/**
* @param ec
* @see org.jnode.vm.x86.compiler.l1a.Item#release(EmitterContext)
*/
private void cleanup(EmitterContext ec) {
// assertCondition(!ec.getVStack().contains(this), "Cannot release while
// on vstack");
final X86RegisterPool pool = ec.getGPRPool();
switch (getKind()) {
case Kind.GPR:
pool.release(gpr);
if (VmUtils.verifyAssertions()) VmUtils._assert(pool.isFree(gpr), "reg is free");
break;
case Kind.LOCAL:
// nothing to do
break;
case Kind.CONSTANT:
// nothing to do
break;
case Kind.FPUSTACK:
// nothing to do
break;
case Kind.STACK:
// nothing to do
break;
default:
throw new IllegalArgumentException("Invalid item kind");
}
this.gpr = null;
setKind((byte) 0);
}
/**
* Load this item to a general purpose register.
*
* @param ec
*/
final void loadToGPR(EmitterContext ec) {
if (!isGPR()) {
X86Register r = ec.getGPRPool().request(JvmType.INT);
if (r == null) {
ec.getVStack().push(ec);
r = ec.getGPRPool().request(JvmType.INT);
}
if (VmUtils.verifyAssertions()) VmUtils._assert(r != null, "r != null");
loadTo(ec, (X86Register.GPR) r);
}
}
/**
* Load this item into a register that is suitable for BITS8 mode.
*
* @param ec
*/
final void loadToBITS8GPR(EmitterContext ec) {
if (!isGPR() || !gpr.isSuitableForBits8()) {
final X86RegisterPool pool = ec.getGPRPool();
X86Register r = pool.request(JvmType.INT, this, true);
if (r == null) {
ec.getVStack().push(ec);
r = ec.getGPRPool().request(JvmType.INT, this, true);
}
if (VmUtils.verifyAssertions()) VmUtils._assert(r != null, "r != null");
loadTo(ec, (X86Register.GPR) r);
}
}
protected final void initialize(EmitterContext ec, byte kind, X86Register reg, short local) {
super.initialize(
kind, local, ((reg instanceof X86Register.XMM) ? (X86Register.XMM) reg : null));
this.gpr = (reg instanceof X86Register.GPR) ? (X86Register.GPR) reg : null;
if (VmUtils.verifyAssertions()) {
switch (kind) {
case Kind.GPR:
VmUtils._assert((this.gpr != null), "kind == register implies that reg != null");
break;
}
verifyState(ec);
}
}
/**
* Gets the bytecode of a native code replacement method.
*
* @param method
* @param cl
* @return the bytecode
*/
private static VmByteCode getNativeCodeReplacement(
VmMethod method, VmClassLoader cl, boolean verbose) {
final String className = method.getDeclaringClass().getName();
final String nativeClassName = VmUtils.getNativeClassName(className);
final VmType nativeType;
try {
nativeType = cl.loadClass(nativeClassName, false);
} catch (ClassNotFoundException ex) {
if (verbose) {
BootLogInstance.get().error("Native class replacement (" + nativeClassName + ") not found");
}
return null;
}
String signature = method.getSignature();
if (!method.isStatic()) {
signature = '(' + Signature.toSignature(method.getDeclaringClass()) + signature.substring(1);
}
final VmMethod nativeMethod =
nativeType.getNativeMethodReplacement(method.getName(), signature);
if (nativeMethod == null) {
if (verbose) {
BootLogInstance.get().error("Native method replacement (" + method + ") not found");
}
return null;
}
if (!nativeMethod.isStatic()) {
throw new ClassFormatError("Native method replacement must be static");
}
return nativeMethod.getBytecode();
}
/** @see org.jnode.vm.x86.compiler.l1a.Item#load(EmitterContext) */
final void load(EmitterContext ec) {
if (!isGPR()) {
final X86RegisterPool pool = ec.getGPRPool();
X86Register r = pool.request(getType(), this);
if (r == null) {
final VirtualStack vstack = ec.getVStack();
vstack.push(ec);
r = pool.request(getType(), this);
}
if (VmUtils.verifyAssertions()) VmUtils._assert(r != null, "r != null");
loadTo(ec, (X86Register.GPR) r);
}
if (VmUtils.verifyAssertions()) {
verifyState(ec);
}
}
/**
* Gets the compiled code of a given stackframe.
