Christopher Ferris | 17e91d4 | 2013-10-21 13:30:52 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 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 _LIBBACKTRACE_BACKTRACE_THREAD_H |
| 18 | #define _LIBBACKTRACE_BACKTRACE_THREAD_H |
| 19 | |
| 20 | #include <inttypes.h> |
Christopher Ferris | a2efd3a | 2014-05-06 15:23:59 -0700 | [diff] [blame] | 21 | #include <pthread.h> |
Christopher Ferris | aa63d9f | 2014-04-29 09:35:30 -0700 | [diff] [blame] | 22 | #include <signal.h> |
Christopher Ferris | a2efd3a | 2014-05-06 15:23:59 -0700 | [diff] [blame] | 23 | #include <string.h> |
Christopher Ferris | 17e91d4 | 2013-10-21 13:30:52 -0700 | [diff] [blame] | 24 | #include <sys/types.h> |
Christopher Ferris | a2efd3a | 2014-05-06 15:23:59 -0700 | [diff] [blame] | 25 | #include <ucontext.h> |
Christopher Ferris | 17e91d4 | 2013-10-21 13:30:52 -0700 | [diff] [blame] | 26 | |
Christopher Ferris | df29061 | 2014-01-22 19:21:07 -0800 | [diff] [blame] | 27 | #include "BacktraceImpl.h" |
Christopher Ferris | 17e91d4 | 2013-10-21 13:30:52 -0700 | [diff] [blame] | 28 | |
Christopher Ferris | aa63d9f | 2014-04-29 09:35:30 -0700 | [diff] [blame] | 29 | // The signal used to cause a thread to dump the stack. |
| 30 | #if defined(__GLIBC__) |
| 31 | // GLIBC reserves __SIGRTMIN signals, so use SIGRTMIN to avoid errors. |
| 32 | #define THREAD_SIGNAL SIGRTMIN |
| 33 | #else |
| 34 | #define THREAD_SIGNAL (__SIGRTMIN+1) |
| 35 | #endif |
| 36 | |
Christopher Ferris | a2efd3a | 2014-05-06 15:23:59 -0700 | [diff] [blame] | 37 | class ThreadEntry { |
| 38 | public: |
| 39 | static ThreadEntry* Get(pid_t pid, pid_t tid, bool create = true); |
Christopher Ferris | 17e91d4 | 2013-10-21 13:30:52 -0700 | [diff] [blame] | 40 | |
Christopher Ferris | a2efd3a | 2014-05-06 15:23:59 -0700 | [diff] [blame] | 41 | static void Remove(ThreadEntry* entry); |
| 42 | |
Christopher Ferris | a2efd3a | 2014-05-06 15:23:59 -0700 | [diff] [blame] | 43 | void Wake(); |
| 44 | |
| 45 | void Wait(int); |
| 46 | |
Christopher Ferris | e484607 | 2014-05-23 14:46:36 -0700 | [diff] [blame] | 47 | void CopyUcontextFromSigcontext(void*); |
| 48 | |
Christopher Ferris | a2efd3a | 2014-05-06 15:23:59 -0700 | [diff] [blame] | 49 | inline void Lock() { |
| 50 | pthread_mutex_lock(&mutex_); |
Christopher Ferris | 3cdbfdc | 2014-11-08 15:57:11 -0800 | [diff] [blame] | 51 | |
| 52 | // Always reset the wait value since this could be the first or nth |
| 53 | // time this entry is locked. |
| 54 | wait_value_ = 0; |
Christopher Ferris | a2efd3a | 2014-05-06 15:23:59 -0700 | [diff] [blame] | 55 | } |
| 56 | |
| 57 | inline void Unlock() { |
| 58 | pthread_mutex_unlock(&mutex_); |
| 59 | } |
| 60 | |
| 61 | inline ucontext_t* GetUcontext() { return &ucontext_; } |
| 62 | |
| 63 | private: |
| 64 | ThreadEntry(pid_t pid, pid_t tid); |
Christopher Ferris | 17e91d4 | 2013-10-21 13:30:52 -0700 | [diff] [blame] | 65 | ~ThreadEntry(); |
| 66 | |
Christopher Ferris | a2efd3a | 2014-05-06 15:23:59 -0700 | [diff] [blame] | 67 | bool Match(pid_t chk_pid, pid_t chk_tid) { return (chk_pid == pid_ && chk_tid == tid_); } |
Christopher Ferris | 17e91d4 | 2013-10-21 13:30:52 -0700 | [diff] [blame] | 68 | |
Christopher Ferris | a2efd3a | 2014-05-06 15:23:59 -0700 | [diff] [blame] | 69 | pid_t pid_; |
| 70 | pid_t tid_; |
Christopher Ferris | a2efd3a | 2014-05-06 15:23:59 -0700 | [diff] [blame] | 71 | int ref_count_; |
| 72 | pthread_mutex_t mutex_; |
Christopher Ferris | 3cdbfdc | 2014-11-08 15:57:11 -0800 | [diff] [blame] | 73 | pthread_mutex_t wait_mutex_; |
| 74 | pthread_cond_t wait_cond_; |
| 75 | int wait_value_; |
Christopher Ferris | a2efd3a | 2014-05-06 15:23:59 -0700 | [diff] [blame] | 76 | ThreadEntry* next_; |
| 77 | ThreadEntry* prev_; |
| 78 | ucontext_t ucontext_; |
Christopher Ferris | 17e91d4 | 2013-10-21 13:30:52 -0700 | [diff] [blame] | 79 | |
Christopher Ferris | a2efd3a | 2014-05-06 15:23:59 -0700 | [diff] [blame] | 80 | static ThreadEntry* list_; |
| 81 | static pthread_mutex_t list_mutex_; |
Christopher Ferris | 17e91d4 | 2013-10-21 13:30:52 -0700 | [diff] [blame] | 82 | }; |
| 83 | |
| 84 | class BacktraceThread : public BacktraceCurrent { |
| 85 | public: |
Christopher Ferris | a2efd3a | 2014-05-06 15:23:59 -0700 | [diff] [blame] | 86 | BacktraceThread(BacktraceImpl* impl, pid_t tid, BacktraceMap* map); |
Christopher Ferris | 17e91d4 | 2013-10-21 13:30:52 -0700 | [diff] [blame] | 87 | virtual ~BacktraceThread(); |
| 88 | |
Christopher Ferris | a2efd3a | 2014-05-06 15:23:59 -0700 | [diff] [blame] | 89 | virtual bool Unwind(size_t num_ignore_frames, ucontext_t* ucontext); |
Christopher Ferris | 17e91d4 | 2013-10-21 13:30:52 -0700 | [diff] [blame] | 90 | }; |
| 91 | |
| 92 | #endif // _LIBBACKTRACE_BACKTRACE_THREAD_H |