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80 lines
2.2 KiB
80 lines
2.2 KiB
/* |
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* Copyright (C) 2017 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#include <sys/cdefs.h> |
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#include <unistd.h> |
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#include <functional> |
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#include "Binder.h" |
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#include "log.h" |
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__BEGIN_DECLS |
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// Weak undefined references to the symbols in libbinder and libhwbinder |
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// so that libmemunreachable can call them in processes that have them |
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// loaded without requiring libmemunreachable to have dependencies on them. |
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ssize_t __attribute__((weak)) getBinderKernelReferences(size_t, uintptr_t*); |
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ssize_t __attribute__((weak)) getHWBinderKernelReferences(size_t, uintptr_t*); |
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__END_DECLS |
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namespace android { |
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static bool BinderReferencesToVector(allocator::vector<uintptr_t>& refs, |
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std::function<ssize_t(size_t, uintptr_t*)> fn) { |
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if (fn == nullptr) { |
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return true; |
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} |
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size_t size = refs.size(); |
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do { |
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refs.resize(size); |
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ssize_t ret = fn(refs.size(), refs.data()); |
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if (ret < 0) { |
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return false; |
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} |
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size = ret; |
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} while (size > refs.size()); |
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refs.resize(size); |
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return true; |
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} |
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bool BinderReferences(allocator::vector<uintptr_t>& refs) { |
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refs.clear(); |
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allocator::vector<uintptr_t> binder_refs{refs.get_allocator()}; |
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if (BinderReferencesToVector(refs, getBinderKernelReferences)) { |
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refs.insert(refs.end(), binder_refs.begin(), binder_refs.end()); |
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} else { |
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MEM_ALOGE("getBinderKernelReferences failed"); |
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} |
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allocator::vector<uintptr_t> hwbinder_refs{refs.get_allocator()}; |
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if (BinderReferencesToVector(hwbinder_refs, getHWBinderKernelReferences)) { |
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refs.insert(refs.end(), hwbinder_refs.begin(), hwbinder_refs.end()); |
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} else { |
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MEM_ALOGE("getHWBinderKernelReferences failed"); |
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} |
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return true; |
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} |
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} // namespace android
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