1 files changed, 3 insertions, 23 deletions

diff --git a/simpleperf/event_fd.h b/simpleperf/event_fd.h
index 0b3b0e69..e4e20ce4 100644
--- a/simpleperf/event_fd.h
+++ b/simpleperf/event_fd.h
@@ -59,7 +59,6 @@ class EventFd {
   // It tells the kernel to start counting and recording events specified by
   // this file.
   bool SetEnableEvent(bool enable);
-  bool SetFilter(const std::string& filter);
 
   bool ReadCounter(PerfCounter* counter);
 
@@ -87,21 +86,6 @@ class EventFd {
   // Discard the size of the data we have read, so the kernel can reuse the space for new data.
   virtual void DiscardMmapData(size_t discard_size);
 
-  // Manage the aux buffer, which receive auxiliary data sent by the kernel.
-  // aux_buffer_size: should be power of two, and mod PAGE_SIZE is zero.
-  virtual bool CreateAuxBuffer(size_t aux_buffer_size, bool report_error);
-  bool HasAuxBuffer() const { return aux_buffer_size_ != 0; }
-  virtual void DestroyAuxBuffer();
-
-  // Get available aux data, which can appear in one or two continuous buffers.
-  // buf1: return pointer to the first buffer
-  // size1: return data size in the first buffer
-  // buf2: return pointer to the second buffer
-  // size2: return data size in the second buffer
-  // Return value: return how many bytes of aux data has been read before.
-  virtual uint64_t GetAvailableAuxData(char** buf1, size_t* size1, char** buf2, size_t* size2);
-  virtual void DiscardAuxData(size_t discard_size);
-
   // [callback] is called when there is data available in the mapped buffer.
   virtual bool StartPolling(IOEventLoop& loop, const std::function<bool()>& callback);
   virtual bool StopPolling();
@@ -134,14 +118,10 @@ class EventFd {
 
   void* mmap_addr_;
   size_t mmap_len_;
-  // the first page of mapped area, whose content can be changed by the kernel at any time
-  volatile perf_event_mmap_page* mmap_metadata_page_;
-  // starting from the second page of mapped area, containing records written by the kernel
-  char* mmap_data_buffer_;
+  perf_event_mmap_page* mmap_metadata_page_;  // The first page of mmap_area.
+  char* mmap_data_buffer_;  // Starting from the second page of mmap_area,
+                            // containing records written by then kernel.
   size_t mmap_data_buffer_size_;
-  // receiving auxiliary data (like instruction tracing data generated by etm) from the kernel
-  char* aux_buffer_ = nullptr;
-  size_t aux_buffer_size_ = 0;
 
   IOEventRef ioevent_ref_;