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callin.cpp
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/*******************************************************************************
* Copyright IBM Corp. and others 2012
*
* 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
*******************************************************************************/
#include "j9accessbarrier.h"
#include "j9protos.h"
#include "j9vmnls.h"
#include "ut_j9vm.h"
#include "util_api.h"
#include "vm_api.h"
#include "vm_internal.h"
#include "j9cp.h"
#include "jni.h"
#include "stackwalk.h"
#include "rommeth.h"
#include "j2sever.h"
#include "objhelp.h"
#include "VMHelpers.hpp"
#include "VMAccess.hpp"
extern "C" {
UDATA
pushReflectArguments(J9VMThread *currentThread, j9object_t parameterTypes, j9object_t arguments)
{
UDATA rc = 1; /* invalid argument count */
U_32 typeCount = J9INDEXABLEOBJECT_SIZE(currentThread, parameterTypes);
if (NULL == arguments) {
if (0 != typeCount) {
goto done;
}
} else if (J9INDEXABLEOBJECT_SIZE(currentThread, arguments) != typeCount) {
goto done;
}
if (0 != typeCount) {
J9JavaVM *vm = currentThread->javaVM;
J9Class * const doubleClass = J9VMJAVALANGDOUBLE_OR_NULL(vm);
J9Class * const longClass = J9VMJAVALANGLONG_OR_NULL(vm);
J9Class * const floatClass = J9VMJAVALANGFLOAT_OR_NULL(vm);
J9Class * const integerClass = J9VMJAVALANGINTEGER_OR_NULL(vm);
J9Class * const byteClass = J9VMJAVALANGBYTE_OR_NULL(vm);
J9Class * const characterClass = J9VMJAVALANGCHARACTER_OR_NULL(vm);
J9Class * const shortClass = J9VMJAVALANGSHORT_OR_NULL(vm);
J9Class * const booleanClass = J9VMJAVALANGBOOLEAN_OR_NULL(vm);
J9Class * const booleanReflectClass = vm->booleanReflectClass;
J9Class * const charReflectClass = vm->charReflectClass;
J9Class * const floatReflectClass = vm->floatReflectClass;
J9Class * const doubleReflectClass = vm->doubleReflectClass;
J9Class * const byteReflectClass = vm->byteReflectClass;
J9Class * const shortReflectClass = vm->shortReflectClass;
J9Class * const intReflectClass = vm->intReflectClass;
J9Class * const longReflectClass = vm->longReflectClass;
UDATA *sp = currentThread->sp;
rc = 2; /* illegal argument */
for (U_32 i = 0; i < typeCount; ++i) {
j9object_t argObject = J9JAVAARRAYOFOBJECT_LOAD(currentThread, arguments, i);
j9object_t typeObject = J9JAVAARRAYOFOBJECT_LOAD(currentThread, parameterTypes, i);
J9Class *type = J9VM_J9CLASS_FROM_HEAPCLASS(currentThread, typeObject);
if (J9ROMCLASS_IS_PRIMITIVE_TYPE(type->romClass)) {
if (NULL != argObject) {
I_32 singleValue = 0;
I_64 doubleValue = 0;
J9Class *argType = J9OBJECT_CLAZZ(currentThread, argObject);
if (argType == doubleClass) {
doubleValue = J9VMJAVALANGDOUBLE_VALUE(currentThread, argObject);
} else if (argType == longClass) {
doubleValue = J9VMJAVALANGLONG_VALUE(currentThread, argObject);
} else if (argType == floatClass) {
singleValue = J9VMJAVALANGFLOAT_VALUE(currentThread, argObject);
} else if (argType == integerClass) {
singleValue = J9VMJAVALANGINTEGER_VALUE(currentThread, argObject);
} else if (argType == byteClass) {
singleValue = J9VMJAVALANGBYTE_VALUE(currentThread, argObject);
} else if (argType == characterClass) {
singleValue = J9VMJAVALANGCHARACTER_VALUE(currentThread, argObject);
} else if (argType == shortClass) {
singleValue = J9VMJAVALANGSHORT_VALUE(currentThread, argObject);
} else if (argType == booleanClass) {
singleValue = J9VMJAVALANGBOOLEAN_VALUE(currentThread, argObject);
} else {
goto done;
}
if (type == booleanReflectClass) {
if (argType == booleanClass) {
pushSingle:
sp -= 1;
*(I_32*)sp = singleValue;
continue;
}
goto done;
}
if (type == charReflectClass) {
if (argType == characterClass) {
goto pushSingle;
}
goto done;
}
if (type == byteReflectClass) {
if (argType == byteClass) {
goto pushSingle;
}
goto done;
}
if (type == shortReflectClass) {
if ((argType == shortClass) || (argType == byteClass)) {
goto pushSingle;
}
goto done;
}
if (type == intReflectClass) {
if ((argType == integerClass) || (argType == characterClass) || (argType == shortClass) || (argType == byteClass)) {
goto pushSingle;
}
goto done;
}
if (type == longReflectClass) {
if (argType == longClass) {
pushDouble:
sp -= 2;
*(I_64*)sp = doubleValue;
continue;
}
if ((argType == integerClass) || (argType == characterClass) || (argType == shortClass) || (argType == byteClass)) {
doubleValue = (I_64)singleValue;
goto pushDouble;
}
goto done;
}
if (type == floatReflectClass) {
if (argType == floatClass) {
goto pushSingle;
}
if ((argType == integerClass) || (argType == characterClass) || (argType == shortClass) || (argType == byteClass)) {
