| /* |
| * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "classfile/classLoader.hpp" |
| #include "classfile/javaAssertions.hpp" |
| #include "classfile/stringTable.hpp" |
| #include "classfile/symbolTable.hpp" |
| #include "code/codeCacheExtensions.hpp" |
| #include "gc/shared/cardTableRS.hpp" |
| #include "gc/shared/genCollectedHeap.hpp" |
| #include "gc/shared/referenceProcessor.hpp" |
| #include "gc/shared/taskqueue.hpp" |
| #include "logging/log.hpp" |
| #include "logging/logTag.hpp" |
| #include "logging/logConfiguration.hpp" |
| #include "memory/allocation.inline.hpp" |
| #include "memory/universe.inline.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "prims/jvmtiExport.hpp" |
| #include "runtime/arguments.hpp" |
| #include "runtime/arguments_ext.hpp" |
| #include "runtime/commandLineFlagConstraintList.hpp" |
| #include "runtime/commandLineFlagRangeList.hpp" |
| #include "runtime/globals.hpp" |
| #include "runtime/globals_extension.hpp" |
| #include "runtime/java.hpp" |
| #include "runtime/os.hpp" |
| #include "runtime/vm_version.hpp" |
| #include "services/management.hpp" |
| #include "services/memTracker.hpp" |
| #include "utilities/defaultStream.hpp" |
| #include "utilities/macros.hpp" |
| #include "utilities/stringUtils.hpp" |
| #if INCLUDE_JVMCI |
| #include "jvmci/jvmciRuntime.hpp" |
| #endif |
| #if INCLUDE_ALL_GCS |
| #include "gc/cms/compactibleFreeListSpace.hpp" |
| #include "gc/g1/g1CollectedHeap.inline.hpp" |
| #include "gc/parallel/parallelScavengeHeap.hpp" |
| #endif // INCLUDE_ALL_GCS |
| |
| // Note: This is a special bug reporting site for the JVM |
| #define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp" |
| #define DEFAULT_JAVA_LAUNCHER "generic" |
| |
| #define UNSUPPORTED_GC_OPTION(gc) \ |
| do { \ |
| if (gc) { \ |
| if (FLAG_IS_CMDLINE(gc)) { \ |
| warning(#gc " is not supported in this VM. Using Serial GC."); \ |
| } \ |
| FLAG_SET_DEFAULT(gc, false); \ |
| } \ |
| } while(0) |
| |
| char* Arguments::_jvm_flags_file = NULL; |
| char** Arguments::_jvm_flags_array = NULL; |
| int Arguments::_num_jvm_flags = 0; |
| char** Arguments::_jvm_args_array = NULL; |
| int Arguments::_num_jvm_args = 0; |
| char* Arguments::_java_command = NULL; |
| SystemProperty* Arguments::_system_properties = NULL; |
| const char* Arguments::_gc_log_filename = NULL; |
| bool Arguments::_has_profile = false; |
| size_t Arguments::_conservative_max_heap_alignment = 0; |
| size_t Arguments::_min_heap_size = 0; |
| Arguments::Mode Arguments::_mode = _mixed; |
| bool Arguments::_java_compiler = false; |
| bool Arguments::_xdebug_mode = false; |
| const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG; |
| const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER; |
| int Arguments::_sun_java_launcher_pid = -1; |
| bool Arguments::_sun_java_launcher_is_altjvm = false; |
| int Arguments::_patch_dirs_count = 0; |
| char** Arguments::_patch_dirs = NULL; |
| int Arguments::_bootclassloader_append_index = -1; |
| |
| // These parameters are reset in method parse_vm_init_args() |
| bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; |
| bool Arguments::_UseOnStackReplacement = UseOnStackReplacement; |
| bool Arguments::_BackgroundCompilation = BackgroundCompilation; |
| bool Arguments::_ClipInlining = ClipInlining; |
| intx Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog; |
| intx Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold; |
| |
| char* Arguments::SharedArchivePath = NULL; |
| |
| AgentLibraryList Arguments::_libraryList; |
| AgentLibraryList Arguments::_agentList; |
| |
| abort_hook_t Arguments::_abort_hook = NULL; |
| exit_hook_t Arguments::_exit_hook = NULL; |
| vfprintf_hook_t Arguments::_vfprintf_hook = NULL; |
| |
| |
| SystemProperty *Arguments::_sun_boot_library_path = NULL; |
| SystemProperty *Arguments::_java_library_path = NULL; |
| SystemProperty *Arguments::_java_home = NULL; |
| SystemProperty *Arguments::_java_class_path = NULL; |
| SystemProperty *Arguments::_jdk_boot_class_path_append = NULL; |
| |
| PathString *Arguments::_system_boot_class_path = NULL; |
| |
| char* Arguments::_ext_dirs = NULL; |
| |
| // Check if head of 'option' matches 'name', and sets 'tail' to the remaining |
| // part of the option string. |
| static bool match_option(const JavaVMOption *option, const char* name, |
| const char** tail) { |
| size_t len = strlen(name); |
| if (strncmp(option->optionString, name, len) == 0) { |
| *tail = option->optionString + len; |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| // Check if 'option' matches 'name'. No "tail" is allowed. |
| static bool match_option(const JavaVMOption *option, const char* name) { |
| const char* tail = NULL; |
| bool result = match_option(option, name, &tail); |
| if (tail != NULL && *tail == '\0') { |
| return result; |
| } else { |
| return false; |
| } |
| } |
| |
| // Return true if any of the strings in null-terminated array 'names' matches. |
| // If tail_allowed is true, then the tail must begin with a colon; otherwise, |
| // the option must match exactly. |
| static bool match_option(const JavaVMOption* option, const char** names, const char** tail, |
| bool tail_allowed) { |
| for (/* empty */; *names != NULL; ++names) { |
| if (match_option(option, *names, tail)) { |
| if (**tail == '\0' || tail_allowed && **tail == ':') { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| static void logOption(const char* opt) { |
| if (PrintVMOptions) { |
| jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); |
| } |
| } |
| |
| // Process java launcher properties. |
| void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { |
| // See if sun.java.launcher, sun.java.launcher.is_altjvm or |
| // sun.java.launcher.pid is defined. |
| // Must do this before setting up other system properties, |
| // as some of them may depend on launcher type. |
| for (int index = 0; index < args->nOptions; index++) { |
| const JavaVMOption* option = args->options + index; |
| const char* tail; |
| |
| if (match_option(option, "-Dsun.java.launcher=", &tail)) { |
| process_java_launcher_argument(tail, option->extraInfo); |
| continue; |
| } |
| if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) { |
| if (strcmp(tail, "true") == 0) { |
| _sun_java_launcher_is_altjvm = true; |
| } |
| continue; |
| } |
| if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { |
| _sun_java_launcher_pid = atoi(tail); |
| continue; |
| } |
| } |
| } |
| |
| // Initialize system properties key and value. |
| void Arguments::init_system_properties() { |
| |
| // Set up _system_boot_class_path which is not a property but |
| // relies heavily on argument processing and the jdk.boot.class.path.append |
| // property. It is used to store the underlying system boot class path. |
| _system_boot_class_path = new PathString(NULL); |
| |
| PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", |
| "Java Virtual Machine Specification", false)); |
| PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); |
| PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); |
| PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); |
| PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false)); |
| |
| // Following are JVMTI agent writable properties. |
| // Properties values are set to NULL and they are |
| // os specific they are initialized in os::init_system_properties_values(). |
| _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); |
| _java_library_path = new SystemProperty("java.library.path", NULL, true); |
| _java_home = new SystemProperty("java.home", NULL, true); |
| _java_class_path = new SystemProperty("java.class.path", "", true); |
| // jdk.boot.class.path.append is a non-writeable, internal property. |
| // It can only be set by either: |
| // - -Xbootclasspath/a: |
| // - AddToBootstrapClassLoaderSearch during JVMTI OnLoad phase |
| _jdk_boot_class_path_append = new SystemProperty("jdk.boot.class.path.append", "", false, true); |
| |
| // Add to System Property list. |
| PropertyList_add(&_system_properties, _sun_boot_library_path); |
| PropertyList_add(&_system_properties, _java_library_path); |
| PropertyList_add(&_system_properties, _java_home); |
| PropertyList_add(&_system_properties, _java_class_path); |
| PropertyList_add(&_system_properties, _jdk_boot_class_path_append); |
| |
| // Set OS specific system properties values |
| os::init_system_properties_values(); |
| } |
| |
| // Update/Initialize System properties after JDK version number is known |
| void Arguments::init_version_specific_system_properties() { |
| enum { bufsz = 16 }; |
| char buffer[bufsz]; |
| const char* spec_vendor = "Oracle Corporation"; |
| uint32_t spec_version = JDK_Version::current().major_version(); |
| |
| jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version); |
| |
| PropertyList_add(&_system_properties, |
| new SystemProperty("java.vm.specification.vendor", spec_vendor, false)); |
| PropertyList_add(&_system_properties, |
| new SystemProperty("java.vm.specification.version", buffer, false)); |
| PropertyList_add(&_system_properties, |
| new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); |
| } |
| |
| /* |
| * -XX argument processing: |
| * |
| * -XX arguments are defined in several places, such as: |
| * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp. |
| * -XX arguments are parsed in parse_argument(). |
| * -XX argument bounds checking is done in check_vm_args_consistency(). |
| * |
| * Over time -XX arguments may change. There are mechanisms to handle common cases: |
| * |
| * ALIASED: An option that is simply another name for another option. This is often |
| * part of the process of deprecating a flag, but not all aliases need |
| * to be deprecated. |
| * |
| * 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 it's |
| * "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, commercial -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. |
| */ |
| |
| // Obsolete or deprecated -XX flag. |
| typedef struct { |
| const char* name; |
| JDK_Version deprecated_in; // When the deprecation warning started (or "undefined"). |
| JDK_Version obsolete_in; // When the obsolete warning started (or "undefined"). |
| JDK_Version expired_in; // When the option expires (or "undefined"). |
| } SpecialFlag; |
| |
| // 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: |
| { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() }, |
| { "UseParNewGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, |
| { "ConvertSleepToYield", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) }, |
| { "ConvertYieldToSleep", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) }, |
| |
| // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in: |
| { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() }, |
| { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() }, |
| { "CMSMarkStackSizeMax", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, |
| { "CMSMarkStackSize", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, |
| { "G1MarkStackSize", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, |
| { "ParallelMarkingThreads", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, |
| { "ParallelCMSThreads", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) }, |
| |
| // -------------- Obsolete Flags - sorted by expired_in -------------- |
| { "UseOldInlining", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "SafepointPollOffset", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "UseBoundThreads", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "DefaultThreadPriority", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "NoYieldsInMicrolock", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "BackEdgeThreshold", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "UseNewReflection", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "ReflectionWrapResolutionErrors",JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "VerifyReflectionBytecodes", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "AutoShutdownNMT", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "NmethodSweepFraction", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "NmethodSweepCheckInterval", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "CodeCacheMinimumFreeSpace", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| #ifndef ZERO |
| { "UseFastAccessorMethods", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "UseFastEmptyMethods", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| #endif // ZERO |
| { "UseCompilerSafepoints", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "AdaptiveSizePausePolicy", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "ParallelGCRetainPLAB", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "ThreadSafetyMargin", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "LazyBootClassLoader", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "StarvationMonitorInterval", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "PreInflateSpin", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "JNIDetachReleasesMonitors", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "UseAltSigs", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| { "SegmentedHeapDumpThreshold", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) }, |
| |
| #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS |
| { "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) }, |
| { "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() }, |
| { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() }, |
| #endif |
| |
| { NULL, 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[] = { |
| { "DefaultMaxRAMFraction", "MaxRAMFraction" }, |
| { "CMSMarkStackSizeMax", "MarkStackSizeMax" }, |
| { "CMSMarkStackSize", "MarkStackSize" }, |
| { "G1MarkStackSize", "MarkStackSize" }, |
| { "ParallelMarkingThreads", "ConcGCThreads" }, |
| { "ParallelCMSThreads", "ConcGCThreads" }, |
| { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" }, |
| { NULL, NULL} |
