Implement trampoline and handler for typed xray event tracing.

Summary:
Compiler-rt support first before defining the __xray_typedevent() lowering in
llvm. I'm looking for some early feedback before I touch much more code.

Reviewers: dberris

Subscribers: delcypher, llvm-commits, #sanitizers

Differential Revision: https://reviews.llvm.org/D43668

llvm-svn: 330218

1 files changed, 13 insertions, 1 deletions

diff --git a/compiler-rt/include/xray/xray_interface.h b/compiler-rt/include/xray/xray_interface.h
index d08039a67fa..ba4c0e81269 100644
--- a/compiler-rt/include/xray/xray_interface.h
+++ b/compiler-rt/include/xray/xray_interface.h
@@ -27,6 +27,7 @@ enum XRayEntryType {
   TAIL = 2,
   LOG_ARGS_ENTRY = 3,
   CUSTOM_EVENT = 4,
+  TYPED_EVENT = 5,
 };
 
 /// Provide a function to invoke for when instrumentation points are hit. This
@@ -68,12 +69,23 @@ extern int __xray_set_handler_arg1(void (*entry)(int32_t, XRayEntryType,
 extern int __xray_remove_handler_arg1();
 
 /// Provide a function to invoke when XRay encounters a custom event.
-extern int __xray_set_customevent_handler(void (*entry)(void*, std::size_t));
+extern int __xray_set_customevent_handler(void (*entry)(void *, std::size_t));
 
 /// This removes whatever the currently provided custom event handler is.
 /// Returns 1 on success, 0 on error.
 extern int __xray_remove_customevent_handler();
 
+/// Set a handler for xray typed event logging. The first parameter is a type
+/// identifier, the second is a payload, and the third is the payload size.
+extern int __xray_set_typedevent_handler(void (*entry)(uint16_t, const void *,
+                                                       std::size_t));
+
+/// Removes the currently set typed event handler.
+/// Returns 1 on success, 0 on error.
+extern int __xray_remove_typedevent_handler();
+
+extern uint16_t __xray_register_event_type(const char *event_type);
+
 enum XRayPatchingStatus {
   NOT_INITIALIZED = 0,
   SUCCESS = 1,