sp -= 1;
*(jfloat*)sp = (jfloat)singleValue;
continue;
}
if (argType == longClass) {
sp -= 1;
*(jfloat*)sp = (jfloat)doubleValue;
continue;
}
goto done;
}
if (type == doubleReflectClass) {
if (argType == doubleClass) {
goto pushDouble;
}
if ((argType == integerClass) || (argType == characterClass) || (argType == shortClass) || (argType == byteClass)) {
sp -= 2;
*(jdouble*)sp = (jdouble)singleValue;
continue;
}
if (argType == longClass) {
sp -= 2;
*(jdouble*)sp = (jdouble)doubleValue;
continue;
}
if (argType == floatClass) {
sp -= 2;
*(jdouble*)sp = (jdouble)*(jfloat*)&singleValue;
continue;
}
goto done;
}
}
goto done;
} else {
if (NULL != argObject) {
if (0 == VM_VMHelpers::inlineCheckCast(J9OBJECT_CLAZZ(currentThread, argObject), type)) {
goto done;
}
}
sp -= 1;
*(j9object_t*)sp = argObject;
}
}
currentThread->sp = sp;
}
rc = 0; /* success */
done:
return rc;
}
extern void c_cInterpreter(J9VMThread *currentThread);
extern J9NameAndSignature const * const exceptionConstructors[];
extern J9NameAndSignature const clinitNameAndSig;
extern J9NameAndSignature const throwableNameAndSig;
extern J9NameAndSignature const printStackTraceNameAndSig;
extern J9NameAndSignature const threadRunNameAndSig;
extern J9NameAndSignature const initNameAndSig;
extern J9NameAndSignature const initCauseNameAndSig;
#if defined(WIN32) && !defined(J9VM_ENV_DATA64)
extern void __cdecl win32ExceptionHandler(void);
extern UDATA getFS0(void);
extern void setFS0(UDATA);
#endif /* WIN32 && !J9VM_ENV_DATA64 */
#if defined(J9VM_PORT_ZOS_CEEHDLRSUPPORT)
#include "leconditionhandler.h"
extern _ENTRY globalLeConditionHandlerENTRY;
#endif /* J9VM_PORT_ZOS_CEEHDLRSUPPORT */
static VMINLINE J9Method*
mapVirtualMethod(J9VMThread *currentThread, J9Method *method, UDATA vTableOffset, J9Class *receiverClass)
{
/* J9_JNI_MID_INTERFACE will be set only for iTable methods. Private interface methods
* and Object methods will not have the tag.
*/
if (J9_ARE_ANY_BITS_SET(vTableOffset, J9_JNI_MID_INTERFACE)) {
UDATA iTableIndex = vTableOffset & ~(UDATA)J9_JNI_MID_INTERFACE;
J9Class *interfaceClass = J9_CLASS_FROM_METHOD(method);
vTableOffset = 0;
J9ITable * iTable = receiverClass->lastITable;
if (interfaceClass == iTable->interfaceClass) {
goto foundITable;
}
iTable = (J9ITable*)receiverClass->iTable;
while (NULL != iTable) {
if (interfaceClass == iTable->interfaceClass) {
receiverClass->lastITable = iTable;
foundITable:
vTableOffset = ((UDATA*)(iTable + 1))[iTableIndex];
break;
}
iTable = iTable->next;
}
}
if (0 != vTableOffset) {
method = *(J9Method**)(((UDATA)receiverClass) + vTableOffset);
}
return method;
}
static VMINLINE UDATA
javaOffloadSwitchOn(J9VMThread *currentThread)
{
#if defined(J9VM_OPT_JAVA_OFFLOAD_SUPPORT)
J9JavaVM *vm = currentThread->javaVM;
if (NULL != vm->javaOffloadSwitchOnWithReasonFunc) {
bool isOffloadWithSubtasks = J9_ARE_ANY_BITS_SET(currentThread->javaOffloadState, J9_JNI_OFFLOAD_WITH_SUBTASKS_FLAG);
if (isOffloadWithSubtasks) {
/* keep offload enabled but turn off allowing created subtasks to offload */
vm->javaOffloadSwitchOnDisableSubtasksWithReasonFunc(currentThread, J9_JNI_OFFLOAD_SWITCH_INTERPRETER);
currentThread->javaOffloadState &= ~J9_JNI_OFFLOAD_WITH_SUBTASKS_FLAG;
} else if (0 == currentThread->javaOffloadState) {
vm->javaOffloadSwitchOnWithReasonFunc(currentThread, J9_JNI_OFFLOAD_SWITCH_INTERPRETER);
}
Assert_VM_unequal(currentThread->javaOffloadState & J9_JNI_OFFLOAD_MAX_VALUE, J9_JNI_OFFLOAD_MAX_VALUE);
currentThread->javaOffloadState += 1;
return isOffloadWithSubtasks ? J9_SSF_JNI_OFFLOAD_WAS_WITH_SUBTASKS : 0;
}
#endif /* J9VM_OPT_JAVA_OFFLOAD_SUPPORT */
return 0;
}
static VMINLINE void
javaOffloadSwitchOff(J9VMThread *currentThread, UDATA frameFlags)
{
#if defined(J9VM_OPT_JAVA_OFFLOAD_SUPPORT)
J9JavaVM *vm = currentThread->javaVM;
if (NULL != vm->javaOffloadSwitchOffWithReasonFunc) {
currentThread->javaOffloadState -= 1;
if (0 == currentThread->javaOffloadState) {
vm->javaOffloadSwitchOffWithReasonFunc(currentThread, J9_JNI_OFFLOAD_SWITCH_INTERPRETER);
} else if (J9_ARE_ANY_BITS_SET(frameFlags, J9_SSF_JNI_OFFLOAD_WAS_WITH_SUBTASKS)) {
/* allow created subtasks to offload */
vm->javaOffloadSwitchOnAllowSubtasksWithReasonFunc(currentThread, J9_JNI_OFFLOAD_SWITCH_INTERPRETER);
currentThread->javaOffloadState |= J9_JNI_OFFLOAD_WITH_SUBTASKS_FLAG;
}
}
#endif /* J9VM_OPT_JAVA_OFFLOAD_SUPPORT */
}
static VMINLINE bool
buildCallInStackFrame(J9VMThread *currentThread, J9VMEntryLocalStorage *newELS, bool returnsObject = false, bool releaseVMAccess = false)
