< prev index next > src/hotspot/share/cds/cdsConfig.cpp
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*/
#include "precompiled.hpp"
#include "cds/archiveHeapLoader.hpp"
#include "cds/cdsConfig.hpp"
#include "cds/classListWriter.hpp"
#include "cds/heapShared.hpp"
#include "classfile/classLoaderDataShared.hpp"
#include "classfile/moduleEntry.hpp"
#include "include/jvm_io.h"
#include "logging/log.hpp"
#include "memory/universe.hpp"
#include "runtime/arguments.hpp"
#include "runtime/java.hpp"
#include "utilities/defaultStream.hpp"
bool CDSConfig::_is_dumping_static_archive = false;
bool CDSConfig::_is_dumping_dynamic_archive = false;
bool CDSConfig::_is_using_optimized_module_handling = true;
bool CDSConfig::_is_dumping_full_module_graph = true;
bool CDSConfig::_is_using_full_module_graph = true;
char* CDSConfig::_default_archive_path = nullptr;
char* CDSConfig::_static_archive_path = nullptr;
char* CDSConfig::_dynamic_archive_path = nullptr;
int CDSConfig::get_status() {
assert(Universe::is_fully_initialized(), "status is finalized only after Universe is initialized");
return (is_dumping_archive() ? IS_DUMPING_ARCHIVE : 0) |
(is_dumping_static_archive() ? IS_DUMPING_STATIC_ARCHIVE : 0) |
(is_logging_lambda_form_invokers() ? IS_LOGGING_LAMBDA_FORM_INVOKERS : 0) |
! (is_using_archive() ? IS_USING_ARCHIVE : 0);
}
void CDSConfig::initialize() {
! if (is_dumping_static_archive()) {
if (RequireSharedSpaces) {
warning("Cannot dump shared archive while using shared archive");
}
UseSharedSpaces = false;
}
*/
#include "precompiled.hpp"
#include "cds/archiveHeapLoader.hpp"
#include "cds/cdsConfig.hpp"
+ #include "cds/cds_globals.hpp"
#include "cds/classListWriter.hpp"
#include "cds/heapShared.hpp"
+ #include "cds/metaspaceShared.hpp"
#include "classfile/classLoaderDataShared.hpp"
#include "classfile/moduleEntry.hpp"
+ #include "classfile/systemDictionaryShared.hpp"
#include "include/jvm_io.h"
#include "logging/log.hpp"
+ #include "prims/jvmtiExport.hpp"
#include "memory/universe.hpp"
#include "runtime/arguments.hpp"
+ #include "runtime/globals_extension.hpp"
#include "runtime/java.hpp"
#include "utilities/defaultStream.hpp"
bool CDSConfig::_is_dumping_static_archive = false;
bool CDSConfig::_is_dumping_dynamic_archive = false;
bool CDSConfig::_is_using_optimized_module_handling = true;
bool CDSConfig::_is_dumping_full_module_graph = true;
bool CDSConfig::_is_using_full_module_graph = true;
+ bool CDSConfig::_has_preloaded_classes = false;
+ bool CDSConfig::_is_loading_invokedynamic = false;
+ bool CDSConfig::_is_loading_packages = false;
char* CDSConfig::_default_archive_path = nullptr;
char* CDSConfig::_static_archive_path = nullptr;
char* CDSConfig::_dynamic_archive_path = nullptr;
int CDSConfig::get_status() {
assert(Universe::is_fully_initialized(), "status is finalized only after Universe is initialized");
return (is_dumping_archive() ? IS_DUMPING_ARCHIVE : 0) |
(is_dumping_static_archive() ? IS_DUMPING_STATIC_ARCHIVE : 0) |
(is_logging_lambda_form_invokers() ? IS_LOGGING_LAMBDA_FORM_INVOKERS : 0) |
! (is_using_archive() ? IS_USING_ARCHIVE : 0) |
+ (is_dumping_heap() ? IS_DUMPING_HEAP : 0) |
+ (is_tracing_dynamic_proxy() ? IS_LOGGING_DYNAMIC_PROXIES : 0) |
+ (is_dumping_packages() ? IS_DUMPING_PACKAGES : 0);
}
void CDSConfig::initialize() {
! if (is_dumping_static_archive() && !is_dumping_final_static_archive()) {
if (RequireSharedSpaces) {
warning("Cannot dump shared archive while using shared archive");
}
UseSharedSpaces = false;
}
