Mercurial > hg > graal-compiler
view src/share/vm/classfile/javaAssertions.cpp @ 5129:51111665eda6
Support for recording a leaf graph id for each deoptimization point in the debug info.
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Wed, 21 Mar 2012 10:47:02 +0100 |
parents | 1d1603768966 |
children | d2a62e0f25eb |
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/* * Copyright (c) 2000, 2011, 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); 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(); klassOop 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; }