truffle: src/share/vm/runtime/arguments.cpp comparison

comparison src/share/vm/runtime/arguments.cpp @ 0:a61af66fc99e jdk7-b24

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author	duke
date	Sat, 01 Dec 2007 00:00:00 +0000
parents
children	28372612af5e ff5961f4c095 5a76ab815e34

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--1:000000000000
+:a61af66fc99e
+/*
+* Copyright 1997-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+* CA 95054 USA or visit www.sun.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::_initial_heap_size            = 0;
+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();
+}
+// String containing commands that will be ignored and cause a
+// warning to be issued.  These commands should be accepted
+// for 1.6 but not 1.7.  The string should be cleared at the
+// beginning of 1.7.
+static const char*  obsolete_jvm_flags_1_5_0[] = {
+"UseTrainGC",
+"UseSpecialLargeObjectHandling",
+"UseOversizedCarHandling",
+"TraceCarAllocation",
+"PrintTrainGCProcessingStats",
+"LogOfCarSpaceSize",
+"OversizedCarThreshold",
+"MinTickInterval",
+"DefaultTickInterval",
+"MaxTickInterval",
+"DelayTickAdjustment",
+"ProcessingToTenuringRatio",
+"MinTrainLength",
+0};
+bool Arguments::made_obsolete_in_1_5_0(const char *s) {
+int i = 0;
+while (obsolete_jvm_flags_1_5_0[i] != NULL) {
+// <flag>=xxx form
+// [-|+]<flag> form
+if ((strncmp(obsolete_jvm_flags_1_5_0[i], s,
+strlen(obsolete_jvm_flags_1_5_0[i])) == 0) ||
+((s[0] == '+' || s[0] == '-') &&
+(strncmp(obsolete_jvm_flags_1_5_0[i], &s[1],
+strlen(obsolete_jvm_flags_1_5_0[i])) == 0))) {
+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(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(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 atomll(const char *s, jlong* result) {
+jlong n = 0;
+int args_read = sscanf(s, os::jlong_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;
+return true;
+case 'G': case 'g':
+*result = n * G;
+return true;
+case 'M': case 'm':
+*result = n * M;
+return true;
+case 'K': case 'k':
+*result = n * K;
+return true;
+case '\0':
+*result = n;
+return true;
+default:
+return false;
+}
+}
+Arguments::ArgsRange Arguments::check_memory_size(jlong size, jlong 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 ((julong) 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) {
+jlong v;
+intx intx_v;
+bool is_neg = false;
+// Check the sign first since atomll() parses only unsigned values.
+if (*value == '-') {
+if (!CommandLineFlags::intxAt(name, &intx_v)) {
+return false;
+}
+value++;
+is_neg = true;
+}
+if (!atomll(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;
+}
+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) {
+if (parse_argument(arg, origin)) {
+// do nothing
+} else if (made_obsolete_in_1_5_0(arg)) {
+jio_fprintf(defaultStream::error_stream(),
+"Warning: The flag %s has been EOL'd as of 1.5.0 and will"
+" be ignored\n", arg);
+} 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;
+}
+// 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());
+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);
+}
+}
+// 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 && !UseParallelGC, "control point invariant");
+if (FLAG_IS_DEFAULT(UseParNewGC) && ParallelGCThreads > 1) {
+FLAG_SET_DEFAULT(UseParNewGC, true);
+} else if (UseParNewGC && ParallelGCThreads == 0) {
+FLAG_SET_DEFAULT(ParallelGCThreads, nof_parallel_gc_threads());
+if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) {
+FLAG_SET_DEFAULT(UseParNewGC, false);
+}
+}
+if (!UseParNewGC) {
+FLAG_SET_DEFAULT(ParallelGCThreads, 0);
+} else {
+no_shared_spaces();
+// By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 correspondinly,
+// 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 to promote all at first collection.
+// See CR 6362902.
+if (AlwaysTenure) {
+FLAG_SET_CMDLINE(intx, MaxTenuringThreshold, 0);
+}
+}
+}
+// CAUTION: this code is currently shared by UseParallelGC, UseParNewGC and
+// UseconcMarkSweepGC. Further tuning of individual collectors might
+// dictate refinement on a per-collector basis.