*
* @param sf Stackframe pointer
* @return The compiled code
*/
final VmCompiledCode getCompiledCode(Address sf) {
final int ccid = sf.loadInt(getMethodIdOffset(sf));
if (ccid == 0) {
return null;
} else {
return VmUtils.getVm().getCompiledMethods().get(ccid);
}
}
/**
* @see org.jnode.vm.x86.compiler.l1a.Item#spill(EmitterContext,
* org.jnode.assembler.x86.X86Register)
*/
final void spill(EmitterContext ec, X86Register reg) {
if (VmUtils.verifyAssertions()) {
VmUtils._assert(
isGPR() && (this.gpr.getNr() == reg.getNr()), "spill1 gpr=" + gpr + ", reg=" + reg);
}
final X86RegisterPool pool = ec.getGPRPool();
X86Register r = pool.request(getType());
if (r == null) {
ec.getVStack().push(ec);
if (getKind() == Kind.STACK) {
return;
}
r = pool.request(getType());
if (VmUtils.verifyAssertions()) VmUtils._assert(r != null, "r != null");
}
loadTo(ec, (X86Register.GPR) r);
pool.transferOwnerTo(r, this);
if (VmUtils.verifyAssertions()) {
verifyState(ec);
}
}
/**
* Gets the method of a given stackframe.
*
* @param sf Stackframe pointer
* @return The method
*/
@KernelSpace
final VmMethod getMethod(Address sf) {
final int ccid = sf.loadInt(getMethodIdOffset(sf));
if (ccid == 0) {
return null;
} else {
final VmCompiledCode cc = VmUtils.getVm().getCompiledMethods().get(ccid);
if (cc == null) {
// (This can happen if an exception is thrown while a frame
// for a 'native' method call is on the stack. A panic is not a
// good idea. It is better to generate a stack trace with a missing
// method name.)
// Unsafe.die("Unknown ccid found on stack");
return null;
} else {
return cc.getMethod();
}
}
}
/**
* Read the method table
*
* @param data
* @param rejectNatives
* @param cls
* @param cp
* @param statics
* @param cl
*/
private static void readMethods(
ByteBuffer data,
boolean rejectNatives,
VmType cls,
VmCP cp,
VmStatics statics,
VmClassLoader cl) {
final int mcount = data.getChar();
if (mcount > 0) {
final VmMethod[] mtable = new VmMethod[mcount];
for (int i = 0; i < mcount; i++) {
final int modifiers = data.getChar();
final String name = cp.getUTF8(data.getChar());
final String signature = cp.getUTF8(data.getChar());
final boolean isStatic = ((modifiers & Modifier.ACC_STATIC) != 0);
final VmMethod mts;
final boolean isSpecial = name.equals("<init>");
// final int staticsIdx = statics.allocMethod();
if (isStatic || isSpecial) {
if (isSpecial) {
mts = new VmSpecialMethod(name, signature, modifiers, cls);
} else {
mts = new VmStaticMethod(name, signature, modifiers, cls);
}
} else {
mts = new VmInstanceMethod(name, signature, modifiers, cls);
}
// statics.setMethod(staticsIdx, mts);
mtable[i] = mts;
// Read methods attributes
final int acount = data.getChar();
VmAnnotation[] rVisAnn = null;
VmAnnotation[] rInvisAnn = null;
for (int a = 0; a < acount; a++) {
String attrName = cp.getUTF8(data.getChar());
int length = data.getInt();
if (VmArray.equals(CodeAttrName, attrName)) {
mts.setBytecode(readCode(data, cls, cp, mts));
} else if (VmArray.equals(ExceptionsAttrName, attrName)) {
mts.setExceptions(readExceptions(data, cls, cp));
} else if (VmArray.equals(RuntimeVisibleAnnotationsAttrName, attrName)) {
byte[] buf = new byte[length];
data.slice().get(buf);
mts.setRawAnnotations(buf);
// todo will get obsolate with openjdk based annotation support
// rVisAnn = readRuntimeAnnotations(data, cp, true, cl);
rVisAnn = readRuntimeAnnotations2(data, cp, true, cl, cls);
} else if (VmArray.equals(RuntimeInvisibleAnnotationsAttrName, attrName)) {
rInvisAnn = readRuntimeAnnotations(data, cp, false, cl);
} else if (VmArray.equals(RuntimeVisibleParameterAnnotationsAttrName, attrName)) {
byte[] buf = new byte[length];
data.slice().get(buf);
mts.setRawParameterAnnotations(buf);
// todo will get obsolate with openjdk based annotation support
readRuntimeParameterAnnotations(data, cp, true, cl);
} else if (VmArray.equals(RuntimeInvisibleParameterAnnotationsAttrName, attrName)) {
readRuntimeParameterAnnotations(data, cp, false, cl);
} else if (VmArray.equals(AnnotationDefaultAttrName, attrName)) {
