4067 lines
150 KiB
C++
4067 lines
150 KiB
C++
/*
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* Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "cds/aotLogging.hpp"
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#include "cds/cds_globals.hpp"
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#include "cds/cdsConfig.hpp"
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#include "classfile/classLoader.hpp"
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#include "classfile/javaAssertions.hpp"
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#include "classfile/moduleEntry.hpp"
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#include "classfile/stringTable.hpp"
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#include "classfile/symbolTable.hpp"
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#include "compiler/compilerDefinitions.hpp"
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#include "gc/shared/gcArguments.hpp"
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#include "gc/shared/gcConfig.hpp"
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#include "gc/shared/genArguments.hpp"
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#include "gc/shared/stringdedup/stringDedup.hpp"
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#include "gc/shared/tlab_globals.hpp"
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#include "jvm.h"
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#include "logging/log.hpp"
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#include "logging/logConfiguration.hpp"
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#include "logging/logStream.hpp"
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#include "logging/logTag.hpp"
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#include "memory/allocation.inline.hpp"
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#include "nmt/nmtCommon.hpp"
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#include "oops/compressedKlass.hpp"
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#include "oops/instanceKlass.hpp"
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#include "oops/objLayout.hpp"
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#include "oops/oop.inline.hpp"
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#include "prims/jvmtiAgentList.hpp"
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#include "prims/jvmtiExport.hpp"
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#include "runtime/arguments.hpp"
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#include "runtime/flags/jvmFlag.hpp"
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#include "runtime/flags/jvmFlagAccess.hpp"
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#include "runtime/flags/jvmFlagLimit.hpp"
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#include "runtime/globals_extension.hpp"
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#include "runtime/java.hpp"
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#include "runtime/os.hpp"
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#include "runtime/safepoint.hpp"
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#include "runtime/safepointMechanism.hpp"
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#include "runtime/synchronizer.hpp"
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#include "runtime/vm_version.hpp"
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#include "services/management.hpp"
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#include "utilities/align.hpp"
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#include "utilities/checkedCast.hpp"
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#include "utilities/debug.hpp"
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#include "utilities/defaultStream.hpp"
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#include "utilities/macros.hpp"
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#include "utilities/parseInteger.hpp"
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#include "utilities/powerOfTwo.hpp"
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#include "utilities/stringUtils.hpp"
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#include "utilities/systemMemoryBarrier.hpp"
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#if INCLUDE_JFR
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#include "jfr/jfr.hpp"
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#endif
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#include <limits>
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static const char _default_java_launcher[] = "generic";
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#define DEFAULT_JAVA_LAUNCHER _default_java_launcher
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char* Arguments::_jvm_flags_file = nullptr;
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char** Arguments::_jvm_flags_array = nullptr;
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int Arguments::_num_jvm_flags = 0;
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char** Arguments::_jvm_args_array = nullptr;
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int Arguments::_num_jvm_args = 0;
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unsigned int Arguments::_addmods_count = 0;
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#if INCLUDE_JVMCI
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bool Arguments::_jvmci_module_added = false;
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#endif
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char* Arguments::_java_command = nullptr;
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SystemProperty* Arguments::_system_properties = nullptr;
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size_t Arguments::_conservative_max_heap_alignment = 0;
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Arguments::Mode Arguments::_mode = _mixed;
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const char* Arguments::_java_vendor_url_bug = nullptr;
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const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
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bool Arguments::_executing_unit_tests = false;
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// These parameters are reset in method parse_vm_init_args()
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bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
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bool Arguments::_UseOnStackReplacement = UseOnStackReplacement;
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bool Arguments::_BackgroundCompilation = BackgroundCompilation;
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bool Arguments::_ClipInlining = ClipInlining;
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size_t Arguments::_default_SharedBaseAddress = SharedBaseAddress;
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bool Arguments::_enable_preview = false;
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bool Arguments::_has_jdwp_agent = false;
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LegacyGCLogging Arguments::_legacyGCLogging = { nullptr, 0 };
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// These are not set by the JDK's built-in launchers, but they can be set by
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// programs that embed the JVM using JNI_CreateJavaVM. See comments around
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// JavaVMOption in jni.h.
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abort_hook_t Arguments::_abort_hook = nullptr;
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exit_hook_t Arguments::_exit_hook = nullptr;
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vfprintf_hook_t Arguments::_vfprintf_hook = nullptr;
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SystemProperty *Arguments::_sun_boot_library_path = nullptr;
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SystemProperty *Arguments::_java_library_path = nullptr;
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SystemProperty *Arguments::_java_home = nullptr;
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SystemProperty *Arguments::_java_class_path = nullptr;
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SystemProperty *Arguments::_jdk_boot_class_path_append = nullptr;
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SystemProperty *Arguments::_vm_info = nullptr;
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GrowableArray<ModulePatchPath*> *Arguments::_patch_mod_prefix = nullptr;
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PathString *Arguments::_boot_class_path = nullptr;
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bool Arguments::_has_jimage = false;
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char* Arguments::_ext_dirs = nullptr;
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// True if -Xshare:auto option was specified.
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static bool xshare_auto_cmd_line = false;
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// True if -Xint/-Xmixed/-Xcomp were specified
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static bool mode_flag_cmd_line = false;
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struct VMInitArgsGroup {
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const JavaVMInitArgs* _args;
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JVMFlagOrigin _origin;
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};
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bool PathString::set_value(const char *value, AllocFailType alloc_failmode) {
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char* new_value = AllocateHeap(strlen(value)+1, mtArguments, alloc_failmode);
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if (new_value == nullptr) {
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assert(alloc_failmode == AllocFailStrategy::RETURN_NULL, "must be");
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return false;
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}
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if (_value != nullptr) {
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FreeHeap(_value);
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}
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_value = new_value;
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strcpy(_value, value);
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return true;
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}
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void PathString::append_value(const char *value) {
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char *sp;
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size_t len = 0;
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if (value != nullptr) {
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len = strlen(value);
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if (_value != nullptr) {
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len += strlen(_value);
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}
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sp = AllocateHeap(len+2, mtArguments);
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assert(sp != nullptr, "Unable to allocate space for new append path value");
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if (sp != nullptr) {
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if (_value != nullptr) {
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strcpy(sp, _value);
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strcat(sp, os::path_separator());
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strcat(sp, value);
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FreeHeap(_value);
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} else {
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strcpy(sp, value);
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}
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_value = sp;
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}
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}
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}
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PathString::PathString(const char* value) {
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if (value == nullptr) {
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_value = nullptr;
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} else {
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_value = AllocateHeap(strlen(value)+1, mtArguments);
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strcpy(_value, value);
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}
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}
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PathString::~PathString() {
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if (_value != nullptr) {
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FreeHeap(_value);
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_value = nullptr;
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}
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}
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ModulePatchPath::ModulePatchPath(const char* module_name, const char* path) {
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assert(module_name != nullptr && path != nullptr, "Invalid module name or path value");
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size_t len = strlen(module_name) + 1;
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_module_name = AllocateHeap(len, mtInternal);
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strncpy(_module_name, module_name, len); // copy the trailing null
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_path = new PathString(path);
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}
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ModulePatchPath::~ModulePatchPath() {
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if (_module_name != nullptr) {
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FreeHeap(_module_name);
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_module_name = nullptr;
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}
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if (_path != nullptr) {
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delete _path;
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_path = nullptr;
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}
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}
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SystemProperty::SystemProperty(const char* key, const char* value, bool writeable, bool internal) : PathString(value) {
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if (key == nullptr) {
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_key = nullptr;
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} else {
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_key = AllocateHeap(strlen(key)+1, mtArguments);
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strcpy(_key, key);
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}
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_next = nullptr;
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_internal = internal;
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_writeable = writeable;
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}
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// Check if head of 'option' matches 'name', and sets 'tail' to the remaining
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// part of the option string.
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static bool match_option(const JavaVMOption *option, const char* name,
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const char** tail) {
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size_t len = strlen(name);
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if (strncmp(option->optionString, name, len) == 0) {
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*tail = option->optionString + len;
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return true;
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} else {
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return false;
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}
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}
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// Check if 'option' matches 'name'. No "tail" is allowed.
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static bool match_option(const JavaVMOption *option, const char* name) {
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const char* tail = nullptr;
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bool result = match_option(option, name, &tail);
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if (tail != nullptr && *tail == '\0') {
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return result;
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} else {
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return false;
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}
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}
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// Return true if any of the strings in null-terminated array 'names' matches.
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// If tail_allowed is true, then the tail must begin with a colon; otherwise,
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// the option must match exactly.
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static bool match_option(const JavaVMOption* option, const char** names, const char** tail,
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bool tail_allowed) {
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for (/* empty */; *names != nullptr; ++names) {
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if (match_option(option, *names, tail)) {
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if (**tail == '\0' || (tail_allowed && **tail == ':')) {
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return true;
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}
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}
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}
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return false;
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}
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#if INCLUDE_JFR
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static bool _has_jfr_option = false; // is using JFR
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// return true on failure
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static bool match_jfr_option(const JavaVMOption** option) {
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assert((*option)->optionString != nullptr, "invariant");
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char* tail = nullptr;
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if (match_option(*option, "-XX:StartFlightRecording", (const char**)&tail)) {
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_has_jfr_option = true;
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return Jfr::on_start_flight_recording_option(option, tail);
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} else if (match_option(*option, "-XX:FlightRecorderOptions", (const char**)&tail)) {
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_has_jfr_option = true;
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return Jfr::on_flight_recorder_option(option, tail);
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}
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return false;
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}
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bool Arguments::has_jfr_option() {
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return _has_jfr_option;
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}
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#endif
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static void logOption(const char* opt) {
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if (PrintVMOptions) {
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jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt);
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}
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}
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bool needs_module_property_warning = false;
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#define MODULE_PROPERTY_PREFIX "jdk.module."
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#define MODULE_PROPERTY_PREFIX_LEN 11
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#define ADDEXPORTS "addexports"
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#define ADDEXPORTS_LEN 10
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#define ADDREADS "addreads"
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#define ADDREADS_LEN 8
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#define ADDOPENS "addopens"
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#define ADDOPENS_LEN 8
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#define PATCH "patch"
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#define PATCH_LEN 5
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#define ADDMODS "addmods"
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#define ADDMODS_LEN 7
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#define LIMITMODS "limitmods"
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#define LIMITMODS_LEN 9
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#define PATH "path"
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#define PATH_LEN 4
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#define UPGRADE_PATH "upgrade.path"
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#define UPGRADE_PATH_LEN 12
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#define ENABLE_NATIVE_ACCESS "enable.native.access"
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#define ENABLE_NATIVE_ACCESS_LEN 20
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#define ILLEGAL_NATIVE_ACCESS "illegal.native.access"
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#define ILLEGAL_NATIVE_ACCESS_LEN 21
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// Return TRUE if option matches 'property', or 'property=', or 'property.'.
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static bool matches_property_suffix(const char* option, const char* property, size_t len) {
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return ((strncmp(option, property, len) == 0) &&
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(option[len] == '=' || option[len] == '.' || option[len] == '\0'));
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}
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// Return true if property starts with "jdk.module." and its ensuing chars match
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// any of the reserved module properties.
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// property should be passed without the leading "-D".
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bool Arguments::is_internal_module_property(const char* property) {
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return internal_module_property_helper(property, false);
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}
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// Returns true if property is one of those recognized by is_internal_module_property() but
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// is not supported by CDS archived full module graph.
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bool Arguments::is_incompatible_cds_internal_module_property(const char* property) {
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return internal_module_property_helper(property, true);
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}
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bool Arguments::internal_module_property_helper(const char* property, bool check_for_cds) {
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if (strncmp(property, MODULE_PROPERTY_PREFIX, MODULE_PROPERTY_PREFIX_LEN) == 0) {
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const char* property_suffix = property + MODULE_PROPERTY_PREFIX_LEN;
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if (matches_property_suffix(property_suffix, PATCH, PATCH_LEN) ||
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matches_property_suffix(property_suffix, LIMITMODS, LIMITMODS_LEN) ||
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matches_property_suffix(property_suffix, UPGRADE_PATH, UPGRADE_PATH_LEN) ||
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matches_property_suffix(property_suffix, ILLEGAL_NATIVE_ACCESS, ILLEGAL_NATIVE_ACCESS_LEN)) {
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return true;
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}
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if (!check_for_cds) {
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// CDS notes: these properties are supported by CDS archived full module graph.
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if (matches_property_suffix(property_suffix, ADDEXPORTS, ADDEXPORTS_LEN) ||
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matches_property_suffix(property_suffix, ADDOPENS, ADDOPENS_LEN) ||
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matches_property_suffix(property_suffix, ADDREADS, ADDREADS_LEN) ||
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matches_property_suffix(property_suffix, PATH, PATH_LEN) ||
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matches_property_suffix(property_suffix, ADDMODS, ADDMODS_LEN) ||
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matches_property_suffix(property_suffix, ENABLE_NATIVE_ACCESS, ENABLE_NATIVE_ACCESS_LEN)) {
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return true;
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}
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}
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}
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return false;
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}
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// Process java launcher properties.
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void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
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// See if sun.java.launcher is defined.
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// Must do this before setting up other system properties,
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// as some of them may depend on launcher type.
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for (int index = 0; index < args->nOptions; index++) {
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const JavaVMOption* option = args->options + index;
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const char* tail;
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if (match_option(option, "-Dsun.java.launcher=", &tail)) {
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process_java_launcher_argument(tail, option->extraInfo);
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continue;
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}
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if (match_option(option, "-XX:+ExecutingUnitTests")) {
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_executing_unit_tests = true;
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continue;
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}
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}
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}
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// Initialize system properties key and value.
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void Arguments::init_system_properties() {
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// Set up _boot_class_path which is not a property but
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// relies heavily on argument processing and the jdk.boot.class.path.append
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// property. It is used to store the underlying boot class path.
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_boot_class_path = new PathString(nullptr);
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PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
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"Java Virtual Machine Specification", false));
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PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
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PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
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PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false));
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// Initialize the vm.info now, but it will need updating after argument parsing.
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_vm_info = new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true);
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// Following are JVMTI agent writable properties.
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// Properties values are set to nullptr and they are
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// os specific they are initialized in os::init_system_properties_values().
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_sun_boot_library_path = new SystemProperty("sun.boot.library.path", nullptr, true);
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_java_library_path = new SystemProperty("java.library.path", nullptr, true);
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_java_home = new SystemProperty("java.home", nullptr, true);
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_java_class_path = new SystemProperty("java.class.path", "", true);
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// jdk.boot.class.path.append is a non-writeable, internal property.
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// It can only be set by either:
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// - -Xbootclasspath/a:
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// - AddToBootstrapClassLoaderSearch during JVMTI OnLoad phase
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_jdk_boot_class_path_append = new SystemProperty("jdk.boot.class.path.append", nullptr, false, true);
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// Add to System Property list.
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PropertyList_add(&_system_properties, _sun_boot_library_path);
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PropertyList_add(&_system_properties, _java_library_path);
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PropertyList_add(&_system_properties, _java_home);
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PropertyList_add(&_system_properties, _java_class_path);
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PropertyList_add(&_system_properties, _jdk_boot_class_path_append);
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PropertyList_add(&_system_properties, _vm_info);
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// Set OS specific system properties values
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os::init_system_properties_values();
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}
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// Update/Initialize System properties after JDK version number is known
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void Arguments::init_version_specific_system_properties() {
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enum { bufsz = 16 };
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char buffer[bufsz];
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const char* spec_vendor = "Oracle Corporation";
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uint32_t spec_version = JDK_Version::current().major_version();
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jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version);
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PropertyList_add(&_system_properties,
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new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
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PropertyList_add(&_system_properties,
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new SystemProperty("java.vm.specification.version", buffer, false));
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PropertyList_add(&_system_properties,
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new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
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}
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/*
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* -XX argument processing:
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*
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* -XX arguments are defined in several places, such as:
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* globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp.
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* -XX arguments are parsed in parse_argument().
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* -XX argument bounds checking is done in check_vm_args_consistency().
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*
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* Over time -XX arguments may change. There are mechanisms to handle common cases:
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*
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* ALIASED: An option that is simply another name for another option. This is often
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* part of the process of deprecating a flag, but not all aliases need
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* to be deprecated.
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*
|
|
* Create an alias for an option by adding the old and new option names to the
|
|
* "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc).
|
|
*
|
|
* DEPRECATED: An option that is supported, but a warning is printed to let the user know that
|
|
* support may be removed in the future. Both regular and aliased options may be
|
|
* deprecated.
|
|
*
|
|
* Add a deprecation warning for an option (or alias) by adding an entry in the
|
|
* "special_jvm_flags" table and setting the "deprecated_in" field.
|
|
* Often an option "deprecated" in one major release will
|
|
* be made "obsolete" in the next. In this case the entry should also have its
|
|
* "obsolete_in" field set.
|
|
*
|
|
* OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted
|
|
* on the command line. A warning is printed to let the user know that option might not
|
|
* be accepted in the future.
|
|
*
|
|
* Add an obsolete warning for an option by adding an entry in the "special_jvm_flags"
|
|
* table and setting the "obsolete_in" field.
|
|
*
|
|
* EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal
|
|
* to the current JDK version. The system will flatly refuse to admit the existence of
|
|
* the flag. This allows a flag to die automatically over JDK releases.
|
|
*
|
|
* Note that manual cleanup of expired options should be done at major JDK version upgrades:
|
|
* - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables.
|
|
* - Newly obsolete or expired deprecated options should have their global variable
|
|
* definitions removed (from globals.hpp, etc) and related implementations removed.
|
|
*
|
|
* Recommended approach for removing options:
|
|
*
|
|
* To remove options commonly used by customers (e.g. product -XX options), use
|
|
* the 3-step model adding major release numbers to the deprecate, obsolete and expire columns.
|
|
*
|
|
* To remove internal options (e.g. diagnostic, experimental, develop options), use
|
|
* a 2-step model adding major release numbers to the obsolete and expire columns.
|
|
*
|
|
* To change the name of an option, use the alias table as well as a 2-step
|
|
* model adding major release numbers to the deprecate and expire columns.
|
|
* Think twice about aliasing commonly used customer options.
|
|
*
|
|
* There are times when it is appropriate to leave a future release number as undefined.
|
|
*
|
|
* Tests: Aliases should be tested in VMAliasOptions.java.
|
|
* Deprecated options should be tested in VMDeprecatedOptions.java.
|
|
*/
|
|
|
|
// The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The
|
|
// "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both.
|
|
// When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on
|
|
// the command-line as usual, but will issue a warning.
|
|
// When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on
|
|
// the command-line, while issuing a warning and ignoring the flag value.
|
|
// Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the
|
|
// existence of the flag.
|
|
//
|
|
// MANUAL CLEANUP ON JDK VERSION UPDATES:
|
|
// This table ensures that the handling of options will update automatically when the JDK
|
|
// version is incremented, but the source code needs to be cleanup up manually:
|
|
// - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals"
|
|
// variable should be removed, as well as users of the variable.
|
|
// - As "deprecated" options age into "obsolete" options, move the entry into the
|
|
// "Obsolete Flags" section of the table.
|
|
// - All expired options should be removed from the table.
