1 /* 2 * Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "incls/_precompiled.incl" 26 #include "incls/_javaAssertions.cpp.incl" 27 28 bool JavaAssertions::_userDefault = false; 29 bool JavaAssertions::_sysDefault = false; 30 JavaAssertions::OptionList* JavaAssertions::_classes = 0; 31 JavaAssertions::OptionList* JavaAssertions::_packages = 0; 32 33 JavaAssertions::OptionList::OptionList(const char* name, bool enabled, 34 OptionList* next) { 35 assert(name != 0, "need a name"); 36 _name = name; 37 _enabled = enabled; 38 _next = next; 39 } 40 41 int JavaAssertions::OptionList::count(OptionList* p) { 42 int rc; 43 for (rc = 0; p != 0; p = p->next(), ++rc) /* empty */; 44 return rc; 45 } 46 47 void JavaAssertions::addOption(const char* name, bool enable) { 48 assert(name != 0, "must have a name"); 49 50 // Copy the name. The storage needs to exist for the the lifetime of the vm; 51 // it is never freed, so will be leaked (along with other option strings - 52 // e.g., bootclasspath) if a process creates/destroys multiple VMs. 53 int len = (int)strlen(name); 54 char *name_copy = NEW_C_HEAP_ARRAY(char, len + 1); 55 strcpy(name_copy, name); 56 57 // Figure out which list the new item should go on. Names that end in "..." 58 // go on the package tree list. 59 OptionList** head = &_classes; 60 if (len >= 3 && strcmp(name_copy + len - 3, "...") == 0) { 61 // Delete the "...". 62 len -= 3; 63 name_copy[len] = '\0'; 64 head = &_packages; 65 } 66 67 // Convert class/package names to internal format. Will have to convert back 68 // when copying to java in createJavaAssertionStatusDirectives, but that 69 // should happen only once. Alternative would require that 70 // JVM_DesiredAssertionStatus pass the external_name() to 71 // JavaAssertion::enabled(), but that is done once per loaded class. 72 for (int i = 0; i < len; ++i) { 73 if (name_copy[i] == '.') name_copy[i] = '/'; 74 } 75 76 if (TraceJavaAssertions) { 77 tty->print_cr("JavaAssertions: adding %s %s=%d", 78 head == &_classes ? "class" : "package", 79 name_copy[0] != '\0' ? name_copy : "'default'", 80 enable); 81 } 82 83 // Prepend a new item to the list. Items added later take precedence, so 84 // prepending allows us to stop searching the list after the first match. 85 *head = new OptionList(name_copy, enable, *head); 86 } 87 88 oop JavaAssertions::createAssertionStatusDirectives(TRAPS) { 89 symbolHandle asd_sym = vmSymbolHandles::java_lang_AssertionStatusDirectives(); 90 klassOop k = SystemDictionary::resolve_or_fail(asd_sym, true, CHECK_NULL); 91 instanceKlassHandle asd_klass (THREAD, k); 92 asd_klass->initialize(CHECK_NULL); 93 Handle h = asd_klass->allocate_instance_handle(CHECK_NULL); 94 95 int len; 96 typeArrayOop t; 97 len = OptionList::count(_packages); 98 objArrayOop pn = oopFactory::new_objArray(SystemDictionary::String_klass(), len, CHECK_NULL); 99 objArrayHandle pkgNames (THREAD, pn); 100 t = oopFactory::new_typeArray(T_BOOLEAN, len, CHECK_NULL); 101 typeArrayHandle pkgEnabled(THREAD, t); 102 fillJavaArrays(_packages, len, pkgNames, pkgEnabled, CHECK_NULL); 103 104 len = OptionList::count(_classes); 105 objArrayOop cn = oopFactory::new_objArray(SystemDictionary::String_klass(), len, CHECK_NULL); 106 objArrayHandle classNames (THREAD, cn); 107 t = oopFactory::new_typeArray(T_BOOLEAN, len, CHECK_NULL); 108 typeArrayHandle classEnabled(THREAD, t); 109 fillJavaArrays(_classes, len, classNames, classEnabled, CHECK_NULL); 110 111 java_lang_AssertionStatusDirectives::set_packages(h(), pkgNames()); 112 java_lang_AssertionStatusDirectives::set_packageEnabled(h(), pkgEnabled()); 113 java_lang_AssertionStatusDirectives::set_classes(h(), classNames()); 114 