+int Arguments::nof_parallel_gc_threads() {
+if (FLAG_IS_DEFAULT(ParallelGCThreads)) {
+// For very large machines, there are diminishing returns
+// for large numbers of worker threads.  Instead of
+// hogging the whole system, use 5/8ths of a worker for every
+// processor after the first 8.  For example, on a 72 cpu
+// machine use 8 + (72 - 8) * (5/8) == 48 worker threads.
+// This is just a start and needs further tuning and study in
+// Tiger.
+int ncpus = os::active_processor_count();
+return (ncpus <= 8) ? ncpus : 3 + ((ncpus * 5) / 8);
+} else {
+return ParallelGCThreads;
+}
+}
+// 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() {
+if (UseSerialGC || UseParallelGC) {
+return;
+}
+// If we are using CMS, we prefer to UseParNewGC,
+// unless explicitly forbidden.
+if (UseConcMarkSweepGC && !UseParNewGC && FLAG_IS_DEFAULT(UseParNewGC)) {
+FLAG_SET_DEFAULT(UseParNewGC, true);
+}
+// Turn off AdaptiveSizePolicy by default for cms until it is
+// complete.  Also turn it off in general if the
+// parnew collector has been selected.
+if ((UseConcMarkSweepGC || UseParNewGC) &&
+FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) {
+FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false);
+}
+// In either case, adjust ParallelGCThreads and/or UseParNewGC
+// as needed.
+set_parnew_gc_flags();
+if (!UseConcMarkSweepGC) {
+return;
+}
+// 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_DEFAULT(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 (FLAG_IS_DEFAULT(MaxNewSize)) {  // MaxNewSize not set at command-line
+if (!FLAG_IS_DEFAULT(NewSize)) {   // NewSize explicitly set at command-line
+FLAG_SET_DEFAULT(MaxNewSize, MAX2(NewSize, preferred_max_new_size));
+} else {
+FLAG_SET_DEFAULT(MaxNewSize, preferred_max_new_size);
+}
+}
+// 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 (FLAG_IS_DEFAULT(NewRatio)) {
+FLAG_SET_DEFAULT(NewRatio, MAX2(NewRatio, new_ratio));
+size_t min_new  = align_size_up(ScaleForWordSize(min_new_default), os::vm_page_size());
+size_t prev_initial_size = initial_heap_size();
+if (prev_initial_size != 0 && prev_initial_size < min_new+OldSize) {
+set_initial_heap_size(min_new+OldSize);
+// Currently minimum size and the initial heap sizes are the same.
+set_min_heap_size(initial_heap_size());
+if (PrintGCDetails && Verbose) {
+warning("Initial heap size increased to " SIZE_FORMAT " M from "
+SIZE_FORMAT " M; use -XX:NewSize=... for finer control.",
+initial_heap_size()/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 (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_DEFAULT(NewSize, MAX2(NewSize, min_new));
+FLAG_SET_DEFAULT(NewSize, MIN2(preferred_max_new_size, 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_DEFAULT(OldSize, MIN2(3*NewSize,  max_heap - NewSize));
+}
+}
+}
+}
+// Unless explicitly requested otherwise, definitely
+// promote all objects surviving "tenuring_default" scavenges.
+if (FLAG_IS_DEFAULT(MaxTenuringThreshold) &&
+FLAG_IS_DEFAULT(SurvivorRatio)) {
+FLAG_SET_DEFAULT(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_DEFAULT(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)) {
+FLAG_SET_CMDLINE(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");
+}
+}
+}
+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 ergonmics 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 &&
+!UseParNewGC &&
+!DumpSharedSpaces &&
+FLAG_IS_DEFAULT(UseParallelGC)) {
+if (should_auto_select_low_pause_collector()) {
+FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true);
+set_cms_and_parnew_gc_flags();
+} else {
+FLAG_SET_ERGO(bool, UseParallelGC, true);
+}
+no_shared_spaces();
+}
+// This is here because the parallel collector could
+// have been selected so this initialization should
+// still be done.
+set_parallel_gc_flags();
+}
+}
+void Arguments::set_parallel_gc_flags() {
+// 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) {
+if (FLAG_IS_DEFAULT(MaxHeapSize)) {
+const uint64_t reasonable_fraction =
+os::physical_memory() / DefaultMaxRAMFraction;
+const uint64_t maximum_size = (uint64_t) DefaultMaxRAM;
+size_t reasonable_max =
+(size_t) os::allocatable_physical_memory(reasonable_fraction);
+if (reasonable_max > maximum_size) {
+reasonable_max = maximum_size;
+}
+if (PrintGCDetails && Verbose) {
+// Cannot use gclog_or_tty yet.
+tty->print_cr("  Max heap size for server class platform "
+SIZE_FORMAT, reasonable_max);
+}
+// If the initial_heap_size has not been set with -Xms,
+// then set it as fraction of size of physical memory
+// respecting the maximum and minimum sizes of the heap.
+if (initial_heap_size() == 0) {
+const uint64_t reasonable_initial_fraction =
+os::physical_memory() / DefaultInitialRAMFraction;
+const size_t reasonable_initial =
+(size_t) os::allocatable_physical_memory(reasonable_initial_fraction);
+const size_t minimum_size = NewSize + OldSize;
+set_initial_heap_size(MAX2(MIN2(reasonable_initial, reasonable_max),
+minimum_size));
+// Currently the minimum size and the initial heap sizes are the same.
+set_min_heap_size(initial_heap_size());
+if (PrintGCDetails && Verbose) {
+// Cannot use gclog_or_tty yet.
+tty->print_cr("  Initial heap size for server class platform "
+SIZE_FORMAT, initial_heap_size());
+}
+} else {
+// An minimum size was specified on the command line.  Be sure
+// that the maximum size is consistent.
+if (initial_heap_size() > reasonable_max) {
+reasonable_max = initial_heap_size();
+}
+}
+FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx) reasonable_max);
+}
+// 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.
+if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) {
+MarkSweepDeadRatio = 1;
+}
+if (FLAG_IS_DEFAULT(PermMarkSweepDeadRatio)) {
+PermMarkSweepDeadRatio = 5;
+}
+}
+}
+}
+// 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() {
+if (AggressiveOpts) {
+NOT_WINDOWS(
+// No measured benefit on Windows
+if (FLAG_IS_DEFAULT(CacheTimeMillis)) {
+FLAG_SET_DEFAULT(CacheTimeMillis, 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_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 set_serial_gc_flags() {
+FLAG_SET_DEFAULT(UseSerialGC, true);
+FLAG_SET_DEFAULT(UseParNewGC, false);
+FLAG_SET_DEFAULT(UseConcMarkSweepGC, false);
+FLAG_SET_DEFAULT(UseParallelGC, false);
+FLAG_SET_DEFAULT(UseParallelOldGC, false);
+}
+static bool verify_serial_gc_flags() {
+return (UseSerialGC &&
+!(UseParNewGC || UseConcMarkSweepGC || UseParallelGC ||
+UseParallelOldGC));
+}
+// 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 &= verify_percentage(MaxLiveObjectEvacuationRatio,
+"MaxLiveObjectEvacuationRatio");
+status &= verify_percentage(AdaptiveSizePolicyWeight,
+"AdaptiveSizePolicyWeight");
+status &= verify_percentage(AdaptivePermSizeWeight, "AdaptivePermSizeWeight");
+status &= verify_percentage(ThresholdTolerance, "ThresholdTolerance");
+status &= verify_percentage(MinHeapFreeRatio, "MinHeapFreeRatio");
+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.
+}
+status &= verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit");
+status &= verify_percentage(GCTimeLimit, "GCTimeLimit");
+if (GCTimeLimit == 100) {
+// Turn off gc-overhead-limit-exceeded checks
+FLAG_SET_DEFAULT(UseGCOverheadLimit, false);
+}
+status &= verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit");
+// Check user specified sharing option conflict with Parallel GC
+bool cannot_share = (UseConcMarkSweepGC || UseParallelGC ||
+UseParallelOldGC || UseParNewGC ||
+SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages));
+if (cannot_share) {
+// Either force sharing on by forcing the other options off, or
+// force sharing off.
