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jvminit.c
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/*******************************************************************************
* Copyright IBM Corp. and others 1991
*
* 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
*******************************************************************************/
#if defined(WIN32)
#include <windows.h>
#define USER32_DLL "user32.dll"
#include <WinSDKVer.h>
#if defined(_WIN32_WINNT_WINBLUE) && (_WIN32_WINNT_MAXVER >= _WIN32_WINNT_WINBLUE)
#include <VersionHelpers.h>
#endif
#endif /* defined(WIN32) */
/* _GNU_SOURCE forces GLIBC_2.0 sscanf/vsscanf/fscanf for RHEL5 compatibility */
#if defined(LINUX) && !defined(J9ZTPF)
#define _GNU_SOURCE
#endif /* defined(LINUX) && !defined(J9ZTPF) */
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <limits.h>
#include "util_api.h"
#if JAVA_SPEC_VERSION >= 16
#include "vm_internal.h"
#endif /* JAVA_SPEC_VERSION >= 16 */
#if !defined(stdout)
#define stdout NULL
#endif
#if !defined(WIN32)
/* Needed for JCL dependency on JVM to set SIGPIPE to SIG_IGN */
#include <signal.h>
#endif
#include "omrcfg.h"
#include "jvminitcommon.h"
#include "j9user.h"
#include "j9.h"
#include "omr.h"
#include "j9protos.h"
#include "jni.h"
#include "j9port.h"
#include "omrthread.h"
#include "j9consts.h"
#include "j9dump.h"
#include "jvminit.h"
#include "vm_api.h"
#include "vmaccess.h"
#include "vmhook_internal.h"
#include "mmhook.h"
#include "portsock.h"
#include "vmi.h"
#include "vm_internal.h"
#include "javaPriority.h"
#include "thread_api.h"
#include "jvmstackusage.h"
#include "omrsig.h"
#include "bcnames.h"
#include "jimagereader.h"
#include "vendor_version.h"
#include "omrlinkedlist.h"
#ifdef J9VM_OPT_ZIP_SUPPORT
#include "zip_api.h"
#endif
#define _UTE_STATIC_
#include "ut_j9vm.h"
#ifdef J9OS_I5
#include "Xj9I5OSDebug.H"
#endif
#ifdef J9ZTPF
#include <tpf/cujvm.h> /* for z/TPF OS VM exit hook: cjvm_jvm_shutdown_hook() */
#endif
/*#define JVMINIT_UNIT_TEST*/
#include "j2sever.h"
#include "locknursery.h"
#include "vmargs_api.h"
#include "rommeth.h"
#if defined(J9VM_OPT_SHARED_CLASSES)
#include "SCAbstractAPI.h"
#endif
#if JAVA_SPEC_VERSION >= 19
#include "omrutil.h"
#endif /* JAVA_SPEC_VERSION >= 19 */
#if defined(AIXPPC) && !defined(J9OS_I5)
#include <sys/systemcfg.h> /* for isPPC64bit() */
#endif /* AIXPPC && !J9OS_I5 */
J9_EXTERN_BUILDER_SYMBOL(cInterpreter);
/* Generic rounding macro - result is a UDATA */
#define ROUND_TO(granularity, number) (((UDATA)(number) + (granularity) - 1) & ~((UDATA)(granularity) - 1))
extern vmiError J9VMI_Initialize(J9JavaVM* vm);
#if (defined(J9VM_OPT_SIDECAR))
void sidecarInit (J9VMThread *mainThread);
#endif
typedef void (JNICALL * J9_EXIT_HANDLER_PROC) (jint);
typedef void (JNICALL * J9_ABORT_HANDLER_PROC) (void);
struct J9VMIgnoredOption {
char *optionName;
IDATA match;
};
typedef struct {
void * vm_args;
void * osMainThread;
J9JavaVM * vm;
J9JavaVM** globalJavaVM;
UDATA j2seVersion;
char* j2seRootDirectory;
char* j9libvmDirectory;
} J9InitializeJavaVMArgs;
#define IGNORE_ME_STRING "_ignore_me"
#define SILENT_EXIT_STRING "_silent_exit"
#define OPT_NONE "none"
#define OPT_NONE_CAPS "NONE"
#define DJCOPT_JITC "jitc"
#define OPT_TRUE "true"
#define XRUN_LEN (sizeof(VMOPT_XRUN)-1)
#define DLLNAME_LEN 32 /* this value should be consistent with that in J9VMDllLoadInfo */
#define SMALL_STRING_BUF_SIZE 64
#define MED_STRING_BUF_SIZE 128
#define LARGE_STRING_BUF_SIZE 256
#define FUNCTION_VM_INIT "VMInitStages"
#define FUNCTION_THREAD_INIT "threadInitStages"
#define FUNCTION_ZERO_INIT "zeroInitStages"
#define ENSUREHASHED_INITIAL_TABLE_SIZE 16
