< prev index next > src/hotspot/share/cds/cdsConfig.cpp
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*/
#include "cds/aotLogging.hpp"
#include "cds/archiveHeapLoader.hpp"
#include "cds/cdsConfig.hpp"
+ #include "cds/cds_globals.hpp"
#include "cds/classListWriter.hpp"
#include "cds/filemap.hpp"
#include "cds/heapShared.hpp"
+ #include "cds/metaspaceShared.hpp"
#include "classfile/classLoaderDataShared.hpp"
#include "classfile/moduleEntry.hpp"
+ #include "classfile/systemDictionaryShared.hpp"
+ #include "code/aotCodeCache.hpp"
+ #include "compiler/compilerDefinitions.inline.hpp"
#include "include/jvm_io.h"
#include "logging/log.hpp"
+ #include "prims/jvmtiExport.hpp"
#include "memory/universe.hpp"
#include "prims/jvmtiAgentList.hpp"
#include "runtime/arguments.hpp"
#include "runtime/globals_extension.hpp"
#include "runtime/java.hpp"
bool CDSConfig::_is_dumping_full_module_graph = true;
bool CDSConfig::_is_using_full_module_graph = true;
bool CDSConfig::_has_aot_linked_classes = false;
bool CDSConfig::_is_single_command_training = false;
bool CDSConfig::_has_temp_aot_config_file = false;
+ bool CDSConfig::_is_loading_packages = false;
+ bool CDSConfig::_is_loading_protection_domains = false;
+ bool CDSConfig::_is_security_manager_allowed = false;
bool CDSConfig::_old_cds_flags_used = false;
bool CDSConfig::_new_aot_flags_used = false;
bool CDSConfig::_disable_heap_dumping = false;
const char* CDSConfig::_default_archive_path = nullptr;
assert(Universe::is_fully_initialized(), "status is finalized only after Universe is initialized");
return (is_dumping_archive() ? IS_DUMPING_ARCHIVE : 0) |
(is_dumping_method_handles() ? IS_DUMPING_METHOD_HANDLES : 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);
}
DEBUG_ONLY(static bool _cds_ergo_initialize_started = false);
void CDSConfig::ergo_initialize() {
assert(Universe::is_fully_initialized(), "status is finalized only after Universe is initialized");
return (is_dumping_archive() ? IS_DUMPING_ARCHIVE : 0) |
(is_dumping_method_handles() ? IS_DUMPING_METHOD_HANDLES : 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_logging_dynamic_proxies() ? IS_LOGGING_DYNAMIC_PROXIES : 0) |
+ (is_dumping_packages() ? IS_DUMPING_PACKAGES : 0) |
+ (is_dumping_protection_domains() ? IS_DUMPING_PROTECTION_DOMAINS : 0);
}
DEBUG_ONLY(static bool _cds_ergo_initialize_started = false);
void CDSConfig::ergo_initialize() {
}
if (!is_dumping_heap()) {
_is_dumping_full_module_graph = false;
}
+
+ #ifdef _LP64
+ //
+ // By default, when using AOTClassLinking, use the CompressedOops::HeapBasedNarrowOop
+ // mode so that AOT code can be always work regardless of runtime heap range.
+ //
+ // If you are *absolutely sure* that the CompressedOops::mode() will be the same
+ // between training and production runs (e.g., if you specify -Xmx128m for
+ // both training and production runs, and you know the OS will always reserve
+ // the heap under 4GB), you can explicitly disable this with:
+ // java -XX:+UnlockDiagnosticVMOptions -XX:-UseCompatibleCompressedOops ...
+ // However, this is risky and there's a chance that the production run will be slower
+ // than expected because it is unable to load the AOT code cache.
+ //
+ if (UseCompressedOops && AOTCodeCache::is_caching_enabled()) {
+ FLAG_SET_ERGO_IF_DEFAULT(UseCompatibleCompressedOops, true);
+ } else if (!FLAG_IS_DEFAULT(UseCompatibleCompressedOops)) {
+ FLAG_SET_ERGO(UseCompatibleCompressedOops, false);
+ }
+ #endif // _LP64
}
const char* CDSConfig::default_archive_path() {
// The path depends on UseCompressedOops, etc, which are set by GC ergonomics just
// before CDSConfig::ergo_initialize() is called.
