2 files changed, 57 insertions, 0 deletions
diff --git a/include/xray/xray_log_interface.h b/include/xray/xray_log_interface.h
new file mode 100644
index 000000000..f98b33110
--- /dev/null
+++ b/include/xray/xray_log_interface.h
@@ -0,0 +1,51 @@
+//===-- xray_log_interface.h ----------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of XRay, a function call tracing system.
+//
+// APIs for installing a new logging implementation.
+//===----------------------------------------------------------------------===//
+#ifndef XRAY_XRAY_LOG_INTERFACE_H
+#define XRAY_XRAY_LOG_INTERFACE_H
+
+#include "xray/xray_interface.h"
+#include <stddef.h>
+
+extern "C" {
+
+enum XRayLogInitStatus {
+  XRAY_LOG_UNINITIALIZED = 0,
+  XRAY_LOG_INITIALIZING = 1,
+  XRAY_LOG_INITIALIZED = 2,
+  XRAY_LOG_FINALIZING = 3,
+  XRAY_LOG_FINALIZED = 4,
+};
+
+enum XRayLogFlushStatus {
+  XRAY_LOG_NOT_FLUSHING = 0,
+  XRAY_LOG_FLUSHING = 1,
+  XRAY_LOG_FLUSHED = 2,
+};
+
+struct XRayLogImpl {
+  XRayLogInitStatus (*log_init)(size_t, size_t, void *, size_t);
+  XRayLogInitStatus (*log_finalize)();
+  void (*handle_arg0)(int32_t, XRayEntryType);
+  XRayLogFlushStatus (*flush_log)();
+};
+
+void __xray_set_log_impl(XRayLogImpl Impl);
+XRayLogInitStatus __xray_log_init(size_t BufferSize, size_t MaxBuffers,
+                                  void *Args, size_t ArgsSize);
+XRayLogInitStatus __xray_log_finalize();
+XRayLogFlushStatus __xray_log_flushLog();
+
+} // extern "C"
+
+#endif // XRAY_XRAY_LOG_INTERFACE_H
diff --git a/include/xray/xray_records.h b/include/xray/xray_records.h
index 34c236b39..71637d1fe 100644
--- a/include/xray/xray_records.h
+++ b/include/xray/xray_records.h
@@ -21,6 +21,7 @@ namespace __xray {
 
 enum FileTypes {
   NAIVE_LOG = 0,
+  FDR_LOG = 1,
 };
 
 // This data structure is used to describe the contents of the file. We use this
@@ -40,6 +41,11 @@ struct alignas(32) XRayFileHeader {
 
   // The frequency by which TSC increases per-second.
   alignas(8) uint64_t CycleFrequency = 0;
+
+  // The current civiltime timestamp, as retrived from 'clock_gettime'. This
+  // allows readers of the file to determine when the file was created or
+  // written down.
+  struct timespec TS;
 } __attribute__((packed));
 
 static_assert(sizeof(XRayFileHeader) == 32, "XRayFileHeader != 32 bytes");