArrayClass;
#else
J9Class* arrayClass = javaVM->intArrayClass;
#endif
result = javaVM->memoryManagerFunctions->J9AllocateIndexableObject(currentThread, arrayClass, (U_32)framesWalked, J9_GC_ALLOCATE_OBJECT_NON_INSTRUMENTABLE);
if (NULL == result) {
vmfns->setHeapOutOfMemoryError(currentThread);
goto done;
}
/* Reload after allocation */
unwrappedThrowable = J9_JNI_UNWRAP_REFERENCE(throwable);
} else {
UDATA maxSize = J9INDEXABLEOBJECT_SIZE(currentThread, result);
if (framesWalked > maxSize) {
framesWalked = maxSize;
}
}
for (i = 0; i < framesWalked; ++i) {
J9JAVAARRAYOFUDATA_STORE(currentThread, result, i, walkState->cache[i]);
}
vmfns->freeStackWalkCaches(currentThread, walkState);
setThrowableSlots:
J9VMJAVALANGTHROWABLE_SET_WALKBACK(currentThread, unwrappedThrowable, result);
J9VMJAVALANGTHROWABLE_SET_STACKTRACE(currentThread, unwrappedThrowable, NULL);
}
done:
vmfns->internalExitVMToJNI(currentThread);
}
/**
* Find the specified class in given class loader
*
* @param env
* @param className null-terminated class name string.
* @param init initialize the class when set
* @param classLoader classloader of the class
* @param throwError set to true in order to throw errors
* @return Assumed to be a jclass.
*
* Note: this call is implemented from info provided via CMVC 154874.
*/
jobject JNICALL
JVM_FindClassFromClassLoader(JNIEnv* env, char* className, jboolean init, jobject classLoader, jboolean throwError)
{
ENSURE_VMI();
return g_VMI->JVM_FindClassFromClassLoader(env, className, init, classLoader, throwError);
}
/**
* Find the specified class using boot class loader
*
* @param env
* @param className null-terminated class name string.
* @return jclass or NULL on error.
*
* Note: this call is implemented from info provided via CMVC 156938.
*/
jobject JNICALL
JVM_FindClassFromBootLoader(JNIEnv* env, char* className)
{
return JVM_FindClassFromClassLoader(env, className, JNI_TRUE, NULL, JNI_FALSE);
}
jobject JNICALL
JVM_FindLoadedClass(JNIEnv* env, jobject classLoader, jobject className)
{
J9VMThread* currentThread = (J9VMThread*) env;
J9JavaVM* vm = currentThread->javaVM;
J9ClassLoader* vmClassLoader;
J9Class* loadedClass = NULL;
vm->internalVMFunctions->internalEnterVMFromJNI(currentThread);
if (NULL == className) {
goto done;
}
vmClassLoader = J9VMJAVALANGCLASSLOADER_VMREF(currentThread, J9_JNI_UNWRAP_REFERENCE(classLoader));
if (NULL == vmClassLoader) {
goto done;
}
loadedClass = vm->internalVMFunctions->internalFindClassString(
currentThread,
NULL,
J9_JNI_UNWRAP_REFERENCE(className),
vmClassLoader,
J9_FINDCLASS_FLAG_EXISTING_ONLY,
CLASSNAME_INVALID);
done:
vm->internalVMFunctions->internalExitVMToJNI(currentThread);
if (NULL == loadedClass) {
return NULL;
}
return (jobject)(&loadedClass->classObject);
}
jobject JNICALL
JVM_FindPrimitiveClass(JNIEnv* env, char* name)
{
J9JavaVM* vm = ((J9VMThread*)env)->javaVM;
/* code inspired by reflecthelp.c */
if (0 == strcmp(name,"int")) {
return (jobject)(&vm->intReflectClass->classObject);
}
if (0 == strcmp(name,"boolean")) {
return (jobject)(&vm->booleanReflectClass->classObject);
}
if (0 == strcmp(name,"long")) {
return (jobject)(&vm->longReflectClass->classObject);
}
if (0 == strcmp(name,"double")) {
return (jobject)(&vm->doubleReflectClass->classObject);
}
if (0 == strcmp(name,"float")) {
return (jobject)(&vm->floatReflectClass->classObject);
}
if (0 == strcmp(name,"char")) {
return (jobject)(&vm->charReflectClass->classObject);
}
if (0 == strcmp(name,"byte")) {
return (jobject)(&vm->byteReflectClass->classObject);
}
if (0 == strcmp(name,"short")) {
return (jobject)(&vm->shortReflectClass->classObject);
}
if (0 == strcmp(name,"void")) {
return (jobject)(&vm->voidReflectClass->classObject);
}
assert(!"JVM_FindPrimitiveClass() stubbed!");
return NULL;
}
/**
* Get the Array element at the index
* This function may lock, gc or throw exception.