| }; |
| |
| static AliasedLoggingFlag const aliased_logging_flags[] = { |
| { "TraceClassLoading", LogLevel::Info, true, LogTag::_classload }, |
| { "TraceClassPaths", LogLevel::Info, true, LogTag::_classpath }, |
| { "TraceClassResolution", LogLevel::Info, true, LogTag::_classresolve }, |
| { "TraceClassUnloading", LogLevel::Info, true, LogTag::_classunload }, |
| { "TraceExceptions", LogLevel::Info, true, LogTag::_exceptions }, |
| { "TraceMonitorInflation", LogLevel::Debug, true, LogTag::_monitorinflation }, |
| { "TraceBiasedLocking", LogLevel::Info, true, LogTag::_biasedlocking }, |
| { NULL, LogLevel::Off, false, LogTag::__NO_TAG } |
| }; |
| |
| // 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 != NULL; 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 != NULL, "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.expired_in)) { |
| *version = flag.obsolete_in; |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) { |
| assert(version != NULL, "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 != NULL; 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 != NULL; i++) { |
| if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| static bool verify_special_jvm_flags() { |
| bool success = true; |
| for (size_t i = 0; special_jvm_flags[i].name != NULL; 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 (!version_less_than(JDK_Version::current(), flag.obsolete_in)) { |
| if (Flag::find_flag(flag.name) != NULL) { |
| warning("Global variable for obsolete special flag entry \"%s\" should be removed", 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 (!version_less_than(JDK_Version::current(), flag.expired_in)) { |
| if (Flag::find_flag(flag.name) != NULL) { |
| warning("Global variable for expired flag entry \"%s\" should be removed", flag.name); |
| success = false; |
| } |
| } |
| } |
| |
| } |
| return success; |
| } |
| #endif |
| |
| // Constructs the system boot class path from the following components, in order: |
| // |
| // prefix // from -Xpatch:... |
| // base // from os::get_system_properties() |
| // suffix // from -Xbootclasspath/a:... |
| // |
| // This could be AllStatic, but it isn't needed after argument processing is |
| // complete. After argument processing, the combined components are copied |
| // to Arguments::_system_boot_class_path via a call to Arguments::set_sysclasspath. |
| class ArgumentBootClassPath: public StackObj { |
| public: |
| ArgumentBootClassPath(const char* base); |
| ~ArgumentBootClassPath(); |
| |
| inline void set_base(const char* base); |
| inline void add_prefix(const char* prefix); |
| inline void add_suffix_to_prefix(const char* suffix); |
| inline void add_suffix(const char* suffix); |
| inline void reset_path(const char* base); |
| |
| inline const char* get_base() const { return _items[_bcp_base]; } |
| inline const char* get_prefix() const { return _items[_bcp_prefix]; } |
| inline const char* get_suffix() const { return _items[_bcp_suffix]; } |
| |
| // Combine all the components into a single c-heap-allocated string; caller |
| // must free the string if/when no longer needed. |
| char* combined_path(); |
| |
| private: |
| // Utility routines. |
| static char* add_to_path(const char* path, const char* str, bool prepend); |
| static char* add_jars_to_path(char* path, const char* directory); |
| |
| inline void reset_item_at(int index); |
| |
| // Array indices for the items that make up the sysclasspath. All except the |
| // base are allocated in the C heap and freed by this class. |
| enum { |
| _bcp_prefix, // was -Xpatch:... |
| _bcp_base, // the default system boot class path |
| _bcp_suffix, // from -Xbootclasspath/a:... |
| _bcp_nitems // the number of items, must be last. |
| }; |
| |
| const char* _items[_bcp_nitems]; |
| }; |
| |
| ArgumentBootClassPath::ArgumentBootClassPath(const char* base) { |
| memset(_items, 0, sizeof(_items)); |
| _items[_bcp_base] = base; |
| } |
| |
| ArgumentBootClassPath::~ArgumentBootClassPath() { |
| // Free everything except the base. |
| for (int i = 0; i < _bcp_nitems; ++i) { |
| if (i != _bcp_base) reset_item_at(i); |
| } |
| } |
| |
| inline void ArgumentBootClassPath::set_base(const char* base) { |
| _items[_bcp_base] = base; |
| } |
| |
| inline void ArgumentBootClassPath::add_prefix(const char* prefix) { |
| _items[_bcp_prefix] = add_to_path(_items[_bcp_prefix], prefix, true); |
| } |
| |
| inline void ArgumentBootClassPath::add_suffix_to_prefix(const char* suffix) { |
| _items[_bcp_prefix] = add_to_path(_items[_bcp_prefix], suffix, false); |
| } |
| |
| inline void ArgumentBootClassPath::add_suffix(const char* suffix) { |
| _items[_bcp_suffix] = add_to_path(_items[_bcp_suffix], suffix, false); |
| } |
| |
| inline void ArgumentBootClassPath::reset_item_at(int index) { |
| assert(index < _bcp_nitems && index != _bcp_base, "just checking"); |
| if (_items[index] != NULL) { |
| FREE_C_HEAP_ARRAY(char, _items[index]); |
| _items[index] = NULL; |
| } |
| } |
| |
| inline void ArgumentBootClassPath::reset_path(const char* base) { |
| // Clear the prefix and suffix. |
| reset_item_at(_bcp_prefix); |
| reset_item_at(_bcp_suffix); |
| set_base(base); |
| } |
| |
| //------------------------------------------------------------------------------ |
| |
| |
| // Combine the bootclasspath elements, some of which may be null, into a single |
| // c-heap-allocated string. |
| char* ArgumentBootClassPath::combined_path() { |
| assert(_items[_bcp_base] != NULL, "empty default sysclasspath"); |
| |
| size_t lengths[_bcp_nitems]; |
| size_t total_len = 0; |
| |
| const char separator = *os::path_separator(); |
| |
| // Get the lengths. |
| int i; |
| for (i = 0; i < _bcp_nitems; ++i) { |
| if (i == _bcp_suffix) { |
| // Record index of boot loader's append path. |
| Arguments::set_bootclassloader_append_index((int)total_len); |
| } |
| if (_items[i] != NULL) { |
| lengths[i] = strlen(_items[i]); |
| // Include space for the separator char (or a NULL for the last item). |
| total_len += lengths[i] + 1; |
| } |
| } |
| assert(total_len > 0, "empty sysclasspath not allowed"); |
| |
| // Copy the _items to a single string. |
| char* cp = NEW_C_HEAP_ARRAY(char, total_len, mtInternal); |
| char* cp_tmp = cp; |
| for (i = 0; i < _bcp_nitems; ++i) { |
| if (_items[i] != NULL) { |
| memcpy(cp_tmp, _items[i], lengths[i]); |
| cp_tmp += lengths[i]; |
| *cp_tmp++ = separator; |
| } |
| } |
| *--cp_tmp = '\0'; // Replace the extra separator. |
| return cp; |
| } |
| |
| // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. |
| char* |
| ArgumentBootClassPath::add_to_path(const char* path, const char* str, bool prepend) { |
| char *cp; |
| |
| assert(str != NULL, "just checking"); |
| if (path == NULL) { |
| size_t len = strlen(str) + 1; |
| cp = NEW_C_HEAP_ARRAY(char, len, mtInternal); |
| memcpy(cp, str, len); // copy the trailing null |
| } else { |
| const char separator = *os::path_separator(); |
| size_t old_len = strlen(path); |
| size_t str_len = strlen(str); |
| size_t len = old_len + str_len + 2; |
| |
| if (prepend) { |
| cp = NEW_C_HEAP_ARRAY(char, len, mtInternal); |
| char* cp_tmp = cp; |
| memcpy(cp_tmp, str, str_len); |
| cp_tmp += str_len; |
| *cp_tmp = separator; |
| memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null |
| FREE_C_HEAP_ARRAY(char, path); |
| } else { |
| cp = REALLOC_C_HEAP_ARRAY(char, path, len, mtInternal); |
| char* cp_tmp = cp + old_len; |
| *cp_tmp = separator; |
| memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null |
| } |
| } |
| return cp; |
| } |
| |
| // Scan the directory and append any jar or zip files found to path. |
| // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. |
| char* ArgumentBootClassPath::add_jars_to_path(char* path, const char* directory) { |
| DIR* dir = os::opendir(directory); |
| if (dir == NULL) return path; |
| |
| char dir_sep[2] = { '\0', '\0' }; |
| size_t directory_len = strlen(directory); |
| const char fileSep = *os::file_separator(); |
| if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep; |
| |
| /* Scan the directory for jars/zips, appending them to path. */ |
| struct dirent *entry; |
| char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal); |
| while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { |
| const char* name = entry->d_name; |
| const char* ext = name + strlen(name) - 4; |
| bool isJarOrZip = ext > name && |
| (os::file_name_strcmp(ext, ".jar") == 0 || |
| os::file_name_strcmp(ext, ".zip") == 0); |
| if (isJarOrZip) { |
| char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name), mtInternal); |
| sprintf(jarpath, "%s%s%s", directory, dir_sep, name); |
| path = add_to_path(path, jarpath, false); |
| FREE_C_HEAP_ARRAY(char, jarpath); |
| } |
| } |
| FREE_C_HEAP_ARRAY(char, dbuf); |
| os::closedir(dir); |
| return path; |
| } |
| |
| // Parses a memory size specification string. |
| static bool atomull(const char *s, julong* result) { |
| julong n = 0; |
| int args_read = 0; |
| bool is_hex = false; |
| // Skip leading 0[xX] for hexadecimal |
| if (*s =='0' && (*(s+1) == 'x' || *(s+1) == 'X')) { |
| s += 2; |
| is_hex = true; |
| args_read = sscanf(s, JULONG_FORMAT_X, &n); |
| } else { |
| args_read = sscanf(s, JULONG_FORMAT, &n); |
| } |
| if (args_read != 1) { |
| return false; |
| } |
| while (*s != '\0' && (isdigit(*s) || (is_hex && isxdigit(*s)))) { |
| s++; |
| } |
| // 4705540: illegal if more characters are found after the first non-digit |
| if (strlen(s) > 1) { |
| return false; |
| } |
| switch (*s) { |
| case 'T': case 't': |
| *result = n * G * K; |
| // Check for overflow. |
| if (*result/((julong)G * K) != n) return false; |
| return true; |
| case 'G': case 'g': |
| *result = n * G; |
| if (*result/G != n) return false; |
| return true; |
| case 'M': case 'm': |
| *result = n * M; |
| if (*result/M != n) return false; |
| return true; |
| case 'K': case 'k': |
| *result = n * K; |
| if (*result/K != n) return false; |
| return true; |
| case '\0': |
| *result = n; |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) { |
| if (size < min_size) return arg_too_small; |
| // Check that size will fit in a size_t (only relevant on 32-bit) |
| if (size > max_uintx) 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(const char* name, bool value, Flag::Flags origin) { |
| if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) { |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| static bool set_fp_numeric_flag(const char* name, char* value, Flag::Flags origin) { |
| char* end; |
| errno = 0; |
| double v = strtod(value, &end); |
| if ((errno != 0) || (*end != 0)) { |
| return false; |
| } |
| |
| if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) { |
| return true; |
| } |
| return false; |
| } |
| |
| static bool set_numeric_flag(const char* name, char* value, Flag::Flags origin) { |
| julong v; |
| int int_v; |
| intx intx_v; |
| bool is_neg = false; |
| Flag* result = Flag::find_flag(name, strlen(name)); |
| |
| if (result == NULL) { |
| return false; |
| } |
| |
| // Check the sign first since atomull() parses only unsigned values. |
| if (*value == '-') { |
| if (!result->is_intx() && !result->is_int()) { |
| return false; |
| } |
| value++; |
| is_neg = true; |
| } |
| if (!atomull(value, &v)) { |
| return false; |
| } |
| if (result->is_int()) { |
| int_v = (int) v; |
| if (is_neg) { |
| int_v = -int_v; |
| } |
| return CommandLineFlags::intAtPut(result, &int_v, origin) == Flag::SUCCESS; |
| } else if (result->is_uint()) { |
| uint uint_v = (uint) v; |
| return CommandLineFlags::uintAtPut(result, &uint_v, origin) == Flag::SUCCESS; |
| } else if (result->is_intx()) { |
| intx_v = (intx) v; |
| if (is_neg) { |
| intx_v = -intx_v; |
| } |
| return CommandLineFlags::intxAtPut(result, &intx_v, origin) == Flag::SUCCESS; |
| } else if (result->is_uintx()) { |
| uintx uintx_v = (uintx) v; |
| return CommandLineFlags::uintxAtPut(result, &uintx_v, origin) == Flag::SUCCESS; |
| } else if (result->is_uint64_t()) { |
| uint64_t uint64_t_v = (uint64_t) v; |
| return CommandLineFlags::uint64_tAtPut(result, &uint64_t_v, origin) == Flag::SUCCESS; |
| } else if (result->is_size_t()) { |
| size_t size_t_v = (size_t) v; |
| return CommandLineFlags::size_tAtPut(result, &size_t_v, origin) == Flag::SUCCESS; |
| } else { |
| return false; |
| } |
| } |
| |
| static bool set_string_flag(const char* name, const char* value, Flag::Flags origin) { |
| if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false; |
| // Contract: CommandLineFlags always returns a pointer that needs freeing. |
| FREE_C_HEAP_ARRAY(char, value); |
| return true; |
| } |
| |
| static bool append_to_string_flag(const char* name, const char* new_value, Flag::Flags origin) { |
| const char* old_value = ""; |
| if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false; |
| size_t old_len = old_value != NULL ? strlen(old_value) : 0; |
| size_t new_len = strlen(new_value); |
| const char* value; |
| char* free_this_too = NULL; |
| if (old_len == 0) { |
| value = new_value; |
| } else if (new_len == 0) { |
| value = old_value; |
| } else { |
| char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1, mtInternal); |
| // each new setting adds another LINE to the switch: |
| sprintf(buf, "%s\n%s", old_value, new_value); |
| value = buf; |
| free_this_too = buf; |
| } |
| (void) CommandLineFlags::ccstrAtPut(name, &value, origin); |
| // CommandLineFlags always returns a pointer that needs freeing. |
| FREE_C_HEAP_ARRAY(char, value); |
| if (free_this_too != NULL) { |
| // CommandLineFlags 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, bool warn) { |
| const char* real_name = real_flag_name(arg); |
| JDK_Version since = JDK_Version(); |
| switch (is_deprecated_flag(arg, &since)) { |
| case -1: |
| return NULL; // obsolete or expired, don't process normally |
| case 0: |
| return real_name; |
| case 1: { |
| if (warn) { |
| 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 NULL; |
| } |
| |
| AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name){ |
