[PATCH kvm-unit-tests v7 0/5] Debugging aids

[Peter Feiner <pfeiner@google.com>]

Paolo, please apply :-)

Some aids for debugging: stack dumping, register dumping, and printing
failing assertion conditions.

Compiled on ppc64, arm64, i386, x86_64.

v7:
	* Rebased.

v6:
	* Don't print dump_stack's call to backtrace() in the stack
	  trace rather than having backtrace() skip over the first
	  return address in the trace.
	* Actually removed lib/asm-generic/stack.c.

v5:
	* Removed unused "b" flag from run_tests.sh
	* Removed misleading comment in mkstandalone.sh.

v4:
	* Moved around arch and asm files per Linux style (hopefully).
	* Added --[enable|disable]-pretty-print-stacks to ./configure.
	  This has obviated the -p command-line option in
	  ./run_tests.sh that I introduced in v1.
	* Fixed arch-neutral backtrace so backtrace itself isn't
	  included.

v3:
	* Renamed functions to match standard backtrace functions
	* Added asm-generic stack walker that uses __builtin_return_address.
	* Moved offset out of libcflat and into pretty printer
	* Made pretty printer more robust w.r.t. errors: now it just
	  continues printing.

v2:
        * Fixed a bunch tests on x86 that broke with
          -fno-omit-frame-pointer.
        * Only use -fno-omit-frame-pointer on x86. I suspect arm & ppc
          will have similar problems that I fixed for x86.

Peter Feiner (5):
  lib: backtrace printing
  x86: lib: debug dump on unhandled exceptions
  lib: dump stack on failed assert()
  scripts: pretty print stack traces
  scripts: automatically pretty print stacks

 Makefile                       |  7 +--
 configure                      | 10 +++++
 lib/arm/asm/stack.h            |  0
 lib/arm64/asm/stack.h          |  0
 lib/libcflat.h                 |  9 +++-
 lib/powerpc/asm/stack.h        |  0
 lib/ppc64/asm/stack.h          |  0
 lib/stack.c                    | 96 ++++++++++++++++++++++++++++++++++++++++++
 lib/stack.h                    | 20 +++++++++
 lib/x86/asm/stack.h            | 14 ++++++
 lib/x86/desc.c                 | 69 +++++++++++++++++++++++++++---
 lib/x86/stack.c                | 31 ++++++++++++++
 run_tests.sh                   |  8 +++-
 scripts/mkstandalone.sh        |  2 +
 scripts/pretty_print_stacks.py | 89 +++++++++++++++++++++++++++++++++++++++
 x86/Makefile.common            |  4 ++
 16 files changed, 347 insertions(+), 12 deletions(-)
 create mode 100644 lib/arm/asm/stack.h
 create mode 100644 lib/arm64/asm/stack.h
 create mode 100644 lib/powerpc/asm/stack.h
 create mode 100644 lib/ppc64/asm/stack.h
 create mode 100644 lib/stack.c
 create mode 100644 lib/stack.h
 create mode 100644 lib/x86/asm/stack.h
 create mode 100644 lib/x86/stack.c
 create mode 100755 scripts/pretty_print_stacks.py

-- 
2.8.0.rc3.226.g39d4020