+if (DumpSharedSpaces || ForceSharedSpaces) {
+set_serial_gc_flags();
+FLAG_SET_DEFAULT(SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages), false);
+} else {
+no_shared_spaces();
+}
+}
+// 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 (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;
+}
+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 if (!UseTLAB) {
+jio_fprintf(defaultStream::error_stream(),
+"error:  CMSIncrementalMode requires thread-local "
+"allocation buffers\n(-XX:+UseTLAB).\n");
+status = false;
+} else {
+status &= verify_percentage(CMSIncrementalDutyCycle,
+"CMSIncrementalDutyCycle");
+status &= verify_percentage(CMSIncrementalDutyCycleMin,
+"CMSIncrementalDutyCycleMin");
+status &= verify_percentage(CMSIncrementalSafetyFactor,
+"CMSIncrementalSafetyFactor");
+status &= verify_percentage(CMSIncrementalOffset,
+"CMSIncrementalOffset");
+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);
+}
+}
+}
+if (UseNUMA && !UseTLAB) {
+jio_fprintf(defaultStream::error_stream(),
+"error:  NUMA allocator (-XX:+UseNUMA) requires thread-local "
+"allocation\nbuffers (-XX:+UseTLAB).\n");
+status = false;
+}
+// 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;
+}
+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;
+}
+Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
+jlong* long_arg,
+jlong min_size) {
+if (!atomll(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;
+}
+// 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);
+FLAG_SET_CMDLINE(bool, TraceClassUnloading, 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)) {
+jlong 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, (size_t) long_initial_eden_size);
+FLAG_SET_CMDLINE(uintx, NewSize, (size_t) long_initial_eden_size);
+// -Xms
+} else if (match_option(option, "-Xms", &tail)) {
+jlong 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;
+}
+set_initial_heap_size((size_t) long_initial_heap_size);
+// Currently the minimum size and the initial heap sizes are the same.
+set_min_heap_size(initial_heap_size());
+// -Xmx
+} else if (match_option(option, "-Xmx", &tail)) {
+jlong 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, (size_t) 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)) {
+jlong 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)) {
+jlong long_ReservedCodeCacheSize = 0;
+ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize,
+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);
+set_initial_heap_size(MaxHeapSize);
+// Currently the minimum size and the initial heap sizes are the same.
+set_min_heap_size(initial_heap_size());
+}
+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, nof_parallel_gc_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)) {
+jlong 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
+} else
+#ifdef ASSERT
+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);
+} else
+#endif
+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:CMSParPromoteBlocksToClaim in place of "
+"-XX:ParCMSPromoteBlocksToClaim in the future\n");
+} else
+if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) {
+jlong 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, (julong)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)) {
+jlong 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, (julong)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:", &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;
+}
+}
+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));
+}
+#else
+if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
+FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
+}
+#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 = false;
+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;
+int index;
+for (index = 0; index < args->nOptions; index++) {
+const JavaVMOption *option = args->options + index;
+if (match_option(option, "-XX:Flags=", &tail)) {
+if (!process_settings_file(tail, true, args->ignoreUnrecognized)) {
+return JNI_EINVAL;
+}
+settings_file_specified = true;
+}
+if (match_option(option, "-XX:+PrintVMOptions", &tail)) {
+PrintVMOptions = true;
+}
+}
+// 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 (PrintGCDetails) {
+// Turn on -verbose:gc options as well
+PrintGC = true;
+if (FLAG_IS_DEFAULT(TraceClassUnloading)) {
+TraceClassUnloading = true;
+}
+}
+#ifdef SERIALGC
+set_serial_gc_flags();
+#endif // SERIALGC
+#ifdef KERNEL
+no_shared_spaces();
+#endif // KERNEL
+// Set some flags for ParallelGC if needed.
+set_parallel_gc_flags();
+// Set some flags for CMS and/or ParNew collectors, as needed.
+set_cms_and_parnew_gc_flags();
+// Set flags based on ergonomics.
+set_ergonomics_flags();
+#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
+// Biased locking is not implemented with c++ interpreter
+FLAG_SET_DEFAULT(UseBiasedLocking, false);
+#endif /* CC_INTERP */
+if (PrintCommandLineFlags) {
+CommandLineFlags::printSetFlags();
+}
+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) {
+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) {
+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
+}

Mercurial > hg > truffle

comparison src/share/vm/runtime/arguments.cpp @ 0:a61af66fc99e jdk7-b24