private void commandFrame(StringTokenizer t) throws NoSessionException {
ThreadReference current = context.getCurrentThread();
if (current == null) {
env.failure("No current thread.");
return;
}
if (!t.hasMoreTokens()) {
env.error("usage: frame <frame-index>");
return;
}
String idToken = t.nextToken();
int n;
try {
n = Integer.valueOf(idToken).intValue();
} catch (NumberFormatException e) {
n = 0;
}
if (n <= 0) {
env.error("use positive frame index");
return;
}
try {
int delta = context.setCurrentFrameIndex(current, n);
if (delta == 0) {
env.notice("Frame unchanged.");
} else if (delta < 0) {
env.notice("Moved up " + -delta + " frames.");
} else {
env.notice("Moved down " + delta + " frames.");
}
} catch (VMNotInterruptedException e) {
env.failure("Target VM must be in interrupted state.");
}
}
private void commandStop(StringTokenizer t) throws NoSessionException {
String token;
if (!t.hasMoreTokens()) {
listEventRequests();
} else {
token = t.nextToken();
// Ignore optional "at" or "in" token.
// Allowed for backward compatibility.
if (token.equals("at") || token.equals("in")) {
if (t.hasMoreTokens()) {
token = t.nextToken();
} else {
env.error("Missing breakpoint specification.");
return;
}
}
BreakpointSpec bpSpec = parseBreakpointSpec(token);
if (bpSpec != null) {
// ### Add sanity-checks for deferred breakpoint.
runtime.install(bpSpec);
} else {
env.error("Ill-formed breakpoint specification.");
}
}
}
private void commandMethods(StringTokenizer t) throws NoSessionException {
if (!t.hasMoreTokens()) {
env.error("No class specified.");
return;
}
String idClass = t.nextToken();
ReferenceType cls = findClass(idClass);
if (cls != null) {
List<Method> methods = cls.allMethods();
OutputSink out = env.getOutputSink();
for (int i = 0; i < methods.size(); i++) {
Method method = methods.get(i);
out.print(method.declaringType().name() + " " + method.name() + "(");
Iterator<String> it = method.argumentTypeNames().iterator();
if (it.hasNext()) {
while (true) {
out.print(it.next());
if (!it.hasNext()) {
break;
}
out.print(", ");
}
}
out.println(")");
}
out.show();
} else {
// ### Should validate class name syntax.
env.failure("\"" + idClass + "\" is not a valid id or class name.");
}
}
/** Command: unmonitor Unmonitor an expression */
private void commandUnmonitor(StringTokenizer t) throws NoSessionException {
if (!t.hasMoreTokens()) {
env.error("Argument required");
} else {
env.getMonitorListModel().remove(t.nextToken(""));
}
}
private void commandWhere(StringTokenizer t, boolean showPC) throws NoSessionException {
ThreadReference current = context.getCurrentThread();
if (!t.hasMoreTokens()) {
if (current == null) {
env.error("No thread specified.");
return;
}
dumpStack(current, showPC);
} else {
String token = t.nextToken();
if (token.toLowerCase().equals("all")) {
ThreadIterator it = allThreads();
while (it.hasNext()) {
ThreadReference thread = it.next();
out.println(thread.name() + ": ");
dumpStack(thread, showPC);
}
} else {
ThreadReference thread = findThread(t.nextToken());
// ### Do we want to set current thread here?
// ### Should notify user of change.
if (thread != null) {
context.setCurrentThread(thread);
}
dumpStack(thread, showPC);
}
}
}
private ThreadReference findThread(String idToken) throws NoSessionException {
String id;
ThreadReference thread = null;
if (idToken.startsWith("t@")) {
id = idToken.substring(2);
} else {
id = idToken;
}
try {
ThreadReference[] threads = threads();
long threadID = Long.parseLong(id, 16);
for (ThreadReference thread2 : threads) {
if (thread2.uniqueID() == threadID) {
thread = thread2;
break;
}
}
if (thread == null) {
// env.failure("No thread for id \"" + idToken + "\"");
env.failure("\"" + idToken + "\" is not a valid thread id.");
}
} catch (NumberFormatException e) {
env.error("Thread id \"" + idToken + "\" is ill-formed.");
thread = null;
}
return thread;
}
private void commandKill(StringTokenizer t) throws NoSessionException {
// ### Should change the way in which thread ids and threadgroup names
// ### are distinguished.
if (!t.hasMoreTokens()) {
env.error("Usage: kill <threadgroup name> or <thread id>");
return;
}
while (t.hasMoreTokens()) {
String idToken = t.nextToken();
ThreadReference thread = findThread(idToken);
if (thread != null) {
runtime.stopThread(thread);
env.notice("Thread " + thread.name() + " killed.");
return;
} else {
/* Check for threadgroup name, NOT skipping "system". */
// ### Should skip "system"? Classic 'jdb' does this.