java_lang_AssertionStatusDirectives::set_classEnabled(h(), classEnabled()); 115 java_lang_AssertionStatusDirectives::set_deflt(h(), userClassDefault()); 116 return h(); 117 } 118 119 void JavaAssertions::fillJavaArrays(const OptionList* p, int len, 120 objArrayHandle names, typeArrayHandle enabled, TRAPS) { 121 // Fill in the parallel names and enabled (boolean) arrays. Start at the end 122 // of the array and work backwards, so the order of items in the arrays 123 // matches the order on the command line (the list is in reverse order, since 124 // it was created by prepending successive items from the command line). 125 int index; 126 for (index = len - 1; p != 0; p = p->next(), --index) { 127 assert(index >= 0, "length does not match list"); 128 Handle s = java_lang_String::create_from_str(p->name(), CHECK); 129 s = java_lang_String::char_converter(s, '/', '.', CHECK); 130 names->obj_at_put(index, s()); 131 enabled->bool_at_put(index, p->enabled()); 132 } 133 assert(index == -1, "length does not match list"); 134 } 135 136 inline JavaAssertions::OptionList* 137 JavaAssertions::match_class(const char* classname) { 138 for (OptionList* p = _classes; p != 0; p = p->next()) { 139 if (strcmp(p->name(), classname) == 0) { 140 return p; 141 } 142 } 143 return 0; 144 } 145 146 JavaAssertions::OptionList* 147 JavaAssertions::match_package(const char* classname) { 148 // Search the package list for any items that apply to classname. Each 149 // sub-package in classname is checked, from most-specific to least, until one 150 // is found. 151 if (_packages == 0) return 0; 152 153 // Find the length of the "most-specific" package in classname. If classname 154 // does not include a package, length will be 0 which will match items for the 155 // default package (from options "-ea:..." or "-da:..."). 156 size_t len = strlen(classname); 157 for (/* empty */; len > 0 && classname[len] != '/'; --len) /* empty */; 158 159 do { 160 assert(len == 0 || classname[len] == '/', "not a package name"); 161 for (OptionList* p = _packages; p != 0; p = p->next()) { 162 if (strncmp(p->name(), classname, len) == 0 && p->name()[len] == '\0') { 163 return p; 164 } 165 } 166 167 // Find the length of the next package, taking care to avoid decrementing 168 // past 0 (len is unsigned). 169 while (len > 0 && classname[--len] != '/') /* empty */; 170 } while (len > 0); 171 172 return 0; 173 } 174 175 inline void JavaAssertions::trace(const char* name, 176 const char* typefound, const char* namefound, bool enabled) { 177 if (TraceJavaAssertions) { 178 tty->print_cr("JavaAssertions: search for %s found %s %s=%d", 179 name, typefound, namefound[0] != '\0' ? namefound : "'default'", enabled); 180 } 181 } 182 183 bool JavaAssertions::enabled(const char* classname, bool systemClass) { 184 assert(classname != 0, "must have a classname"); 185 186 // This will be slow if the number of assertion options on the command line is 187 // large--it traverses two lists, one of them multiple times. Could use a 188 // single n-ary tree instead of lists if someone ever notices. 189 190 // First check options that apply to classes. If we find a match we're done. 191 OptionList* p; 192 if (p = match_class(classname)) { 193 trace(classname, "class", p->name(), p->enabled()); 194 return p->enabled(); 195 } 196 197 // Now check packages, from most specific to least. 198 if (p = match_package(classname)) { 199 trace(classname, "package", p->name(), p->enabled()); 200 return p->enabled(); 201 } 202 203 // No match. Return the default status. 204 bool result = systemClass ? systemClassDefault() : userClassDefault(); 205 trace(classname, systemClass ? "system" : "user", "default", result); 206 return result; 207 }