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[22647] Shared Memory Object Deleted When Calling system() in QNX Environment #5574

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hao47825148 opened this issue Jan 14, 2025 · 3 comments
Open
1 task done

[22647] Shared Memory Object Deleted When Calling system() in QNX Environment #5574

hao47825148 opened this issue Jan 14, 2025 · 3 comments
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need more info Issue that requires more info from contributor

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@hao47825148
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Is there an already existing issue for this?

  • I have searched the existing issues

Expected behavior

Calling the system() function within a FastDDS-based application running on a QNX environment should execute the desired system command without interfering with FastDDS's internal mechanisms. Specifically, invoking system() should not result in the deletion or corruption of FastDDS shared memory objects.

Current behavior

When the system() function is invoked within a FastDDS-based application on a QNX environment, it unexpectedly leads to the deletion of a FastDDS shared memory object. This results in the failure of DDS operations, such as the inability of subscribers to receive published data.
The issue persists even when using native FastDDS examples（Fast-DDS-2.12.2/examples/cpp/dds/HelloWorldExampleSharedMem） with minimal modifications。
ce11f8ff4e525bba2b06e237e7bfc94

Steps to reproduce

  1. Operating System: QNX localhost 7.1.0S aarch64le

  2. FastDDS Version: 2.12.2

  3. Modify the （Fast-DDS-2.12.2/examples/cpp/dds/HelloWorldExampleSharedMem/HelloWorldPublisher.cpp）Code:
    ce11f8ff4e525bba2b06e237e7bfc94

  4. Compile

  5. Run the examples publisher ：
    ./examples/cpp/dds/HelloWorldExampleSharedMem/bin/DDSHelloWorldExampleSharedMem publisher 100 1000

  6. Observe the Behavior : From the output logs, it can be seen that after the publisher has executed several cycles, a fastrtps_xxxxx shared memory object in /dev/shmem/ disappears.

Fast DDS version/commit

v2.12.2

Platform/Architecture

Other. Please specify in Additional context section.

Transport layer

Default configuration, UDPv4 & SHM

Additional context

No response

XML configuration file

No response

Relevant log output

Below are the logs captured during the issue reproduction:

[2025-01-14 16:51:38]  Publisher running 100 samples.
[2025-01-14 16:51:38]  total 4411
[2025-01-14 16:51:39]  -rw-rw-r--   2 root      root             83 Jan 01 08:00 analyzer_startup_log.txt
[2025-01-14 16:51:39]  -rw-rw-rw-   2 root      root            860 Jan 01 08:00 clockdebug_log
[2025-01-14 16:51:39]  nrw-r--r--   2 root      root        2122272 Jan 02 14:08 fastrtps_22ca76eb240aff92
[2025-01-14 16:51:39]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7400
[2025-01-14 16:51:39]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7410
[2025-01-14 16:51:39]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7411
[2025-01-14 16:51:39]  -rw-rw-r--   2 root      root            949 Jan 01 08:00 graphics.conf
[2025-01-14 16:51:39]  -rw-r--r--   3 root      root           1180 Jan 01 08:00 initial_DSP_logs.qmdl
[2025-01-14 16:51:39]  -rw-rw-r--   2 root      root            635 Jan 01 08:00 logs.txt
[2025-01-14 16:51:39]  dr-xr-xr-x   2 root      root              0 Jan 02 14:08 slogger2
[2025-01-14 16:51:39]  -rw-r--r--   3 root      root           9175 Jan 01 08:00 tracebuffer.kev
[2025-01-14 16:51:39]  CMD : ls -l /dev/shmem  ret:0
[2025-01-14 16:51:39]  total 4411
[2025-01-14 16:51:40]  -rw-rw-r--   2 root      root             83 Jan 01 08:00 analyzer_startup_log.txt
[2025-01-14 16:51:40]  -rw-rw-rw-   2 root      root            860 Jan 01 08:00 clockdebug_log
[2025-01-14 16:51:40]  nrw-r--r--   2 root      root        2122272 Jan 02 14:08 fastrtps_22ca76eb240aff92
[2025-01-14 16:51:40]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7400
[2025-01-14 16:51:40]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7410
[2025-01-14 16:51:40]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7411
[2025-01-14 16:51:40]  -rw-rw-r--   2 root      root            949 Jan 01 08:00 graphics.conf
[2025-01-14 16:51:40]  -rw-r--r--   3 root      root           1180 Jan 01 08:00 initial_DSP_logs.qmdl
[2025-01-14 16:51:40]  -rw-rw-r--   2 root      root            635 Jan 01 08:00 logs.txt
[2025-01-14 16:51:40]  dr-xr-xr-x   2 root      root              0 Jan 02 14:08 slogger2
[2025-01-14 16:51:40]  -rw-r--r--   3 root      root           9175 Jan 01 08:00 tracebuffer.kev
[2025-01-14 16:51:40]  CMD : ls -l /dev/shmem  ret:0
[2025-01-14 16:51:40]  total 4411
[2025-01-14 16:51:41]  -rw-rw-r--   2 root      root             83 Jan 01 08:00 analyzer_startup_log.txt
[2025-01-14 16:51:41]  -rw-rw-rw-   2 root      root            860 Jan 01 08:00 clockdebug_log
[2025-01-14 16:51:41]  nrw-r--r--   2 root      root        2122272 Jan 02 14:08 fastrtps_22ca76eb240aff92
[2025-01-14 16:51:41]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7400
[2025-01-14 16:51:41]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7410
[2025-01-14 16:51:41]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7411
[2025-01-14 16:51:41]  -rw-rw-r--   2 root      root            949 Jan 01 08:00 graphics.conf
[2025-01-14 16:51:41]  -rw-r--r--   3 root      root           1180 Jan 01 08:00 initial_DSP_logs.qmdl
[2025-01-14 16:51:41]  -rw-rw-r--   2 root      root            635 Jan 01 08:00 logs.txt
[2025-01-14 16:51:41]  dr-xr-xr-x   2 root      root              0 Jan 02 14:08 slogger2
[2025-01-14 16:51:41]  -rw-r--r--   3 root      root           9175 Jan 01 08:00 tracebuffer.kev
[2025-01-14 16:51:41]  CMD : ls -l /dev/shmem  ret:0
[2025-01-14 16:51:41]  total 4411
[2025-01-14 16:51:42]  -rw-rw-r--   2 root      root             83 Jan 01 08:00 analyzer_startup_log.txt
[2025-01-14 16:51:42]  -rw-rw-rw-   2 root      root            860 Jan 01 08:00 clockdebug_log
[2025-01-14 16:51:42]  nrw-r--r--   2 root      root        2122272 Jan 02 14:08 fastrtps_22ca76eb240aff92
[2025-01-14 16:51:42]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7400
[2025-01-14 16:51:42]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7410
[2025-01-14 16:51:42]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7411
[2025-01-14 16:51:42]  -rw-rw-r--   2 root      root            949 Jan 01 08:00 graphics.conf
[2025-01-14 16:51:42]  -rw-r--r--   3 root      root           1180 Jan 01 08:00 initial_DSP_logs.qmdl
[2025-01-14 16:51:42]  -rw-rw-r--   2 root      root            635 Jan 01 08:00 logs.txt
[2025-01-14 16:51:42]  dr-xr-xr-x   2 root      root              0 Jan 02 14:08 slogger2
[2025-01-14 16:51:42]  -rw-r--r--   3 root      root           9175 Jan 01 08:00 tracebuffer.kev
[2025-01-14 16:51:42]  CMD : ls -l /dev/shmem  ret:0
[2025-01-14 16:51:42]  total 4411
[2025-01-14 16:51:43]  -rw-rw-r--   2 root      root             83 Jan 01 08:00 analyzer_startup_log.txt
[2025-01-14 16:51:43]  -rw-rw-rw-   2 root      root            860 Jan 01 08:00 clockdebug_log
[2025-01-14 16:51:43]  nrw-r--r--   2 root      root        2122272 Jan 02 14:08 fastrtps_22ca76eb240aff92
[2025-01-14 16:51:43]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7400
[2025-01-14 16:51:43]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7410
[2025-01-14 16:51:43]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7411
[2025-01-14 16:51:43]  -rw-rw-r--   2 root      root            949 Jan 01 08:00 graphics.conf
[2025-01-14 16:51:43]  -rw-r--r--   3 root      root           1180 Jan 01 08:00 initial_DSP_logs.qmdl
[2025-01-14 16:51:43]  -rw-rw-r--   2 root      root            635 Jan 01 08:00 logs.txt
[2025-01-14 16:51:43]  dr-xr-xr-x   2 root      root              0 Jan 02 14:08 slogger2