* @param array The array
* @param index The index
* @return the element at the index
*/
jobject JNICALL
JVM_GetArrayElement(JNIEnv *env, jobject array, jint index)
{
J9VMThread *currentThread = NULL;
J9JavaVM *vm = NULL;
J9InternalVMFunctions *vmFuncs = NULL;
jobject elementJNIRef = NULL;
Assert_SC_notNull(env);
currentThread = (J9VMThread *) env;
vm = currentThread->javaVM;
vmFuncs = vm->internalVMFunctions;
vmFuncs->internalEnterVMFromJNI(currentThread);
if (NULL == array) {
vmFuncs->setCurrentException(currentThread, J9VMCONSTANTPOOL_JAVALANGNULLPOINTEREXCEPTION, NULL);
} else {
j9object_t j9array = J9_JNI_UNWRAP_REFERENCE(array);
J9ArrayClass *arrayClass = (J9ArrayClass *) J9OBJECT_CLAZZ(currentThread, j9array);
J9Class *typeOfArray = arrayClass->componentType;
if (J9CLASS_IS_ARRAY(arrayClass)) {
if ((index < 0) || (((jint) J9INDEXABLEOBJECT_SIZE(currentThread, j9array)) <= index)) {
vmFuncs->setCurrentException(currentThread, J9VMCONSTANTPOOL_JAVALANGARRAYINDEXOUTOFBOUNDSEXCEPTION, NULL);
} else {
if (J9ROMCLASS_IS_PRIMITIVE_TYPE(typeOfArray->romClass)) {
j9object_t primitiveElement = NULL;
J9MemoryManagerFunctions *memManagerFuncs = vm->memoryManagerFunctions;
BOOLEAN illegalArgSeen = FALSE;
if (vm->longReflectClass == typeOfArray) {
primitiveElement = memManagerFuncs->J9AllocateObject(currentThread, J9VMJAVALANGLONG_OR_NULL(vm), J9_GC_ALLOCATE_OBJECT_NON_INSTRUMENTABLE);
if (NULL != primitiveElement) {
jlong val = J9JAVAARRAYOFLONG_LOAD(currentThread, j9array, index);
J9VMJAVALANGLONG_SET_VALUE(currentThread, primitiveElement, val);
elementJNIRef = vmFuncs->j9jni_createLocalRef((JNIEnv *)currentThread, primitiveElement);
}
} else if (vm->booleanReflectClass == typeOfArray) {
primitiveElement = memManagerFuncs->J9AllocateObject(currentThread, J9VMJAVALANGBOOLEAN_OR_NULL(vm), J9_GC_ALLOCATE_OBJECT_NON_INSTRUMENTABLE);
if (NULL != primitiveElement) {
jboolean val = J9JAVAARRAYOFBOOLEAN_LOAD(currentThread, j9array, index);
J9VMJAVALANGBOOLEAN_SET_VALUE(currentThread, primitiveElement, val);
elementJNIRef = vmFuncs->j9jni_createLocalRef((JNIEnv *) currentThread, primitiveElement);
}
} else if (vm->byteReflectClass == typeOfArray) {
primitiveElement = memManagerFuncs->J9AllocateObject(currentThread, J9VMJAVALANGBYTE_OR_NULL(vm), J9_GC_ALLOCATE_OBJECT_NON_INSTRUMENTABLE);
if (NULL != primitiveElement) {
jbyte val = J9JAVAARRAYOFBYTE_LOAD(currentThread, j9array, index);
J9VMJAVALANGBYTE_SET_VALUE(currentThread, primitiveElement, val);
elementJNIRef = vmFuncs->j9jni_createLocalRef((JNIEnv *) currentThread, primitiveElement);
}
} else if (vm->charReflectClass == typeOfArray) {
primitiveElement = memManagerFuncs->J9AllocateObject(currentThread, J9VMJAVALANGCHARACTER_OR_NULL(vm), J9_GC_ALLOCATE_OBJECT_NON_INSTRUMENTABLE);
if (NULL != primitiveElement) {
jchar val = J9JAVAARRAYOFCHAR_LOAD(currentThread, j9array, index);
