mirror of
https://github.com/openjdk/jdk.git
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564 lines
23 KiB
C++
564 lines
23 KiB
C++
/*
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* Copyright (c) 1997, 2023, 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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#ifndef SHARE_RUNTIME_ARGUMENTS_HPP
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#define SHARE_RUNTIME_ARGUMENTS_HPP
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#include "logging/logLevel.hpp"
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#include "logging/logTag.hpp"
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#include "memory/allStatic.hpp"
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#include "memory/allocation.hpp"
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#include "runtime/globals.hpp"
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#include "runtime/java.hpp"
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#include "runtime/os.hpp"
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#include "utilities/debug.hpp"
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#include "utilities/vmEnums.hpp"
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// Arguments parses the command line and recognizes options
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class JVMFlag;
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// Invocation API hook typedefs (these should really be defined in jni.h)
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extern "C" {
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typedef void (JNICALL *abort_hook_t)(void);
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typedef void (JNICALL *exit_hook_t)(jint code);
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typedef jint (JNICALL *vfprintf_hook_t)(FILE *fp, const char *format, va_list args) ATTRIBUTE_PRINTF(2, 0);
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}
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// Obsolete or deprecated -XX flag.
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struct SpecialFlag {
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const char* name;
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JDK_Version deprecated_in; // When the deprecation warning started (or "undefined").
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JDK_Version obsolete_in; // When the obsolete warning started (or "undefined").
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JDK_Version expired_in; // When the option expires (or "undefined").
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};
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struct LegacyGCLogging {
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const char* file; // null -> stdout
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int lastFlag; // 0 not set; 1 -> -verbose:gc; 2 -> -Xloggc
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};
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// PathString is used as:
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// - the underlying value for a SystemProperty
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// - the path portion of an --patch-module module/path pair
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// - the string that represents the boot class path, Arguments::_boot_class_path.
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class PathString : public CHeapObj<mtArguments> {
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protected:
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char* _value;
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public:
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char* value() const { return _value; }
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// return false iff OOM && alloc_failmode == AllocFailStrategy::RETURN_NULL
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bool set_value(const char *value, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM);
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void append_value(const char *value);
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PathString(const char* value);
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~PathString();
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// for JVM_ReadSystemPropertiesInfo
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static int value_offset_in_bytes() { return (int)offset_of(PathString, _value); }
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};
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// ModulePatchPath records the module/path pair as specified to --patch-module.
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class ModulePatchPath : public CHeapObj<mtInternal> {
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private:
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char* _module_name;
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PathString* _path;
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public:
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ModulePatchPath(const char* module_name, const char* path);
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~ModulePatchPath();
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inline const char* module_name() const { return _module_name; }
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inline char* path_string() const { return _path->value(); }
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};
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// Element describing System and User (-Dkey=value flags) defined property.
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//
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// An internal SystemProperty is one that has been removed in
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// jdk.internal.VM.saveAndRemoveProperties, like jdk.boot.class.path.append.
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//
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class SystemProperty : public PathString {
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private:
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char* _key;
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SystemProperty* _next;
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bool _internal;
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bool _writeable;
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public:
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// Accessors
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char* value() const { return PathString::value(); }
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const char* key() const { return _key; }
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bool internal() const { return _internal; }
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SystemProperty* next() const { return _next; }
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void set_next(SystemProperty* next) { _next = next; }
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bool writeable() const { return _writeable; }
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bool readable() const {
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return !_internal || (strcmp(_key, "jdk.boot.class.path.append") == 0 &&
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value() != nullptr);
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}
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// A system property should only have its value set
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// via an external interface if it is a writeable property.
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// The internal, non-writeable property jdk.boot.class.path.append
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// is the only exception to this rule. It can be set externally
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// via -Xbootclasspath/a or JVMTI OnLoad phase call to AddToBootstrapClassLoaderSearch.
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// In those cases for jdk.boot.class.path.append, the base class
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// set_value and append_value methods are called directly.
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void set_writeable_value(const char *value) {
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if (writeable()) {
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set_value(value);
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}
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}
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void append_writeable_value(const char *value) {
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if (writeable()) {
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append_value(value);
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}
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}
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// Constructor
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SystemProperty(const char* key, const char* value, bool writeable, bool internal = false);
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// for JVM_ReadSystemPropertiesInfo
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static int key_offset_in_bytes() { return (int)offset_of(SystemProperty, _key); }
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static int next_offset_in_bytes() { return (int)offset_of(SystemProperty, _next); }
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};
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// Helper class for controlling the lifetime of JavaVMInitArgs objects.