| for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) { |
| const AliasedLoggingFlag& alf = aliased_logging_flags[i]; |
| if (strcmp(alf.alias_name, name) == 0) { |
| return alf; |
| } |
| } |
| AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LogTag::__NO_TAG}; |
| return a; |
| } |
| |
| bool Arguments::parse_argument(const char* arg, Flag::Flags origin) { |
| |
| // range of acceptable characters spelled out for portability reasons |
| #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" |
| #define BUFLEN 255 |
| char name[BUFLEN+1]; |
| char dummy; |
| const char* real_name; |
| bool warn_if_deprecated = true; |
| AliasedLoggingFlag alf; |
| |
| if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { |
| alf = catch_logging_aliases(name); |
| if (alf.alias_name != NULL){ |
| LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag, LogTag::__NO_TAG); |
| return true; |
| } |
| real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); |
| if (real_name == NULL) { |
| return false; |
| } |
| return set_bool_flag(real_name, false, origin); |
| } |
| if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { |
| alf = catch_logging_aliases(name); |
| if (alf.alias_name != NULL){ |
| LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag, LogTag::__NO_TAG); |
| return true; |
| } |
| real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); |
| if (real_name == NULL) { |
| return false; |
| } |
| return set_bool_flag(real_name, true, origin); |
| } |
| |
| char punct; |
| if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { |
| const char* value = strchr(arg, '=') + 1; |
| Flag* flag; |
| |
| // this scanf pattern matches both strings (handled here) and numbers (handled later)) |
| real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); |
| if (real_name == NULL) { |
| return false; |
| } |
| flag = Flag::find_flag(real_name); |
| if (flag != NULL && flag->is_ccstr()) { |
| if (flag->ccstr_accumulates()) { |
| return append_to_string_flag(real_name, value, origin); |
| } else { |
| if (value[0] == '\0') { |
| value = NULL; |
| } |
| return set_string_flag(real_name, value, origin); |
| } |
| } else { |
| warn_if_deprecated = false; // if arg is deprecated, we've already done warning... |
| } |
| } |
| |
| if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { |
| const char* value = strchr(arg, '=') + 1; |
| // -XX:Foo:=xxx will reset the string flag to the given value. |
| if (value[0] == '\0') { |
| value = NULL; |
| } |
| real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); |
| if (real_name == NULL) { |
| return false; |
| } |
| return set_string_flag(real_name, value, origin); |
| } |
| |
| #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]" |
| #define SIGNED_NUMBER_RANGE "[-0123456789]" |
| #define NUMBER_RANGE "[0123456789eE+-]" |
| char value[BUFLEN + 1]; |
| char value2[BUFLEN + 1]; |
| if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { |
| // Looks like a floating-point number -- try again with more lenient format string |
| if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { |
| real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); |
| if (real_name == NULL) { |
| return false; |
| } |
| return set_fp_numeric_flag(real_name, value, origin); |
| } |
| } |
| |
| #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]" |
| if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { |
| real_name = handle_aliases_and_deprecation(name, warn_if_deprecated); |
| if (real_name == NULL) { |
| return false; |
| } |
| return set_numeric_flag(real_name, value, origin); |
| } |
| |
| return false; |
| } |
| |
| void Arguments::add_string(char*** bldarray, int* count, const char* arg) { |
| assert(bldarray != NULL, "illegal argument"); |
| |
| if (arg == NULL) { |
| return; |
| } |
| |
| int new_count = *count + 1; |
| |
| // expand the array and add arg to the last element |
| if (*bldarray == NULL) { |
| *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtInternal); |
| } else { |
| *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtInternal); |
| } |
| (*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 == NULL || count == 0) { |
| return NULL; |
| } |
| size_t length = strlen(args[0]) + 1; // add 1 for the null terminator |
| for (int i = 1; i < count; i++) { |
| length += strlen(args[i]) + 1; // add 1 for a space |
| } |
| char* s = NEW_RESOURCE_ARRAY(char, length); |
| strcpy(s, args[0]); |
| for (int j = 1; j < count; j++) { |
| strcat(s, " "); |
| strcat(s, args[j]); |
| } |
| 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 != NULL) { |
| char* path = _java_class_path->value(); |
| st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path ); |
| } |
| 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() != NULL) { |
| 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, |
| Flag::Flags 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 == NULL) { |
| 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]; |
| strncpy(stripped_argname, argname, arg_len); |
| stripped_argname[arg_len] = '\0'; // strncpy may not null terminate. |
| |
| 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. |
| Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true); |
| if (found_flag != NULL) { |
| char locked_message_buf[BUFLEN]; |
| Flag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN); |
| if (strlen(locked_message_buf) == 0) { |
| 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 { |
| #ifdef PRODUCT |
| bool mismatched = ((msg_type == Flag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) || |
| (msg_type == Flag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD)); |
| if (ignore_unrecognized && mismatched) { |
| return true; |
| } |
| #endif |
| jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf); |
| } |
| } else { |
| if (ignore_unrecognized) { |
| return true; |
| } |
| jio_fprintf(defaultStream::error_stream(), |
| "Unrecognized VM option '%s'\n", argname); |
| Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true); |
| if (fuzzy_matched != NULL) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Did you mean '%s%s%s'? ", |
| (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 = fopen(file_name, "rb"); |
| if (stream == NULL) { |
| 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; |
| char 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(c)) { |
| in_white_space = false; |
| token[pos++] = c; |
| } |
| } |
| } else { |
| if (c == '\n' || (!in_quote && isspace(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, Flag::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++] = c; |
| } |
| } |
| c = getc(stream); |
| } |
| if (pos > 0) { |
| token[pos] = '\0'; |
| result &= process_argument(token, ignore_unrecognized, Flag::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) { |
| const char* eq = strchr(prop, '='); |
| const char* key; |
| const char* value = ""; |
| |
| if (eq == NULL) { |
| // 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, mtInternal); |
| |
| strncpy(tmp_key, prop, key_len); |
| tmp_key[key_len] = '\0'; |
| key = tmp_key; |
| |
| value = &prop[key_len + 1]; |
| } |
| |
| if (strcmp(key, "java.compiler") == 0) { |
| process_java_compiler_argument(value); |
| // Record value in Arguments, but let it get passed to Java. |
| } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 || |
| strcmp(key, "sun.java.launcher.pid") == 0) { |
| // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are |
| // private and are processed in process_sun_java_launcher_properties(); |
| // the sun.java.launcher property is passed on to the java application |
| } else if (strcmp(key, "sun.boot.library.path") == 0) { |
| PropertyList_unique_add(&_system_properties, key, value, true); |
| } else { |
| if (strcmp(key, "sun.java.command") == 0) { |
| char *old_java_command = _java_command; |
| _java_command = os::strdup_check_oom(value, mtInternal); |
| if (old_java_command != NULL) { |
| os::free(old_java_command); |
| } |
| } else if (strcmp(key, "java.vendor.url.bug") == 0) { |
| 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, mtInternal); |
| if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) { |
| assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL"); |
| 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); |
| } |
| |
| if (key != prop) { |
| // SystemProperty copy passed value, thus free previously allocated |
| // memory |
| FreeHeap((void *)key); |
| } |
| |
| return true; |
| } |
| |
| // sets or adds a module name to the jdk.launcher.addmods property |
| bool Arguments::append_to_addmods_property(const char* module_name) { |
| const char* key = "jdk.launcher.addmods"; |
| const char* old_value = Arguments::get_property(key); |
| size_t buf_len = strlen(key) + strlen(module_name) + 2; |
| if (old_value != NULL) { |
| buf_len += strlen(old_value) + 1; |
| } |
| char* new_value = AllocateHeap(buf_len, mtInternal); |
| if (new_value == NULL) { |
| return false; |
| } |
| if (old_value == NULL) { |
| jio_snprintf(new_value, buf_len, "%s=%s", key, module_name); |
| } else { |
| jio_snprintf(new_value, buf_len, "%s=%s,%s", key, old_value, module_name); |
| } |
| bool added = add_property(new_value); |
| FreeHeap(new_value); |
| return added; |
| } |
| |
| #if INCLUDE_CDS |
| void Arguments::check_unsupported_dumping_properties() { |
| assert(DumpSharedSpaces, "this function is only used with -Xshare:dump"); |
| const char* unsupported_properties[5] = { "jdk.module.main", |
| "jdk.module.path", |
| "jdk.upgrade.module.path", |
| "jdk.launcher.addmods", |
| "jdk.launcher.limitmods" }; |
| const char* unsupported_options[5] = { "-m", |
| "-modulepath", |
| "-upgrademodulepath", |
| "-addmods", |
| "-limitmods" }; |
| SystemProperty* sp = system_properties(); |
| while (sp != NULL) { |
| for (int i = 0; i < 5; i++) { |
| if (strcmp(sp->key(), unsupported_properties[i]) == 0) { |
| vm_exit_during_initialization( |
| "Cannot use the following option when dumping the shared archive", unsupported_options[i]); |
| } |
| } |
| sp = sp->next(); |
| } |
| } |
| #endif |
| |
| //=========================================================================================================== |
| // 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. |
| set_java_compiler(false); |
| _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(), false); |
| |
| 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; |
| if (TieredCompilation) { |
| if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) { |
| Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog; |
| } |
| if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) { |
| Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold; |
| } |
| } |
| |
| // 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; |
| // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more. |
| // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and |
| // compile a level 4 (C2) and then continue executing it. |
| if (TieredCompilation) { |
| Tier3InvokeNotifyFreqLog = 0; |
| Tier4InvocationThreshold = 0; |
| } |
| break; |
| } |
| } |
| |
| #if defined(COMPILER2) || INCLUDE_JVMCI || defined(_LP64) || !INCLUDE_CDS |
| // Conflict: required to use shared spaces (-Xshare:on), but |
| // incompatible command line options were chosen. |
| |
| static void no_shared_spaces(const char* message) { |
| if (RequireSharedSpaces) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Class data sharing is inconsistent with other specified options.\n"); |
| vm_exit_during_initialization("Unable to use shared archive.", message); |
| } else { |
| FLAG_SET_DEFAULT(UseSharedSpaces, false); |
| } |
| } |
| #endif |
| |
| // Returns threshold scaled with the value of scale. |
| // If scale < 0.0, threshold is returned without scaling. |
| intx Arguments::scaled_compile_threshold(intx threshold, double scale) { |
| if (scale == 1.0 || scale < 0.0) { |
| return threshold; |
| } else { |
| return (intx)(threshold * scale); |
| } |
| } |
| |
| // Returns freq_log scaled with the value of scale. |
| // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1]. |
| // If scale < 0.0, freq_log is returned without scaling. |
| intx Arguments::scaled_freq_log(intx freq_log, double scale) { |
| // Check if scaling is necessary or if negative value was specified. |
| if (scale == 1.0 || scale < 0.0) { |
| return freq_log; |
| } |
| // Check values to avoid calculating log2 of 0. |
| if (scale == 0.0 || freq_log == 0) { |
| return 0; |
| } |
| // Determine the maximum notification frequency value currently supported. |
| // The largest mask value that the interpreter/C1 can handle is |
| // of length InvocationCounter::number_of_count_bits. Mask values are always |
| // one bit shorter then the value of the notification frequency. Set |
| // max_freq_bits accordingly. |
| intx max_freq_bits = InvocationCounter::number_of_count_bits + 1; |
| intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale); |
| if (scaled_freq == 0) { |
| // Return 0 right away to avoid calculating log2 of 0. |
| return 0; |
| } else if (scaled_freq > nth_bit(max_freq_bits)) { |
| return max_freq_bits; |
| } else { |
| return log2_intptr(scaled_freq); |
| } |
| } |
| |
| void Arguments::set_tiered_flags() { |
| // With tiered, set default policy to AdvancedThresholdPolicy, which is 3. |
| if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) { |
| FLAG_SET_DEFAULT(CompilationPolicyChoice, 3); |
| } |
| if (CompilationPolicyChoice < 2) { |
| vm_exit_during_initialization( |
| "Incompatible compilation policy selected", NULL); |
| } |
| // Increase the code cache size - tiered compiles a lot more. |
| if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { |
| FLAG_SET_ERGO(uintx, ReservedCodeCacheSize, |
| MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5)); |
| } |
| // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M |
| if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) { |
| FLAG_SET_ERGO(bool, SegmentedCodeCache, true); |
