Fix signal handling for POSIX (only tested on Linux) processes in multi-threaded programs.

Also fix a related issue where if a thread exits after a thread continue, lldb would hang.

llvm-svn: 185944

1 files changed, 14 insertions, 0 deletions

diff --git a/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.h b/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.h
index 8402aad3496..a865fe26746 100644
--- a/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.h
+++ b/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.h
@@ -14,6 +14,7 @@
 
 // C++ Includes
 #include <queue>
+#include <set>
 
 // Other libraries and framework includes
 #include "lldb/Target/Process.h"
@@ -157,6 +158,11 @@ public:
     virtual void
     StopAllThreads(lldb::tid_t stop_tid);
 
+    /// Adds the thread to the list of threads for which we have received the initial stopping signal.
+    /// The \p stop_tid paramter indicates the thread which the stop happened for.
+    bool
+    AddThreadForInitialStopIfNeeded(lldb::tid_t stop_tid);
+
 protected:
     /// Target byte order.
     lldb::ByteOrder m_byte_order;
@@ -183,8 +189,16 @@ protected:
     /// Returns true if the process is stopped.
     bool IsStopped();
 
+    /// Returns true if at least one running is currently running
+    bool IsAThreadRunning();
+
     typedef std::map<lldb::addr_t, lldb::addr_t> MMapMap;
     MMapMap m_addr_to_mmap_size;
+
+    typedef std::set<lldb::tid_t> ThreadStopSet;
+    /// Every thread begins with a stop signal. This keeps track
+    /// of the threads for which we have received the stop signal.
+    ThreadStopSet m_seen_initial_stop;
 };
 
 #endif  // liblldb_MacOSXProcess_H_