public JavaDebugDisassemblyStream(JavaDebugCodeContext executionContext)
{
Contract.Requires <ArgumentNullException>(executionContext != null, "executionContext");
_executionContext = executionContext;
_bytecode = _executionContext.Location.GetMethod().GetBytecodes();
_disassembledMethod = BytecodeDisassembler.Disassemble(_bytecode);
var constantPool = executionContext.Location.GetDeclaringType().GetConstantPool();
var exceptionTable = executionContext.Location.GetMethod().GetExceptionTable();
_evaluationStackDepths = BytecodeDisassembler.GetEvaluationStackDepths(_disassembledMethod, constantPool, exceptionTable);
}
public JavaDebugDisassemblyStream(JavaDebugCodeContext executionContext)
{
Contract.Requires <ArgumentNullException>(executionContext != null, "executionContext");
_executionContext = executionContext;
_bytecode = _executionContext.Location.GetMethod().GetBytecodes();
_disassembledMethod = BytecodeDisassembler.Disassemble(_bytecode);
var constantPool = executionContext.Location.GetDeclaringType().GetConstantPool();
ReadOnlyCollection <ExceptionTableEntry> exceptionTable;
try
{
exceptionTable = executionContext.Location.GetMethod().GetExceptionTable();
}
catch (DebuggerException)
{
exceptionTable = new ReadOnlyCollection <ExceptionTableEntry>(new ExceptionTableEntry[0]);
}
_evaluationStackDepths = BytecodeDisassembler.GetEvaluationStackDepths(_disassembledMethod, constantPool, exceptionTable);
}
private bool TryGetAssociatedTree(out IParseTree associatedTree, out IList <IToken> tokens)
{
try
{
string sourcePath = _location.GetSourcePath();
if (!File.Exists(sourcePath))
{
associatedTree = null;
tokens = null;
return(false);
}
string text = File.ReadAllText(sourcePath);
AntlrInputStream input = new AntlrInputStream(text);
JavaLexer lexer = new JavaLexer(new JavaUnicodeStreamV4(input));
CommonTokenStream tokenStream = new CommonTokenStream(lexer);
JavaParser parser = new JavaParser(tokenStream);
parser.Interpreter.PredictionMode = PredictionMode.Sll;
parser.BuildParseTree = true;
JavaParser.CompilationUnitContext result = parser.compilationUnit();
associatedTree = null;
tokens = tokenStream.GetTokens();
AssociatedTreeListener listener = new AssociatedTreeListener(_location, tokens);
ParseTreeWalker.Default.Walk(listener, result);
List <IParseTree> potentialTrees = listener.AssociatedTree;
if (potentialTrees.Count == 1)
{
associatedTree = potentialTrees[0];
}
else if (potentialTrees.Count > 1)
{
byte[] bytecode = _location.GetMethod().GetBytecodes();
DisassembledMethod disassembledMethod = BytecodeDisassembler.Disassemble(bytecode);
var constantPool = _location.GetDeclaringType().GetConstantPool();
var exceptionTable = _location.GetMethod().GetExceptionTable();
ImmutableList <int?> evaluationStackDepths = BytecodeDisassembler.GetEvaluationStackDepths(disassembledMethod, constantPool, exceptionTable);
ReadOnlyCollection <ILocation> locations = _location.GetMethod().GetLineLocations();
// find all bytecode offsets with evaluation stack depth 0 on the current line
List <int> relevantOffsets = new List <int>();
for (int i = 0; i < locations.Count; i++)
{
if (locations[i].GetLineNumber() != _location.GetLineNumber())
{
continue;
}
long offsetLimit = i < locations.Count - 1 ? locations[i + 1].GetCodeIndex() : bytecode.Length;
// start with the instruction for this bytecode offset
for (int j = GetInstructionAtOffset(disassembledMethod, locations[i].GetCodeIndex());
j >= 0 && j < disassembledMethod.Instructions.Count && disassembledMethod.Instructions[j].Offset < offsetLimit;
j++)
{
if (evaluationStackDepths[j] == 0)
{
// ignore unconditional branches
if (disassembledMethod.Instructions[j].OpCode.FlowControl == JavaFlowControl.Branch)
