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如果在 valgrind 的输出中发现错误，我想使用程序的调试版本生成输出。然而，在调试中进行数千次运行是非常耗时的。

所以我想做的是在发布模式下运行，如果发现错误中止运行并在调试中完成测试。

缺少监控输出和手动杀死进程，有更好的解决方案吗？

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4 回答 4

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You can use --db-attach=yes and --db-command= to execute specific command you want to stop your Valgrind execution. But for normal debug process, --db-command invokes gdb with child process. So you cannot stop the execution by killing the process using --db-command=kill -9 %p, because it just kills the child process, not the Valgrind itself.

If you are using Linux and has /proc file system support, you can get the parent process number in the 4th column in /proc/PID/stat. Such that you have the chance to kill the parent process to stop Valgrind.

For example,

valgrind --db-attach=yes --db-command="cat /proc/%p/stat | cut -d' ' -f4 | xargs kill -9" ./a.out

When the first error appears, you will be asked

---- Attach to debugger ? --- [Return/N/n/Y/y/C/c] ----

And when you press Y, it will try to invoke debug command. So in this case, it will get the parent process ID, which is valgrind, and send KILL signal to the process. Therefore, Valgrind shall be immediately stopped.

于 2013-05-03T08:26:44.990 回答
1

所以我想做的是在发布模式下运行，如果发现错误中止运行并在调试中完成测试。

假设您有两个可执行文件：a.out和a.out-g，并且您想使用不同的参数集运行它们，这应该适用于bash：

# Arguments to try
args=(
  "-foo"
  "-foo -bar"
  "-bar -baz"
  ...
)
for a in "${args[@]}"; do
   if valgrind -q --error-exitcode=1 \
       --db-attach=yes --db-command="kill -9 %p" ./a.out $a; then
     echo PASS: ./a.out $a
   else
     echo FAIL: ./a.out $a
     valgrind ./a.out-g $a
   fi 
done
于 2013-05-05T16:59:03.900 回答
1

--db-attach=yes论据不存在了。

当前使用是通过vgdb二进制调解的：

  1. 使用 valgrind 启动程序：

valgrind --vgdb=yes --vgdb-error=0 my_prog

它显示下一步要做什么：

==2466== Memcheck, a memory error detector
==2466== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==2466== Using Valgrind-3.14.0 and LibVEX; rerun with -h for copyright info
==2466== Command: ./my_prog
==2466== 
==2466== (action at startup) vgdb me ... 
==2466== 
==2466== TO DEBUG THIS PROCESS USING GDB: start GDB like this
==2466==   /path/to/gdb ./my_prog
==2466== and then give GDB the following command
==2466==   target remote | /usr/bin/vgdb --pid=2466
  1. 所以你启动另一个终端并使用你的二进制文件运行 gdb

gdb ~/Sources/my_prog

  1. 并附加到停止的进程 2466：

(gdb) target remote | /usr/bin/vgdb --pid=2604

于 2020-05-03T10:54:09.483 回答
0

您可以使用

valgrind --gen-suppressions=no|yes|all

就目前而言 - 它用于抑制，但我相信它会满足您的需求。

于 2013-05-02T18:55:59.577 回答