cur_path = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal);
strncpy(cur_path, begin_ptr, len + 1);
*top_archive_path = cur_path;
}
+ static void set_new_workflow_default_CachedCodeFile() {
+ size_t len = strlen(CacheDataStore) + 6;
+ char* file = AllocateHeap(len, mtArguments);
+ jio_snprintf(file, len, "%s.code", CacheDataStore);
+ FLAG_SET_ERGO(CachedCodeFile, file);
+ }
+
void CDSConfig::init_shared_archive_paths() {
if (ArchiveClassesAtExit != nullptr) {
assert(!RecordDynamicDumpInfo, "already checked");
if (is_dumping_static_archive()) {
vm_exit_during_initialization("-XX:ArchiveClassesAtExit cannot be used with -Xshare:dump");
if (is_dumping_archive() && archives > 1) {
vm_exit_during_initialization(
"Cannot have more than 1 archive file specified in -XX:SharedArchiveFile during CDS dumping");
}
+ if (CDSPreimage != nullptr && archives > 1) {
+ vm_exit_during_initialization("CDSPreimage must point to a single file", CDSPreimage);
+ }
+
if (is_dumping_static_archive()) {
assert(archives == 1, "must be");
// Static dump is simple: only one archive is allowed in SharedArchiveFile. This file
// will be overwritten no matter regardless of its contents
_static_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments);
if (archives == 1) {
char* base_archive_path = nullptr;
bool success =
FileMapInfo::get_base_archive_name_from_header(SharedArchiveFile, &base_archive_path);
if (!success) {
+ if (CDSPreimage != nullptr) {
+ vm_exit_during_initialization("Unable to map shared spaces from CDSPreimage", CDSPreimage);
+ }
+
// If +AutoCreateSharedArchive and the specified shared archive does not exist,
// regenerate the dynamic archive base on default archive.
if (AutoCreateSharedArchive && !os::file_exists(SharedArchiveFile)) {
enable_dumping_dynamic_archive();
ArchiveClassesAtExit = const_cast<char *>(SharedArchiveFile);
}
return false;
}
bool CDSConfig::check_vm_args_consistency(bool patch_mod_javabase, bool mode_flag_cmd_line) {
if (is_dumping_static_archive()) {
! if (!mode_flag_cmd_line) {
// By default, -Xshare:dump runs in interpreter-only mode, which is required for deterministic archive.
//
// If your classlist is large and you don't care about deterministic dumping, you can use
// -Xshare:dump -Xmixed to improve dumping speed.
Arguments::set_mode_flags(Arguments::_int);
}
return false;
}
bool CDSConfig::check_vm_args_consistency(bool patch_mod_javabase, bool mode_flag_cmd_line) {
+ if (CacheDataStore != nullptr) {
+ if (FLAG_IS_DEFAULT(PreloadSharedClasses)) {
+ // New workflow - enable PreloadSharedClasses by default.
+ // TODO: make new workflow work, even when PreloadSharedClasses is false.
+ //
+ // NOTE: in old workflow, we cannot enable PreloadSharedClasses by default. That
+ // should be an opt-in option, per JEP nnn.
+ FLAG_SET_ERGO(PreloadSharedClasses, true);
+ }
+
+ if (SharedArchiveFile != nullptr) {
+ vm_exit_during_initialization("CacheDataStore and SharedArchiveFile cannot be both specified");
+ }
+ if (!PreloadSharedClasses) {
+ // TODO: in the forked JVM, we should ensure all classes are loaded from the hotspot.cds.preimage.
+ // PreloadSharedClasses only loads the classes for built-in loaders. We need to load the classes
+ // for custom loaders as well.
+ vm_exit_during_initialization("CacheDataStore requires PreloadSharedClasses");
+ }
+
+ if (CDSPreimage == nullptr) {
+ if (os::file_exists(CacheDataStore) /* && TODO: CDS file is valid*/) {
+ // The CacheDataStore is already up to date. Use it. Also turn on cached code by default.