| } |
| if (!UseInterpreter) { // -Xcomp |
| Tier3InvokeNotifyFreqLog = 0; |
| Tier4InvocationThreshold = 0; |
| } |
| |
| if (CompileThresholdScaling < 0) { |
| vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL); |
| } |
| |
| // Scale tiered compilation thresholds. |
| // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged. |
| if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) { |
| FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog)); |
| FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog)); |
| |
| FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold)); |
| FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold)); |
| FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold)); |
| FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold)); |
| |
| // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here |
| // once these thresholds become supported. |
| |
| FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog)); |
| FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog)); |
| |
| FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog)); |
| FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog)); |
| |
| FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog)); |
| |
| FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold)); |
| FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold)); |
| FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold)); |
| FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold)); |
| } |
| } |
| |
| #if INCLUDE_ALL_GCS |
| static void disable_adaptive_size_policy(const char* collector_name) { |
| if (UseAdaptiveSizePolicy) { |
| if (FLAG_IS_CMDLINE(UseAdaptiveSizePolicy)) { |
| warning("Disabling UseAdaptiveSizePolicy; it is incompatible with %s.", |
| collector_name); |
| } |
| FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); |
| } |
| } |
| |
| void Arguments::set_parnew_gc_flags() { |
| assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC, |
| "control point invariant"); |
| assert(UseConcMarkSweepGC, "CMS is expected to be on here"); |
| assert(UseParNewGC, "ParNew should always be used with CMS"); |
| |
| if (FLAG_IS_DEFAULT(ParallelGCThreads)) { |
| FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads()); |
| assert(ParallelGCThreads > 0, "We should always have at least one thread by default"); |
| } else if (ParallelGCThreads == 0) { |
| jio_fprintf(defaultStream::error_stream(), |
| "The ParNew GC can not be combined with -XX:ParallelGCThreads=0\n"); |
| vm_exit(1); |
| } |
| |
| // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively, |
| // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration |
| // we set them to 1024 and 1024. |
| // See CR 6362902. |
| if (FLAG_IS_DEFAULT(YoungPLABSize)) { |
| FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); |
| } |
| if (FLAG_IS_DEFAULT(OldPLABSize)) { |
| FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); |
| } |
| |
| // When using compressed oops, we use local overflow stacks, |
| // rather than using a global overflow list chained through |
| // the klass word of the object's pre-image. |
| if (UseCompressedOops && !ParGCUseLocalOverflow) { |
| if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) { |
| warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references"); |
| } |
| FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true); |
| } |
| assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error"); |
| } |
| |
| // Adjust some sizes to suit CMS and/or ParNew needs; these work well on |
| // sparc/solaris for certain applications, but would gain from |
| // further optimization and tuning efforts, and would almost |
| // certainly gain from analysis of platform and environment. |
| void Arguments::set_cms_and_parnew_gc_flags() { |
| assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error"); |
| assert(UseConcMarkSweepGC, "CMS is expected to be on here"); |
| assert(UseParNewGC, "ParNew should always be used with CMS"); |
| |
| // Turn off AdaptiveSizePolicy by default for cms until it is complete. |
| disable_adaptive_size_policy("UseConcMarkSweepGC"); |
| |
| set_parnew_gc_flags(); |
| |
| size_t max_heap = align_size_down(MaxHeapSize, |
| CardTableRS::ct_max_alignment_constraint()); |
| |
| // Now make adjustments for CMS |
| intx tenuring_default = (intx)6; |
| size_t young_gen_per_worker = CMSYoungGenPerWorker; |
| |
| // Preferred young gen size for "short" pauses: |
| // upper bound depends on # of threads and NewRatio. |
| const size_t preferred_max_new_size_unaligned = |
| MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * ParallelGCThreads)); |
| size_t preferred_max_new_size = |
| align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); |
| |
| // Unless explicitly requested otherwise, size young gen |
| // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads |
| |
| // If either MaxNewSize or NewRatio is set on the command line, |
| // assume the user is trying to set the size of the young gen. |
| if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) { |
| |
| // Set MaxNewSize to our calculated preferred_max_new_size unless |
| // NewSize was set on the command line and it is larger than |
| // preferred_max_new_size. |
| if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line |
| FLAG_SET_ERGO(size_t, MaxNewSize, MAX2(NewSize, preferred_max_new_size)); |
| } else { |
| FLAG_SET_ERGO(size_t, MaxNewSize, preferred_max_new_size); |
| } |
| log_trace(gc, heap)("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize); |
| |
| // Code along this path potentially sets NewSize and OldSize |
| log_trace(gc, heap)("CMS set min_heap_size: " SIZE_FORMAT " initial_heap_size: " SIZE_FORMAT " max_heap: " SIZE_FORMAT, |
| min_heap_size(), InitialHeapSize, max_heap); |
| size_t min_new = preferred_max_new_size; |
| if (FLAG_IS_CMDLINE(NewSize)) { |
| min_new = NewSize; |
| } |
| if (max_heap > min_new && min_heap_size() > min_new) { |
| // Unless explicitly requested otherwise, make young gen |
| // at least min_new, and at most preferred_max_new_size. |
| if (FLAG_IS_DEFAULT(NewSize)) { |
| FLAG_SET_ERGO(size_t, NewSize, MAX2(NewSize, min_new)); |
| FLAG_SET_ERGO(size_t, NewSize, MIN2(preferred_max_new_size, NewSize)); |
| log_trace(gc, heap)("CMS ergo set NewSize: " SIZE_FORMAT, NewSize); |
| } |
| // Unless explicitly requested otherwise, size old gen |
| // so it's NewRatio x of NewSize. |
| if (FLAG_IS_DEFAULT(OldSize)) { |
| if (max_heap > NewSize) { |
| FLAG_SET_ERGO(size_t, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize)); |
| log_trace(gc, heap)("CMS ergo set OldSize: " SIZE_FORMAT, OldSize); |
| } |
| } |
| } |
| } |
| // Unless explicitly requested otherwise, definitely |
| // promote all objects surviving "tenuring_default" scavenges. |
| if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && |
| FLAG_IS_DEFAULT(SurvivorRatio)) { |
| FLAG_SET_ERGO(uintx, MaxTenuringThreshold, tenuring_default); |
| } |
| // If we decided above (or user explicitly requested) |
| // `promote all' (via MaxTenuringThreshold := 0), |
| // prefer minuscule survivor spaces so as not to waste |
| // space for (non-existent) survivors |
| if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { |
| FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio)); |
| } |
| |
| // OldPLABSize is interpreted in CMS as not the size of the PLAB in words, |
| // but rather the number of free blocks of a given size that are used when |
| // replenishing the local per-worker free list caches. |
| if (FLAG_IS_DEFAULT(OldPLABSize)) { |
| if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) { |
| // OldPLAB sizing manually turned off: Use a larger default setting, |
| // unless it was manually specified. This is because a too-low value |
| // will slow down scavenges. |
| FLAG_SET_ERGO(size_t, OldPLABSize, CompactibleFreeListSpaceLAB::_default_static_old_plab_size); // default value before 6631166 |
| } else { |
| FLAG_SET_DEFAULT(OldPLABSize, CompactibleFreeListSpaceLAB::_default_dynamic_old_plab_size); // old CMSParPromoteBlocksToClaim default |
| } |
| } |
| |
| // If either of the static initialization defaults have changed, note this |
| // modification. |
| if (!FLAG_IS_DEFAULT(OldPLABSize) || !FLAG_IS_DEFAULT(OldPLABWeight)) { |
| CompactibleFreeListSpaceLAB::modify_initialization(OldPLABSize, OldPLABWeight); |
| } |
| |
| if (!ClassUnloading) { |
| FLAG_SET_CMDLINE(bool, CMSClassUnloadingEnabled, false); |
| FLAG_SET_CMDLINE(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false); |
| } |
| |
| log_trace(gc)("MarkStackSize: %uk MarkStackSizeMax: %uk", (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K)); |
| log_trace(gc)("ConcGCThreads: %u", ConcGCThreads); |
| } |
| #endif // INCLUDE_ALL_GCS |
| |
| 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; |
| |
| if (SurvivorAlignmentInBytes == 0) { |
| SurvivorAlignmentInBytes = ObjectAlignmentInBytes; |
| } |
| |
| #if INCLUDE_ALL_GCS |
| // Set CMS global values |
| CompactibleFreeListSpace::set_cms_values(); |
| #endif // INCLUDE_ALL_GCS |
| } |
| |
| 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_size_up_(os::vm_page_size(), |
| _conservative_max_heap_alignment); |
| |
| LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page); |
| NOT_LP64(ShouldNotReachHere(); return 0); |
| } |
| |
| bool Arguments::should_auto_select_low_pause_collector() { |
| if (UseAutoGCSelectPolicy && |
| !FLAG_IS_DEFAULT(MaxGCPauseMillis) && |
| (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { |
| log_trace(gc)("Automatic selection of the low pause collector based on pause goal of %d (ms)", (int) MaxGCPauseMillis); |
| return true; |
| } |
| return false; |
| } |
| |
| void Arguments::set_use_compressed_oops() { |
| #ifndef ZERO |
| #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 is InitialHeapSize. |
| size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize); |
| |
| if (max_heap_size <= max_heap_for_compressed_oops()) { |
| #if !defined(COMPILER1) || defined(TIERED) |
| if (FLAG_IS_DEFAULT(UseCompressedOops)) { |
| FLAG_SET_ERGO(bool, UseCompressedOops, true); |
| } |
| #endif |
| } else { |
| if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { |
| warning("Max heap size too large for Compressed Oops"); |
| FLAG_SET_DEFAULT(UseCompressedOops, false); |
| FLAG_SET_DEFAULT(UseCompressedClassPointers, false); |
| } |
| } |
| #endif // _LP64 |
| #endif // ZERO |
| } |
| |
| |
| // NOTE: set_use_compressed_klass_ptrs() must be called after calling |
| // set_use_compressed_oops(). |
| void Arguments::set_use_compressed_klass_ptrs() { |
| #ifndef ZERO |
| #ifdef _LP64 |
| // UseCompressedOops must be on for UseCompressedClassPointers to be on. |
| if (!UseCompressedOops) { |
| if (UseCompressedClassPointers) { |
| warning("UseCompressedClassPointers requires UseCompressedOops"); |
| } |
| FLAG_SET_DEFAULT(UseCompressedClassPointers, false); |
| } else { |
| // Turn on UseCompressedClassPointers too |
| if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) { |
| FLAG_SET_ERGO(bool, UseCompressedClassPointers, true); |
| } |
| // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs. |
| if (UseCompressedClassPointers) { |
| if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) { |
| warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers"); |
| FLAG_SET_DEFAULT(UseCompressedClassPointers, false); |
| } |
| } |
| } |
| #endif // _LP64 |
| #endif // !ZERO |
| } |
| |
| 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, the collector policy and the maximum page size we may run the VM |
| // with. |
| size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment(); |
| #if INCLUDE_ALL_GCS |
| if (UseParallelGC) { |
| heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment(); |
| } else if (UseG1GC) { |
| heap_alignment = G1CollectedHeap::conservative_max_heap_alignment(); |
| } |
| #endif // INCLUDE_ALL_GCS |
| _conservative_max_heap_alignment = MAX4(heap_alignment, |
| (size_t)os::vm_allocation_granularity(), |
| os::max_page_size(), |
| CollectorPolicy::compute_heap_alignment()); |
| } |
| |
| void Arguments::select_gc_ergonomically() { |
| if (os::is_server_class_machine()) { |
| if (should_auto_select_low_pause_collector()) { |
| FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); |
| } else { |
| #if defined(JAVASE_EMBEDDED) |
| FLAG_SET_ERGO(bool, UseParallelGC, true); |
| #else |
| FLAG_SET_ERGO(bool, UseG1GC, true); |
| #endif |
| } |
| } else { |
| FLAG_SET_ERGO(bool, UseSerialGC, true); |
| } |
| } |
| |
| void Arguments::select_gc() { |
| if (!gc_selected()) { |
| select_gc_ergonomically(); |
| guarantee(gc_selected(), "No GC selected"); |
| } |
| } |
| |
| void Arguments::set_ergonomics_flags() { |
| select_gc(); |
| |
| #if defined(COMPILER2) || INCLUDE_JVMCI |
| // Shared spaces work fine with other GCs but causes bytecode rewriting |
| // to be disabled, which hurts interpreter performance and decreases |
| // server performance. When -server is specified, keep the default off |
| // unless it is asked for. Future work: either add bytecode rewriting |
| // at link time, or rewrite bytecodes in non-shared methods. |
| if (!DumpSharedSpaces && !RequireSharedSpaces && |
| (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) { |
| no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on."); |
| } |
| #endif |
| |
| set_conservative_max_heap_alignment(); |
| |
| #ifndef ZERO |
| #ifdef _LP64 |
| set_use_compressed_oops(); |
| |
| // set_use_compressed_klass_ptrs() must be called after calling |
| // set_use_compressed_oops(). |
| set_use_compressed_klass_ptrs(); |
| |
| // Also checks that certain machines are slower with compressed oops |
| // in vm_version initialization code. |
| #endif // _LP64 |
| #endif // !ZERO |
| |
| CodeCacheExtensions::set_ergonomics_flags(); |
| } |
| |
| void Arguments::set_parallel_gc_flags() { |
| assert(UseParallelGC || UseParallelOldGC, "Error"); |
