src/lib/libproc/proc_sym.c, branch upstream/11.1.0

Fix debug symbols loading in libproc: 0 is a valid file descriptor.

2015-03-13T04:26:48+00:00

Reported by:	Chris Torek

Teach libproc how to find debugging symbols in /usr/lib/debug.

2015-02-13T03:18:29+00:00

MFC after:	1 week

Stop iterating and return if the caller-supplied callback function returns

2015-01-31T03:22:00+00:00

a non-zero value.

MFC after:	1 week

Ensure that we don't try to demangle a symbol name if we failed to look

2015-01-25T00:34:43+00:00

up the symbol. Add a test to exercise this code path.

Reviewed by:	adrian

Fix a memory leak that occured when looking up CTF info for a symbol.

2014-12-23T15:40:57+00:00

Remove an incorrect and useless debug print.

2014-10-04T02:34:30+00:00

X-MFC-With:	r272488

Hook up support for userland CTF support in DTrace. This required some

2014-10-03T23:20:37+00:00

modifications to libproc to support fetching the CTF info for a given file.

With this change, dtrace(1) is able to resolve type info for function and
USDT probe arguments, and function return values. In particular, the args[n]
syntax should now work for referencing arguments of userland probes,
provided that the requisite CTF info is available.

The uctf tests pass if the test programs are compiled with CTF info. The
current infrastructure around the DTrace test suite doesn't support this
yet.

Differential Revision:	https://reviews.freebsd.org/D891
MFC after:		1 month
Relnotes:		yes
Sponsored by:		EMC / Isilon Storage Division

Factor out some of the duplicated code in the symbol lookup functions, in

2014-09-25T19:08:06+00:00

preparation for adding userland CTF support to DTrace.

MFC after:	1 month
Sponsored by:	EMC / Isilon Storage Division

Fix a bug in r265255: only return NULL if the requested map wasn't found.

2014-08-24T17:02:27+00:00

Submitted by:	Luke Chang-Hsien Tsai 
MFC after:	1 week

In r268463, I misplaced a return in demangle(), causing the function to

2014-08-09T12:25:06+00:00

erroneously skip symbols that were not mangled at all.  Fix this by
moving the return into the preceding if block.

While here, simplify the code by letting __cxa_demangle() allocate the
needed space for the demangled symbol.  This also fixes a memory leak,
which would occur whenever __cxa_demangle() failed.

Reported by:	pgj
MFC after:	3 days