private bool ShouldSkipCurrentMethod(JavaVM virtualMachine, JvmtiEnvironment environment, JniEnvironment nativeEnvironment, jthread thread, int stackDepth, Location location, out bool convertToFramePop)
{
Contract.Assert(_depth == StepDepth.Into || _depth == StepDepth.Over);
convertToFramePop = false;
if (!_hasMethodInfo || stackDepth < _stackDepth || (stackDepth == _stackDepth && (location.Method.Equals(_lastMethod))))
return false;
/*
* change this to a Frame Pop event if we're not in a native frame
*/
bool native;
jvmtiError error = environment.IsMethodNative(location.Method, out native);
if (error != jvmtiError.None)
return false;
convertToFramePop = !native;
if (_depth == StepDepth.Over || native)
return true;
JvmAccessModifiers modifiers;
error = environment.GetMethodModifiers(location.Method, out modifiers);
if (error != jvmtiError.None || ((modifiers & JvmAccessModifiers.Static) != 0))
return false;
jobject thisObject;
error = environment.GetLocalObject(thread, 0, 0, out thisObject);
if (error != jvmtiError.None)
return false;
try
{
bool classLoader = nativeEnvironment.IsInstanceOf(thisObject, virtualMachine.ClassLoaderClass);
if (!classLoader)
return false;
string name;
string signature;
string genericSignature;
error = environment.GetMethodName(location.Method, out name, out signature, out genericSignature);
if (error != jvmtiError.None)
return false;
if (name == "loadClass" && signature == "(Ljava/lang/String;)Ljava/lang/Class;")
return true;
if (name == "checkPackageAccess" && signature == "(Ljava/lang/Class;Ljava/security/ProtectionDomain;)V")
return true;
return false;
}
finally
{
nativeEnvironment.DeleteLocalReference(thisObject);
}
}
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);
}
}
}
}
}