| // Enable ParallelOld unless it was explicitly disabled (cmd line or rc file). |
| if (FLAG_IS_DEFAULT(UseParallelOldGC)) { |
| FLAG_SET_DEFAULT(UseParallelOldGC, true); |
| } |
| FLAG_SET_DEFAULT(UseParallelGC, true); |
| |
| // If no heap maximum was requested explicitly, use some reasonable fraction |
| // of the physical memory, up to a maximum of 1GB. |
| FLAG_SET_DEFAULT(ParallelGCThreads, |
| Abstract_VM_Version::parallel_worker_threads()); |
| if (ParallelGCThreads == 0) { |
| jio_fprintf(defaultStream::error_stream(), |
| "The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n"); |
| vm_exit(1); |
| } |
| |
| if (UseAdaptiveSizePolicy) { |
| // We don't want to limit adaptive heap sizing's freedom to adjust the heap |
| // unless the user actually sets these flags. |
| if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) { |
| FLAG_SET_DEFAULT(MinHeapFreeRatio, 0); |
| } |
| if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) { |
| FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100); |
| } |
| } |
| |
| // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the |
| // SurvivorRatio has been set, reset their default values to SurvivorRatio + |
| // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. |
| // See CR 6362902 for details. |
| if (!FLAG_IS_DEFAULT(SurvivorRatio)) { |
| if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { |
| FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); |
| } |
| if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { |
| FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); |
| } |
| } |
| |
| if (UseParallelOldGC) { |
| // Par compact uses lower default values since they are treated as |
| // minimums. These are different defaults because of the different |
| // interpretation and are not ergonomically set. |
| if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { |
| FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1); |
| } |
| } |
| } |
| |
| void Arguments::set_g1_gc_flags() { |
| assert(UseG1GC, "Error"); |
| #if defined(COMPILER1) || INCLUDE_JVMCI |
| FastTLABRefill = false; |
| #endif |
| FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads()); |
| if (ParallelGCThreads == 0) { |
| assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0."); |
| vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL); |
| } |
| |
| #if INCLUDE_ALL_GCS |
| if (G1ConcRefinementThreads == 0) { |
| FLAG_SET_DEFAULT(G1ConcRefinementThreads, ParallelGCThreads); |
| } |
| #endif |
| |
| // MarkStackSize will be set (if it hasn't been set by the user) |
| // when concurrent marking is initialized. |
| // Its value will be based upon the number of parallel marking threads. |
| // But we do set the maximum mark stack size here. |
| if (FLAG_IS_DEFAULT(MarkStackSizeMax)) { |
| FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE); |
| } |
| |
| if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) { |
| // In G1, we want the default GC overhead goal to be higher than |
| // it is for PS, or the heap might be expanded too aggressively. |
| // We set it here to ~8%. |
| FLAG_SET_DEFAULT(GCTimeRatio, 12); |
| } |
| |
| log_trace(gc)("MarkStackSize: %uk MarkStackSizeMax: %uk", (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K)); |
| log_trace(gc)("ConcGCThreads: %u", ConcGCThreads); |
| } |
| |
| #if !INCLUDE_ALL_GCS |
| #ifdef ASSERT |
| static bool verify_serial_gc_flags() { |
| return (UseSerialGC && |
| !(UseParNewGC || (UseConcMarkSweepGC) || UseG1GC || |
| UseParallelGC || UseParallelOldGC)); |
| } |
| #endif // ASSERT |
| #endif // INCLUDE_ALL_GCS |
| |
| void Arguments::set_gc_specific_flags() { |
| #if INCLUDE_ALL_GCS |
| // Set per-collector flags |
| if (UseParallelGC || UseParallelOldGC) { |
| set_parallel_gc_flags(); |
| } else if (UseConcMarkSweepGC) { |
| set_cms_and_parnew_gc_flags(); |
| } else if (UseG1GC) { |
| set_g1_gc_flags(); |
| } |
| if (AssumeMP && !UseSerialGC) { |
| if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) { |
| warning("If the number of processors is expected to increase from one, then" |
| " you should configure the number of parallel GC threads appropriately" |
| " using -XX:ParallelGCThreads=N"); |
| } |
| } |
| if (MinHeapFreeRatio == 100) { |
| // Keeping the heap 100% free is hard ;-) so limit it to 99%. |
| FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99); |
| } |
| #else // INCLUDE_ALL_GCS |
| assert(verify_serial_gc_flags(), "SerialGC unset"); |
| #endif // INCLUDE_ALL_GCS |
| } |
| |
| julong Arguments::limit_by_allocatable_memory(julong limit) { |
| julong max_allocatable; |
| julong result = limit; |
| if (os::has_allocatable_memory_limit(&max_allocatable)) { |
| result = MIN2(result, max_allocatable / MaxVirtMemFraction); |
| } |
| return result; |
| } |
| |
| // Use static initialization to get the default before parsing |
| static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress; |
| |
| void Arguments::set_heap_size() { |
| const julong 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 = phys_mem / MaxRAMFraction; |
| |
| if (phys_mem <= MaxHeapSize * MinRAMFraction) { |
| // Small physical memory, so use a minimum fraction of it for the heap |
| reasonable_max = phys_mem / MinRAMFraction; |
| } 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); |
| } |
| if (UseCompressedOops) { |
| // Limit the heap size to the maximum possible when using compressed oops |
| julong max_coop_heap = (julong)max_heap_for_compressed_oops(); |
| |
| // HeapBaseMinAddress can be greater than default but not less than. |
| if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) { |
| if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) { |
| // matches compressed oops printing flags |
| if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) { |
| jio_fprintf(defaultStream::error_stream(), |
| "HeapBaseMinAddress must be at least " SIZE_FORMAT |
| " (" SIZE_FORMAT "G) which is greater than value given " |
| SIZE_FORMAT "\n", |
| DefaultHeapBaseMinAddress, |
| DefaultHeapBaseMinAddress/G, |
| HeapBaseMinAddress); |
| } |
| FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress); |
| } |
| } |
| |
| 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; |
| } |
| reasonable_max = MIN2(reasonable_max, max_coop_heap); |
| } |
| reasonable_max = limit_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_by_allocatable_memory because that |
| // method might reduce the allocation size. |
| reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); |
| } |
| |
| log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max); |
| FLAG_SET_ERGO(size_t, 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 || min_heap_size() == 0) { |
| julong reasonable_minimum = (julong)(OldSize + NewSize); |
| |
| reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); |
| |
| reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum); |
| |
| if (InitialHeapSize == 0) { |
| julong reasonable_initial = phys_mem / InitialRAMFraction; |
| |
| reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size()); |
| reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); |
| |
| reasonable_initial = limit_by_allocatable_memory(reasonable_initial); |
| |
| log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial); |
| FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial); |
| } |
| // If the minimum heap size has not been set (via -Xms), |
| // synchronize with InitialHeapSize to avoid errors with the default value. |
| if (min_heap_size() == 0) { |
| set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize)); |
| log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size()); |
| } |
| } |
| } |
| |
| // 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_by_allocatable_memory(initHeapSize); |
| |
| if (FLAG_IS_DEFAULT(MaxHeapSize)) { |
| if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| // Currently the minimum size and the initial heap sizes are the same. |
| set_min_heap_size(initHeapSize); |
| } |
| if (FLAG_IS_DEFAULT(NewSize)) { |
| // Make the young generation 3/8ths of the total heap. |
| if (FLAG_SET_CMDLINE(size_t, NewSize, |
| ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::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(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != Flag::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(size_t, YoungPLABSize, 256 * K) != Flag::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(size_t, OldPLABSize, 8 * K) != Flag::SUCCESS) { // Note: this is in words |
| return JNI_EINVAL; |
| } |
| |
| // Enable parallel GC and adaptive generation sizing |
| if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| FLAG_SET_DEFAULT(ParallelGCThreads, |
| Abstract_VM_Version::parallel_worker_threads()); |
| |
| // Encourage steady state memory management |
| if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| |
| // This appears to improve mutator locality |
| if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| |
| // Get around early Solaris scheduling bug |
| // (affinity vs other jobs on system) |
| // but disallow DR and offlining (5008695). |
| if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::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 -XX:+AggressiveOpts |
| 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 (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { |
| if (FLAG_IS_DEFAULT(EliminateAutoBox)) { |
| FLAG_SET_DEFAULT(EliminateAutoBox, true); |
| } |
| if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { |
| FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); |
| } |
| |
| // Feed the cache size setting into the JDK |
| char buffer[1024]; |
| sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); |
| if (!add_property(buffer)) { |
| return JNI_ENOMEM; |
| } |
| } |
| if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { |
| FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); |
| } |
| #endif |
| |
| if (AggressiveOpts) { |
| // Sample flag setting code |
| // if (FLAG_IS_DEFAULT(EliminateZeroing)) { |
| // FLAG_SET_DEFAULT(EliminateZeroing, true); |
| // } |
| } |
| |
| return JNI_OK; |
| } |
| |
| //=========================================================================================================== |
| // Parsing of java.compiler property |
| |
| void Arguments::process_java_compiler_argument(const char* arg) { |
| // For backwards compatibility, Djava.compiler=NONE or "" |
| // causes us to switch to -Xint mode UNLESS -Xdebug |
| // is also specified. |
| if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { |
| set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. |
| } |
| } |
| |
| void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { |
| _sun_java_launcher = os::strdup_check_oom(launcher); |
| } |
| |
| bool Arguments::created_by_java_launcher() { |
| assert(_sun_java_launcher != NULL, "property must have value"); |
| return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; |
| } |
| |
| bool Arguments::sun_java_launcher_is_altjvm() { |
| return _sun_java_launcher_is_altjvm; |
| } |
| |
| //=========================================================================================================== |
| // Parsing of main arguments |
| |
| #if INCLUDE_JVMCI |
| // Check consistency of jvmci vm argument settings. |
| bool Arguments::check_jvmci_args_consistency() { |
| if (!EnableJVMCI && !JVMCIGlobals::check_jvmci_flags_are_consistent()) { |
| JVMCIGlobals::print_jvmci_args_inconsistency_error_message(); |
| return false; |
| } |
| return true; |
| } |
| #endif //INCLUDE_JVMCI |
| |
| // Check consistency of GC selection |
| bool Arguments::check_gc_consistency() { |
| // Ensure that the user has not selected conflicting sets |
| // of collectors. |
| uint i = 0; |
| if (UseSerialGC) i++; |
| if (UseConcMarkSweepGC) i++; |
| if (UseParallelGC || UseParallelOldGC) i++; |
| if (UseG1GC) i++; |
| if (i > 1) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Conflicting collector combinations in option list; " |
| "please refer to the release notes for the combinations " |
| "allowed\n"); |
| return false; |
| } |
| |
| if (UseConcMarkSweepGC && !UseParNewGC) { |
| jio_fprintf(defaultStream::error_stream(), |
| "It is not possible to combine the DefNew young collector with the CMS collector.\n"); |
| return false; |
| } |
| |
| if (UseParNewGC && !UseConcMarkSweepGC) { |
| jio_fprintf(defaultStream::error_stream(), |
| "It is not possible to combine the ParNew young collector with any collector other than CMS.\n"); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| // Check the consistency of vm_init_args |
| bool Arguments::check_vm_args_consistency() { |
| // 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 " SIZE_FORMAT "\n", |
| TLABRefillWasteFraction); |
| status = false; |
| } |
| |
| if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { |
| MarkSweepAlwaysCompactCount = 1; // Move objects every gc. |
| } |
| |
| if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) { |
| FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false); |
| } |
| |
| if (GCTimeLimit == 100) { |
| // Turn off gc-overhead-limit-exceeded checks |
| FLAG_SET_DEFAULT(UseGCOverheadLimit, false); |
| } |
| |
| status = status && check_gc_consistency(); |
| |
| // CMS space iteration, which FLSVerifyAllHeapreferences entails, |
| // insists that we hold the requisite locks so that the iteration is |
| // MT-safe. For the verification at start-up and shut-down, we don't |
| // yet have a good way of acquiring and releasing these locks, |
| // which are not visible at the CollectedHeap level. We want to |
| // be able to acquire these locks and then do the iteration rather |
| // than just disable the lock verification. This will be fixed under |
| // bug 4788986. |
| if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { |
| if (VerifyDuringStartup) { |
| warning("Heap verification at start-up disabled " |
| "(due to current incompatibility with FLSVerifyAllHeapReferences)"); |