{
Assert_VM_mustHaveVMAccess(currentThread);
bool success = true;
J9VMEntryLocalStorage *oldELS = currentThread->entryLocalStorage;
J9SFJNICallInFrame *frame = ((J9SFJNICallInFrame*)currentThread->sp) - 1;
UDATA flags = javaOffloadSwitchOn(currentThread);
if (NULL != oldELS) {
/* Assuming oldELS > newELS, bytes used is (oldELS - newELS) */
UDATA freeBytes = currentThread->currentOSStackFree;
UDATA usedBytes = ((UDATA)oldELS - (UDATA)newELS);
freeBytes -= usedBytes;
currentThread->currentOSStackFree = freeBytes;
Trc_VM_callin_stackFree(currentThread, freeBytes, newELS);
if ((IDATA)freeBytes < J9_OS_STACK_GUARD) {
if (J9_ARE_NO_BITS_SET(currentThread->privateFlags, J9_PRIVATE_FLAGS_CONSTRUCTING_EXCEPTION)) {
setCurrentExceptionNLS(currentThread, J9VMCONSTANTPOOL_JAVALANGSTACKOVERFLOWERROR, J9NLS_VM_OS_STACK_OVERFLOW);
currentThread->currentOSStackFree += usedBytes;
success = false;
javaOffloadSwitchOff(currentThread, flags);
goto done;
}
}
#if JAVA_SPEC_VERSION >= 19
/* Increment avoided for the first call-in where
* currentThread->entryLocalStorage is NULL.
*/
currentThread->callOutCount += 1;
#endif /* JAVA_SPEC_VERSION >= 19 */
}
if (returnsObject) {
flags |= J9_SSF_RETURNS_OBJECT;
}
if (releaseVMAccess) {
flags |= J9_SSF_REL_VM_ACC;
}
frame->exitAddress = NULL;
frame->specialFrameFlags = flags;
frame->savedCP = currentThread->literals;
frame->savedPC = currentThread->pc;
frame->savedA0 = (UDATA*)((UDATA)currentThread->arg0EA | J9SF_A0_INVISIBLE_TAG);
currentThread->sp = (UDATA*)frame;
currentThread->pc = currentThread->javaVM->callInReturnPC;
currentThread->literals = 0;
currentThread->arg0EA = (UDATA*)&frame->savedA0;
newELS->oldEntryLocalStorage = oldELS;
currentThread->entryLocalStorage = newELS;
#if defined(WIN32) && !defined(J9VM_ENV_DATA64)
if (J9_ARE_NO_BITS_SET(currentThread->javaVM->sigFlags, J9_SIG_XRS_SYNC)) {
newELS->gpLink = (UDATA*)getFS0();
newELS->gpHandler = (UDATA*)win32ExceptionHandler;
newELS->currentVMThread = currentThread;
setFS0((UDATA)&newELS->gpLink);
}
#endif /* WIN32 && !J9VM_ENV_DATA64 */
#if defined(J9VM_PORT_ZOS_CEEHDLRSUPPORT)
if (J9_ARE_ANY_BITS_SET(currentThread->javaVM->sigFlags, J9_SIG_ZOS_CEEHDLR)) {
newELS->entryVMState = setVMState(currentThread, J9VMSTATE_INTERPRETER);
if (J9_ARE_ANY_BITS_SET(currentThread->privateFlags, J9_PRIVATE_FLAGS_STACKS_OUT_OF_SYNC)) {
javaAndCStacksMustBeInSync(currentThread, FALSE);
}
if (J9_ARE_NO_BITS_SET(currentThread->javaVM->sigFlags, J9_SIG_XRS_SYNC)) {
if (J9_ARE_ANY_BITS_SET(currentThread->privateFlags, J9_PRIVATE_FLAGS_SKIP_THREAD_SIGNAL_PROTECTION)) {
/* Do not call CEEHDLR, but clear the flag so that subsequent callins do make the call */
currentThread->privateFlags &= ~J9_PRIVATE_FLAGS_SKIP_THREAD_SIGNAL_PROTECTION;
} else {
newELS->currentVMThread = currentThread;
CEEHDLR(&globalLeConditionHandlerENTRY, (long*)&newELS->currentVMThread, NULL);
}
}
}
#endif /* J9VM_PORT_ZOS_CEEHDLRSUPPORT */
done:
return success;
}
#if JAVA_SPEC_VERSION >= 19
void
#else /* JAVA_SPEC_VERSION >= 19 */
static void
#endif /* JAVA_SPEC_VERSION >= 19 */
restoreCallInFrame(J9VMThread *currentThread)
{
Assert_VM_mustHaveVMAccess(currentThread);
J9SFJNICallInFrame *frame = ((J9SFJNICallInFrame*)(currentThread->arg0EA + 1)) - 1;
UDATA const flags = frame->specialFrameFlags;
bool releaseVMAccess = J9_ARE_ANY_BITS_SET(flags, J9_SSF_REL_VM_ACC);
bool returnsObject = J9_ARE_ANY_BITS_SET(flags, J9_SSF_RETURNS_OBJECT);
UDATA slot0 = currentThread->sp[0];
UDATA slot1 = currentThread->sp[1];
currentThread->literals = frame->savedCP;
currentThread->pc = frame->savedPC;
currentThread->arg0EA = (UDATA*)((UDATA)frame->savedA0 & ~(UDATA)J9SF_A0_INVISIBLE_TAG);
currentThread->sp = (UDATA*)(frame + 1);
if (VM_VMHelpers::exceptionPending(currentThread) || VM_VMHelpers::immediateAsyncPending(currentThread)) {
currentThread->returnValue = 0;
currentThread->returnValue2 = 0;
} else {
if (releaseVMAccess && returnsObject) {
currentThread->returnValue = (UDATA)VM_VMHelpers::createLocalRef((JNIEnv*)currentThread, (j9object_t)slot0);
} else {
currentThread->returnValue = slot0;
currentThread->returnValue2 = slot1;
}
}
J9VMEntryLocalStorage *newELS = currentThread->entryLocalStorage;
J9VMEntryLocalStorage *oldELS = newELS->oldEntryLocalStorage;
if (NULL != oldELS) {
UDATA usedBytes = ((UDATA)oldELS - (UDATA)newELS);
currentThread->currentOSStackFree += usedBytes;
#if JAVA_SPEC_VERSION >= 19
/* Decrement avoided for the last return where
* currentThread->entryLocalStorage is set to NULL.