}
}
}
}
+ static char* bad_module_prop_key = nullptr;
+ static char* bad_module_prop_value = nullptr;
+
void CDSConfig::check_internal_module_property(const char* key, const char* value) {
if (Arguments::is_incompatible_cds_internal_module_property(key)) {
stop_using_optimized_module_handling();
+ if (bad_module_prop_key == nullptr) {
+ // We don't want to print an unconditional warning here, as we are still processing the command line.
+ // A later argument may specify something like -Xshare:off, which makes such a warning irrelevant.
+ //
+ // Instead, we save the info so we can warn when necessary: we are doing it only during AOT Cache
+ // creation for now, but could add it to other places.
+ bad_module_prop_key = os::strdup(key);
+ bad_module_prop_value = os::strdup(value);
+ }
aot_log_info(aot)("optimized module handling: disabled due to incompatible property: %s=%s", key, value);
}
}
void CDSConfig::check_incompatible_property(const char* key, const char* value) {
aot_log_info(aot)("full module graph: disabled due to incompatible property: %s=%s", key, value);
break;
}
}
+ // Match the logic in java/lang/System.java, but we need to know this before the System class is initialized.
+ if (strcmp(key, "java.security.manager") == 0) {
+ if (strcmp(value, "disallowed") != 0) {
+ _is_security_manager_allowed = true;
+ }
+ }
}
// Returns any JVM command-line option, such as "--patch-module", that's not supported by CDS.
static const char* find_any_unsupported_module_option() {
// Note that arguments.cpp has translated the command-line options into properties. If we find an
}
setup_compiler_args();
if (AOTClassLinking) {
! // If AOTClassLinking is specified, enable all AOT optimizations by default.
FLAG_SET_ERGO_IF_DEFAULT(AOTInvokeDynamicLinking, true);
} else {
! // AOTInvokeDynamicLinking depends on AOTClassLinking.
FLAG_SET_ERGO(AOTInvokeDynamicLinking, 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.
}
setup_compiler_args();
if (AOTClassLinking) {
! // If AOTClassLinking is specified, enable all these optimizations by default.
FLAG_SET_ERGO_IF_DEFAULT(AOTInvokeDynamicLinking, true);
+ FLAG_SET_ERGO_IF_DEFAULT(ArchiveDynamicProxies, true);
+ FLAG_SET_ERGO_IF_DEFAULT(ArchiveLoaderLookupCache, true);
+ FLAG_SET_ERGO_IF_DEFAULT(ArchivePackages, true);
+ FLAG_SET_ERGO_IF_DEFAULT(ArchiveProtectionDomains, true);
+ FLAG_SET_ERGO_IF_DEFAULT(ArchiveReflectionData, true);
} else {
! // All of these *might* depend on AOTClassLinking. Better be safe than sorry.
FLAG_SET_ERGO(AOTInvokeDynamicLinking, false);
+ FLAG_SET_ERGO(ArchiveDynamicProxies, false);
+ FLAG_SET_ERGO(ArchiveLoaderLookupCache, false);
+ FLAG_SET_ERGO(ArchivePackages, false);
+ FLAG_SET_ERGO(ArchiveProtectionDomains, false);
+ FLAG_SET_ERGO(ArchiveReflectionData, false);
+
+ if (CDSConfig::is_dumping_archive()) {
+ FLAG_SET_ERGO(AOTRecordTraining, false);
+ FLAG_SET_ERGO(AOTReplayTraining, false);
+ AOTCodeCache::disable_caching();
+ }
}
+ #ifdef _WINDOWS
+ // This optimization is not working on Windows for some reason. See JDK-8338604.
+ FLAG_SET_ERGO(ArchiveReflectionData, false);
+ #endif
+
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.
BytecodeVerificationRemote = true;
aot_log_info(aot)("All non-system classes will be verified (-Xverify:remote) during CDS dump time.");
}
}
return true;
}
void CDSConfig::setup_compiler_args() {
! // AOT profiles are supported only in the JEP 483 workflow.
