--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/runtime/arguments.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,2654 @@
+/*
+ * 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
+}