| /* |
| * Copyright (c) 1997, 2010, 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 "incls/_precompiled.incl" |
| #include "incls/_arguments.cpp.incl" |
| |
| #define DEFAULT_VENDOR_URL_BUG "http://java.sun.com/webapps/bugreport/crash.jsp" |
| #define DEFAULT_JAVA_LAUNCHER "generic" |
| |
| 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; |
| bool Arguments::_has_alloc_profile = false; |
| uintx 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; |
| |
| // These parameters are reset in method parse_vm_init_args(JavaVMInitArgs*) |
| bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; |
| bool Arguments::_UseOnStackReplacement = UseOnStackReplacement; |
| bool Arguments::_BackgroundCompilation = BackgroundCompilation; |
| bool Arguments::_ClipInlining = ClipInlining; |
| intx Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; |
| |
| 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::_java_ext_dirs = NULL; |
| SystemProperty *Arguments::_java_endorsed_dirs = 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::_sun_boot_class_path = NULL; |
| |
| char* Arguments::_meta_index_path = NULL; |
| char* Arguments::_meta_index_dir = NULL; |
| |
| static bool force_client_mode = false; |
| |
| // Check if head of 'option' matches 'name', and sets 'tail' remaining part of option string |
| |
| static bool match_option(const JavaVMOption *option, const char* name, |
| const char** tail) { |
| int len = (int)strlen(name); |
| if (strncmp(option->optionString, name, len) == 0) { |
| *tail = option->optionString + len; |
| return true; |
| } else { |
| 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 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.pid=", &tail)) { |
| _sun_java_launcher_pid = atoi(tail); |
| continue; |
| } |
| } |
| } |
| |
| // Initialize system properties key and value. |
| void Arguments::init_system_properties() { |
| |
| PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.version", "1.0", false)); |
| PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", |
| "Java Virtual Machine Specification", false)); |
| PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.vendor", |
| "Sun Microsystems Inc.", 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.vendor", VM_Version::vm_vendor(), false)); |
| PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); |
| |
| // following are JVMTI agent writeable properties. |
| // Properties values are set to NULL and they are |
| // os specific they are initialized in os::init_system_properties_values(). |
| _java_ext_dirs = new SystemProperty("java.ext.dirs", NULL, true); |
| _java_endorsed_dirs = new SystemProperty("java.endorsed.dirs", NULL, true); |
| _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); |
| _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true); |
| |
| _java_class_path = new SystemProperty("java.class.path", "", true); |
| |
| // Add to System Property list. |
| PropertyList_add(&_system_properties, _java_ext_dirs); |
| PropertyList_add(&_system_properties, _java_endorsed_dirs); |
| 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, _sun_boot_class_path); |
| |
| // Set OS specific system properties values |
| os::init_system_properties_values(); |
| } |
| |
| /** |
| * Provide a slightly more user-friendly way of eliminating -XX flags. |
| * When a flag is eliminated, it can be added to this list in order to |
| * continue accepting this flag on the command-line, while issuing a warning |
| * and ignoring the value. Once the JDK version reaches the 'accept_until' |
| * limit, we flatly refuse to admit the existence of the flag. This allows |
| * a flag to die correctly over JDK releases using HSX. |
| */ |
| typedef struct { |
| const char* name; |
| JDK_Version obsoleted_in; // when the flag went away |
| JDK_Version accept_until; // which version to start denying the existence |
| } ObsoleteFlag; |
| |
| static ObsoleteFlag obsolete_jvm_flags[] = { |
| { "UseTrainGC", JDK_Version::jdk(5), JDK_Version::jdk(7) }, |
| { "UseSpecialLargeObjectHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, |
| { "UseOversizedCarHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, |
| { "TraceCarAllocation", JDK_Version::jdk(5), JDK_Version::jdk(7) }, |
| { "PrintTrainGCProcessingStats", JDK_Version::jdk(5), JDK_Version::jdk(7) }, |
| { "LogOfCarSpaceSize", JDK_Version::jdk(5), JDK_Version::jdk(7) }, |
| { "OversizedCarThreshold", JDK_Version::jdk(5), JDK_Version::jdk(7) }, |
| { "MinTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, |
| { "DefaultTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, |
| { "MaxTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, |
| { "DelayTickAdjustment", JDK_Version::jdk(5), JDK_Version::jdk(7) }, |
| { "ProcessingToTenuringRatio", JDK_Version::jdk(5), JDK_Version::jdk(7) }, |
| { "MinTrainLength", JDK_Version::jdk(5), JDK_Version::jdk(7) }, |
| { "AppendRatio", JDK_Version::jdk_update(6,10), JDK_Version::jdk(7) }, |
| { "DefaultMaxRAM", JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) }, |
| { "DefaultInitialRAMFraction", |
| JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) }, |
| { NULL, JDK_Version(0), JDK_Version(0) } |
| }; |
| |
| // Returns true if the flag is obsolete and fits into the range specified |
| // for being ignored. In the case that the flag is ignored, the 'version' |
| // value is filled in with the version number when the flag became |
| // obsolete so that that value can be displayed to the user. |
| bool Arguments::is_newly_obsolete(const char *s, JDK_Version* version) { |
| int i = 0; |
| assert(version != NULL, "Must provide a version buffer"); |
| while (obsolete_jvm_flags[i].name != NULL) { |
| const ObsoleteFlag& flag_status = obsolete_jvm_flags[i]; |
| // <flag>=xxx form |
| // [-|+]<flag> form |
| if ((strncmp(flag_status.name, s, strlen(flag_status.name)) == 0) || |
| ((s[0] == '+' || s[0] == '-') && |
| (strncmp(flag_status.name, &s[1], strlen(flag_status.name)) == 0))) { |
| if (JDK_Version::current().compare(flag_status.accept_until) == -1) { |
| *version = flag_status.obsoleted_in; |
| return true; |
| } |
| } |
| i++; |
| } |
| return false; |
| } |
| |
| // Constructs the system class path (aka boot class path) from the following |
| // components, in order: |
| // |
| // prefix // from -Xbootclasspath/p:... |
| // endorsed // the expansion of -Djava.endorsed.dirs=... |
| // base // from os::get_system_properties() or -Xbootclasspath= |
| // suffix // from -Xbootclasspath/a:... |
| // |
| // java.endorsed.dirs is a list of directories; any jar or zip files in the |
| // directories are added to the sysclasspath just before the base. |
| // |
| // This could be AllStatic, but it isn't needed after argument processing is |
| // complete. |
| class SysClassPath: public StackObj { |
| public: |
| SysClassPath(const char* base); |
| ~SysClassPath(); |
| |
| 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); |
| |
| // Expand the jar/zip files in each directory listed by the java.endorsed.dirs |
| // property. Must be called after all command-line arguments have been |
| // processed (in particular, -Djava.endorsed.dirs=...) and before calling |
| // combined_path(). |
| void expand_endorsed(); |
| |
| inline const char* get_base() const { return _items[_scp_base]; } |
| inline const char* get_prefix() const { return _items[_scp_prefix]; } |
| inline const char* get_suffix() const { return _items[_scp_suffix]; } |
| inline const char* get_endorsed() const { return _items[_scp_endorsed]; } |
| |
| // 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 { |
| _scp_prefix, // from -Xbootclasspath/p:... |
| _scp_endorsed, // the expansion of -Djava.endorsed.dirs=... |
| _scp_base, // the default sysclasspath |
| _scp_suffix, // from -Xbootclasspath/a:... |
| _scp_nitems // the number of items, must be last. |
| }; |
| |
| const char* _items[_scp_nitems]; |
| DEBUG_ONLY(bool _expansion_done;) |
| }; |
| |
| SysClassPath::SysClassPath(const char* base) { |
| memset(_items, 0, sizeof(_items)); |
| _items[_scp_base] = base; |
| DEBUG_ONLY(_expansion_done = false;) |
| } |
| |
| SysClassPath::~SysClassPath() { |
| // Free everything except the base. |
| for (int i = 0; i < _scp_nitems; ++i) { |
| if (i != _scp_base) reset_item_at(i); |
| } |
| DEBUG_ONLY(_expansion_done = false;) |
| } |
| |
| inline void SysClassPath::set_base(const char* base) { |
| _items[_scp_base] = base; |
| } |
| |
| inline void SysClassPath::add_prefix(const char* prefix) { |
| _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true); |
| } |
| |
| inline void SysClassPath::add_suffix_to_prefix(const char* suffix) { |
| _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false); |
| } |
| |
| inline void SysClassPath::add_suffix(const char* suffix) { |
| _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false); |
| } |
| |
| inline void SysClassPath::reset_item_at(int index) { |
| assert(index < _scp_nitems && index != _scp_base, "just checking"); |
| if (_items[index] != NULL) { |
| FREE_C_HEAP_ARRAY(char, _items[index]); |
| _items[index] = NULL; |
| } |
| } |
| |
| inline void SysClassPath::reset_path(const char* base) { |
| // Clear the prefix and suffix. |
| reset_item_at(_scp_prefix); |
| reset_item_at(_scp_suffix); |
| set_base(base); |
| } |
| |
| //------------------------------------------------------------------------------ |
| |
| void SysClassPath::expand_endorsed() { |
| assert(_items[_scp_endorsed] == NULL, "can only be called once."); |
| |
| const char* path = Arguments::get_property("java.endorsed.dirs"); |
| if (path == NULL) { |
| path = Arguments::get_endorsed_dir(); |
| assert(path != NULL, "no default for java.endorsed.dirs"); |
| } |
| |
| char* expanded_path = NULL; |
| const char separator = *os::path_separator(); |
| const char* const end = path + strlen(path); |
| while (path < end) { |
| const char* tmp_end = strchr(path, separator); |
| if (tmp_end == NULL) { |
| expanded_path = add_jars_to_path(expanded_path, path); |
| path = end; |
| } else { |
| char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1); |
| memcpy(dirpath, path, tmp_end - path); |
| dirpath[tmp_end - path] = '\0'; |
| expanded_path = add_jars_to_path(expanded_path, dirpath); |
| FREE_C_HEAP_ARRAY(char, dirpath); |
| path = tmp_end + 1; |
| } |
| } |
| _items[_scp_endorsed] = expanded_path; |
| DEBUG_ONLY(_expansion_done = true;) |
| } |
| |
