From 1c993b76bf00c8ee39335092ccf89c259cc5c9cd Mon Sep 17 00:00:00 2001
From: Florian Mayer <fmayer@google.com>
Date: Mon, 28 Jan 2019 17:10:08 +0000
Subject: [PATCH] Allow to move frames out of Unwinder.

This saves a copy for every unwind we do in heapprofd.

Change-Id: Ife7aa1ce68831729d96ccd4c3e54ca531f98b6bc
---
 libunwindstack/include/unwindstack/Unwinder.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libunwindstack/include/unwindstack/Unwinder.h b/libunwindstack/include/unwindstack/Unwinder.h
index ab239c1f1..dff043bc1 100644
--- a/libunwindstack/include/unwindstack/Unwinder.h
+++ b/libunwindstack/include/unwindstack/Unwinder.h
@@ -81,6 +81,12 @@ class Unwinder {
 
   const std::vector<FrameData>& frames() { return frames_; }
 
+  std::vector<FrameData> ConsumeFrames() {
+    std::vector<FrameData> frames = std::move(frames_);
+    frames_.clear();
+    return frames;
+  }
+
   std::string FormatFrame(size_t frame_num);
   static std::string FormatFrame(const FrameData& frame, bool is32bit);