|
|
static SpecialFlag const special_jvm_flags[] = {
|
|
// -------------- Deprecated Flags --------------
|
|
// --- Non-alias flags - sorted by obsolete_in then expired_in:
|
|
{ "AllowRedefinitionToAddDeleteMethods", JDK_Version::jdk(13), JDK_Version::undefined(), JDK_Version::undefined() },
|
|
{ "FlightRecorder", JDK_Version::jdk(13), JDK_Version::undefined(), JDK_Version::undefined() },
|
|
{ "DumpSharedSpaces", JDK_Version::jdk(18), JDK_Version::jdk(19), JDK_Version::undefined() },
|
|
{ "DynamicDumpSharedSpaces", JDK_Version::jdk(18), JDK_Version::jdk(19), JDK_Version::undefined() },
|
|
{ "RequireSharedSpaces", JDK_Version::jdk(18), JDK_Version::jdk(19), JDK_Version::undefined() },
|
|
{ "UseSharedSpaces", JDK_Version::jdk(18), JDK_Version::jdk(19), JDK_Version::undefined() },
|
|
{ "LockingMode", JDK_Version::jdk(24), JDK_Version::jdk(26), JDK_Version::jdk(27) },
|
|
#ifdef _LP64
|
|
{ "UseCompressedClassPointers", JDK_Version::jdk(25), JDK_Version::jdk(26), JDK_Version::undefined() },
|
|
#endif
|
|
// --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in:
|
|
{ "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
|
|
|
|
// -------------- Obsolete Flags - sorted by expired_in --------------
|
|
|
|
#ifdef LINUX
|
|
{ "UseOprofile", JDK_Version::jdk(25), JDK_Version::jdk(26), JDK_Version::jdk(27) },
|
|
#endif
|
|
{ "MetaspaceReclaimPolicy", JDK_Version::undefined(), JDK_Version::jdk(21), JDK_Version::undefined() },
|
|
{ "ZGenerational", JDK_Version::jdk(23), JDK_Version::jdk(24), JDK_Version::undefined() },
|
|
{ "ZMarkStackSpaceLimit", JDK_Version::undefined(), JDK_Version::jdk(25), JDK_Version::undefined() },
|
|
#if defined(AARCH64)
|
|
{ "NearCpool", JDK_Version::undefined(), JDK_Version::jdk(25), JDK_Version::undefined() },
|
|
#endif
|
|
|
|
#ifdef ASSERT
|
|
{ "DummyObsoleteTestFlag", JDK_Version::undefined(), JDK_Version::jdk(18), JDK_Version::undefined() },
|
|
#endif
|
|
|
|
#ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS
|
|
// These entries will generate build errors. Their purpose is to test the macros.
|
|
{ "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() },
|
|
{ "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) },
|
|
{ "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) },
|
|
{ "obs > exp", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::jdk(10) },
|
|
{ "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) },
|
|
{ "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
|
|
{ "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
|
|
#endif
|
|
|
|
{ nullptr, JDK_Version(0), JDK_Version(0) }
|
|
};
|
|
|
|
// Flags that are aliases for other flags.
|
|
typedef struct {
|
|
const char* alias_name;
|
|
const char* real_name;
|
|
} AliasedFlag;
|
|
|
|
static AliasedFlag const aliased_jvm_flags[] = {
|
|
{ "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" },
|
|
{ nullptr, nullptr}
|
|
};
|
|
|
|
// Return true if "v" is less than "other", where "other" may be "undefined".
|
|
static bool version_less_than(JDK_Version v, JDK_Version other) {
|
|
assert(!v.is_undefined(), "must be defined");
|
|
if (!other.is_undefined() && v.compare(other) >= 0) {
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) {
|
|
for (size_t i = 0; special_jvm_flags[i].name != nullptr; i++) {
|
|
if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
|
|
flag = special_jvm_flags[i];
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) {
|
|
assert(version != nullptr, "Must provide a version buffer");
|
|
SpecialFlag flag;
|
|
if (lookup_special_flag(flag_name, flag)) {
|
|
if (!flag.obsolete_in.is_undefined()) {
|
|
if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
|
|
*version = flag.obsolete_in;
|
|
// This flag may have been marked for obsoletion in this version, but we may not
|
|
// have actually removed it yet. Rather than ignoring it as soon as we reach
|
|
// this version we allow some time for the removal to happen. So if the flag
|
|
// still actually exists we process it as normal, but issue an adjusted warning.
|
|
const JVMFlag *real_flag = JVMFlag::find_declared_flag(flag_name);
|
|
if (real_flag != nullptr) {
|
|
char version_str[256];
|
|
version->to_string(version_str, sizeof(version_str));
|
|
warning("Temporarily processing option %s; support is scheduled for removal in %s",
|
|
flag_name, version_str);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) {
|
|
assert(version != nullptr, "Must provide a version buffer");
|
|
SpecialFlag flag;
|
|
if (lookup_special_flag(flag_name, flag)) {
|
|
if (!flag.deprecated_in.is_undefined()) {
|
|
if (version_less_than(JDK_Version::current(), flag.obsolete_in) &&
|
|
version_less_than(JDK_Version::current(), flag.expired_in)) {
|
|
*version = flag.deprecated_in;
|
|
return 1;
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
const char* Arguments::real_flag_name(const char *flag_name) {
|
|
for (size_t i = 0; aliased_jvm_flags[i].alias_name != nullptr; i++) {
|
|
const AliasedFlag& flag_status = aliased_jvm_flags[i];
|
|
if (strcmp(flag_status.alias_name, flag_name) == 0) {
|
|
return flag_status.real_name;
|
|
}
|
|
}
|
|
return flag_name;
|
|
}
|
|
|
|
#ifdef ASSERT
|
|
static bool lookup_special_flag(const char *flag_name, size_t skip_index) {
|
|
for (size_t i = 0; special_jvm_flags[i].name != nullptr; i++) {
|
|
if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Verifies the correctness of the entries in the special_jvm_flags table.
|
|
// If there is a semantic error (i.e. a bug in the table) such as the obsoletion
|
|
// version being earlier than the deprecation version, then a warning is issued
|
|
// and verification fails - by returning false. If it is detected that the table
|
|
// is out of date, with respect to the current version, then ideally a warning is
|
|
// issued but verification does not fail. This allows the VM to operate when the
|
|
// version is first updated, without needing to update all the impacted flags at
|
|
// the same time. In practice we can't issue the warning immediately when the version
|
|
// is updated as it occurs for every test and some tests are not prepared to handle
|
|
// unexpected output - see 8196739. Instead we only check if the table is up-to-date
|
|
// if the check_globals flag is true, and in addition allow a grace period and only
|
|
// check for stale flags when we hit build 25 (which is far enough into the 6 month
|
|
// release cycle that all flag updates should have been processed, whilst still
|
|
// leaving time to make the change before RDP2).
|
|
// We use a gtest to call this, passing true, so that we can detect stale flags before
|
|
// the end of the release cycle.
|
|
|
|
static const int SPECIAL_FLAG_VALIDATION_BUILD = 25;
|
|
|
|
bool Arguments::verify_special_jvm_flags(bool check_globals) {
|
|
bool success = true;
|
|
for (size_t i = 0; special_jvm_flags[i].name != nullptr; i++) {
|
|
const SpecialFlag& flag = special_jvm_flags[i];
|
|
if (lookup_special_flag(flag.name, i)) {
|
|
warning("Duplicate special flag declaration \"%s\"", flag.name);
|
|
success = false;
|
|
}
|
|
if (flag.deprecated_in.is_undefined() &&
|
|
flag.obsolete_in.is_undefined()) {
|
|
warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name);
|
|
success = false;
|
|
}
|
|
|
|
if (!flag.deprecated_in.is_undefined()) {
|
|
if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) {
|
|
warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name);
|
|
success = false;
|
|
}
|
|
|
|
if (!version_less_than(flag.deprecated_in, flag.expired_in)) {
|
|
warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name);
|
|
success = false;
|
|
}
|
|
}
|
|
|
|
if (!flag.obsolete_in.is_undefined()) {
|
|
if (!version_less_than(flag.obsolete_in, flag.expired_in)) {
|
|
warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name);
|
|
success = false;
|
|
}
|
|
|
|
// if flag has become obsolete it should not have a "globals" flag defined anymore.
|
|
if (check_globals && VM_Version::vm_build_number() >= SPECIAL_FLAG_VALIDATION_BUILD &&
|
|
!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
|
|
if (JVMFlag::find_declared_flag(flag.name) != nullptr) {
|
|
warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name);
|
|
success = false;
|
|
}
|
|
}
|
|
|
|
} else if (!flag.expired_in.is_undefined()) {
|
|
warning("Special flag entry \"%s\" must be explicitly obsoleted before expired.", flag.name);
|
|
success = false;
|
|
}
|
|
|
|
if (!flag.expired_in.is_undefined()) {
|
|
// if flag has become expired it should not have a "globals" flag defined anymore.
|
|
if (check_globals && VM_Version::vm_build_number() >= SPECIAL_FLAG_VALIDATION_BUILD &&
|
|
!version_less_than(JDK_Version::current(), flag.expired_in)) {
|
|
if (JVMFlag::find_declared_flag(flag.name) != nullptr) {
|
|
warning("Global variable for expired flag entry \"%s\" should be removed", flag.name);
|
|
success = false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return success;
|
|
}
|
|
#endif
|
|
|
|
bool Arguments::atojulong(const char *s, julong* result) {
|
|
return parse_integer(s, result);
|
|
}
|
|
|
|
Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size, julong max_size) {
|
|
if (size < min_size) return arg_too_small;
|
|
if (size > max_size) return arg_too_big;
|
|
return arg_in_range;
|
|
}
|
|
|
|
// Describe an argument out of range error
|
|
void Arguments::describe_range_error(ArgsRange errcode) {
|
|
switch(errcode) {
|
|
case arg_too_big:
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"The specified size exceeds the maximum "
|
|
"representable size.\n");
|
|
break;
|
|
case arg_too_small:
|
|
case arg_unreadable:
|
|
case arg_in_range:
|
|
// do nothing for now
|
|
break;
|
|
default:
|
|
ShouldNotReachHere();
|
|
}
|
|
}
|
|
|
|
static bool set_bool_flag(JVMFlag* flag, bool value, JVMFlagOrigin origin) {
|
|
if (JVMFlagAccess::set_bool(flag, &value, origin) == JVMFlag::SUCCESS) {
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool set_fp_numeric_flag(JVMFlag* flag, const char* value, JVMFlagOrigin origin) {
|
|
// strtod allows leading whitespace, but our flag format does not.
|
|
if (*value == '\0' || isspace((unsigned char) *value)) {
|
|
return false;
|
|
}
|
|
char* end;
|
|
errno = 0;
|
|
double v = strtod(value, &end);
|
|
if ((errno != 0) || (*end != 0)) {
|
|
return false;
|
|
}
|
|
if (g_isnan(v) || !g_isfinite(v)) {
|
|
// Currently we cannot handle these special values.
|
|
return false;
|
|
}
|
|
|
|
if (JVMFlagAccess::set_double(flag, &v, origin) == JVMFlag::SUCCESS) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool set_numeric_flag(JVMFlag* flag, const char* value, JVMFlagOrigin origin) {
|
|
JVMFlag::Error result = JVMFlag::WRONG_FORMAT;
|
|
|
|
if (flag->is_int()) {
|
|
int v;
|
|
if (parse_integer(value, &v)) {
|
|
result = JVMFlagAccess::set_int(flag, &v, origin);
|
|
}
|
|
} else if (flag->is_uint()) {
|
|
uint v;
|
|
if (parse_integer(value, &v)) {
|
|
result = JVMFlagAccess::set_uint(flag, &v, origin);
|
|
}
|
|
} else if (flag->is_intx()) {
|
|
intx v;
|
|
if (parse_integer(value, &v)) {
|
|
result = JVMFlagAccess::set_intx(flag, &v, origin);
|
|
}
|
|
} else if (flag->is_uintx()) {
|
|
uintx v;
|
|
if (parse_integer(value, &v)) {
|
|
result = JVMFlagAccess::set_uintx(flag, &v, origin);
|
|
}
|
|
} else if (flag->is_uint64_t()) {
|
|
uint64_t v;
|
|
if (parse_integer(value, &v)) {
|
|
result = JVMFlagAccess::set_uint64_t(flag, &v, origin);
|
|
}
|
|
} else if (flag->is_size_t()) {
|
|
size_t v;
|
|
if (parse_integer(value, &v)) {
|
|
result = JVMFlagAccess::set_size_t(flag, &v, origin);
|
|
}
|
|
}
|
|
|
|
return result == JVMFlag::SUCCESS;
|
|
}
|
|
|
|
static bool set_string_flag(JVMFlag* flag, const char* value, JVMFlagOrigin origin) {
|
|
if (value[0] == '\0') {
|
|
value = nullptr;
|
|
}
|
|
if (JVMFlagAccess::set_ccstr(flag, &value, origin) != JVMFlag::SUCCESS) return false;
|
|
// Contract: JVMFlag always returns a pointer that needs freeing.
|
|
FREE_C_HEAP_ARRAY(char, value);
|
|
return true;
|
|
}
|
|
|
|
static bool append_to_string_flag(JVMFlag* flag, const char* new_value, JVMFlagOrigin origin) {
|
|
const char* old_value = "";
|
|
if (JVMFlagAccess::get_ccstr(flag, &old_value) != JVMFlag::SUCCESS) return false;
|
|
size_t old_len = old_value != nullptr ? strlen(old_value) : 0;
|
|
size_t new_len = strlen(new_value);
|
|
const char* value;
|
|
char* free_this_too = nullptr;
|
|
if (old_len == 0) {
|
|
value = new_value;
|
|
} else if (new_len == 0) {
|
|
value = old_value;
|
|
} else {
|
|
size_t length = old_len + 1 + new_len + 1;
|
|
char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments);
|
|
// each new setting adds another LINE to the switch:
|
|
jio_snprintf(buf, length, "%s\n%s", old_value, new_value);
|
|
value = buf;
|
|
free_this_too = buf;
|
|
}
|
|
(void) JVMFlagAccess::set_ccstr(flag, &value, origin);
|
|
// JVMFlag always returns a pointer that needs freeing.
|
|
FREE_C_HEAP_ARRAY(char, value);
|
|
// JVMFlag made its own copy, so I must delete my own temp. buffer.
|
|
FREE_C_HEAP_ARRAY(char, free_this_too);
|
|
return true;
|
|
}
|
|
|
|
const char* Arguments::handle_aliases_and_deprecation(const char* arg) {
|
|
const char* real_name = real_flag_name(arg);
|
|
JDK_Version since = JDK_Version();
|
|
switch (is_deprecated_flag(arg, &since)) {
|
|
case -1: {
|
|
// Obsolete or expired, so don't process normally,
|
|
// but allow for an obsolete flag we're still
|
|
// temporarily allowing.
|
|
if (!is_obsolete_flag(arg, &since)) {
|
|
return real_name;
|
|
}
|
|
// Note if we're not considered obsolete then we can't be expired either
|
|
// as obsoletion must come first.
|
|
return nullptr;
|
|
}
|
|
case 0:
|
|
return real_name;
|
|
case 1: {
|
|
char version[256];
|
|
since.to_string(version, sizeof(version));
|
|
if (real_name != arg) {
|
|
warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.",
|
|
arg, version, real_name);
|
|
} else {
|
|
warning("Option %s was deprecated in version %s and will likely be removed in a future release.",
|
|
arg, version);
|
|
}
|
|
return real_name;
|
|
}
|
|
}
|
|
ShouldNotReachHere();
|
|
return nullptr;
|
|
}
|
|
|
|
#define BUFLEN 255
|
|
|
|
JVMFlag* Arguments::find_jvm_flag(const char* name, size_t name_length) {
|
|
char name_copied[BUFLEN+1];
|
|
if (name[name_length] != 0) {
|
|
if (name_length > BUFLEN) {
|
|
return nullptr;
|
|
} else {
|
|
strncpy(name_copied, name, name_length);
|
|
name_copied[name_length] = '\0';
|
|
name = name_copied;
|
|
}
|
|
}
|
|
|
|
const char* real_name = Arguments::handle_aliases_and_deprecation(name);
|
|
if (real_name == nullptr) {
|
|
return nullptr;
|
|
}
|
|
JVMFlag* flag = JVMFlag::find_flag(real_name);
|
|
return flag;
|
|
}
|
|
|
|
bool Arguments::parse_argument(const char* arg, JVMFlagOrigin origin) {
|
|
bool is_bool = false;
|
|
bool bool_val = false;
|
|
char c = *arg;
|
|
if (c == '+' || c == '-') {
|
|
is_bool = true;
|
|
bool_val = (c == '+');
|
|
arg++;
|
|
}
|
|
|
|
const char* name = arg;
|
|
while (true) {
|
|
c = *arg;
|
|
if (isalnum(c) || (c == '_')) {
|
|
++arg;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
size_t name_len = size_t(arg - name);
|
|
if (name_len == 0) {
|
|
return false;
|
|
}
|
|
|
|
JVMFlag* flag = find_jvm_flag(name, name_len);
|
|
if (flag == nullptr) {
|
|
return false;
|
|
}
|
|
|
|
if (is_bool) {
|
|
if (*arg != 0) {
|
|
// Error -- extra characters such as -XX:+BoolFlag=123
|
|
return false;
|
|
}
|
|
return set_bool_flag(flag, bool_val, origin);
|
|
}
|
|
|
|
if (arg[0] == '=') {
|
|
const char* value = arg + 1;
|
|
if (flag->is_ccstr()) {
|
|
if (flag->ccstr_accumulates()) {
|
|
return append_to_string_flag(flag, value, origin);
|
|
} else {
|
|
return set_string_flag(flag, value, origin);
|
|
}
|
|
} else if (flag->is_double()) {
|
|
return set_fp_numeric_flag(flag, value, origin);
|
|
} else {
|
|
return set_numeric_flag(flag, value, origin);
|
|
}
|
|
}
|
|
|
|
if (arg[0] == ':' && arg[1] == '=') {
|
|
// -XX:Foo:=xxx will reset the string flag to the given value.
|
|
const char* value = arg + 2;
|
|
return set_string_flag(flag, value, origin);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
|
|
assert(bldarray != nullptr, "illegal argument");
|
|
|
|
if (arg == nullptr) {
|
|
return;
|
|
}
|
|
|
|
int new_count = *count + 1;
|
|
|
|
// expand the array and add arg to the last element
|
|
if (*bldarray == nullptr) {
|
|
*bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments);
|
|
} else {
|
|
*bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments);
|
|
}
|
|
(*bldarray)[*count] = os::strdup_check_oom(arg);
|
|
*count = new_count;
|
|
}
|
|
|
|
void Arguments::build_jvm_args(const char* arg) {
|
|
add_string(&_jvm_args_array, &_num_jvm_args, arg);
|
|
}
|
|
|
|
void Arguments::build_jvm_flags(const char* arg) {
|
|
add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
|
|
}
|
|
|
|
// utility function to return a string that concatenates all
|
|
// strings in a given char** array
|
|
const char* Arguments::build_resource_string(char** args, int count) {
|
|
if (args == nullptr || count == 0) {
|
|
return nullptr;
|
|
}
|
|
size_t length = 0;
|
|
for (int i = 0; i < count; i++) {
|
|
length += strlen(args[i]) + 1; // add 1 for a space or null terminating character
|
|
}
|
|
char* s = NEW_RESOURCE_ARRAY(char, length);
|
|
char* dst = s;
|
|
for (int j = 0; j < count; j++) {
|
|
size_t offset = strlen(args[j]) + 1; // add 1 for a space or null terminating character
|
|
jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with null character
|
|
dst += offset;
|
|
length -= offset;
|
|
}
|
|
return (const char*) s;
|
|
}
|
|
|
|
void Arguments::print_on(outputStream* st) {
|
|
st->print_cr("VM Arguments:");
|
|
if (num_jvm_flags() > 0) {
|
|
st->print("jvm_flags: "); print_jvm_flags_on(st);
|
|
st->cr();
|
|
}
|
|
if (num_jvm_args() > 0) {
|
|
st->print("jvm_args: "); print_jvm_args_on(st);
|
|
st->cr();
|
|
}
|
|
st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
|
|
if (_java_class_path != nullptr) {
|
|
char* path = _java_class_path->value();
|
|
size_t len = strlen(path);
|
|
st->print("java_class_path (initial): ");
|
|
// Avoid using st->print_cr() because path length maybe longer than O_BUFLEN.
