1*ec63e07aSXin Li // Copyright 2019 Google LLC 2*ec63e07aSXin Li // 3*ec63e07aSXin Li // Licensed under the Apache License, Version 2.0 (the "License"); 4*ec63e07aSXin Li // you may not use this file except in compliance with the License. 5*ec63e07aSXin Li // You may obtain a copy of the License at 6*ec63e07aSXin Li // 7*ec63e07aSXin Li // https://www.apache.org/licenses/LICENSE-2.0 8*ec63e07aSXin Li // 9*ec63e07aSXin Li // Unless required by applicable law or agreed to in writing, software 10*ec63e07aSXin Li // distributed under the License is distributed on an "AS IS" BASIS, 11*ec63e07aSXin Li // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12*ec63e07aSXin Li // See the License for the specific language governing permissions and 13*ec63e07aSXin Li // limitations under the License. 14*ec63e07aSXin Li 15*ec63e07aSXin Li #ifndef SANDBOXED_API_EMBED_FILE_H_ 16*ec63e07aSXin Li #define SANDBOXED_API_EMBED_FILE_H_ 17*ec63e07aSXin Li 18*ec63e07aSXin Li #include "sandboxed_api/file_toc.h" 19*ec63e07aSXin Li #include "absl/base/thread_annotations.h" 20*ec63e07aSXin Li #include "absl/container/flat_hash_map.h" 21*ec63e07aSXin Li #include "absl/synchronization/mutex.h" 22*ec63e07aSXin Li 23*ec63e07aSXin Li namespace sapi { 24*ec63e07aSXin Li 25*ec63e07aSXin Li // The class provides primitives for converting FileToc structures into 26*ec63e07aSXin Li // executable files. 27*ec63e07aSXin Li class EmbedFile { 28*ec63e07aSXin Li public: 29*ec63e07aSXin Li EmbedFile(const EmbedFile&) = delete; 30*ec63e07aSXin Li EmbedFile& operator=(const EmbedFile&) = delete; 31*ec63e07aSXin Li 32*ec63e07aSXin Li // Returns the pointer to the per-process EmbedFile object. 33*ec63e07aSXin Li static EmbedFile* instance(); 34*ec63e07aSXin Li 35*ec63e07aSXin Li // Returns a file-descriptor for a given FileToc. 36*ec63e07aSXin Li int GetFdForFileToc(const FileToc* toc); 37*ec63e07aSXin Li 38*ec63e07aSXin Li // Returns a duplicated file-descriptor for a given FileToc. 39*ec63e07aSXin Li int GetDupFdForFileToc(const FileToc* toc); 40*ec63e07aSXin Li 41*ec63e07aSXin Li private: 42*ec63e07aSXin Li // Creates an executable file for a given FileToc, and return its 43*ec63e07aSXin Li // file-descriptors (-1 in case of errors). 44*ec63e07aSXin Li static int CreateFdForFileToc(const FileToc* toc); 45*ec63e07aSXin Li 46*ec63e07aSXin Li EmbedFile() = default; 47*ec63e07aSXin Li 48*ec63e07aSXin Li // List of File TOCs and corresponding file-descriptors. 49*ec63e07aSXin Li absl::flat_hash_map<const FileToc*, int> file_tocs_ 50*ec63e07aSXin Li ABSL_GUARDED_BY(file_tocs_mutex_); 51*ec63e07aSXin Li absl::Mutex file_tocs_mutex_; 52*ec63e07aSXin Li }; 53*ec63e07aSXin Li 54*ec63e07aSXin Li } // namespace sapi 55*ec63e07aSXin Li 56*ec63e07aSXin Li #endif // SANDBOXED_API_EMBED_FILE_H_ 57