*/
currentThread->callOutCount -= 1;
#endif /* JAVA_SPEC_VERSION >= 19 */
}
#if defined(WIN32) && !defined(J9VM_ENV_DATA64)
if (J9_ARE_NO_BITS_SET(currentThread->javaVM->sigFlags, J9_SIG_XRS_SYNC)) {
setFS0((UDATA)newELS->gpLink);
}
#endif /* WIN32 && !J9VM_ENV_DATA64 */
#if defined(J9VM_PORT_ZOS_CEEHDLRSUPPORT)
if (J9_ARE_ANY_BITS_SET(currentThread->javaVM->sigFlags, J9_SIG_ZOS_CEEHDLR)) {
setVMState(currentThread, newELS->entryVMState);
}
#endif /* J9VM_PORT_ZOS_CEEHDLRSUPPORT */
currentThread->entryLocalStorage = oldELS;
javaOffloadSwitchOff(currentThread, flags);
}
void JNICALL
sendClinit(J9VMThread *currentThread, J9Class *clazz)
{
Trc_VM_sendClinit_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, false, false)) {
/* Lookup the method */
J9Method *method = (J9Method*)javaLookupMethod(currentThread, clazz, (J9ROMNameAndSignature*)&clinitNameAndSig, NULL, J9_LOOK_STATIC | J9_LOOK_NO_CLIMB | J9_LOOK_NO_THROW | J9_LOOK_DIRECT_NAS);
/* If the method was found, run it */
if (NULL != method) {
Trc_VM_sendClinit_forClass(
currentThread,
J9UTF8_LENGTH(J9ROMCLASS_CLASSNAME(clazz->romClass)),
J9UTF8_DATA(J9ROMCLASS_CLASSNAME(clazz->romClass)));
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)method;
c_cInterpreter(currentThread);
}
restoreCallInFrame(currentThread);
}
Trc_VM_sendClinit_Exit(currentThread);
}
void JNICALL
sendLoadClass(J9VMThread *currentThread, j9object_t classLoaderObject, j9object_t classNameObject)
{
Trc_VM_sendLoadClass_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, true, false)) {
/* Run the method from the vTable */
UDATA vTableOffset = J9VMJAVALANGCLASSLOADER_LOADCLASS_REF(currentThread->javaVM)->methodIndexAndArgCount >> 8;
J9Class *classLoaderClass = J9OBJECT_CLAZZ(currentThread, classLoaderObject);
J9Method *method = *(J9Method**)(((UDATA)classLoaderClass) + vTableOffset);
*--currentThread->sp = (UDATA)classLoaderObject;
*--currentThread->sp = (UDATA)classNameObject;
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)method;
c_cInterpreter(currentThread);
restoreCallInFrame(currentThread);
}
Trc_VM_sendLoadClass_Exit(currentThread);
}
void JNICALL
cleanUpAttachedThread(J9VMThread *currentThread)
{
Trc_VM_cleanUpAttachedThread_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, false, true)) {
j9object_t threadObject = currentThread->threadObject;
if (NULL != threadObject) {
/* Make sure no exception is pending when cleanup is called */
VM_VMHelpers::clearException(currentThread);
/* Run the method */
*--currentThread->sp = (UDATA)threadObject;
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)J9VMJAVALANGJ9VMINTERNALS_THREADCLEANUP_METHOD(currentThread->javaVM);
c_cInterpreter(currentThread);
}
restoreCallInFrame(currentThread);
}
Trc_VM_cleanUpAttachedThread_Exit(currentThread);
}
void JNICALL
handleUncaughtException(J9VMThread *currentThread)
{
Trc_VM_handleUncaughtException_Entry(currentThread);
J9VMEntryLocalStorage newELS;
/* Called only if an exception is pending */
j9object_t exception = currentThread->currentException;
Assert_VM_notNull(exception);
currentThread->currentException = NULL;
/* Report uncaught exception (must be done before new frame) */
TRIGGER_J9HOOK_VM_EXCEPTION_DESCRIBE(currentThread->javaVM->hookInterface, currentThread, exception);
if (buildCallInStackFrame(currentThread, &newELS, false, true)) {
j9object_t threadObject = currentThread->threadObject;
if (NULL != threadObject) {
/* Run the uncaughtException method on the current Thread */
*--currentThread->sp = (UDATA)threadObject;
*--currentThread->sp = (UDATA)exception;
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)J9VMJAVALANGTHREAD_UNCAUGHTEXCEPTION_METHOD(currentThread->javaVM);
c_cInterpreter(currentThread);
}
restoreCallInFrame(currentThread);
}
Trc_VM_handleUncaughtException_Exit(currentThread);
}
void JNICALL
initializeAttachedThreadImpl(J9VMThread *currentThread, const char *name, j9object_t *group, UDATA daemon, J9VMThread *initializee)
{
Trc_VM_initializeAttachedThread_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, false, true)) {
J9JavaVM *vm = currentThread->javaVM;
/* Create cached OutOfMemoryError */
j9object_t cachedOOM = createCachedOutOfMemoryError(currentThread, NULL);
if (NULL != cachedOOM) {
initializee->outOfMemoryError = cachedOOM;
J9MemoryManagerFunctions const * const mmFuncs = vm->memoryManagerFunctions;
j9object_t threadName = NULL;
if (NULL != name) {
/* Allocate a String for the thread name */
threadName = mmFuncs->j9gc_createJavaLangString(currentThread, (U_8*)name, strlen(name), 0);