{
continue;
}
relevantOffsets.Add(disassembledMethod.Instructions[j].Offset);
}
}
}
if (relevantOffsets.Count == potentialTrees.Count)
{
// heuristic: assume they appear in the same order as the source code on this line
int treeIndex = relevantOffsets.IndexOf((int)_location.GetCodeIndex());
if (treeIndex >= 0)
{
associatedTree = potentialTrees[treeIndex];
}
}
}
if (associatedTree == null)
{
tokens = null;
return(false);
}
return(true);
}
catch (Exception e)
{
if (ErrorHandler.IsCriticalException(e))
{
throw;
}
associatedTree = null;
tokens = null;
return(false);
}
}
public StepEventFilter(EventKind internalEventKind, RequestId requestId, SuspendPolicy suspendPolicy, IEnumerable <EventRequestModifier> modifiers, ThreadId thread, JvmtiEnvironment environment, JniEnvironment nativeEnvironment, StepSize size, StepDepth depth)
: base(internalEventKind, requestId, suspendPolicy, modifiers, thread)
{
if (size == StepSize.Statement && JavaVM.DisableStatementStepping)
{
size = StepSize.Line;
}
_size = size;
_depth = depth;
// gather reference information for the thread
using (var threadHandle = environment.VirtualMachine.GetLocalReferenceForThread(nativeEnvironment, thread))
{
if (threadHandle.IsAlive)
{
jvmtiError error = environment.GetFrameLocation(threadHandle.Value, 0, out _lastMethod, out _lastLocation);
if (error == jvmtiError.None)
{
error = environment.GetFrameCount(threadHandle.Value, out _stackDepth);
}
if (error == jvmtiError.None)
{
_hasMethodInfo = true;
}
UpdateLastLine(environment);
if (error == jvmtiError.None && size == StepSize.Statement && (depth == StepDepth.Over || depth == StepDepth.Into))
{
byte[] bytecode;
JvmtiErrorHandler.ThrowOnFailure(environment.GetBytecodes(_lastMethod, out bytecode));
_disassembledMethod = BytecodeDisassembler.Disassemble(bytecode);
TaggedReferenceTypeId declaringClass;
JvmtiErrorHandler.ThrowOnFailure(environment.GetMethodDeclaringClass(nativeEnvironment, _lastMethod, out declaringClass));
using (var classHandle = environment.VirtualMachine.GetLocalReferenceForClass(nativeEnvironment, declaringClass.TypeId))
{
int constantPoolCount;
byte[] data;
JvmtiErrorHandler.ThrowOnFailure(environment.GetConstantPool(classHandle.Value, out constantPoolCount, out data));
List <ConstantPoolEntry> entryList = new List <ConstantPoolEntry>();
int currentPosition = 0;
for (int i = 0; i < constantPoolCount - 1; i++)
{
entryList.Add(ConstantPoolEntry.FromBytes(data, ref currentPosition));
switch (entryList.Last().Type)
{
case ConstantType.Double:
case ConstantType.Long:
// these entries take 2 slots
entryList.Add(ConstantPoolEntry.Reserved);
i++;
break;
default:
break;
}
}
_constantPool = entryList.AsReadOnly();
string classSignature;
string classGenericSignature;
JvmtiErrorHandler.ThrowOnFailure(environment.GetClassSignature(classHandle.Value, out classSignature, out classGenericSignature));
string methodName;
string methodSignature;
string methodGenericSignature;
JvmtiErrorHandler.ThrowOnFailure(environment.GetMethodName(_lastMethod, out methodName, out methodSignature, out methodGenericSignature));
jobject classLoader;
JvmtiErrorHandler.ThrowOnFailure(environment.GetClassLoader(classHandle.Value, out classLoader));
long classLoaderTag;
JvmtiErrorHandler.ThrowOnFailure(environment.TagClassLoader(classLoader, out classLoaderTag));
ReadOnlyCollection <ExceptionTableEntry> exceptionTable;
JvmtiErrorHandler.ThrowOnFailure(environment.VirtualMachine.GetExceptionTable(classLoaderTag, classSignature, methodName, methodSignature, out exceptionTable));
_evaluationStackDepths = BytecodeDisassembler.GetEvaluationStackDepths(_disassembledMethod, _constantPool, exceptionTable);
}
}
}
}
}