| VerifyDuringStartup = false; // Disable verification at start-up |
| } |
| |
| if (VerifyBeforeExit) { |
| warning("Heap verification at shutdown disabled " |
| "(due to current incompatibility with FLSVerifyAllHeapReferences)"); |
| VerifyBeforeExit = false; // Disable verification at shutdown |
| } |
| } |
| |
| if (PrintNMTStatistics) { |
| #if INCLUDE_NMT |
| if (MemTracker::tracking_level() == NMT_off) { |
| #endif // INCLUDE_NMT |
| warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled"); |
| PrintNMTStatistics = false; |
| #if INCLUDE_NMT |
| } |
| #endif |
| } |
| #if INCLUDE_JVMCI |
| |
| status = status && check_jvmci_args_consistency(); |
| |
| if (EnableJVMCI) { |
| if (!ScavengeRootsInCode) { |
| warning("forcing ScavengeRootsInCode non-zero because JVMCI is enabled"); |
| ScavengeRootsInCode = 1; |
| } |
| if (FLAG_IS_DEFAULT(TypeProfileLevel)) { |
| TypeProfileLevel = 0; |
| } |
| if (UseJVMCICompiler) { |
| if (FLAG_IS_DEFAULT(TypeProfileWidth)) { |
| TypeProfileWidth = 8; |
| } |
| } |
| } |
| #endif |
| |
| // Check lower bounds of the code cache |
| // Template Interpreter code is approximately 3X larger in debug builds. |
| uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3); |
| if (InitialCodeCacheSize < (uintx)os::vm_page_size()) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K, |
| os::vm_page_size()/K); |
| status = false; |
| } else if (ReservedCodeCacheSize < InitialCodeCacheSize) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n", |
| ReservedCodeCacheSize/K, InitialCodeCacheSize/K); |
| status = false; |
| } else if (ReservedCodeCacheSize < min_code_cache_size) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K, |
| min_code_cache_size/K); |
| status = false; |
| } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) { |
| // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported. |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M, |
| CODE_CACHE_SIZE_LIMIT/M); |
| status = false; |
| } else if (NonNMethodCodeHeapSize < min_code_cache_size) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K, |
| min_code_cache_size/K); |
| status = false; |
| } |
| |
| #ifdef _LP64 |
| if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) { |
| warning("The VM option CICompilerCountPerCPU overrides CICompilerCount."); |
| } |
| #endif |
| |
| #ifndef SUPPORT_RESERVED_STACK_AREA |
| if (StackReservedPages != 0) { |
| FLAG_SET_CMDLINE(intx, StackReservedPages, 0); |
| warning("Reserved Stack Area not supported on this platform"); |
| } |
| #endif |
| |
| if (BackgroundCompilation && (CompileTheWorld || ReplayCompiles)) { |
| if (!FLAG_IS_DEFAULT(BackgroundCompilation)) { |
| warning("BackgroundCompilation disabled due to CompileTheWorld or ReplayCompiles options."); |
| } |
| FLAG_SET_CMDLINE(bool, BackgroundCompilation, 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 == NULL) { |
| option_type = ++spacer; // Set both to the empty string. |
| } |
| |
| if (os::obsolete_option(option)) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Obsolete %s%soption: %s\n", option_type, spacer, |
| option->optionString); |
| return false; |
| } else { |
| 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", 0 |
| }; |
| |
| static const char* system_assertion_options[] = { |
| "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 |
| }; |
| |
| bool Arguments::parse_uintx(const char* value, |
| uintx* uintx_arg, |
| uintx min_size) { |
| |
| // Check the sign first since atomull() parses only unsigned values. |
| bool value_is_positive = !(*value == '-'); |
| |
| if (value_is_positive) { |
| julong n; |
| bool good_return = atomull(value, &n); |
| if (good_return) { |
| bool above_minimum = n >= min_size; |
| bool value_is_too_large = n > max_uintx; |
| |
| if (above_minimum && !value_is_too_large) { |
| *uintx_arg = n; |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| Arguments::ArgsRange Arguments::parse_memory_size(const char* s, |
| julong* long_arg, |
| julong min_size) { |
| if (!atomull(s, long_arg)) return arg_unreadable; |
| return check_memory_size(*long_arg, min_size); |
| } |
| |
| // Parse JavaVMInitArgs structure |
| |
| jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args, |
| const JavaVMInitArgs *java_options_args, |
| const JavaVMInitArgs *cmd_line_args) { |
| // For components of the system classpath. |
| ArgumentBootClassPath bcp(Arguments::get_sysclasspath()); |
| bool bcp_assembly_required = false; |
| |
| // Save default settings for some mode flags |
| Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; |
| Arguments::_UseOnStackReplacement = UseOnStackReplacement; |
| Arguments::_ClipInlining = ClipInlining; |
| Arguments::_BackgroundCompilation = BackgroundCompilation; |
| if (TieredCompilation) { |
| Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog; |
| Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold; |
| } |
| |
| // Setup flags for mixed which is the default |
| set_mode_flags(_mixed); |
| |
| // Parse args structure generated from JAVA_TOOL_OPTIONS environment |
| // variable (if present). |
| jint result = parse_each_vm_init_arg( |
| java_tool_options_args, &bcp, &bcp_assembly_required, Flag::ENVIRON_VAR); |
| if (result != JNI_OK) { |
| return result; |
| } |
| |
| // Parse args structure generated from the command line flags. |
| result = parse_each_vm_init_arg(cmd_line_args, &bcp, &bcp_assembly_required, |
| Flag::COMMAND_LINE); |
| if (result != JNI_OK) { |
| return result; |
| } |
| |
| // Parse args structure generated from the _JAVA_OPTIONS environment |
| // variable (if present) (mimics classic VM) |
| result = parse_each_vm_init_arg( |
| java_options_args, &bcp, &bcp_assembly_required, Flag::ENVIRON_VAR); |
| if (result != JNI_OK) { |
| return result; |
| } |
| |
| // Do final processing now that all arguments have been parsed |
| result = finalize_vm_init_args(&bcp, bcp_assembly_required); |
| if (result != JNI_OK) { |
| return result; |
| } |
| |
| return JNI_OK; |
| } |
| |
| // 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 |
| 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())) == NULL) { |
| 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; |
| } |
| |
| jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, |
| ArgumentBootClassPath* bcp_p, |
| bool* bcp_assembly_required_p, |
| Flag::Flags 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/gc/jni] |
| if (match_option(option, "-verbose", &tail)) { |
| if (!strcmp(tail, ":class") || !strcmp(tail, "")) { |
| LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(classload)); |
| LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(classunload)); |
| } else if (!strcmp(tail, ":gc")) { |
| LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc)); |
| } else if (!strcmp(tail, ":jni")) { |
| if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| } |
| // -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)) { |
| bcp_p->add_suffix(tail); |
| *bcp_assembly_required_p = true; |
| // -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 != NULL) { |
| const char* pos = strchr(tail, ':'); |
| size_t len = (pos == NULL) ? strlen(tail) : pos - tail; |
| char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len); |
| name[len] = '\0'; |
| |
| char *options = NULL; |
| if(pos != NULL) { |
| size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. |
| options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtInternal), 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 |
| add_init_library(name, options); |
| } |
| // -agentlib and -agentpath |
| } else if (match_option(option, "-agentlib:", &tail) || |
| (is_absolute_path = match_option(option, "-agentpath:", &tail))) { |
| if(tail != NULL) { |
| const char* pos = strchr(tail, '='); |
| size_t len = (pos == NULL) ? strlen(tail) : pos - tail; |
| char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len); |
| name[len] = '\0'; |
| |
| char *options = NULL; |
| if(pos != NULL) { |
| options = os::strdup_check_oom(pos + 1, mtInternal); |
| } |
| #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; |
| } |
| #endif // !INCLUDE_JVMTI |
| add_init_agent(name, options, is_absolute_path); |
| } |
| // -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 != NULL) { |
| char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1, mtInternal), tail); |
| add_init_agent("instrument", options, false); |
| // java agents need module java.instrument. Also -addmods ALL-SYSTEM because |
| // the java agent is in the unmamed module of the application class loader |
| if (!Arguments::append_to_addmods_property("java.instrument,ALL-SYSTEM")) { |
| return JNI_ENOMEM; |
| } |
| } |
| #endif // !INCLUDE_JVMTI |
| // -Xnoclassgc |
| } else if (match_option(option, "-Xnoclassgc")) { |
| if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| // -Xconcgc |
| } else if (match_option(option, "-Xconcgc")) { |
| if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| // -Xnoconcgc |
| } else if (match_option(option, "-Xnoconcgc")) { |
| if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| // -Xbatch |
| } else if (match_option(option, "-Xbatch")) { |
| if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::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(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| // -Xms |
| } else if (match_option(option, "-Xms", &tail)) { |
| julong long_initial_heap_size = 0; |
| // an initial heap size of 0 means automatically determine |
| ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_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; |
| } |
| set_min_heap_size((size_t)long_initial_heap_size); |
| // Currently the minimum size and the initial heap sizes are the same. |
| // Can be overridden with -XX:InitialHeapSize. |
| if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::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(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::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(uintx, MaxHeapFreeRatio, maxf) != Flag::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(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| } |
| // -Xss |
| } else if (match_option(option, "-Xss", &tail)) { |
| julong long_ThreadStackSize = 0; |
| ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); |
| if (errcode != arg_in_range) { |
| 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. |
| if (FLAG_SET_CMDLINE(intx, ThreadStackSize, |
| round_to((int)long_ThreadStackSize, K) / K) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| // -Xoss, -Xsqnopause, -Xoptimize, -Xboundthreads, -Xusealtsigs |
| } else if (match_option(option, "-Xoss", &tail) || |
| match_option(option, "-Xsqnopause") || |
| match_option(option, "-Xoptimize") || |
| match_option(option, "-Xboundthreads") || |
| match_option(option, "-Xusealtsigs")) { |
| // All these options are deprecated in JDK 9 and will be removed in a future release |
| char version[256]; |
| JDK_Version::jdk(9).to_string(version, sizeof(version)); |
| warning("Ignoring option %s; support was removed in %s", option->optionString, version); |
| } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) { |
| julong long_CodeCacheExpansionSize = 0; |
| ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size()); |
| if (errcode != arg_in_range) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid argument: %s. Must be at least %luK.\n", option->optionString, |
| os::vm_page_size()/K); |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize) != Flag::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(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| // -XX:NonNMethodCodeHeapSize= |
| } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) { |
| julong long_NonNMethodCodeHeapSize = 0; |
| |
| ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1); |
| if (errcode != arg_in_range) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString); |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| // -XX:ProfiledCodeHeapSize= |
| } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) { |
| julong long_ProfiledCodeHeapSize = 0; |
| |
| ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1); |
| if (errcode != arg_in_range) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid maximum profiled code heap size: %s.\n", option->optionString); |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| // -XX:NonProfiledCodeHeapSizee= |
| } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) { |
| julong long_NonProfiledCodeHeapSize = 0; |
| |
| ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1); |
| if (errcode != arg_in_range) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid maximum non-profiled code heap size: %s.\n", option->optionString); |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize) != Flag::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(bool, ReduceSignalUsage, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| // -Xprof |
| } else if (match_option(option, "-Xprof")) { |
| #if INCLUDE_FPROF |
| _has_profile = true; |
| #else // INCLUDE_FPROF |
| jio_fprintf(defaultStream::error_stream(), |
| "Flat profiling is not supported in this VM.\n"); |
| return JNI_ERR; |
| #endif // INCLUDE_FPROF |
| // -Xconcurrentio |
| } else if (match_option(option, "-Xconcurrentio")) { |
| if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation |
| return JNI_EINVAL; |
| } |
| |
| // -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")) { |
| CommandLineFlags::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; |
| } |
| |
| 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(bool, ManagementServer, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| // management agent in module java.management |
| if (!Arguments::append_to_addmods_property("java.management")) { |
| return JNI_ENOMEM; |
| } |
| #else |
| jio_fprintf(defaultStream::output_stream(), |
| "-Dcom.sun.management is not supported in this VM.\n"); |
| return JNI_ERR; |
| #endif |
| } |
