OpenJDK 1.23 · com.sun.tools.javac.jvm.Code · APIdia, the JavaDoc alternative

Modifier and Type	Class and Description
public static class	Code.Chain A chain represents a list of unresolved jumps.
pack-priv static class	Code.LocalVar A live range of a local variable.
private static class	Code.Mneumonics
public static enum	Code.StackMapFormat
pack-priv static class	Code.StackMapFrame An entry in the stack map.
pack-priv class	Code.State

Field Summary

Modifier and Type	Field and Description
private boolean	alive Code generation enabled?
pack-priv ListBuffer<char[]>	catchInfo A buffer for expression catch data.
public byte[]	code The code buffer.
public int	cp the current code pointer.
public CRTable	crt The CharacterRangeTable
public final boolean	debugCode
public boolean	fatcode Are we generating code with jumps ≥ 32K?
private boolean	fixedPc Is it forbidden to compactify code, because something is pointing to current location?
pack-priv Code.StackMapFrame	frameBeforeLast The stack map frame before the last one.
pack-priv static final Type	jsrReturnValue
pack-priv Code.StackMapFrame	lastFrame The last stack map frame in StackMapTable.
pack-priv int	lastStackMapPC The last PC at which we generated a stack map.
private int	letExprStackPos
pack-priv boolean	lineDebugInfo Switch: emit line number info.
pack-priv List<char[]>	lineInfo A buffer for line number information.
pack-priv Position.LineMap	lineMap Emit line number info if map supplied
pack-priv Code.LocalVar[]	lvar Local variables, indexed by register.
public int	max_locals The maximum number of local variable slots.
public int	max_stack The maximum stack size.
pack-priv final Symbol.MethodSymbol	meth
public final boolean	needStackMap
public int	nextreg The next available register.
pack-priv Code.Chain	pendingJumps A chain for jumps to be resolved before the next opcode is emitted.
pack-priv boolean	pendingStackMap Set true when a stackMap is needed at the current PC.
pack-priv int	pendingStatPos The position of the currently statement, if we are at the start of this statement, NOPOS otherwise.
pack-priv final PoolWriter	poolWriter
pack-priv Code.StackMapFormat	stackMap The stack map format to be generated.
pack-priv Code.StackMapFrame[]	stackMapBuffer A buffer of cldc stack map entries.
pack-priv int	stackMapBufferSize
pack-priv ClassWriter.StackMapTableFrame[]	stackMapTableBuffer A buffer of compressed StackMapTable entries.
pack-priv Code.State	state The current machine state (registers and stack).
pack-priv final Symtab	syms
pack-priv final Types	types
pack-priv Code.LocalVar[]	varBuffer Previously live local variables, to be put into the variable table.
pack-priv int	varBufferSize
pack-priv boolean	varDebugInfo Switch: emit variable debug info.

Access	Constructor and Description
public	Code(Symbol.MethodSymbol meth, boolean fatcode, Position.LineMap lineMap, boolean varDebugInfo, Code.StackMapFormat stackMap, boolean debugCode, CRTable crt, Symtab syms, Types types, PoolWriter poolWriter) Construct a code object, given the settings of the fatcode, debugging info switches and the CharacterRangeTable.