|
|
if (len == 0) {
|
|
st->print_raw_cr("<not set>");
|
|
} else {
|
|
st->print_raw_cr(path, len);
|
|
}
|
|
}
|
|
st->print_cr("Launcher Type: %s", _sun_java_launcher);
|
|
}
|
|
|
|
void Arguments::print_summary_on(outputStream* st) {
|
|
// Print the command line. Environment variables that are helpful for
|
|
// reproducing the problem are written later in the hs_err file.
|
|
// flags are from setting file
|
|
if (num_jvm_flags() > 0) {
|
|
st->print_raw("Settings File: ");
|
|
print_jvm_flags_on(st);
|
|
st->cr();
|
|
}
|
|
// args are the command line and environment variable arguments.
|
|
st->print_raw("Command Line: ");
|
|
if (num_jvm_args() > 0) {
|
|
print_jvm_args_on(st);
|
|
}
|
|
// this is the classfile and any arguments to the java program
|
|
if (java_command() != nullptr) {
|
|
st->print("%s", java_command());
|
|
}
|
|
st->cr();
|
|
}
|
|
|
|
void Arguments::print_jvm_flags_on(outputStream* st) {
|
|
if (_num_jvm_flags > 0) {
|
|
for (int i=0; i < _num_jvm_flags; i++) {
|
|
st->print("%s ", _jvm_flags_array[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
void Arguments::print_jvm_args_on(outputStream* st) {
|
|
if (_num_jvm_args > 0) {
|
|
for (int i=0; i < _num_jvm_args; i++) {
|
|
st->print("%s ", _jvm_args_array[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool Arguments::process_argument(const char* arg,
|
|
jboolean ignore_unrecognized,
|
|
JVMFlagOrigin origin) {
|
|
JDK_Version since = JDK_Version();
|
|
|
|
if (parse_argument(arg, origin)) {
|
|
return true;
|
|
}
|
|
|
|
// Determine if the flag has '+', '-', or '=' characters.
|
|
bool has_plus_minus = (*arg == '+' || *arg == '-');
|
|
const char* const argname = has_plus_minus ? arg + 1 : arg;
|
|
|
|
size_t arg_len;
|
|
const char* equal_sign = strchr(argname, '=');
|
|
if (equal_sign == nullptr) {
|
|
arg_len = strlen(argname);
|
|
} else {
|
|
arg_len = equal_sign - argname;
|
|
}
|
|
|
|
// Only make the obsolete check for valid arguments.
|
|
if (arg_len <= BUFLEN) {
|
|
// Construct a string which consists only of the argument name without '+', '-', or '='.
|
|
char stripped_argname[BUFLEN+1]; // +1 for '\0'
|
|
jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0'
|
|
if (is_obsolete_flag(stripped_argname, &since)) {
|
|
char version[256];
|
|
since.to_string(version, sizeof(version));
|
|
warning("Ignoring option %s; support was removed in %s", stripped_argname, version);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// For locked flags, report a custom error message if available.
|
|
// Otherwise, report the standard unrecognized VM option.
|
|
const JVMFlag* found_flag = JVMFlag::find_declared_flag((const char*)argname, arg_len);
|
|
if (found_flag != nullptr) {
|
|
char locked_message_buf[BUFLEN];
|
|
JVMFlag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN);
|
|
if (strlen(locked_message_buf) != 0) {
|
|
#ifdef PRODUCT
|
|
bool mismatched = msg_type == JVMFlag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD;
|
|
if (ignore_unrecognized && mismatched) {
|
|
return true;
|
|
}
|
|
#endif
|
|
jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
|
|
}
|
|
if (found_flag->is_bool() && !has_plus_minus) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Missing +/- setting for VM option '%s'\n", argname);
|
|
} else if (!found_flag->is_bool() && has_plus_minus) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Unexpected +/- setting in VM option '%s'\n", argname);
|
|
} else {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Improperly specified VM option '%s'\n", argname);
|
|
}
|
|
} else {
|
|
if (ignore_unrecognized) {
|
|
return true;
|
|
}
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Unrecognized VM option '%s'\n", argname);
|
|
JVMFlag* fuzzy_matched = JVMFlag::fuzzy_match((const char*)argname, arg_len, true);
|
|
if (fuzzy_matched != nullptr) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Did you mean '%s%s%s'?\n",
|
|
(fuzzy_matched->is_bool()) ? "(+/-)" : "",
|
|
fuzzy_matched->name(),
|
|
(fuzzy_matched->is_bool()) ? "" : "=<value>");
|
|
}
|
|
}
|
|
|
|
// allow for commandline "commenting out" options like -XX:#+Verbose
|
|
return arg[0] == '#';
|
|
}
|
|
|
|
bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
|
|
FILE* stream = os::fopen(file_name, "rb");
|
|
if (stream == nullptr) {
|
|
if (should_exist) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Could not open settings file %s\n", file_name);
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
char token[1024];
|
|
int pos = 0;
|
|
|
|
bool in_white_space = true;
|
|
bool in_comment = false;
|
|
bool in_quote = false;
|
|
int quote_c = 0;
|
|
bool result = true;
|
|
|
|
int c = getc(stream);
|
|
while(c != EOF && pos < (int)(sizeof(token)-1)) {
|
|
if (in_white_space) {
|
|
if (in_comment) {
|
|
if (c == '\n') in_comment = false;
|
|
} else {
|
|
if (c == '#') in_comment = true;
|
|
else if (!isspace((unsigned char) c)) {
|
|
in_white_space = false;
|
|
token[pos++] = checked_cast<char>(c);
|
|
}
|
|
}
|
|
} else {
|
|
if (c == '\n' || (!in_quote && isspace((unsigned char) c))) {
|
|
// token ends at newline, or at unquoted whitespace
|
|
// this allows a way to include spaces in string-valued options
|
|
token[pos] = '\0';
|
|
logOption(token);
|
|
result &= process_argument(token, ignore_unrecognized, JVMFlagOrigin::CONFIG_FILE);
|
|
build_jvm_flags(token);
|
|
pos = 0;
|
|
in_white_space = true;
|
|
in_quote = false;
|
|
} else if (!in_quote && (c == '\'' || c == '"')) {
|
|
in_quote = true;
|
|
quote_c = c;
|
|
} else if (in_quote && (c == quote_c)) {
|
|
in_quote = false;
|
|
} else {
|
|
token[pos++] = checked_cast<char>(c);
|
|
}
|
|
}
|
|
c = getc(stream);
|
|
}
|
|
if (pos > 0) {
|
|
token[pos] = '\0';
|
|
result &= process_argument(token, ignore_unrecognized, JVMFlagOrigin::CONFIG_FILE);
|
|
build_jvm_flags(token);
|
|
}
|
|
fclose(stream);
|
|
return result;
|
|
}
|
|
|
|
//=============================================================================================================
|
|
// Parsing of properties (-D)
|
|
|
|
const char* Arguments::get_property(const char* key) {
|
|
return PropertyList_get_value(system_properties(), key);
|
|
}
|
|
|
|
bool Arguments::add_property(const char* prop, PropertyWriteable writeable, PropertyInternal internal) {
|
|
const char* eq = strchr(prop, '=');
|
|
const char* key;
|
|
const char* value = "";
|
|
|
|
if (eq == nullptr) {
|
|
// property doesn't have a value, thus use passed string
|
|
key = prop;
|
|
} else {
|
|
// property have a value, thus extract it and save to the
|
|
// allocated string
|
|
size_t key_len = eq - prop;
|
|
char* tmp_key = AllocateHeap(key_len + 1, mtArguments);
|
|
|
|
jio_snprintf(tmp_key, key_len + 1, "%s", prop);
|
|
key = tmp_key;
|
|
|
|
value = &prop[key_len + 1];
|
|
}
|
|
|
|
if (internal == ExternalProperty) {
|
|
CDSConfig::check_incompatible_property(key, value);
|
|
}
|
|
|
|
if (strcmp(key, "java.compiler") == 0) {
|
|
// we no longer support java.compiler system property, log a warning and let it get
|
|
// passed to Java, like any other system property
|
|
if (strlen(value) == 0 || strcasecmp(value, "NONE") == 0) {
|
|
// for applications using NONE or empty value, log a more informative message
|
|
warning("The java.compiler system property is obsolete and no longer supported, use -Xint");
|
|
} else {
|
|
warning("The java.compiler system property is obsolete and no longer supported.");
|
|
}
|
|
} else if (strcmp(key, "sun.boot.library.path") == 0) {
|
|
// append is true, writable is true, internal is false
|
|
PropertyList_unique_add(&_system_properties, key, value, AppendProperty,
|
|
WriteableProperty, ExternalProperty);
|
|
} else {
|
|
if (strcmp(key, "sun.java.command") == 0) {
|
|
char *old_java_command = _java_command;
|
|
_java_command = os::strdup_check_oom(value, mtArguments);
|
|
if (old_java_command != nullptr) {
|
|
os::free(old_java_command);
|
|
}
|
|
} else if (strcmp(key, "java.vendor.url.bug") == 0) {
|
|
// If this property is set on the command line then its value will be
|
|
// displayed in VM error logs as the URL at which to submit such logs.
|
|
// Normally the URL displayed in error logs is different from the value
|
|
// of this system property, so a different property should have been
|
|
// used here, but we leave this as-is in case someone depends upon it.
|
|
const char* old_java_vendor_url_bug = _java_vendor_url_bug;
|
|
// save it in _java_vendor_url_bug, so JVM fatal error handler can access
|
|
// its value without going through the property list or making a Java call.
|
|
_java_vendor_url_bug = os::strdup_check_oom(value, mtArguments);
|
|
if (old_java_vendor_url_bug != nullptr) {
|
|
os::free((void *)old_java_vendor_url_bug);
|
|
}
|
|
}
|
|
|
|
// Create new property and add at the end of the list
|
|
PropertyList_unique_add(&_system_properties, key, value, AddProperty, writeable, internal);
|
|
}
|
|
|
|
if (key != prop) {
|
|
// SystemProperty copy passed value, thus free previously allocated
|
|
// memory
|
|
FreeHeap((void *)key);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
//===========================================================================================================
|
|
// Setting int/mixed/comp mode flags
|
|
|
|
void Arguments::set_mode_flags(Mode mode) {
|
|
// Set up default values for all flags.
|
|
// If you add a flag to any of the branches below,
|
|
// add a default value for it here.
|
|
_mode = mode;
|
|
|
|
// Ensure Agent_OnLoad has the correct initial values.
|
|
// This may not be the final mode; mode may change later in onload phase.
|
|
PropertyList_unique_add(&_system_properties, "java.vm.info",
|
|
VM_Version::vm_info_string(), AddProperty, UnwriteableProperty, ExternalProperty);
|
|
|
|
UseInterpreter = true;
|
|
UseCompiler = true;
|
|
UseLoopCounter = true;
|
|
|
|
// Default values may be platform/compiler dependent -
|
|
// use the saved values
|
|
ClipInlining = Arguments::_ClipInlining;
|
|
AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
|
|
UseOnStackReplacement = Arguments::_UseOnStackReplacement;
|
|
BackgroundCompilation = Arguments::_BackgroundCompilation;
|
|
|
|
// Change from defaults based on mode
|
|
switch (mode) {
|
|
default:
|
|
ShouldNotReachHere();
|
|
break;
|
|
case _int:
|
|
UseCompiler = false;
|
|
UseLoopCounter = false;
|
|
AlwaysCompileLoopMethods = false;
|
|
UseOnStackReplacement = false;
|
|
break;
|
|
case _mixed:
|
|
// same as default
|
|
break;
|
|
case _comp:
|
|
UseInterpreter = false;
|
|
BackgroundCompilation = false;
|
|
ClipInlining = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Conflict: required to use shared spaces (-Xshare:on), but
|
|
// incompatible command line options were chosen.
|
|
void Arguments::no_shared_spaces(const char* message) {
|
|
if (RequireSharedSpaces) {
|
|
aot_log_error(aot)("%s is incompatible with other specified options.",
|
|
CDSConfig::new_aot_flags_used() ? "AOT cache" : "CDS");
|
|
if (CDSConfig::new_aot_flags_used()) {
|
|
vm_exit_during_initialization("Unable to use AOT cache", message);
|
|
} else {
|
|
vm_exit_during_initialization("Unable to use shared archive", message);
|
|
}
|
|
} else {
|
|
if (CDSConfig::new_aot_flags_used()) {
|
|
log_warning(aot)("Unable to use AOT cache: %s", message);
|
|
} else {
|
|
aot_log_info(aot)("Unable to use shared archive: %s", message);
|
|
}
|
|
UseSharedSpaces = false;
|
|
}
|
|
}
|
|
|
|
static void set_object_alignment() {
|
|
// Object alignment.
|
|
assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
|
|
MinObjAlignmentInBytes = ObjectAlignmentInBytes;
|
|
assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
|
|
MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
|
|
assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
|
|
MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
|
|
|
|
LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
|
|
LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
|
|
|
|
// Oop encoding heap max
|
|
OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
|
|
}
|
|
|
|
size_t Arguments::max_heap_for_compressed_oops() {
|
|
// Avoid sign flip.
|
|
assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
|
|
// We need to fit both the null page and the heap into the memory budget, while
|
|
// keeping alignment constraints of the heap. To guarantee the latter, as the
|
|
// null page is located before the heap, we pad the null page to the conservative
|
|
// maximum alignment that the GC may ever impose upon the heap.
|
|
size_t displacement_due_to_null_page = align_up(os::vm_page_size(),
|
|
_conservative_max_heap_alignment);
|
|
|
|
LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
|
|
NOT_LP64(ShouldNotReachHere(); return 0);
|
|
}
|
|
|
|
void Arguments::set_use_compressed_oops() {
|
|
#ifdef _LP64
|
|
// MaxHeapSize is not set up properly at this point, but
|
|
// the only value that can override MaxHeapSize if we are
|
|
// to use UseCompressedOops are InitialHeapSize and MinHeapSize.
|
|
size_t max_heap_size = MAX3(MaxHeapSize, InitialHeapSize, MinHeapSize);
|
|
|
|
if (max_heap_size <= max_heap_for_compressed_oops()) {
|
|
if (FLAG_IS_DEFAULT(UseCompressedOops)) {
|
|
FLAG_SET_ERGO(UseCompressedOops, true);
|
|
}
|
|
} else {
|
|
if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
|
|
warning("Max heap size too large for Compressed Oops");
|
|
FLAG_SET_DEFAULT(UseCompressedOops, false);
|
|
}
|
|
}
|
|
#endif // _LP64
|
|
}
|
|
|
|
void Arguments::set_conservative_max_heap_alignment() {
|
|
// The conservative maximum required alignment for the heap is the maximum of
|
|
// the alignments imposed by several sources: any requirements from the heap
|
|
// itself and the maximum page size we may run the VM with.
|
|
size_t heap_alignment = GCConfig::arguments()->conservative_max_heap_alignment();
|
|
_conservative_max_heap_alignment = MAX4(heap_alignment,
|
|
os::vm_allocation_granularity(),
|
|
os::max_page_size(),
|
|
GCArguments::compute_heap_alignment());
|
|
}
|
|
|
|
jint Arguments::set_ergonomics_flags() {
|
|
GCConfig::initialize();
|
|
|
|
set_conservative_max_heap_alignment();
|
|
|
|
#ifdef _LP64
|
|
set_use_compressed_oops();
|
|
|
|
// Also checks that certain machines are slower with compressed oops
|
|
// in vm_version initialization code.
|
|
#endif // _LP64
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
size_t Arguments::limit_heap_by_allocatable_memory(size_t limit) {
|
|
size_t max_allocatable;
|
|
size_t result = limit;
|
|
if (os::has_allocatable_memory_limit(&max_allocatable)) {
|
|
// The AggressiveHeap check is a temporary workaround to avoid calling
|
|
// GCarguments::heap_virtual_to_physical_ratio() before a GC has been
|
|
// selected. This works because AggressiveHeap implies UseParallelGC
|
|
// where we know the ratio will be 1. Once the AggressiveHeap option is
|
|
// removed, this can be cleaned up.
|
|
size_t heap_virtual_to_physical_ratio = (AggressiveHeap ? 1 : GCConfig::arguments()->heap_virtual_to_physical_ratio());
|
|
size_t fraction = MaxVirtMemFraction * heap_virtual_to_physical_ratio;
|
|
result = MIN2(result, max_allocatable / fraction);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
// Use static initialization to get the default before parsing
|
|
static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
|
|
|
|
void Arguments::set_heap_size() {
|
|
julong phys_mem;
|
|
|
|
// If the user specified one of these options, they
|
|
// want specific memory sizing so do not limit memory
|
|
// based on compressed oops addressability.
|
|
// Also, memory limits will be calculated based on
|
|
// available os physical memory, not our MaxRAM limit,
|
|
// unless MaxRAM is also specified.
|
|
bool override_coop_limit = (!FLAG_IS_DEFAULT(MaxRAMPercentage) ||
|
|
!FLAG_IS_DEFAULT(MinRAMPercentage) ||
|
|
!FLAG_IS_DEFAULT(InitialRAMPercentage) ||
|
|
!FLAG_IS_DEFAULT(MaxRAM));
|
|
if (override_coop_limit) {
|
|
if (FLAG_IS_DEFAULT(MaxRAM)) {
|
|
phys_mem = os::physical_memory();
|
|
FLAG_SET_ERGO(MaxRAM, (uint64_t)phys_mem);
|
|
} else {
|
|
phys_mem = (julong)MaxRAM;
|
|
}
|
|
} else {
|
|
phys_mem = FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
|
|
: (julong)MaxRAM;
|
|
}
|
|
|
|
// If the maximum heap size has not been set with -Xmx,
|
|
// then set it as fraction of the size of physical memory,
|
|
// respecting the maximum and minimum sizes of the heap.