| if (match_option(option, "-Djdk.launcher.patch.0=", &tail)) { |
| // -Xpatch |
| int dir_count; |
| char** patch_dirs = os::split_path(tail, &dir_count); |
| if (patch_dirs == NULL) { |
| jio_fprintf(defaultStream::output_stream(), |
| "Bad value for -Xpatch.\n"); |
| return JNI_ERR; |
| } |
| set_patch_dirs(patch_dirs); |
| set_patch_dirs_count(dir_count); |
| |
| // Create a path for each patch dir consisting of dir/java.base. |
| char file_sep = os::file_separator()[0]; |
| for (int x = 0; x < dir_count; x++) { |
| // Really shouldn't be NULL, but check can't hurt |
| if (patch_dirs[x] != NULL) { |
| size_t len = strlen(patch_dirs[x]); |
| if (len != 0) { // Ignore empty strings. |
| len += 11; // file_sep + "java.base" + null terminator. |
| char* dir = NEW_C_HEAP_ARRAY(char, len, mtInternal); |
| jio_snprintf(dir, len, "%s%cjava.base", patch_dirs[x], file_sep); |
| |
| // See if Xpatch module path exists. |
| struct stat st; |
| if ((os::stat(dir, &st) == 0)) { |
| bcp_p->add_prefix(dir); |
| *bcp_assembly_required_p = true; |
| } |
| FREE_C_HEAP_ARRAY(char, dir); |
| } |
| } |
| } |
| } |
| // -Xint |
| } else if (match_option(option, "-Xint")) { |
| set_mode_flags(_int); |
| // -Xmixed |
| } else if (match_option(option, "-Xmixed")) { |
| set_mode_flags(_mixed); |
| // -Xcomp |
| } else if (match_option(option, "-Xcomp")) { |
| // for testing the compiler; turn off all flags that inhibit compilation |
| set_mode_flags(_comp); |
| // -Xshare:dump |
| } else if (match_option(option, "-Xshare:dump")) { |
| if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| set_mode_flags(_int); // Prevent compilation, which creates objects |
| // -Xshare:on |
| } else if (match_option(option, "-Xshare:on")) { |
| if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| // -Xshare:auto |
| } else if (match_option(option, "-Xshare:auto")) { |
| if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| // -Xshare:off |
| } else if (match_option(option, "-Xshare:off")) { |
| if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| // -Xverify |
| } else if (match_option(option, "-Xverify", &tail)) { |
| if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { |
| if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| } else if (strcmp(tail, ":remote") == 0) { |
| if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| } else if (strcmp(tail, ":none") == 0) { |
| if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { |
| return JNI_EINVAL; |
| } |
| // -Xdebug |
| } else if (match_option(option, "-Xdebug")) { |
| // note this flag has been used, then ignore |
| set_xdebug_mode(true); |
| // -Xnoagent |
| } else if (match_option(option, "-Xnoagent")) { |
| // For compatibility with classic. HotSpot refuses to load the old style agent.dll. |
| } 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); |
| _gc_log_filename = os::strdup_check_oom(tail); |
| } else if (match_option(option, "-Xlog", &tail)) { |
| bool ret = false; |
| if (strcmp(tail, ":help") == 0) { |
| LogConfiguration::print_command_line_help(defaultStream::output_stream()); |
| vm_exit(0); |
| } else if (strcmp(tail, ":disable") == 0) { |
| LogConfiguration::disable_logging(); |
| ret = true; |
| } 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'\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); |
| // -XX:+AggressiveHeap |
| } else if (match_option(option, "-XX:+AggressiveHeap")) { |
| jint result = set_aggressive_heap_flags(); |
| if (result != JNI_OK) { |
| return result; |
| } |
| // 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(bool, NeverTenure, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| } else if (match_option(option, "-XX:+AlwaysTenure")) { |
| if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) { |
| uintx max_tenuring_thresh = 0; |
| if (!parse_uintx(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(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| |
| if (MaxTenuringThreshold == 0) { |
| if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| } else { |
| if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| } |
| } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) { |
| if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) { |
| if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) { |
| #if defined(DTRACE_ENABLED) |
| if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| #else // defined(DTRACE_ENABLED) |
| jio_fprintf(defaultStream::error_stream(), |
| "ExtendedDTraceProbes 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(bool, FullGCALot, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| // disable scavenge before parallel mark-compact |
| if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::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 |
| } 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:classpath=info |
| if (PrintSharedArchiveAndExit) { |
| if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) { |
| return JNI_EINVAL; |
| } |
| LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(classpath)); |
| } |
| |
| // Change the default value for flags which have different default values |
| // when working with older JDKs. |
| #ifdef LINUX |
| if (JDK_Version::current().compare_major(6) <= 0 && |
| FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) { |
| FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false); |
| } |
| #endif // LINUX |
| fix_appclasspath(); |
| return JNI_OK; |
| } |
| |
| // Set property jdk.boot.class.path.append to the contents of the bootclasspath |
| // that follows either the jimage file or exploded module directories. The |
| // property will contain -Xbootclasspath/a and/or jvmti appended additions. |
| void Arguments::set_jdkbootclasspath_append() { |
| char *sysclasspath = get_sysclasspath(); |
| assert(sysclasspath != NULL, "NULL sysclasspath"); |
| int bcp_a_idx = bootclassloader_append_index(); |
| if (bcp_a_idx != -1 && bcp_a_idx < (int)strlen(sysclasspath)) { |
| _jdk_boot_class_path_append->set_value(sysclasspath + bcp_a_idx); |
| } |
| } |
| |
| // 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, mtInternal); |
| |
| // 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 |
| } |
| } |
| |
| static bool has_jar_files(const char* directory) { |
| DIR* dir = os::opendir(directory); |
| if (dir == NULL) return false; |
| |
| struct dirent *entry; |
| char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal); |
| bool hasJarFile = false; |
| while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { |
| const char* name = entry->d_name; |
| const char* ext = name + strlen(name) - 4; |
| hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0); |
| } |
| FREE_C_HEAP_ARRAY(char, dbuf); |
| os::closedir(dir); |
| return hasJarFile ; |
| } |
| |
| static int check_non_empty_dirs(const char* path) { |
| const char separator = *os::path_separator(); |
| const char* const end = path + strlen(path); |
| int nonEmptyDirs = 0; |
| while (path < end) { |
| const char* tmp_end = strchr(path, separator); |
| if (tmp_end == NULL) { |
| if (has_jar_files(path)) { |
| nonEmptyDirs++; |
| jio_fprintf(defaultStream::output_stream(), |
| "Non-empty directory: %s\n", path); |
| } |
| path = end; |
| } else { |
| char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtInternal); |
| memcpy(dirpath, path, tmp_end - path); |
| dirpath[tmp_end - path] = '\0'; |
| if (has_jar_files(dirpath)) { |
| nonEmptyDirs++; |
| jio_fprintf(defaultStream::output_stream(), |
| "Non-empty directory: %s\n", dirpath); |
| } |
| FREE_C_HEAP_ARRAY(char, dirpath); |
| path = tmp_end + 1; |
| } |
| } |
| return nonEmptyDirs; |
| } |
| |
| jint Arguments::finalize_vm_init_args(ArgumentBootClassPath* bcp_p, bool bcp_assembly_required) { |
| // check if the default lib/endorsed directory exists; if so, error |
| char path[JVM_MAXPATHLEN]; |
| const char* fileSep = os::file_separator(); |
| sprintf(path, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep); |
| |
| if (CheckEndorsedAndExtDirs) { |
| int nonEmptyDirs = 0; |
| // check endorsed directory |
| nonEmptyDirs += check_non_empty_dirs(path); |
| // check the extension directories |
| nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs()); |
| if (nonEmptyDirs > 0) { |
| return JNI_ERR; |
| } |
| } |
| |
| DIR* dir = os::opendir(path); |
| if (dir != NULL) { |
| 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; |
| } |
| |
| sprintf(path, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep); |
| dir = os::opendir(path); |
| if (dir != NULL) { |
| 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; |
| } |
| |
| if (bcp_assembly_required) { |
| // Assemble the bootclasspath elements into the final path. |
| char *combined_path = bcp_p->combined_path(); |
| Arguments::set_sysclasspath(combined_path); |
| FREE_C_HEAP_ARRAY(char, combined_path); |
| } else { |
| // At this point in sysclasspath processing anything |
| // added would be considered in the boot loader's append path. |
| // Record this index, including +1 for the file separator character. |
| Arguments::set_bootclassloader_append_index(((int)strlen(Arguments::get_sysclasspath()))+1); |
| } |
| |
| // This must be done after all arguments have been processed. |
| // java_compiler() true means set to "NONE" or empty. |
| if (java_compiler() && !xdebug_mode()) { |
| // For backwards compatibility, we switch to interpreted mode if |
| // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was |
| // not specified. |
| set_mode_flags(_int); |
| } |
| |
| // 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); |
| } |
| |
| // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set |
| if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) { |
| FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold); |
| } |
| |
| #if !defined(COMPILER2) && !INCLUDE_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); |
| } |
| |
| #elif defined(COMPILER2) |
| if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { |
| FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); |
| } |
| #endif |
| |
| #ifndef TIERED |
| // Tiered compilation is undefined. |
| UNSUPPORTED_OPTION(TieredCompilation, "TieredCompilation"); |
| #endif |
| |
| // If we are running in a headless jre, force java.awt.headless property |
| // to be true unless the property has already been set. |
| // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state. |
| if (os::is_headless_jre()) { |
| const char* headless = Arguments::get_property("java.awt.headless"); |
| if (headless == NULL) { |
| const char *headless_env = ::getenv("JAVA_AWT_HEADLESS"); |
| if (headless_env == NULL) { |
| if (!add_property("java.awt.headless=true")) { |
| return JNI_ENOMEM; |
| } |
| } else { |
| char buffer[256]; |
| jio_snprintf(buffer, sizeof(buffer), "java.awt.headless=%s", headless_env); |
| if (!add_property(buffer)) { |
| return JNI_ENOMEM; |
| } |
| } |
| } |
| } |
| |
| if (UseConcMarkSweepGC && FLAG_IS_DEFAULT(UseParNewGC) && !UseParNewGC) { |
| // CMS can only be used with ParNew |
| FLAG_SET_ERGO(bool, UseParNewGC, true); |
| } |
| |
| if (!check_vm_args_consistency()) { |
| return JNI_ERR; |
| } |
| |
| 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 = NULL; |
| _args.ignoreUnrecognized = false; |
| _container_name = (char *)container_name; |
| _is_set = false; |
| _vm_options_file_arg = NULL; |
| } |
| |
| // 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(GrowableArray<JavaVMOption>* options) { |
| _is_set = true; |
| JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL( |
| JavaVMOption, options->length(), mtInternal); |
| if (options_arr == NULL) { |
| 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 == NULL) { |
| // 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 != NULL; } |
| 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 != NULL) { |
| os::free(_vm_options_file_arg); |
| } |
| _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg); |
| } |
| |
| ~ScopedVMInitArgs() { |
| if (_vm_options_file_arg != NULL) { |
| os::free(_vm_options_file_arg); |
| } |
| if (_args.options == NULL) 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 == NULL, "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; |
| GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal) |
| GrowableArray<JavaVMOption>(length, true); // Construct new option array |
| 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 |
| jint result = set_args(options); |
| delete options; |
| return result; |
| } |
| }; |
| |
| 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); |
| } |
| |
| 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 == NULL || os::have_special_privileges()) { |
| return JNI_OK; |
| } |
| |
| if ((buffer = os::strdup(buffer)) == NULL) { |
| return JNI_ENOMEM; |
| } |
| |
| 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); |
| os::close(fd); |
| return JNI_ERR; |
| } |
| |
| if (stbuf.st_size == 0) { |
| // tell caller there is no option data and that is ok |
| os::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, mtInternal); |
| if (NULL == buf) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Could not allocate read buffer for options file parse\n"); |
| os::close(fd); |
| return JNI_ENOMEM; |
| } |
| |
| memset(buf, 0, bytes_alloc); |
| |
| // Fill buffer |
| // Use ::read() instead of os::read because os::read() |
| // might do a thread state transition |
| // and it is too early for that here |
| |
| ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc); |
| os::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) { |
| GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JavaVMOption>(2, true); // Construct option array |
| |
| // 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(*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(*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); |
| delete options; |
| 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 = NULL; |
| |
| options->append(option); // Fill in option |
| |
| rd++; // Advance to next character |
| } |