+ SharedArchiveFile = CacheDataStore;
+ FLAG_SET_ERGO_IF_DEFAULT(ReplayTraining, true);
+ FLAG_SET_ERGO_IF_DEFAULT(LoadCachedCode, true);
+ if (LoadCachedCode && FLAG_IS_DEFAULT(CachedCodeFile)) {
+ set_new_workflow_default_CachedCodeFile();
+ }
+ } else {
+ // The preimage dumping phase -- run the app and write the preimage file
+ size_t len = strlen(CacheDataStore) + 10;
+ char* preimage = AllocateHeap(len, mtArguments);
+ jio_snprintf(preimage, len, "%s.preimage", CacheDataStore);
+
+ UseSharedSpaces = false;
+ enable_dumping_static_archive();
+ SharedArchiveFile = preimage;
+ log_info(cds)("CacheDataStore needs to be updated. Writing %s file", SharedArchiveFile);
+
+ // At VM exit, the module graph may be contaminated with program states. We should rebuild the
+ // module graph when dumping the CDS final image.
+ log_info(cds)("full module graph: disabled when writing CDS preimage");
+ HeapShared::disable_writing();
+ stop_dumping_full_module_graph();
+ FLAG_SET_ERGO(ArchiveInvokeDynamic, false);
+ FLAG_SET_ERGO(ArchivePackages, false);
+
+ FLAG_SET_ERGO_IF_DEFAULT(RecordTraining, true);
+ }
+ } else {
+ // The final image dumping phase -- load the preimage and write the final image file
+ SharedArchiveFile = CDSPreimage;
+ UseSharedSpaces = true;
+ log_info(cds)("Generate CacheDataStore %s from CDSPreimage %s", CacheDataStore, CDSPreimage);
+ // Force -Xbatch for AOT compilation.
+ if (FLAG_SET_CMDLINE(BackgroundCompilation, false) != JVMFlag::SUCCESS) {
+ return false;
+ }
+ RecordTraining = false; // This will be updated inside MetaspaceShared::preload_and_dump()
+
+ FLAG_SET_ERGO_IF_DEFAULT(ReplayTraining, true);
+ // Settings for AOT
+ FLAG_SET_ERGO_IF_DEFAULT(StoreCachedCode, true);
+ if (StoreCachedCode && FLAG_IS_DEFAULT(CachedCodeFile)) {
+ set_new_workflow_default_CachedCodeFile();
+ // Cannot dump cached code until metadata and heap are dumped.
+ disable_dumping_cached_code();
+ }
+ }
+ } else {
+ // Old workflow
+ if (CDSPreimage != nullptr) {
+ vm_exit_during_initialization("CDSPreimage must be specified only when CacheDataStore is specified");
+ }
+ }
+
+ if (FLAG_IS_DEFAULT(UsePermanentHeapObjects)) {
+ if (StoreCachedCode || PreloadSharedClasses) {
+ FLAG_SET_ERGO(UsePermanentHeapObjects, true);
+ }
+ }
+
+ if (LoadCachedCode) {
+ // This must be true. Cached code is hard-wired to use permanent objects.
+ UsePermanentHeapObjects = true;
+ }
+
+ if (PreloadSharedClasses) {
+ // If PreloadSharedClasses is specified, enable all these optimizations by default.
+ FLAG_SET_ERGO_IF_DEFAULT(ArchiveDynamicProxies, true);
+ FLAG_SET_ERGO_IF_DEFAULT(ArchiveFieldReferences, true);
+ FLAG_SET_ERGO_IF_DEFAULT(ArchiveInvokeDynamic, true);
+ FLAG_SET_ERGO_IF_DEFAULT(ArchiveLoaderLookupCache, true);
+ FLAG_SET_ERGO_IF_DEFAULT(ArchiveMethodReferences, true);
+ FLAG_SET_ERGO_IF_DEFAULT(ArchivePackages, true);
+ FLAG_SET_ERGO_IF_DEFAULT(ArchiveReflectionData, true);
+ } else {
+ // All of these *might* depend on PreloadSharedClasses. Better be safe than sorry.