| // Combine the bootclasspath elements, some of which may be null, into a single |
| // c-heap-allocated string. |
| char* SysClassPath::combined_path() { |
| assert(_items[_scp_base] != NULL, "empty default sysclasspath"); |
| assert(_expansion_done, "must call expand_endorsed() first."); |
| |
| size_t lengths[_scp_nitems]; |
| size_t total_len = 0; |
| |
| const char separator = *os::path_separator(); |
| |
| // Get the lengths. |
| int i; |
| for (i = 0; i < _scp_nitems; ++i) { |
| 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); |
| char* cp_tmp = cp; |
| for (i = 0; i < _scp_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* |
| SysClassPath::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); |
| 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); |
| 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); |
| 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* SysClassPath::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)); |
| 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)); |
| 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 = sscanf(s, os::julong_format_specifier(), &n); |
| if (args_read != 1) { |
| return false; |
| } |
| while (*s != '\0' && isdigit(*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(char* name, bool value, FlagValueOrigin origin) { |
| return CommandLineFlags::boolAtPut(name, &value, origin); |
| } |
| |
| static bool set_fp_numeric_flag(char* name, char* value, FlagValueOrigin origin) { |
| double v; |
| if (sscanf(value, "%lf", &v) != 1) { |
| return false; |
| } |
| |
| if (CommandLineFlags::doubleAtPut(name, &v, origin)) { |
| return true; |
| } |
| return false; |
| } |
| |
| static bool set_numeric_flag(char* name, char* value, FlagValueOrigin origin) { |
| julong v; |
| intx intx_v; |
| bool is_neg = false; |
| // Check the sign first since atomull() parses only unsigned values. |
| if (*value == '-') { |
| if (!CommandLineFlags::intxAt(name, &intx_v)) { |
| return false; |
| } |
| value++; |
| is_neg = true; |
| } |
| if (!atomull(value, &v)) { |
| return false; |
| } |
| intx_v = (intx) v; |
| if (is_neg) { |
| intx_v = -intx_v; |
| } |
| if (CommandLineFlags::intxAtPut(name, &intx_v, origin)) { |
| return true; |
| } |
| uintx uintx_v = (uintx) v; |
| if (!is_neg && CommandLineFlags::uintxAtPut(name, &uintx_v, origin)) { |
| return true; |
| } |
| uint64_t uint64_t_v = (uint64_t) v; |
| if (!is_neg && CommandLineFlags::uint64_tAtPut(name, &uint64_t_v, origin)) { |
| return true; |
| } |
| return false; |
| } |
| |
| static bool set_string_flag(char* name, const char* value, FlagValueOrigin origin) { |
| if (!CommandLineFlags::ccstrAtPut(name, &value, origin)) 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(char* name, const char* new_value, FlagValueOrigin origin) { |
| const char* old_value = ""; |
| if (!CommandLineFlags::ccstrAt(name, &old_value)) 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); |
| // 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; |
| } |
| |
| bool Arguments::parse_argument(const char* arg, FlagValueOrigin origin) { |
| |
| // range of acceptable characters spelled out for portability reasons |
| #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" |
| #define BUFLEN 255 |
| char name[BUFLEN+1]; |
| char dummy; |
| |
| if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { |
| return set_bool_flag(name, false, origin); |
| } |
| if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { |
| return set_bool_flag(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 = Flag::find_flag(name, strlen(name)); |
| if (flag != NULL && flag->is_ccstr()) { |
| if (flag->ccstr_accumulates()) { |
| return append_to_string_flag(name, value, origin); |
| } else { |
| if (value[0] == '\0') { |
| value = NULL; |
| } |
| return set_string_flag(name, value, origin); |
| } |
| } |
| } |
| |
| 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; |
| } |
| return set_string_flag(name, value, origin); |
| } |
| |
| #define SIGNED_FP_NUMBER_RANGE "[-0123456789.]" |
| #define SIGNED_NUMBER_RANGE "[-0123456789]" |
| #define NUMBER_RANGE "[0123456789]" |
| 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) { |
| return set_fp_numeric_flag(name, value, origin); |
| } |
| } |
| |
| #define VALUE_RANGE "[-kmgtKMGT0123456789]" |
| if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { |
| return set_numeric_flag(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 index = *count; |
| |
| // expand the array and add arg to the last element |
| (*count)++; |
| if (*bldarray == NULL) { |
| *bldarray = NEW_C_HEAP_ARRAY(char*, *count); |
| } else { |
| *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, *count); |
| } |
| (*bldarray)[index] = strdup(arg); |
| } |
| |
| 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); |
| } |
| if (num_jvm_args() > 0) { |
| st->print("jvm_args: "); print_jvm_args_on(st); |
| } |
| st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); |
| st->print_cr("Launcher Type: %s", _sun_java_launcher); |
| } |
| |
| 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]); |
| } |
| st->print_cr(""); |
| } |
| } |
| |
| 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]); |
| } |
| st->print_cr(""); |
| } |
| } |
| |
| bool Arguments::process_argument(const char* arg, |
| jboolean ignore_unrecognized, FlagValueOrigin origin) { |
| |
| JDK_Version since = JDK_Version(); |
| |
| if (parse_argument(arg, origin)) { |
| // do nothing |
| } else if (is_newly_obsolete(arg, &since)) { |
| enum { bufsize = 256 }; |
| char buffer[bufsize]; |
| since.to_string(buffer, bufsize); |
| jio_fprintf(defaultStream::error_stream(), |
| "Warning: The flag %s has been EOL'd as of %s and will" |
| " be ignored\n", arg, buffer); |
| } else { |
| if (!ignore_unrecognized) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Unrecognized VM option '%s'\n", arg); |
| // allow for commandline "commenting out" options like -XX:#+Verbose |
| if (strlen(arg) == 0 || arg[0] != '#') { |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| 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) { |
| 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, 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, 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, '='); |
| char* key; |
| // ns must be static--its address may be stored in a SystemProperty object. |
| const static char ns[1] = {0}; |
| char* value = (char *)ns; |
| |
| size_t key_len = (eq == NULL) ? strlen(prop) : (eq - prop); |
| key = AllocateHeap(key_len + 1, "add_property"); |
| strncpy(key, prop, key_len); |
| key[key_len] = '\0'; |
| |
| if (eq != NULL) { |
| size_t value_len = strlen(prop) - key_len - 1; |
| value = AllocateHeap(value_len + 1, "add_property"); |
| strncpy(value, &prop[key_len + 1], value_len + 1); |
| } |
| |
| if (strcmp(key, "java.compiler") == 0) { |
| process_java_compiler_argument(value); |
| FreeHeap(key); |
| if (eq != NULL) { |
| FreeHeap(value); |
| } |
| return true; |
| } else if (strcmp(key, "sun.java.command") == 0) { |
| _java_command = value; |
| |
| // don't add this property to the properties exposed to the java application |
| FreeHeap(key); |
| return true; |
| } else if (strcmp(key, "sun.java.launcher.pid") == 0) { |
| // launcher.pid property is private and is processed |
| // in process_sun_java_launcher_properties(); |
| // the sun.java.launcher property is passed on to the java application |
| FreeHeap(key); |
| if (eq != NULL) { |
| FreeHeap(value); |
| } |
| return true; |
| } else if (strcmp(key, "java.vendor.url.bug") == 0) { |
| // 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 = value; |
| } else if (strcmp(key, "sun.boot.library.path") == 0) { |
| PropertyList_unique_add(&_system_properties, key, value, true); |
| return true; |
| } |
| // Create new property and add at the end of the list |
| PropertyList_unique_add(&_system_properties, key, value); |
| return true; |
| } |
| |
| //=========================================================================================================== |
| // Setting int/mixed/comp mode flags |
| |
| void Arguments::set_mode_flags(Mode mode) { |
| // Set up default values for all flags. |
| // If you add a flag to any of the branches below, |
| // add a default value for it here. |
| 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", |
| (char*)Abstract_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; |
| Tier2CompileThreshold = Arguments::_Tier2CompileThreshold; |
| |
| // Change from defaults based on mode |
| switch (mode) { |
| default: |
| ShouldNotReachHere(); |
| break; |
| case _int: |
| UseCompiler = false; |
| UseLoopCounter = false; |
| AlwaysCompileLoopMethods = false; |
| UseOnStackReplacement = false; |
| break; |
| case _mixed: |
| // same as default |
| break; |
| case _comp: |
| UseInterpreter = false; |
| BackgroundCompilation = false; |
| ClipInlining = false; |
| break; |
| } |
| } |
| |
| // Conflict: required to use shared spaces (-Xshare:on), but |
| // incompatible command line options were chosen. |
| |
| static void no_shared_spaces() { |
| 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.", NULL); |
| } else { |
| FLAG_SET_DEFAULT(UseSharedSpaces, false); |
| } |
| } |
| |
| #ifndef KERNEL |
| // If the user has chosen ParallelGCThreads > 0, we set UseParNewGC |
| // if it's not explictly set or unset. If the user has chosen |
| // UseParNewGC and not explicitly set ParallelGCThreads we |
| // set it, unless this is a single cpu machine. |
| void Arguments::set_parnew_gc_flags() { |
| assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC, |
| "control point invariant"); |
| assert(UseParNewGC, "Error"); |
| |
| // Turn off AdaptiveSizePolicy by default for parnew until it is |
| // complete. |
| if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { |
| FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); |
| } |
| |
| if (ParallelGCThreads == 0) { |
| FLAG_SET_DEFAULT(ParallelGCThreads, |
| Abstract_VM_Version::parallel_worker_threads()); |
| if (ParallelGCThreads == 1) { |
| FLAG_SET_DEFAULT(UseParNewGC, false); |
| FLAG_SET_DEFAULT(ParallelGCThreads, 0); |
| } |
| } |
| if (UseParNewGC) { |
| // CDS doesn't work with ParNew yet |
| no_shared_spaces(); |
| |
| // 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); |
| } |
| |
| // AlwaysTenure flag should make ParNew promote all at first collection. |
| // See CR 6362902. |
| if (AlwaysTenure) { |