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class ScopedVMInitArgs;
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class Arguments : AllStatic {
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friend class VMStructs;
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friend class JvmtiExport;
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friend class CodeCacheExtensions;
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friend class ArgumentsTest;
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friend class LargeOptionsTest;
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public:
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// Operation modi
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enum Mode {
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_int, // corresponds to -Xint
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_mixed, // corresponds to -Xmixed
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_comp // corresponds to -Xcomp
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};
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enum ArgsRange {
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arg_unreadable = -3,
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arg_too_small = -2,
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arg_too_big = -1,
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arg_in_range = 0
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};
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enum PropertyAppendable {
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AppendProperty,
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AddProperty
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};
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enum PropertyWriteable {
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WriteableProperty,
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UnwriteableProperty
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};
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enum PropertyInternal {
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InternalProperty,
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ExternalProperty
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};
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private:
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// a pointer to the flags file name if it is specified
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static char* _jvm_flags_file;
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// an array containing all flags specified in the .hotspotrc file
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static char** _jvm_flags_array;
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static int _num_jvm_flags;
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// an array containing all jvm arguments specified in the command line
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static char** _jvm_args_array;
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static int _num_jvm_args;
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// string containing all java command (class/jarfile name and app args)
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static char* _java_command;
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// Property list
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static SystemProperty* _system_properties;
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// Quick accessor to System properties in the list:
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static SystemProperty *_sun_boot_library_path;
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static SystemProperty *_java_library_path;
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static SystemProperty *_java_home;
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static SystemProperty *_java_class_path;
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static SystemProperty *_jdk_boot_class_path_append;
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static SystemProperty *_vm_info;
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// --patch-module=module=<file>(<pathsep><file>)*
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// Each element contains the associated module name, path
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// string pair as specified to --patch-module.
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static GrowableArray<ModulePatchPath*>* _patch_mod_prefix;
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// The constructed value of the system class path after
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// argument processing and JVMTI OnLoad additions via
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// calls to AddToBootstrapClassLoaderSearch. This is the
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// final form before ClassLoader::setup_bootstrap_search().
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// Note: since --patch-module is a module name/path pair, the
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// boot class path string no longer contains the "prefix"
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// to the boot class path base piece as it did when
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// -Xbootclasspath/p was supported.
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static PathString* _boot_class_path;
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// Set if a modular java runtime image is present vs. a build with exploded modules
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static bool _has_jimage;
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// temporary: to emit warning if the default ext dirs are not empty.
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// remove this variable when the warning is no longer needed.
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static char* _ext_dirs;
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// java.vendor.url.bug, bug reporting URL for fatal errors.
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static const char* _java_vendor_url_bug;
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// sun.java.launcher, private property to provide information about
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// java launcher
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static const char* _sun_java_launcher;
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// was this VM created via the -XXaltjvm=<path> option
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static bool _sun_java_launcher_is_altjvm;
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// for legacy gc options (-verbose:gc and -Xloggc:)
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static LegacyGCLogging _legacyGCLogging;
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// Value of the conservative maximum heap alignment needed
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static size_t _conservative_max_heap_alignment;
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// Operation modi
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static Mode _mode;
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static void set_mode_flags(Mode mode);
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// preview features
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static bool _enable_preview;
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// Used to save default settings
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static bool _AlwaysCompileLoopMethods;
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static bool _UseOnStackReplacement;
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static bool _BackgroundCompilation;
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static bool _ClipInlining;
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// GC ergonomics
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static void set_conservative_max_heap_alignment();
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static void set_use_compressed_oops();
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static void set_use_compressed_klass_ptrs();
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static jint set_ergonomics_flags();
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static void set_shared_spaces_flags_and_archive_paths();
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// Limits the given heap size by the maximum amount of virtual
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// memory this process is currently allowed to use. It also takes
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// the virtual-to-physical ratio of the current GC into account.
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static size_t limit_heap_by_allocatable_memory(size_t size);
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// Setup heap size
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static void set_heap_size();
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// Bytecode rewriting
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static void set_bytecode_flags();
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// Invocation API hooks
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static abort_hook_t _abort_hook;
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static exit_hook_t _exit_hook;
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static vfprintf_hook_t _vfprintf_hook;
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// System properties
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static bool add_property(const char* prop, PropertyWriteable writeable=WriteableProperty,
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PropertyInternal internal=ExternalProperty);
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// Used for module system related properties: converted from command-line flags.