+ // TODO: more fine-grained handling.
+ FLAG_SET_ERGO(ArchiveDynamicProxies, false);
+ FLAG_SET_ERGO(ArchiveFieldReferences, false);
+ FLAG_SET_ERGO(ArchiveInvokeDynamic, false);
+ FLAG_SET_ERGO(ArchiveLoaderLookupCache, false);
+ FLAG_SET_ERGO(ArchiveMethodReferences, false);
+ FLAG_SET_ERGO(ArchivePackages, false);
+ FLAG_SET_ERGO(ArchiveReflectionData, false);
+ }
+
if (is_dumping_static_archive()) {
! if (is_dumping_preimage_static_archive() || is_dumping_final_static_archive()) {
+ // Don't tweak execution mode
+ } else if (!mode_flag_cmd_line) {
// By default, -Xshare:dump runs in interpreter-only mode, which is required for deterministic archive.
//
// If your classlist is large and you don't care about deterministic dumping, you can use
// -Xshare:dump -Xmixed to improve dumping speed.
Arguments::set_mode_flags(Arguments::_int);
// String deduplication may cause CDS to iterate the strings in different order from one
// run to another which resulting in non-determinstic CDS archives.
// Disable UseStringDeduplication while dumping CDS archive.
UseStringDeduplication = false;
+
+ Arguments::PropertyList_add(new SystemProperty("java.lang.invoke.MethodHandle.NO_SOFT_CACHE", "true", false));
+ } else {
+ // These flags flag are useful only when dumping static archive (which supports archived heap)
+ ArchiveInvokeDynamic = false;
+ ArchivePackages = false;
}
// RecordDynamicDumpInfo is not compatible with ArchiveClassesAtExit
if (ArchiveClassesAtExit != nullptr && RecordDynamicDumpInfo) {
jio_fprintf(defaultStream::output_stream(),
BytecodeVerificationRemote = true;
log_info(cds)("All non-system classes will be verified (-Xverify:remote) during CDS dump time.");
}
}
return true;
}
bool CDSConfig::is_using_archive() {
return UseSharedSpaces; // TODO: UseSharedSpaces will be eventually replaced by CDSConfig::is_using_archive()
}
bool CDSConfig::is_logging_lambda_form_invokers() {
! return ClassListWriter::is_enabled() || is_dumping_dynamic_archive();
}
void CDSConfig::stop_using_optimized_module_handling() {
_is_using_optimized_module_handling = false;
_is_dumping_full_module_graph = false; // This requires is_using_optimized_module_handling()
_is_using_full_module_graph = false; // This requires is_using_optimized_module_handling()
}
#if INCLUDE_CDS_JAVA_HEAP
bool CDSConfig::is_dumping_heap() {
! // heap dump is not supported in dynamic dump
! return is_dumping_static_archive() && HeapShared::can_write();
}
bool CDSConfig::is_using_full_module_graph() {
if (ClassLoaderDataShared::is_full_module_graph_loaded()) {
return true;
BytecodeVerificationRemote = true;
log_info(cds)("All non-system classes will be verified (-Xverify:remote) during CDS dump time.");
}
}
+ if (!is_dumping_static_archive() || !PreloadSharedClasses) {
+ // FIXME -- is_dumping_heap() is not yet callable from here, as UseG1GC is not yet set by ergo!
+ //
+ // These optimizations require heap dumping and PreloadSharedClasses, or else
+ // the classes of some archived heap objects may be replaced at runtime.
+ ArchiveInvokeDynamic = false;
+ ArchivePackages = false;
+ }
+
+ if (!ArchiveInvokeDynamic) {
+ ArchiveReflectionData = false; // reflection data use LambdaForm classes
+ }
+
return true;
}
+ bool CDSConfig::is_dumping_classic_static_archive() {
+ return _is_dumping_static_archive && CacheDataStore == nullptr && CDSPreimage == nullptr;
+ }
+
+ bool CDSConfig::is_dumping_preimage_static_archive() {
+ return _is_dumping_static_archive && CacheDataStore != nullptr && CDSPreimage == nullptr;
+ }
+
+ bool CDSConfig::is_dumping_final_static_archive() {
+ if (CDSPreimage != nullptr) {
+ assert(CacheDataStore != nullptr, "must be"); // should have been properly initialized by arguments.cpp
+ }
+
+ // Note: _is_dumping_static_archive is false! // FIXME -- refactor this so it makes more sense!