| FLAG_SET_CMDLINE(intx, MaxTenuringThreshold, 0); |
| } |
| // 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"); |
| |
| // If we are using CMS, we prefer to UseParNewGC, |
| // unless explicitly forbidden. |
| if (FLAG_IS_DEFAULT(UseParNewGC)) { |
| FLAG_SET_ERGO(bool, UseParNewGC, true); |
| } |
| |
| // Turn off AdaptiveSizePolicy by default for cms until it is |
| // complete. |
| if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { |
| FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); |
| } |
| |
| // In either case, adjust ParallelGCThreads and/or UseParNewGC |
| // as needed. |
| if (UseParNewGC) { |
| set_parnew_gc_flags(); |
| } |
| |
| // Now make adjustments for CMS |
| size_t young_gen_per_worker; |
| intx new_ratio; |
| size_t min_new_default; |
| intx tenuring_default; |
| if (CMSUseOldDefaults) { // old defaults: "old" as of 6.0 |
| if FLAG_IS_DEFAULT(CMSYoungGenPerWorker) { |
| FLAG_SET_ERGO(intx, CMSYoungGenPerWorker, 4*M); |
| } |
| young_gen_per_worker = 4*M; |
| new_ratio = (intx)15; |
| min_new_default = 4*M; |
| tenuring_default = (intx)0; |
| } else { // new defaults: "new" as of 6.0 |
| young_gen_per_worker = CMSYoungGenPerWorker; |
| new_ratio = (intx)7; |
| min_new_default = 16*M; |
| tenuring_default = (intx)4; |
| } |
| |
| // Preferred young gen size for "short" pauses |
| const uintx parallel_gc_threads = |
| (ParallelGCThreads == 0 ? 1 : ParallelGCThreads); |
| const size_t preferred_max_new_size_unaligned = |
| ScaleForWordSize(young_gen_per_worker * parallel_gc_threads); |
| const 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 ~ 4M*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(uintx, MaxNewSize, MAX2(NewSize, preferred_max_new_size)); |
| } else { |
| FLAG_SET_ERGO(uintx, MaxNewSize, preferred_max_new_size); |
| } |
| if (PrintGCDetails && Verbose) { |
| // Too early to use gclog_or_tty |
| tty->print_cr("Ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize); |
| } |
| |
| // Unless explicitly requested otherwise, prefer a large |
| // Old to Young gen size so as to shift the collection load |
| // to the old generation concurrent collector |
| |
| // If this is only guarded by FLAG_IS_DEFAULT(NewRatio) |
| // then NewSize and OldSize may be calculated. That would |
| // generally lead to some differences with ParNewGC for which |
| // there was no obvious reason. Also limit to the case where |
| // MaxNewSize has not been set. |
| |
| FLAG_SET_ERGO(intx, NewRatio, MAX2(NewRatio, new_ratio)); |
| |
| // Code along this path potentially sets NewSize and OldSize |
| |
| // Calculate the desired minimum size of the young gen but if |
| // NewSize has been set on the command line, use it here since |
| // it should be the final value. |
| size_t min_new; |
| if (FLAG_IS_DEFAULT(NewSize)) { |
| min_new = align_size_up(ScaleForWordSize(min_new_default), |
| os::vm_page_size()); |
| } else { |
| min_new = NewSize; |
| } |
| size_t prev_initial_size = InitialHeapSize; |
| if (prev_initial_size != 0 && prev_initial_size < min_new + OldSize) { |
| FLAG_SET_ERGO(uintx, InitialHeapSize, min_new + OldSize); |
| // Currently minimum size and the initial heap sizes are the same. |
| set_min_heap_size(InitialHeapSize); |
| if (PrintGCDetails && Verbose) { |
| warning("Initial heap size increased to " SIZE_FORMAT " M from " |
| SIZE_FORMAT " M; use -XX:NewSize=... for finer control.", |
| InitialHeapSize/M, prev_initial_size/M); |
| } |
| } |
| |
| // MaxHeapSize is aligned down in collectorPolicy |
| size_t max_heap = |
| align_size_down(MaxHeapSize, |
| CardTableRS::ct_max_alignment_constraint()); |
| |
| if (PrintGCDetails && Verbose) { |
| // Too early to use gclog_or_tty |
| tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT |
| " initial_heap_size: " SIZE_FORMAT |
| " max_heap: " SIZE_FORMAT, |
| min_heap_size(), InitialHeapSize, max_heap); |
| } |
| if (max_heap > 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(uintx, NewSize, MAX2(NewSize, min_new)); |
| FLAG_SET_ERGO(uintx, NewSize, MIN2(preferred_max_new_size, NewSize)); |
| if (PrintGCDetails && Verbose) { |
| // Too early to use gclog_or_tty |
| tty->print_cr("Ergo set NewSize: " SIZE_FORMAT, NewSize); |
| } |
| } |
| // Unless explicitly requested otherwise, size old gen |
| // so that it's at least 3X of NewSize to begin with; |
| // later NewRatio will decide how it grows; see above. |
| if (FLAG_IS_DEFAULT(OldSize)) { |
| if (max_heap > NewSize) { |
| FLAG_SET_ERGO(uintx, OldSize, MIN2(3*NewSize, max_heap - NewSize)); |
| if (PrintGCDetails && Verbose) { |
| // Too early to use gclog_or_tty |
| tty->print_cr("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(intx, 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(intx, SurvivorRatio, MAX2((intx)1024, SurvivorRatio)); |
| } |
| // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not, |
| // set CMSParPromoteBlocksToClaim equal to OldPLABSize. |
| // This is done in order to make ParNew+CMS configuration to work |
| // with YoungPLABSize and OldPLABSize options. |
| // See CR 6362902. |
| if (!FLAG_IS_DEFAULT(OldPLABSize)) { |
| if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { |
| // OldPLABSize is not the default value but CMSParPromoteBlocksToClaim |
| // is. In this situtation let CMSParPromoteBlocksToClaim follow |
| // the value (either from the command line or ergonomics) of |
| // OldPLABSize. Following OldPLABSize is an ergonomics decision. |
| FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, OldPLABSize); |
| } else { |
| // OldPLABSize and CMSParPromoteBlocksToClaim are both set. |
| // CMSParPromoteBlocksToClaim is a collector-specific flag, so |
| // we'll let it to take precedence. |
| jio_fprintf(defaultStream::error_stream(), |
| "Both OldPLABSize and CMSParPromoteBlocksToClaim" |
| " options are specified for the CMS collector." |
| " CMSParPromoteBlocksToClaim will take precedence.\n"); |
| } |
| } |
| 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. |
| if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { |
| FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, 50); // default value before 6631166 |
| } |
| } |
| // Overwrite OldPLABSize which is the variable we will internally use everywhere. |
| FLAG_SET_ERGO(uintx, OldPLABSize, CMSParPromoteBlocksToClaim); |
| // If either of the static initialization defaults have changed, note this |
| // modification. |
| if (!FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim) || !FLAG_IS_DEFAULT(OldPLABWeight)) { |
| CFLS_LAB::modify_initialization(OldPLABSize, OldPLABWeight); |
| } |
| if (PrintGCDetails && Verbose) { |
| tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", |
| MarkStackSize / K, MarkStackSizeMax / K); |
| tty->print_cr("ConcGCThreads: %u", ConcGCThreads); |
| } |
| } |
| #endif // KERNEL |
| |
| 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; |
| |
| #ifndef KERNEL |
| // Set CMS global values |
| CompactibleFreeListSpace::set_cms_values(); |
| #endif // KERNEL |
| } |
| |
| bool verify_object_alignment() { |
| // Object alignment. |
| if (!is_power_of_2(ObjectAlignmentInBytes)) { |
| jio_fprintf(defaultStream::error_stream(), |
| "error: ObjectAlignmentInBytes=%d must be power of 2", (int)ObjectAlignmentInBytes); |
| return false; |
| } |
| if ((int)ObjectAlignmentInBytes < BytesPerLong) { |
| jio_fprintf(defaultStream::error_stream(), |
| "error: ObjectAlignmentInBytes=%d must be greater or equal %d", (int)ObjectAlignmentInBytes, BytesPerLong); |
| return false; |
| } |
| return true; |
| } |
| |
| inline uintx max_heap_for_compressed_oops() { |
| LP64_ONLY(return OopEncodingHeapMax - MaxPermSize - os::vm_page_size()); |
| NOT_LP64(ShouldNotReachHere(); return 0); |
| } |
| |
| bool Arguments::should_auto_select_low_pause_collector() { |
| if (UseAutoGCSelectPolicy && |
| !FLAG_IS_DEFAULT(MaxGCPauseMillis) && |
| (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { |
| if (PrintGCDetails) { |
| // Cannot use gclog_or_tty yet. |
| tty->print_cr("Automatic selection of the low pause collector" |
| " based on pause goal of %d (ms)", MaxGCPauseMillis); |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| void Arguments::set_ergonomics_flags() { |
| // Parallel GC is not compatible with sharing. If one specifies |
| // that they want sharing explicitly, do not set ergonomics flags. |
| if (DumpSharedSpaces || ForceSharedSpaces) { |
| return; |
| } |
| |
| if (os::is_server_class_machine() && !force_client_mode ) { |
| // If no other collector is requested explicitly, |
| // let the VM select the collector based on |
| // machine class and automatic selection policy. |
| if (!UseSerialGC && |
| !UseConcMarkSweepGC && |
| !UseG1GC && |
| !UseParNewGC && |
| !DumpSharedSpaces && |
| FLAG_IS_DEFAULT(UseParallelGC)) { |
| if (should_auto_select_low_pause_collector()) { |
| FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); |
| } else { |
| FLAG_SET_ERGO(bool, UseParallelGC, true); |
| } |
| no_shared_spaces(); |
| } |
| } |
| |
| #ifndef ZERO |
| #ifdef _LP64 |
| // Check that UseCompressedOops can be set with the max heap size allocated |
| // by ergonomics. |
| if (MaxHeapSize <= max_heap_for_compressed_oops()) { |
| #ifndef COMPILER1 |
| if (FLAG_IS_DEFAULT(UseCompressedOops) && !UseG1GC) { |
| FLAG_SET_ERGO(bool, UseCompressedOops, true); |
| } |
| #endif |
| #ifdef _WIN64 |
| if (UseLargePages && UseCompressedOops) { |
| // Cannot allocate guard pages for implicit checks in indexed addressing |
| // mode, when large pages are specified on windows. |
| // This flag could be switched ON if narrow oop base address is set to 0, |
| // see code in Universe::initialize_heap(). |
| Universe::set_narrow_oop_use_implicit_null_checks(false); |
| } |
| #endif // _WIN64 |
| } else { |
| if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { |
| warning("Max heap size too large for Compressed Oops"); |
| FLAG_SET_DEFAULT(UseCompressedOops, false); |
| } |
| } |
| // Also checks that certain machines are slower with compressed oops |
| // in vm_version initialization code. |
| #endif // _LP64 |
| #endif // !ZERO |
| } |
| |
| void Arguments::set_parallel_gc_flags() { |
| assert(UseParallelGC || UseParallelOldGC, "Error"); |
| // If parallel old was requested, automatically enable parallel scavenge. |
| if (UseParallelOldGC && !UseParallelGC && FLAG_IS_DEFAULT(UseParallelGC)) { |
| 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. |
