Valgrind massif produces no profile output for 7-Zip

I want to use valgrind massif to figure out the heap memory used by 7-Zip. When I run massif on 7-Zip, it produces no output. Here's the command.

valgrind --tool=massif /usr/bin/7z a filename.开发者_StackOverflow社区7z filename

I would expect an output file named massif.out.pid within the current directory but no such output is produced. I should add that, using massif on other compression tools like gzip, bzip2, compress, etc. produces a massif.out.pid file.

I also used valgrind -v and there is no helpful information there either.

Any thoughts on why this doesn't work for 7-Zip?

---

/usr/bin/7z is a wrapper script.

#! /bin/sh
exec /usr/lib/p7zip/7z "$@"

Try running

valgrind --tool=massif /usr/lib/p7zip/7z a filename.7z filename

instead.