|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
*/ |
|
package java.lang; |
|
|
|
import jdk.internal.misc.JavaLangInvokeAccess; |
|
import jdk.internal.misc.SharedSecrets; |
|
|
|
import static java.lang.StackWalker.Option.*; |
|
import java.lang.StackWalker.StackFrame; |
|
import java.lang.invoke.MethodType; |
|
|
|
class StackFrameInfo implements StackFrame { |
|
private final byte RETAIN_CLASS_REF = 0x01; |
|
|
|
private final static JavaLangInvokeAccess JLIA = |
|
SharedSecrets.getJavaLangInvokeAccess(); |
|
|
|
private final byte flags; |
|
private final Object memberName; |
|
private final short bci; |
|
private volatile StackTraceElement ste; |
|
|
|
|
|
|
|
|
|
*/ |
|
StackFrameInfo(StackWalker walker) { |
|
this.flags = walker.retainClassRef ? RETAIN_CLASS_REF : 0; |
|
this.bci = -1; |
|
this.memberName = JLIA.newMemberName(); |
|
} |
|
|
|
// package-private called by StackStreamFactory to skip |
|
|
|
Class<?> declaringClass() { |
|
return JLIA.getDeclaringClass(memberName); |
|
} |
|
|
|
// ----- implementation of StackFrame methods |
|
|
|
@Override |
|
public String getClassName() { |
|
return declaringClass().getName(); |
|
} |
|
|
|
@Override |
|
public Class<?> getDeclaringClass() { |
|
ensureRetainClassRefEnabled(); |
|
return declaringClass(); |
|
} |
|
|
|
@Override |
|
public String getMethodName() { |
|
return JLIA.getName(memberName); |
|
} |
|
|
|
@Override |
|
public MethodType getMethodType() { |
|
ensureRetainClassRefEnabled(); |
|
return JLIA.getMethodType(memberName); |
|
} |
|
|
|
@Override |
|
public String getDescriptor() { |
|
return JLIA.getMethodDescriptor(memberName); |
|
} |
|
|
|
@Override |
|
public int getByteCodeIndex() { |
|
|
|
if (isNativeMethod()) |
|
return -1; |
|
|
|
return bci; |
|
} |
|
|
|
@Override |
|
public String getFileName() { |
|
return toStackTraceElement().getFileName(); |
|
} |
|
|
|
@Override |
|
public int getLineNumber() { |
|
|
|
if (isNativeMethod()) |
|
return -2; |
|
|
|
return toStackTraceElement().getLineNumber(); |
|
} |
|
|
|
|
|
@Override |
|
public boolean isNativeMethod() { |
|
return JLIA.isNative(memberName); |
|
} |
|
|
|
@Override |
|
public String toString() { |
|
return toStackTraceElement().toString(); |
|
} |
|
|
|
@Override |
|
public StackTraceElement toStackTraceElement() { |
|
StackTraceElement s = ste; |
|
if (s == null) { |
|
synchronized (this) { |
|
s = ste; |
|
if (s == null) { |
|
ste = s = StackTraceElement.of(this); |
|
} |
|
} |
|
} |
|
return s; |
|
} |
|
|
|
private void ensureRetainClassRefEnabled() { |
|
if ((flags & RETAIN_CLASS_REF) == 0) { |
|
throw new UnsupportedOperationException("No access to RETAIN_CLASS_REFERENCE"); |
|
} |
|
} |
|
} |