| if (UseParallelGC) { |
| FLAG_SET_ERGO(uintx, ParallelGCThreads, |
| Abstract_VM_Version::parallel_worker_threads()); |
| |
| // 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); |
| } |
| if (FLAG_IS_DEFAULT(PermMarkSweepDeadRatio)) { |
| FLAG_SET_DEFAULT(PermMarkSweepDeadRatio, 5); |
| } |
| } |
| } |
| } |
| |
| void Arguments::set_g1_gc_flags() { |
| assert(UseG1GC, "Error"); |
| #ifdef COMPILER1 |
| FastTLABRefill = false; |
| #endif |
| FLAG_SET_DEFAULT(ParallelGCThreads, |
| Abstract_VM_Version::parallel_worker_threads()); |
| if (ParallelGCThreads == 0) { |
| FLAG_SET_DEFAULT(ParallelGCThreads, |
| Abstract_VM_Version::parallel_worker_threads()); |
| } |
| no_shared_spaces(); |
| |
| if (FLAG_IS_DEFAULT(MarkStackSize)) { |
| FLAG_SET_DEFAULT(MarkStackSize, 128 * TASKQUEUE_SIZE); |
| } |
| if (PrintGCDetails && Verbose) { |
| tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", |
| MarkStackSize / K, MarkStackSizeMax / K); |
| tty->print_cr("ConcGCThreads: %u", ConcGCThreads); |
| } |
| |
| if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) { |
| // In G1, we want the default GC overhead goal to be higher than |
| // say in PS. So we set it here to 10%. Otherwise the heap might |
| // be expanded more aggressively than we would like it to. In |
| // fact, even 10% seems to not be high enough in some cases |
| // (especially small GC stress tests that the main thing they do |
| // is allocation). We might consider increase it further. |
| FLAG_SET_DEFAULT(GCTimeRatio, 9); |
| } |
| } |
| |
| void Arguments::set_heap_size() { |
| if (!FLAG_IS_DEFAULT(DefaultMaxRAMFraction)) { |
| // Deprecated flag |
| FLAG_SET_CMDLINE(uintx, MaxRAMFraction, DefaultMaxRAMFraction); |
| } |
| |
| 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 |
| reasonable_max = MIN2(reasonable_max, (julong)max_heap_for_compressed_oops()); |
| } |
| reasonable_max = os::allocatable_physical_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 allocatable_physical_memory because that |
| // method might reduce the allocation size. |
| reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); |
| } |
| |
| if (PrintGCDetails && Verbose) { |
| // Cannot use gclog_or_tty yet. |
| tty->print_cr(" Maximum heap size " SIZE_FORMAT, reasonable_max); |
| } |
| FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx)reasonable_max); |
| } |
| |
| // If the initial_heap_size has not been set with InitialHeapSize |
| // or -Xms, then set it as fraction of the size of physical memory, |
| // respecting the maximum and minimum sizes of the heap. |
| if (FLAG_IS_DEFAULT(InitialHeapSize)) { |
| julong reasonable_minimum = (julong)(OldSize + NewSize); |
| |
| reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); |
| |
| reasonable_minimum = os::allocatable_physical_memory(reasonable_minimum); |
| |
| julong reasonable_initial = phys_mem / InitialRAMFraction; |
| |
| reasonable_initial = MAX2(reasonable_initial, reasonable_minimum); |
| reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); |
| |
| reasonable_initial = os::allocatable_physical_memory(reasonable_initial); |
| |
| if (PrintGCDetails && Verbose) { |
| // Cannot use gclog_or_tty yet. |
| tty->print_cr(" Initial heap size " SIZE_FORMAT, (uintx)reasonable_initial); |
| tty->print_cr(" Minimum heap size " SIZE_FORMAT, (uintx)reasonable_minimum); |
| } |
| FLAG_SET_ERGO(uintx, InitialHeapSize, (uintx)reasonable_initial); |
| set_min_heap_size((uintx)reasonable_minimum); |
| } |
| } |
| |
| // This must be called after ergonomics because we want bytecode rewriting |
| // if the server compiler is used, or if UseSharedSpaces is disabled. |
| void Arguments::set_bytecode_flags() { |
| // Better not attempt to store into a read-only space. |
| if (UseSharedSpaces) { |
| FLAG_SET_DEFAULT(RewriteBytecodes, false); |
| FLAG_SET_DEFAULT(RewriteFrequentPairs, false); |
| } |
| |
| if (!RewriteBytecodes) { |
| FLAG_SET_DEFAULT(RewriteFrequentPairs, false); |
| } |
| } |
| |
| // Aggressive optimization flags -XX:+AggressiveOpts |
| void Arguments::set_aggressive_opts_flags() { |
| #ifdef COMPILER2 |
| 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); |
| add_property(buffer); |
| } |
| if (AggressiveOpts && FLAG_IS_DEFAULT(DoEscapeAnalysis)) { |
| FLAG_SET_DEFAULT(DoEscapeAnalysis, true); |
| } |
| if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { |
| FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); |
| } |
| if (AggressiveOpts && FLAG_IS_DEFAULT(OptimizeStringConcat)) { |
| FLAG_SET_DEFAULT(OptimizeStringConcat, true); |
| } |
| #endif |
| |
| if (AggressiveOpts) { |
| // Sample flag setting code |
| // if (FLAG_IS_DEFAULT(EliminateZeroing)) { |
| // FLAG_SET_DEFAULT(EliminateZeroing, true); |
| // } |
| } |
| } |
| |
| //=========================================================================================================== |
| // Parsing of java.compiler property |
| |
| void Arguments::process_java_compiler_argument(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 = strdup(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; |
| } |
| |
| //=========================================================================================================== |
| // Parsing of main arguments |
| |
| bool Arguments::verify_interval(uintx val, uintx min, |
| uintx max, const char* name) { |
| // Returns true iff value is in the inclusive interval [min..max] |
| // false, otherwise. |
| if (val >= min && val <= max) { |
| return true; |
| } |
| jio_fprintf(defaultStream::error_stream(), |
| "%s of " UINTX_FORMAT " is invalid; must be between " UINTX_FORMAT |
| " and " UINTX_FORMAT "\n", |
| name, val, min, max); |
| return false; |
| } |
| |
| bool Arguments::verify_percentage(uintx value, const char* name) { |
| if (value <= 100) { |
| return true; |
| } |
| jio_fprintf(defaultStream::error_stream(), |
| "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", |
| name, value); |
| return false; |
| } |
| |
| static void force_serial_gc() { |
| FLAG_SET_DEFAULT(UseSerialGC, true); |
| FLAG_SET_DEFAULT(UseParNewGC, false); |
| FLAG_SET_DEFAULT(UseConcMarkSweepGC, false); |
| FLAG_SET_DEFAULT(CMSIncrementalMode, false); // special CMS suboption |
| FLAG_SET_DEFAULT(UseParallelGC, false); |
| FLAG_SET_DEFAULT(UseParallelOldGC, false); |
| FLAG_SET_DEFAULT(UseG1GC, false); |
| } |
| |
| static bool verify_serial_gc_flags() { |
| return (UseSerialGC && |
| !(UseParNewGC || (UseConcMarkSweepGC || CMSIncrementalMode) || UseG1GC || |
| UseParallelGC || UseParallelOldGC)); |
| } |
| |
| // Check consistency of GC selection |
| bool Arguments::check_gc_consistency() { |
| bool status = true; |
| // Ensure that the user has not selected conflicting sets |
| // of collectors. [Note: this check is merely a user convenience; |
| // collectors over-ride each other so that only a non-conflicting |
| // set is selected; however what the user gets is not what they |
| // may have expected from the combination they asked for. It's |
| // better to reduce user confusion by not allowing them to |
| // select conflicting combinations. |
| uint i = 0; |
| if (UseSerialGC) i++; |
| if (UseConcMarkSweepGC || UseParNewGC) 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"); |
| status = false; |
| } |
| |
| return status; |
| } |
| |
| // 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 ( (defined(COMPILER2) && defined(SPARC))) |
| // NOTE: The call to VM_Version_init depends on the fact that VM_Version_init |
| // on sparc doesn't require generation of a stub as is the case on, e.g., |
| // x86. Normally, VM_Version_init must be called from init_globals in |
| // init.cpp, which is called by the initial java thread *after* arguments |
| // have been parsed. VM_Version_init gets called twice on sparc. |
| extern void VM_Version_init(); |
| VM_Version_init(); |
| if (!VM_Version::has_v9()) { |
| jio_fprintf(defaultStream::error_stream(), |
| "V8 Machine detected, Server requires V9\n"); |
| status = false; |
| } |
| #endif /* COMPILER2 && SPARC */ |
| |
| // Allow both -XX:-UseStackBanging and -XX:-UseBoundThreads in non-product |
| // builds so the cost of stack banging can be measured. |
| #if (defined(PRODUCT) && defined(SOLARIS)) |
| if (!UseBoundThreads && !UseStackBanging) { |
| jio_fprintf(defaultStream::error_stream(), |
| "-UseStackBanging conflicts with -UseBoundThreads\n"); |
| |
| status = false; |
| } |
| #endif |
| |
| if (TLABRefillWasteFraction == 0) { |
| jio_fprintf(defaultStream::error_stream(), |
| "TLABRefillWasteFraction should be a denominator, " |
| "not " SIZE_FORMAT "\n", |
| TLABRefillWasteFraction); |
| status = false; |
| } |
| |
| status = status && verify_percentage(MaxLiveObjectEvacuationRatio, |
| "MaxLiveObjectEvacuationRatio"); |
| status = status && verify_percentage(AdaptiveSizePolicyWeight, |
| "AdaptiveSizePolicyWeight"); |
| status = status && verify_percentage(AdaptivePermSizeWeight, "AdaptivePermSizeWeight"); |
| status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance"); |
| status = status && verify_percentage(MinHeapFreeRatio, "MinHeapFreeRatio"); |
| status = status && verify_percentage(MaxHeapFreeRatio, "MaxHeapFreeRatio"); |
| |
| if (MinHeapFreeRatio > MaxHeapFreeRatio) { |
| jio_fprintf(defaultStream::error_stream(), |
| "MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " |
| "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n", |
| MinHeapFreeRatio, MaxHeapFreeRatio); |
| status = false; |
| } |
| // Keeping the heap 100% free is hard ;-) so limit it to 99%. |
| MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99); |
| |
| if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { |
| MarkSweepAlwaysCompactCount = 1; // Move objects every gc. |
| } |
| |
| if (UseParallelOldGC && ParallelOldGCSplitALot) { |
| // Settings to encourage splitting. |
| if (!FLAG_IS_CMDLINE(NewRatio)) { |
| FLAG_SET_CMDLINE(intx, NewRatio, 2); |
| } |
| if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) { |
| FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); |
| } |
| } |
| |
| status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
| status = status && verify_percentage(GCTimeLimit, "GCTimeLimit"); |
| if (GCTimeLimit == 100) { |
| // Turn off gc-overhead-limit-exceeded checks |
| FLAG_SET_DEFAULT(UseGCOverheadLimit, false); |
| } |
| |
| status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
| |
| // Check whether user-specified sharing option conflicts with GC or page size. |
