duke@435: /*
coleenp@4037:  * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #include "precompiled.hpp"
stefank@2314: #include "classfile/javaAssertions.hpp"
stefank@2314: #include "classfile/javaClasses.hpp"
stefank@2314: #include "classfile/systemDictionary.hpp"
stefank@2314: #include "classfile/vmSymbols.hpp"
stefank@2314: #include "memory/allocation.inline.hpp"
stefank@2314: #include "memory/oopFactory.hpp"
stefank@2314: #include "oops/oop.inline.hpp"
stefank@2314: #include "runtime/handles.inline.hpp"
duke@435: 
duke@435: bool                            JavaAssertions::_userDefault = false;
duke@435: bool                            JavaAssertions::_sysDefault = false;
duke@435: JavaAssertions::OptionList*     JavaAssertions::_classes = 0;
duke@435: JavaAssertions::OptionList*     JavaAssertions::_packages = 0;
duke@435: 
duke@435: JavaAssertions::OptionList::OptionList(const char* name, bool enabled,
duke@435:   OptionList* next) {
duke@435:   assert(name != 0, "need a name");
duke@435:   _name = name;
duke@435:   _enabled = enabled;
duke@435:   _next = next;
duke@435: }
duke@435: 
duke@435: int JavaAssertions::OptionList::count(OptionList* p) {
duke@435:   int rc;
duke@435:   for (rc = 0; p != 0; p = p->next(), ++rc) /* empty */;
duke@435:   return rc;
duke@435: }
duke@435: 
duke@435: void JavaAssertions::addOption(const char* name, bool enable) {
duke@435:   assert(name != 0, "must have a name");
duke@435: 
duke@435:   // Copy the name.  The storage needs to exist for the the lifetime of the vm;
duke@435:   // it is never freed, so will be leaked (along with other option strings -
duke@435:   // e.g., bootclasspath) if a process creates/destroys multiple VMs.
duke@435:   int len = (int)strlen(name);
zgu@3900:   char *name_copy = NEW_C_HEAP_ARRAY(char, len + 1, mtClass);
duke@435:   strcpy(name_copy, name);
duke@435: 
duke@435:   // Figure out which list the new item should go on.  Names that end in "..."
duke@435:   // go on the package tree list.
duke@435:   OptionList** head = &_classes;
duke@435:   if (len >= 3 && strcmp(name_copy + len - 3, "...") == 0) {
duke@435:     // Delete the "...".
duke@435:     len -= 3;
duke@435:     name_copy[len] = '\0';
duke@435:     head = &_packages;
duke@435:   }
duke@435: 
duke@435:   // Convert class/package names to internal format.  Will have to convert back
duke@435:   // when copying to java in createJavaAssertionStatusDirectives, but that
duke@435:   // should happen only once.  Alternative would require that
duke@435:   // JVM_DesiredAssertionStatus pass the external_name() to
duke@435:   // JavaAssertion::enabled(), but that is done once per loaded class.
duke@435:   for (int i = 0; i < len; ++i) {
duke@435:     if (name_copy[i] == '.') name_copy[i] = '/';
duke@435:   }
duke@435: 
duke@435:   if (TraceJavaAssertions) {
duke@435:     tty->print_cr("JavaAssertions: adding %s %s=%d",
duke@435:       head == &_classes ? "class" : "package",
duke@435:       name_copy[0] != '\0' ? name_copy : "'default'",
duke@435:       enable);
duke@435:   }
duke@435: 
duke@435:   // Prepend a new item to the list.  Items added later take precedence, so
duke@435:   // prepending allows us to stop searching the list after the first match.
duke@435:   *head = new OptionList(name_copy, enable, *head);
duke@435: }
duke@435: 
duke@435: oop JavaAssertions::createAssertionStatusDirectives(TRAPS) {
coleenp@2497:   Symbol* asd_sym = vmSymbols::java_lang_AssertionStatusDirectives();
coleenp@4037:   Klass* k = SystemDictionary::resolve_or_fail(asd_sym, true, CHECK_NULL);
duke@435:   instanceKlassHandle asd_klass (THREAD, k);
duke@435:   asd_klass->initialize(CHECK_NULL);
duke@435:   Handle h = asd_klass->allocate_instance_handle(CHECK_NULL);
duke@435: 
duke@435:   int len;
duke@435:   typeArrayOop t;
duke@435:   len = OptionList::count(_packages);
never@1577:   objArrayOop pn = oopFactory::new_objArray(SystemDictionary::String_klass(), len, CHECK_NULL);
duke@435:   objArrayHandle pkgNames (THREAD, pn);
duke@435:   t = oopFactory::new_typeArray(T_BOOLEAN, len, CHECK_NULL);
duke@435:   typeArrayHandle pkgEnabled(THREAD, t);
duke@435:   fillJavaArrays(_packages, len, pkgNames, pkgEnabled, CHECK_NULL);
duke@435: 
duke@435:   len = OptionList::count(_classes);
never@1577:   objArrayOop cn = oopFactory::new_objArray(SystemDictionary::String_klass(), len, CHECK_NULL);
duke@435:   objArrayHandle classNames (THREAD, cn);
duke@435:   t = oopFactory::new_typeArray(T_BOOLEAN, len, CHECK_NULL);
duke@435:   typeArrayHandle classEnabled(THREAD, t);
duke@435:   fillJavaArrays(_classes, len, classNames, classEnabled, CHECK_NULL);
duke@435: 
duke@435:   java_lang_AssertionStatusDirectives::set_packages(h(), pkgNames());
duke@435:   java_lang_AssertionStatusDirectives::set_packageEnabled(h(), pkgEnabled());
duke@435:   java_lang_AssertionStatusDirectives::set_classes(h(), classNames());
duke@435:   java_lang_AssertionStatusDirectives::set_classEnabled(h(), classEnabled());
duke@435:   java_lang_AssertionStatusDirectives::set_deflt(h(), userClassDefault());
duke@435:   return h();
duke@435: }
duke@435: 
duke@435: void JavaAssertions::fillJavaArrays(const OptionList* p, int len,
duke@435: objArrayHandle names, typeArrayHandle enabled, TRAPS) {
duke@435:   // Fill in the parallel names and enabled (boolean) arrays.  Start at the end
duke@435:   // of the array and work backwards, so the order of items in the arrays
duke@435:   // matches the order on the command line (the list is in reverse order, since
duke@435:   // it was created by prepending successive items from the command line).
duke@435:   int index;
duke@435:   for (index = len - 1; p != 0; p = p->next(), --index) {
duke@435:     assert(index >= 0, "length does not match list");
duke@435:     Handle s = java_lang_String::create_from_str(p->name(), CHECK);
duke@435:     s = java_lang_String::char_converter(s, '/', '.', CHECK);
duke@435:     names->obj_at_put(index, s());
duke@435:     enabled->bool_at_put(index, p->enabled());
duke@435:   }
duke@435:   assert(index == -1, "length does not match list");
duke@435: }
duke@435: 
duke@435: inline JavaAssertions::OptionList*
duke@435: JavaAssertions::match_class(const char* classname) {
duke@435:   for (OptionList* p = _classes; p != 0; p = p->next()) {
duke@435:     if (strcmp(p->name(), classname) == 0) {
duke@435:       return p;
duke@435:     }
duke@435:   }
duke@435:   return 0;
duke@435: }
duke@435: 
duke@435: JavaAssertions::OptionList*
duke@435: JavaAssertions::match_package(const char* classname) {
duke@435:   // Search the package list for any items that apply to classname.  Each
duke@435:   // sub-package in classname is checked, from most-specific to least, until one
duke@435:   // is found.
duke@435:   if (_packages == 0) return 0;
duke@435: 
duke@435:   // Find the length of the "most-specific" package in classname.  If classname
duke@435:   // does not include a package, length will be 0 which will match items for the
duke@435:   // default package (from options "-ea:..."  or "-da:...").
duke@435:   size_t len = strlen(classname);
duke@435:   for (/* empty */; len > 0 && classname[len] != '/'; --len) /* empty */;
duke@435: 
duke@435:   do {
duke@435:     assert(len == 0 || classname[len] == '/', "not a package name");
duke@435:     for (OptionList* p = _packages; p != 0; p = p->next()) {
duke@435:       if (strncmp(p->name(), classname, len) == 0 && p->name()[len] == '\0') {
duke@435:         return p;
duke@435:       }
duke@435:     }
duke@435: 
duke@435:     // Find the length of the next package, taking care to avoid decrementing
duke@435:     // past 0 (len is unsigned).
duke@435:     while (len > 0 && classname[--len] != '/') /* empty */;
duke@435:   } while (len > 0);
duke@435: 
duke@435:   return 0;
duke@435: }
duke@435: 
duke@435: inline void JavaAssertions::trace(const char* name,
duke@435: const char* typefound, const char* namefound, bool enabled) {
duke@435:   if (TraceJavaAssertions) {
duke@435:     tty->print_cr("JavaAssertions:  search for %s found %s %s=%d",
duke@435:       name, typefound, namefound[0] != '\0' ? namefound : "'default'", enabled);
duke@435:   }
duke@435: }
duke@435: 
duke@435: bool JavaAssertions::enabled(const char* classname, bool systemClass) {
duke@435:   assert(classname != 0, "must have a classname");
duke@435: 
duke@435:   // This will be slow if the number of assertion options on the command line is
duke@435:   // large--it traverses two lists, one of them multiple times.  Could use a
duke@435:   // single n-ary tree instead of lists if someone ever notices.
duke@435: 
duke@435:   // First check options that apply to classes.  If we find a match we're done.
duke@435:   OptionList* p;
duke@435:   if (p = match_class(classname)) {
duke@435:     trace(classname, "class", p->name(), p->enabled());
duke@435:     return p->enabled();
duke@435:   }
duke@435: 
duke@435:   // Now check packages, from most specific to least.
duke@435:   if (p = match_package(classname)) {
duke@435:     trace(classname, "package", p->name(), p->enabled());
duke@435:     return p->enabled();
duke@435:   }
duke@435: 
duke@435:   // No match.  Return the default status.
duke@435:   bool result = systemClass ? systemClassDefault() : userClassDefault();
duke@435:   trace(classname, systemClass ? "system" : "user", "default", result);
duke@435:   return result;
duke@435: }