1 files changed, 0 insertions, 227 deletions
diff --git a/libbacktrace/BacktraceThread.cpp b/libbacktrace/BacktraceThread.cpp
deleted file mode 100644
index 439cc3bde..000000000
--- a/libbacktrace/BacktraceThread.cpp
+++ /dev/null
@@ -1,227 +0,0 @@
-/*
- * Copyright (C) 2013 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 <errno.h>
-#include <inttypes.h>
-#include <limits.h>
-#include <pthread.h>
-#include <signal.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/syscall.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <ucontext.h>
-#include <unistd.h>
-
-#include <cutils/atomic.h>
-
-#include "BacktraceLog.h"
-#include "BacktraceThread.h"
-#include "thread_utils.h"
-
-//-------------------------------------------------------------------------
-// ThreadEntry implementation.
-//-------------------------------------------------------------------------
-ThreadEntry* ThreadEntry::list_ = NULL;
-pthread_mutex_t ThreadEntry::list_mutex_ = PTHREAD_MUTEX_INITIALIZER;
-
-// Assumes that ThreadEntry::list_mutex_ has already been locked before
-// creating a ThreadEntry object.
-ThreadEntry::ThreadEntry(pid_t pid, pid_t tid)
-    : pid_(pid), tid_(tid), ref_count_(1), mutex_(PTHREAD_MUTEX_INITIALIZER),
-      wait_mutex_(PTHREAD_MUTEX_INITIALIZER), wait_value_(0),
-      next_(ThreadEntry::list_), prev_(NULL) {
-  pthread_condattr_t attr;
-  pthread_condattr_init(&attr);
-  pthread_condattr_setclock(&attr, CLOCK_MONOTONIC);
-  pthread_cond_init(&wait_cond_, &attr);
-
-  // Add ourselves to the list.
-  if (ThreadEntry::list_) {
-    ThreadEntry::list_->prev_ = this;
-  }
-  ThreadEntry::list_ = this;
-}
-
-ThreadEntry* ThreadEntry::Get(pid_t pid, pid_t tid, bool create) {
-  pthread_mutex_lock(&ThreadEntry::list_mutex_);
-  ThreadEntry* entry = list_;
-  while (entry != NULL) {
-    if (entry->Match(pid, tid)) {
-      break;
-    }
-    entry = entry->next_;
-  }
-
-  if (!entry) {
-    if (create) {
-      entry = new ThreadEntry(pid, tid);
-    }
-  } else {
-    entry->ref_count_++;
-  }
-  pthread_mutex_unlock(&ThreadEntry::list_mutex_);
-
-  return entry;
-}
-
-void ThreadEntry::Remove(ThreadEntry* entry) {
-  pthread_mutex_unlock(&entry->mutex_);
-
-  pthread_mutex_lock(&ThreadEntry::list_mutex_);
-  if (--entry->ref_count_ == 0) {
-    delete entry;
-  }
-  pthread_mutex_unlock(&ThreadEntry::list_mutex_);
-}
-
-// Assumes that ThreadEntry::list_mutex_ has already been locked before
-// deleting a ThreadEntry object.
-ThreadEntry::~ThreadEntry() {
-  if (list_ == this) {
-    list_ = next_;
-  } else {
-    if (next_) {
-      next_->prev_ = prev_;
-    }
-    prev_->next_ = next_;
-  }
-
-  next_ = NULL;
-  prev_ = NULL;
-
-  pthread_cond_destroy(&wait_cond_);
-}
-
-void ThreadEntry::Wait(int value) {
-  timespec ts;
-  if (clock_gettime(CLOCK_MONOTONIC, &ts) == -1) {
-    BACK_LOGW("clock_gettime failed: %s", strerror(errno));
-    abort();
-  }
-  ts.tv_sec += 10;
-
-  pthread_mutex_lock(&wait_mutex_);
-  while (wait_value_ != value) {
-    int ret = pthread_cond_timedwait(&wait_cond_, &wait_mutex_, &ts);
-    if (ret != 0) {
-      BACK_LOGW("pthread_cond_timedwait failed: %s", strerror(ret));
-      break;
-    }
-  }
-  pthread_mutex_unlock(&wait_mutex_);
-}
-
-void ThreadEntry::Wake() {
-  pthread_mutex_lock(&wait_mutex_);
-  wait_value_++;
-  pthread_mutex_unlock(&wait_mutex_);
-
-  pthread_cond_signal(&wait_cond_);
-}
-
-void ThreadEntry::CopyUcontextFromSigcontext(void* sigcontext) {
-  ucontext_t* ucontext = reinterpret_cast<ucontext_t*>(sigcontext);
-  // The only thing the unwinder cares about is the mcontext data.