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// Basic properties are writeable as they operate as "last one wins" and will get overwritten.
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// Numbered properties are never writeable, and always internal.
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static bool create_module_property(const char* prop_name, const char* prop_value, PropertyInternal internal);
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static bool create_numbered_module_property(const char* prop_base_name, const char* prop_value, unsigned int count);
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static int process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase);
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// Aggressive optimization flags.
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static jint set_aggressive_opts_flags();
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static jint set_aggressive_heap_flags();
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// Argument parsing
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static bool parse_argument(const char* arg, JVMFlagOrigin origin);
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static bool process_argument(const char* arg, jboolean ignore_unrecognized, JVMFlagOrigin origin);
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static void process_java_launcher_argument(const char*, void*);
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static jint parse_options_environment_variable(const char* name, ScopedVMInitArgs* vm_args);
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static jint parse_java_tool_options_environment_variable(ScopedVMInitArgs* vm_args);
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static jint parse_java_options_environment_variable(ScopedVMInitArgs* vm_args);
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static jint parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args);
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static jint parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args);
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static jint parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize);
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static jint insert_vm_options_file(const JavaVMInitArgs* args,
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const char* vm_options_file,
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const int vm_options_file_pos,
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ScopedVMInitArgs* vm_options_file_args,
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ScopedVMInitArgs* args_out);
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static bool args_contains_vm_options_file_arg(const JavaVMInitArgs* args);
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static jint expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
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ScopedVMInitArgs* mod_args,
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JavaVMInitArgs** args_out);
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static jint match_special_option_and_act(const JavaVMInitArgs* args,
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ScopedVMInitArgs* args_out);
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static bool handle_deprecated_print_gc_flags();
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static jint parse_vm_init_args(const JavaVMInitArgs *vm_options_args,
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const JavaVMInitArgs *java_tool_options_args,
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const JavaVMInitArgs *java_options_args,
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const JavaVMInitArgs *cmd_line_args);
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static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, JVMFlagOrigin origin);
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static jint finalize_vm_init_args(bool patch_mod_javabase);
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static bool is_bad_option(const JavaVMOption* option, jboolean ignore, const char* option_type);
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static bool is_bad_option(const JavaVMOption* option, jboolean ignore) {
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return is_bad_option(option, ignore, nullptr);
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}
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static void describe_range_error(ArgsRange errcode);
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static ArgsRange check_memory_size(julong size, julong min_size, julong max_size);
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static ArgsRange parse_memory_size(const char* s, julong* long_arg,
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julong min_size, julong max_size = max_uintx);
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// methods to build strings from individual args
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static void build_jvm_args(const char* arg);
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static void build_jvm_flags(const char* arg);
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static void add_string(char*** bldarray, int* count, const char* arg);
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static const char* build_resource_string(char** args, int count);
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// Returns true if the flag is obsolete (and not yet expired).
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// In this case the 'version' buffer is filled in with
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// the version number when the flag became obsolete.
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static bool is_obsolete_flag(const char* flag_name, JDK_Version* version);
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// Returns 1 if the flag is deprecated (and not yet obsolete or expired).
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// In this case the 'version' buffer is filled in with the version number when
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// the flag became deprecated.
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// Returns -1 if the flag is expired or obsolete.
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// Returns 0 otherwise.
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static int is_deprecated_flag(const char* flag_name, JDK_Version* version);
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// Return the real name for the flag passed on the command line (either an alias name or "flag_name").
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static const char* real_flag_name(const char *flag_name);
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static JVMFlag* find_jvm_flag(const char* name, size_t name_length);
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// Return the "real" name for option arg if arg is an alias, and print a warning if arg is deprecated.
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// Return nullptr if the arg has expired.
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static const char* handle_aliases_and_deprecation(const char* arg);
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static char* _default_shared_archive_path;
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static char* SharedArchivePath;
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static char* SharedDynamicArchivePath;
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static size_t _default_SharedBaseAddress; // The default value specified in globals.hpp
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static void extract_shared_archive_paths(const char* archive_path,
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char** base_archive_path,
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char** top_archive_path) NOT_CDS_RETURN;
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public:
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static int num_archives(const char* archive_path) NOT_CDS_RETURN_(0);
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// Parses the arguments, first phase
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static jint parse(const JavaVMInitArgs* args);
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// Parse a string for a unsigned integer. Returns true if value
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// is an unsigned integer greater than or equal to the minimum
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// parameter passed and returns the value in uint_arg. Returns
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// false otherwise, with uint_arg undefined.