|
|
if (FLAG_IS_DEFAULT(MaxHeapSize)) {
|
|
julong reasonable_max = (julong)(((double)phys_mem * MaxRAMPercentage) / 100);
|
|
const julong reasonable_min = (julong)(((double)phys_mem * MinRAMPercentage) / 100);
|
|
if (reasonable_min < MaxHeapSize) {
|
|
// Small physical memory, so use a minimum fraction of it for the heap
|
|
reasonable_max = reasonable_min;
|
|
} else {
|
|
// Not-small physical memory, so require a heap at least
|
|
// as large as MaxHeapSize
|
|
reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
|
|
}
|
|
|
|
if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
|
|
// Limit the heap size to ErgoHeapSizeLimit
|
|
reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
|
|
}
|
|
|
|
reasonable_max = limit_heap_by_allocatable_memory(reasonable_max);
|
|
|
|
if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
|
|
// An initial heap size was specified on the command line,
|
|
// so be sure that the maximum size is consistent. Done
|
|
// after call to limit_heap_by_allocatable_memory because that
|
|
// method might reduce the allocation size.
|
|
reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
|
|
} else if (!FLAG_IS_DEFAULT(MinHeapSize)) {
|
|
reasonable_max = MAX2(reasonable_max, (julong)MinHeapSize);
|
|
}
|
|
|
|
#ifdef _LP64
|
|
if (UseCompressedOops || UseCompressedClassPointers) {
|
|
// HeapBaseMinAddress can be greater than default but not less than.
|
|
if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
|
|
if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
|
|
// matches compressed oops printing flags
|
|
log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least %zu"
|
|
" (%zuG) which is greater than value given %zu",
|
|
DefaultHeapBaseMinAddress,
|
|
DefaultHeapBaseMinAddress/G,
|
|
HeapBaseMinAddress);
|
|
FLAG_SET_ERGO(HeapBaseMinAddress, DefaultHeapBaseMinAddress);
|
|
}
|
|
}
|
|
}
|
|
if (UseCompressedOops) {
|
|
// Limit the heap size to the maximum possible when using compressed oops
|
|
julong max_coop_heap = (julong)max_heap_for_compressed_oops();
|
|
|
|
if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
|
|
// Heap should be above HeapBaseMinAddress to get zero based compressed oops
|
|
// but it should be not less than default MaxHeapSize.
|
|
max_coop_heap -= HeapBaseMinAddress;
|
|
}
|
|
|
|
// If user specified flags prioritizing os physical
|
|
// memory limits, then disable compressed oops if
|
|
// limits exceed max_coop_heap and UseCompressedOops
|
|
// was not specified.
|
|
if (reasonable_max > max_coop_heap) {
|
|
if (FLAG_IS_ERGO(UseCompressedOops) && override_coop_limit) {
|
|
aot_log_info(aot)("UseCompressedOops and UseCompressedClassPointers have been disabled due to"
|
|
" max heap %zu > compressed oop heap %zu. "
|
|
"Please check the setting of MaxRAMPercentage %5.2f."
|
|
,(size_t)reasonable_max, (size_t)max_coop_heap, MaxRAMPercentage);
|
|
FLAG_SET_ERGO(UseCompressedOops, false);
|
|
} else {
|
|
reasonable_max = MIN2(reasonable_max, max_coop_heap);
|
|
}
|
|
}
|
|
}
|
|
#endif // _LP64
|
|
|
|
log_trace(gc, heap)(" Maximum heap size %zu", (size_t) reasonable_max);
|
|
FLAG_SET_ERGO(MaxHeapSize, (size_t)reasonable_max);
|
|
}
|
|
|
|
// If the minimum or initial heap_size have not been set or requested to be set
|
|
// ergonomically, set them accordingly.
|
|
if (InitialHeapSize == 0 || MinHeapSize == 0) {
|
|
julong reasonable_minimum = (julong)(OldSize + NewSize);
|
|
|
|
reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
|
|
|
|
reasonable_minimum = limit_heap_by_allocatable_memory(reasonable_minimum);
|
|
|
|
if (InitialHeapSize == 0) {
|
|
julong reasonable_initial = (julong)(((double)phys_mem * InitialRAMPercentage) / 100);
|
|
reasonable_initial = limit_heap_by_allocatable_memory(reasonable_initial);
|
|
|
|
reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)MinHeapSize);
|
|
reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
|
|
|
|
FLAG_SET_ERGO(InitialHeapSize, (size_t)reasonable_initial);
|
|
log_trace(gc, heap)(" Initial heap size %zu", InitialHeapSize);
|
|
}
|
|
// If the minimum heap size has not been set (via -Xms or -XX:MinHeapSize),
|
|
// synchronize with InitialHeapSize to avoid errors with the default value.
|
|
if (MinHeapSize == 0) {
|
|
FLAG_SET_ERGO(MinHeapSize, MIN2((size_t)reasonable_minimum, InitialHeapSize));
|
|
log_trace(gc, heap)(" Minimum heap size %zu", MinHeapSize);
|
|
}
|
|
}
|
|
}
|
|
|
|
// This option inspects the machine and attempts to set various
|
|
// parameters to be optimal for long-running, memory allocation
|
|
// intensive jobs. It is intended for machines with large
|
|
// amounts of cpu and memory.
|
|
jint Arguments::set_aggressive_heap_flags() {
|
|
// initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
|
|
// VM, but we may not be able to represent the total physical memory
|
|
// available (like having 8gb of memory on a box but using a 32bit VM).
|
|
// Thus, we need to make sure we're using a julong for intermediate
|
|
// calculations.
|
|
julong initHeapSize;
|
|
julong total_memory = os::physical_memory();
|
|
|
|
if (total_memory < (julong) 256 * M) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
|
|
vm_exit(1);
|
|
}
|
|
|
|
// The heap size is half of available memory, or (at most)
|
|
// all of possible memory less 160mb (leaving room for the OS
|
|
// when using ISM). This is the maximum; because adaptive sizing
|
|
// is turned on below, the actual space used may be smaller.
|
|
|
|
initHeapSize = MIN2(total_memory / (julong) 2,
|
|
total_memory - (julong) 160 * M);
|
|
|
|
initHeapSize = limit_heap_by_allocatable_memory(initHeapSize);
|
|
|
|
if (FLAG_IS_DEFAULT(MaxHeapSize)) {
|
|
if (FLAG_SET_CMDLINE(MaxHeapSize, initHeapSize) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(InitialHeapSize, initHeapSize) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(MinHeapSize, initHeapSize) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
}
|
|
if (FLAG_IS_DEFAULT(NewSize)) {
|
|
// Make the young generation 3/8ths of the total heap.
|
|
if (FLAG_SET_CMDLINE(NewSize,
|
|
((julong) MaxHeapSize / (julong) 8) * (julong) 3) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(MaxNewSize, NewSize) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
}
|
|
|
|
#if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
|
|
FLAG_SET_DEFAULT(UseLargePages, true);
|
|
#endif
|
|
|
|
// Increase some data structure sizes for efficiency
|
|
if (FLAG_SET_CMDLINE(ResizeTLAB, false) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(TLABSize, 256 * K) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
// See the OldPLABSize comment below, but replace 'after promotion'
|
|
// with 'after copying'. YoungPLABSize is the size of the survivor
|
|
// space per-gc-thread buffers. The default is 4kw.
|
|
if (FLAG_SET_CMDLINE(YoungPLABSize, 256 * K) != JVMFlag::SUCCESS) { // Note: this is in words
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
// OldPLABSize is the size of the buffers in the old gen that
|
|
// UseParallelGC uses to promote live data that doesn't fit in the
|
|
// survivor spaces. At any given time, there's one for each gc thread.
|
|
// The default size is 1kw. These buffers are rarely used, since the
|
|
// survivor spaces are usually big enough. For specjbb, however, there
|
|
// are occasions when there's lots of live data in the young gen
|
|
// and we end up promoting some of it. We don't have a definite
|
|
// explanation for why bumping OldPLABSize helps, but the theory
|
|
// is that a bigger PLAB results in retaining something like the
|
|
// original allocation order after promotion, which improves mutator
|
|
// locality. A minor effect may be that larger PLABs reduce the
|
|
// number of PLAB allocation events during gc. The value of 8kw
|
|
// was arrived at by experimenting with specjbb.
|
|
if (FLAG_SET_CMDLINE(OldPLABSize, 8 * K) != JVMFlag::SUCCESS) { // Note: this is in words
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
// Enable parallel GC and adaptive generation sizing
|
|
if (FLAG_SET_CMDLINE(UseParallelGC, true) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
// Encourage steady state memory management
|
|
if (FLAG_SET_CMDLINE(ThresholdTolerance, 100) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
// This must be called after ergonomics.
|
|
void Arguments::set_bytecode_flags() {
|
|
if (!RewriteBytecodes) {
|
|
FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
|
|
}
|
|
}
|
|
|
|
// Aggressive optimization flags
|
|
jint Arguments::set_aggressive_opts_flags() {
|
|
#ifdef COMPILER2
|
|
if (AggressiveUnboxing) {
|
|
if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
|
|
FLAG_SET_DEFAULT(EliminateAutoBox, true);
|
|
} else if (!EliminateAutoBox) {
|
|
// warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
|
|
AggressiveUnboxing = false;
|
|
}
|
|
if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
|
|
FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
|
|
} else if (!DoEscapeAnalysis) {
|
|
// warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
|
|
AggressiveUnboxing = false;
|
|
}
|
|
}
|
|
if (!FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
|
|
if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
|
|
FLAG_SET_DEFAULT(EliminateAutoBox, true);
|
|
}
|
|
// Feed the cache size setting into the JDK
|
|
char buffer[1024];
|
|
jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=%zd", AutoBoxCacheMax);
|
|
if (!add_property(buffer)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
//===========================================================================================================
|
|
|
|
void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
|
|
if (_sun_java_launcher != _default_java_launcher) {
|
|
os::free(const_cast<char*>(_sun_java_launcher));
|
|
}
|
|
_sun_java_launcher = os::strdup_check_oom(launcher);
|
|
}
|
|
|
|
bool Arguments::created_by_java_launcher() {
|
|
assert(_sun_java_launcher != nullptr, "property must have value");
|
|
return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
|
|
}
|
|
|
|
bool Arguments::executing_unit_tests() {
|
|
return _executing_unit_tests;
|
|
}
|
|
|
|
//===========================================================================================================
|
|
// Parsing of main arguments
|
|
|
|
static unsigned int addreads_count = 0;
|
|
static unsigned int addexports_count = 0;
|
|
static unsigned int addopens_count = 0;
|
|
static unsigned int patch_mod_count = 0;
|
|
static unsigned int enable_native_access_count = 0;
|
|
static bool patch_mod_javabase = false;
|
|
|
|
// Check the consistency of vm_init_args
|
|
bool Arguments::check_vm_args_consistency() {
|
|
// This may modify compiler flags. Must be called before CompilerConfig::check_args_consistency()
|
|
if (!CDSConfig::check_vm_args_consistency(patch_mod_javabase, mode_flag_cmd_line)) {
|
|
return false;
|
|
}
|
|
|
|
// Method for adding checks for flag consistency.
|
|
// The intent is to warn the user of all possible conflicts,
|
|
// before returning an error.
|
|
// Note: Needs platform-dependent factoring.
|
|
bool status = true;
|
|
|
|
if (TLABRefillWasteFraction == 0) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"TLABRefillWasteFraction should be a denominator, "
|
|
"not %zu\n",
|
|
TLABRefillWasteFraction);
|
|
status = false;
|
|
}
|
|
|
|
status = CompilerConfig::check_args_consistency(status);
|
|
#if INCLUDE_JVMCI
|
|
if (status && EnableJVMCI) {
|
|
// Add the JVMCI module if not using libjvmci or EnableJVMCI
|
|
// was explicitly set on the command line or in the jimage.
|
|
if ((!UseJVMCINativeLibrary || FLAG_IS_CMDLINE(EnableJVMCI) || FLAG_IS_JIMAGE_RESOURCE(EnableJVMCI)) && ClassLoader::is_module_observable("jdk.internal.vm.ci") && !_jvmci_module_added) {
|
|
if (!create_numbered_module_property("jdk.module.addmods", "jdk.internal.vm.ci", _addmods_count++)) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if INCLUDE_JFR
|
|
if (status && (FlightRecorderOptions || StartFlightRecording)) {
|
|
if (!create_numbered_module_property("jdk.module.addmods", "jdk.jfr", _addmods_count++)) {
|
|
return false;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifndef SUPPORT_RESERVED_STACK_AREA
|
|
if (StackReservedPages != 0) {
|
|
FLAG_SET_CMDLINE(StackReservedPages, 0);
|
|
warning("Reserved Stack Area not supported on this platform");
|
|
}
|
|
#endif
|
|
|
|
#ifndef _LP64
|
|
if (LockingMode == LM_LEGACY) {
|
|
FLAG_SET_CMDLINE(LockingMode, LM_LIGHTWEIGHT);
|
|
// Self-forwarding in bit 3 of the mark-word conflicts
|
|
// with 4-byte-aligned stack-locks.
|
|
warning("Legacy locking not supported on this platform");
|
|
}
|
|
#endif
|
|
|
|
if (UseObjectMonitorTable && LockingMode != LM_LIGHTWEIGHT) {
|
|
// ObjectMonitorTable requires lightweight locking.
|
|
FLAG_SET_CMDLINE(UseObjectMonitorTable, false);
|
|
warning("UseObjectMonitorTable requires LM_LIGHTWEIGHT");
|
|
}
|
|
|
|
#if !defined(X86) && !defined(AARCH64) && !defined(PPC64) && !defined(RISCV64) && !defined(S390)
|
|
if (LockingMode == LM_MONITOR) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"LockingMode == 0 (LM_MONITOR) is not fully implemented on this architecture\n");
|
|
return false;
|
|
}
|
|
#endif
|
|
if (VerifyHeavyMonitors && LockingMode != LM_MONITOR) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"-XX:+VerifyHeavyMonitors requires LockingMode == 0 (LM_MONITOR)\n");
|
|
return false;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
|
|
const char* option_type) {
|
|
if (ignore) return false;
|
|
|
|
const char* spacer = " ";
|
|
if (option_type == nullptr) {
|
|
option_type = ++spacer; // Set both to the empty string.
|
|
}
|
|
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Unrecognized %s%soption: %s\n", option_type, spacer,
|
|
option->optionString);
|
|
return true;
|
|
}
|
|
|
|
static const char* user_assertion_options[] = {
|
|
"-da", "-ea", "-disableassertions", "-enableassertions", nullptr
|
|
};
|
|
|
|
static const char* system_assertion_options[] = {
|
|
"-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", nullptr
|
|
};
|
|
|
|
bool Arguments::parse_uint(const char* value,
|
|
uint* uint_arg,
|
|
uint min_size) {
|
|
uint n;
|
|
if (!parse_integer(value, &n)) {
|
|
return false;
|
|
}
|
|
if (n >= min_size) {
|
|
*uint_arg = n;
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool Arguments::create_module_property(const char* prop_name, const char* prop_value, PropertyInternal internal) {
|
|
assert(is_internal_module_property(prop_name), "unknown module property: '%s'", prop_name);
|
|
CDSConfig::check_internal_module_property(prop_name, prop_value);
|
|
size_t prop_len = strlen(prop_name) + strlen(prop_value) + 2;
|
|
char* property = AllocateHeap(prop_len, mtArguments);
|
|
int ret = jio_snprintf(property, prop_len, "%s=%s", prop_name, prop_value);
|
|
if (ret < 0 || ret >= (int)prop_len) {
|
|
FreeHeap(property);
|
|
return false;
|
|
}
|
|
// These are not strictly writeable properties as they cannot be set via -Dprop=val. But that
|
|
// is enforced by checking is_internal_module_property(). We need the property to be writeable so
|
|
// that multiple occurrences of the associated flag just causes the existing property value to be
|
|
// replaced ("last option wins"). Otherwise we would need to keep track of the flags and only convert
|
|
// to a property after we have finished flag processing.
|
|
bool added = add_property(property, WriteableProperty, internal);
|
|
FreeHeap(property);
|
|
return added;
|
|
}
|
|
|
|
bool Arguments::create_numbered_module_property(const char* prop_base_name, const char* prop_value, unsigned int count) {
|
|
assert(is_internal_module_property(prop_base_name), "unknown module property: '%s'", prop_base_name);
|
|
CDSConfig::check_internal_module_property(prop_base_name, prop_value);
|
|
const unsigned int props_count_limit = 1000;
|
|
const int max_digits = 3;
|
|
const int extra_symbols_count = 3; // includes '.', '=', '\0'
|
|
|
|
// Make sure count is < props_count_limit. Otherwise, memory allocation will be too small.
|
|
if (count < props_count_limit) {
|
|
size_t prop_len = strlen(prop_base_name) + strlen(prop_value) + max_digits + extra_symbols_count;
|
|
char* property = AllocateHeap(prop_len, mtArguments);
|
|
int ret = jio_snprintf(property, prop_len, "%s.%d=%s", prop_base_name, count, prop_value);
|
|
if (ret < 0 || ret >= (int)prop_len) {
|
|
FreeHeap(property);
|
|
jio_fprintf(defaultStream::error_stream(), "Failed to create property %s.%d=%s\n", prop_base_name, count, prop_value);
|
|
return false;
|
|
}
|
|
bool added = add_property(property, UnwriteableProperty, InternalProperty);
|
|
FreeHeap(property);
|
|
return added;
|
|
}
|
|
|
|
jio_fprintf(defaultStream::error_stream(), "Property count limit exceeded: %s, limit=%d\n", prop_base_name, props_count_limit);
|
|
return false;
|
|
}
|
|
|
|
Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
|
|
julong* long_arg,
|
|
julong min_size,
|
|
julong max_size) {
|
|
if (!parse_integer(s, long_arg)) return arg_unreadable;
|
|
return check_memory_size(*long_arg, min_size, max_size);
|
|
}
|
|
|
|
jint Arguments::parse_vm_init_args(GrowableArrayCHeap<VMInitArgsGroup, mtArguments>* all_args) {
|
|
// Save default settings for some mode flags
|
|
Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
|
|
Arguments::_UseOnStackReplacement = UseOnStackReplacement;
|
|
Arguments::_ClipInlining = ClipInlining;
|
|
Arguments::_BackgroundCompilation = BackgroundCompilation;
|
|
|
|
// Remember the default value of SharedBaseAddress.
|
|
Arguments::_default_SharedBaseAddress = SharedBaseAddress;
|
|
|
|
// Setup flags for mixed which is the default
|
|
set_mode_flags(_mixed);
|
|
|
|
jint result;
|
|
for (int i = 0; i < all_args->length(); i++) {
|
|
result = parse_each_vm_init_arg(all_args->at(i)._args, all_args->at(i)._origin);
|
|
if (result != JNI_OK) {
|
|
return result;
|
|
}
|
|
}
|
|
|
|
// Disable CDS for exploded image
|
|
if (!has_jimage()) {
|
|
no_shared_spaces("CDS disabled on exploded JDK");
|
|
}
|
|
|
|
// We need to ensure processor and memory resources have been properly
|
|
// configured - which may rely on arguments we just processed - before
|
|
// doing the final argument processing. Any argument processing that
|
|
// needs to know about processor and memory resources must occur after
|
|
// this point.
|
|
|
|
os::init_container_support();
|
|
|
|
SystemMemoryBarrier::initialize();
|
|
|
|
// Do final processing now that all arguments have been parsed
|
|
result = finalize_vm_init_args();
|
|
if (result != JNI_OK) {
|
|
return result;
|
|
}
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
#if !INCLUDE_JVMTI || INCLUDE_CDS
|
|
// Checks if name in command-line argument -agent{lib,path}:name[=options]
|
|
// represents a valid JDWP agent. is_path==true denotes that we
|
|
// are dealing with -agentpath (case where name is a path), otherwise with
|
|
// -agentlib
|
|
static bool valid_jdwp_agent(char *name, bool is_path) {
|
|
char *_name;
|
|
const char *_jdwp = "jdwp";
|
|
size_t _len_jdwp, _len_prefix;
|
|
|
|
if (is_path) {
|
|
if ((_name = strrchr(name, (int) *os::file_separator())) == nullptr) {
|
|
return false;
|
|
}
|
|
|
|
_name++; // skip past last path separator
|
|
_len_prefix = strlen(JNI_LIB_PREFIX);
|
|
|
|
if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
|
|
return false;
|
|
}
|
|
|
|
_name += _len_prefix;
|
|
_len_jdwp = strlen(_jdwp);
|
|
|
|
if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
|
|
_name += _len_jdwp;
|
|
}
|
|
else {
|
|
return false;
|
|
}
|
|
|
|
if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
if (strcmp(name, _jdwp) == 0) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
int Arguments::process_patch_mod_option(const char* patch_mod_tail) {
|
|
// --patch-module=<module>=<file>(<pathsep><file>)*
|
|
assert(patch_mod_tail != nullptr, "Unexpected null patch-module value");
|
|
// Find the equal sign between the module name and the path specification
|
|
const char* module_equal = strchr(patch_mod_tail, '=');
|
|
if (module_equal == nullptr) {
|
|
jio_fprintf(defaultStream::output_stream(), "Missing '=' in --patch-module specification\n");
|
|
return JNI_ERR;
|
|
} else {
|
|
// Pick out the module name
|
|
size_t module_len = module_equal - patch_mod_tail;
|
|
char* module_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, module_len+1, mtArguments);
|
|
if (module_name != nullptr) {
|
|
memcpy(module_name, patch_mod_tail, module_len);
|
|
*(module_name + module_len) = '\0';
|
|
// The path piece begins one past the module_equal sign
|
|
add_patch_mod_prefix(module_name, module_equal + 1);
|
|
FREE_C_HEAP_ARRAY(char, module_name);
|
|
if (!create_numbered_module_property("jdk.module.patch", patch_mod_tail, patch_mod_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else {
|
|
return JNI_ENOMEM;
|
|
}
|
|
}
|
|
return JNI_OK;
|
|
}
|
|
|
|
// Parse -Xss memory string parameter and convert to ThreadStackSize in K.
|
|
jint Arguments::parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize) {
|
|
// The min and max sizes match the values in globals.hpp, but scaled
|
|
// with K. The values have been chosen so that alignment with page
|
|
// size doesn't change the max value, which makes the conversions
|
|
// back and forth between Xss value and ThreadStackSize value easier.
|
|
// The values have also been chosen to fit inside a 32-bit signed type.
|
|
const julong min_ThreadStackSize = 0;
|
|
const julong max_ThreadStackSize = 1 * M;
|
|
|
|
// Make sure the above values match the range set in globals.hpp
|
|
const JVMTypedFlagLimit<intx>* limit = JVMFlagLimit::get_range_at(FLAG_MEMBER_ENUM(ThreadStackSize))->cast<intx>();
|
|
assert(min_ThreadStackSize == static_cast<julong>(limit->min()), "must be");
|
|
assert(max_ThreadStackSize == static_cast<julong>(limit->max()), "must be");
|
|
|
|
const julong min_size = min_ThreadStackSize * K;
|
|
const julong max_size = max_ThreadStackSize * K;
|
|
|
|
assert(is_aligned(max_size, os::vm_page_size()), "Implementation assumption");
|
|
|
|
julong size = 0;
|
|
ArgsRange errcode = parse_memory_size(tail, &size, min_size, max_size);
|
|
if (errcode != arg_in_range) {
|
|
bool silent = (option == nullptr); // Allow testing to silence error messages
|
|
if (!silent) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid thread stack size: %s\n", option->optionString);
|
|
describe_range_error(errcode);
|
|
}
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
// Internally track ThreadStackSize in units of 1024 bytes.
|
|
const julong size_aligned = align_up(size, K);
|
|
assert(size <= size_aligned,
|
|
"Overflow: " JULONG_FORMAT " " JULONG_FORMAT,
|
|
size, size_aligned);
|
|
|
|
const julong size_in_K = size_aligned / K;
|
|
assert(size_in_K < (julong)max_intx,
|
|
"size_in_K doesn't fit in the type of ThreadStackSize: " JULONG_FORMAT,
|
|
size_in_K);
|
|
|
|
// Check that code expanding ThreadStackSize to a page aligned number of bytes won't overflow.
|
|
const julong max_expanded = align_up(size_in_K * K, os::vm_page_size());
|
|
assert(max_expanded < max_uintx && max_expanded >= size_in_K,
|
|
"Expansion overflowed: " JULONG_FORMAT " " JULONG_FORMAT,
|
|
max_expanded, size_in_K);
|
|
|
|
*out_ThreadStackSize = (intx)size_in_K;
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, JVMFlagOrigin origin) {
|
|
// For match_option to return remaining or value part of option string
|
|
const char* tail;
|
|
|
|
// iterate over arguments
|
|
for (int index = 0; index < args->nOptions; index++) {
|
|
bool is_absolute_path = false; // for -agentpath vs -agentlib
|
|
|
|
const JavaVMOption* option = args->options + index;
|
|
|
|
if (!match_option(option, "-Djava.class.path", &tail) &&
|
|
!match_option(option, "-Dsun.java.command", &tail) &&
|
|
!match_option(option, "-Dsun.java.launcher", &tail)) {
|
|
|
|
// add all jvm options to the jvm_args string. This string
|
|
// is used later to set the java.vm.args PerfData string constant.
|
|
// the -Djava.class.path and the -Dsun.java.command options are
|
|
// omitted from jvm_args string as each have their own PerfData
|
|
// string constant object.
|
|
build_jvm_args(option->optionString);
|
|
}
|
|
|
|
// -verbose:[class/module/gc/jni]
|
|
if (match_option(option, "-verbose", &tail)) {
|
|
if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
|
|
LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load));
|
|
LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload));
|
|
} else if (!strcmp(tail, ":module")) {
|
|
LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, load));
|
|
LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, unload));
|
|
} else if (!strcmp(tail, ":gc")) {
|
|
if (_legacyGCLogging.lastFlag == 0) {
|
|
_legacyGCLogging.lastFlag = 1;
|
|
}
|
|
} else if (!strcmp(tail, ":jni")) {
|
|
LogConfiguration::configure_stdout(LogLevel::Debug, true, LOG_TAGS(jni, resolve));
|
|
}
|
|
// -da / -ea / -disableassertions / -enableassertions
|
|
// These accept an optional class/package name separated by a colon, e.g.,
|
|
// -da:java.lang.Thread.
|
|
} else if (match_option(option, user_assertion_options, &tail, true)) {
|
|
bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
|
|
if (*tail == '\0') {
|
|
JavaAssertions::setUserClassDefault(enable);
|
|
} else {
|
|
assert(*tail == ':', "bogus match by match_option()");
|
|
JavaAssertions::addOption(tail + 1, enable);
|
|
}
|
|
// -dsa / -esa / -disablesystemassertions / -enablesystemassertions
|
|
} else if (match_option(option, system_assertion_options, &tail, false)) {
|
|
bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
|
|
JavaAssertions::setSystemClassDefault(enable);
|
|
// -bootclasspath:
|
|
} else if (match_option(option, "-Xbootclasspath:", &tail)) {
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"-Xbootclasspath is no longer a supported option.\n");
|
|
return JNI_EINVAL;
|
|
// -bootclasspath/a:
|
|
} else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
|
|
Arguments::append_sysclasspath(tail);
|
|
// -bootclasspath/p:
|
|
} else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"-Xbootclasspath/p is no longer a supported option.\n");
|
|
return JNI_EINVAL;
|
|
// -Xrun
|
|
} else if (match_option(option, "-Xrun", &tail)) {
|
|
if (tail != nullptr) {
|
|
const char* pos = strchr(tail, ':');
|
|
size_t len = (pos == nullptr) ? strlen(tail) : pos - tail;
|
|
char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments);
|
|
jio_snprintf(name, len + 1, "%s", tail);
|
|
|
|
char *options = nullptr;
|
|
if(pos != nullptr) {
|
|
size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
|
|
options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2);
|
|
}
|
|
#if !INCLUDE_JVMTI
|
|
if (strcmp(name, "jdwp") == 0) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Debugging agents are not supported in this VM\n");
|
|
return JNI_ERR;
|
|
}
|
|
#endif // !INCLUDE_JVMTI
|
|
JvmtiAgentList::add_xrun(name, options, false);
|
|
FREE_C_HEAP_ARRAY(char, name);
|
|
FREE_C_HEAP_ARRAY(char, options);
|
|
}
|
|
} else if (match_option(option, "--add-reads=", &tail)) {
|
|
if (!create_numbered_module_property("jdk.module.addreads", tail, addreads_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else if (match_option(option, "--add-exports=", &tail)) {
|
|
if (!create_numbered_module_property("jdk.module.addexports", tail, addexports_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else if (match_option(option, "--add-opens=", &tail)) {
|
|
if (!create_numbered_module_property("jdk.module.addopens", tail, addopens_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else if (match_option(option, "--add-modules=", &tail)) {
|
|
if (!create_numbered_module_property("jdk.module.addmods", tail, _addmods_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
#if INCLUDE_JVMCI
|
|
if (!_jvmci_module_added) {
|
|
const char *jvmci_module = strstr(tail, "jdk.internal.vm.ci");
|
|
if (jvmci_module != nullptr) {
|
|
char before = *(jvmci_module - 1);
|
|
char after = *(jvmci_module + strlen("jdk.internal.vm.ci"));
|
|
if ((before == '=' || before == ',') && (after == '\0' || after == ',')) {
|
|
FLAG_SET_DEFAULT(EnableJVMCI, true);
|
|
_jvmci_module_added = true;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
} else if (match_option(option, "--enable-native-access=", &tail)) {
|
|
if (!create_numbered_module_property("jdk.module.enable.native.access", tail, enable_native_access_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else if (match_option(option, "--illegal-native-access=", &tail)) {
|
|
if (!create_module_property("jdk.module.illegal.native.access", tail, InternalProperty)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else if (match_option(option, "--limit-modules=", &tail)) {
|
|
if (!create_module_property("jdk.module.limitmods", tail, InternalProperty)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else if (match_option(option, "--module-path=", &tail)) {
|
|
if (!create_module_property("jdk.module.path", tail, ExternalProperty)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else if (match_option(option, "--upgrade-module-path=", &tail)) {
|
|
if (!create_module_property("jdk.module.upgrade.path", tail, ExternalProperty)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
} else if (match_option(option, "--patch-module=", &tail)) {
|
|
// --patch-module=<module>=<file>(<pathsep><file>)*
|
|
int res = process_patch_mod_option(tail);
|
|
if (res != JNI_OK) {
|
|
return res;
|
|
}
|
|
} else if (match_option(option, "--sun-misc-unsafe-memory-access=", &tail)) {
|
|
if (strcmp(tail, "allow") == 0 || strcmp(tail, "warn") == 0 || strcmp(tail, "debug") == 0 || strcmp(tail, "deny") == 0) {
|
|
PropertyList_unique_add(&_system_properties, "sun.misc.unsafe.memory.access", tail,
|
|
AddProperty, WriteableProperty, InternalProperty);
|
|
} else {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Value specified to --sun-misc-unsafe-memory-access not recognized: '%s'\n", tail);
|
|
return JNI_ERR;
|
|
}
|
|
} else if (match_option(option, "--illegal-access=", &tail)) {
|
|
char version[256];
|
|
JDK_Version::jdk(17).to_string(version, sizeof(version));
|
|
warning("Ignoring option %s; support was removed in %s", option->optionString, version);
|
|
// -agentlib and -agentpath
|
|
} else if (match_option(option, "-agentlib:", &tail) ||
|
|
(is_absolute_path = match_option(option, "-agentpath:", &tail))) {
|
|
if(tail != nullptr) {
|
|
const char* pos = strchr(tail, '=');
|
|
char* name;
|
|
if (pos == nullptr) {
|
|
name = os::strdup_check_oom(tail, mtArguments);
|
|
} else {
|
|
size_t len = pos - tail;
|
|
name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments);
|
|
memcpy(name, tail, len);
|
|
name[len] = '\0';
|
|
}
|
|
|
|
char *options = nullptr;
|
|
if(pos != nullptr) {
|
|
options = os::strdup_check_oom(pos + 1, mtArguments);
|
|
}
|
|
#if !INCLUDE_JVMTI
|
|
if (valid_jdwp_agent(name, is_absolute_path)) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Debugging agents are not supported in this VM\n");
|
|
return JNI_ERR;
|
|
}
|
|
#elif INCLUDE_CDS
|
|
if (valid_jdwp_agent(name, is_absolute_path)) {
|
|
_has_jdwp_agent = true;
|
|
}
|
|
#endif // !INCLUDE_JVMTI
|
|
JvmtiAgentList::add(name, options, is_absolute_path);
|
|
os::free(name);
|
|
os::free(options);
|
|
}
|
|
// -javaagent
|
|
} else if (match_option(option, "-javaagent:", &tail)) {
|
|
#if !INCLUDE_JVMTI
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Instrumentation agents are not supported in this VM\n");
|
|
return JNI_ERR;
|
|
#else
|
|
if (tail != nullptr) {
|
|
size_t length = strlen(tail) + 1;
|
|
char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments);
|
|
jio_snprintf(options, length, "%s", tail);
|
|
JvmtiAgentList::add("instrument", options, false);
|
|
FREE_C_HEAP_ARRAY(char, options);
|
|
|
|
// java agents need module java.instrument
|
|
if (!create_numbered_module_property("jdk.module.addmods", "java.instrument", _addmods_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
}
|
|
#endif // !INCLUDE_JVMTI
|
|
// --enable_preview
|
|
} else if (match_option(option, "--enable-preview")) {
|
|
set_enable_preview();
|
|
// -Xnoclassgc
|
|
} else if (match_option(option, "-Xnoclassgc")) {
|
|
if (FLAG_SET_CMDLINE(ClassUnloading, false) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xbatch
|
|
} else if (match_option(option, "-Xbatch")) {
|
|
if (FLAG_SET_CMDLINE(BackgroundCompilation, false) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xmn for compatibility with other JVM vendors
|
|
} else if (match_option(option, "-Xmn", &tail)) {
|
|
julong long_initial_young_size = 0;
|
|
ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
|
|
if (errcode != arg_in_range) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid initial young generation size: %s\n", option->optionString);
|
|
describe_range_error(errcode);
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(MaxNewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(NewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xms
|
|
} else if (match_option(option, "-Xms", &tail)) {
|
|
julong size = 0;
|
|
// an initial heap size of 0 means automatically determine
|
|
ArgsRange errcode = parse_memory_size(tail, &size, 0);
|
|
if (errcode != arg_in_range) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid initial heap size: %s\n", option->optionString);
|
|
describe_range_error(errcode);
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(MinHeapSize, (size_t)size) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(InitialHeapSize, (size_t)size) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xmx
|
|
} else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
|
|
julong long_max_heap_size = 0;
|
|
ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
|
|
if (errcode != arg_in_range) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid maximum heap size: %s\n", option->optionString);
|
|
describe_range_error(errcode);
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(MaxHeapSize, (size_t)long_max_heap_size) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// Xmaxf
|
|
} else if (match_option(option, "-Xmaxf", &tail)) {
|
|
char* err;
|
|
int maxf = (int)(strtod(tail, &err) * 100);
|
|
if (*err != '\0' || *tail == '\0') {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Bad max heap free percentage size: %s\n",
|
|
option->optionString);
|
|
return JNI_EINVAL;
|
|
} else {
|
|
if (FLAG_SET_CMDLINE(MaxHeapFreeRatio, maxf) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
}
|
|
// Xminf
|
|
} else if (match_option(option, "-Xminf", &tail)) {
|
|
char* err;
|
|
int minf = (int)(strtod(tail, &err) * 100);
|
|
if (*err != '\0' || *tail == '\0') {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Bad min heap free percentage size: %s\n",
|
|
option->optionString);
|
|
return JNI_EINVAL;
|
|
} else {
|
|
if (FLAG_SET_CMDLINE(MinHeapFreeRatio, minf) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
}
|
|
// -Xss
|
|
} else if (match_option(option, "-Xss", &tail)) {
|
|
intx value = 0;
|
|
jint err = parse_xss(option, tail, &value);
|
|
if (err != JNI_OK) {
|
|
return err;
|
|
}
|
|
if (FLAG_SET_CMDLINE(ThreadStackSize, value) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
|
|
match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
|
|
julong long_ReservedCodeCacheSize = 0;
|
|
|
|
ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
|
|
if (errcode != arg_in_range) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid maximum code cache size: %s.\n", option->optionString);
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -green
|
|
} else if (match_option(option, "-green")) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Green threads support not available\n");
|
|
return JNI_EINVAL;
|
|
// -native
|
|
} else if (match_option(option, "-native")) {
|
|
// HotSpot always uses native threads, ignore silently for compatibility
|
|
// -Xrs
|
|
} else if (match_option(option, "-Xrs")) {
|
|
// Classic/EVM option, new functionality
|
|
if (FLAG_SET_CMDLINE(ReduceSignalUsage, true) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xprof
|
|
} else if (match_option(option, "-Xprof")) {
|
|
char version[256];
|
|
// Obsolete in JDK 10
|
|
JDK_Version::jdk(10).to_string(version, sizeof(version));
|
|
warning("Ignoring option %s; support was removed in %s", option->optionString, version);
|
|
// -Xinternalversion
|
|
} else if (match_option(option, "-Xinternalversion")) {
|
|
jio_fprintf(defaultStream::output_stream(), "%s\n",
|
|
VM_Version::internal_vm_info_string());
|
|
vm_exit(0);
|
|
#ifndef PRODUCT
|
|
// -Xprintflags
|
|
} else if (match_option(option, "-Xprintflags")) {
|
|
JVMFlag::printFlags(tty, false);
|
|
vm_exit(0);
|
|
#endif
|
|
// -D
|
|
} else if (match_option(option, "-D", &tail)) {
|
|
const char* value;
|
|
if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
|
|
*value!= '\0' && strcmp(value, "\"\"") != 0) {
|
|
// abort if -Djava.endorsed.dirs is set
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
|
|
"in modular form will be supported via the concept of upgradeable modules.\n", value);
|
|
return JNI_EINVAL;
|
|
}
|
|
if (match_option(option, "-Djava.ext.dirs=", &value) &&
|
|
*value != '\0' && strcmp(value, "\"\"") != 0) {
|
|
// abort if -Djava.ext.dirs is set
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
|
|
return JNI_EINVAL;
|
|
}
|
|
// Check for module related properties. They must be set using the modules
|
|
// options. For example: use "--add-modules=java.sql", not
|
|
// "-Djdk.module.addmods=java.sql"
|
|
if (is_internal_module_property(option->optionString + 2)) {
|
|
needs_module_property_warning = true;
|
|
continue;
|
|
}
|
|
if (!add_property(tail)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
// Out of the box management support
|
|
if (match_option(option, "-Dcom.sun.management", &tail)) {
|
|
#if INCLUDE_MANAGEMENT
|
|
if (FLAG_SET_CMDLINE(ManagementServer, true) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// management agent in module jdk.management.agent
|
|
if (!create_numbered_module_property("jdk.module.addmods", "jdk.management.agent", _addmods_count++)) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
#else
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"-Dcom.sun.management is not supported in this VM.\n");
|
|
return JNI_ERR;
|
|
#endif
|
|
}
|
|
// -Xint
|
|
} else if (match_option(option, "-Xint")) {
|
|
set_mode_flags(_int);
|
|
mode_flag_cmd_line = true;
|
|
// -Xmixed
|
|
} else if (match_option(option, "-Xmixed")) {
|
|
set_mode_flags(_mixed);
|
|
mode_flag_cmd_line = true;
|
|
// -Xcomp
|
|
} else if (match_option(option, "-Xcomp")) {
|
|
// for testing the compiler; turn off all flags that inhibit compilation
|
|
set_mode_flags(_comp);
|
|
mode_flag_cmd_line = true;
|
|
// -Xshare:dump
|
|
} else if (match_option(option, "-Xshare:dump")) {
|
|
CDSConfig::enable_dumping_static_archive();
|
|
CDSConfig::set_old_cds_flags_used();
|
|
// -Xshare:on
|
|
} else if (match_option(option, "-Xshare:on")) {
|
|
UseSharedSpaces = true;
|
|
RequireSharedSpaces = true;
|
|
CDSConfig::set_old_cds_flags_used();
|
|
// -Xshare:auto || -XX:ArchiveClassesAtExit=<archive file>
|
|
} else if (match_option(option, "-Xshare:auto")) {
|
|
UseSharedSpaces = true;
|
|
RequireSharedSpaces = false;
|
|
xshare_auto_cmd_line = true;
|
|
CDSConfig::set_old_cds_flags_used();
|
|
// -Xshare:off
|
|
} else if (match_option(option, "-Xshare:off")) {
|
|
UseSharedSpaces = false;
|
|
RequireSharedSpaces = false;
|
|
CDSConfig::set_old_cds_flags_used();
|
|
// -Xverify
|
|
} else if (match_option(option, "-Xverify", &tail)) {
|
|
if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
|
|
if (FLAG_SET_CMDLINE(BytecodeVerificationLocal, true) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (strcmp(tail, ":remote") == 0) {
|
|
if (FLAG_SET_CMDLINE(BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (strcmp(tail, ":none") == 0) {
|
|
if (FLAG_SET_CMDLINE(BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(BytecodeVerificationRemote, false) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
warning("Options -Xverify:none and -noverify were deprecated in JDK 13 and will likely be removed in a future release.");
|
|
} else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
|
|
return JNI_EINVAL;
|
|
}
|
|
// -Xdebug
|
|
} else if (match_option(option, "-Xdebug")) {
|
|
warning("Option -Xdebug was deprecated in JDK 22 and will likely be removed in a future release.");
|
|
} else if (match_option(option, "-Xloggc:", &tail)) {
|
|
// Deprecated flag to redirect GC output to a file. -Xloggc:<filename>
|
|
log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail);
|
|
_legacyGCLogging.lastFlag = 2;
|
|
_legacyGCLogging.file = os::strdup_check_oom(tail);
|
|
} else if (match_option(option, "-Xlog", &tail)) {
|
|
bool ret = false;
|
|
if (strcmp(tail, ":help") == 0) {
|
|
fileStream stream(defaultStream::output_stream());
|
|
LogConfiguration::print_command_line_help(&stream);
|
|
vm_exit(0);
|
|
} else if (strcmp(tail, ":disable") == 0) {
|
|
LogConfiguration::disable_logging();
|
|
ret = true;
|
|
} else if (strncmp(tail, ":async", strlen(":async")) == 0) {
|
|
const char* async_tail = tail + strlen(":async");
|
|
ret = LogConfiguration::parse_async_argument(async_tail);
|
|
} else if (*tail == '\0') {
|
|
ret = LogConfiguration::parse_command_line_arguments();
|
|
assert(ret, "-Xlog without arguments should never fail to parse");
|
|
} else if (*tail == ':') {
|
|
ret = LogConfiguration::parse_command_line_arguments(tail + 1);
|
|
}
|
|
if (ret == false) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid -Xlog option '-Xlog%s', see error log for details.\n",
|
|
tail);
|
|
return JNI_EINVAL;
|
|
}
|
|
// JNI hooks
|
|
} else if (match_option(option, "-Xcheck", &tail)) {
|
|
if (!strcmp(tail, ":jni")) {
|
|
#if !INCLUDE_JNI_CHECK
|
|
warning("JNI CHECKING is not supported in this VM");
|
|
#else
|
|
CheckJNICalls = true;
|
|
#endif // INCLUDE_JNI_CHECK
|
|
} else if (is_bad_option(option, args->ignoreUnrecognized,
|
|
"check")) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (match_option(option, "vfprintf")) {
|
|
_vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
|
|
} else if (match_option(option, "exit")) {
|
|
_exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
|
|
} else if (match_option(option, "abort")) {
|
|
_abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
|
|
// Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
|
|
// and the last option wins.
