jdk.internal.jvmci.meta

Class MetaUtil

java.lang.Object

jdk.internal.jvmci.meta.MetaUtil

public class MetaUtil
extends Object

Miscellaneous collection of utility methods used by jdk.internal.jvmci.meta and its clients.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	MetaUtil.ClassInfo

Constructor Summary

Constructors

Constructor and Description
MetaUtil()

Method Summary

Modifier and Type	Method and Description
static StringBuilder	appendLocation(StringBuilder sb, ResolvedJavaMethod method, int bci) Appends a string representation of a location specified by a given method and bci to a given StringBuilder.
(package private) static void	appendProfile(StringBuilder buf, AbstractJavaProfile<?,?> profile, int bci, String type, String sep)
static ResolvedJavaType	classForName(String internal, MetaAccessProvider metaAccess, ClassLoader cl) Turns an class name in internal format into a resolved Java type.
static long	getMemorySizeRecursive(MetaAccessProvider access, ConstantReflectionProvider constantReflection, JavaConstant constant, PrintStream out, int printTopN) Returns the number of bytes occupied by this constant value or constant object and recursively all values reachable from this value.
(package private) static int	getNonPublicModifierStaticField(String name) Used to lookup constants from Modifier that are not public (VARARGS, SYNTHETIC etc.).
static String	getSimpleName(Class<?> clazz, boolean withEnclosingClass) Extends the functionality of Class.getSimpleName() to include a non-empty string for anonymous and local classes.
static String	identityHashCodeString(Object obj) Gets a string representation of an object based soley on its class and its identity hash code.
static String	indent(String lines, String indentation) Prepends the String indentation to every line in String lines, including a possibly non-empty line following the final newline.
(package private) static String	internalNameToJava(String name, boolean qualified, boolean classForNameCompatible)
private static void	pushConstant(Set<JavaConstant> marked, Deque<JavaConstant> stack, JavaConstant value)
static ResolvedJavaType[]	resolveJavaTypes(JavaType[] types, ResolvedJavaType accessingClass) Calls JavaType.resolve(ResolvedJavaType) on an array of types.
static String	toInternalName(String className) Converts a Java source-language class name into the internal form.
static String	toLocation(ResolvedJavaMethod method, int bci) Convenient shortcut for calling appendLocation(StringBuilder, ResolvedJavaMethod, int) without having to supply a StringBuilder instance and convert the result to a string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MetaUtil

public MetaUtil()

Method Detail

getMemorySizeRecursive

public static long getMemorySizeRecursive(MetaAccessProvider access,
                                          ConstantReflectionProvider constantReflection,
                                          JavaConstant constant,
                                          PrintStream out,
                                          int printTopN)

Returns the number of bytes occupied by this constant value or constant object and recursively all values reachable from this value.

Parameters:

constant - the constant whose bytes should be measured

printTopN - print total size and instance count of the top n classes is desired

Returns:

the number of bytes occupied by this constant

pushConstant

private static void pushConstant(Set<JavaConstant> marked,
                                 Deque<JavaConstant> stack,
                                 JavaConstant value)

resolveJavaTypes

public static ResolvedJavaType[] resolveJavaTypes(JavaType[] types,
                                                  ResolvedJavaType accessingClass)

Calls JavaType.resolve(ResolvedJavaType) on an array of types.

getSimpleName

public static String getSimpleName(Class<?> clazz,
                                   boolean withEnclosingClass)

Extends the functionality of Class.getSimpleName() to include a non-empty string for anonymous and local classes.

Parameters:

clazz - the class for which the simple name is being requested

withEnclosingClass - specifies if the returned name should be qualified with the name(s) of the enclosing class/classes of clazz (if any). This option is ignored if clazz denotes an anonymous or local class.

Returns:

the simple name

internalNameToJava

static String internalNameToJava(String name,
                                 boolean qualified,
                                 boolean classForNameCompatible)

classForName

public static ResolvedJavaType classForName(String internal,
                                            MetaAccessProvider metaAccess,
                                            ClassLoader cl)

Turns an class name in internal format into a resolved Java type.

toLocation

public static String toLocation(ResolvedJavaMethod method,
                                int bci)

Convenient shortcut for calling appendLocation(StringBuilder, ResolvedJavaMethod, int) without having to supply a StringBuilder instance and convert the result to a string.

appendLocation

public static StringBuilder appendLocation(StringBuilder sb,
                                           ResolvedJavaMethod method,
                                           int bci)

Appends a string representation of a location specified by a given method and bci to a given StringBuilder. If a stack trace element with a non-null file name and non-negative line number is available for the given method, then the string returned is the StackTraceElement.toString() value of the stack trace element, suffixed by the bci location. For example:

     java.lang.String.valueOf(String.java:2930) [bci: 12]
 

Otherwise, the string returned is the value of applying JavaMethod.format(String) with the format string "%H.%n(%p)", suffixed by the bci location. For example:

     java.lang.String.valueOf(int) [bci: 12]
 

Parameters:

sb -

method -

bci -

appendProfile

static void appendProfile(StringBuilder buf,
                          AbstractJavaProfile<?,?> profile,
                          int bci,
                          String type,
                          String sep)

toInternalName

public static String toInternalName(String className)

Converts a Java source-language class name into the internal form.

Parameters:

className - the class name

Returns:

the internal name form of the class name

indent

public static String indent(String lines,
                            String indentation)

Prepends the String indentation to every line in String lines, including a possibly non-empty line following the final newline.

identityHashCodeString

public static String identityHashCodeString(Object obj)

Gets a string representation of an object based soley on its class and its identity hash code. This avoids and calls to virtual methods on the object such as Object.hashCode().

getNonPublicModifierStaticField

static int getNonPublicModifierStaticField(String name)

Used to lookup constants from Modifier that are not public (VARARGS, SYNTHETIC etc.).