Fix ptrace log on i386 and include return value

Patch by Matthew Gardiner

llvm-svn: 202036
diff --git a/lldb/source/Plugins/Process/Linux/ProcessMonitor.cpp b/lldb/source/Plugins/Process/Linux/ProcessMonitor.cpp
index 51d0d94..0591a0d 100644
--- a/lldb/source/Plugins/Process/Linux/ProcessMonitor.cpp
+++ b/lldb/source/Plugins/Process/Linux/ProcessMonitor.cpp
@@ -164,10 +164,6 @@
 
     Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_PTRACE));
 
-    if (log)
-        log->Printf("ptrace(%s, %lu, %p, %p, %zu) called from file %s line %d",
-                    reqName, pid, addr, data, data_size, file, line);
-
     PtraceDisplayBytes(req, data, data_size);
 
     errno = 0;
@@ -176,6 +172,10 @@
     else
         result = ptrace(static_cast<__ptrace_request>(req), pid, addr, data);
 
+    if (log)
+        log->Printf("ptrace(%s, %" PRIu64 ", %p, %p, %zu)=%lX called from file %s line %d",
+                    reqName, pid, addr, data, data_size, result, file, line);
+
     PtraceDisplayBytes(req, data, data_size);
 
     if (log && errno != 0)