| // Both sharing and large pages are enabled by default on some platforms; |
| // large pages override sharing only if explicitly set on the command line. |
| const bool cannot_share = UseConcMarkSweepGC || CMSIncrementalMode || |
| UseG1GC || UseParNewGC || UseParallelGC || UseParallelOldGC || |
| UseLargePages && FLAG_IS_CMDLINE(UseLargePages); |
| if (cannot_share) { |
| // Either force sharing on by forcing the other options off, or |
| // force sharing off. |
| if (DumpSharedSpaces || ForceSharedSpaces) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Using Serial GC and default page size because of %s\n", |
| ForceSharedSpaces ? "-Xshare:on" : "-Xshare:dump"); |
| force_serial_gc(); |
| FLAG_SET_DEFAULT(UseLargePages, false); |
| } else { |
| if (UseSharedSpaces && Verbose) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Turning off use of shared archive because of " |
| "choice of garbage collector or large pages\n"); |
| } |
| no_shared_spaces(); |
| } |
| } else if (UseLargePages && (UseSharedSpaces || DumpSharedSpaces)) { |
| FLAG_SET_DEFAULT(UseLargePages, false); |
| } |
| |
| status = status && check_gc_consistency(); |
| |
| if (_has_alloc_profile) { |
| if (UseParallelGC || UseParallelOldGC) { |
| jio_fprintf(defaultStream::error_stream(), |
| "error: invalid argument combination.\n" |
| "Allocation profiling (-Xaprof) cannot be used together with " |
| "Parallel GC (-XX:+UseParallelGC or -XX:+UseParallelOldGC).\n"); |
| status = false; |
| } |
| if (UseConcMarkSweepGC) { |
| jio_fprintf(defaultStream::error_stream(), |
| "error: invalid argument combination.\n" |
| "Allocation profiling (-Xaprof) cannot be used together with " |
| "the CMS collector (-XX:+UseConcMarkSweepGC).\n"); |
| status = false; |
| } |
| } |
| |
| if (CMSIncrementalMode) { |
| if (!UseConcMarkSweepGC) { |
| jio_fprintf(defaultStream::error_stream(), |
| "error: invalid argument combination.\n" |
| "The CMS collector (-XX:+UseConcMarkSweepGC) must be " |
| "selected in order\nto use CMSIncrementalMode.\n"); |
| status = false; |
| } else { |
| status = status && verify_percentage(CMSIncrementalDutyCycle, |
| "CMSIncrementalDutyCycle"); |
| status = status && verify_percentage(CMSIncrementalDutyCycleMin, |
| "CMSIncrementalDutyCycleMin"); |
| status = status && verify_percentage(CMSIncrementalSafetyFactor, |
| "CMSIncrementalSafetyFactor"); |
| status = status && verify_percentage(CMSIncrementalOffset, |
| "CMSIncrementalOffset"); |
| status = status && verify_percentage(CMSExpAvgFactor, |
| "CMSExpAvgFactor"); |
| // If it was not set on the command line, set |
| // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. |
| if (CMSInitiatingOccupancyFraction < 0) { |
| FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); |
| } |
| } |
| } |
| |
| // 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 (VerifyGCStartAt == 0) { |
| warning("Heap verification at start-up disabled " |
| "(due to current incompatibility with FLSVerifyAllHeapReferences)"); |
| VerifyGCStartAt = 1; // 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 |
| } |
| } |
| |
| // Note: only executed in non-PRODUCT mode |
| if (!UseAsyncConcMarkSweepGC && |
| (ExplicitGCInvokesConcurrent || |
| ExplicitGCInvokesConcurrentAndUnloadsClasses)) { |
| jio_fprintf(defaultStream::error_stream(), |
| "error: +ExplictGCInvokesConcurrent[AndUnloadsClasses] conflicts" |
| " with -UseAsyncConcMarkSweepGC"); |
| status = false; |
| } |
| |
| if (UseG1GC) { |
| status = status && verify_percentage(InitiatingHeapOccupancyPercent, |
| "InitiatingHeapOccupancyPercent"); |
| } |
| |
| status = status && verify_interval(RefDiscoveryPolicy, |
| ReferenceProcessor::DiscoveryPolicyMin, |
| ReferenceProcessor::DiscoveryPolicyMax, |
| "RefDiscoveryPolicy"); |
| |
| // Limit the lower bound of this flag to 1 as it is used in a division |
| // expression. |
| status = status && verify_interval(TLABWasteTargetPercent, |
| 1, 100, "TLABWasteTargetPercent"); |
| |
| status = status && verify_object_alignment(); |
| |
| 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 |
| }; |
| |
| // 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; |
| } |
| |
| 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* args) { |
| // For components of the system classpath. |
| SysClassPath scp(Arguments::get_sysclasspath()); |
| bool scp_assembly_required = false; |
| |
| // Save default settings for some mode flags |
| Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; |
| Arguments::_UseOnStackReplacement = UseOnStackReplacement; |
| Arguments::_ClipInlining = ClipInlining; |
| Arguments::_BackgroundCompilation = BackgroundCompilation; |
| Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; |
| |
| // Parse JAVA_TOOL_OPTIONS environment variable (if present) |
| jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); |
| if (result != JNI_OK) { |
| return result; |
| } |
| |
| // Parse JavaVMInitArgs structure passed in |
| result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, COMMAND_LINE); |
| if (result != JNI_OK) { |
| return result; |
| } |
| |
| if (AggressiveOpts) { |
| // Insert alt-rt.jar between user-specified bootclasspath |
| // prefix and the default bootclasspath. os::set_boot_path() |
| // uses meta_index_dir as the default bootclasspath directory. |
| const char* altclasses_jar = "alt-rt.jar"; |
| size_t altclasses_path_len = strlen(get_meta_index_dir()) + 1 + |
| strlen(altclasses_jar); |
| char* altclasses_path = NEW_C_HEAP_ARRAY(char, altclasses_path_len); |
| strcpy(altclasses_path, get_meta_index_dir()); |
| strcat(altclasses_path, altclasses_jar); |
| scp.add_suffix_to_prefix(altclasses_path); |
| scp_assembly_required = true; |
| FREE_C_HEAP_ARRAY(char, altclasses_path); |
| } |
| |
| // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) |
| result = parse_java_options_environment_variable(&scp, &scp_assembly_required); |
| if (result != JNI_OK) { |
| return result; |
| } |
| |
| // Do final processing now that all arguments have been parsed |
| result = finalize_vm_init_args(&scp, scp_assembly_required); |
| if (result != JNI_OK) { |
| return result; |
| } |
| |
| return JNI_OK; |
| } |
| |
| jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, |
| SysClassPath* scp_p, |
| bool* scp_assembly_required_p, |
| FlagValueOrigin origin) { |
| // Remaining 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, "")) { |
| FLAG_SET_CMDLINE(bool, TraceClassLoading, true); |
| FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); |
| } else if (!strcmp(tail, ":gc")) { |
| FLAG_SET_CMDLINE(bool, PrintGC, true); |
| } else if (!strcmp(tail, ":jni")) { |
| FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); |
| } |
| // -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)) { |
| scp_p->reset_path(tail); |
| *scp_assembly_required_p = true; |
| // -bootclasspath/a: |
| } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { |
| scp_p->add_suffix(tail); |
| *scp_assembly_required_p = true; |
| // -bootclasspath/p: |
| } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { |
| scp_p->add_prefix(tail); |
| *scp_assembly_required_p = true; |
| // -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), 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), pos+1, len2); |
| } |
| #ifdef JVMTI_KERNEL |
| if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { |
| warning("profiling and debugging agents are not supported with Kernel VM"); |
| } else |
| #endif // JVMTI_KERNEL |
| 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), tail, len); |
| name[len] = '\0'; |
| |
| char *options = NULL; |
| if(pos != NULL) { |
| options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1), pos + 1); |
| } |
| #ifdef JVMTI_KERNEL |
| if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { |
| warning("profiling and debugging agents are not supported with Kernel VM"); |
| } else |
| #endif // JVMTI_KERNEL |
| add_init_agent(name, options, is_absolute_path); |
| |
| } |
| // -javaagent |
| } else if (match_option(option, "-javaagent:", &tail)) { |
| if(tail != NULL) { |
| char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1), tail); |
| add_init_agent("instrument", options, false); |
| } |
| // -Xnoclassgc |
| } else if (match_option(option, "-Xnoclassgc", &tail)) { |
| FLAG_SET_CMDLINE(bool, ClassUnloading, false); |
| // -Xincgc: i-CMS |
| } else if (match_option(option, "-Xincgc", &tail)) { |
| FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); |
| FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); |
| // -Xnoincgc: no i-CMS |
| } else if (match_option(option, "-Xnoincgc", &tail)) { |
| FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); |
| FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); |
| // -Xconcgc |
| } else if (match_option(option, "-Xconcgc", &tail)) { |
| FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); |
| // -Xnoconcgc |
| } else if (match_option(option, "-Xnoconcgc", &tail)) { |
| FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); |
| // -Xbatch |
| } else if (match_option(option, "-Xbatch", &tail)) { |
| FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); |
| // -Xmn for compatibility with other JVM vendors |
| } else if (match_option(option, "-Xmn", &tail)) { |
| julong long_initial_eden_size = 0; |
| ArgsRange errcode = parse_memory_size(tail, &long_initial_eden_size, 1); |
| if (errcode != arg_in_range) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid initial eden size: %s\n", option->optionString); |
| describe_range_error(errcode); |
| return JNI_EINVAL; |
| } |
| FLAG_SET_CMDLINE(uintx, MaxNewSize, (uintx)long_initial_eden_size); |
| FLAG_SET_CMDLINE(uintx, NewSize, (uintx)long_initial_eden_size); |
| // -Xms |
| } else if (match_option(option, "-Xms", &tail)) { |
| julong long_initial_heap_size = 0; |
| ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 1); |
| 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; |
| } |
| FLAG_SET_CMDLINE(uintx, InitialHeapSize, (uintx)long_initial_heap_size); |
| // Currently the minimum size and the initial heap sizes are the same. |
| set_min_heap_size(InitialHeapSize); |
| // -Xmx |
| } else if (match_option(option, "-Xmx", &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; |
| } |
| FLAG_SET_CMDLINE(uintx, MaxHeapSize, (uintx)long_max_heap_size); |
| // Xmaxf |
| } else if (match_option(option, "-Xmaxf", &tail)) { |
| int maxf = (int)(atof(tail) * 100); |
