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[patch v7 00/24] record-btrace: reverse


This update incorporates Jan's feedback and resolves opens with respect
to frame_id handling, frame unwinding, and (reverse) stepping.

The only remaining open is whether "record goto" should be implemented
via to_resume/to_wait.

I noted partial approvals for individual patches in the commit message
of the respective patch.


The series can be split roughly in three parts.  At the bottom, there
are a few small preparation patches.  I would commit them individually
as soon as they are approved.

Then, there's a big patch that changes the internals of btrace, improves
the existing record btrace commands and fixes PR/15240.  I would commit
the entire series until "record-btrace: make ranges include begin and end"
(inclusive) once approved.

The "record function-call-history" command can now show the call
relationship like this:

(gdb) record function-call-history /cli
12          fib inst 101,111    at src/fib.c:3,7
13            fib       inst 112,124    at src/fib.c:3,8
14          fib inst 125,129    at src/fib.c:7
15            fib       inst 130,142    at src/fib.c:3,8
16          fib inst 143,147    at src/fib.c:7,8
17        fib   inst 148,152    at src/fib.c:7,8
18      fib     inst 153,157    at src/fib.c:7
19        fib   inst 158,168    at src/fib.c:3,7
20          fib inst 169,179    at src/fib.c:3,7
21            fib       inst 180,185    at src/fib.c:3,4

The patches ad the top add support for reverse execution.  I would also
commit the entire series once approved.


Markus Metzger (24):
  btrace, linux: fix memory leak when reading branch trace
  btrace: uppercase btrace_read_type
  gdbarch: add instruction predicate methods
  frame:  add frame_is_tailcall function
  frame: artificial frame id's
  btrace: change branch trace data structure
  record-btrace: fix insn range in function call history
  record-btrace: start counting at one
  btrace: increase buffer size
  record-btrace: optionally indent function call history
  record-btrace: make ranges include begin and end
  btrace: add replay position to btrace thread info
  target: add ops parameter to to_prepare_to_store method
  record-btrace: supply register target methods
  frame, backtrace: allow targets to supply a frame unwinder
  record-btrace, frame: supply target-specific unwinder
  record-btrace: provide xfer_partial target method
  record-btrace: add to_wait and to_resume target methods.
  record-btrace: provide target_find_new_threads method
  record-btrace: add record goto target methods
  record-btrace: extend unwinder
  btrace, gdbserver: read branch trace incrementally
  record-btrace: show trace from enable location
  record-btrace: add (reverse-)stepping support

