PointCloudLibrary/pcl

Poisson reconstruction in parallel threads segfaults

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#1,845 建立於 2017年3月16日

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 (7 留言) (1 反應) (0 負責人)C++ (9,023 star) (4,506 fork)batch import
help wantedkind: bugkind: todomodule: surface

描述

Your Environment

  • Operating System and version: Ubuntu 16.10
  • Compiler: gcc 6.2
  • PCL Version: 1.8 as packaged for Ubuntu

Expected Behavior

Two threads should be able to create two different instances of pcl::Poisson and run them on two different input clouds at the same time.

Current Behavior

Segfault

Code to Reproduce

http://pastebin.com/yJrpcpTL

貢獻者指南

技術棧
cpp
領域
backend
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
5
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
over 1 week
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
C++multi threadingPCL basics
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
20
研究方向
The issue reports a segfault when creating two separate pcl::Poisson instances in parallel threads. The pastebin code demonstrates the crash. Likely cause is non thread safe global or static variables in the Poisson reconstruction algorithm. Investigate the source files in pcl/surface/include/pcl/surface/poisson.hpp and related implementations. Check for mutable global state or unsynchronized access to shared resources. A fix would involve making the Poisson class reentrant, perhaps by moving global state to instance variables or adding mutex locks.