! bool can_dump_profiles = AOTClassLinking && new_aot_flags_used();
! if (is_dumping_preimage_static_archive() && can_dump_profiles) {
// JEP 483 workflow -- training
FLAG_SET_ERGO_IF_DEFAULT(AOTRecordTraining, true);
FLAG_SET_ERGO(AOTReplayTraining, false);
! } else if (is_dumping_final_static_archive() && can_dump_profiles) {
// JEP 483 workflow -- assembly
FLAG_SET_ERGO(AOTRecordTraining, false);
FLAG_SET_ERGO_IF_DEFAULT(AOTReplayTraining, true);
! } else if (is_using_archive() && new_aot_flags_used()) {
// JEP 483 workflow -- production
FLAG_SET_ERGO(AOTRecordTraining, false);
FLAG_SET_ERGO_IF_DEFAULT(AOTReplayTraining, true);
} else {
FLAG_SET_ERGO(AOTReplayTraining, false);
FLAG_SET_ERGO(AOTRecordTraining, false);
}
}
void CDSConfig::prepare_for_dumping() {
assert(CDSConfig::is_dumping_archive(), "sanity");
BytecodeVerificationRemote = true;
aot_log_info(aot)("All non-system classes will be verified (-Xverify:remote) during CDS dump time.");
}
}
+ if (AOTClassLinking) {
+ if (is_dumping_final_static_archive() && !is_dumping_full_module_graph()) {
+ if (bad_module_prop_key != nullptr) {
+ log_warning(cds)("optimized module handling/full module graph: disabled due to incompatible property: %s=%s",
+ bad_module_prop_key, bad_module_prop_value);
+ }
+ vm_exit_during_initialization("AOT cache cannot be created because AOTClassLinking is enabled but full module graph is disabled");
+ }
+ }
+
return true;
}
void CDSConfig::setup_compiler_args() {
! // AOT profiles and AOT-compiled methods are supported only in the JEP 483 workflow.
! bool can_dump_profile_and_compiled_code = !CompilerConfig::is_interpreter_only() && AOTClassLinking && new_aot_flags_used();
+ bool can_use_profile_and_compiled_code = !CompilerConfig::is_interpreter_only() && new_aot_flags_used();
! if (is_dumping_preimage_static_archive() && can_dump_profile_and_compiled_code) {
// JEP 483 workflow -- training
FLAG_SET_ERGO_IF_DEFAULT(AOTRecordTraining, true);
FLAG_SET_ERGO(AOTReplayTraining, false);
! AOTCodeCache::disable_caching();
+ } else if (is_dumping_final_static_archive() && can_dump_profile_and_compiled_code) {
// JEP 483 workflow -- assembly
FLAG_SET_ERGO(AOTRecordTraining, false);
FLAG_SET_ERGO_IF_DEFAULT(AOTReplayTraining, true);
! AOTCodeCache::enable_caching();
+ disable_dumping_aot_code(); // Cannot dump aot code until metadata and heap are dumped.