| if (maxf < 0 || maxf > 100) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Bad max heap free percentage size: %s\n", |
| option->optionString); |
| return JNI_EINVAL; |
| } else { |
| FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); |
| } |
| // Xminf |
| } else if (match_option(option, "-Xminf", &tail)) { |
| int minf = (int)(atof(tail) * 100); |
| if (minf < 0 || minf > 100) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Bad min heap free percentage size: %s\n", |
| option->optionString); |
| return JNI_EINVAL; |
| } else { |
| FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); |
| } |
| // -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. |
| FLAG_SET_CMDLINE(intx, ThreadStackSize, |
| round_to((int)long_ThreadStackSize, K) / K); |
| // -Xoss |
| } else if (match_option(option, "-Xoss", &tail)) { |
| // HotSpot does not have separate native and Java stacks, ignore silently for compatibility |
| // -Xmaxjitcodesize |
| } else if (match_option(option, "-Xmaxjitcodesize", &tail)) { |
| julong long_ReservedCodeCacheSize = 0; |
| ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, |
| (size_t)InitialCodeCacheSize); |
| if (errcode != arg_in_range) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid maximum code cache size: %s\n", |
| option->optionString); |
| describe_range_error(errcode); |
| return JNI_EINVAL; |
| } |
| FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); |
| // -green |
| } else if (match_option(option, "-green", &tail)) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Green threads support not available\n"); |
| return JNI_EINVAL; |
| // -native |
| } else if (match_option(option, "-native", &tail)) { |
| // HotSpot always uses native threads, ignore silently for compatibility |
| // -Xsqnopause |
| } else if (match_option(option, "-Xsqnopause", &tail)) { |
| // EVM option, ignore silently for compatibility |
| // -Xrs |
| } else if (match_option(option, "-Xrs", &tail)) { |
| // Classic/EVM option, new functionality |
| FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); |
| } else if (match_option(option, "-Xusealtsigs", &tail)) { |
| // change default internal VM signals used - lower case for back compat |
| FLAG_SET_CMDLINE(bool, UseAltSigs, true); |
| // -Xoptimize |
| } else if (match_option(option, "-Xoptimize", &tail)) { |
| // EVM option, ignore silently for compatibility |
| // -Xprof |
| } else if (match_option(option, "-Xprof", &tail)) { |
| #ifndef FPROF_KERNEL |
| _has_profile = true; |
| #else // FPROF_KERNEL |
| // do we have to exit? |
| warning("Kernel VM does not support flat profiling."); |
| #endif // FPROF_KERNEL |
| // -Xaprof |
| } else if (match_option(option, "-Xaprof", &tail)) { |
| _has_alloc_profile = true; |
| // -Xconcurrentio |
| } else if (match_option(option, "-Xconcurrentio", &tail)) { |
| FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); |
| FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); |
| FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); |
| FLAG_SET_CMDLINE(bool, UseTLAB, false); |
| FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation |
| |
| // -Xinternalversion |
| } else if (match_option(option, "-Xinternalversion", &tail)) { |
| 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", &tail)) { |
| CommandLineFlags::printFlags(); |
| vm_exit(0); |
| #endif |
| // -D |
| } else if (match_option(option, "-D", &tail)) { |
| if (!add_property(tail)) { |
| return JNI_ENOMEM; |
| } |
| // Out of the box management support |
| if (match_option(option, "-Dcom.sun.management", &tail)) { |
| FLAG_SET_CMDLINE(bool, ManagementServer, true); |
| } |
| // -Xint |
| } else if (match_option(option, "-Xint", &tail)) { |
| set_mode_flags(_int); |
| // -Xmixed |
| } else if (match_option(option, "-Xmixed", &tail)) { |
| set_mode_flags(_mixed); |
| // -Xcomp |
| } else if (match_option(option, "-Xcomp", &tail)) { |
| // for testing the compiler; turn off all flags that inhibit compilation |
| set_mode_flags(_comp); |
| |
| // -Xshare:dump |
| } else if (match_option(option, "-Xshare:dump", &tail)) { |
| #ifdef TIERED |
| FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); |
| set_mode_flags(_int); // Prevent compilation, which creates objects |
| #elif defined(COMPILER2) |
| vm_exit_during_initialization( |
| "Dumping a shared archive is not supported on the Server JVM.", NULL); |
| #elif defined(KERNEL) |
| vm_exit_during_initialization( |
| "Dumping a shared archive is not supported on the Kernel JVM.", NULL); |
| #else |
| FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); |
| set_mode_flags(_int); // Prevent compilation, which creates objects |
| #endif |
| // -Xshare:on |
| } else if (match_option(option, "-Xshare:on", &tail)) { |
| FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); |
| FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); |
| #ifdef TIERED |
| FLAG_SET_CMDLINE(bool, ForceSharedSpaces, true); |
| #endif // TIERED |
| // -Xshare:auto |
| } else if (match_option(option, "-Xshare:auto", &tail)) { |
| FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); |
| FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); |
| // -Xshare:off |
| } else if (match_option(option, "-Xshare:off", &tail)) { |
| FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); |
| FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); |
| |
| // -Xverify |
| } else if (match_option(option, "-Xverify", &tail)) { |
| if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { |
| FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); |
| FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); |
| } else if (strcmp(tail, ":remote") == 0) { |
| FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); |
| FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); |
| } else if (strcmp(tail, ":none") == 0) { |
| FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); |
| FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); |
| } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { |
| return JNI_EINVAL; |
| } |
| // -Xdebug |
| } else if (match_option(option, "-Xdebug", &tail)) { |
| // note this flag has been used, then ignore |
| set_xdebug_mode(true); |
| // -Xnoagent |
| } else if (match_option(option, "-Xnoagent", &tail)) { |
| // For compatibility with classic. HotSpot refuses to load the old style agent.dll. |
| } else if (match_option(option, "-Xboundthreads", &tail)) { |
| // Bind user level threads to kernel threads (Solaris only) |
| FLAG_SET_CMDLINE(bool, UseBoundThreads, true); |
| } else if (match_option(option, "-Xloggc:", &tail)) { |
| // Redirect GC output to the file. -Xloggc:<filename> |
| // ostream_init_log(), when called will use this filename |
| // to initialize a fileStream. |
| _gc_log_filename = strdup(tail); |
| FLAG_SET_CMDLINE(bool, PrintGC, true); |
| FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); |
| FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); |
| |
| // JNI hooks |
| } else if (match_option(option, "-Xcheck", &tail)) { |
| if (!strcmp(tail, ":jni")) { |
| CheckJNICalls = true; |
| } else if (is_bad_option(option, args->ignoreUnrecognized, |
| "check")) { |
| return JNI_EINVAL; |
| } |
| } else if (match_option(option, "vfprintf", &tail)) { |
| _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); |
| } else if (match_option(option, "exit", &tail)) { |
| _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); |
| } else if (match_option(option, "abort", &tail)) { |
| _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); |
| // -XX:+AggressiveHeap |
| } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { |
| |
| // 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. |
| |
| // 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); |
| |
| // Make sure that if we have a lot of memory we cap the 32 bit |
| // process space. The 64bit VM version of this function is a nop. |
| initHeapSize = os::allocatable_physical_memory(initHeapSize); |
| |
| // The perm gen is separate but contiguous with the |
| // object heap (and is reserved with it) so subtract it |
| // from the heap size. |
| if (initHeapSize > MaxPermSize) { |
| initHeapSize = initHeapSize - MaxPermSize; |
| } else { |
| warning("AggressiveHeap and MaxPermSize values may conflict"); |
| } |
| |
| if (FLAG_IS_DEFAULT(MaxHeapSize)) { |
| FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); |
| FLAG_SET_CMDLINE(uintx, InitialHeapSize, initHeapSize); |
| // 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. |
| FLAG_SET_CMDLINE(uintx, NewSize, |
| ((julong)MaxHeapSize / (julong)8) * (julong)3); |
| FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); |
| } |
| |
| FLAG_SET_DEFAULT(UseLargePages, true); |
| |
| // Increase some data structure sizes for efficiency |
| FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); |
| FLAG_SET_CMDLINE(bool, ResizeTLAB, false); |
| FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); |
| |
| // 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. |
| FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words |
| |
| // 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. |
| FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words |
| |
| // CompilationPolicyChoice=0 causes the server compiler to adopt |
| // a more conservative which-method-do-I-compile policy when one |
| // of the counters maintained by the interpreter trips. The |
| // result is reduced startup time and improved specjbb and |
| // alacrity performance. Zero is the default, but we set it |
| // explicitly here in case the default changes. |
| // See runtime/compilationPolicy.*. |
| FLAG_SET_CMDLINE(intx, CompilationPolicyChoice, 0); |
| |
| // Enable parallel GC and adaptive generation sizing |
| FLAG_SET_CMDLINE(bool, UseParallelGC, true); |
| FLAG_SET_DEFAULT(ParallelGCThreads, |
| Abstract_VM_Version::parallel_worker_threads()); |
| |
| // Encourage steady state memory management |
| FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); |
| |
| // This appears to improve mutator locality |
| FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); |
| |
| // Get around early Solaris scheduling bug |
| // (affinity vs other jobs on system) |
| // but disallow DR and offlining (5008695). |
| FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); |
| |
| } else if (match_option(option, "-XX:+NeverTenure", &tail)) { |
| // The last option must always win. |
| FLAG_SET_CMDLINE(bool, AlwaysTenure, false); |
| FLAG_SET_CMDLINE(bool, NeverTenure, true); |
| } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { |
| // The last option must always win. |
| FLAG_SET_CMDLINE(bool, NeverTenure, false); |
| FLAG_SET_CMDLINE(bool, AlwaysTenure, true); |
| } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || |
| match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Please use CMSClassUnloadingEnabled in place of " |
| "CMSPermGenSweepingEnabled in the future\n"); |
| } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { |
| FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); |
| jio_fprintf(defaultStream::error_stream(), |
| "Please use -XX:+UseGCOverheadLimit in place of " |
| "-XX:+UseGCTimeLimit in the future\n"); |
| } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { |
| FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); |
| jio_fprintf(defaultStream::error_stream(), |
| "Please use -XX:-UseGCOverheadLimit in place of " |
| "-XX:-UseGCTimeLimit in the future\n"); |
| // The TLE options are for compatibility with 1.3 and will be |
| // removed without notice in a future release. These options |
| // are not to be documented. |
| } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { |
| // No longer used. |
| } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { |
| FLAG_SET_CMDLINE(bool, ResizeTLAB, true); |
| } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { |
| FLAG_SET_CMDLINE(bool, ResizeTLAB, false); |
| } else if (match_option(option, "-XX:+PrintTLE", &tail)) { |
| FLAG_SET_CMDLINE(bool, PrintTLAB, true); |
| } else if (match_option(option, "-XX:-PrintTLE", &tail)) { |
| FLAG_SET_CMDLINE(bool, PrintTLAB, false); |
| } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { |
| // No longer used. |
| } else if (match_option(option, "-XX:TLESize=", &tail)) { |
| julong long_tlab_size = 0; |
| ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); |
| if (errcode != arg_in_range) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid TLAB size: %s\n", option->optionString); |
| describe_range_error(errcode); |
| return JNI_EINVAL; |
| } |
| FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); |
| } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { |
| // No longer used. |
| } else if (match_option(option, "-XX:+UseTLE", &tail)) { |
| FLAG_SET_CMDLINE(bool, UseTLAB, true); |
| } else if (match_option(option, "-XX:-UseTLE", &tail)) { |
| FLAG_SET_CMDLINE(bool, UseTLAB, false); |
| SOLARIS_ONLY( |
| } else if (match_option(option, "-XX:+UsePermISM", &tail)) { |
| warning("-XX:+UsePermISM is obsolete."); |
| FLAG_SET_CMDLINE(bool, UseISM, true); |
| } else if (match_option(option, "-XX:-UsePermISM", &tail)) { |
| FLAG_SET_CMDLINE(bool, UseISM, false); |
| ) |
| } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { |
| FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); |
| FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); |
| } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { |
| FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); |
| FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); |
| } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { |
| #ifdef SOLARIS |
| FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); |
| FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); |
| FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); |
| FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); |
| #else // ndef SOLARIS |
| jio_fprintf(defaultStream::error_stream(), |
| "ExtendedDTraceProbes flag is only applicable on Solaris\n"); |
| return JNI_EINVAL; |
| #endif // ndef SOLARIS |
| #ifdef ASSERT |
| } else if (match_option(option, "-XX:+FullGCALot", &tail)) { |
| FLAG_SET_CMDLINE(bool, FullGCALot, true); |
| // disable scavenge before parallel mark-compact |
| FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); |
| #endif |
| } else if (match_option(option, "-XX:CMSParPromoteBlocksToClaim=", &tail)) { |
| julong cms_blocks_to_claim = (julong)atol(tail); |
| FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); |
| jio_fprintf(defaultStream::error_stream(), |
| "Please use -XX:OldPLABSize in place of " |
| "-XX:CMSParPromoteBlocksToClaim in the future\n"); |
| } else if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { |
| julong cms_blocks_to_claim = (julong)atol(tail); |
| FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); |
| jio_fprintf(defaultStream::error_stream(), |
| "Please use -XX:OldPLABSize in place of " |
| "-XX:ParCMSPromoteBlocksToClaim in the future\n"); |
| } else if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { |
| julong old_plab_size = 0; |
| ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); |
| if (errcode != arg_in_range) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid old PLAB size: %s\n", option->optionString); |
| describe_range_error(errcode); |
| return JNI_EINVAL; |
| } |
| FLAG_SET_CMDLINE(uintx, OldPLABSize, old_plab_size); |
| jio_fprintf(defaultStream::error_stream(), |
| "Please use -XX:OldPLABSize in place of " |
| "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); |
| } else if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { |
| julong young_plab_size = 0; |
| ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); |
| if (errcode != arg_in_range) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid young PLAB size: %s\n", option->optionString); |
| describe_range_error(errcode); |
| return JNI_EINVAL; |
| } |
| FLAG_SET_CMDLINE(uintx, YoungPLABSize, young_plab_size); |
| jio_fprintf(defaultStream::error_stream(), |
| "Please use -XX:YoungPLABSize in place of " |
| "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); |
| } else if (match_option(option, "-XX:CMSMarkStackSize=", &tail) || |
| match_option(option, "-XX:G1MarkStackSize=", &tail)) { |
| julong stack_size = 0; |
| ArgsRange errcode = parse_memory_size(tail, &stack_size, 1); |
| if (errcode != arg_in_range) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid mark stack size: %s\n", option->optionString); |
| describe_range_error(errcode); |
| return JNI_EINVAL; |
| } |
| FLAG_SET_CMDLINE(uintx, MarkStackSize, stack_size); |
| } else if (match_option(option, "-XX:CMSMarkStackSizeMax=", &tail)) { |
| julong max_stack_size = 0; |
| ArgsRange errcode = parse_memory_size(tail, &max_stack_size, 1); |
| if (errcode != arg_in_range) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid maximum mark stack size: %s\n", |
| option->optionString); |
| describe_range_error(errcode); |
| return JNI_EINVAL; |
| } |
| FLAG_SET_CMDLINE(uintx, MarkStackSizeMax, max_stack_size); |
| } else if (match_option(option, "-XX:ParallelMarkingThreads=", &tail) || |
| match_option(option, "-XX:ParallelCMSThreads=", &tail)) { |
| uintx conc_threads = 0; |
| if (!parse_uintx(tail, &conc_threads, 1)) { |
| jio_fprintf(defaultStream::error_stream(), |
| "Invalid concurrent threads: %s\n", option->optionString); |
| return JNI_EINVAL; |
| } |
| FLAG_SET_CMDLINE(uintx, ConcGCThreads, conc_threads); |
| } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx |
| // Skip -XX:Flags= since that case has already been handled |
| if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { |
| if (!process_argument(tail, args->ignoreUnrecognized, origin)) { |
| return JNI_EINVAL; |
| } |
| } |
| // Unknown option |
| } else if (is_bad_option(option, args->ignoreUnrecognized)) { |
| return JNI_ERR; |
| } |
| } |
| // Change the default value for flags which have different default values |
| // when working with older JDKs. |
| if (JDK_Version::current().compare_major(6) <= 0 && |
| FLAG_IS_DEFAULT(UseVMInterruptibleIO)) { |
| FLAG_SET_DEFAULT(UseVMInterruptibleIO, true); |
| } |
| return JNI_OK; |
| } |
| |
| jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { |
| // This must be done after all -D arguments have been processed. |
| scp_p->expand_endorsed(); |
| |
| if (scp_assembly_required || scp_p->get_endorsed() != NULL) { |
| // Assemble the bootclasspath elements into the final path. |
| Arguments::set_sysclasspath(scp_p->combined_path()); |
| } |
| |
| // 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); |
| } |
| if (CompileThreshold == 0) { |
| set_mode_flags(_int); |
| } |
| |
| #ifdef TIERED |
| // If we are using tiered compilation in the tiered vm then c1 will |
| // do the profiling and we don't want to waste that time in the |
| // interpreter. |
| if (TieredCompilation) { |
| ProfileInterpreter = false; |
| } else { |
| // Since we are running vanilla server we must adjust the compile threshold |
| // unless the user has already adjusted it because the default threshold assumes |
| // we will run tiered. |
| |
| if (FLAG_IS_DEFAULT(CompileThreshold)) { |
| CompileThreshold = Tier2CompileThreshold; |
| } |
| } |
| #endif // TIERED |
| |
| #ifndef COMPILER2 |
| // 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); |
| SOLARIS_ONLY(FLAG_SET_DEFAULT(UseMPSS, false)); |
| SOLARIS_ONLY(FLAG_SET_DEFAULT(UseISM, false)); |
| } |
| |
| // Tiered compilation is undefined with C1. |
| TieredCompilation = false; |
| |
| #else |
| if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { |
| FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); |
| } |
| // Temporary disable bulk zeroing reduction with G1. See CR 6627983. |
| if (UseG1GC) { |
| FLAG_SET_DEFAULT(ReduceBulkZeroing, false); |
| } |
| #endif |
| |
| if (!check_vm_args_consistency()) { |
| return JNI_ERR; |
| } |
| |
| return JNI_OK; |
| } |
| |
| jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { |
| return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, |
| scp_assembly_required_p); |
| } |
| |
| jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { |
| return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, |
| scp_assembly_required_p); |
| } |
| |
| jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { |
| const int N_MAX_OPTIONS = 64; |
| const int OPTION_BUFFER_SIZE = 1024; |
| char buffer[OPTION_BUFFER_SIZE]; |
| |
| // The variable will be ignored if it exceeds the length of the buffer. |
| // Don't check this variable if user has special privileges |
| // (e.g. unix su command). |
| if (os::getenv(name, buffer, sizeof(buffer)) && |
| !os::have_special_privileges()) { |
| JavaVMOption options[N_MAX_OPTIONS]; // Construct option array |
| jio_fprintf(defaultStream::error_stream(), |
| "Picked up %s: %s\n", name, buffer); |
