Fix incomplete commit of http://llvm.org/viewvc/llvm-project?rev=147609&view=rev:

This patch combines common code from Linux and FreeBSD into
a new POSIX platform.  It also contains fixes for 64bit FreeBSD.

The patch is based on changes by Mark Peek <mp@FreeBSD.org> and
"K. Macy" <kmacy@freebsd.org> in their github repo located at
https://github.com/fbsd/lldb.

llvm-svn: 147613

1 files changed, 106 insertions, 0 deletions

diff --git a/lldb/source/Plugins/Process/POSIX/ProcessPOSIXLog.h b/lldb/source/Plugins/Process/POSIX/ProcessPOSIXLog.h
new file mode 100644
index 00000000000..5c34a88af7c
--- /dev/null
+++ b/lldb/source/Plugins/Process/POSIX/ProcessPOSIXLog.h
@@ -0,0 +1,106 @@
+//===-- ProcessLinuxLog.h -----------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_ProcessLinuxLog_h_
+#define liblldb_ProcessLinuxLog_h_
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+
+// Project includes
+#include "lldb/Core/Log.h"
+
+#define POSIX_LOG_VERBOSE                  (1u << 0)
+#define POSIX_LOG_PROCESS                  (1u << 1)
+#define POSIX_LOG_THREAD                   (1u << 2)
+#define POSIX_LOG_PACKETS                  (1u << 3)
+#define POSIX_LOG_MEMORY                   (1u << 4)    // Log memory reads/writes calls
+#define POSIX_LOG_MEMORY_DATA_SHORT        (1u << 5)    // Log short memory reads/writes bytes
+#define POSIX_LOG_MEMORY_DATA_LONG         (1u << 6)    // Log all memory reads/writes bytes
+#define POSIX_LOG_BREAKPOINTS              (1u << 7)
+#define POSIX_LOG_WATCHPOINTS              (1u << 8)
+#define POSIX_LOG_STEP                     (1u << 9)
+#define POSIX_LOG_COMM                     (1u << 10)
+#define POSIX_LOG_ASYNC                    (1u << 11)
+#define POSIX_LOG_PTRACE                   (1u << 12)
+#define POSIX_LOG_REGISTERS                (1u << 13)
+#define POSIX_LOG_ALL                      (UINT32_MAX)
+#define POSIX_LOG_DEFAULT                  POSIX_LOG_PACKETS
+
+// The size which determines "short memory reads/writes".
+#define POSIX_LOG_MEMORY_SHORT_BYTES       (4 * sizeof(ptrdiff_t))
+
+class ProcessPOSIXLog
+{
+    static int m_nestinglevel;
+    static const char *m_pluginname;
+
+public:
+    static void
+    RegisterPluginName(const char *pluginName)
+    {
+        m_pluginname = pluginName;
+    }
+
+
+    static lldb::LogSP
+    GetLogIfAllCategoriesSet(uint32_t mask = 0);
+
+    static void
+    DisableLog (lldb_private::Args &args, lldb_private::Stream *feedback_strm);
+
+    static lldb::LogSP
+    EnableLog (lldb::StreamSP &log_stream_sp, uint32_t log_options,
+               lldb_private::Args &args, lldb_private::Stream *feedback_strm);
+
+    static void
+    ListLogCategories (lldb_private::Stream *strm);
+
+    static void
+    LogIf (uint32_t mask, const char *format, ...);
+
+    // The following functions can be used to enable the client to limit
+    // logging to only the top level function calls.  This is useful for
+    // recursive functions.  FIXME: not thread safe!
+    //     Example:
+    //     void NestingFunc() {
+    //         LogSP log (ProcessLinuxLog::GetLogIfAllCategoriesSet(POSIX_LOG_ALL));
+    //         if (log)
+    //         {
+    //             ProcessLinuxLog::IncNestLevel();
+    //             if (ProcessLinuxLog::AtTopNestLevel())
+    //                 log->Print(msg);
+    //         }
+    //         NestingFunc();
+    //         if (log)
+    //             ProcessLinuxLog::DecNestLevel();
+    //     }
+
+    static bool
+    AtTopNestLevel()
+    {
+        return m_nestinglevel == 1;
+    }
+
+    static void
+    IncNestLevel()
+    {
+        ++m_nestinglevel;
+    }
+
+    static void
+    DecNestLevel()
+    {
+        --m_nestinglevel;
+        assert(m_nestinglevel >= 0);
+    }
+};
+
+#endif  // liblldb_ProcessLinuxLog_h_