// ### Should deal with possible non-uniqueness of threadgroup names.
ThreadGroupIterator itg = allThreadGroups();
while (itg.hasNext()) {
ThreadGroupReference tg = itg.nextThreadGroup();
if (tg.name().equals(idToken)) {
ThreadIterator it = new ThreadIterator(tg);
while (it.hasNext()) {
runtime.stopThread(it.nextThread());
}
env.notice("Threadgroup " + tg.name() + "killed.");
return;
}
}
env.failure("\"" + idToken + "\" is not a valid threadgroup or id.");
}
}
}
private void commandClear(StringTokenizer t) throws NoSessionException {
if (!t.hasMoreTokens()) {
// Print set breakpoints
listEventRequests();
return;
}
// ### need 'clear all'
BreakpointSpec bpSpec = parseBreakpointSpec(t.nextToken());
if (bpSpec != null) {
List<EventRequestSpec> specs = runtime.eventRequestSpecs();
if (specs.isEmpty()) {
env.notice("No breakpoints set.");
} else {
List<EventRequestSpec> toDelete = new ArrayList<EventRequestSpec>();
for (EventRequestSpec spec : specs) {
if (spec.equals(bpSpec)) {
toDelete.add(spec);
}
}
// The request used for matching should be found
if (toDelete.size() <= 1) {
env.notice("No matching breakpoint set.");
}
for (EventRequestSpec spec : toDelete) {
runtime.delete(spec);
}
}
} else {
env.error("Ill-formed breakpoint specification.");
}
}
private void commandPrint(StringTokenizer t, boolean dumpObject) throws NoSessionException {
if (!t.hasMoreTokens()) {
// ### Probably confused if expresion contains whitespace.
env.error("No expression specified.");
return;
}
ThreadReference current = context.getCurrentThread();
if (current == null) {
env.failure("No default thread specified: " + "use the \"thread\" command first.");
return;
}
StackFrame frame;
try {
frame = context.getCurrentFrame(current);
if (frame == null) {
env.failure("Thread has not yet created any stack frames.");
return;
}
} catch (VMNotInterruptedException e) {
env.failure("Target VM must be in interrupted state.");
return;
}
while (t.hasMoreTokens()) {
String expr = t.nextToken("");
Value val = null;
try {
val = runtime.evaluate(frame, expr);
} catch (Exception e) {
env.error("Exception: " + e);
// ### Fix this!
}
if (val == null) {
return; // Error message already printed
}
OutputSink out = env.getOutputSink();
if (dumpObject && (val instanceof ObjectReference) && !(val instanceof StringReference)) {
ObjectReference obj = (ObjectReference) val;
ReferenceType refType = obj.referenceType();
out.println(expr + " = " + val.toString() + " {");
dump(out, obj, refType, refType);
out.println("}");
} else {
out.println(expr + " = " + val.toString());
}
out.show();
}
}
/** Check expression type */
public Vset checkValue(Environment env, Context ctx, Vset vset, Hashtable exp) {
vset = right.checkValue(env, ctx, vset, exp);
if (index == null) {
env.error(where, "array.index.required");
return vset;
}
vset = index.checkValue(env, ctx, vset, exp);
index = convert(env, ctx, Type.tInt, index);
if (!right.type.isType(TC_ARRAY)) {
if (!right.type.isType(TC_ERROR)) {
env.error(where, "not.array", right.type);
}
return vset;
}
type = right.type.getElementType();
return vset;
}
/** Generate code */
public void write(Environment env, DataOutputStream out, MemberDefinition field, ConstantPool tab)
throws IOException {
// listing(System.out);
if ((field != null) && field.getArguments() != null) {
int sum = 0;
Vector v = field.getArguments();
for (Enumeration e = v.elements(); e.hasMoreElements(); ) {
MemberDefinition f = ((MemberDefinition) e.nextElement());
sum += f.getType().stackSize();
}
maxvar = sum;
}
// Make sure the stack balances. Also calculate maxvar and maxstack
try {
balance(first, 0);
} catch (CompilerError e) {
System.out.println("ERROR: " + e);
listing(System.out);
throw e;
}
// Assign PCs
int pc = 0, nexceptions = 0;
for (Instruction inst = first; inst != null; inst = inst.next) {
inst.pc = pc;
int sz = inst.size(tab);
if (pc < 65536 && (pc + sz) >= 65536) {
env.error(inst.where, "warn.method.too.long");
}
pc += sz;
if (inst.opc == opc_try) {
nexceptions += ((TryData) inst.value).catches.size();
}
}
// Write header
out.writeShort(maxdepth);
out.writeShort(maxvar);
out.writeInt(maxpc = pc);
// Generate code
for (Instruction inst = first.next; inst != null; inst = inst.next) {
inst.write(out, tab);
}
// write exceptions
out.writeShort(nexceptions);
if (nexceptions > 0) {
// listing(System.out);
writeExceptions(env, out, tab, first, last);
}
}
private void commandThread(StringTokenizer t) throws NoSessionException {
if (!t.hasMoreTokens()) {
env.error("Thread number not specified.");
return;
}
ThreadReference thread = findThread(t.nextToken());
if (thread != null) {
// ### Should notify user.