static const struct J9VMIgnoredOption ignoredOptionTable[] = {
{ IGNORE_ME_STRING, EXACT_MATCH },
{ VMOPT_XDEBUG, EXACT_MATCH },
{ VMOPT_XNOAGENT, EXACT_MATCH },
{ VMOPT_XINCGC, EXACT_MATCH }, /* JNLP param */
{ VMOPT_XMIXED, EXACT_MATCH }, /* JNLP param */
{ VMOPT_XPROF, EXACT_MATCH }, /* JNLP param */
{ VMOPT_XBATCH, EXACT_MATCH }, /* JNLP param */
{ VMOPT_PORT_LIBRARY, EXACT_MATCH },
{ VMOPT_BFU_JAVA, EXACT_MATCH },
{ VMOPT_BP_JXE, EXACT_MATCH },
{ VMOPT_NEEDS_JCL, EXACT_MATCH },
{ VMOPT_VFPRINTF, EXACT_MATCH },
{ VMOPT_EXIT, EXACT_MATCH },
{ VMOPT_ABORT, EXACT_MATCH },
{ VMOPT_XNOQUICKSTART, EXACT_MATCH },
{ VMOPT_XJ9, EXACT_MATCH },
{ VMOPT_XMXCL, STARTSWITH_MATCH },
/* extra-extended options start with -XX. Ignore any not explicitly processed. */
#if defined(J9VM_OPT_SIDECAR)
{ VMOPT_XJVM, STARTSWITH_MATCH },
{ VMOPT_SERVER, EXACT_MATCH },
{ VMOPT_X142BOOSTGCTHRPRIO, EXACT_MATCH },
{ MAPOPT_XSIGCATCH, EXACT_MATCH },
{ MAPOPT_XNOSIGCATCH, EXACT_MATCH },
{ MAPOPT_XINITACSH, EXACT_MEMORY_MATCH },
{ MAPOPT_XINITSH, EXACT_MEMORY_MATCH },
{ MAPOPT_XINITTH, EXACT_MEMORY_MATCH },
{ MAPOPT_XK, EXACT_MEMORY_MATCH },
{ MAPOPT_XP, EXACT_MEMORY_MATCH },
{ VMOPT_XNORTSJ, EXACT_MATCH },
#if !(defined(OMR_GC_COMPRESSED_POINTERS) && defined(OMR_GC_FULL_POINTERS))
{ VMOPT_XCOMPRESSEDREFS, EXACT_MATCH },
{ VMOPT_XNOCOMPRESSEDREFS, EXACT_MATCH },
#endif /* !(defined(OMR_GC_COMPRESSED_POINTERS) && defined(OMR_GC_FULL_POINTERS)) */
#endif /* defined(J9VM_OPT_SIDECAR) */
};
#define ignoredOptionTableSize (sizeof(ignoredOptionTable) / sizeof(struct J9VMIgnoredOption))
IDATA VMInitStages (J9JavaVM *vm, IDATA stage, void* reserved);
IDATA registerCmdLineMapping (J9JavaVM* vm, char* sov_option, char* j9_option, UDATA mapFlags);
IDATA postInitLoadJ9DLL (J9JavaVM* vm, const char* dllName, void* argData);
void freeJavaVM (J9JavaVM * vm);
IDATA threadInitStages (J9JavaVM* vm, IDATA stage, void* reserved);
IDATA zeroInitStages (J9JavaVM* vm, IDATA stage, void* reserved);
UDATA runJVMOnLoad (J9JavaVM* vm, J9VMDllLoadInfo* loadInfo, char* options);
static void consumeVMArgs (J9JavaVM* vm, J9VMInitArgs* j9vm_args);
static BOOLEAN isEmpty (const char * str);
#if (defined(J9VM_OPT_SIDECAR))
static UDATA initializeJVMExtensionInterface (J9JavaVM* vm);
#endif /* J9VM_OPT_SIDECAR */
static UDATA initializeVprintfHook (J9JavaVM* vm);
#if (defined(J9VM_INTERP_VERBOSE))
static const char* getNameForLoadStage (IDATA stage);
#endif /* J9VM_INTERP_VERBOSE */
static jint runInitializationStage (J9JavaVM* vm, IDATA stage);
static IDATA setSignalOptions(J9JavaVM *vm, J9PortLibrary *portLibrary);
#if (defined(J9VM_OPT_SIDECAR))
void sidecarExit(J9VMThread* shutdownThread);
#endif /* J9VM_OPT_SIDECAR */
static jint runLoadStage (J9JavaVM *vm, IDATA flags);
#if defined(J9VM_GC_DYNAMIC_CLASS_UNLOADING)
static void freeClassNativeMemory (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#endif /* GC_DYNAMIC_CLASS_UNLOADING */
static jint runShutdownStage (J9JavaVM* vm, IDATA stage, void* reserved, UDATA filterFlags);
static jint modifyDllLoadTable (J9JavaVM * vm, J9Pool* loadTable, J9VMInitArgs* j9vm_args);
static jint processVMArgsFromFirstToLast(J9JavaVM * vm);
static void processCompressionOptions(J9JavaVM *vm);
static IDATA setMemoryOptionToOptElse (J9JavaVM* vm, UDATA* thingToSet, char* optionName, UDATA defaultValue, UDATA doConsumeArg);
static IDATA setIntegerValueOptionToOptElse (J9JavaVM* vm, UDATA* thingToSet, char* optionName, UDATA defaultValue, UDATA doConsumeArg);
#ifdef JVMINIT_UNIT_TEST
static void testFindArgs (J9JavaVM* vm);
static void testOptionValueOps (J9JavaVM* vm);
#endif
static jint initializeXruns (J9JavaVM* vm);
