Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  *

  */

 #include "precompiled.hpp"

 #include "classfile/javaAssertions.hpp"

 #include "classfile/javaClasses.hpp"

 #include "classfile/systemDictionary.hpp"

 #include "classfile/vmSymbols.hpp"

 #include "memory/allocation.inline.hpp"

 #include "memory/oopFactory.hpp"

 #include "oops/oop.inline.hpp"

 #include "runtime/handles.inline.hpp"

 bool                            JavaAssertions::_userDefault = false;

 bool                            JavaAssertions::_sysDefault = false;

 JavaAssertions::OptionList*     JavaAssertions::_classes = 0;

 JavaAssertions::OptionList*     JavaAssertions::_packages = 0;

 JavaAssertions::OptionList::OptionList(const char* name, bool enabled,

   OptionList* next) {

   assert(name != 0, "need a name");

   _name = name;

   _enabled = enabled;

   _next = next;

 }

 int JavaAssertions::OptionList::count(OptionList* p) {

   int rc;

   for (rc = 0; p != 0; p = p->next(), ++rc) /* empty */;

   return rc;

 }

 void JavaAssertions::addOption(const char* name, bool enable) {

   assert(name != 0, "must have a name");

   // Copy the name.  The storage needs to exist for the the lifetime of the vm;

   // it is never freed, so will be leaked (along with other option strings -

   // e.g., bootclasspath) if a process creates/destroys multiple VMs.

   int len = (int)strlen(name);

   char *name_copy = NEW_C_HEAP_ARRAY(char, len + 1, mtClass);

   strcpy(name_copy, name);

   // Figure out which list the new item should go on.  Names that end in "..."

   // go on the package tree list.

   OptionList** head = &_classes;

   if (len >= 3 && strcmp(name_copy + len - 3, "...") == 0) {

     // Delete the "...".

     len -= 3;

     name_copy[len] = '\0';

     head = &_packages;

   }

   // Convert class/package names to internal format.  Will have to convert back

   // when copying to java in createJavaAssertionStatusDirectives, but that

   // should happen only once.  Alternative would require that

   // JVM_DesiredAssertionStatus pass the external_name() to

   // JavaAssertion::enabled(), but that is done once per loaded class.

   for (int i = 0; i < len; ++i) {

     if (name_copy[i] == '.') name_copy[i] = '/';

   }

   if (TraceJavaAssertions) {

     tty->print_cr("JavaAssertions: adding %s %s=%d",

       head == &_classes ? "class" : "package",

       name_copy[0] != '\0' ? name_copy : "'default'",

       enable);

   }

   // Prepend a new item to the list.  Items added later take precedence, so

   // prepending allows us to stop searching the list after the first match.

   *head = new OptionList(name_copy, enable, *head);

 }

 oop JavaAssertions::createAssertionStatusDirectives(TRAPS) {

   Symbol* asd_sym = vmSymbols::java_lang_AssertionStatusDirectives();

   Klass* k = SystemDictionary::resolve_or_fail(asd_sym, true, CHECK_NULL);

   instanceKlassHandle asd_klass (THREAD, k);

   asd_klass->initialize(CHECK_NULL);

   Handle h = asd_klass->allocate_instance_handle(CHECK_NULL);

   int len;

   typeArrayOop t;

   len = OptionList::count(_packages);

   objArrayOop pn = oopFactory::new_objArray(SystemDictionary::String_klass(), len, CHECK_NULL);

   objArrayHandle pkgNames (THREAD, pn);

   t = oopFactory::new_typeArray(T_BOOLEAN, len, CHECK_NULL);

   typeArrayHandle pkgEnabled(THREAD, t);

   fillJavaArrays(_packages, len, pkgNames, pkgEnabled, CHECK_NULL);

   len = OptionList::count(_classes);

   objArrayOop cn = oopFactory::new_objArray(SystemDictionary::String_klass(), len, CHECK_NULL);

   objArrayHandle classNames (THREAD, cn);