context.setCurrentThread(thread);
}
}
private void commandThreadGroup(StringTokenizer t) throws NoSessionException {
if (!t.hasMoreTokens()) {
env.error("Threadgroup name not specified.");
return;
}
String name = t.nextToken();
ThreadGroupReference tg = findThreadGroup(name);
if (tg == null) {
env.failure(name + " is not a valid threadgroup name.");
} else {
// ### Should notify user.
setDefaultThreadGroup(tg);
}
}
private void commandView(StringTokenizer t) throws NoSessionException {
if (!t.hasMoreTokens()) {
env.error("Argument required");
} else {
String name = t.nextToken();
if (name.endsWith(".java") || name.indexOf(File.separatorChar) >= 0) {
env.viewSource(name);
} else {
// ### JDI crashes taking line number for class.
/**
* *** ReferenceType cls = findClass(name); if (cls != null) {
* env.viewLocation(cls.location()); } else { env.failure("No such class"); } ***
*/
String fileName = name.replace('.', File.separatorChar) + ".java";
env.viewSource(fileName);
}
}
}
public Vset checkAmbigName(
Environment env, Context ctx, Vset vset, Hashtable exp, UnaryExpression loc) {
if (index == null) {
vset = right.checkAmbigName(env, ctx, vset, exp, this);
if (right.type == Type.tPackage) {
FieldExpression.reportFailedPackagePrefix(env, right);
return vset;
}
// Nope. Is this field expression a type?
if (right instanceof TypeExpression) {
Type atype = Type.tArray(right.type);
loc.right = new TypeExpression(where, atype);
return vset;
}
env.error(where, "array.index.required");
return vset;
}
return super.checkAmbigName(env, ctx, vset, exp, loc);
}
private void commandDown(StringTokenizer t) throws NoSessionException {
ThreadReference current = context.getCurrentThread();
if (current == null) {
env.failure("No current thread.");
return;
}
int nLevels = readCount(t);
if (nLevels <= 0) {
env.error("usage: down [n frames]");
return;
}
try {
int delta = context.moveCurrentFrameIndex(current, nLevels);
if (delta == 0) {
env.notice("Already at bottom of stack.");
} else if (delta < nLevels) {
env.notice("Moved down " + delta + " frames to bottom of stack.");
}
} catch (VMNotInterruptedException e) {
env.failure("Target VM must be in interrupted state.");
}
}
/** Check statement */
Vset check(Environment env, Context ctx, Vset vset, Hashtable exp) {
checkLabel(env, ctx);
vset = reach(env, vset);
if (expr != null) {
vset = expr.checkValue(env, ctx, vset, exp);
}
// Make sure the return isn't inside a static initializer
if (ctx.field.isInitializer()) {
env.error(where, "return.inside.static.initializer");
return DEAD_END;
}
// Check return type
if (ctx.field.getType().getReturnType().isType(TC_VOID)) {
if (expr != null) {
if (ctx.field.isConstructor()) {
env.error(where, "return.with.value.constr", ctx.field);
} else {
env.error(where, "return.with.value", ctx.field);
}
expr = null;
}
} else {
if (expr == null) {
env.error(where, "return.without.value", ctx.field);
} else {
expr = convert(env, ctx, ctx.field.getType().getReturnType(), expr);
}
}
CheckContext mctx = ctx.getReturnContext();
if (mctx != null) {
mctx.vsBreak = mctx.vsBreak.join(vset);
}
CheckContext exitctx = ctx.getTryExitContext();
if (exitctx != null) {
exitctx.vsTryExit = exitctx.vsTryExit.join(vset);
}
if (expr != null) {
// see if we are returning a value out of a try or synchronized
// statement. If so, find the outermost one. . . .