static void unloadDLL (void* dllLoadInfo, void* userDataTemp);
#if (defined(J9VM_PROF_COUNT_ARGS_TEMPS))
static void report (J9JavaVM * vm);
#endif /* J9VM_PROF_COUNT_ARGS_TEMPS */
#if (defined(J9VM_OPT_SIDECAR))
static IDATA createMapping (J9JavaVM* vm, char* j9Name, char* mapName, UDATA flags, IDATA atIndex);
#endif /* J9VM_OPT_SIDECAR */
#if (defined(J9VM_OPT_JVMTI))
static void detectAgentXruns (J9JavaVM* vm);
#endif /* J9VM_OPT_JVMTI */
static void vfprintfHook (struct OMRPortLibrary *portLib, const char *format, ...);
static IDATA vfprintfHook_file_write_text(struct OMRPortLibrary *portLibrary, IDATA fd, const char *buf, IDATA nbytes);
static void runJ9VMDllMain (void* dllLoadInfo, void* userDataTemp);
static jint checkPostStage (J9JavaVM* vm, IDATA stage);
static void runUnOnloads (J9JavaVM* vm, UDATA shutdownDueToExit);
static void generateMemoryOptionParseError (J9JavaVM* vm, J9VMDllLoadInfo* loadInfo, UDATA errorType, char* optionWithError);
static void loadDLL (void* dllLoadInfo, void* userDataTemp);
static void registerIgnoredOptions (J9PortLibrary *portLibrary, J9VMInitArgs* j9vm_args);
static UDATA protectedInitializeJavaVM (J9PortLibrary* portLibrary, void * userData);
static J9Pool *initializeDllLoadTable (J9PortLibrary *portLibrary, J9VMInitArgs* j9vm_args, UDATA verboseFlags, J9JavaVM *vm);
#if (defined(J9VM_OPT_SIDECAR))
static IDATA checkDjavacompiler (J9PortLibrary *portLibrary, J9VMInitArgs* j9vm_args);
#endif /* J9VM_OPT_SIDECAR */
static void* getOptionExtraInfo (J9PortLibrary *portLibrary, J9VMInitArgs* j9vm_args, IDATA match, char* optionName);
static void closeAllDLLs (J9JavaVM* vm);
#if (defined(J9VM_INTERP_VERBOSE))
static const char* getNameForStage (IDATA stage);
#endif /* J9VM_INTERP_VERBOSE */
#if (defined(J9VM_OPT_SIDECAR))
static IDATA registerVMCmdLineMappings (J9JavaVM* vm);
#endif /* J9VM_OPT_SIDECAR */
static void checkDllInfo (void* dllLoadInfo, void* userDataTemp);
static UDATA initializeVTableScratch(J9JavaVM* vm);
static jint initializeDDR (J9JavaVM * vm);
static void setThreadNameAsyncHandler(J9VMThread *currentThread, IDATA handlerKey, void *userData);
#if defined(J9VM_INTERP_CUSTOM_SPIN_OPTIONS)
static void cleanCustomSpinOptions(void *element, void *userData);
#endif /* J9VM_INTERP_CUSTOM_SPIN_OPTIONS */
/* Imports from vm/rasdump.c */
extern void J9RASInitialize (J9JavaVM* javaVM);
extern void J9RelocateRASData (J9JavaVM* javaVM);
extern void J9RASShutdown (J9JavaVM* javaVM);
extern void populateRASNetData (J9JavaVM *javaVM, J9RAS *rasStruct);
const U_8 J9CallInReturnPC[] = { 0xFF, 0x00, 0x00, 0xFF }; /* impdep2, parm, parm, impdep2 */
#if defined(J9VM_OPT_METHOD_HANDLE)
const U_8 J9Impdep1PC[] = { 0xFE, 0x00, 0x00, 0xFE }; /* impdep1, parm, parm, impdep1 */
#endif /* defined(J9VM_OPT_METHOD_HANDLE) */
static jint (JNICALL * vprintfHookFunction)(FILE *fp, const char *format, va_list args) = NULL;
static IDATA (* portLibrary_file_write_text) (struct OMRPortLibrary *portLibrary, IDATA fd, const char *buf, IDATA nbytes) = NULL;
#if !defined(WIN32)
static UDATA sigxfszHandler(struct J9PortLibrary* portLibrary, U_32 gpType, void* gpInfo, void* userData);
#endif /* !defined(WIN32) */
/* SSE2 support on 32 bit linux_x86 and win_x86 */
#ifdef J9VM_ENV_SSE2_SUPPORT_DETECTION
extern U_32 J9SSE2cpuidFeatures(void);
static BOOLEAN isSSE2SupportedOnX86();
#endif /* J9VM_ENV_SSE2_SUPPORT_DETECTION */
#if (defined(AIXPPC) || defined(LINUXPPC)) && !defined(J9OS_I5)
static BOOLEAN isPPC64bit(void);
#endif /* (AIXPPC || LINUXPPC) & !J9OS_I5 */
static UDATA predefinedHandlerWrapper(struct J9PortLibrary *portLibrary, U_32 gpType, void *gpInfo, void *userData);
