1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
* 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;
}
|
