misc: Rename misc.(hh|cc) to logging.(hh|cc)

These files aren't a collection of miscellaneous stuff, they're the
definition of the Logger interface, and a few utility macros for
calling into that interface (panic, warn, etc.).

Change-Id: I84267ac3f45896a83c0ef027f8f19c5e9a5667d1
Reviewed-on: https://gem5-review.googlesource.com/6226
Reviewed-by: Brandon Potter <Brandon.Potter@amd.com>
Maintainer: Gabe Black <gabeblack@google.com>

style: [patch 1/22] use /r/3648/ to reorganize includes

base: remove Trace::enabled flag

The DTRACE() macro tests both Trace::enabled and the specific flag. This
change uses the same administrative interface for enabling/disabling
tracing, but masks the SimpleFlags settings directly. This eliminates a
load for every DTRACE() test, e.g. DPRINTF.

base: Reimplement the DPRINTF mechanism in a Logger class

This patch adds a Logger class encapsulating dprintf. This allows
variants of DPRINTF logging to be constructed and substituted in
place of the default behaviour.

The Logger provides a logMessage(when, name, format, ...) member
function like Trace::dprintf and a getOstream member function to
use a raw ostream for logging.

A class OstreamLogger is provided which generates the customary
debugging output with Trace::OstreamLogger::logMessage being the
old Trace::dprintf.

base: Replace the internal varargs stuff with C++11 constructs

We currently use our own home-baked support for type-safe variadic
functions. This is confusing and somewhat limited (e.g., cprintf only
supports a limited number of arguments). This changeset converts all
uses of our internal varargs support to use C++11 variadic macros.

Trace: FIx issue with creation of trace file with output dir overhaul.

trace: reimplement the DTRACE function so it doesn't use a vector
At the same time, rename the trace flags to debug flags since they
have broader usage than simply tracing. This means that
--trace-flags is now --debug-flags and --trace-help is now --debug-help

includes: sort all includes

Make commenting on close namespace brackets consistent.

Ran all the source files through 'perl -pi' with this script:

s|\s*(};?\s*)?/\*\s*(end\s*)?namespace\s*(\S+)\s*\*/(\s*})?|} // namespace $3|;
s|\s*};?\s*//\s*(end\s*)?namespace\s*(\S+)\s*|} // namespace $2\n|;
s|\s*};?\s*//\s*(\S+)\s*namespace\s*|} // namespace $1\n|;

Also did a little manual editing on some of the arch/*/isa_traits.hh files
and src/SConscript.

remove the extern C around gdb helper functions. It's need needed for any new version of gdb to work and it causes at least mine to segfault

Default to tracing being disabled in C++, it will be turned
on in python. Fix the trace start code so it actually starts
when it is suppsed to. Make the Exec tracing stuff obey the
trace enabled flag.

Clean up tracing stuff more, get rid of the trace log since
its not all that useful. Fix a few bugs with python/C++
integration.

Get rid of the Trace ParamContext and give python direct
access to enabling/disabling tracing. Command line is
unchanged except for the removal of --trace-cycle since
it's not so clear what that means.

Get rid of the gross operator,()/variadic macro hack
that made ccprintf and friends work, turn it into a
normal function (though it still has a slightly strange
implementation.) All instances of variadic macros
are not yet removed, but I know how, and it will happen.

One side effect of this new implementation is that a
cprintf statement can now only have 16 parameters, though
it's easy enough to raise this number if needed.

remove extern "C" from the functions we all from gdb. This isn't requried and trips up GDB sometimes when i thinks the extern
name should be mangled, but it isn't

Updated Authors from bk prs info

New directory structure:
- simulator source now in 'src' subdirectory
- imported files from 'ext' repository
- support building in arbitrary places, including
outside of the source tree. See comment at top
of SConstruct file for more details.
Regression tests are temporarily disabled; that
syetem needs more extensive revisions.

SConstruct:
Update for new directory structure.
Modify to support build trees that are not subdirectories
of the source tree. See comment at top of file for
more details.
Regression tests are temporarily disabled.
src/arch/SConscript:
src/arch/isa_parser.py:
src/python/SConscript:
Update for new directory structure.