+ } else if (is_using_archive() && can_use_profile_and_compiled_code) {
// JEP 483 workflow -- production
FLAG_SET_ERGO(AOTRecordTraining, false);
FLAG_SET_ERGO_IF_DEFAULT(AOTReplayTraining, true);
+ AOTCodeCache::enable_caching();
} else {
FLAG_SET_ERGO(AOTReplayTraining, false);
FLAG_SET_ERGO(AOTRecordTraining, false);
+ AOTCodeCache::disable_caching();
}
}
void CDSConfig::prepare_for_dumping() {
assert(CDSConfig::is_dumping_archive(), "sanity");
bool CDSConfig::is_dumping_preimage_static_archive() {
return _is_dumping_preimage_static_archive;
}
+ bool CDSConfig::is_dumping_preimage_static_archive_with_triggers() {
+ return (!FLAG_IS_DEFAULT(AOTEndTrainingOnMethodEntry)) && is_dumping_preimage_static_archive();
+ }
+
bool CDSConfig::is_dumping_final_static_archive() {
return _is_dumping_final_static_archive;
}
void CDSConfig::enable_dumping_dynamic_archive(const char* output_path) {
bool CDSConfig::allow_only_single_java_thread() {
// See comments in JVM_StartThread()
return is_dumping_classic_static_archive() || is_dumping_final_static_archive();
}
+ bool CDSConfig::is_logging_dynamic_proxies() {
+ 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 is_dumping_aot_linked_classes() && SystemDictionaryShared::is_builtin(ik);
+ }
+
bool CDSConfig::is_using_archive() {
return UseSharedSpaces;
}
bool CDSConfig::is_using_only_default_archive() {
strcmp(input_static_archive_path(), default_archive_path()) == 0 &&
input_dynamic_archive_path() == nullptr;
}
bool CDSConfig::is_logging_lambda_form_invokers() {
! return ClassListWriter::is_enabled() || is_dumping_dynamic_archive();
}
bool CDSConfig::is_dumping_regenerated_lambdaform_invokers() {
if (is_dumping_final_static_archive()) {
// No need to regenerate -- the lambda form invokers should have been regenerated
strcmp(input_static_archive_path(), default_archive_path()) == 0 &&
input_dynamic_archive_path() == nullptr;
}
bool CDSConfig::is_logging_lambda_form_invokers() {
! return ClassListWriter::is_enabled() || is_dumping_dynamic_archive() || is_dumping_preimage_static_archive();
}
bool CDSConfig::is_dumping_regenerated_lambdaform_invokers() {
if (is_dumping_final_static_archive()) {
// No need to regenerate -- the lambda form invokers should have been regenerated
// Make sure we have the exact same module graph as in the assembly phase, or else
// some aot-linked classes may not be visible so cannot be loaded.
return is_using_full_module_graph() && _has_aot_linked_classes;
}
+ bool CDSConfig::is_dumping_dynamic_proxies() {
+ return is_dumping_full_module_graph() && is_dumping_invokedynamic() && ArchiveDynamicProxies;
+ }
+
void CDSConfig::set_has_aot_linked_classes(bool has_aot_linked_classes) {
_has_aot_linked_classes |= has_aot_linked_classes;
}
bool CDSConfig::is_initing_classes_at_dump_time() {
// Requires is_dumping_aot_linked_classes(). Otherwise the classes of some archived heap
// objects used by the archive indy callsites may be replaced at runtime.
return AOTInvokeDynamicLinking && is_dumping_aot_linked_classes() && is_dumping_heap();
}
+ bool CDSConfig::is_dumping_packages() {
+ return ArchivePackages && is_dumping_heap();
+ }
+
+ bool CDSConfig::is_loading_packages() {
+ return UseSharedSpaces && is_using_full_module_graph() && _is_loading_packages;
+ }
+
+ bool CDSConfig::is_dumping_protection_domains() {
+ if (_is_security_manager_allowed) {
+ // For sanity, don't archive PDs. TODO: can this be relaxed?
+ return false;
+ }
+ // Archived PDs for the modules will reference their java.lang.Module, which must
+ // also be archived.
+ return ArchiveProtectionDomains && is_dumping_full_module_graph();
+ }
+
+ bool CDSConfig::is_loading_protection_domains() {
+ if (_is_security_manager_allowed) {
+ // For sanity, don't used any archived PDs. TODO: can this be relaxed?
+ return false;
+ }
+ return UseSharedSpaces && is_using_full_module_graph() && _is_loading_protection_domains;
+ }
+
+ bool CDSConfig::is_dumping_reflection_data() {
+ // reflection data use LambdaForm classes
+ return ArchiveReflectionData && is_dumping_invokedynamic();
+ }
+
// When we are dumping aot-linked classes and we are able to write archived heap objects, we automatically
// enable the archiving of MethodHandles. This will in turn enable the archiving of MethodTypes and hidden
// classes that are used in the implementation of MethodHandles.
// Archived MethodHandles are required for higher-level optimizations such as AOT resolution of invokedynamic
// and dynamic proxies.
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