On Thu, Aug 10, 2017 at 12:27 -0400, Martin Pieuchot wrote:
> On 10/08/17(Thu) 18:21, Mark Kettenis wrote:
> > > Date: Thu, 10 Aug 2017 12:10:27 -0400
> > > From: Martin Pieuchot <m...@openbsd.org>
> > > 
> > > Building a profiled binary, using -pg with clang doesn't work as
> > > expected.  A gmon.out is properly generated when the binary exit,
> > > but it doesn't include any profiling data.
> > 
> > Seems to work when I pass -nopie on the command line.  Did this ever
> > work since we switched to static PIE?
> Yes, it works with GCC, I use it all the time.

Not sure about that...  Jul 24 snap (from before the clang switch):

kemushi:usr.bin/nc% cc --version
cc (GCC) 4.2.1 20070719 
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO

kemushi:usr.bin/nc% make DEBUG="-g -pg"
cc -O2 -pipe -g -pg -Werror-implicit-function-declaration -MD -MP  -c 
cc -O2 -pipe -g -pg -Werror-implicit-function-declaration -MD -MP  -c 
cc -O2 -pipe -g -pg -Werror-implicit-function-declaration -MD -MP  -c 
cc -g -pg  -o nc netcat.o atomicio.o socks.o -ltls -lssl -lcrypto
netcat.o: In function `main':
/usr/src/usr.bin/nc/netcat.c:429: warning: warning: mktemp() possibly used 
unsafely; consider using mkstemp()
kemushi:usr.bin/nc% ./obj/nc 
usage: nc [-46cDdFhklNnrStUuvz] [-C certfile] [-e name] [-H hash] [-I length]
          [-i interval] [-K keyfile] [-M ttl] [-m minttl] [-O length]
          [-o staplefile] [-P proxy_username] [-p source_port] [-R CAfile]
          [-s source] [-T keyword] [-V rtable] [-W recvlimit] [-w timeout]
          [-X proxy_protocol] [-x proxy_address[:port]] [-Z peercertfile]
          [destination] [port]
zsh: abort (core dumped)  ./obj/nc
kemushi:usr.bin/nc% gdb -c nc.core obj/nc 
GNU gdb 6.3
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "amd64-unknown-openbsd6.1"...
Core was generated by `nc'.
Program terminated with signal 6, Aborted.
Reading symbols from /usr/lib/libtls.so.15.7...done.
Loaded symbols for /usr/lib/libtls.so.15.7
Reading symbols from /usr/lib/libssl.so.43.3...done.
Loaded symbols for /usr/lib/libssl.so.43.3
Reading symbols from /usr/lib/libcrypto.so.41.2...done.
Loaded symbols for /usr/lib/libcrypto.so.41.2
Reading symbols from /usr/libexec/ld.so...done.
Loaded symbols for /usr/libexec/ld.so
#0  0x0000000000412d65 in profil () at {standard input}:5
5       {standard input}: No such file or directory.
        in {standard input}
(gdb) where
#0  0x0000000000412d65 in profil () at {standard input}:5
#1  0x00007f7ffffee8e0 in ?? ()
#2  0x000000000042062a in sysctl () at {standard input}:5
#3  0x0000000000412694 in _mcleanup () at /usr/src/lib/libc/gmon/gmon.c:177
#4  0x0000000000421d6a in *_libc___cxa_finalize (dso=0x0)
    at /usr/src/lib/libc/stdlib/atexit.c:159
#5  0x000000000041b997 in *_libc_exit (status=1)
    at /usr/src/lib/libc/stdlib/exit.c:57
#6  0x000000000040083e in usage (ret=Variable "ret" is not available.
) at /usr/src/usr.bin/nc/netcat.c:1751
#7  0x000000000040395a in main (argc=1, argv=0x7f7fffff3240)
    at /usr/src/usr.bin/nc/netcat.c:385
Current language:  auto; currently asm

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