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static bool parse_uint(const char* value, uint* uintx_arg,
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uint min_size);
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// Apply ergonomics
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static jint apply_ergo();
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// Adjusts the arguments after the OS have adjusted the arguments
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static jint adjust_after_os();
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// Check consistency or otherwise of VM argument settings
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static bool check_vm_args_consistency();
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// Used by os_solaris
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static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized);
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static size_t conservative_max_heap_alignment() { return _conservative_max_heap_alignment; }
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// Return the maximum size a heap with compressed oops can take
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static size_t max_heap_for_compressed_oops();
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// return a char* array containing all options
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static char** jvm_flags_array() { return _jvm_flags_array; }
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static char** jvm_args_array() { return _jvm_args_array; }
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static int num_jvm_flags() { return _num_jvm_flags; }
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static int num_jvm_args() { return _num_jvm_args; }
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// return the arguments passed to the Java application
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static const char* java_command() { return _java_command; }
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// print jvm_flags, jvm_args and java_command
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static void print_on(outputStream* st);
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static void print_summary_on(outputStream* st);
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// convenient methods to get and set jvm_flags_file
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static const char* get_jvm_flags_file() { return _jvm_flags_file; }
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static void set_jvm_flags_file(const char *value) {
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if (_jvm_flags_file != nullptr) {
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os::free(_jvm_flags_file);
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}
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_jvm_flags_file = os::strdup_check_oom(value);
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}
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// convenient methods to obtain / print jvm_flags and jvm_args
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static const char* jvm_flags() { return build_resource_string(_jvm_flags_array, _num_jvm_flags); }
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static const char* jvm_args() { return build_resource_string(_jvm_args_array, _num_jvm_args); }
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static void print_jvm_flags_on(outputStream* st);
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static void print_jvm_args_on(outputStream* st);
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// -Dkey=value flags
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static SystemProperty* system_properties() { return _system_properties; }
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static const char* get_property(const char* key);
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// -Djava.vendor.url.bug
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static const char* java_vendor_url_bug() { return _java_vendor_url_bug; }
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// -Dsun.java.launcher
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static const char* sun_java_launcher() { return _sun_java_launcher; }
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// Was VM created by a Java launcher?
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static bool created_by_java_launcher();
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// -Dsun.java.launcher.is_altjvm
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static bool sun_java_launcher_is_altjvm();
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// abort, exit, vfprintf hooks
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static abort_hook_t abort_hook() { return _abort_hook; }
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static exit_hook_t exit_hook() { return _exit_hook; }
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static vfprintf_hook_t vfprintf_hook() { return _vfprintf_hook; }
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static const char* GetSharedArchivePath() { return SharedArchivePath; }
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static const char* GetSharedDynamicArchivePath() { return SharedDynamicArchivePath; }
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static size_t default_SharedBaseAddress() { return _default_SharedBaseAddress; }
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// Java launcher properties
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static void process_sun_java_launcher_properties(JavaVMInitArgs* args);
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// System properties
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static void init_system_properties();
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// Update/Initialize System properties after JDK version number is known
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static void init_version_specific_system_properties();
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// Update VM info property - called after argument parsing
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static void update_vm_info_property(const char* vm_info) {
|
|
_vm_info->set_value(vm_info);
|
|
}
|
|
|
|
// Property List manipulation
|
|
static void PropertyList_add(SystemProperty *element);
|
|
static void PropertyList_add(SystemProperty** plist, SystemProperty *element);
|
|
static void PropertyList_add(SystemProperty** plist, const char* k, const char* v, bool writeable, bool internal);
|
|
|
|
static void PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
|
|
PropertyAppendable append, PropertyWriteable writeable,
|
|
PropertyInternal internal);
|
|
static const char* PropertyList_get_value(SystemProperty* plist, const char* key);
|
|
static const char* PropertyList_get_readable_value(SystemProperty* plist, const char* key);
|
|
static int PropertyList_count(SystemProperty* pl);
|
|
static int PropertyList_readable_count(SystemProperty* pl);
|
|
|
|
static bool is_internal_module_property(const char* option);
|
|
|
|
// Miscellaneous System property value getter and setters.
