12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package java.lang;
26
27 import jdk.internal.misc.JavaLangInvokeAccess;
28 import jdk.internal.misc.SharedSecrets;
29
30 import static java.lang.StackWalker.Option.*;
31 import java.lang.StackWalker.StackFrame;
32 import java.lang.reflect.Module;
33 import java.util.Optional;
34 import java.util.OptionalInt;
35
36 class StackFrameInfo implements StackFrame {
37 private final static JavaLangInvokeAccess jlInvokeAccess =
38 SharedSecrets.getJavaLangInvokeAccess();
39
40 // Footprint improvement: MemberName::clazz can replace
41 // StackFrameInfo::declaringClass.
42
43 final StackWalker walker;
44 final Class<?> declaringClass;
45 final Object memberName;
46 final short bci;
47 private volatile StackTraceElement ste;
48
49 /*
50 * Create StackFrameInfo for StackFrameTraverser and LiveStackFrameTraverser
51 * to use
52 */
53 StackFrameInfo(StackWalker walker) {
54 this.walker = walker;
55 this.declaringClass = null;
56 this.bci = -1;
57 this.memberName = jlInvokeAccess.newMemberName();
58 }
59
60 @Override
61 public String getClassName() {
62 return declaringClass.getName();
63 }
64
65 @Override
66 public Class<?> getDeclaringClass() {
67 walker.ensureAccessEnabled(RETAIN_CLASS_REFERENCE);
68 return declaringClass;
69 }
70
71 @Override
72 public String getMethodName() {
73 return jlInvokeAccess.getName(memberName);
74 }
75
76 @Override
77 public final Optional<String> getFileName() {
78 StackTraceElement ste = toStackTraceElement();
79 return ste.getFileName() != null ? Optional.of(ste.getFileName()) : Optional.empty();
80 }
81
82 @Override
83 public final OptionalInt getLineNumber() {
84 StackTraceElement ste = toStackTraceElement();
85 return ste.getLineNumber() > 0 ? OptionalInt.of(ste.getLineNumber()) : OptionalInt.empty();
86 }
87
88 @Override
89 public final boolean isNativeMethod() {
90 StackTraceElement ste = toStackTraceElement();
91 return ste.isNativeMethod();
92 }
93
94 @Override
95 public String toString() {
96 StackTraceElement ste = toStackTraceElement();
97 return ste.toString();
98 }
99
100 /**
101 * Fill in the fields of the given StackTraceElement
102 */
103 private native void toStackTraceElement0(StackTraceElement ste);
104
105 @Override
106 public StackTraceElement toStackTraceElement() {
107 StackTraceElement s = ste;
108 if (s == null) {
109 synchronized (this) {
110 s = ste;
111 if (s == null) {
|
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package java.lang;
26
27 import jdk.internal.misc.JavaLangInvokeAccess;
28 import jdk.internal.misc.SharedSecrets;
29
30 import static java.lang.StackWalker.Option.*;
31 import java.lang.StackWalker.StackFrame;
32
33 class StackFrameInfo implements StackFrame {
34 private final static JavaLangInvokeAccess JLIA =
35 SharedSecrets.getJavaLangInvokeAccess();
36
37 // Footprint improvement: MemberName::clazz can replace
38 // StackFrameInfo::declaringClass.
39
40 final StackWalker walker;
41 final Class<?> declaringClass;
42 final Object memberName;
43 final short bci;
44 private volatile StackTraceElement ste;
45
46 /*
47 * Create StackFrameInfo for StackFrameTraverser and LiveStackFrameTraverser
48 * to use
49 */
50 StackFrameInfo(StackWalker walker) {
51 this.walker = walker;
52 this.declaringClass = null;
53 this.bci = -1;
54 this.memberName = JLIA.newMemberName();
55 }
56
57 @Override
58 public String getClassName() {
59 return declaringClass.getName();
60 }
61
62 @Override
63 public Class<?> getDeclaringClass() {
64 walker.ensureAccessEnabled(RETAIN_CLASS_REFERENCE);
65 return declaringClass;
66 }
67
68 @Override
69 public String getMethodName() {
70 return JLIA.getName(memberName);
71 }
72
73 @Override
74 public final boolean isNativeMethod() {
75 return JLIA.isNative(memberName);
76 }
77
78 @Override
79 public String toString() {
80 StackTraceElement ste = toStackTraceElement();
81 return ste.toString();
82 }
83
84 /**
85 * Fill in the fields of the given StackTraceElement
86 */
87 private native void toStackTraceElement0(StackTraceElement ste);
88
89 @Override
90 public StackTraceElement toStackTraceElement() {
91 StackTraceElement s = ste;
92 if (s == null) {
93 synchronized (this) {
94 s = ste;
95 if (s == null) {
|