commit 1072f917cfa36ff905c31122a3cd99224e305932
author Christopher Ferris <cferris@google.com> Fri Oct 31 21:34:38 2014 -0700
committer Christopher Ferris <cferris@google.com> Mon Nov 03 11:26:33 2014 -0800
tree d3891827ac393205351b6230e0d2b182ce5e3eae
parent cb8c583d493a98cd1499c64e7c68f3ac37ebb7cd

Fix debuggerd issues.

- Fix a problem where a tid exits before the attach completes, and it
  causes debuggerd to self terminate.
- Fix a problem where sibling tid dumps do not properly wait for the tid
  to get signalled.

Bug: 17800180
Bug: 12567315

(cherry picked from commit 84ddb34a3af77dbe490aaa07b738bbfd7109d5ba)

Change-Id: I45e33865614d4c96f4a89cf117398666b556d500

debuggerd/backtrace.cpp

diff --git a/debuggerd/backtrace.cpp b/debuggerd/backtrace.cpp
index c4a2143..e7919e9 100644
--- a/debuggerd/backtrace.cpp
+++ b/debuggerd/backtrace.cpp
@@ -88,7 +88,9 @@
     return;
   }
 
-  wait_for_stop(tid, total_sleep_time_usec);
+  if (!attached && wait_for_sigstop(tid, total_sleep_time_usec, detach_failed) == -1) {
+    return;
+  }
 
   UniquePtr<Backtrace> backtrace(Backtrace::Create(tid, BACKTRACE_CURRENT_THREAD));
   if (backtrace->Unwind(0)) {