message: Back out "Improve multi-thread assertion failures"
  Summary:
  Original commit changeset:
  As per discussion with agampe backing this out temporarily until we can figure out a way to run tests for Mariana Trench in parallel.
diff: #include "Debug.h"
  -#include <atomic>
  #include <exception>
  #include <fstream>
  #include <iomanip>
  #include <unistd.h>
  #endif
  -#ifdef __linux__
  -#include <sys/syscall.h>
  -#include <sys/types.h>
  -#include <unistd.h>
  -#endif
  -
  #include <boost/algorithm/string.hpp>
  #include <boost/exception/all.hpp>
  #ifdef __APPLE__
  @@ -87,11 +80,6 @@ namespace {
  using traced =
  boost::error_info<struct tag_stacktrace, boost::stacktrace::stacktrace>;
  -#ifdef __linux__
  -std::atomic<pid_t> g_aborting{0};
  -pid_t get_tid() { return syscall(SYS_gettid); }
  -#endif
  -
  } // namespace
  void assert_fail(const char* expr,
  @@ -109,31 +97,10 @@ void assert_fail(const char* expr,
  msg += v_format2string(fmt, ap);
  va_end(ap);
  -
  - bool do_throw;
  -#ifdef __linux__
  - pid_t cur = get_tid();
  - pid_t expected = 0;
  - do_throw = g_aborting.compare_exchange_strong(expected, cur);
  - if (!do_throw) {
  - do_throw = expected == cur;
  - }
  -#else
  - do_throw = true;
  -#endif
  -
  - if (do_throw) {
  throw boost::enable_error_info(RedexException(type, msg))
  << traced(boost::stacktrace::stacktrace());
  }
  - // Another thread already threw. Avoid "terminate called recursively."
  - // Infinite loop.
  - for (;;) {
  - sleep(1000);
  - }
  -}
  -
  void print_stack_trace(std::ostream& os, const std::exception& e) {
  const boost::stacktrace::stacktrace* st = boost::get_error_info<traced>(e);
  if (st) {
  