   t = oopFactory::new_typeArray(T_BOOLEAN, len, CHECK_NULL);

   typeArrayHandle classEnabled(THREAD, t);

   fillJavaArrays(_classes, len, classNames, classEnabled, CHECK_NULL);

   java_lang_AssertionStatusDirectives::set_packages(h(), pkgNames());

   java_lang_AssertionStatusDirectives::set_packageEnabled(h(), pkgEnabled());

   java_lang_AssertionStatusDirectives::set_classes(h(), classNames());

   java_lang_AssertionStatusDirectives::set_classEnabled(h(), classEnabled());

   java_lang_AssertionStatusDirectives::set_deflt(h(), userClassDefault());

   return h();

 }

 void JavaAssertions::fillJavaArrays(const OptionList* p, int len,

 objArrayHandle names, typeArrayHandle enabled, TRAPS) {

   // Fill in the parallel names and enabled (boolean) arrays.  Start at the end

   // of the array and work backwards, so the order of items in the arrays

   // matches the order on the command line (the list is in reverse order, since

   // it was created by prepending successive items from the command line).

   int index;

   for (index = len - 1; p != 0; p = p->next(), --index) {

     assert(index >= 0, "length does not match list");

     Handle s = java_lang_String::create_from_str(p->name(), CHECK);

     s = java_lang_String::char_converter(s, '/', '.', CHECK);

     names->obj_at_put(index, s());

     enabled->bool_at_put(index, p->enabled());

   }

   assert(index == -1, "length does not match list");

 }

 inline JavaAssertions::OptionList*

 JavaAssertions::match_class(const char* classname) {

   for (OptionList* p = _classes; p != 0; p = p->next()) {

     if (strcmp(p->name(), classname) == 0) {

       return p;

     }

   }

   return 0;

 }

 JavaAssertions::OptionList*

 JavaAssertions::match_package(const char* classname) {

   // Search the package list for any items that apply to classname.  Each

   // sub-package in classname is checked, from most-specific to least, until one

   // is found.

   if (_packages == 0) return 0;

   // Find the length of the "most-specific" package in classname.  If classname

   // does not include a package, length will be 0 which will match items for the

   // default package (from options "-ea:..."  or "-da:...").

   size_t len = strlen(classname);

   for (/* empty */; len > 0 && classname[len] != '/'; --len) /* empty */;

   do {

     assert(len == 0 || classname[len] == '/', "not a package name");

     for (OptionList* p = _packages; p != 0; p = p->next()) {

       if (strncmp(p->name(), classname, len) == 0 && p->name()[len] == '\0') {

         return p;

       }

     }

     // Find the length of the next package, taking care to avoid decrementing

     // past 0 (len is unsigned).

     while (len > 0 && classname[--len] != '/') /* empty */;

   } while (len > 0);

   return 0;

 }

 inline void JavaAssertions::trace(const char* name,

 const char* typefound, const char* namefound, bool enabled) {

   if (TraceJavaAssertions) {

     tty->print_cr("JavaAssertions:  search for %s found %s %s=%d",

       name, typefound, namefound[0] != '\0' ? namefound : "'default'", enabled);

   }

 }

 bool JavaAssertions::enabled(const char* classname, bool systemClass) {

   assert(classname != 0, "must have a classname");

   // This will be slow if the number of assertion options on the command line is

   // large--it traverses two lists, one of them multiple times.  Could use a

   // single n-ary tree instead of lists if someone ever notices.

   // First check options that apply to classes.  If we find a match we're done.

   OptionList* p;

   if (p = match_class(classname)) {

     trace(classname, "class", p->name(), p->enabled());

     return p->enabled();

   }

   // Now check packages, from most specific to least.

   if (p = match_package(classname)) {

     trace(classname, "package", p->name(), p->enabled());

     return p->enabled();

   }

   // No match.  Return the default status.

   bool result = systemClass ? systemClassDefault() : userClassDefault();

   trace(classname, systemClass ? "system" : "user", "default", result);

   return result;

 }