Description Ed Maste 2015-06-03 16:22:51 UTC

I tried to run a debug build of Chrome:

feynman% ./chrome
zsh: abort      ./chrome

There's no log message on the console or in /var/log/messages.

LLDB is no help:

feynman% lldb ./chrome
Current executable set to './chrome' (x86_64).
(lldb) run
Process 25332 launching
failed to fetch ps_strings: No such process
Process 25332 stopped
(lldb) error: initial process state wasn't stopped: exited

GDB is no help:

feynman% gdb79 ./chrome 
GNU gdb (GDB) 7.9 [GDB v7.9 for FreeBSD]
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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and "show warranty" for details.
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Type "show configuration" for configuration details.
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<http://www.gnu.org/software/gdb/bugs/>.
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Reading symbols from ./chrome...(no debugging symbols found)...done.
(gdb) run
Starting program: /tank/emaste/src/ports/www/chromium/chrome 
During startup program terminated with signal SIGABRT, Aborted.
(gdb) 

If one knows what to look for dtrace is helpful:

dtrace: description 'fbt:kernel:exec_elf64_imgact:return ' matched 1 probe
CPU     ID                    FUNCTION:NAME
  4  13890         exec_elf64_imgact:return error=12

That's ENOMEM. From imgact_elf.c:

        if (data_size > lim_cur(imgp->proc, RLIMIT_DATA) ||
            text_size > maxtsiz ||
            total_size > lim_cur(imgp->proc, RLIMIT_VMEM) ||
            racct_set(imgp->proc, RACCT_DATA, data_size) != 0 ||
            racct_set(imgp->proc, RACCT_VMEM, total_size) != 0) {
                PROC_UNLOCK(imgp->proc);
                return (ENOMEM);
        }

This case should produce some sort of user-facing log message (likely from kern_execve, not imgact_elf).

        /*
         *      Loop through the list of image activators, calling each one.   
         *      An activator returns -1 if there is no match, 0 on success,    
         *      and an error otherwise.
         */
        for (i = 0; error == -1 && execsw[i]; ++i) {
                if (execsw[i]->ex_imgact == NULL ||
                    execsw[i]->ex_imgact == img_first) {
                        continue;
                }
                error = (*execsw[i]->ex_imgact)(imgp);
        }

        if (error) {
                if (error == -1) {
                        if (textset == 0)
                                VOP_UNSET_TEXT(imgp->vp);
                        error = ENOEXEC;
                }
                goto exec_fail_dealloc;
        }