+ return CacheDataStore != nullptr && CDSPreimage != nullptr;
+ }
+
+ bool CDSConfig::is_dumping_regenerated_lambdaform_invokers() {
+ if (is_dumping_final_static_archive()) {
+ // Not yet supported in new workflow -- the training data may point
+ // to a method in a lambdaform holder class that was not regenerated
+ // due to JDK-8318064.
+ return false;
+ } else {
+ return is_dumping_archive();
+ }
+ }
+
+ bool CDSConfig::is_tracing_dynamic_proxy() {
+ return ClassListWriter::is_enabled() || is_dumping_preimage_static_archive();
+ }
+
+ // Preserve all states that were examined used during dumptime verification, such
+ // that the verification result (pass or fail) cannot be changed at runtime.
+ //
+ // For example, if the verification of ik requires that class A must be a subtype of B,
+ // then this relationship between A and B cannot be changed at runtime. I.e., the app
+ // cannot load alternative versions of A and B such that A is not a subtype of B.
+ bool CDSConfig::preserve_all_dumptime_verification_states(const InstanceKlass* ik) {
+ return PreloadSharedClasses && SystemDictionaryShared::is_builtin(ik);
+ }
bool CDSConfig::is_using_archive() {
return UseSharedSpaces; // TODO: UseSharedSpaces will be eventually replaced by CDSConfig::is_using_archive()
}
bool CDSConfig::is_logging_lambda_form_invokers() {
! return ClassListWriter::is_enabled() || is_dumping_dynamic_archive() || is_dumping_preimage_static_archive();
}
void CDSConfig::stop_using_optimized_module_handling() {
_is_using_optimized_module_handling = false;
_is_dumping_full_module_graph = false; // This requires is_using_optimized_module_handling()
_is_using_full_module_graph = false; // This requires is_using_optimized_module_handling()
}
#if INCLUDE_CDS_JAVA_HEAP
bool CDSConfig::is_dumping_heap() {
! return is_dumping_static_archive() && !is_dumping_preimage_static_archive()
! && HeapShared::can_write();
+ }
+
+ bool CDSConfig::is_loading_heap() {
+ return ArchiveHeapLoader::is_in_use();
}
bool CDSConfig::is_using_full_module_graph() {
if (ClassLoaderDataShared::is_full_module_graph_loaded()) {
return true;
if (reason != nullptr) {
log_info(cds)("full module graph cannot be loaded: %s", reason);
}
}
}
+
+ bool CDSConfig::is_loading_invokedynamic() {
+ return UseSharedSpaces && is_loading_heap() && _is_loading_invokedynamic;
+ }
+
+ bool CDSConfig::is_dumping_dynamic_proxy() {
+ return is_dumping_full_module_graph() && is_dumping_invokedynamic();
+ }
+
+ bool CDSConfig::is_initing_classes_at_dump_time() {
+ return is_dumping_heap() && PreloadSharedClasses;
+ }
+
+ bool CDSConfig::is_dumping_invokedynamic() {
+ return ArchiveInvokeDynamic && is_dumping_heap();
+ }
+
+ bool CDSConfig::is_dumping_packages() {
+ return ArchivePackages && is_dumping_heap();
+ }
+
+ bool CDSConfig::is_loading_packages() {
+ return UseSharedSpaces && is_loading_heap() && _is_loading_packages;
+ }
#endif // INCLUDE_CDS_JAVA_HEAP
+
+ // This is allowed by default. We disable it only in the final image dump before the
+ // metadata and heap are dumped.
+ static bool _is_dumping_cached_code = true;
+
+ bool CDSConfig::is_dumping_cached_code() {
+ return _is_dumping_cached_code;
+ }
+
+ void CDSConfig::disable_dumping_cached_code() {
+ _is_dumping_cached_code = false;
+ }
+
+ void CDSConfig::enable_dumping_cached_code() {
+ _is_dumping_cached_code = true;
+ }
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