J9VMJAVALANGCHARACTER_SET_VALUE(currentThread, primitiveElement, val);
elementJNIRef = vmFuncs->j9jni_createLocalRef((JNIEnv *) currentThread, primitiveElement);
}
} else if (vm->shortReflectClass == typeOfArray) {
primitiveElement = memManagerFuncs->J9AllocateObject(currentThread, J9VMJAVALANGSHORT_OR_NULL(vm), J9_GC_ALLOCATE_OBJECT_NON_INSTRUMENTABLE);
if (NULL != primitiveElement) {
jshort val = J9JAVAARRAYOFSHORT_LOAD(currentThread, j9array, index);
J9VMJAVALANGSHORT_SET_VALUE(currentThread, primitiveElement, val);
elementJNIRef = vmFuncs->j9jni_createLocalRef((JNIEnv *) currentThread, primitiveElement);
}
} else if (vm->intReflectClass == typeOfArray) {
primitiveElement = memManagerFuncs->J9AllocateObject(currentThread, J9VMJAVALANGINTEGER_OR_NULL(vm), J9_GC_ALLOCATE_OBJECT_NON_INSTRUMENTABLE);
if (NULL != primitiveElement) {
jint val = J9JAVAARRAYOFINT_LOAD(currentThread, j9array, index);
J9VMJAVALANGINTEGER_SET_VALUE(currentThread, primitiveElement, val);
elementJNIRef = vmFuncs->j9jni_createLocalRef((JNIEnv *) currentThread, primitiveElement);
}
} else if (vm->floatReflectClass == typeOfArray) {
primitiveElement = memManagerFuncs->J9AllocateObject(currentThread, J9VMJAVALANGFLOAT_OR_NULL(vm), J9_GC_ALLOCATE_OBJECT_NON_INSTRUMENTABLE);
if (NULL != primitiveElement) {
U_32 val = J9JAVAARRAYOFFLOAT_LOAD(currentThread, j9array, index);
J9VMJAVALANGFLOAT_SET_VALUE(currentThread, primitiveElement, val);
elementJNIRef = vmFuncs->j9jni_createLocalRef((JNIEnv *) currentThread, primitiveElement);
}
} else if (vm->doubleReflectClass == typeOfArray) {
primitiveElement = memManagerFuncs->J9AllocateObject(currentThread, J9VMJAVALANGDOUBLE_OR_NULL(vm), J9_GC_ALLOCATE_OBJECT_NON_INSTRUMENTABLE);
if (NULL != primitiveElement) {
U_64 val = J9JAVAARRAYOFDOUBLE_LOAD(currentThread, j9array, index);
J9VMJAVALANGDOUBLE_SET_VALUE(currentThread, primitiveElement, val);
elementJNIRef = vmFuncs->j9jni_createLocalRef((JNIEnv *) currentThread, primitiveElement);
}
} else {
vmFuncs->setCurrentException(currentThread, J9VMCONSTANTPOOL_JAVALANGILLEGALARGUMENTEXCEPTION, NULL);
illegalArgSeen = TRUE;
}
if (!illegalArgSeen) {
if (NULL == primitiveElement) {
vmFuncs->setHeapOutOfMemoryError(currentThread);
} else if (NULL == elementJNIRef) {
vmFuncs->setNativeOutOfMemoryError(currentThread, J9NLS_VM_NATIVE_OOM);
}
}
} else {
j9object_t j9arrayElement = J9JAVAARRAYOFOBJECT_LOAD(currentThread, j9array, index);
elementJNIRef = vmFuncs->j9jni_createLocalRef((JNIEnv *)currentThread, j9arrayElement);
if ((NULL == elementJNIRef) && (NULL != j9arrayElement)) {
vmFuncs->setNativeOutOfMemoryError(currentThread, J9NLS_VM_NATIVE_OOM);
}
}
}
} else {
vmFuncs->setCurrentException(currentThread, J9VMCONSTANTPOOL_JAVALANGILLEGALARGUMENTEXCEPTION, NULL);
}
}
vmFuncs->internalExitVMToJNI(currentThread);
return elementJNIRef;
}
/**
* Get the array length.
* This function may lock, gc or throw exception.
