perf tools: Adding xz decompression support

hi,
adding support to decompress kernel modules on Fedora 21 (lzma compression) vaguely continuing in previous RFC:
http://marc.info/?l=linux-kernel&m=142261340327588&w=2

I'm basically extending he decompression framework Namhyung introduced earlier plus other fixes for kernel modules dso objects handling.

Last patch adds decompression support to annotate command, so it now displays annotation for compressed kernel modules.

Current work available at:
git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
perf/lzma

NOTE It's rebased on 'perf/build' branch.

v2 changes:
- added warning message for undetected lzma support (Arnaldo)
- simplyfied code in decompress_kmodule (Namhyung)
- renamed dsos__new to dsos__addnew (Arnaldo)
- moved kmod_path__parse to dso.c object because of the python's perf.so compilation issue
- added extra m.comp check and comment into map_groups__set_module_path

thanks,
jirka

---
Jiri Olsa (14):
perf tools: Remove superfluous thread->comm_set setting tools build: Add feature check for lzma library
perf tools: Add lzma decompression support for kernel module perf tools: Add kmod_path__parse function
perf tools: Add dsos__addnew function
perf tools: Add machine__module_dso function
perf tools: Use kmod_path__parse for machine__new_dso perf tools: Use kmod_path__parse in map_groups__set_modules_path_dir perf tools: Use kmod_path__parse in decompress_kmodule perf tools: Use kmod_path__parse in is_kernel_module perf tools: Remove compressed argument from is_kernel_module perf tools: Remove is_kmodule_extension function
perf tools: Try to lookup kernel module map before creating one perf annotate: Allow annotation for decompressed kernel modules

 tools/build/Makefile.feature    |   6 +-
 tools/build/feature/Makefile    |   8 ++-
 tools/build/feature/test-all.c  |   5 ++
 tools/build/feature/test-lzma.c |  10 +++
 tools/perf/Makefile.perf        |   2 +
 tools/perf/config/Makefile      |  11 +++
 tools/perf/tests/Build          |   1 +
 tools/perf/tests/builtin-test.c |   4 ++
 tools/perf/tests/kmod-path.c    |  73 +++++++++++++++++++
 tools/perf/tests/tests.h        |   1 +
 tools/perf/util/Build           |   1 +
 tools/perf/util/annotate.c      |  32 ++++++++-
 tools/perf/util/dso.c           | 118 +++++++++++++++++++++---------
 tools/perf/util/dso.h           |  18 ++++-
 tools/perf/util/header.c        |   2 +-
 tools/perf/util/lzma.c          |  95 ++++++++++++++++++++++++
 tools/perf/util/machine.c       | 155 ++++++++++++++++++++++------------------
 tools/perf/util/symbol-elf.c    |  20 +++---
 tools/perf/util/thread.c        |   1 -
 tools/perf/util/util.h          |   4 ++
 20 files changed, 449 insertions(+), 118 deletions(-)
 create mode 100644 tools/build/feature/test-lzma.c
 create mode 100644 tools/perf/tests/kmod-path.c
 create mode 100644 tools/perf/util/lzma.c