| /* |
| * Copyright (C) 2017 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 <sys/cdefs.h> |
| #include <unistd.h> |
| |
| #include <functional> |
| |
| #include "Binder.h" |
| #include "log.h" |
| |
| __BEGIN_DECLS |
| |
| // Weak undefined references to the symbols in libbinder and libhwbinder |
| // so that libmemunreachable can call them in processes that have them |
| // loaded without requiring libmemunreachable to have dependencies on them. |
| ssize_t __attribute__((weak)) getBinderKernelReferences(size_t, uintptr_t*); |
| ssize_t __attribute__((weak)) getHWBinderKernelReferences(size_t, uintptr_t*); |
| |
| __END_DECLS |
| |
| namespace android { |
| |
| static bool BinderReferencesToVector(allocator::vector<uintptr_t>& refs, |
| std::function<ssize_t(size_t, uintptr_t*)> fn) { |
| if (fn == nullptr) { |
| return true; |
| } |
| |
| size_t size = refs.size(); |
| |
| do { |
| refs.resize(size); |
| |
| ssize_t ret = fn(refs.size(), refs.data()); |
| if (ret < 0) { |
| return false; |
| } |
| |
| size = ret; |
| } while (size > refs.size()); |
| |
| refs.resize(size); |
| return true; |
| } |
| |
| bool BinderReferences(allocator::vector<uintptr_t>& refs) { |
| refs.clear(); |
| |
| allocator::vector<uintptr_t> binder_refs{refs.get_allocator()}; |
| if (BinderReferencesToVector(refs, getBinderKernelReferences)) { |
| refs.insert(refs.end(), binder_refs.begin(), binder_refs.end()); |
| } else { |
| MEM_ALOGE("getBinderKernelReferences failed"); |
| } |
| |
| allocator::vector<uintptr_t> hwbinder_refs{refs.get_allocator()}; |
| if (BinderReferencesToVector(hwbinder_refs, getHWBinderKernelReferences)) { |
| refs.insert(refs.end(), hwbinder_refs.begin(), hwbinder_refs.end()); |
| } else { |
| MEM_ALOGE("getHWBinderKernelReferences failed"); |
| } |
| |
| return true; |
| } |
| |
| } // namespace android |