[D-runtime] [D-Programming-Language/druntime] 7ec652: simplify handling of thread starts and GC suspend

[GitHub via D-runtime]

  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/druntime
  Commit: 7ec6520adc92c4fcdef003efb1c348ec5d78f217
      https://github.com/D-Programming-Language/druntime/commit/7ec6520adc92c4fcdef003efb1c348ec5d78f217
  Author: Martin Nowak <code at dawg.eu>
  Date:   2015-10-31 (Sat, 31 Oct 2015)

  Changed paths:
    M src/core/thread.d

  Log Message:
  -----------
  simplify handling of thread starts and GC suspend

- only keep threads in global thread list while they are running
  this directly avoids any issues with signals delivered during
  thread startup
- add an aboutToStart array to keep track of just spawned threads
  this is needed so that thread_joinAll doesn't miss a thread
  also the windows dll_attach_thread code looks up a just spawned thread
- remove all the misleading comments
- remove all the cargo cult handling of situations that can no longer
  occur, e.g. suspendDepth being set while adding a thread


  Commit: e226ff2bd26b1941ddadfa0b30ca4f162901ab13
      https://github.com/D-Programming-Language/druntime/commit/e226ff2bd26b1941ddadfa0b30ca4f162901ab13
  Author: Martin Nowak <code at dawg.eu>
  Date:   2015-10-31 (Sat, 31 Oct 2015)

  Changed paths:
    M src/core/thread.d

  Log Message:
  -----------
  fix Issue 15270 - use TLS to store Thread.getThis

- as signals are no longer send during thread startup we can use
  a TLS variable to store Thread.getThis()
- make sure to set the variable (and probably trigger lazy TLS
  allocation) before adding the Thread to the global list


  Commit: 20f035005db31801ac53bb60a5a12a8bd70d534d
      https://github.com/D-Programming-Language/druntime/commit/20f035005db31801ac53bb60a5a12a8bd70d534d
  Author: Martin Nowak <code at dawg.eu>
  Date:   2015-10-31 (Sat, 31 Oct 2015)

  Changed paths:
    M src/core/thread.d

  Log Message:
  -----------
  fix race condition on m_addr

- between pthread_create(&m_addr) and reading m_addr to
  asserting isRunning when adding the newly created thread
- this race existed before but didn't manifest b/c the thread was added
  by the starting thread (after pthread_create) returned
- check isRunning after acquiring slock to ensure pthread_create already
  returned


  Commit: c2c255ce0be5deacd2df61df5135769727983173
      https://github.com/D-Programming-Language/druntime/commit/c2c255ce0be5deacd2df61df5135769727983173
  Author: David Nadlinger <code at klickverbot.at>
  Date:   2015-10-31 (Sat, 31 Oct 2015)

  Changed paths:
    M src/core/thread.d

  Log Message:
  -----------
  Merge pull request #1422 from MartinNowak/fix15670

fix Issue 15270 - use TLS to store Thread.getThis


Compare: https://github.com/D-Programming-Language/druntime/compare/713aa0568a0b...c2c255ce0be5