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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_SRC_NTH_CALLER_VISITOR_H_
#define ART_SRC_NTH_CALLER_VISITOR_H_
#include "object.h"
#include "thread.h"
namespace art {
// Walks up the stack 'n' callers, when used with Thread::WalkStack.
struct NthCallerVisitor : public StackVisitor {
NthCallerVisitor(const ManagedStack* stack, const std::vector<TraceStackFrame>* trace_stack,
size_t n) : StackVisitor(stack, trace_stack), n(n), count(0), caller(NULL) {}
bool VisitFrame() {
DCHECK(caller == NULL);
if (count++ == n) {
caller = GetMethod();
return false;
}
return true;
}
size_t n;
size_t count;
Method* caller;
};
} // namespace art
#endif // ART_SRC_NTH_CALLER_VISITOR_H_