if (NULL == threadName) {
oom:
setHeapOutOfMemoryError(currentThread);
goto done;
}
}
{
/* Allocate the thread object */
PUSH_OBJECT_IN_SPECIAL_FRAME(currentThread, threadName);
j9object_t threadObject = mmFuncs->J9AllocateObject(currentThread, J9VMJAVALANGTHREAD_OR_NULL(vm), J9_GC_ALLOCATE_OBJECT_NON_INSTRUMENTABLE);
threadName = POP_OBJECT_IN_SPECIAL_FRAME(currentThread);
if (NULL == threadObject) {
goto oom;
}
/* Link the thread and the object */
initializee->threadObject = threadObject;
#if JAVA_SPEC_VERSION >= 19
initializee->carrierThreadObject = threadObject;
#endif /* JAVA_SPEC_VERSION >= 19 */
J9VMJAVALANGTHREAD_SET_THREADREF(currentThread, threadObject, initializee);
/* Run the Thread constructor */
I_32 priority = J9THREAD_PRIORITY_NORMAL;
if (J9_ARE_NO_BITS_SET(vm->runtimeFlags, J9_RUNTIME_NO_PRIORITIES)) {
priority = (I_32)vm->j9Thread2JavaPriorityMap[omrthread_get_priority(initializee->osThread)];
if (priority < J9THREAD_PRIORITY_USER_MIN) {
priority = J9THREAD_PRIORITY_USER_MIN;
} else if (priority > J9THREAD_PRIORITY_USER_MAX) {
priority = J9THREAD_PRIORITY_USER_MAX;
}
}
j9object_t threadGroup = (NULL == group) ? NULL : *group;
*--currentThread->sp = (UDATA)threadObject;
#ifdef J9VM_IVE_RAW_BUILD /* J9VM_IVE_RAW_BUILD is not enabled by default */
/* Oracle constructor takes thread group, thread name */
#if JAVA_SPEC_VERSION >= 19
j9object_t threadHolder = J9VMJAVALANGTHREAD_HOLDER(currentThread, threadObject);
if (NULL != threadHolder) {
J9VMJAVALANGTHREADFIELDHOLDER_SET_PRIORITY(currentThread, threadHolder, priority);
J9VMJAVALANGTHREADFIELDHOLDER_SET_DAEMON(currentThread, threadHolder, (I_32)daemon);
}
#else /* JAVA_SPEC_VERSION >= 19 */
J9VMJAVALANGTHREAD_SET_PRIORITY(currentThread, threadObject, priority);
J9VMJAVALANGTHREAD_SET_ISDAEMON(currentThread, threadObject, (I_32)daemon);
#endif /* JAVA_SPEC_VERSION >= 19 */
*--currentThread->sp = (UDATA)threadGroup;
*--currentThread->sp = (UDATA)threadName;
#else /* J9VM_IVE_RAW_BUILD */
/* J9 constructor takes thread name, thread group, priority and isDaemon */
*--currentThread->sp = (UDATA)threadName;
*--currentThread->sp = (UDATA)threadGroup;
*(I_32*)--currentThread->sp = priority;
*(I_32*)--currentThread->sp = (I_32)daemon;
#endif /* J9VM_IVE_RAW_BUILD */
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)J9VMJAVALANGTHREAD_INIT_METHOD(vm);
c_cInterpreter(currentThread);
J9VMJAVALANGTHREAD_SET_STARTED(currentThread, initializee->threadObject, JNI_TRUE);
}
}
done:
restoreCallInFrame(currentThread);
}
Trc_VM_initializeAttachedThread_Exit(currentThread);
}
void JNICALL
internalSendExceptionConstructor(J9VMThread *currentThread, J9Class *exceptionClass, j9object_t exception, j9object_t detailMessage, UDATA constructorIndex)
{
Trc_VM_internalSendExceptionConstructor_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, false, false)) {
/* Lookup constructor for exception class */
constructorIndex &= J9_EX_CTOR_TYPE_MASK;
J9NameAndSignature const *nas = exceptionConstructors[constructorIndex >> J9_EXCEPTION_INDEX_SHIFT];
UDATA const lookupFlags = J9_LOOK_VIRTUAL | J9_LOOK_NO_CLIMB | J9_LOOK_NO_THROW | J9_LOOK_DIRECT_NAS;
J9Method *method = (J9Method*)javaLookupMethod(currentThread, exceptionClass, (J9ROMNameAndSignature*)nas, NULL, lookupFlags);
/* If the requested constructor is not found, just use <init>(String)V with no detail message */
if (NULL == method) {
method = (J9Method*)javaLookupMethod(currentThread, exceptionClass, (J9ROMNameAndSignature*)&throwableNameAndSig, NULL, lookupFlags);
detailMessage = NULL;
constructorIndex = J9_EX_CTOR_STRING;
}
/* If a constructor was found, push the appropriate parameters and run it */
if (NULL != method) {
*--currentThread->sp = (UDATA)exception;
switch(constructorIndex) {
case J9_EX_CTOR_CLASS_CLASS: {
J9ClassCastParms *parms = (J9ClassCastParms*)detailMessage;
*--currentThread->sp = (UDATA)J9VM_J9CLASS_TO_HEAPCLASS(parms->instanceClass);
*--currentThread->sp = (UDATA)J9VM_J9CLASS_TO_HEAPCLASS(parms->castClass);
break;
}
#if defined(J9VM_ENV_DATA64)
case J9_EX_CTOR_INT:
*(I_32*)--currentThread->sp = (I_32)(UDATA)detailMessage;
break;
#endif /* J9VM_ENV_DATA64 */
default:
*--currentThread->sp = (UDATA)detailMessage;
break;
}
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)method;
c_cInterpreter(currentThread);
}
restoreCallInFrame(currentThread);
}
Trc_VM_internalSendExceptionConstructor_Exit(currentThread);
}
void JNICALL
printStackTrace(J9VMThread *currentThread, j9object_t exception)
{
