From 6a2f62cbd30f07c3fdc5981b887df75ee431a38e Mon Sep 17 00:00:00 2001
From: Todd Fiala <todd.fiala@gmail.com>
Date: Mon, 8 Sep 2014 15:57:14 +0000
Subject: [PATCH] Linux/FreeBSD local debugging: allow redirection to pts for
 POSIX process.

See http://reviews.llvm.org/D5135 for more details.

Change by Zephyr Zhao.

llvm-svn: 217382
---
 .../Plugins/Process/POSIX/ProcessPOSIX.cpp       | 16 +++++++++-------
 lldb/source/Plugins/Process/POSIX/ProcessPOSIX.h |  3 ++-
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp b/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp
index f340631c7d07..c930a1881cd5 100644
--- a/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp
+++ b/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp
@@ -176,9 +176,9 @@ ProcessPOSIX::WillLaunch(Module* module)
 }
 
 const char *
-ProcessPOSIX::GetFilePath(const lldb_private::FileAction *file_action, const char *default_path)
+ProcessPOSIX::GetFilePath(const lldb_private::FileAction *file_action, const char *default_path,
+                          const char *dbg_pts_path)
 {
-    const char *pts_name = "/dev/pts/";
     const char *path = NULL;
 
     if (file_action)
@@ -190,11 +190,11 @@ ProcessPOSIX::GetFilePath(const lldb_private::FileAction *file_action, const cha
             // (/dev/pts). If so, convert to using a different default path
             // instead to redirect I/O to the debugger console. This should
             //  also handle user overrides to /dev/null or a different file.
-            if (!path || ::strncmp(path, pts_name, ::strlen(pts_name)) == 0)
+            if (!path || (dbg_pts_path &&
+                          ::strncmp(path, dbg_pts_path, ::strlen(dbg_pts_path)) == 0))
                 path = default_path;
         }
     }
-
     return path;
 }
 
@@ -224,14 +224,16 @@ ProcessPOSIX::DoLaunch (Module *module,
     const char *stdout_path = NULL;
     const char *stderr_path = NULL;
 
+    const char * dbg_pts_path = launch_info.GetPTY().GetSlaveName(NULL,0);
+
     file_action = launch_info.GetFileActionForFD (STDIN_FILENO);
-    stdin_path = GetFilePath(file_action, stdin_path);
+    stdin_path = GetFilePath(file_action, stdin_path, dbg_pts_path);
 
     file_action = launch_info.GetFileActionForFD (STDOUT_FILENO);
-    stdout_path = GetFilePath(file_action, stdout_path);
+    stdout_path = GetFilePath(file_action, stdout_path, dbg_pts_path);
 
     file_action = launch_info.GetFileActionForFD (STDERR_FILENO);
-    stderr_path = GetFilePath(file_action, stderr_path);
+    stderr_path = GetFilePath(file_action, stderr_path, dbg_pts_path);
 
     m_monitor = new ProcessMonitor (this, 
                                     module,
diff --git a/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.h b/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.h
index 033accf17f29..d8825ed06b6b 100644
--- a/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.h
+++ b/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.h
@@ -154,7 +154,8 @@ public:
     ProcessMonitor &
     GetMonitor() { assert(m_monitor); return *m_monitor; }
 
-    const char *GetFilePath(const lldb_private::FileAction *file_action, const char *default_path);
+    const char *GetFilePath(const lldb_private::FileAction *file_action, const char *default_path,
+                            const char *dbg_pts_path);
 
     /// Stops all threads in the process.
     /// The \p stop_tid parameter indicates the thread which initiated the stop.