| Issue |
138855
|
| Summary |
llvm-strings excessive memory use when used in a pipe
|
| Labels |
tools:llvm-strings
|
| Assignees |
|
| Reporter |
emaste
|
As [reported in FreeBSD bugzilla](https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=286605), after FreeBSD switched from ELF Tool Chain's binary utilities to using LLVM's by default:
```
It seems the LLVM’s version isn’t able to mmap while
used in a pipe, so it copy ALL the file into memory.
Example:
$ dd if=/dev/urandom of=/tmp/test.file bs=1M count=1024
$ cat /tmp/test.file | strings > /dev/null &
Now with elftoolchain’s strings:
$ ps -o pid,command,vsz,rss | grep strings
53243 strings 12992 2556
And with LLVM’strings:
$ ps -o pid,command,vsz,rss | grep strings
41791 strings 5027836 3413864
And with our use-case, we are using strings on GB files
(like core dump), and it is now consumming all our memory.
```
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