Trc_VM_printStackTrace_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, false, false)) {
/* Look up the printStackTrace method on the exception instance */
J9Class *exceptionClass = J9OBJECT_CLAZZ(currentThread, exception);
J9Method *method = (J9Method*)javaLookupMethod(currentThread, exceptionClass, (J9ROMNameAndSignature*)&printStackTraceNameAndSig, NULL, J9_LOOK_VIRTUAL | J9_LOOK_DIRECT_NAS);
/* If the method was found, run it (exception is already set if the method cannot be found) */
if (NULL != method) {
*--currentThread->sp = (UDATA)exception;
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)method;
c_cInterpreter(currentThread);
}
restoreCallInFrame(currentThread);
}
Trc_VM_printStackTrace_Exit(currentThread);
}
void JNICALL
runJavaThread(J9VMThread *currentThread)
{
Trc_VM_runJavaThread_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, false, false)) {
/* Lookup the run()V method on the Thread instance */
j9object_t threadObject = currentThread->threadObject;
J9Class *clazz = J9OBJECT_CLAZZ(currentThread, threadObject);
J9Method *method = (J9Method*)javaLookupMethod(currentThread, clazz, (J9ROMNameAndSignature*)&threadRunNameAndSig, NULL, J9_LOOK_VIRTUAL | J9_LOOK_DIRECT_NAS);
/* If the method was found, run it (exception is already set if the method cannot be found) */
if (NULL != method) {
*--currentThread->sp = (UDATA)threadObject;
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)method;
c_cInterpreter(currentThread);
}
restoreCallInFrame(currentThread);
}
Trc_VM_runJavaThread_Exit(currentThread);
}
void JNICALL
runStaticMethod(J9VMThread *currentThread, U_8 *className, J9NameAndSignature *selector, UDATA argCount, UDATA *arguments)
{
/* Assumes that className is a canonical UTF.
* The returnValue and returnValue2 are copies of the top two stack slots when the called method returns.
* On 64-bit, long values are stored in the lower-memory slot of the 2 stack slots required for longs,
* so returnValue contains the return value.
*
* Also, the arguments must be in stack shape (ints in the low-memory half of the stack slot on 64-bit)
* and contain no object pointers, as there are GC points in here before the arguments are copied to
* the stack.
*
* Storing ints in the low-memory half of the stack slot on 64-bit.
* Example: *(I_32 *)arguments = (I_32)value
*/
Trc_VM_runStaticMethod_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, false, true)) {
J9Class *foundClass = internalFindClassUTF8(currentThread, className, strlen((char*)className), currentThread->javaVM->systemClassLoader, J9_FINDCLASS_FLAG_THROW_ON_FAIL);
if (NULL != foundClass) {
/* Initialize the class */
initializeClass(currentThread, foundClass);
if (!VM_VMHelpers::exceptionPending(currentThread)) {
/* Look up the method */
J9Method *method = (J9Method*)javaLookupMethod(currentThread, foundClass, (J9ROMNameAndSignature*)selector, NULL, J9_LOOK_STATIC | J9_LOOK_DIRECT_NAS);
/* If the method was found, run it (exception is already set if the method cannot be found) */
if (NULL != method) {
for (UDATA i = 0; i < argCount; ++i) {
*--currentThread->sp = arguments[i];
}
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)method;
c_cInterpreter(currentThread);
}
}
}
restoreCallInFrame(currentThread);
}
Trc_VM_runStaticMethod_Exit(currentThread);
}
void JNICALL
internalRunStaticMethod(J9VMThread *currentThread, J9Method *method, BOOLEAN returnsObject, UDATA argCount, UDATA* arguments)
{
Trc_VM_internalRunStaticMethod_Entry(currentThread);
J9VMEntryLocalStorage newELS;
Assert_VM_false(VM_VMHelpers::classRequiresInitialization(currentThread, J9_CLASS_FROM_METHOD(method)));
if (buildCallInStackFrame(currentThread, &newELS, returnsObject != 0, false)) {
for (UDATA i = 0; i < argCount; ++i) {
*--currentThread->sp = arguments[i];
}
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)method;
c_cInterpreter(currentThread);
restoreCallInFrame(currentThread);
}
Trc_VM_internalRunStaticMethod_Exit(currentThread);
}
#if JAVA_SPEC_VERSION < 24
void JNICALL
sendCheckPackageAccess(J9VMThread *currentThread, J9Class *clazz, j9object_t protectionDomain)
{
Trc_VM_sendCheckPackageAccess_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, false, false)) {
/* Run the method */
*--currentThread->sp = (UDATA)J9VM_J9CLASS_TO_HEAPCLASS(clazz);
*--currentThread->sp = (UDATA)protectionDomain;
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)J9VMJAVALANGJ9VMINTERNALS_CHECKPACKAGEACCESS_METHOD(currentThread->javaVM);
c_cInterpreter(currentThread);
restoreCallInFrame(currentThread);
}