-  memcpy(&ucontext_.uc_mcontext, &ucontext->uc_mcontext, sizeof(ucontext->uc_mcontext));
-}
-
-//-------------------------------------------------------------------------
-// BacktraceThread functions.
-//-------------------------------------------------------------------------
-static pthread_mutex_t g_sigaction_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-static void SignalHandler(int, siginfo_t*, void* sigcontext) {
-  ThreadEntry* entry = ThreadEntry::Get(getpid(), gettid(), false);
-  if (!entry) {
-    BACK_LOGW("Unable to find pid %d tid %d information", getpid(), gettid());
-    return;
-  }
-
-  entry->CopyUcontextFromSigcontext(sigcontext);
-
-  // Indicate the ucontext is now valid.
-  entry->Wake();
-
-  // Pause the thread until the unwind is complete. This avoids having
-  // the thread run ahead causing problems.
-  entry->Wait(2);
-
-  ThreadEntry::Remove(entry);
-}
-
-BacktraceThread::BacktraceThread(BacktraceImpl* impl, pid_t tid, BacktraceMap* map)
-    : BacktraceCurrent(impl, map) {
-  tid_ = tid;
-}
-
-BacktraceThread::~BacktraceThread() {
-}
-
-bool BacktraceThread::Unwind(size_t num_ignore_frames, ucontext_t* ucontext) {
-  if (ucontext) {
-    // Unwind using an already existing ucontext.
-    return impl_->Unwind(num_ignore_frames, ucontext);
-  }
-
-  // Prevent multiple threads trying to set the trigger action on different
-  // threads at the same time.
-  if (pthread_mutex_lock(&g_sigaction_mutex) < 0) {
-    BACK_LOGW("sigaction failed: %s", strerror(errno));
-    return false;
-  }
-
-  ThreadEntry* entry = ThreadEntry::Get(Pid(), Tid());
-  entry->Lock();
-
-  struct sigaction act, oldact;
-  memset(&act, 0, sizeof(act));
-  act.sa_sigaction = SignalHandler;
-  act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
-  sigemptyset(&act.sa_mask);
-  if (sigaction(THREAD_SIGNAL, &act, &oldact) != 0) {
-    BACK_LOGW("sigaction failed %s", strerror(errno));
-    entry->Unlock();
-    ThreadEntry::Remove(entry);
-    pthread_mutex_unlock(&g_sigaction_mutex);
-    return false;
-  }
-
-  if (tgkill(Pid(), Tid(), THREAD_SIGNAL) != 0) {
-    BACK_LOGW("tgkill %d failed: %s", Tid(), strerror(errno));
-    sigaction(THREAD_SIGNAL, &oldact, NULL);
-    entry->Unlock();
-    ThreadEntry::Remove(entry);
-    pthread_mutex_unlock(&g_sigaction_mutex);
-    return false;
-  }
-
-  // Wait for the thread to get the ucontext.
-  entry->Wait(1);
-
-  // After the thread has received the signal, allow other unwinders to
-  // continue.
-  sigaction(THREAD_SIGNAL, &oldact, NULL);
-  pthread_mutex_unlock(&g_sigaction_mutex);
-
-  bool unwind_done = impl_->Unwind(num_ignore_frames, entry->GetUcontext());
-
-  // Tell the signal handler to exit and release the entry.
-  entry->Wake();
-
-  return unwind_done;
-}