Method Summary

Modifier and Type	Method and Description
public void	addCatch(char startPc, char endPc, char handlerPc, char catchType) Add a catch clause to code.
public void	addLineNumber(char startPc, char lineNumber) Add a line number entry.
private void	addLocalVar(Symbol.VarSymbol v) Add a new local variable.
pack-priv void	adjustAliveRanges(int oldCP, int delta)
public void	align(int incr) Align code pointer to next `incr' boundary.
private int[]	appendArray(int[] source, int[] append)
public static int	arraycode(Type type) Given a type, return its code for allocating arrays of that type.
public Code.Chain	branch(int opcode) Emit a branch with given opcode; return its chain.
public boolean	checkLimits(JCDiagnostic.DiagnosticPosition pos, Log log) Check the code against VM spec limits; if problems report them and return true.
public void	compressCatchTable()
public int	curCP() The current output code pointer.
private void	emit1(int od) Emit a byte of code.
private void	emit2(int od) Emit two bytes of code.
public void	emit4(int od) Emit four bytes of code.
public void	emitAnewarray(int od, Type arrayType) Emit anewarray.
pack-priv void	emitCLDCStackMap(int pc, int localsSize) Emit a CLDC stack map frame.
public void	emitInvokedynamic(Symbol.DynamicMethodSymbol dynMember, Type mtype) Emit an invokedynamic instruction.
public void	emitInvokeinterface(Symbol member, Type mtype) Emit an invokeinterface instruction.
public void	emitInvokespecial(Symbol member, Type mtype) Emit an invokespecial instruction.
public void	emitInvokestatic(Symbol member, Type mtype) Emit an invokestatic instruction.
public void	emitInvokevirtual(Symbol member, Type mtype) Emit an invokevirtual instruction.
public int	emitJump(int opcode) Emit a jump instruction.
public void	emitLdc(PoolConstant.LoadableConstant constant) Emit a ldc (or ldc_w) instruction, taking into account operand size
public void	emitMultianewarray(int ndims, int type, Type arrayType) Emit a multinewarray instruction.
public void	emitNewarray(int elemcode, Type arrayType) Emit newarray.
private void	emitop(int op) Emit an opcode.
public void	emitop0(int op) Emit an opcode with no operand field.
public void	emitop1(int op, int od) Emit an opcode with a one-byte operand field.
public void	emitop1(int op, int od, PoolConstant data)
public void	emitop1w(int op, int od) Emit an opcode with a one-byte operand field; widen if field does not fit in a byte.
public void	emitop1w(int op, int od1, int od2) Emit an opcode with two one-byte operand fields; widen if either field does not fit in a byte.
public <P extends PoolConstant> void	emitop2(int op, P constant, ToIntBiFunction<PoolWriter, P> poolFunc) Emit an opcode with a two-byte operand field.
public void	emitop2(int op, int od)
public void	emitop2(int op, int od, PoolConstant data)
public void	emitop4(int op, int od) Emit an opcode with a four-byte operand field.
public void	emitStackMap() Emit a stack map entry.
pack-priv void	emitStackMapFrame(int pc, int localsSize)
private void	endScope(int adr) End the scope of a variable.
public void	endScopes(int first) End scopes of all variables with registers ≥ first.
public int	entryPoint() Declare an entry point; return current code pointer
public int	entryPoint(Code.State state) Declare an entry point with initial state; return current code pointer
public int	entryPoint(Code.State state, Type pushed) Declare an entry point with initial state plus a pushed value; return current code pointer
public void	fillExceptionParameterPositions()
private void	fillLocalVarPosition(Code.LocalVar lv)
private int	findExceptionIndex(TypeAnnotationPosition p)
private int	get1(int pc) Return code byte at position pc as an unsigned int.
private int	get2(int pc) Return two code bytes at position pc as an unsigned int.
public int	get4(int pc) Return four code bytes at position pc as an int.
pack-priv Code.StackMapFrame	getInitialFrame()
private int	getLocalsSize()
public int	getLVTSize() Calculates the size of the LocalVariableTable.
public boolean	isAlive() Is code generation currently enabled?
public boolean	isStatementStart()
public void	markDead() Switch code generation on/off.
public void	markStatBegin() Force stat begin eagerly
public static Code.Chain	mergeChains(Code.Chain chain1, Code.Chain chain2) Merge the jumps in of two chains into one.
public static String	mnem(int opcode)
public static int	negate(int opcode) Negate a branch opcode.
private int	newLocal(int typecode) Create a new local variable address and return it.
private int	newLocal(Type type)
public int	newLocal(Symbol.VarSymbol v)
public void	newRegSegment() Start a set of fresh registers.
pack-priv void	postop()
private void	put1(int pc, int op) Place a byte into code at address pc.
private void	put2(int pc, int od) Place two bytes into code at address pc.
public void	put4(int pc, int od) Place four bytes into code at address pc.
pack-priv void	putVar(Code.LocalVar var) Put a live variable range into the buffer to be output to the class file.
public void	resolve(Code.Chain chain, int target) Resolve chain to point to given target.
public void	resolve(Code.Chain chain) Resolve chain to point to current code pointer.
public void	resolvePending() Resolve any pending jumps.
public void	setDefined(Bits newDefined) Set the current variable defined state.
public void	setDefined(int adr) Mark a register as being (possibly) defined.
public int	setLetExprStackPos(int pos)
public void	setUndefined(int adr) Mark a register as being undefined.
public void	statBegin(int pos) Mark beginning of statement.
public static int	truncate(int tc) Collapse type code for subtypes of int to INTcode.
public static int	typecode(Type type) Given a type, return its type code (used implicitly in the JVM architecture).
public static int	width(int typecode) The width in bytes of objects of the type.
public static int	width(Type type)
public static int	width(List<Type> types) The total width taken up by a vector of objects.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

public Class Code

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary