perf cs-etm: Support call indentation

The perf script callindent is derived from call stack in thread context,
CS ETM ignores the requirement for callindent without pushing and poping
call stack.

Enable thread-stack when either itrace thread-stack support or last branch
entries are requested, allocate the branch stack storage accordingly, and
feed taken branches to thread_stack__event() whenever thread-stack state
is needed.

When callindent is requested, pass callstack=true to thread_stack__event()
so the common thread-stack code maintains call depth for branch samples.

Before:

  perf script -F +callindent

  callchain_test    6543 [002]          1 branches: main                                 ffff93252258 __libc_start_call_main+0x78 (/usr/lib/aarch64-linux-gnu/libc.so.6)
  callchain_test    6543 [002]          1 branches: foo                                  aaaad6b607c4 main+0x8 (/home/kernel/leoy/test_cs_callchain/callchain_test)
  callchain_test    6543 [002]          1 branches: print                                aaaad6b607ac foo+0x8 (/home/kernel/leoy/test_cs_callchain/callchain_test)
  callchain_test    6543 [002]          1 branches: do_svc                               aaaad6b60794 print+0x8 (/home/kernel/leoy/test_cs_callchain/callchain_test)
  callchain_test    6543 [002]          1 branches: vectors                              aaaad6b60780 do_svc+0x18 (/home/kernel/leoy/test_cs_callchain/callchain_test)
  callchain_test    6543 [002]          1 branches: el0t_64_sync_handler             ffff80008001159c el0t_64_sync+0x194 ([kernel.kallsyms])
  callchain_test    6543 [002]          1 branches: el0_svc                          ffff800081829194 el0t_64_sync_handler+0x9c ([kernel.kallsyms])
  callchain_test    6543 [002]          1 branches: lockdep_hardirqs_off             ffff800081828794 el0_svc+0x24 ([kernel.kallsyms])
  callchain_test    6543 [002]          1 branches: __this_cpu_preempt_check         ffff80008182b348 lockdep_hardirqs_off+0xf0 ([kernel.kallsyms])

After:

  callchain_test    6543 [002]          1 branches:                 main                                                 ffff93252258 __libc_start_call_main+0x78 (/usr/lib/aarch64-linux-gnu/libc.so.6)
  callchain_test    6543 [002]          1 branches:                     foo                                              aaaad6b607c4 main+0x8 (/home/kernel/leoy/test_cs_callchain/callchain_test)
  callchain_test    6543 [002]          1 branches:                         print                                        aaaad6b607ac foo+0x8 (/home/kernel/leoy/test_cs_callchain/callchain_test)
  callchain_test    6543 [002]          1 branches:                             do_svc                                   aaaad6b60794 print+0x8 (/home/kernel/leoy/test_cs_callchain/callchain_test)
  callchain_test    6543 [002]          1 branches:                                 vectors                              aaaad6b60780 do_svc+0x18 (/home/kernel/leoy/test_cs_callchain/callchain_test)
  callchain_test    6543 [002]          1 branches:                                     el0t_64_sync_handler         ffff80008001159c el0t_64_sync+0x194 ([kernel.kallsyms])
  callchain_test    6543 [002]          1 branches:                                         el0_svc                  ffff800081829194 el0t_64_sync_handler+0x9c ([kernel.kallsyms])
  callchain_test    6543 [002]          1 branches:                                             lockdep_hardirqs_off ffff800081828794 el0_svc+0x24 ([kernel.kallsyms])
  callchain_test    6543 [002]          1 branches:                                                 __this_cpu_preempt_check                         ffff80008182b348 lockdep_hardirqs_off+0xf0 ([kernel.kallsyms])

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Reviewed-by: James Clark <james.clark@linaro.org>
Signed-off-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

0 files changed, 0 insertions, 0 deletions