Add backtrace_sandbox_{init,fini} for backtrace use in sandboxes.
(Kyle Evans @ FreeBSD)

Decode function descriptors (aka plabels) on hppa to fix backtrace.

PR/56881: hppa: backtrace_symbols() delivers bogus results for some dynloaded functions

Trailing whitespace

args are flipped.

use provide KERN_PROC_PATHNAME in PROC_ARGS.

From Ed Maste:

libexecinfo: Include terminating null in byte count

Otherwise, a formatted string with a strlen equal to the remaining
buffer space would have the last character omitted (becau

From Ed Maste:

libexecinfo: Include terminating null in byte count

Otherwise, a formatted string with a strlen equal to the remaining
buffer space would have the last character omitted (because vsnprintf
always null-terminates), and later the assert in backtrace_symbols_fmt
would fail.

show more ...

use sysctl to find the pathname argv[0] if available (from FreeBSD via
Ed Maste)

fix cleanup on error

Add a similar to linux backtrace_* and execinfo.h family of functions