|
|
static void set_dll_dir(const char *value) { _sun_boot_library_path->set_value(value); }
|
|
static void set_java_home(const char *value) { _java_home->set_value(value); }
|
|
static void set_library_path(const char *value) { _java_library_path->set_value(value); }
|
|
static void set_ext_dirs(char *value) { _ext_dirs = os::strdup_check_oom(value); }
|
|
|
|
// Set up the underlying pieces of the boot class path
|
|
static void add_patch_mod_prefix(const char *module_name, const char *path, bool* patch_mod_javabase);
|
|
static void set_boot_class_path(const char *value, bool has_jimage) {
|
|
// During start up, set by os::set_boot_path()
|
|
assert(get_boot_class_path() == nullptr, "Boot class path previously set");
|
|
_boot_class_path->set_value(value);
|
|
_has_jimage = has_jimage;
|
|
}
|
|
static void append_sysclasspath(const char *value) {
|
|
_boot_class_path->append_value(value);
|
|
_jdk_boot_class_path_append->append_value(value);
|
|
}
|
|
|
|
static GrowableArray<ModulePatchPath*>* get_patch_mod_prefix() { return _patch_mod_prefix; }
|
|
static char* get_boot_class_path() { return _boot_class_path->value(); }
|
|
static bool has_jimage() { return _has_jimage; }
|
|
|
|
static char* get_java_home() { return _java_home->value(); }
|
|
static char* get_dll_dir() { return _sun_boot_library_path->value(); }
|
|
static char* get_appclasspath() { return _java_class_path->value(); }
|
|
static void fix_appclasspath();
|
|
|
|
static char* get_default_shared_archive_path() NOT_CDS_RETURN_(nullptr);
|
|
static void init_shared_archive_paths() NOT_CDS_RETURN;
|
|
|
|
// Operation modi
|
|
static Mode mode() { return _mode; }
|
|
static bool is_interpreter_only() { return mode() == _int; }
|
|
static bool is_compiler_only() { return mode() == _comp; }
|
|
|
|
|
|
// preview features
|
|
static void set_enable_preview() { _enable_preview = true; }
|
|
static bool enable_preview() { return _enable_preview; }
|
|
|
|
// Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid.
|
|
static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen);
|
|
|
|
static void check_unsupported_dumping_properties() NOT_CDS_RETURN;
|
|
|
|
static bool check_unsupported_cds_runtime_properties() NOT_CDS_RETURN0;
|
|
|
|
static bool atojulong(const char *s, julong* result);
|
|
|
|
static bool has_jfr_option() NOT_JFR_RETURN_(false);
|
|
|
|
DEBUG_ONLY(static bool verify_special_jvm_flags(bool check_globals);)
|
|
};
|
|
|
|
// Disable options not supported in this release, with a warning if they
|
|
// were explicitly requested on the command-line
|
|
#define UNSUPPORTED_OPTION(opt) \
|
|
do { \
|
|
if (opt) { \
|
|
if (FLAG_IS_CMDLINE(opt)) { \
|
|
warning("-XX:+" #opt " not supported in this VM"); \
|
|
} \
|
|
FLAG_SET_DEFAULT(opt, false); \
|
|
} \
|
|
} while(0)
|
|
|
|
// similar to UNSUPPORTED_OPTION but sets flag to nullptr
|
|
#define UNSUPPORTED_OPTION_NULL(opt) \
|
|
do { \
|
|
if (opt) { \
|
|
if (FLAG_IS_CMDLINE(opt)) { \
|
|
warning("-XX flag " #opt " not supported in this VM"); \
|
|
} \
|
|
FLAG_SET_DEFAULT(opt, nullptr); \
|
|
} \
|
|
} while(0)
|
|
|
|
// Initialize options not supported in this release, with a warning
|
|
// if they were explicitly requested on the command-line
|
|
#define UNSUPPORTED_OPTION_INIT(opt, value) \
|
|
do { \
|
|
if (FLAG_IS_CMDLINE(opt)) { \
|
|
warning("-XX flag " #opt " not supported in this VM"); \
|
|
} \
|
|
FLAG_SET_DEFAULT(opt, value); \
|
|
} while(0)
|
|
|
|
#endif // SHARE_RUNTIME_ARGUMENTS_HPP
|