Node outerFinallyNode = null;
for (Context c = ctx; c != null; c = c.prev) {
if (c.node == null) {
continue;
}
if (c.node.op == METHOD) {
// Don't search outside current method. Fixes 4084230.
break;
}
if (c.node.op == SYNCHRONIZED) {
outerFinallyNode = c.node;
break;
} else if (c.node.op == FINALLY && ((CheckContext) c).vsContinue != null) {
outerFinallyNode = c.node;
}
}
if (outerFinallyNode != null) {
if (outerFinallyNode.op == FINALLY) {
((FinallyStatement) outerFinallyNode).needReturnSlot = true;
} else {
((SynchronizedStatement) outerFinallyNode).needReturnSlot = true;
}
}
}
return DEAD_END;
}
private void commandList(StringTokenizer t) throws NoSessionException {
ThreadReference current = context.getCurrentThread();
if (current == null) {
env.error("No thread specified.");
return;
}
Location loc;
try {
StackFrame frame = context.getCurrentFrame(current);
if (frame == null) {
env.failure("Thread has not yet begun execution.");
return;
}
loc = frame.location();
} catch (VMNotInterruptedException e) {
env.failure("Target VM must be in interrupted state.");
return;
}
SourceModel source = sourceManager.sourceForLocation(loc);
if (source == null) {
if (loc.method().isNative()) {
env.failure("Current method is native.");
return;
}
env.failure("No source available for " + Utils.locationString(loc) + ".");
return;
}
ReferenceType refType = loc.declaringType();
int lineno = loc.lineNumber();
if (t.hasMoreTokens()) {
String id = t.nextToken();
// See if token is a line number.
try {
lineno = Integer.valueOf(id).intValue();
} catch (NumberFormatException nfe) {
// It isn't -- see if it's a method name.
List<Method> meths = refType.methodsByName(id);
if (meths == null || meths.size() == 0) {
env.failure(
id + " is not a valid line number or " + "method name for class " + refType.name());
return;
} else if (meths.size() > 1) {
env.failure(id + " is an ambiguous method name in" + refType.name());
return;
}
loc = meths.get(0).location();
lineno = loc.lineNumber();
}
}
int startLine = (lineno > 4) ? lineno - 4 : 1;
int endLine = startLine + 9;
String sourceLine = source.sourceLine(lineno);
if (sourceLine == null) {
env.failure("" + lineno + " is an invalid line number for " + refType.name());
} else {
OutputSink out = env.getOutputSink();
for (int i = startLine; i <= endLine; i++) {
sourceLine = source.sourceLine(i);
if (sourceLine == null) {
break;
}
out.print(i);
out.print("\t");
if (i == lineno) {
out.print("=> ");
} else {
out.print(" ");
}
out.println(sourceLine);
}
out.show();
}
}
/** Select the type */
final void selectType(Environment env, Context ctx, int tm) {
Type rtype = null; // special conversion type for RHS
switch (op) {
case ASGADD:
if (left.type == Type.tString) {
if (right.type == Type.tVoid) {
// The type of the right hand side can be
// anything except void. Fix for 4119864.
env.error(where, "incompatible.type", opNames[op], Type.tVoid, Type.tString);
type = Type.tError;
} else {
type = itype = Type.tString;
}
return;
}
/* Fall through */
case ASGDIV:
case ASGMUL:
case ASGSUB:
case ASGREM:
if ((tm & TM_DOUBLE) != 0) {
itype = Type.tDouble;
} else if ((tm & TM_FLOAT) != 0) {
itype = Type.tFloat;
} else if ((tm & TM_LONG) != 0) {
itype = Type.tLong;
} else {
itype = Type.tInt;
}
break;
case ASGBITAND:
case ASGBITOR:
case ASGBITXOR:
if ((tm & TM_BOOLEAN) != 0) {
itype = Type.tBoolean;
} else if ((tm & TM_LONG) != 0) {
itype = Type.tLong;
} else {
itype = Type.tInt;
}
break;
case ASGLSHIFT:
case ASGRSHIFT:
case ASGURSHIFT:
rtype = Type.tInt;
// Fix for bug 4134459.
// We allow any integral type (even long) to
// be the right hand side of a shift operation.
if (right.type.inMask(TM_INTEGER)) {
right = new ConvertExpression(where, Type.tInt, right);
}
// The intermediate type of the expression is the
// type of the left hand side after undergoing
// unary (not binary) type promotion. We ignore
// tm -- it contains information about both left
// and right hand sides -- and we compute the
// type only from the type of the lhs.
if (left.type == Type.tLong) {
itype = Type.tLong;
} else {
itype = Type.tInt;
}
break;
default:
throw new CompilerError("Bad assignOp type: " + op);
}
if (rtype == null) {
rtype = itype;
}
right = convert(env, ctx, rtype, right);
// The result is always the type of the left operand.
type = left.type;
}
Type toType(Environment env, Type t) {
if (index != null) {
env.error(index.where, "array.dim.in.type");
}
return Type.tArray(t);
}