static void signalDispatch(J9VMThread *vmThread, I_32 sigNum);
static UDATA parseGlrConfig(J9JavaVM* jvm, char* options);
static UDATA parseGlrOption(J9JavaVM* jvm, char* option);
static void cleanupEnsureHashedConfig(J9JavaVM *jvm);
static UDATA parseEnsureHashedConfig(J9JavaVM *jvm, char *options, BOOLEAN isAdd);
#if JAVA_SPEC_VERSION >= 16
static UDATA freeUpcallMetaDataDoFn(J9UpcallMetaDataEntry *entry, void *userData);
#endif /* JAVA_SPEC_VERSION >= 16 */
J9_DECLARE_CONSTANT_UTF8(j9_int_void, "(I)V");
J9_DECLARE_CONSTANT_UTF8(j9_dispatch, "dispatch");
/* The appropriate bytecodeLoop is selected based on interpreter mode */
#if defined(OMR_GC_FULL_POINTERS)
UDATA bytecodeLoopFull(J9VMThread *currentThread);
#if defined(J9VM_OPT_CRIU_SUPPORT)
UDATA criuBytecodeLoopFull(J9VMThread *currentThread);
#endif /* defined(J9VM_OPT_CRIU_SUPPORT) */
UDATA debugBytecodeLoopFull(J9VMThread *currentThread);
#endif /* defined(OMR_GC_FULL_POINTERS) */
#if defined(OMR_GC_COMPRESSED_POINTERS)
UDATA bytecodeLoopCompressed(J9VMThread *currentThread);
#if defined(J9VM_OPT_CRIU_SUPPORT)
UDATA criuBytecodeLoopCompressed(J9VMThread *currentThread);
#endif /* defined(J9VM_OPT_CRIU_SUPPORT) */
UDATA debugBytecodeLoopCompressed(J9VMThread *currentThread);
#endif /* defined(OMR_GC_COMPRESSED_POINTERS) */
#if (defined(OMR_GC_COMPRESSED_POINTERS) && defined(OMR_GC_FULL_POINTERS)) || (defined(LINUX) && defined(J9VM_GC_REALTIME))
static BOOLEAN isGCPolicyMetronome(J9JavaVM *javaVM);
#endif /* (defined(OMR_GC_COMPRESSED_POINTERS) && defined(OMR_GC_FULL_POINTERS)) || (defined(LINUX) && defined(J9VM_GC_REALTIME)) */
#if defined(COUNT_BYTECODE_PAIRS)
static jint
initializeBytecodePairs(J9JavaVM *vm)
{
PORT_ACCESS_FROM_JAVAVM(vm);
jint rc = JNI_ENOMEM;
UDATA allocSize = sizeof(UDATA) * 256 * 256;
UDATA *matrix = j9mem_allocate_memory(allocSize, OMRMEM_CATEGORY_VM);
if (NULL != matrix) {
memset(matrix, 0, allocSize);
vm->debugField1 = (UDATA)matrix;
rc = JNI_OK;
}
return rc;
}
void
printBytecodePairs(J9JavaVM *vm)
{
UDATA *matrix = (UDATA*)vm->debugField1;
if (NULL != matrix) {
PORT_ACCESS_FROM_JAVAVM(vm);
UDATA i = 0;
UDATA j = 0;
for (i = 0; i < 256; ++i) {
for (j = 0; j < 256; ++j) {
UDATA count = matrix[(i * 256) + j];
if (0 != count) {
j9tty_printf(PORTLIB, "%09zu %s->%s\n", count, JavaBCNames[i], JavaBCNames[j]);
}
}
}
}
}
static void
freeBytecodePairs(J9JavaVM *vm)
{
PORT_ACCESS_FROM_JAVAVM(vm);
UDATA *matrix = (UDATA*)vm->debugField1;
printBytecodePairs(vm);
vm->debugField1 = 0;
j9mem_free_memory(matrix);
}
#endif /* COUNT_BYTECODE_PAIRS */
static void
print_verbose_stackusage_of_nonsystem_threads(J9VMThread* vmThread)
{
J9VMThread * currentThread;
J9JavaVM * vm = vmThread->javaVM;
if ((vm->runtimeFlags & J9_RUNTIME_REPORT_STACK_USE) && vmThread->stackObject && (vm->verboseLevel & VERBOSE_STACK)) {
/* Failing to check for NULL leads to a endless spin.*/
if((NULL == vm->vmThreadListMutex) || omrthread_monitor_try_enter(vm->vmThreadListMutex)) {
/*vmThreadListMutex is null. Nothing to get lock on.*/
/*If omrthread_monitor_try_enter returns true, it failed to get the lock. If it succeeds to enter, then it returns 0*/
PORT_ACCESS_FROM_JAVAVM(vm);
j9nls_printf(PORTLIB, J9NLS_INFO, J9NLS_VERB_STACK_USAGE_FOR_RUNNING_THREADS_FAILURE_1);
}else{
/*got the lock*/
currentThread = vmThread->linkNext;
while (currentThread != vmThread) {
J9VMThread * nextThread = currentThread->linkNext;
if (currentThread->privateFlags & J9_PRIVATE_FLAGS_SYSTEM_THREAD ) {
/*DO NOTHING. These threads will be handled automatically by system.exit()*/
} else {
/*
* Print stack usage info for running non-system threads.
* When system.exit() is called, it prints stack usage info for system thread and a thread that calls system.exit()
*/
print_verbose_stackUsage(currentThread, TRUE);
}
currentThread = nextThread;
}
/*Release the lock*/
omrthread_monitor_exit(vm->vmThreadListMutex);
}
}
}
void
print_verbose_stackUsage(J9VMThread* vmThread, UDATA stillRunning)
{
UDATA *stackSlot = J9_LOWEST_STACK_SLOT(vmThread);
UDATA nbyteUsed = (vmThread->stackObject->end - stackSlot) * sizeof(UDATA);
UDATA cbyteUsed = omrthread_get_stack_usage(vmThread->osThread);
J9JavaVM * vm = vmThread->javaVM;
while (*stackSlot == J9_RUNTIME_STACK_FILL) {
stackSlot++;
nbyteUsed -= sizeof(UDATA);
}
if (vmThread->threadObject) {
char* name = getOMRVMThreadName(vmThread->omrVMThread);
PORT_ACCESS_FROM_JAVAVM(vm);
if(stillRunning == FALSE){
/* J9NLS_VERB_STACK_USAGE=Verbose stack: \"%.*s\" used %zd/%zd bytes on Java/C stacks */
j9nls_printf(PORTLIB, J9NLS_INFO, J9NLS_VERB_STACK_USAGE, strlen(name), name, nbyteUsed, cbyteUsed);
}else{ /*if stillRunning == TRUE*/
/* J9NLS_VERB_STACK_USAGE_FOR_RUNNING_THREADS=Verbose stack: Running \"%2$.*1$s\" is using %3$zd/%4$zd bytes on Java/C stacks*/
j9nls_printf(PORTLIB, J9NLS_INFO, J9NLS_VERB_STACK_USAGE_FOR_RUNNING_THREADS, strlen(name), name, nbyteUsed, cbyteUsed);
}
releaseOMRVMThreadName(vmThread->omrVMThread);
}
if (nbyteUsed > vm->maxStackUse) vm->maxStackUse = nbyteUsed;
if (cbyteUsed > vm->maxCStackUse) vm->maxCStackUse = cbyteUsed;
}
/**
* @internal
*
* Detect -Xipt and prevent enablement of iconv converter initialization
* in portlibrary.
*
* @return 0 if success, 1 otherwise
*/
static UDATA
setGlobalConvertersAware(J9JavaVM *vm)
{
UDATA rc = 0;
if ((FIND_AND_CONSUME_VMARG(EXACT_MATCH, VMOPT_XIPT, NULL)) >= 0) {
/* -Xipt detected. Prevent enablement of cached UTF8 converters. */
rc = 0;
}
#if defined(J9VM_USE_ICONV) || defined(J9ZOS390)
{
PORT_ACCESS_FROM_JAVAVM(vm);
rc = j9port_control(J9PORT_CTLDATA_NOIPT, 1);
}
#endif
return rc;
}
void OMRNORETURN
exitJavaVM(J9VMThread * vmThread, IDATA rc)
{
J9JavaVM *vm = NULL;
/* if no VM is specified, just try to exit from the first VM.
* Arguably, we should shutdown ALL the VMs.
*/
if (vmThread == NULL) {
jint nVMs = 0;
if (JNI_OK == J9_GetCreatedJavaVMs((JavaVM **)&vm, 1, &nVMs)) {
if (nVMs == 1) {
vmThread = currentVMThread(vm);
}
}
} else {
vm = vmThread->javaVM;
if ((vm->runtimeFlags & J9_RUNTIME_REPORT_STACK_USE) && vmThread->stackObject && (vm->verboseLevel & VERBOSE_STACK)) {
print_verbose_stackusage_of_nonsystem_threads(vmThread);
print_verbose_stackUsage(vmThread, FALSE);
}
}
if (vm != NULL) {
PORT_ACCESS_FROM_JAVAVM(vm);
#if defined(J9VM_INTERP_ATOMIC_FREE_JNI)
/* exitJavaVM is always called from a JNI context */
enterVMFromJNI(vmThread);
releaseVMAccess(vmThread);
#endif /* J9VM_INTERP_ATOMIC_FREE_JNI */
/* we only let the shutdown code run once */
if(vm->runtimeFlagsMutex != NULL) {
omrthread_monitor_enter(vm->runtimeFlagsMutex);
}
if(vm->runtimeFlags & J9_RUNTIME_EXIT_STARTED) {
if (vm->runtimeFlagsMutex != NULL) {
omrthread_monitor_exit(vm->runtimeFlagsMutex);
}
if (vmThread->publicFlags & J9_PUBLIC_FLAGS_VM_ACCESS) {
internalReleaseVMAccess(vmThread);
}
/* Do nothing. Wait for the process to exit. */
while (1) {
omrthread_suspend();
}
}
vm->runtimeFlags |= J9_RUNTIME_EXIT_STARTED;
if(vm->runtimeFlagsMutex != NULL) {
omrthread_monitor_exit(vm->runtimeFlagsMutex);
}
#ifdef J9VM_OPT_SIDECAR
if (vm->sidecarExitHook)
(*(vm->sidecarExitHook))(vm);
#endif
#ifdef J9VM_PROF_COUNT_ARGS_TEMPS
report(vm);
#endif
if (vmThread) {
/* we can only perform these shutdown steps if the current thread is attached */
TRIGGER_J9HOOK_VM_SHUTTING_DOWN(vm->hookInterface, vmThread, rc);
}
/* exitJavaVM runs special exit stage, but doesn't close the libraries or deallocate the VM thread */
runExitStages(vm, vmThread);
/* Acquire exclusive VM access to bring all threads to a safe
* point before shutting down. This prevents intermittent crashes (particularly
* in the GC) when attempting to access the entryLocalStorage on the native
* stack of a thread that the OS is in the process of destroying.
*
* This is safe from deadlock with the exclusive access in DestroyJavaVM because
* J9_RUNTIME_EXIT_STARTED is set in DestroyJavaVM before acquiring exclusive
* access. This function has already checked that J9_RUNTIME_EXIT_STARTED was not
* set before reaching this point.
*
* In rare cases, the VM may fatal exit while holding exclusive access, so don't attempt to
* acquire it if another thread already has it.
*/
if (J9_XACCESS_NONE == vm->exclusiveAccessState) {
internalAcquireVMAccess(vmThread);
acquireExclusiveVMAccess(vmThread);
}
#if defined(WIN32)
/* Do not attempt to exit while a JNI shared library open is in progress */
omrthread_monitor_enter(vm->classLoaderBlocksMutex);
#endif
#if defined(COUNT_BYTECODE_PAIRS)
printBytecodePairs(vm);
#endif /* COUNT_BYTECODE_PAIRS */
#ifdef J9ZTPF
/* run z/TPF OS exit hook */
cjvm_jvm_shutdown_hook();
#endif
if (vm->exitHook) {
#if defined(J9VM_ZOS_3164_INTEROPERABILITY)
if (J9_IS_31BIT_INTEROP_TARGET(vm->exitHook)) {
execute31BitExitHook(vm, (jint) rc);
} else
#endif /* defined(J9VM_ZOS_3164_INTEROPERABILITY) */
{
vm->exitHook((jint) rc);
}
}
j9exit_shutdown_and_exit((I_32) rc);
}
/* If we got here, then either we couldn't find a VM(!) or j9exit_shutdown_and_exit() returned(!)
* Neither of those scenarios should be possible
* But if somehow it does happen, we don't have many options here!
* We can't even print a message, since we don't have a port library.
*/
exit( (int)rc );
dontreturn: goto dontreturn; /* avoid warnings */
}
#if defined(J9VM_INTERP_CUSTOM_SPIN_OPTIONS)
static void
cleanCustomSpinOptions(void *element, void *userData)
{
J9PortLibrary *portLibrary = (J9PortLibrary *)userData;
PORT_ACCESS_FROM_PORT(portLibrary);
J9VMCustomSpinOptions *option = (J9VMCustomSpinOptions *)element;
j9mem_free_memory((char *)option->className);
}
#endif /* J9VM_INTERP_CUSTOM_SPIN_OPTIONS */
#if defined(J9VM_OPT_JITSERVER)
BOOLEAN
isJITServerEnabled(J9JavaVM *vm)
{
return J9_ARE_ALL_BITS_SET(vm->extendedRuntimeFlags2, J9_EXTENDED_RUNTIME2_ENABLE_START_JITSERVER);
}
#endif /* J9VM_OPT_JITSERVER */
void
freeJavaVM(J9JavaVM * vm)
{
BOOLEAN hotReferenceFieldRequired = FALSE;
J9PortLibrary *tmpLib = NULL;
PORT_ACCESS_FROM_JAVAVM(vm);
J9VMThread *currentThread = currentVMThread(vm);
IDATA traceDescriptor = 0;
#if !defined(WIN32)
j9sig_set_async_signal_handler(sigxfszHandler, NULL, 0);
#endif /* !defined(WIN32) */
#if JAVA_SPEC_VERSION >= 16
if (NULL != vm->cifNativeCalloutDataCache) {
pool_state poolState;
void *cifNode = pool_startDo(vm->cifNativeCalloutDataCache, &poolState);
while (NULL != cifNode) {
freeAllStructFFITypes(currentThread, cifNode);
cifNode = pool_nextDo(&poolState);
}
pool_kill(vm->cifNativeCalloutDataCache);
vm->cifNativeCalloutDataCache = NULL;
}
if (NULL != vm->cifArgumentTypesCache) {
pool_state poolState;
J9CifArgumentTypes *cifArgTypesNode = pool_startDo(vm->cifArgumentTypesCache, &poolState);
while (NULL != cifArgTypesNode) {
j9mem_free_memory(cifArgTypesNode->argumentTypes);
cifArgTypesNode = pool_nextDo(&poolState);
}
pool_kill(vm->cifArgumentTypesCache);
vm->cifArgumentTypesCache = NULL;
}
/* Empty the thunk heap list by cleaning up all resources created via allocateUpcallThunkMemory,
* including the generated thunk and the corresponding metadata of each entry in the hashtable.
* See UpcallThunkMem.cpp for details.
*/
if (NULL != vm->thunkHeapHead) {
J9UpcallThunkHeapList *thunkHeapHead = vm->thunkHeapHead;
J9UpcallThunkHeapList *thunkHeapNode = NULL;
UDATA byteAmount = j9vmem_supported_page_sizes()[0];
if (NULL != thunkHeapHead->metaDataHashTable) {
J9HashTable *metaDataHashTable = thunkHeapHead->metaDataHashTable;
UDATA entryCount = hashTableGetCount(metaDataHashTable);
if (entryCount > 0) {
hashTableForEachDo(metaDataHashTable, (J9HashTableDoFn)freeUpcallMetaDataDoFn, NULL);
}
hashTableFree(metaDataHashTable);
metaDataHashTable = NULL;
}
thunkHeapNode = thunkHeapHead->next;
thunkHeapHead->next = NULL;
thunkHeapHead = thunkHeapNode;
while (NULL != thunkHeapHead) {
J9UpcallThunkHeapWrapper *thunkHeapWrapper = thunkHeapHead->thunkHeapWrapper;
if (NULL != thunkHeapWrapper) {
J9PortVmemIdentifier vmemID = thunkHeapWrapper->vmemID;
j9vmem_free_memory(vmemID.address, byteAmount, &vmemID);
j9mem_free_memory(thunkHeapWrapper);
thunkHeapWrapper = NULL;
}
thunkHeapNode = thunkHeapHead;
thunkHeapHead = thunkHeapHead->next;
j9mem_free_memory(thunkHeapNode);
}
vm->thunkHeapHead = NULL;
}
#endif /* JAVA_SPEC_VERSION >= 16 */
/* Remove the predefinedHandlerWrapper. */
j9sig_set_single_async_signal_handler(predefinedHandlerWrapper, vm, 0, NULL);
/* Unload before trace engine exits */
UT_MODULE_UNLOADED(J9_UTINTERFACE_FROM_VM(vm));
if (0 != vm->vmRuntimeStateListener.minIdleWaitTime) {
stopVMRuntimeStateListener(vm);
}
if (NULL != vm->dllLoadTable) {
runShutdownStage(vm, INTERPRETER_SHUTDOWN, NULL, 0);
}
/* Kill global hot field class info pool and its monitor if dynamicBreadthFirstScanOrdering is enabled */
if (NULL != vm->memoryManagerFunctions) {
hotReferenceFieldRequired = vm->memoryManagerFunctions->j9gc_hot_reference_field_required(vm);
if (hotReferenceFieldRequired && NULL != vm->hotFieldClassInfoPool) {
pool_kill(vm->hotFieldClassInfoPool);
vm->hotFieldClassInfoPool = NULL;
}
if (hotReferenceFieldRequired && NULL != vm->hotFieldClassInfoPoolMutex) {
omrthread_monitor_destroy(vm->hotFieldClassInfoPoolMutex);
}
if (hotReferenceFieldRequired && NULL != vm->globalHotFieldPoolMutex) {
omrthread_monitor_destroy(vm->globalHotFieldPoolMutex);
}
}
if (NULL != vm->classMemorySegments) {
J9ClassWalkState classWalkState;
J9Class * clazz;
clazz = allClassesStartDo(&classWalkState, vm, NULL);
while (NULL != clazz) {
j9mem_free_memory(clazz->jniIDs);
clazz->jniIDs = NULL;
clazz = allClassesNextDo(&classWalkState);
}
allClassesEndDo(&classWalkState);
}
if (NULL != vm->classLoaderBlocks) {
pool_state clState = {0};
void *clToFree = NULL;
if (NULL != currentThread) {
internalAcquireVMAccess(currentThread);
}
clToFree = pool_startDo(vm->classLoaderBlocks, &clState);
while (NULL != clToFree) {
void *tmpToFree = NULL;
tmpToFree = clToFree;
clToFree = pool_nextDo(&clState);
freeClassLoader(tmpToFree, vm, currentThread, JNI_TRUE);
}
if (NULL != currentThread) {
internalReleaseVMAccess(currentThread);
}
}
if (NULL != vm->classLoadingConstraints) {
hashTableFree(vm->classLoadingConstraints);
vm->classLoadingConstraints = NULL;
}
#ifdef J9VM_OPT_ZIP_SUPPORT
if (NULL != vm->zipCachePool) {
zipCachePool_kill(vm->zipCachePool);
vm->zipCachePool = NULL;
}
#endif
#if defined(J9VM_INTERP_ATOMIC_FREE_JNI_USES_FLUSH)
shutDownExclusiveAccess(vm);
#endif /* J9VM_INTERP_ATOMIC_FREE_JNI_USES_FLUSH */
freeNativeMethodBindTable(vm);
freeHiddenInstanceFieldsList(vm);
cleanupLockwordConfig(vm);
cleanupEnsureHashedConfig(vm);
destroyJvmInitArgs(vm->portLibrary, vm->vmArgsArray);
vm->vmArgsArray = NULL;
if (NULL != vm->modulesPathEntry) {
j9mem_free_memory(vm->modulesPathEntry);
vm->modulesPathEntry = NULL;
}
if (NULL != vm->unamedModuleForSystemLoader) {
vm->internalVMFunctions->freeJ9Module(vm, vm->unamedModuleForSystemLoader);
vm->unamedModuleForSystemLoader = NULL;
}
if (NULL != vm->modularityPool) {
pool_kill(vm->modularityPool);
vm->modularityPool = NULL;
/* vm->javaBaseModule should have already been freed when vm->systemClassLoader was freed earlier */
vm->javaBaseModule = NULL;
}
if (NULL != vm->jniGlobalReferences) {
pool_kill(vm->jniGlobalReferences);
vm->jniGlobalReferences = NULL;
}
if (NULL != vm->dllLoadTable) {
J9VMDllLoadInfo *traceLoadInfo = NULL;
if (NULL != currentThread) {
/* Send thread destroy event now to free some things before memcheck does the unfreed block scan */
TRIGGER_J9HOOK_VM_THREAD_DESTROY(vm->hookInterface, currentThread);
}
runShutdownStage(vm, LIBRARIES_ONUNLOAD, NULL, 0);
runUnOnloads(vm, FALSE);
runShutdownStage(vm, HEAP_STRUCTURES_FREED, NULL, 0);
if (NULL != currentThread) {
/* No need to worry about the zombie counter at this point */
deallocateVMThread(currentThread, FALSE, FALSE);
}
runShutdownStage(vm, GC_SHUTDOWN_COMPLETE, NULL, 0);
/* zOS: Do not close any of the DLLs. This is necessary
* because we do not know for sure whether all the threads
* that may depend on these DLLs have terminated.
*
* Note that this solution is also suggested in the
* 'z/OS XL C/C++ Programming Guide' V1R13 (Chapter 21
* under the heading 'DLL Restrictions').
*/
#if !defined(J9ZOS390)
closeAllDLLs(vm);
/* Remember the file descriptor of the trace DLL. This has to be closed later than other DLLs. */
traceLoadInfo = FIND_DLL_TABLE_ENTRY(J9_RAS_TRACE_DLL_NAME);
if (NULL != traceLoadInfo) {
traceDescriptor = traceLoadInfo->descriptor;
}
#endif /* !defined(J9ZOS390) */
freeDllLoadTable(vm->dllLoadTable);
vm->dllLoadTable = NULL;
}
/* Detach the VM from OMR */
detachVMFromOMR(vm);
if (NULL != vm->jniWeakGlobalReferences) {
pool_kill(vm->jniWeakGlobalReferences);
vm->jniWeakGlobalReferences = NULL;
}
if (NULL != vm->classLoaderBlocks) {
pool_kill(vm->classLoaderBlocks);
vm->classLoaderBlocks = NULL;
}
if (NULL != vm->classLoadingStackPool) {
pool_kill(vm->classLoadingStackPool);
vm->classLoadingStackPool = NULL;
}
#if defined(J9VM_OPT_VALHALLA_FLATTENABLE_VALUE_TYPES)
if (NULL != vm->valueTypeVerificationStackPool) {
pool_kill(vm->valueTypeVerificationStackPool);
vm->valueTypeVerificationStackPool = NULL;
}
#endif /* defined(J9VM_OPT_VALHALLA_FLATTENABLE_VALUE_TYPES) */
#if JAVA_SPEC_VERSION >= 19
if (NULL != vm->tlsPool) {
pool_kill(vm->tlsPool);
vm->tlsPool = NULL;
}
if (NULL != vm->continuationT2Cache) {
for (U_32 i = 0; i < vm->continuationT2Size; i++) {
if (NULL != vm->continuationT2Cache[i]) {
freeJavaStack(vm, vm->continuationT2Cache[i]->stackObject);
j9mem_free_memory(vm->continuationT2Cache[i]);
}
}
j9mem_free_memory(vm->continuationT2Cache);
}
#endif /* JAVA_SPEC_VERSION >= 19 */
j9mem_free_memory(vm->vTableScratch);
vm->vTableScratch = NULL;
j9mem_free_memory(vm->osrGlobalBuffer);
vm->osrGlobalBuffer = NULL;
#if defined(COUNT_BYTECODE_PAIRS)
freeBytecodePairs(vm);
#endif /* COUNT_BYTECODE_PAIRS */
deleteStatistics(vm);
terminateVMThreading(vm);
tmpLib = vm->portLibrary;
#ifdef J9VM_INTERP_VERBOSE
if (J9_ARE_ANY_BITS_SET(vm->runtimeFlags, J9_RUNTIME_REPORT_STACK_USE)) {
/* J9NLS_VERB_MAX_STACK_USAGE=Verbose stack: maximum stack use was %zd/%zd bytes on Java/C stacks\n */
j9nls_printf(PORTLIB, J9NLS_INFO, J9NLS_VERB_MAX_STACK_USAGE, vm->maxStackUse, vm->maxCStackUse);
}
#endif
#ifdef J9VM_PROF_COUNT_ARGS_TEMPS
report(vm);
#endif
#if defined(J9VM_OPT_SHARED_CLASSES)
if (NULL != vm->sharedClassPreinitConfig) {
j9mem_free_memory(vm->sharedClassPreinitConfig);
vm->sharedClassPreinitConfig = NULL;
}
#endif
#ifdef J9VM_OPT_SIDECAR
if (NULL != vm->jvmExtensionInterface) {
j9mem_free_memory((void*)(vm->jvmExtensionInterface));
vm->jvmExtensionInterface = NULL;
}
#endif
shutdownVMHookInterface(vm);
freeSystemProperties(vm);
if (NULL != vm->j9ras) {
J9RASShutdown(vm);
}
contendedLoadTableFree(vm);
#ifndef J9VM_SIZE_SMALL_CODE
fieldIndexTableFree(vm);
#endif
/* Close the trace DLL. This has to be after all hashtable and pool free events, otherwise we'll crash on pool tracepoints */
if (0 != traceDescriptor) {
j9sl_close_shared_library(traceDescriptor);
}
#if !defined(WIN32)
/* restore any handler we may have overwritten */
if (NULL != vm->originalSIGPIPESignalAction) {
sigaction(SIGPIPE,(struct sigaction *)vm->originalSIGPIPESignalAction, NULL);
j9mem_free_memory(vm->originalSIGPIPESignalAction);
vm->originalSIGPIPESignalAction = NULL;
}
#endif
#if defined(J9VM_INTERP_CUSTOM_SPIN_OPTIONS)
/* Free custom spin options */
if (NULL != vm->customSpinOptions) {
pool_do(vm->customSpinOptions, cleanCustomSpinOptions, (void *)tmpLib);
pool_kill(vm->customSpinOptions);
vm->customSpinOptions = NULL;
}
#endif /* J9VM_INTERP_CUSTOM_SPIN_OPTIONS */
if (NULL != vm->realtimeSizeClasses) {
j9mem_free_memory(vm->realtimeSizeClasses);
vm->realtimeSizeClasses = NULL;
}
#if defined(J9VM_OPT_CRIU_SUPPORT)
{
J9Pool *hookRecords = vm->checkpointState.hookRecords;
J9VMInitArgs *restoreArgsList = vm->checkpointState.restoreArgsList;
J9Pool *classIterationRestoreHookRecords = vm->checkpointState.classIterationRestoreHookRecords;
j9mem_free_memory(vm->checkpointState.restoreArgsChars);
if (NULL != hookRecords) {
pool_kill(hookRecords);
vm->checkpointState.hookRecords = NULL;
}
if (NULL != classIterationRestoreHookRecords) {
pool_kill(classIterationRestoreHookRecords);
vm->checkpointState.classIterationRestoreHookRecords = NULL;
}
j9sl_close_shared_library(vm->checkpointState.libCRIUHandle);
if (NULL != vm->delayedLockingOperationsMutex) {