* @param array The array
* @return the array length
*/
jint JNICALL
JVM_GetArrayLength(JNIEnv *env, jobject array)
{
J9VMThread *currentThread = NULL;
J9JavaVM *vm = NULL;
J9InternalVMFunctions *vmFuncs = NULL;
jsize arrayLength = 0;
Assert_SC_notNull(env);
currentThread = (J9VMThread*) env;
vm = currentThread->javaVM;
vmFuncs = vm->internalVMFunctions;
vmFuncs->internalEnterVMFromJNI(currentThread);
if (NULL == array) {
vmFuncs->setCurrentException(currentThread, J9VMCONSTANTPOOL_JAVALANGNULLPOINTEREXCEPTION, NULL);
} else {
J9Class *ramClass = NULL;
j9object_t j9array = NULL;
j9array = J9_JNI_UNWRAP_REFERENCE(array);
ramClass = J9OBJECT_CLAZZ(currentThread, j9array);
if (J9CLASS_IS_ARRAY(ramClass)) {
arrayLength = J9INDEXABLEOBJECT_SIZE(currentThread, j9array);
} else {
vmFuncs->setCurrentException(currentThread, J9VMCONSTANTPOOL_JAVALANGILLEGALARGUMENTEXCEPTION, NULL);
}
}
vmFuncs->internalExitVMToJNI(currentThread);
return arrayLength;
}
J9Class*
java_lang_Class_vmRef(JNIEnv* env, jobject clazz)
{
J9VMThread* currentThread = (J9VMThread*) env;
J9JavaVM* vm = currentThread->javaVM;
J9Class* ramClass = NULL;
vm->internalVMFunctions->internalEnterVMFromJNI(currentThread);
ramClass = J9VMJAVALANGCLASS_VMREF(currentThread, J9_JNI_UNWRAP_REFERENCE(clazz));
vm->internalVMFunctions->internalExitVMToJNI(currentThread);
return ramClass;
}
/**
* Helper function to convert a J9UTF8* to a null-terminated C string.
*/
static char*
utf8_to_cstring(JNIEnv* env, J9UTF8* utf)
{
PORT_ACCESS_FROM_ENV(env);
char* cstring = (char*)j9mem_allocate_memory(J9UTF8_LENGTH(utf) + 1, OMRMEM_CATEGORY_VM);
if (NULL != cstring) {
memcpy(cstring, J9UTF8_DATA(utf), J9UTF8_LENGTH(utf));
cstring[J9UTF8_LENGTH(utf)] = 0;
}
return cstring;
}
/**
* Helper function to convert a J9UTF8* to a java/lang/String.
*/
static jobject
utf8_to_java_lang_String(JNIEnv* env, J9UTF8* utf)
{
PORT_ACCESS_FROM_ENV(env);
char* cstring = utf8_to_cstring(env, utf);
jobject jlString = (*env)->NewStringUTF(env, cstring);
if (NULL != cstring) {
j9mem_free_memory(cstring);
}
return jlString;
}
jobject JNICALL
JVM_GetClassDeclaredConstructors(JNIEnv* env, jclass clazz, jboolean unknown)
{
J9Class* ramClass = NULL;
J9ROMClass* romClass = NULL;
jclass jlrConstructor = NULL;
jobjectArray result = NULL;
char* eyecatcher = "<init>";
U_16 initLength = 6;
jsize size = 0;
PORT_ACCESS_FROM_ENV(env);
ramClass = java_lang_Class_vmRef(env, clazz);
romClass = ramClass->romClass;
/* Primitives/Arrays don't have fields. */
if (J9ROMCLASS_IS_PRIMITIVE_OR_ARRAY(romClass) || J9ROMCLASS_IS_INTERFACE(romClass)) {
size = 0;
} else {
U_32 romMethodCount = romClass->romMethodCount;
J9Method * method = ramClass->ramMethods;
while (romMethodCount-- != 0) {
J9ROMMethod * romMethod = J9_ROM_METHOD_FROM_RAM_METHOD(method++);
J9UTF8 * nameUTF = J9ROMMETHOD_NAME(romMethod);
if (J9UTF8_DATA_EQUALS(J9UTF8_DATA(nameUTF), J9UTF8_LENGTH(nameUTF), eyecatcher, 6)) {
size++;
}
}
}
/* Look up the field class */
jlrConstructor = (*env)->FindClass(env, "java/lang/reflect/Constructor");
if (NULL == jlrConstructor) {
return NULL;
}
/* Create the result array */
result = (*env)->NewObjectArray(env, size, jlrConstructor, NULL);