Trc_VM_sendCheckPackageAccess_Exit(currentThread);
}
#endif /* JAVA_SPEC_VERSION < 24 */
void JNICALL
sendCompleteInitialization(J9VMThread *currentThread)
{
Trc_VM_sendCompleteInitialization_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, false, true)) {
/* Run the method */
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)J9VMJAVALANGJ9VMINTERNALS_COMPLETEINITIALIZATION_METHOD(currentThread->javaVM);
c_cInterpreter(currentThread);
restoreCallInFrame(currentThread);
}
Trc_VM_sendCompleteInitialization_Exit(currentThread);
}
#if JAVA_SPEC_VERSION >= 11
static bool
isAccessibleToAllModulesViaReflection(J9VMThread *currentThread, J9Class *clazz, bool javaBaseLoaded)
{
J9JavaVM *vm = currentThread->javaVM;
bool isAccessible = true;
J9Module *module = clazz->module;
if (!J9_IS_J9MODULE_UNNAMED(vm, module) && !J9_IS_J9MODULE_OPEN(module)) {
if (javaBaseLoaded) {
const U_8* packageName = NULL;
UDATA packageNameLength = 0;
J9PackageIDTableEntry entry = {0};
J9Package *package = NULL;
UDATA err = 0;
entry.taggedROMClass = clazz->packageID;
packageName = getPackageName(&entry, &packageNameLength);
omrthread_monitor_enter(vm->classLoaderModuleAndLocationMutex);
package = getPackageDefinitionWithName(currentThread, module, (U_8*) packageName, (U_16) packageNameLength, &err);
omrthread_monitor_exit(vm->classLoaderModuleAndLocationMutex);
if ((ERRCODE_SUCCESS != err) || (0 == package->exportToAll)) {
isAccessible = false;
}
} else {
isAccessible = false;
}
}
return isAccessible;
}
#endif /* JAVA_SPEC_VERSION >= 11 */
void JNICALL
sendInit(J9VMThread *currentThread, j9object_t object, J9Class *senderClass, UDATA lookupOptions)
{
Trc_VM_sendInit_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, false, false)) {
J9Class *clazz = J9OBJECT_CLAZZ(currentThread, object);
J9Method *method = clazz->initializerCache;
if (NULL == method) {
/* Lookup the <init> method for the object */
method = (J9Method*)javaLookupMethod(currentThread, clazz, (J9ROMNameAndSignature*)&initNameAndSig, senderClass, J9_LOOK_VIRTUAL | J9_LOOK_DIRECT_NAS | lookupOptions);
if ((NULL != method) && (J9_ARE_NO_BITS_SET(clazz->classFlags, J9ClassDoNotAttemptToSetInitCache))) {
J9JavaVM *vm = currentThread->javaVM;
bool javaBaseLoaded = J9_ARE_ALL_BITS_SET(vm->runtimeFlags, J9_RUNTIME_JAVA_BASE_MODULE_CREATED);
if (J9_ARE_ANY_BITS_SET(clazz->romClass->modifiers, J9AccPublic)) {
if (J9_ARE_ANY_BITS_SET(J9_ROM_METHOD_FROM_RAM_METHOD(method)->modifiers, J9AccPublic)) {
if (!J9_ARE_MODULES_ENABLED(vm)
#if JAVA_SPEC_VERSION >= 11
|| isAccessibleToAllModulesViaReflection(currentThread, clazz, javaBaseLoaded)
#endif /* JAVA_SPEC_VERSION >= 11 */
) {
clazz->initializerCache = method;
} else if (javaBaseLoaded) {
/* remember that this class is not accessible to all. We can only set this
* after the module system is ready as there is no way of knowing before hand.*/
clazz->classFlags |= J9ClassDoNotAttemptToSetInitCache;
}
}
}
}
}
if (NULL != method) {
/* Run the method */
*--currentThread->sp = (UDATA)object;
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)method;
c_cInterpreter(currentThread);
}
restoreCallInFrame(currentThread);
}
Trc_VM_sendInit_Exit(currentThread);
}
void JNICALL
sendInitCause(J9VMThread *currentThread, j9object_t receiver, j9object_t cause)
{
Trc_VM_sendInitCause_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, true, false)) {
/* Look up initCause */
J9Method *method = (J9Method*)javaLookupMethod(currentThread, J9OBJECT_CLAZZ(currentThread, receiver), (J9ROMNameAndSignature*)&initCauseNameAndSig, NULL, J9_LOOK_VIRTUAL | J9_LOOK_DIRECT_NAS | J9_LOOK_NO_THROW);
*--currentThread->sp = (UDATA)receiver;
/* If the method is not found, leave the receiver on stack as the return value (initCause returns this) */
if (NULL != method) {
/* Run the method */
*--currentThread->sp = (UDATA)cause;
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)method;
c_cInterpreter(currentThread);
}
restoreCallInFrame(currentThread);
}
Trc_VM_sendInitCause_Exit(currentThread);
}
void JNICALL
sendInitializationAlreadyFailed(J9VMThread *currentThread, J9Class *clazz)
{
Trc_VM_sendInitializationAlreadyFailed_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, true, false)) {
/* Run the method */
*--currentThread->sp = (UDATA)J9VM_J9CLASS_TO_HEAPCLASS(clazz);
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)J9VMJAVALANGJ9VMINTERNALS_INITIALIZATIONALREADYFAILED_METHOD(currentThread->javaVM);
c_cInterpreter(currentThread);
restoreCallInFrame(currentThread);
}
