Control: reassign -1 manpages-dev 6.03-2
Control: retitle -1 manpages-dev: mtrace(3): LD_PRELOAD=libc_malloc_debug.so is
needed
Control: tags -1 upstream
I can also reproduce the issue on a Red Hat machine with glibc 2.34,
but this is actually an error in the man page: one now needs to
preload the libc_malloc_debug.so library.
/usr/share/doc/libc6/NEWS.gz says for 2.34:
* Debugging features in malloc such as the MALLOC_CHECK_ environment variable
(or the glibc.malloc.check tunable), mtrace() and mcheck() have now been
disabled by default in the main C library. Users looking to use these
features now need to preload a new debugging DSO libc_malloc_debug.so to get
this functionality back.
So in the example in the mtrace(3) man page
$ cc -g t_mtrace.c -o t_mtrace
$ export MALLOC_TRACE=/tmp/t
$ ./t_mtrace
$ mtrace ./t_mtrace $MALLOC_TRACE
the 3rd command should be changed to
$ LD_PRELOAD=libc_malloc_debug.so ./t_mtrace
--
Vincent Lefèvre <vinc...@vinc17.net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