| char* rd = buffer; // pointer to the input string (rd) |
| int i; |
| for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string |
| while (isspace(*rd)) rd++; // skip whitespace |
| if (*rd == 0) break; // we re done when the input string is read completely |
| |
| // The output, option string, overwrites the input string. |
| // Because of quoting, the pointer to the option string (wrt) may lag the pointer to |
| // input string (rd). |
| char* wrt = rd; |
| |
| options[i++].optionString = wrt; // Fill in option |
| while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL |
| if (*rd == '\'' || *rd == '"') { // handle a quoted string |
| int quote = *rd; // matching quote to look for |
| rd++; // don't copy open quote |
| while (*rd != quote) { // include everything (even spaces) up until quote |
| if (*rd == 0) { // string termination means unmatched string |
| jio_fprintf(defaultStream::error_stream(), |
| "Unmatched quote in %s\n", name); |
| return JNI_ERR; |
| } |
| *wrt++ = *rd++; // copy to option string |
| } |
| rd++; // don't copy close quote |
| } else { |
| *wrt++ = *rd++; // copy to option string |
| } |
| } |
| // Need to check if we're done before writing a NULL, |
| // because the write could be to the byte that rd is pointing to. |
| if (*rd++ == 0) { |
| *wrt = 0; |
| break; |
| } |
| *wrt = 0; // Zero terminate option |
| } |
| // Construct JavaVMInitArgs structure and parse as if it was part of the command line |
| JavaVMInitArgs vm_args; |
| vm_args.version = JNI_VERSION_1_2; |
| vm_args.options = options; |
| vm_args.nOptions = i; |
| vm_args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; |
| |
| if (PrintVMOptions) { |
| const char* tail; |
| for (int i = 0; i < vm_args.nOptions; i++) { |
| const JavaVMOption *option = vm_args.options + i; |
| if (match_option(option, "-XX:", &tail)) { |
| logOption(tail); |
| } |
| } |
| } |
| |
| return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, ENVIRON_VAR)); |
| } |
| return JNI_OK; |
| } |
| |
| // Parse entry point called from JNI_CreateJavaVM |
| |
| jint Arguments::parse(const JavaVMInitArgs* args) { |
| |
| // Sharing support |
| // Construct the path to the archive |
| char jvm_path[JVM_MAXPATHLEN]; |
| os::jvm_path(jvm_path, sizeof(jvm_path)); |
| #ifdef TIERED |
| if (strstr(jvm_path, "client") != NULL) { |
| force_client_mode = true; |
| } |
| #endif // TIERED |
| char *end = strrchr(jvm_path, *os::file_separator()); |
| if (end != NULL) *end = '\0'; |
| char *shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(jvm_path) + |
| strlen(os::file_separator()) + 20); |
| if (shared_archive_path == NULL) return JNI_ENOMEM; |
| strcpy(shared_archive_path, jvm_path); |
| strcat(shared_archive_path, os::file_separator()); |
| strcat(shared_archive_path, "classes"); |
| DEBUG_ONLY(strcat(shared_archive_path, "_g");) |
| strcat(shared_archive_path, ".jsa"); |
| SharedArchivePath = shared_archive_path; |
| |
| // Remaining part of option string |
| const char* tail; |
| |
| // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. |
| bool settings_file_specified = false; |
| const char* flags_file; |
| int index; |
| for (index = 0; index < args->nOptions; index++) { |
| const JavaVMOption *option = args->options + index; |
| if (match_option(option, "-XX:Flags=", &tail)) { |
| flags_file = tail; |
| settings_file_specified = true; |
| } |
| if (match_option(option, "-XX:+PrintVMOptions", &tail)) { |
| PrintVMOptions = true; |
| } |
| if (match_option(option, "-XX:-PrintVMOptions", &tail)) { |
| PrintVMOptions = false; |
| } |
| if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions", &tail)) { |
| IgnoreUnrecognizedVMOptions = true; |
| } |
| if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions", &tail)) { |
| IgnoreUnrecognizedVMOptions = false; |
| } |
| if (match_option(option, "-XX:+PrintFlagsInitial", &tail)) { |
| CommandLineFlags::printFlags(); |
| vm_exit(0); |
| } |
| } |
| |
| if (IgnoreUnrecognizedVMOptions) { |
| // uncast const to modify the flag args->ignoreUnrecognized |
| *(jboolean*)(&args->ignoreUnrecognized) = true; |
| } |
| |
| // Parse specified settings file |
| if (settings_file_specified) { |
| if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) { |
| return JNI_EINVAL; |
| } |
| } |
| |
| // Parse default .hotspotrc settings file |
| if (!settings_file_specified) { |
| if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { |
| return JNI_EINVAL; |
| } |
| } |
| |
| if (PrintVMOptions) { |
| for (index = 0; index < args->nOptions; index++) { |
| const JavaVMOption *option = args->options + index; |
| if (match_option(option, "-XX:", &tail)) { |
| logOption(tail); |
| } |
| } |
| } |
| |
| // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS |
| jint result = parse_vm_init_args(args); |
| if (result != JNI_OK) { |
| return result; |
| } |
| |
| #ifndef PRODUCT |
| if (TraceBytecodesAt != 0) { |
| TraceBytecodes = true; |
| } |
| if (CountCompiledCalls) { |
| if (UseCounterDecay) { |
| warning("UseCounterDecay disabled because CountCalls is set"); |
| UseCounterDecay = false; |
| } |
| } |
| #endif // PRODUCT |
| |
| if (EnableInvokeDynamic && !EnableMethodHandles) { |
| if (!FLAG_IS_DEFAULT(EnableMethodHandles)) { |
| warning("forcing EnableMethodHandles true because EnableInvokeDynamic is true"); |
| } |
| EnableMethodHandles = true; |
| } |
| if (EnableMethodHandles && !AnonymousClasses) { |
| if (!FLAG_IS_DEFAULT(AnonymousClasses)) { |
| warning("forcing AnonymousClasses true because EnableMethodHandles is true"); |
| } |
| AnonymousClasses = true; |
| } |
| if ((EnableMethodHandles || AnonymousClasses) && ScavengeRootsInCode == 0) { |
| if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { |
| warning("forcing ScavengeRootsInCode non-zero because EnableMethodHandles or AnonymousClasses is true"); |
| } |
| ScavengeRootsInCode = 1; |
| } |
| #ifdef COMPILER2 |
| if (EnableInvokeDynamic && DoEscapeAnalysis) { |
| // TODO: We need to find rules for invokedynamic and EA. For now, |
| // simply disable EA by default. |
| if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) { |
| DoEscapeAnalysis = false; |
| } |
| } |
| #endif |
| |
| if (PrintGCDetails) { |
| // Turn on -verbose:gc options as well |
| PrintGC = true; |
| } |
| |
| #if defined(_LP64) && defined(COMPILER1) |
| UseCompressedOops = false; |
| #endif |
| |
| // Set object alignment values. |
| set_object_alignment(); |
| |
| #ifdef SERIALGC |
| force_serial_gc(); |
| #endif // SERIALGC |
| #ifdef KERNEL |
| no_shared_spaces(); |
| #endif // KERNEL |
| |
| // Set flags based on ergonomics. |
| set_ergonomics_flags(); |
| |
| #ifdef _LP64 |
| // XXX JSR 292 currently does not support compressed oops. |
| if (EnableMethodHandles && UseCompressedOops) { |
| if (FLAG_IS_DEFAULT(UseCompressedOops) || FLAG_IS_ERGO(UseCompressedOops)) { |
| UseCompressedOops = false; |
| } |
| } |
| #endif // _LP64 |
| |
| // Check the GC selections again. |
| if (!check_gc_consistency()) { |
| return JNI_EINVAL; |
| } |
| |
| #ifndef KERNEL |
| if (UseConcMarkSweepGC) { |
| // Set flags for CMS and ParNew. Check UseConcMarkSweep first |
| // to ensure that when both UseConcMarkSweepGC and UseParNewGC |
| // are true, we don't call set_parnew_gc_flags() as well. |
| set_cms_and_parnew_gc_flags(); |
| } else { |
| // Set heap size based on available physical memory |
| set_heap_size(); |
| // Set per-collector flags |
| if (UseParallelGC || UseParallelOldGC) { |
| set_parallel_gc_flags(); |
| } else if (UseParNewGC) { |
| set_parnew_gc_flags(); |
| } else if (UseG1GC) { |
| set_g1_gc_flags(); |
| } |
| } |
| #endif // KERNEL |
| |
| #ifdef SERIALGC |
| assert(verify_serial_gc_flags(), "SerialGC unset"); |
| #endif // SERIALGC |
| |
| // Set bytecode rewriting flags |
| set_bytecode_flags(); |
| |
| // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled. |
| set_aggressive_opts_flags(); |
| |
| #ifdef CC_INTERP |
| // Clear flags not supported by the C++ interpreter |
| FLAG_SET_DEFAULT(ProfileInterpreter, false); |
| FLAG_SET_DEFAULT(UseBiasedLocking, false); |
| LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false)); |
| #endif // CC_INTERP |
| |
| #ifdef COMPILER2 |
| if (!UseBiasedLocking || EmitSync != 0) { |
| UseOptoBiasInlining = false; |
| } |
| #endif |
| |
| if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) { |
| warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output"); |
| DebugNonSafepoints = true; |
| } |
| |
| #ifndef PRODUCT |
| if (CompileTheWorld) { |
| // Force NmethodSweeper to sweep whole CodeCache each time. |
| if (FLAG_IS_DEFAULT(NmethodSweepFraction)) { |
| NmethodSweepFraction = 1; |
| } |
| } |
| #endif |
| |
| if (PrintCommandLineFlags) { |
| CommandLineFlags::printSetFlags(); |
| } |
| |
| if (PrintFlagsFinal) { |
| CommandLineFlags::printFlags(); |
| } |
| |
| 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, char* v) { |
| if (plist == NULL) |
| return; |
| |
| SystemProperty* new_p = new SystemProperty(k, v, true); |
| PropertyList_add(plist, new_p); |
| } |
| |
| // This add maintains unique property key in the list. |
| void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, 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_value(v); |
| } |
| return; |
| } |
| } |
| |
| PropertyList_add(plist, k, v); |
| } |
| |
| #ifdef KERNEL |
| char *Arguments::get_kernel_properties() { |
| // Find properties starting with kernel and append them to string |
| // We need to find out how long they are first because the URL's that they |
| // might point to could get long. |
| int length = 0; |
| SystemProperty* prop; |
| for (prop = _system_properties; prop != NULL; prop = prop->next()) { |
| if (strncmp(prop->key(), "kernel.", 7 ) == 0) { |
| length += (strlen(prop->key()) + strlen(prop->value()) + 5); // "-D =" |
| } |
| } |
| // Add one for null terminator. |
| char *props = AllocateHeap(length + 1, "get_kernel_properties"); |
| if (length != 0) { |
| int pos = 0; |
| for (prop = _system_properties; prop != NULL; prop = prop->next()) { |
| if (strncmp(prop->key(), "kernel.", 7 ) == 0) { |
| jio_snprintf(&props[pos], length-pos, |
| "-D%s=%s ", prop->key(), prop->value()); |
| pos = strlen(props); |
| } |
| } |
| } |
| // null terminate props in case of null |
| props[length] = '\0'; |
| return props; |
| } |
| #endif // KERNEL |
| |
| // 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 |
| } |