1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_PNACL_TRANSLATE_THREAD_H_ 6 #define NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_PNACL_TRANSLATE_THREAD_H_ 7 8 #include <deque> 9 #include <vector> 10 11 #include "native_client/src/include/nacl_macros.h" 12 #include "native_client/src/include/nacl_scoped_ptr.h" 13 #include "native_client/src/include/nacl_string.h" 14 #include "native_client/src/shared/platform/nacl_threads.h" 15 #include "native_client/src/shared/platform/nacl_sync_checked.h" 16 17 #include "ppapi/cpp/completion_callback.h" 18 19 #include "ppapi/native_client/src/trusted/plugin/plugin_error.h" 20 #include "ppapi/native_client/src/trusted/plugin/service_runtime.h" 21 22 struct PP_PNaClOptions; 23 24 namespace nacl { 25 class DescWrapper; 26 } 27 28 29 namespace plugin { 30 31 class NaClSubprocess; 32 class Plugin; 33 class PnaclCoordinator; 34 class PnaclResources; 35 class TempFile; 36 37 class PnaclTranslateThread { 38 public: 39 PnaclTranslateThread(); 40 ~PnaclTranslateThread(); 41 42 // Start the translation process. It will continue to run and consume data 43 // as it is passed in with PutBytes. 44 void RunTranslate(const pp::CompletionCallback& finish_callback, 45 const std::vector<TempFile*>* obj_files, 46 TempFile* nexe_file, 47 nacl::DescWrapper* invalid_desc_wrapper, 48 ErrorInfo* error_info, 49 PnaclResources* resources, 50 PP_PNaClOptions* pnacl_options, 51 const nacl::string &architecture_attributes, 52 PnaclCoordinator* coordinator, 53 Plugin* plugin); 54 55 // Kill the llc and/or ld subprocesses. This happens by closing the command 56 // channel on the plugin side, which causes the trusted code in the nexe to 57 // exit, which will cause any pending SRPCs to error. Because this is called 58 // on the main thread, the translation thread must not use the subprocess 59 // objects without the lock, other than InvokeSrpcMethod, which does not 60 // race with service runtime shutdown. 61 void AbortSubprocesses(); 62 63 // Send bitcode bytes to the translator. Called from the main thread. 64 void PutBytes(std::vector<char>* data, int count); 65 GetCompileTime()66 int64_t GetCompileTime() const { return compile_time_; } 67 68 private: 69 // Helper thread entry point for translation. Takes a pointer to 70 // PnaclTranslateThread and calls DoTranslate(). 71 static void WINAPI DoTranslateThread(void* arg); 72 // Runs the streaming translation. Called from the helper thread. 73 void DoTranslate() ; 74 // Signal that Pnacl translation failed, from the translation thread only. 75 void TranslateFailed(PP_NaClError err_code, 76 const nacl::string& error_string); 77 // Run the LD subprocess, returning true on success. 78 // On failure, it returns false and runs the callback. 79 bool RunLdSubprocess(); 80 81 82 // Callback to run when tasks are completed or an error has occurred. 83 pp::CompletionCallback report_translate_finished_; 84 85 nacl::scoped_ptr<NaClThread> translate_thread_; 86 87 // Used to guard llc_subprocess and ld_subprocess 88 struct NaClMutex subprocess_mu_; 89 nacl::scoped_ptr<NaClSubprocess> llc_subprocess_; 90 nacl::scoped_ptr<NaClSubprocess> ld_subprocess_; 91 // Used to ensure the subprocesses don't get shutdown more than once. 92 bool llc_subprocess_active_; 93 bool ld_subprocess_active_; 94 95 bool subprocesses_aborted_; 96 97 // Condition variable to synchronize communication with the SRPC thread. 98 // SRPC thread waits on this condvar if data_buffers_ is empty (meaning 99 // there is no bitcode to send to the translator), and the main thread 100 // appends to data_buffers_ and signals it when it receives bitcode. 101 struct NaClCondVar buffer_cond_; 102 // Mutex for buffer_cond_. 103 struct NaClMutex cond_mu_; 104 // Data buffers from FileDownloader are enqueued here to pass from the 105 // main thread to the SRPC thread. Protected by cond_mu_ 106 std::deque<std::vector<char> > data_buffers_; 107 // Whether all data has been downloaded and copied to translation thread. 108 // Associated with buffer_cond_ 109 bool done_; 110 111 int64_t compile_time_; 112 113 // Data about the translation files, owned by the coordinator 114 const std::vector<TempFile*>* obj_files_; 115 TempFile* nexe_file_; 116 nacl::DescWrapper* invalid_desc_wrapper_; 117 ErrorInfo* coordinator_error_info_; 118 PnaclResources* resources_; 119 PP_PNaClOptions* pnacl_options_; 120 nacl::string architecture_attributes_; 121 PnaclCoordinator* coordinator_; 122 Plugin* plugin_; 123 private: 124 NACL_DISALLOW_COPY_AND_ASSIGN(PnaclTranslateThread); 125 }; 126 127 } 128 #endif // NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_PNACL_TRANSLATE_THREAD_H_ 129