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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.
*/
#include "verifier/dex_gc_map.h"
#include "logging.h"
namespace art {
namespace verifier {
const uint8_t* DexPcToReferenceMap::FindBitMap(uint16_t dex_pc, bool error_if_not_present) const {
size_t num_entries = NumEntries();
// Do linear or binary search?
static const size_t kSearchThreshold = 8;
if (num_entries < kSearchThreshold) {
for (size_t i = 0; i < num_entries; i++) {
if (GetDexPc(i) == dex_pc) {
return GetBitMap(i);
}
}
} else {
int lo = 0;
int hi = num_entries -1;
while (hi >= lo) {
int mid = (hi + lo) / 2;
int mid_pc = GetDexPc(mid);
if (dex_pc > mid_pc) {
lo = mid + 1;
} else if (dex_pc < mid_pc) {
hi = mid - 1;
} else {
return GetBitMap(mid);
}
}
}
if (error_if_not_present) {
LOG(ERROR) << "Didn't find reference bit map for dex_pc " << dex_pc;
}
return NULL;
}
} // namespace verifier
} // namespace art