[2025-01-14 16:51:43]  -rw-r--r--   3 root      root           9175 Jan 01 08:00 tracebuffer.kev
[2025-01-14 16:51:43]  CMD : ls -l /dev/shmem  ret:0
[2025-01-14 16:51:43]  total 265
[2025-01-14 16:51:44]  -rw-rw-r--   2 root      root             83 Jan 01 08:00 analyzer_startup_log.txt
[2025-01-14 16:51:44]  -rw-rw-rw-   2 root      root            860 Jan 01 08:00 clockdebug_log
[2025-01-14 16:51:44]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7400
[2025-01-14 16:51:44]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7410
[2025-01-14 16:51:44]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7411
[2025-01-14 16:51:44]  -rw-rw-r--   2 root      root            949 Jan 01 08:00 graphics.conf
[2025-01-14 16:51:44]  -rw-r--r--   3 root      root           1180 Jan 01 08:00 initial_DSP_logs.qmdl
[2025-01-14 16:51:44]  -rw-rw-r--   2 root      root            635 Jan 01 08:00 logs.txt
[2025-01-14 16:51:44]  dr-xr-xr-x   2 root      root              0 Jan 02 14:08 slogger2
[2025-01-14 16:51:44]  -rw-r--r--   3 root      root           9175 Jan 01 08:00 tracebuffer.kev
[2025-01-14 16:51:44]  CMD : ls -l /dev/shmem  ret:0
[2025-01-14 16:51:44]  total 265
[2025-01-14 16:51:45]  -rw-rw-r--   2 root      root             83 Jan 01 08:00 analyzer_startup_log.txt
[2025-01-14 16:51:45]  -rw-rw-rw-   2 root      root            860 Jan 01 08:00 clockdebug_log
[2025-01-14 16:51:45]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7400
[2025-01-14 16:51:45]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7410
[2025-01-14 16:51:45]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7411
[2025-01-14 16:51:45]  -rw-rw-r--   2 root      root            949 Jan 01 08:00 graphics.conf
[2025-01-14 16:51:45]  -rw-r--r--   3 root      root           1180 Jan 01 08:00 initial_DSP_logs.qmdl
[2025-01-14 16:51:45]  -rw-rw-r--   2 root      root            635 Jan 01 08:00 logs.txt
[2025-01-14 16:51:45]  dr-xr-xr-x   2 root      root              0 Jan 02 14:08 slogger2
[2025-01-14 16:51:45]  -rw-r--r--   3 root      root           9175 Jan 01 08:00 tracebuffer.kev
[2025-01-14 16:51:45]  CMD : ls -l /dev/shmem  ret:0
[2025-01-14 16:51:45]  total 265
[2025-01-14 16:51:46]  -rw-rw-r--   2 root      root             83 Jan 01 08:00 analyzer_startup_log.txt
[2025-01-14 16:51:46]  -rw-rw-rw-   2 root      root            860 Jan 01 08:00 clockdebug_log
[2025-01-14 16:51:46]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7400
[2025-01-14 16:51:46]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7410
[2025-01-14 16:51:46]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7411
[2025-01-14 16:51:46]  -rw-rw-r--   2 root      root            949 Jan 01 08:00 graphics.conf
[2025-01-14 16:51:46]  -rw-r--r--   3 root      root           1180 Jan 01 08:00 initial_DSP_logs.qmdl
[2025-01-14 16:51:46]  -rw-rw-r--   2 root      root            635 Jan 01 08:00 logs.txt
[2025-01-14 16:51:46]  dr-xr-xr-x   2 root      root              0 Jan 02 14:08 slogger2
[2025-01-14 16:51:46]  -rw-r--r--   3 root      root           9175 Jan 01 08:00 tracebuffer.kev
[2025-01-14 16:51:46]  CMD : ls -l /dev/shmem  ret:0
[2025-01-14 16:51:46]  total 265
[2025-01-14 16:51:47]  -rw-rw-r--   2 root      root             83 Jan 01 08:00 analyzer_startup_log.txt
[2025-01-14 16:51:47]  -rw-rw-rw-   2 root      root            860 Jan 01 08:00 clockdebug_log
[2025-01-14 16:51:47]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7400
[2025-01-14 16:51:47]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7410
[2025-01-14 16:51:47]  nrw-r--r--   2 root      root          40048 Jan 02 14:08 fastrtps_port7411
[2025-01-14 16:51:47]  -rw-rw-r--   2 root      root            949 Jan 01 08:00 graphics.conf
[2025-01-14 16:51:47]  -rw-r--r--   3 root      root           1180 Jan 01 08:00 initial_DSP_logs.qmdl
[2025-01-14 16:51:47]  -rw-rw-r--   2 root      root            635 Jan 01 08:00 logs.txt
[2025-01-14 16:51:47]  dr-xr-xr-x   2 root      root              0 Jan 02 14:08 slogger2
[2025-01-14 16:51:47]  -rw-r--r--   3 root      root           9175 Jan 01 08:00 tracebuffer.kev
[2025-01-14 16:51:47]  CMD : ls -l /dev/shmem  ret:0

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@hao47825148 hao47825148 added the triage Issue pending classification label Jan 14, 2025
@Javgilavi
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Hi @hao47825148,

To start with, could you check trying to use fastdds 2.14.x?

@Javgilavi Javgilavi added need more info Issue that requires more info from contributor and removed triage Issue pending classification labels Jan 17, 2025
@hao47825148
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I attempted testing with version 2.14.4 and encountered the same issue.

However, while compiling with the QNX toolchain, I found that QNX 7.1 does not support SCHED_BATCH and SCHED_IDLE. To address this, I made some modifications to src/cpp/utils/threading/threading_pthread.ipp (

Fast-DDS/src/cpp/utils/threading/threading_pthread.ipp

Line 98 in 90bebe3

if ((sched_class == SCHED_OTHER) ||
).

Image

I believe this modification should not cause any issues since my system defaults to SCHED_RR.

@hao47825148
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@Javgilavi

@Javgilavi Javgilavi changed the title Shared Memory Object Deleted When Calling system() in QNX Environment [22647] Shared Memory Object Deleted When Calling system() in QNX Environment Jan 20, 2025
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