Trc_VM_sendInitializationAlreadyFailed_Exit(currentThread);
}
void JNICALL
sendRecordInitializationFailure(J9VMThread *currentThread, J9Class *clazz, j9object_t throwable)
{
Trc_VM_sendRecordInitializationFailure_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, true, false)) {
/* Run the method */
*--currentThread->sp = (UDATA)J9VM_J9CLASS_TO_HEAPCLASS(clazz);
*--currentThread->sp = (UDATA)throwable;
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)J9VMJAVALANGJ9VMINTERNALS_RECORDINITIALIZATIONFAILURE_METHOD(currentThread->javaVM);
c_cInterpreter(currentThread);
restoreCallInFrame(currentThread);
}
Trc_VM_sendRecordInitializationFailure_Exit(currentThread);
}
void JNICALL
sendFromMethodDescriptorString(J9VMThread *currentThread, J9UTF8 *descriptor, J9ClassLoader *classLoader, J9Class *appendArgType)
{
Trc_VM_sendFromMethodDescriptorString_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, true, false)) {
/* Convert descriptor to a String */
J9JavaVM *vm = currentThread->javaVM;
J9MemoryManagerFunctions const * const mmFuncs = vm->memoryManagerFunctions;
j9object_t descriptorString = mmFuncs->j9gc_createJavaLangString(currentThread, J9UTF8_DATA(descriptor), J9UTF8_LENGTH(descriptor), 0);
if (NULL != descriptorString) {
/* Run the method */
*--currentThread->sp = (UDATA)descriptorString;
*--currentThread->sp = (UDATA)classLoader->classLoaderObject;
*--currentThread->sp = (UDATA)J9VM_J9CLASS_TO_HEAPCLASS(appendArgType);
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)J9VMJAVALANGINVOKEMETHODTYPEHELPER_VMRESOLVEFROMMETHODDESCRIPTORSTRING_METHOD(vm);
c_cInterpreter(currentThread);
}
restoreCallInFrame(currentThread);
}
Trc_VM_sendFromMethodDescriptorString_Exit(currentThread);
}
void JNICALL
sendResolveMethodHandle(J9VMThread *currentThread, UDATA cpIndex, J9ConstantPool *ramCP, J9Class *definingClass, J9ROMNameAndSignature* nameAndSig)
{
Trc_VM_sendResolveMethodHandle_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, true, false)) {
/* Convert name and signature to String objects */
J9JavaVM *vm = currentThread->javaVM;
J9MemoryManagerFunctions const * const mmFuncs = vm->memoryManagerFunctions;
J9UTF8 *nameUTF = J9ROMNAMEANDSIGNATURE_NAME(nameAndSig);
j9object_t nameString = mmFuncs->j9gc_createJavaLangString(currentThread, J9UTF8_DATA(nameUTF), J9UTF8_LENGTH(nameUTF), 0);
if (NULL != nameString) {
J9UTF8 *sigUTF = J9ROMNAMEANDSIGNATURE_SIGNATURE(nameAndSig);
PUSH_OBJECT_IN_SPECIAL_FRAME(currentThread, nameString);
j9object_t sigString = mmFuncs->j9gc_createJavaLangString(currentThread, J9UTF8_DATA(sigUTF), J9UTF8_LENGTH(sigUTF), 0);
nameString = POP_OBJECT_IN_SPECIAL_FRAME(currentThread);
if (NULL != sigString) {
/* Run the method */
J9ROMMethodHandleRef *romCPEntry = (J9ROMMethodHandleRef*)(ramCP->romConstantPool + cpIndex);
J9Class *clazz = ramCP->ramClass;
*(I_32*)--currentThread->sp = (I_32)(romCPEntry->handleTypeAndCpType >> J9DescriptionCpTypeShift);
*--currentThread->sp = (UDATA)J9VM_J9CLASS_TO_HEAPCLASS(clazz);
*--currentThread->sp = (UDATA)J9VM_J9CLASS_TO_HEAPCLASS(definingClass);
*--currentThread->sp = (UDATA)nameString;
*--currentThread->sp = (UDATA)sigString;
*--currentThread->sp = (UDATA)clazz->classLoader->classLoaderObject;
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)J9VMJAVALANGINVOKEMETHODHANDLERESOLVER_SENDRESOLVEMETHODHANDLE_METHOD(vm);
c_cInterpreter(currentThread);
}
}
restoreCallInFrame(currentThread);
}
Trc_VM_sendResolveMethodHandle_Exit(currentThread);
}
void JNICALL
sendForGenericInvoke(J9VMThread *currentThread, j9object_t methodHandle, j9object_t methodType, UDATA dropFirstArg)
{
#if defined(J9VM_OPT_METHOD_HANDLE)
Trc_VM_sendForGenericInvoke_Entry(currentThread);
J9VMEntryLocalStorage newELS;
if (buildCallInStackFrame(currentThread, &newELS, true, false)) {
/* Run the method */
*--currentThread->sp = (UDATA)methodHandle;
*--currentThread->sp = (UDATA)methodType;
*(I_32*)--currentThread->sp = (I_32)dropFirstArg;
currentThread->returnValue = J9_BCLOOP_RUN_METHOD;
currentThread->returnValue2 = (UDATA)J9VMJAVALANGINVOKEMETHODHANDLE_FORGENERICINVOKE_METHOD(currentThread->javaVM);
c_cInterpreter(currentThread);
restoreCallInFrame(currentThread);
}
Trc_VM_sendForGenericInvoke_Exit(currentThread);
#else /* defined(J9VM_OPT_OPENJDK_METHODHANDLE) */
Assert_VM_unreachable();
#endif /* defined(J9VM_OPT_METHOD_HANDLE) */
}
void JNICALL
sendResolveOpenJDKInvokeHandle(J9VMThread *currentThread, J9ConstantPool *ramCP, UDATA cpIndex, I_32 refKind, J9Class *resolvedClass, J9ROMNameAndSignature *nameAndSig)