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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ART_RUNTIME_RUNTIME_COMMON_H_
     18 #define ART_RUNTIME_RUNTIME_COMMON_H_
     19 
     20 // Code shared by runtime/runtime_android.cc and runtime/runtime_linux.cc.
     21 
     22 #if defined(__APPLE__)
     23 // On macOS, _XOPEN_SOURCE must be defined to access ucontext
     24 // routines, as they are considered deprecated on that platform.
     25 #define _XOPEN_SOURCE
     26 #endif
     27 
     28 #include <sys/utsname.h>
     29 #include <ucontext.h>
     30 
     31 #include <iomanip>
     32 
     33 #include "base/dumpable.h"
     34 #include "base/utils.h"
     35 #include "native_stack_dump.h"
     36 
     37 namespace art {
     38 
     39 struct Backtrace {
     40  public:
     41   explicit Backtrace(void* raw_context) : raw_context_(raw_context) {}
     42   void Dump(std::ostream& os) const {
     43     // This is a backtrace from a crash, do not skip any frames in case the
     44     // crash is in the unwinder itself.
     45     DumpNativeStack(os, GetTid(), nullptr, "\t", nullptr, raw_context_, false);
     46   }
     47  private:
     48   // Stores the context of the signal that was unexpected and will terminate the runtime. The
     49   // DumpNativeStack code will take care of casting it to the expected type. This is required
     50   // as our signal handler runs on an alternate stack.
     51   void* raw_context_;
     52 };
     53 
     54 struct OsInfo {
     55   void Dump(std::ostream& os) const {
     56     utsname info;
     57     uname(&info);
     58     // Linux 2.6.38.8-gg784 (x86_64)
     59     // Darwin 11.4.0 (x86_64)
     60     os << info.sysname << " " << info.release << " (" << info.machine << ")";
     61   }
     62 };
     63 
     64 const char* GetSignalName(int signal_number);
     65 const char* GetSignalCodeName(int signal_number, int signal_code);
     66 
     67 // Return the signal number we recognize as timeout. -1 means not active/supported.
     68 int GetTimeoutSignal();
     69 
     70 void HandleUnexpectedSignalCommon(int signal_number,
     71                                   siginfo_t* info,
     72                                   void* raw_context,
     73                                   bool handle_timeout_signal,
     74                                   bool dump_on_stderr);
     75 
     76 void InitPlatformSignalHandlersCommon(void (*newact)(int, siginfo_t*, void*),
     77                                       struct sigaction* oldact,
     78                                       bool handle_timeout_signal);
     79 
     80 }  // namespace art
     81 
     82 #endif  // ART_RUNTIME_RUNTIME_COMMON_H_
     83