I invoked valgrind using: $ valgrind nautilus and received this in the output: --17196-- WARNING: unhandled syscall: 332 --17196-- You may be able to write your own handler. --17196-- Read the file README_MISSING_SYSCALL_OR_IOCTL. --17196-- Nevertheless we consider this a bug. Please report --17196-- it at http://valgrind.org/support/bug_reports.html. I attempted to follow the steps at http://valgrind.org/docs/manual/dist.readme-missing.html, but step #1 did not give me anything to go on: $ grep 332 /usr/include/asm/unistd.h $
*** This bug has been marked as a duplicate of bug 202315 ***
Oh, and I've updated README_MISSING_SYSCALL_OR_IOCTL to suggest grepping in unistd*.h as (on amd64 at least) the system call numbers are in unistd_32.h and unistd_64.h now.