| |
| // Fill out JavaVMInitArgs structure. |
| jint status = vm_args->set_args(options); |
| |
| delete options; |
| return status; |
| } |
| |
| void Arguments::set_shared_spaces_flags() { |
| if (DumpSharedSpaces) { |
| if (Arguments::patch_dirs() != NULL) { |
| vm_exit_during_initialization( |
| "Cannot use the following option when dumping the shared archive", "-Xpatch"); |
| } |
| |
| if (RequireSharedSpaces) { |
| warning("Cannot dump shared archive while using shared archive"); |
| } |
| UseSharedSpaces = false; |
| #ifdef _LP64 |
| if (!UseCompressedOops || !UseCompressedClassPointers) { |
| vm_exit_during_initialization( |
| "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL); |
| } |
| } else { |
| if (!UseCompressedOops || !UseCompressedClassPointers) { |
| no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces."); |
| } |
| #endif |
| } |
| } |
| |
| #if !INCLUDE_ALL_GCS |
| static void force_serial_gc() { |
| FLAG_SET_DEFAULT(UseSerialGC, true); |
| UNSUPPORTED_GC_OPTION(UseG1GC); |
| UNSUPPORTED_GC_OPTION(UseParallelGC); |
| UNSUPPORTED_GC_OPTION(UseParallelOldGC); |
| UNSUPPORTED_GC_OPTION(UseConcMarkSweepGC); |
| UNSUPPORTED_GC_OPTION(UseParNewGC); |
| } |
| #endif // INCLUDE_ALL_GCS |
| |
| // Sharing support |
| // Construct the path to the archive |
| static char* get_shared_archive_path() { |
| char *shared_archive_path; |
| if (SharedArchiveFile == NULL) { |
| char jvm_path[JVM_MAXPATHLEN]; |
| os::jvm_path(jvm_path, sizeof(jvm_path)); |
| char *end = strrchr(jvm_path, *os::file_separator()); |
| if (end != NULL) *end = '\0'; |
| size_t jvm_path_len = strlen(jvm_path); |
| size_t file_sep_len = strlen(os::file_separator()); |
| const size_t len = jvm_path_len + file_sep_len + 20; |
| shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtInternal); |
| if (shared_archive_path != NULL) { |
| jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa", |
| jvm_path, os::file_separator()); |
| } |
| } else { |
| shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtInternal); |
| } |
| return shared_archive_path; |
| } |
| |
| #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 || TraceDependencies || |
| (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 (ArgumentsExt::process_options(option)) { |
| continue; |
| } |
| 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")) { |
| CommandLineFlags::printFlags(tty, false); |
| vm_exit(0); |
| } |
| if (match_option(option, "-XX:NativeMemoryTracking", &tail)) { |
| #if INCLUDE_NMT |
| // The launcher did not setup nmt environment variable properly. |
| if (!MemTracker::check_launcher_nmt_support(tail)) { |
| warning("Native Memory Tracking did not setup properly, using wrong launcher?"); |
| } |
| |
| // Verify if nmt option is valid. |
| if (MemTracker::verify_nmt_option()) { |
| // Late initialization, still in single-threaded mode. |
| if (MemTracker::tracking_level() >= NMT_summary) { |
| MemTracker::init(); |
| } |
| } else { |
| vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL); |
| } |
| continue; |
| #else |
| jio_fprintf(defaultStream::error_stream(), |
| "Native Memory Tracking is not supported in this VM\n"); |
| return JNI_ERR; |
| #endif |
| } |
| |
| #ifndef PRODUCT |
| if (match_option(option, "-XX:+PrintFlagsWithComments")) { |
| CommandLineFlags::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 (_gc_log_filename != NULL) { |
| // -Xloggc was used to specify a filename |
| const char* gc_conf = PrintGCDetails ? "gc*" : "gc"; |
| return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, NULL); |
| } else if (PrintGC || PrintGCDetails) { |
| LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc)); |
| } |
| return true; |
| } |
| |
| // Parse entry point called from JNI_CreateJavaVM |
| |
| jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) { |
| assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent"); |
| |
| // Initialize ranges and constraints |
| CommandLineFlagRangeList::init(); |
| CommandLineFlagConstraintList::init(); |
| |
| // 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_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'"); |
| ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'"); |
| |
| // Pointers to current working set of containers |
| JavaVMInitArgs* cur_cmd_args; |
| JavaVMInitArgs* cur_java_options_args; |
| JavaVMInitArgs* cur_java_tool_options_args; |
| |
| // Containers for modified/expanded options |
| ScopedVMInitArgs mod_cmd_args("cmd_line_args"); |
| ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'"); |
| ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'"); |
| |
| |
| jint code = |
| parse_java_tool_options_environment_variable(&initial_java_tool_options_args); |
| if (code != JNI_OK) { |
| return code; |
| } |
| |
| code = parse_java_options_environment_variable(&initial_java_options_args); |
| 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; |
| } |
| |
| const char* flags_file = Arguments::get_jvm_flags_file(); |
| settings_file_specified = (flags_file != NULL); |
| |
| if (IgnoreUnrecognizedVMOptions) { |
| cur_cmd_args->ignoreUnrecognized = true; |
| cur_java_tool_options_args->ignoreUnrecognized = true; |
| cur_java_options_args->ignoreUnrecognized = true; |
| } |
| |
| // Parse specified settings file |
| if (settings_file_specified) { |
| if (!process_settings_file(flags_file, true, |
| cur_cmd_args->ignoreUnrecognized)) { |
| return JNI_EINVAL; |
| } |
| } else { |
| #ifdef ASSERT |
| // Parse default .hotspotrc settings file |
| if (!process_settings_file(".hotspotrc", false, |
| cur_cmd_args->ignoreUnrecognized)) { |
| return JNI_EINVAL; |
| } |
| #else |
| struct stat buf; |
| if (os::stat(hotspotrc, &buf) == 0) { |
| needs_hotspotrc_warning = true; |
| } |
| #endif |
| } |
| |
| if (PrintVMOptions) { |
| print_options(cur_java_tool_options_args); |
| print_options(cur_cmd_args); |
| print_options(cur_java_options_args); |
| } |
| |
| // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS |
| jint result = parse_vm_init_args(cur_java_tool_options_args, |
| cur_java_options_args, |
| cur_cmd_args); |
| |
| if (result != JNI_OK) { |
| return result; |
| } |
| |
| // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed. |
| SharedArchivePath = get_shared_archive_path(); |
| if (SharedArchivePath == NULL) { |
| return JNI_ENOMEM; |
| } |
| |
| // Set up VerifySharedSpaces |
| if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) { |
| VerifySharedSpaces = true; |
| } |
| |
| // 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 defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX. |
| UNSUPPORTED_OPTION(UseLargePages, "-XX:+UseLargePages"); |
| #endif |
| |
| ArgumentsExt::report_unsupported_options(); |
| |
| #ifndef PRODUCT |
| if (TraceBytecodesAt != 0) { |
| TraceBytecodes = true; |
| } |
| if (CountCompiledCalls) { |
| if (UseCounterDecay) { |
| warning("UseCounterDecay disabled because CountCalls is set"); |
| UseCounterDecay = false; |
| } |
| } |
| #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_ALL_GCS |
| force_serial_gc(); |
| #endif // INCLUDE_ALL_GCS |
| #if !INCLUDE_CDS |
| if (DumpSharedSpaces || RequireSharedSpaces) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Shared spaces are not supported in this VM\n"); |
| return JNI_ERR; |
| } |
| if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || PrintSharedSpaces) { |
| warning("Shared spaces are not supported in this VM"); |
| FLAG_SET_DEFAULT(UseSharedSpaces, false); |
| FLAG_SET_DEFAULT(PrintSharedSpaces, false); |
| } |
| no_shared_spaces("CDS Disabled"); |
| #endif // INCLUDE_CDS |
| |
| return JNI_OK; |
| } |
| |
| jint Arguments::apply_ergo() { |
| |
| // Set flags based on ergonomics. |
| set_ergonomics_flags(); |
| |
| set_shared_spaces_flags(); |
| |
| // Check the GC selections again. |
| if (!check_gc_consistency()) { |
| return JNI_EINVAL; |
| } |
| |
| if (TieredCompilation) { |
| set_tiered_flags(); |
| } else { |
| int max_compilation_policy_choice = 1; |
| #ifdef COMPILER2 |
| max_compilation_policy_choice = 2; |
| #endif |
| // Check if the policy is valid. |
| if (CompilationPolicyChoice >= max_compilation_policy_choice) { |
| vm_exit_during_initialization( |
| "Incompatible compilation policy selected", NULL); |
| } |
| // Scale CompileThreshold |
| // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged. |
| if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) { |
| FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold)); |
| } |
| } |
| |
| #ifdef COMPILER2 |
| #ifndef PRODUCT |
| if (PrintIdealGraphLevel > 0) { |
| FLAG_SET_ERGO(bool, PrintIdealGraph, true); |
| } |
| #endif |
| #endif |
| |
| // Set heap size based on available physical memory |
| set_heap_size(); |
| |
| ArgumentsExt::set_gc_specific_flags(); |
| |
| // Initialize Metaspace flags and alignments |
| Metaspace::ergo_initialize(); |
| |
| // Set bytecode rewriting flags |
| set_bytecode_flags(); |
| |
| // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled |
| jint code = set_aggressive_opts_flags(); |
| if (code != JNI_OK) { |
| return code; |
| } |
| |
| // Turn off biased locking for locking debug mode flags, |
| // which are subtly different from each other but neither works with |
| // biased locking |
| if (UseHeavyMonitors |
| #ifdef COMPILER1 |
| || !UseFastLocking |
| #endif // COMPILER1 |
| #if INCLUDE_JVMCI |
| || !JVMCIUseFastLocking |
| #endif |
| ) { |
| if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) { |
| // flag set to true on command line; warn the user that they |
| // can't enable biased locking here |
| warning("Biased Locking is not supported with locking debug flags" |
| "; ignoring UseBiasedLocking flag." ); |
| } |
| UseBiasedLocking = false; |
| } |
| |
| #ifdef CC_INTERP |
| // Clear flags not supported on zero. |
| FLAG_SET_DEFAULT(ProfileInterpreter, false); |
| FLAG_SET_DEFAULT(UseBiasedLocking, false); |
| LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false)); |
| LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false)); |
| #endif // CC_INTERP |
| |
| #ifdef COMPILER2 |
| if (!EliminateLocks) { |
| EliminateNestedLocks = false; |
| } |
| if (!Inline) { |
| IncrementalInline = false; |
| } |
| #ifndef PRODUCT |
| if (!IncrementalInline) { |
| AlwaysIncrementalInline = false; |
| } |
| #endif |
| if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) { |
| // nothing to use the profiling, turn if off |
| FLAG_SET_DEFAULT(TypeProfileLevel, 0); |
| } |
| #endif |
| |
| 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"); |
| } |
| |
| #ifndef PRODUCT |
| if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) { |
| if (use_vm_log()) { |
| LogVMOutput = true; |
| } |
| } |
| #endif // PRODUCT |
| |
| if (PrintCommandLineFlags) { |
| CommandLineFlags::printSetFlags(tty); |
| } |
| |
| // Apply CPU specific policy for the BiasedLocking |
| if (UseBiasedLocking) { |
| if (!VM_Version::use_biased_locking() && |
| !(FLAG_IS_CMDLINE(UseBiasedLocking))) { |
| UseBiasedLocking = false; |
| } |
| } |
| #ifdef COMPILER2 |
| if (!UseBiasedLocking || EmitSync != 0) { |
| UseOptoBiasInlining = false; |
| } |
| #endif |
| |
| return JNI_OK; |
| } |
| |
| jint Arguments::adjust_after_os() { |
| if (UseNUMA) { |
| if (UseParallelGC || UseParallelOldGC) { |
| if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) { |
| FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M); |
| } |
| } |
| // UseNUMAInterleaving is set to ON for all collectors and |
| // platforms when UseNUMA is set to ON. NUMA-aware collectors |
| // such as the parallel collector for Linux and Solaris will |
| // interleave old gen and survivor spaces on top of NUMA |
| // allocation policy for the eden space. |
| // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on |
| // all platforms and ParallelGC on Windows will interleave all |
| // of the heap spaces across NUMA nodes. |
| if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) { |
| FLAG_SET_ERGO(bool, UseNUMAInterleaving, true); |
| } |
| } |
| return JNI_OK; |
| } |
| |
| int Arguments::PropertyList_count(SystemProperty* pl) { |
| int count = 0; |
| while(pl != NULL) { |
| count++; |
| pl = pl->next(); |
| } |
| return count; |
| } |
| |
| const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { |
| assert(key != NULL, "just checking"); |
| SystemProperty* prop; |
| for (prop = pl; prop != NULL; prop = prop->next()) { |
| if (strcmp(key, prop->key()) == 0) return prop->value(); |
| } |
| return NULL; |
| } |
| |
| const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { |
| int count = 0; |
| const char* ret_val = NULL; |
| |
| while(pl != NULL) { |
| if(count >= index) { |
| ret_val = pl->key(); |
| break; |
| } |
| count++; |
| pl = pl->next(); |
| } |
| |
| return ret_val; |
| } |
| |
| char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { |
| int count = 0; |
| char* ret_val = NULL; |
| |
| while(pl != NULL) { |
| if(count >= index) { |
| ret_val = pl->value(); |
| break; |
| } |
| count++; |
| pl = pl->next(); |
| } |
| |
| return ret_val; |
| } |
| |
| void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { |
| SystemProperty* p = *plist; |
| if (p == NULL) { |
| *plist = new_p; |
| } else { |
| while (p->next() != NULL) { |
| p = p->next(); |
| } |
| p->set_next(new_p); |
| } |
| } |
| |
| void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v) { |
| if (plist == NULL) |
| return; |
| |
| SystemProperty* new_p = new SystemProperty(k, v, true); |
| 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, jboolean append) { |
| if (plist == NULL) |
| return; |
| |
| // If property key exist then update with new value. |
| SystemProperty* prop; |
| for (prop = *plist; prop != NULL; prop = prop->next()) { |
| if (strcmp(k, prop->key()) == 0) { |
| if (append) { |
| prop->append_value(v); |
| } else { |
| prop->set_writeable_value(v); |
| } |
| return; |
| } |
| } |
| |
| PropertyList_add(plist, k, v); |
| } |
| |
| // 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 |
| } |