 gdb/NEWS                                           |   18 +
 gdb/amd64-linux-nat.c                              |    6 +-
 gdb/amd64-tdep.c                                   |   67 +
 gdb/arch-utils.c                                   |   15 +
 gdb/arch-utils.h                                   |    4 +
 gdb/btrace.c                                       | 1610 ++++++++++++++++----
 gdb/btrace.h                                       |  269 +++-
 gdb/common/btrace-common.h                         |   29 +-
 gdb/common/linux-btrace.c                          |  125 +-
 gdb/common/linux-btrace.h                          |   15 +-
 gdb/doc/gdb.texinfo                                |   32 +-
 gdb/dwarf2-frame-tailcall.c                        |    4 +-
 gdb/dwarf2-frame.c                                 |   14 +-
 gdb/frame-unwind.c                                 |   86 +-
 gdb/frame.c                                        |   65 +-
 gdb/frame.h                                        |   18 +-
 gdb/gdbarch.c                                      |   75 +
 gdb/gdbarch.h                                      |   18 +
 gdb/gdbarch.sh                                     |    9 +
 gdb/gdbserver/linux-low.c                          |   36 +-
 gdb/gdbserver/server.c                             |   15 +-
 gdb/gdbserver/target.h                             |    9 +-
 gdb/i386-linux-nat.c                               |    6 +-
 gdb/i386-tdep.c                                    |   59 +
 gdb/inf-child.c                                    |    2 +-
 gdb/infcmd.c                                       |    6 +-
 gdb/monitor.c                                      |    2 +-
 gdb/ravenscar-thread.c                             |    7 +-
 gdb/record-btrace.c                                | 1473 +++++++++++++++---
 gdb/record-full.c                                  |    3 +-
 gdb/record.c                                       |    4 +
 gdb/record.h                                       |    7 +
 gdb/remote-m32r-sdi.c                              |    2 +-
 gdb/remote-mips.c                                  |    5 +-
 gdb/remote.c                                       |   32 +-
 gdb/stack.c                                        |    2 +-
 gdb/target.c                                       |   65 +-
 gdb/target.h                                       |   35 +-
 gdb/testsuite/gdb.btrace/Makefile.in               |    3 +-
 gdb/testsuite/gdb.btrace/delta.exp                 |   76 +
 gdb/testsuite/gdb.btrace/exception.cc              |   56 +
 gdb/testsuite/gdb.btrace/exception.exp             |   67 +
 gdb/testsuite/gdb.btrace/finish.exp                |   70 +
 gdb/testsuite/gdb.btrace/function_call_history.exp |  329 ++--
 gdb/testsuite/gdb.btrace/instruction_history.exp   |   77 +-
 gdb/testsuite/gdb.btrace/multi-thread-step.c       |   53 +
 gdb/testsuite/gdb.btrace/multi-thread-step.exp     |   99 ++
 gdb/testsuite/gdb.btrace/next.exp                  |   89 ++
 gdb/testsuite/gdb.btrace/nexti.exp                 |   89 ++
 gdb/testsuite/gdb.btrace/record_goto.c             |   51 +
 gdb/testsuite/gdb.btrace/record_goto.exp           |  177 +++
 gdb/testsuite/gdb.btrace/rn-dl-bind.c              |   37 +
 gdb/testsuite/gdb.btrace/rn-dl-bind.exp            |   48 +
 gdb/testsuite/gdb.btrace/step.exp                  |  113 ++
 gdb/testsuite/gdb.btrace/stepi.exp                 |  114 ++
 gdb/testsuite/gdb.btrace/tailcall.exp              |  103 ++
 gdb/testsuite/gdb.btrace/unknown_functions.c       |   45 +
 gdb/testsuite/gdb.btrace/unknown_functions.exp     |   60 +
 gdb/testsuite/gdb.btrace/x86-record_goto.S         |  355 +++++
 gdb/testsuite/gdb.btrace/x86-tailcall.S            |  279 ++++
 gdb/testsuite/gdb.btrace/x86-tailcall.c            |   39 +
 61 files changed, 5799 insertions(+), 879 deletions(-)
 create mode 100644 gdb/testsuite/gdb.btrace/delta.exp
 create mode 100644 gdb/testsuite/gdb.btrace/exception.cc
 create mode 100755 gdb/testsuite/gdb.btrace/exception.exp
 create mode 100644 gdb/testsuite/gdb.btrace/finish.exp
 create mode 100644 gdb/testsuite/gdb.btrace/multi-thread-step.c
 create mode 100644 gdb/testsuite/gdb.btrace/multi-thread-step.exp
 create mode 100644 gdb/testsuite/gdb.btrace/next.exp
 create mode 100644 gdb/testsuite/gdb.btrace/nexti.exp
 create mode 100644 gdb/testsuite/gdb.btrace/record_goto.c
 create mode 100644 gdb/testsuite/gdb.btrace/record_goto.exp
 create mode 100644 gdb/testsuite/gdb.btrace/rn-dl-bind.c
 create mode 100644 gdb/testsuite/gdb.btrace/rn-dl-bind.exp
 create mode 100644 gdb/testsuite/gdb.btrace/step.exp
 create mode 100644 gdb/testsuite/gdb.btrace/stepi.exp
 create mode 100644 gdb/testsuite/gdb.btrace/tailcall.exp
 create mode 100644 gdb/testsuite/gdb.btrace/unknown_functions.c
 create mode 100644 gdb/testsuite/gdb.btrace/unknown_functions.exp
 create mode 100644 gdb/testsuite/gdb.btrace/x86-record_goto.S
 create mode 100644 gdb/testsuite/gdb.btrace/x86-tailcall.S
 create mode 100644 gdb/testsuite/gdb.btrace/x86-tailcall.c

-- 
1.8.3.1


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