// todo will get obsolate with openjdk based annotation support
byte[] buf = new byte[length];
data.slice().get(buf);
mts.setRawAnnotationDefault(buf);
Class r_class;
VmType vtm = mts.getReturnType();
if (vtm.isPrimitive()) {
r_class = getClassForJvmType(vtm.getJvmType());
} else {
try {
r_class = Class.forName(vtm.getName(), false, vtm.getLoader().asClassLoader());
} catch (ClassNotFoundException cnf) {
throw new RuntimeException(cnf);
}
}
Object defo =
AnnotationParser.parseMemberValue(
r_class,
data,
new VmConstantPool(cls),
VmUtils.isRunningVm() ? cls.asClass() : cls.asClassDuringBootstrap());
mts.setAnnotationDefault(defo);
} else {
skip(data, length);
}
}
mts.setRuntimeAnnotations(rVisAnn);
if (rVisAnn != null) {
mts.addPragmaFlags(getMethodPragmaFlags(rVisAnn, cls.getName()));
}
if (rInvisAnn != null) {
mts.addPragmaFlags(getMethodPragmaFlags(rInvisAnn, cls.getName()));
}
if ((modifiers & Modifier.ACC_NATIVE) != 0) {
final VmByteCode bc = getNativeCodeReplacement(mts, cl, rejectNatives);
if (bc != null) {
mts.setModifier(false, Modifier.ACC_NATIVE);
mts.setBytecode(bc);
} else {
if (rejectNatives) {
throw new ClassFormatError("Native method " + mts);
}
}
}
}
cls.setMethodTable(mtable);
}
}
/**
* load item with register reg. Assumes that reg is properly allocated
*
* @param ec current emitter context
* @param reg register to load the item to
*/
final void loadTo(EmitterContext ec, X86Register.GPR reg) {
if (VmUtils.verifyAssertions()) VmUtils._assert(reg != null, "Reg != null");
final X86Assembler os = ec.getStream();
final X86RegisterPool pool = ec.getGPRPool();
final VirtualStack stack = ec.getVStack();
final X86CompilerHelper helper = ec.getHelper();
if (VmUtils.verifyAssertions()) {
VmUtils._assert(!pool.isFree(reg), "reg not free");
}
switch (getKind()) {
case Kind.GPR:
if (this.gpr != reg) {
os.writeMOV(reg.getSize(), reg, this.gpr);
cleanup(ec);
}
break;
case Kind.LOCAL:
os.writeMOV(reg.getSize(), reg, helper.BP, getOffsetToFP(ec));
break;
case Kind.CONSTANT:
loadToConstant(ec, os, reg);
break;
case Kind.FPUSTACK:
// Make sure this item is on top of the FPU stack
FPUHelper.fxch(os, stack.fpuStack, this);
stack.fpuStack.pop(this);
// Convert & move to new space on normal stack
os.writeLEA(helper.SP, helper.SP, -helper.SLOTSIZE);
popFromFPU(os, helper.SP, 0);
os.writePOP(reg);
break;
case Kind.STACK:
// TODO: make sure 'this' is on top of stack
// TODO: implemen it for 64 bits
if (!stack.operandStack.isTos(this)) {
int stack_loc = stack.operandStack.stackLocation(this);
if (stack_loc < 0) throw new StackException("Item not found on stack");
stack.operandStack.makeTop(stack_loc);
// todo test it
os.writeMOV(
org.jnode.vm.x86.compiler.X86CompilerConstants.BITS32,
reg,
helper.SP,
helper.SLOTSIZE);
os.writeXCHG(
helper.SP, org.jnode.vm.x86.compiler.X86CompilerConstants.BITS32 * stack_loc, reg);
os.writeMOV(
org.jnode.vm.x86.compiler.X86CompilerConstants.BITS32,
helper.SP,
helper.SLOTSIZE,
reg);
}
if (VirtualStack.checkOperandStack) {
stack.operandStack.pop(this);
}
os.writePOP(reg);
break;
default:
throw new IllegalArgumentException("Invalid item kind");
}
setKind(Kind.GPR);
this.gpr = reg;
}
/**
* Gets the register the is used by this item.
*
* @return The register that contains this item
*/
final X86Register.GPR getRegister() {
if (VmUtils.verifyAssertions()) VmUtils._assert(isGPR(), "Must be register");
return gpr;
}
/**
* Gets the constant value of this item.
*
* @return
*/
final long getValue() {
if (VmUtils.verifyAssertions()) {
VmUtils._assert(isConstant(), "kind == Kind.CONSTANT");
}
return value;
}
/**
* Gets the MSB part of the constant value of this item.
*
* @return
*/
final int getMsbValue() {
if (VmUtils.verifyAssertions()) {
VmUtils._assert(isConstant(), "kind == Kind.CONSTANT");
}
return (int) ((value >>> 32) & 0xFFFFFFFFL);
}
/**
* Gets (creates if needed) a compiled code id.
*
* @return a compiled code id.
*/
public final int getCompiledCodeId() {
if (ccId < 0) {
ccId = VmUtils.getVm().getCompiledMethods().createId();
}
return ccId;
}