|
|
} else if (match_option(option, "-XX:+NeverTenure")) {
|
|
if (FLAG_SET_CMDLINE(NeverTenure, true) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(AlwaysTenure, false) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(MaxTenuringThreshold, markWord::max_age + 1) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (match_option(option, "-XX:+AlwaysTenure")) {
|
|
if (FLAG_SET_CMDLINE(NeverTenure, false) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(AlwaysTenure, true) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(MaxTenuringThreshold, 0) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
|
|
uint max_tenuring_thresh = 0;
|
|
if (!parse_uint(tail, &max_tenuring_thresh, 0)) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
if (FLAG_SET_CMDLINE(MaxTenuringThreshold, max_tenuring_thresh) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
if (MaxTenuringThreshold == 0) {
|
|
if (FLAG_SET_CMDLINE(NeverTenure, false) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(AlwaysTenure, true) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else {
|
|
if (FLAG_SET_CMDLINE(NeverTenure, false) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(AlwaysTenure, false) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
}
|
|
} else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
|
|
if (FLAG_SET_CMDLINE(DisplayVMOutputToStdout, false) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(DisplayVMOutputToStderr, true) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
|
|
if (FLAG_SET_CMDLINE(DisplayVMOutputToStderr, false) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(DisplayVMOutputToStdout, true) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (match_option(option, "-XX:+ErrorFileToStderr")) {
|
|
if (FLAG_SET_CMDLINE(ErrorFileToStdout, false) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(ErrorFileToStderr, true) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (match_option(option, "-XX:+ErrorFileToStdout")) {
|
|
if (FLAG_SET_CMDLINE(ErrorFileToStderr, false) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
if (FLAG_SET_CMDLINE(ErrorFileToStdout, true) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (match_option(option, "--finalization=", &tail)) {
|
|
if (strcmp(tail, "enabled") == 0) {
|
|
InstanceKlass::set_finalization_enabled(true);
|
|
} else if (strcmp(tail, "disabled") == 0) {
|
|
InstanceKlass::set_finalization_enabled(false);
|
|
} else {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Invalid finalization value '%s', must be 'disabled' or 'enabled'.\n",
|
|
tail);
|
|
return JNI_EINVAL;
|
|
}
|
|
#if !defined(DTRACE_ENABLED)
|
|
} else if (match_option(option, "-XX:+DTraceMethodProbes")) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"DTraceMethodProbes flag is not applicable for this configuration\n");
|
|
return JNI_EINVAL;
|
|
} else if (match_option(option, "-XX:+DTraceAllocProbes")) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"DTraceAllocProbes flag is not applicable for this configuration\n");
|
|
return JNI_EINVAL;
|
|
} else if (match_option(option, "-XX:+DTraceMonitorProbes")) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"DTraceMonitorProbes flag is not applicable for this configuration\n");
|
|
return JNI_EINVAL;
|
|
#endif // !defined(DTRACE_ENABLED)
|
|
#ifdef ASSERT
|
|
} else if (match_option(option, "-XX:+FullGCALot")) {
|
|
if (FLAG_SET_CMDLINE(FullGCALot, true) != JVMFlag::SUCCESS) {
|
|
return JNI_EINVAL;
|
|
}
|
|
#endif
|
|
#if !INCLUDE_MANAGEMENT
|
|
} else if (match_option(option, "-XX:+ManagementServer")) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"ManagementServer is not supported in this VM.\n");
|
|
return JNI_ERR;
|
|
#endif // INCLUDE_MANAGEMENT
|
|
#if INCLUDE_JVMCI
|
|
} else if (match_option(option, "-XX:-EnableJVMCIProduct") || match_option(option, "-XX:-UseGraalJIT")) {
|
|
if (EnableJVMCIProduct) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"-XX:-EnableJVMCIProduct or -XX:-UseGraalJIT cannot come after -XX:+EnableJVMCIProduct or -XX:+UseGraalJIT\n");
|
|
return JNI_EINVAL;
|
|
}
|
|
} else if (match_option(option, "-XX:+EnableJVMCIProduct") || match_option(option, "-XX:+UseGraalJIT")) {
|
|
bool use_graal_jit = match_option(option, "-XX:+UseGraalJIT");
|
|
if (use_graal_jit) {
|
|
const char* jvmci_compiler = get_property("jvmci.Compiler");
|
|
if (jvmci_compiler != nullptr) {
|
|
if (strncmp(jvmci_compiler, "graal", strlen("graal")) != 0) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Value of jvmci.Compiler incompatible with +UseGraalJIT: %s\n", jvmci_compiler);
|
|
return JNI_ERR;
|
|
}
|
|
} else if (!add_property("jvmci.Compiler=graal")) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
}
|
|
|
|
// Just continue, since "-XX:+EnableJVMCIProduct" or "-XX:+UseGraalJIT" has been specified before
|
|
if (EnableJVMCIProduct) {
|
|
continue;
|
|
}
|
|
JVMFlag *jvmciFlag = JVMFlag::find_flag("EnableJVMCIProduct");
|
|
// Allow this flag if it has been unlocked.
|
|
if (jvmciFlag != nullptr && jvmciFlag->is_unlocked()) {
|
|
if (!JVMCIGlobals::enable_jvmci_product_mode(origin, use_graal_jit)) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Unable to enable JVMCI in product mode\n");
|
|
return JNI_ERR;
|
|
}
|
|
}
|
|
// The flag was locked so process normally to report that error
|
|
else if (!process_argument(use_graal_jit ? "UseGraalJIT" : "EnableJVMCIProduct", args->ignoreUnrecognized, origin)) {
|
|
return JNI_EINVAL;
|
|
}
|
|
#endif // INCLUDE_JVMCI
|
|
#if INCLUDE_JFR
|
|
} else if (match_jfr_option(&option)) {
|
|
return JNI_EINVAL;
|
|
#endif
|
|
} else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
|
|
// Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
|
|
// already been handled
|
|
if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
|
|
(strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
|
|
if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
|
|
return JNI_EINVAL;
|
|
}
|
|
}
|
|
// Unknown option
|
|
} else if (is_bad_option(option, args->ignoreUnrecognized)) {
|
|
return JNI_ERR;
|
|
}
|
|
}
|
|
|
|
// PrintSharedArchiveAndExit will turn on
|
|
// -Xshare:on
|
|
// -Xlog:class+path=info
|
|
if (PrintSharedArchiveAndExit) {
|
|
UseSharedSpaces = true;
|
|
RequireSharedSpaces = true;
|
|
LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path));
|
|
}
|
|
|
|
fix_appclasspath();
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
void Arguments::add_patch_mod_prefix(const char* module_name, const char* path) {
|
|
// For java.base check for duplicate --patch-module options being specified on the command line.
|
|
// This check is only required for java.base, all other duplicate module specifications
|
|
// will be checked during module system initialization. The module system initialization
|
|
// will throw an ExceptionInInitializerError if this situation occurs.
|
|
if (strcmp(module_name, JAVA_BASE_NAME) == 0) {
|
|
if (patch_mod_javabase) {
|
|
vm_exit_during_initialization("Cannot specify " JAVA_BASE_NAME " more than once to --patch-module");
|
|
} else {
|
|
patch_mod_javabase = true;
|
|
}
|
|
}
|
|
|
|
// Create GrowableArray lazily, only if --patch-module has been specified
|
|
if (_patch_mod_prefix == nullptr) {
|
|
_patch_mod_prefix = new (mtArguments) GrowableArray<ModulePatchPath*>(10, mtArguments);
|
|
}
|
|
|
|
_patch_mod_prefix->push(new ModulePatchPath(module_name, path));
|
|
}
|
|
|
|
// Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
|
|
//
|
|
// This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
|
|
// in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
|
|
// Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
|
|
// path is treated as the current directory.
|
|
//
|
|
// This causes problems with CDS, which requires that all directories specified in the classpath
|
|
// must be empty. In most cases, applications do NOT want to load classes from the current
|
|
// directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
|
|
// scripts compatible with CDS.
|
|
void Arguments::fix_appclasspath() {
|
|
if (IgnoreEmptyClassPaths) {
|
|
const char separator = *os::path_separator();
|
|
const char* src = _java_class_path->value();
|
|
|
|
// skip over all the leading empty paths
|
|
while (*src == separator) {
|
|
src ++;
|
|
}
|
|
|
|
char* copy = os::strdup_check_oom(src, mtArguments);
|
|
|
|
// trim all trailing empty paths
|
|
for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
|
|
*tail = '\0';
|
|
}
|
|
|
|
char from[3] = {separator, separator, '\0'};
|
|
char to [2] = {separator, '\0'};
|
|
while (StringUtils::replace_no_expand(copy, from, to) > 0) {
|
|
// Keep replacing "::" -> ":" until we have no more "::" (non-windows)
|
|
// Keep replacing ";;" -> ";" until we have no more ";;" (windows)
|
|
}
|
|
|
|
_java_class_path->set_writeable_value(copy);
|
|
FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
|
|
}
|
|
}
|
|
|
|
jint Arguments::finalize_vm_init_args() {
|
|
// check if the default lib/endorsed directory exists; if so, error
|
|
char path[JVM_MAXPATHLEN];
|
|
const char* fileSep = os::file_separator();
|
|
jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
|
|
|
|
DIR* dir = os::opendir(path);
|
|
if (dir != nullptr) {
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
|
|
"in modular form will be supported via the concept of upgradeable modules.\n");
|
|
os::closedir(dir);
|
|
return JNI_ERR;
|
|
}
|
|
|
|
jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
|
|
dir = os::opendir(path);
|
|
if (dir != nullptr) {
|
|
jio_fprintf(defaultStream::output_stream(),
|
|
"<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
|
|
"Use -classpath instead.\n.");
|
|
os::closedir(dir);
|
|
return JNI_ERR;
|
|
}
|
|
|
|
// This must be done after all arguments have been processed
|
|
// and the container support has been initialized since AggressiveHeap
|
|
// relies on the amount of total memory available.
|
|
if (AggressiveHeap) {
|
|
jint result = set_aggressive_heap_flags();
|
|
if (result != JNI_OK) {
|
|
return result;
|
|
}
|
|
}
|
|
|
|
// CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
|
|
// but like -Xint, leave compilation thresholds unaffected.
|
|
// With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
|
|
if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
|
|
set_mode_flags(_int);
|
|
}
|
|
|
|
#ifdef ZERO
|
|
// Zero always runs in interpreted mode
|
|
set_mode_flags(_int);
|
|
#endif
|
|
|
|
// eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
|
|
if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
|
|
FLAG_SET_ERGO(InitialTenuringThreshold, MaxTenuringThreshold);
|
|
}
|
|
|
|
#if !COMPILER2_OR_JVMCI
|
|
// Don't degrade server performance for footprint
|
|
if (FLAG_IS_DEFAULT(UseLargePages) &&
|
|
MaxHeapSize < LargePageHeapSizeThreshold) {
|
|
// No need for large granularity pages w/small heaps.
|
|
// Note that large pages are enabled/disabled for both the
|
|
// Java heap and the code cache.
|
|
FLAG_SET_DEFAULT(UseLargePages, false);
|
|
}
|
|
|
|
UNSUPPORTED_OPTION(ProfileInterpreter);
|
|
#endif
|
|
|
|
// Parse the CompilationMode flag
|
|
if (!CompilationModeFlag::initialize()) {
|
|
return JNI_ERR;
|
|
}
|
|
|
|
if (!check_vm_args_consistency()) {
|
|
return JNI_ERR;
|
|
}
|
|
|
|
|
|
#ifndef CAN_SHOW_REGISTERS_ON_ASSERT
|
|
UNSUPPORTED_OPTION(ShowRegistersOnAssert);
|
|
#endif // CAN_SHOW_REGISTERS_ON_ASSERT
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
// Helper class for controlling the lifetime of JavaVMInitArgs
|
|
// objects. The contents of the JavaVMInitArgs are guaranteed to be
|
|
// deleted on the destruction of the ScopedVMInitArgs object.
|
|
class ScopedVMInitArgs : public StackObj {
|
|
private:
|
|
JavaVMInitArgs _args;
|
|
char* _container_name;
|
|
bool _is_set;
|
|
char* _vm_options_file_arg;
|
|
|
|
public:
|
|
ScopedVMInitArgs(const char *container_name) {
|
|
_args.version = JNI_VERSION_1_2;
|
|
_args.nOptions = 0;
|
|
_args.options = nullptr;
|
|
_args.ignoreUnrecognized = false;
|
|
_container_name = (char *)container_name;
|
|
_is_set = false;
|
|
_vm_options_file_arg = nullptr;
|
|
}
|
|
|
|
// Populates the JavaVMInitArgs object represented by this
|
|
// ScopedVMInitArgs object with the arguments in options. The
|
|
// allocated memory is deleted by the destructor. If this method
|
|
// returns anything other than JNI_OK, then this object is in a
|
|
// partially constructed state, and should be abandoned.
|
|
jint set_args(const GrowableArrayView<JavaVMOption>* options) {
|
|
_is_set = true;
|
|
JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
|
|
JavaVMOption, options->length(), mtArguments);
|
|
if (options_arr == nullptr) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
_args.options = options_arr;
|
|
|
|
for (int i = 0; i < options->length(); i++) {
|
|
options_arr[i] = options->at(i);
|
|
options_arr[i].optionString = os::strdup(options_arr[i].optionString);
|
|
if (options_arr[i].optionString == nullptr) {
|
|
// Rely on the destructor to do cleanup.
|
|
_args.nOptions = i;
|
|
return JNI_ENOMEM;
|
|
}
|
|
}
|
|
|
|
_args.nOptions = options->length();
|
|
_args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
|
|
return JNI_OK;
|
|
}
|
|
|
|
JavaVMInitArgs* get() { return &_args; }
|
|
char* container_name() { return _container_name; }
|
|
bool is_set() { return _is_set; }
|
|
bool found_vm_options_file_arg() { return _vm_options_file_arg != nullptr; }
|
|
char* vm_options_file_arg() { return _vm_options_file_arg; }
|
|
|
|
void set_vm_options_file_arg(const char *vm_options_file_arg) {
|
|
if (_vm_options_file_arg != nullptr) {
|
|
os::free(_vm_options_file_arg);
|
|
}
|
|
_vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg);
|
|
}
|
|
|
|
~ScopedVMInitArgs() {
|
|
if (_vm_options_file_arg != nullptr) {
|
|
os::free(_vm_options_file_arg);
|
|
}
|
|
if (_args.options == nullptr) return;
|
|
for (int i = 0; i < _args.nOptions; i++) {
|
|
os::free(_args.options[i].optionString);
|
|
}
|
|
FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
|
|
}
|
|
|
|
// Insert options into this option list, to replace option at
|
|
// vm_options_file_pos (-XX:VMOptionsFile)
|
|
jint insert(const JavaVMInitArgs* args,
|
|
const JavaVMInitArgs* args_to_insert,
|
|
const int vm_options_file_pos) {
|
|
assert(_args.options == nullptr, "shouldn't be set yet");
|
|
assert(args_to_insert->nOptions != 0, "there should be args to insert");
|
|
assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
|
|
|
|
int length = args->nOptions + args_to_insert->nOptions - 1;
|
|
// Construct new option array
|
|
GrowableArrayCHeap<JavaVMOption, mtArguments> options(length);
|
|
for (int i = 0; i < args->nOptions; i++) {
|
|
if (i == vm_options_file_pos) {
|
|
// insert the new options starting at the same place as the
|
|
// -XX:VMOptionsFile option
|
|
for (int j = 0; j < args_to_insert->nOptions; j++) {
|
|
options.push(args_to_insert->options[j]);
|
|
}
|
|
} else {
|
|
options.push(args->options[i]);
|
|
}
|
|
}
|
|
// make into options array
|
|
return set_args(&options);
|
|
}
|
|
};
|
|
|
|
jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
|
|
return parse_options_environment_variable("_JAVA_OPTIONS", args);
|
|
}
|
|
|
|
jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
|
|
return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
|
|
}
|
|
|
|
static JavaVMOption* get_last_aotmode_arg(const JavaVMInitArgs* args) {
|
|
for (int index = args->nOptions - 1; index >= 0; index--) {
|
|
JavaVMOption* option = args->options + index;
|
|
if (strstr(option->optionString, "-XX:AOTMode=") == option->optionString) {
|
|
return option;
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
jint Arguments::parse_jdk_aot_vm_options_environment_variable(GrowableArrayCHeap<VMInitArgsGroup, mtArguments>* all_args,
|
|
ScopedVMInitArgs* jdk_aot_vm_options_args) {
|
|
// Don't bother scanning all the args if this env variable is not set
|
|
if (::getenv("JDK_AOT_VM_OPTIONS") == nullptr) {
|
|
return JNI_OK;
|
|
}
|
|
|
|
// Scan backwards and find the last occurrence of -XX:AOTMode=xxx, which will decide the value
|
|
// of AOTMode.
|
|
JavaVMOption* option = nullptr;
|
|
for (int i = all_args->length() - 1; i >= 0; i--) {
|
|
if ((option = get_last_aotmode_arg(all_args->at(i)._args)) != nullptr) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (option != nullptr) {
|
|
// We have found the last -XX:AOTMode=xxx. At this point <option> has NOT been parsed yet,
|
|
// so its value is not reflected inside the global variable AOTMode.
|
|
if (strcmp(option->optionString, "-XX:AOTMode=create") != 0) {
|
|
return JNI_OK; // Do not parse JDK_AOT_VM_OPTIONS
|
|
}
|
|
} else {
|
|
// -XX:AOTMode is not specified in any of 4 options_args, let's check AOTMode,
|
|
// which would have been set inside process_settings_file();
|
|
if (AOTMode == nullptr || strcmp(AOTMode, "create") != 0) {
|
|
return JNI_OK; // Do not parse JDK_AOT_VM_OPTIONS
|
|
}
|
|
}
|
|
|
|
return parse_options_environment_variable("JDK_AOT_VM_OPTIONS", jdk_aot_vm_options_args);
|
|
}
|
|
|
|
jint Arguments::parse_options_environment_variable(const char* name,
|
|
ScopedVMInitArgs* vm_args) {
|
|
char *buffer = ::getenv(name);
|
|
|
|
// Don't check this environment variable if user has special privileges
|
|
// (e.g. unix su command).
|
|
if (buffer == nullptr || os::have_special_privileges()) {
|
|
return JNI_OK;
|
|
}
|
|
|
|
if ((buffer = os::strdup(buffer)) == nullptr) {
|
|
return JNI_ENOMEM;
|
|
}
|
|
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Picked up %s: %s\n", name, buffer);
|
|
|
|
int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
|
|
|
|
os::free(buffer);
|
|
return retcode;
|
|
}
|
|
|
|
jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
|
|
// read file into buffer
|
|
int fd = ::open(file_name, O_RDONLY);
|
|
if (fd < 0) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Could not open options file '%s'\n",
|
|
file_name);
|
|
return JNI_ERR;
|
|
}
|
|
|
|
struct stat stbuf;
|
|
int retcode = os::stat(file_name, &stbuf);
|
|
if (retcode != 0) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Could not stat options file '%s'\n",
|
|
file_name);
|
|
::close(fd);
|
|
return JNI_ERR;
|
|
}
|
|
|
|
if (stbuf.st_size == 0) {
|
|
// tell caller there is no option data and that is ok
|
|
::close(fd);
|
|
return JNI_OK;
|
|
}
|
|
|
|
// '+ 1' for null termination even with max bytes
|
|
size_t bytes_alloc = stbuf.st_size + 1;
|
|
|
|
char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments);
|
|
if (nullptr == buf) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Could not allocate read buffer for options file parse\n");
|
|
::close(fd);
|
|
return JNI_ENOMEM;
|
|
}
|
|
|
|
memset(buf, 0, bytes_alloc);
|
|
|
|
// Fill buffer
|
|
ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
|
|
::close(fd);
|
|
if (bytes_read < 0) {
|
|
FREE_C_HEAP_ARRAY(char, buf);
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Could not read options file '%s'\n", file_name);
|
|
return JNI_ERR;
|
|
}
|
|
|
|
if (bytes_read == 0) {
|
|
// tell caller there is no option data and that is ok
|
|
FREE_C_HEAP_ARRAY(char, buf);
|
|
return JNI_OK;
|
|
}
|
|
|
|
retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
|
|
|
|
FREE_C_HEAP_ARRAY(char, buf);
|
|
return retcode;
|
|
}
|
|
|
|
jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
|
|
// Construct option array
|
|
GrowableArrayCHeap<JavaVMOption, mtArguments> options(2);
|
|
|
|
// some pointers to help with parsing
|
|
char *buffer_end = buffer + buf_len;
|
|
char *opt_hd = buffer;
|
|
char *wrt = buffer;
|
|
char *rd = buffer;
|
|
|
|
// parse all options
|
|
while (rd < buffer_end) {
|
|
// skip leading white space from the input string
|
|
while (rd < buffer_end && isspace((unsigned char) *rd)) {
|
|
rd++;
|
|
}
|
|
|
|
if (rd >= buffer_end) {
|
|
break;
|
|
}
|
|
|
|
// Remember this is where we found the head of the token.
|
|
opt_hd = wrt;
|
|
|
|
// Tokens are strings of non white space characters separated
|
|
// by one or more white spaces.
|
|
while (rd < buffer_end && !isspace((unsigned char) *rd)) {
|
|
if (*rd == '\'' || *rd == '"') { // handle a quoted string
|
|
int quote = *rd; // matching quote to look for
|
|
rd++; // don't copy open quote
|
|
while (rd < buffer_end && *rd != quote) {
|
|
// include everything (even spaces)
|
|
// up until the close quote
|
|
*wrt++ = *rd++; // copy to option string
|
|
}
|
|
|
|
if (rd < buffer_end) {
|
|
rd++; // don't copy close quote
|
|
} else {
|
|
// did not see closing quote
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Unmatched quote in %s\n", name);
|
|
return JNI_ERR;
|
|
}
|
|
} else {
|
|
*wrt++ = *rd++; // copy to option string
|
|
}
|
|
}
|
|
|
|
// steal a white space character and set it to null
|
|
*wrt++ = '\0';
|
|
// We now have a complete token
|
|
|
|
JavaVMOption option;
|
|
option.optionString = opt_hd;
|
|
option.extraInfo = nullptr;
|
|
|
|
options.append(option); // Fill in option
|
|
|
|
rd++; // Advance to next character
|
|
}
|
|
|
|
// Fill out JavaVMInitArgs structure.
|
|
return vm_args->set_args(&options);
|
|
}
|
|
|
|
#ifndef PRODUCT
|
|
// Determine whether LogVMOutput should be implicitly turned on.
|
|
static bool use_vm_log() {
|
|
if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
|
|
PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
|
|
PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
|
|
PrintAssembly || TraceDeoptimization ||
|
|
(VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
|
|
return true;
|
|
}
|
|
|
|
#ifdef COMPILER1
|
|
if (PrintC1Statistics) {
|
|
return true;
|
|
}
|
|
#endif // COMPILER1
|
|
|
|
#ifdef COMPILER2
|
|
if (PrintOptoAssembly || PrintOptoStatistics) {
|
|
return true;
|
|
}
|
|
#endif // COMPILER2
|
|
|
|
return false;
|
|
}
|
|
|
|
#endif // PRODUCT
|
|
|
|
bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) {
|
|
for (int index = 0; index < args->nOptions; index++) {
|
|
const JavaVMOption* option = args->options + index;
|
|
const char* tail;
|
|
if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
|
|
const char* vm_options_file,
|
|
const int vm_options_file_pos,
|
|
ScopedVMInitArgs* vm_options_file_args,
|
|
ScopedVMInitArgs* args_out) {
|
|
jint code = parse_vm_options_file(vm_options_file, vm_options_file_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
if (vm_options_file_args->get()->nOptions < 1) {
|
|
return JNI_OK;
|
|
}
|
|
|
|
if (args_contains_vm_options_file_arg(vm_options_file_args->get())) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"A VM options file may not refer to a VM options file. "
|
|
"Specification of '-XX:VMOptionsFile=<file-name>' in the "
|
|
"options file '%s' in options container '%s' is an error.\n",
|
|
vm_options_file_args->vm_options_file_arg(),
|
|
vm_options_file_args->container_name());
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
return args_out->insert(args, vm_options_file_args->get(),
|
|
vm_options_file_pos);
|
|
}
|
|
|
|
// Expand -XX:VMOptionsFile found in args_in as needed.
|
|
// mod_args and args_out parameters may return values as needed.
|
|
jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
|
|
ScopedVMInitArgs* mod_args,
|
|
JavaVMInitArgs** args_out) {
|
|
jint code = match_special_option_and_act(args_in, mod_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
if (mod_args->is_set()) {
|
|
// args_in contains -XX:VMOptionsFile and mod_args contains the
|
|
// original options from args_in along with the options expanded
|
|
// from the VMOptionsFile. Return a short-hand to the caller.
|
|
*args_out = mod_args->get();
|
|
} else {
|
|
*args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in
|
|
}
|
|
return JNI_OK;
|
|
}
|
|
|
|
jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
|
|
ScopedVMInitArgs* args_out) {
|
|
// Remaining part of option string
|
|
const char* tail;
|
|
ScopedVMInitArgs vm_options_file_args(args_out->container_name());
|
|
|
|
for (int index = 0; index < args->nOptions; index++) {
|
|
const JavaVMOption* option = args->options + index;
|
|
if (match_option(option, "-XX:Flags=", &tail)) {
|
|
Arguments::set_jvm_flags_file(tail);
|
|
continue;
|
|
}
|
|
if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
|
|
if (vm_options_file_args.found_vm_options_file_arg()) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"The option '%s' is already specified in the options "
|
|
"container '%s' so the specification of '%s' in the "
|
|
"same options container is an error.\n",
|
|
vm_options_file_args.vm_options_file_arg(),
|
|
vm_options_file_args.container_name(),
|
|
option->optionString);
|
|
return JNI_EINVAL;
|
|
}
|
|
vm_options_file_args.set_vm_options_file_arg(option->optionString);
|
|
// If there's a VMOptionsFile, parse that
|
|
jint code = insert_vm_options_file(args, tail, index,
|
|
&vm_options_file_args, args_out);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg());
|
|
if (args_out->is_set()) {
|
|
// The VMOptions file inserted some options so switch 'args'
|
|
// to the new set of options, and continue processing which
|
|
// preserves "last option wins" semantics.
|
|
args = args_out->get();
|
|
// The first option from the VMOptionsFile replaces the
|
|
// current option. So we back track to process the
|
|
// replacement option.
|
|
index--;
|
|
}
|
|
continue;
|
|
}
|
|
if (match_option(option, "-XX:+PrintVMOptions")) {
|
|
PrintVMOptions = true;
|
|
continue;
|
|
}
|
|
if (match_option(option, "-XX:-PrintVMOptions")) {
|
|
PrintVMOptions = false;
|
|
continue;
|
|
}
|
|
if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
|
|
IgnoreUnrecognizedVMOptions = true;
|
|
continue;
|
|
}
|
|
if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
|
|
IgnoreUnrecognizedVMOptions = false;
|
|
continue;
|
|
}
|
|
if (match_option(option, "-XX:+PrintFlagsInitial")) {
|
|
JVMFlag::printFlags(tty, false);
|
|
vm_exit(0);
|
|
}
|
|
|
|
#ifndef PRODUCT
|
|
if (match_option(option, "-XX:+PrintFlagsWithComments")) {
|
|
JVMFlag::printFlags(tty, true);
|
|
vm_exit(0);
|
|
}
|
|
#endif
|
|
}
|
|
return JNI_OK;
|
|
}
|
|
|
|
static void print_options(const JavaVMInitArgs *args) {
|
|
const char* tail;
|
|
for (int index = 0; index < args->nOptions; index++) {
|
|
const JavaVMOption *option = args->options + index;
|
|
if (match_option(option, "-XX:", &tail)) {
|
|
logOption(tail);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool Arguments::handle_deprecated_print_gc_flags() {
|
|
if (PrintGC) {
|
|
log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead.");
|
|
}
|
|
if (PrintGCDetails) {
|
|
log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead.");
|
|
}
|
|
|
|
if (_legacyGCLogging.lastFlag == 2) {
|
|
// -Xloggc was used to specify a filename
|
|
const char* gc_conf = PrintGCDetails ? "gc*" : "gc";
|
|
|
|
LogTarget(Error, logging) target;
|
|
LogStream errstream(target);
|
|
return LogConfiguration::parse_log_arguments(_legacyGCLogging.file, gc_conf, nullptr, nullptr, &errstream);
|
|
} else if (PrintGC || PrintGCDetails || (_legacyGCLogging.lastFlag == 1)) {
|
|
LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc));
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static void apply_debugger_ergo() {
|
|
#ifdef ASSERT
|
|
if (ReplayCompiles) {
|
|
FLAG_SET_ERGO_IF_DEFAULT(UseDebuggerErgo, true);
|
|
}
|
|
|
|
if (UseDebuggerErgo) {
|
|
// Turn on sub-flags
|
|
FLAG_SET_ERGO_IF_DEFAULT(UseDebuggerErgo1, true);
|
|
FLAG_SET_ERGO_IF_DEFAULT(UseDebuggerErgo2, true);
|
|
}
|
|
|
|
if (UseDebuggerErgo2) {
|
|
// Debugging with limited number of CPUs
|
|
FLAG_SET_ERGO_IF_DEFAULT(UseNUMA, false);
|
|
FLAG_SET_ERGO_IF_DEFAULT(ConcGCThreads, 1);
|
|
FLAG_SET_ERGO_IF_DEFAULT(ParallelGCThreads, 1);
|
|
FLAG_SET_ERGO_IF_DEFAULT(CICompilerCount, 2);
|
|
}
|
|
#endif // ASSERT
|
|
}
|
|
|
|
// Parse entry point called from JNI_CreateJavaVM
|
|
|
|
jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
|
|
assert(verify_special_jvm_flags(false), "deprecated and obsolete flag table inconsistent");
|
|
JVMFlag::check_all_flag_declarations();
|
|
|
|
// If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
|
|
const char* hotspotrc = ".hotspotrc";
|
|
bool settings_file_specified = false;
|
|
bool needs_hotspotrc_warning = false;
|
|
ScopedVMInitArgs initial_vm_options_args("");
|
|
ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
|
|
ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'");
|
|
ScopedVMInitArgs initial_jdk_aot_vm_options_args("env_var='JDK_AOT_VM_OPTIONS'");
|
|
|
|
// Pointers to current working set of containers
|
|
JavaVMInitArgs* cur_cmd_args;
|
|
JavaVMInitArgs* cur_vm_options_args;
|
|
JavaVMInitArgs* cur_java_options_args;
|
|
JavaVMInitArgs* cur_java_tool_options_args;
|
|
JavaVMInitArgs* cur_jdk_aot_vm_options_args;
|
|
|
|
// Containers for modified/expanded options
|
|
ScopedVMInitArgs mod_cmd_args("cmd_line_args");
|
|
ScopedVMInitArgs mod_vm_options_args("vm_options_args");
|
|
ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
|
|
ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'");
|
|
ScopedVMInitArgs mod_jdk_aot_vm_options_args("env_var='_JDK_AOT_VM_OPTIONS'");
|
|
|
|
GrowableArrayCHeap<VMInitArgsGroup, mtArguments> all_args;
|
|
|
|
jint code =
|
|
parse_java_tool_options_environment_variable(&initial_java_tool_options_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
// Yet another environment variable: _JAVA_OPTIONS. This mimics the classic VM.
|
|
// This is an undocumented feature.
|
|
code = parse_java_options_environment_variable(&initial_java_options_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
// Parse the options in the /java.base/jdk/internal/vm/options resource, if present
|
|
char *vmoptions = ClassLoader::lookup_vm_options();
|
|
if (vmoptions != nullptr) {
|
|
code = parse_options_buffer("vm options resource", vmoptions, strlen(vmoptions), &initial_vm_options_args);
|
|
FREE_C_HEAP_ARRAY(char, vmoptions);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
}
|
|
|
|
code = expand_vm_options_as_needed(initial_java_tool_options_args.get(),
|
|
&mod_java_tool_options_args,
|
|
&cur_java_tool_options_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
code = expand_vm_options_as_needed(initial_cmd_args,
|
|
&mod_cmd_args,
|
|
&cur_cmd_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
code = expand_vm_options_as_needed(initial_java_options_args.get(),
|
|
&mod_java_options_args,
|
|
&cur_java_options_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
code = expand_vm_options_as_needed(initial_vm_options_args.get(),
|
|
&mod_vm_options_args,
|
|
&cur_vm_options_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
const char* flags_file = Arguments::get_jvm_flags_file();
|
|
settings_file_specified = (flags_file != nullptr);
|
|
|
|
// Parse specified settings file (s) -- the effects are applied immediately into the JVM global flags.
|
|
if (settings_file_specified) {
|
|
if (!process_settings_file(flags_file, true,
|
|
IgnoreUnrecognizedVMOptions)) {
|
|
return JNI_EINVAL;
|
|
}
|
|
} else {
|
|
#ifdef ASSERT
|
|
// Parse default .hotspotrc settings file
|
|
if (!process_settings_file(".hotspotrc", false,
|
|
IgnoreUnrecognizedVMOptions)) {
|
|
return JNI_EINVAL;
|
|
}
|
|
#else
|
|
struct stat buf;
|
|
if (os::stat(hotspotrc, &buf) == 0) {
|
|
needs_hotspotrc_warning = true;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// The settings in the args are applied in this order to the the JVM global flags.
|
|
// For historical reasons, the order is DIFFERENT than the scanning order of
|
|
// the above expand_vm_options_as_needed() calls.
|
|
all_args.append({cur_vm_options_args, JVMFlagOrigin::JIMAGE_RESOURCE});
|
|
all_args.append({cur_java_tool_options_args, JVMFlagOrigin::ENVIRON_VAR});
|
|
all_args.append({cur_cmd_args, JVMFlagOrigin::COMMAND_LINE});
|
|
all_args.append({cur_java_options_args, JVMFlagOrigin::ENVIRON_VAR});
|
|
|
|
// JDK_AOT_VM_OPTIONS are parsed only if -XX:AOTMode=create has been detected from all
|
|
// the options that have been gathered above.
|
|
code = parse_jdk_aot_vm_options_environment_variable(&all_args, &initial_jdk_aot_vm_options_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
code = expand_vm_options_as_needed(initial_jdk_aot_vm_options_args.get(),
|
|
&mod_jdk_aot_vm_options_args,
|
|
&cur_jdk_aot_vm_options_args);
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
for (int index = 0; index < cur_jdk_aot_vm_options_args->nOptions; index++) {
|
|
JavaVMOption* option = cur_jdk_aot_vm_options_args->options + index;
|
|
const char* optionString = option->optionString;
|
|
if (strstr(optionString, "-XX:AOTMode=") == optionString &&
|
|
strcmp(optionString, "-XX:AOTMode=create") != 0) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Option %s cannot be specified in JDK_AOT_VM_OPTIONS\n", optionString);
|
|
return JNI_ERR;
|
|
}
|
|
}
|
|
|
|
all_args.append({cur_jdk_aot_vm_options_args, JVMFlagOrigin::ENVIRON_VAR});
|
|
|
|
if (IgnoreUnrecognizedVMOptions) {
|
|
// Note: unrecognized options in cur_vm_options_arg cannot be ignored. They are part of
|
|
// the JDK so it shouldn't have bad options.
|
|
cur_cmd_args->ignoreUnrecognized = true;
|
|
cur_java_tool_options_args->ignoreUnrecognized = true;
|
|
cur_java_options_args->ignoreUnrecognized = true;
|
|
cur_jdk_aot_vm_options_args->ignoreUnrecognized = true;
|
|
}
|
|
|
|
if (PrintVMOptions) {
|
|
// For historical reasons, options specified in cur_vm_options_arg and -XX:Flags are not printed.
|
|
print_options(cur_java_tool_options_args);
|
|
print_options(cur_cmd_args);
|
|
print_options(cur_java_options_args);
|
|
print_options(cur_jdk_aot_vm_options_args);
|
|
}
|
|
|
|
// Apply the settings in these args to the JVM global flags.
|
|
jint result = parse_vm_init_args(&all_args);
|
|
|
|
if (result != JNI_OK) {
|
|
return result;
|
|
}
|
|
|
|
// Delay warning until here so that we've had a chance to process
|
|
// the -XX:-PrintWarnings flag
|
|
if (needs_hotspotrc_warning) {
|
|
warning("%s file is present but has been ignored. "
|
|
"Run with -XX:Flags=%s to load the file.",
|
|
hotspotrc, hotspotrc);
|
|
}
|
|
|
|
if (needs_module_property_warning) {
|
|
warning("Ignoring system property options whose names match the '-Djdk.module.*'."
|
|
" names that are reserved for internal use.");
|
|
}
|
|
|
|
#if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
|
|
UNSUPPORTED_OPTION(UseLargePages);
|
|
#endif
|
|
|
|
#if defined(AIX)
|
|
UNSUPPORTED_OPTION_NULL(AllocateHeapAt);
|
|
#endif
|
|
|
|
#ifndef PRODUCT
|
|
if (TraceBytecodesAt != 0) {
|
|
TraceBytecodes = true;
|
|
}
|
|
#endif // PRODUCT
|
|
|
|
if (ScavengeRootsInCode == 0) {
|
|
if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
|
|
warning("Forcing ScavengeRootsInCode non-zero");
|
|
}
|
|
ScavengeRootsInCode = 1;
|
|
}
|
|
|
|
if (!handle_deprecated_print_gc_flags()) {
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
// Set object alignment values.
|
|
set_object_alignment();
|
|
|
|
#if !INCLUDE_CDS
|
|
if (CDSConfig::is_dumping_static_archive() || RequireSharedSpaces) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Shared spaces are not supported in this VM\n");
|
|
return JNI_ERR;
|
|
}
|
|
if (DumpLoadedClassList != nullptr) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"DumpLoadedClassList is not supported in this VM\n");
|
|
return JNI_ERR;
|
|
}
|
|
if ((CDSConfig::is_using_archive() && xshare_auto_cmd_line) ||
|
|
log_is_enabled(Info, cds) || log_is_enabled(Info, aot)) {
|
|
warning("Shared spaces are not supported in this VM");
|
|
UseSharedSpaces = false;
|
|
LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(cds));
|
|
LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(aot));
|
|
}
|
|
no_shared_spaces("CDS Disabled");
|
|
#endif // INCLUDE_CDS
|
|
|
|
// Verify NMT arguments
|
|
const NMT_TrackingLevel lvl = NMTUtil::parse_tracking_level(NativeMemoryTracking);
|
|
if (lvl == NMT_unknown) {
|
|
jio_fprintf(defaultStream::error_stream(),
|
|
"Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]\n");
|
|
return JNI_ERR;
|
|
}
|
|
if (PrintNMTStatistics && lvl == NMT_off) {
|
|
warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
|
|
FLAG_SET_DEFAULT(PrintNMTStatistics, false);
|
|
}
|
|
|
|
bool trace_dependencies = log_is_enabled(Debug, dependencies);
|
|
if (trace_dependencies && VerifyDependencies) {
|
|
warning("dependency logging results may be inflated by VerifyDependencies");
|
|
}
|
|
|
|
bool log_class_load_cause = log_is_enabled(Info, class, load, cause, native) ||
|
|
log_is_enabled(Info, class, load, cause);
|
|
if (log_class_load_cause && LogClassLoadingCauseFor == nullptr) {
|
|
warning("class load cause logging will not produce output without LogClassLoadingCauseFor");
|
|
}
|
|
|
|
apply_debugger_ergo();
|
|
|
|
// The VMThread needs to stop now and then to execute these debug options.
|
|
if ((HandshakeALot || SafepointALot) && FLAG_IS_DEFAULT(GuaranteedSafepointInterval)) {
|
|
FLAG_SET_DEFAULT(GuaranteedSafepointInterval, 1000);
|
|
}
|
|
|
|
if (log_is_enabled(Info, arguments)) {
|
|
LogStream st(Log(arguments)::info());
|
|
Arguments::print_on(&st);
|
|
}
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
void Arguments::set_compact_headers_flags() {
|
|
#ifdef _LP64
|
|
if (UseCompactObjectHeaders && FLAG_IS_CMDLINE(UseCompressedClassPointers) && !UseCompressedClassPointers) {
|
|
warning("Compact object headers require compressed class pointers. Disabling compact object headers.");
|
|
FLAG_SET_DEFAULT(UseCompactObjectHeaders, false);
|
|
}
|
|
if (UseCompactObjectHeaders && !UseObjectMonitorTable) {
|
|
// If UseCompactObjectHeaders is on the command line, turn on UseObjectMonitorTable.
|
|
if (FLAG_IS_CMDLINE(UseCompactObjectHeaders)) {
|
|
FLAG_SET_DEFAULT(UseObjectMonitorTable, true);
|
|
|
|
// If UseObjectMonitorTable is on the command line, turn off UseCompactObjectHeaders.
|
|
} else if (FLAG_IS_CMDLINE(UseObjectMonitorTable)) {
|
|
FLAG_SET_DEFAULT(UseCompactObjectHeaders, false);
|
|
// If neither on the command line, the defaults are incompatible, but turn on UseObjectMonitorTable.
|
|
} else {
|
|
FLAG_SET_DEFAULT(UseObjectMonitorTable, true);
|
|
}
|
|
}
|
|
if (UseCompactObjectHeaders && LockingMode != LM_LIGHTWEIGHT) {
|
|
FLAG_SET_DEFAULT(LockingMode, LM_LIGHTWEIGHT);
|
|
}
|
|
if (UseCompactObjectHeaders && !UseCompressedClassPointers) {
|
|
FLAG_SET_DEFAULT(UseCompressedClassPointers, true);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
jint Arguments::apply_ergo() {
|
|
// Set flags based on ergonomics.
|
|
jint result = set_ergonomics_flags();
|
|
if (result != JNI_OK) return result;
|
|
|
|
// Set heap size based on available physical memory
|
|
set_heap_size();
|
|
|
|
GCConfig::arguments()->initialize();
|
|
|
|
set_compact_headers_flags();
|
|
|
|
if (UseCompressedClassPointers) {
|
|
CompressedKlassPointers::pre_initialize();
|
|
}
|
|
|
|
CDSConfig::ergo_initialize();
|
|
|
|
// Initialize Metaspace flags and alignments
|
|
Metaspace::ergo_initialize();
|
|
|
|
if (!StringDedup::ergo_initialize()) {
|
|
return JNI_EINVAL;
|
|
}
|
|
|
|
// Set compiler flags after GC is selected and GC specific
|
|
// flags (LoopStripMiningIter) are set.
|
|
CompilerConfig::ergo_initialize();
|
|
|
|
// Set bytecode rewriting flags
|
|
set_bytecode_flags();
|
|
|
|
// Set flags if aggressive optimization flags are enabled
|
|
jint code = set_aggressive_opts_flags();
|
|
if (code != JNI_OK) {
|
|
return code;
|
|
}
|
|
|
|
if (FLAG_IS_DEFAULT(UseSecondarySupersTable)) {
|
|
FLAG_SET_DEFAULT(UseSecondarySupersTable, VM_Version::supports_secondary_supers_table());
|
|
} else if (UseSecondarySupersTable && !VM_Version::supports_secondary_supers_table()) {
|
|
warning("UseSecondarySupersTable is not supported");
|
|
FLAG_SET_DEFAULT(UseSecondarySupersTable, false);
|
|
}
|
|
if (!UseSecondarySupersTable) {
|
|
FLAG_SET_DEFAULT(StressSecondarySupers, false);
|
|
FLAG_SET_DEFAULT(VerifySecondarySupers, false);
|
|
}
|
|
|
|
#ifdef ZERO
|
|
// Clear flags not supported on zero.
|
|
FLAG_SET_DEFAULT(ProfileInterpreter, false);
|
|
#endif // ZERO
|
|
|
|
if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
|
|
warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
|
|
DebugNonSafepoints = true;
|
|
}
|
|
|
|
if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
|
|
warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
|
|
}
|
|
|
|
// Treat the odd case where local verification is enabled but remote
|
|
// verification is not as if both were enabled.
|
|
if (BytecodeVerificationLocal && !BytecodeVerificationRemote) {
|
|
log_info(verification)("Turning on remote verification because local verification is on");
|
|
FLAG_SET_DEFAULT(BytecodeVerificationRemote, true);
|
|
}
|
|
|
|
#ifndef PRODUCT
|
|
if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
|
|
if (use_vm_log()) {
|
|
LogVMOutput = true;
|
|
}
|
|
}
|
|
#endif // PRODUCT
|
|
|
|
if (PrintCommandLineFlags) {
|
|
JVMFlag::printSetFlags(tty);
|
|
}
|
|
|
|
#if COMPILER2_OR_JVMCI
|
|
if (!FLAG_IS_DEFAULT(EnableVectorSupport) && !EnableVectorSupport) {
|
|
if (!FLAG_IS_DEFAULT(EnableVectorReboxing) && EnableVectorReboxing) {
|
|
warning("Disabling EnableVectorReboxing since EnableVectorSupport is turned off.");
|
|
}
|
|
FLAG_SET_DEFAULT(EnableVectorReboxing, false);
|
|
|
|
if (!FLAG_IS_DEFAULT(EnableVectorAggressiveReboxing) && EnableVectorAggressiveReboxing) {
|
|
if (!EnableVectorReboxing) {
|
|
warning("Disabling EnableVectorAggressiveReboxing since EnableVectorReboxing is turned off.");
|
|
} else {
|
|
warning("Disabling EnableVectorAggressiveReboxing since EnableVectorSupport is turned off.");
|
|
}
|
|
}
|
|
FLAG_SET_DEFAULT(EnableVectorAggressiveReboxing, false);
|
|
}
|
|
#endif // COMPILER2_OR_JVMCI
|
|
|
|
#ifdef COMPILER2
|
|
if (!FLAG_IS_DEFAULT(UseLoopPredicate) && !UseLoopPredicate && UseProfiledLoopPredicate) {
|
|
warning("Disabling UseProfiledLoopPredicate since UseLoopPredicate is turned off.");
|
|
FLAG_SET_ERGO(UseProfiledLoopPredicate, false);
|
|
}
|
|
#endif // COMPILER2
|
|
|
|
if (log_is_enabled(Info, perf, class, link)) {
|
|
if (!UsePerfData) {
|
|
warning("Disabling -Xlog:perf+class+link since UsePerfData is turned off.");
|
|
LogConfiguration::disable_tags(false, LOG_TAGS(perf, class, link));
|
|
assert(!log_is_enabled(Info, perf, class, link), "sanity");
|
|
}
|
|
}
|
|
|
|
if (FLAG_IS_CMDLINE(DiagnoseSyncOnValueBasedClasses)) {
|
|
if (DiagnoseSyncOnValueBasedClasses == ObjectSynchronizer::LOG_WARNING && !log_is_enabled(Info, valuebasedclasses)) {
|
|
LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(valuebasedclasses));
|
|
}
|
|
}
|
|
return JNI_OK;
|
|
}
|
|
|
|
jint Arguments::adjust_after_os() {
|
|
if (UseNUMA) {
|
|
if (UseParallelGC) {
|
|
if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
|
|
FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
|
|
}
|
|
}
|
|
}
|
|
return JNI_OK;
|
|
}
|
|
|
|
int Arguments::PropertyList_count(SystemProperty* pl) {
|
|
int count = 0;
|
|
while(pl != nullptr) {
|
|
count++;
|
|
pl = pl->next();
|
|
}
|
|
return count;
|
|
}
|
|
|
|
// Return the number of readable properties.
|
|
int Arguments::PropertyList_readable_count(SystemProperty* pl) {
|
|
int count = 0;
|
|
while(pl != nullptr) {
|
|
if (pl->readable()) {
|
|
count++;
|
|
}
|
|
pl = pl->next();
|
|
}
|
|
return count;
|
|
}
|
|
|
|
const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
|
|
assert(key != nullptr, "just checking");
|
|
SystemProperty* prop;
|
|
for (prop = pl; prop != nullptr; prop = prop->next()) {
|
|
if (strcmp(key, prop->key()) == 0) return prop->value();
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// Return the value of the requested property provided that it is a readable property.
|
|
const char* Arguments::PropertyList_get_readable_value(SystemProperty *pl, const char* key) {
|
|
assert(key != nullptr, "just checking");
|
|
SystemProperty* prop;
|
|
// Return the property value if the keys match and the property is not internal or
|
|
// it's the special internal property "jdk.boot.class.path.append".
|
|
for (prop = pl; prop != nullptr; prop = prop->next()) {
|
|
if (strcmp(key, prop->key()) == 0) {
|
|
if (!prop->internal()) {
|
|
return prop->value();
|
|
} else if (strcmp(key, "jdk.boot.class.path.append") == 0) {
|
|
return prop->value();
|
|
} else {
|
|
// Property is internal and not jdk.boot.class.path.append so return null.
|
|
return nullptr;
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
|
|
SystemProperty* p = *plist;
|
|
if (p == nullptr) {
|
|
*plist = new_p;
|
|
} else {
|
|
while (p->next() != nullptr) {
|
|
p = p->next();
|
|
}
|
|
p->set_next(new_p);
|
|
}
|
|
}
|
|
|
|
void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v,
|
|
bool writeable, bool internal) {
|
|
if (plist == nullptr)
|
|
return;
|
|
|
|
SystemProperty* new_p = new SystemProperty(k, v, writeable, internal);
|
|
PropertyList_add(plist, new_p);
|
|
}
|
|
|
|
void Arguments::PropertyList_add(SystemProperty *element) {
|
|
PropertyList_add(&_system_properties, element);
|
|
}
|
|
|
|
// This add maintains unique property key in the list.
|
|
void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
|
|
PropertyAppendable append, PropertyWriteable writeable,
|
|
PropertyInternal internal) {
|
|
if (plist == nullptr)
|
|
return;
|
|
|
|
// If property key exists and is writeable, then update with new value.
|
|
// Trying to update a non-writeable property is silently ignored.
|
|
SystemProperty* prop;
|
|
for (prop = *plist; prop != nullptr; prop = prop->next()) {
|
|
if (strcmp(k, prop->key()) == 0) {
|
|
if (append == AppendProperty) {
|
|
prop->append_writeable_value(v);
|
|
} else {
|
|
prop->set_writeable_value(v);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
PropertyList_add(plist, k, v, writeable == WriteableProperty, internal == InternalProperty);
|
|
}
|
|
|
|
// Copies src into buf, replacing "%%" with "%" and "%p" with pid
|
|
// Returns true if all of the source pointed by src has been copied over to
|
|
// the destination buffer pointed by buf. Otherwise, returns false.
|
|
// Notes:
|
|
// 1. If the length (buflen) of the destination buffer excluding the
|
|
// null terminator character is not long enough for holding the expanded
|
|
// pid characters, it also returns false instead of returning the partially
|
|
// expanded one.
|
|
// 2. The passed in "buflen" should be large enough to hold the null terminator.
|
|
bool Arguments::copy_expand_pid(const char* src, size_t srclen,
|
|
char* buf, size_t buflen) {
|
|
const char* p = src;
|
|
char* b = buf;
|
|
const char* src_end = &src[srclen];
|
|
char* buf_end = &buf[buflen - 1];
|
|
|
|
while (p < src_end && b < buf_end) {
|
|
if (*p == '%') {
|
|
switch (*(++p)) {
|
|
case '%': // "%%" ==> "%"
|
|
*b++ = *p++;
|
|
break;
|
|
case 'p': { // "%p" ==> current process id
|
|
// buf_end points to the character before the last character so
|
|
// that we could write '\0' to the end of the buffer.
|
|
size_t buf_sz = buf_end - b + 1;
|
|
int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
|
|
|
|
// if jio_snprintf fails or the buffer is not long enough to hold
|
|
// the expanded pid, returns false.
|
|
if (ret < 0 || ret >= (int)buf_sz) {
|
|
return false;
|
|
} else {
|
|
b += ret;
|
|
assert(*b == '\0', "fail in copy_expand_pid");
|
|
if (p == src_end && b == buf_end + 1) {
|
|
// reach the end of the buffer.
|
|
return true;
|
|
}
|
|
}
|
|
p++;
|
|
break;
|
|
}
|
|
default :
|
|
*b++ = '%';
|
|
}
|
|
} else {
|
|
*b++ = *p++;
|
|
}
|
|
}
|
|
*b = '\0';
|
|
return (p == src_end); // return false if not all of the source was copied
|
|
}
|