if (NULL == result) {
return NULL;
}
/* Now walk and fill in the contents */
if (size != 0) {
U_32 romMethodCount = romClass->romMethodCount;
J9Method* method = ramClass->ramMethods;
jsize index = 0;
while (romMethodCount-- != 0) {
J9ROMMethod * romMethod = J9_ROM_METHOD_FROM_RAM_METHOD(method++);
J9UTF8 * nameUTF = J9ROMMETHOD_NAME(romMethod);
if (J9UTF8_DATA_EQUALS(J9UTF8_DATA(nameUTF), J9UTF8_LENGTH(nameUTF), eyecatcher, 6)) {
J9UTF8 * signatureUTF = J9ROMMETHOD_SIGNATURE(romMethod);
char* name = utf8_to_cstring(env, nameUTF);
char* signature = utf8_to_cstring(env, signatureUTF);
jmethodID methodID = (*env)->GetMethodID(env, clazz, name, signature);
jobject reflectedMethod = NULL;
assert(methodID != NULL);
if (NULL != name) {
j9mem_free_memory(name);
}
if (NULL != signature) {
j9mem_free_memory(signature);
}
reflectedMethod = (*env)->ToReflectedMethod(env, clazz, methodID, JNI_FALSE);
assert(reflectedMethod != NULL);
(*env)->SetObjectArrayElement(env, result, index++, reflectedMethod);
}
}
}
return result;
}
jobject JNICALL
JVM_GetClassDeclaredFields(JNIEnv* env, jobject clazz, jint arg2)
{
J9Class* ramClass = NULL;
J9ROMClass* romClass = NULL;
jclass jlrField = NULL;
jsize size = 0;
jobjectArray result = NULL;
J9ROMFieldShape *field = NULL;
J9ROMFieldWalkState walkState;
jsize index = 0;
PORT_ACCESS_FROM_ENV(env);
ramClass = java_lang_Class_vmRef(env, clazz);
romClass = ramClass->romClass;
/* Primitives/Arrays don't have fields. */
if (J9ROMCLASS_IS_PRIMITIVE_OR_ARRAY(romClass)) {
size = 0;
} else {
size = romClass->romFieldCount;
}
/* Look up the field class */
jlrField = (*env)->FindClass(env, "java/lang/reflect/Field");
if (NULL == jlrField) {
return NULL;
}
/* Create the result array */
result = (*env)->NewObjectArray(env, size, jlrField, NULL);
if (NULL == result) {
return NULL;
}
/* Iterate through the fields */
field = romFieldsStartDo( romClass, &walkState );
while (NULL != field) {
U_32 modifiers = field->modifiers;
jfieldID fieldID = 0;
jobject reflectedField = NULL;
jboolean isStatic = JNI_FALSE;
J9UTF8* nameUTF = J9ROMFIELDSHAPE_NAME(field);
J9UTF8* signatureUTF = J9ROMFIELDSHAPE_SIGNATURE(field);
char* name = utf8_to_cstring(env, nameUTF);
char* signature = utf8_to_cstring(env, signatureUTF);
if (J9_ARE_ANY_BITS_SET(modifiers, J9AccStatic)) {
fieldID = (*env)->GetStaticFieldID(env, clazz, name, signature);
isStatic = JNI_TRUE;
} else {
fieldID = (*env)->GetFieldID(env, clazz, name, signature);
isStatic = JNI_FALSE;
}
if (NULL != name) {
j9mem_free_memory(name);
}
if (NULL != signature) {
j9mem_free_memory(signature);
}
assert(fieldID != NULL);
reflectedField = (*env)->ToReflectedField(env, clazz, fieldID, isStatic);
assert(reflectedField != NULL);
(*env)->SetObjectArrayElement(env, result, index++, reflectedField);
field = romFieldsNextDo(&walkState);
}
return result;
}
jobject JNICALL
JVM_GetClassDeclaredMethods(JNIEnv* env, jobject clazz, jboolean unknown)
{
J9Class* ramClass = NULL;
J9ROMClass* romClass = NULL;
jclass jlrMethod = NULL;
jobjectArray result = NULL;
char* eyecatcher = "<init>";
U_16 initLength = 6;
jsize size = 0;
PORT_ACCESS_FROM_ENV(env);
ramClass = java_lang_Class_vmRef(env, clazz);