linux-kernel - [PATCH v4 0/6] Fix missing leaf-function callers when recording

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Message-Id: <20211215151139.40854-1-german.gomez@arm.com>
Date:   Wed, 15 Dec 2021 15:11:32 +0000
From:   German Gomez <german.gomez@....com>
To:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        acme@...nel.org
Cc:     German Gomez <german.gomez@....com>,
        John Garry <john.garry@...wei.com>,
        Will Deacon <will@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v4 0/6] Fix missing leaf-function callers when recording

(This cset applies on top of [1])

Call-graphs on ARM64 using the option "--call-grah fp" are missing the
callers of the leaf functions. See [PATCH 6/6] for a before and after
after example using this cset.

[1] https://lore.kernel.org/all/20211207180653.1147374-1-german.gomez@arm.com/

---
Changes since v3
  - Only record LR register instead of all registers in [PATCH 1/6].
  - Introduce [PATCH 5/6] to refactor the SAMPL_REG macro.
  - Fix compilation issues on different platforms.

Alexandre Truong (5):
  perf tools: record ARM64 LR register automatically
  perf tools: add a mechanism to inject stack frames
  perf tools: Refactor script__setup_sample_type()
  perf tools: enable dwarf_callchain_users on arm64
  perf tools: determine if LR is the return address

German Gomez (1):
  perf tools: Refactor SMPL_REG macro in perf_regs.h

 tools/perf/arch/arm64/util/machine.c          |  7 +++
 tools/perf/builtin-record.c                   |  8 +++
 tools/perf/builtin-report.c                   |  4 +-
 tools/perf/builtin-script.c                   | 13 +---
 tools/perf/util/Build                         |  1 +
 .../util/arm64-frame-pointer-unwind-support.c | 63 +++++++++++++++++++
 .../util/arm64-frame-pointer-unwind-support.h | 10 +++
 tools/perf/util/callchain.c                   |  9 ++-
 tools/perf/util/callchain.h                   |  4 +-
 tools/perf/util/machine.c                     | 50 ++++++++++++++-
 tools/perf/util/machine.h                     |  1 +
 tools/perf/util/perf_regs.h                   |  7 ++-
 12 files changed, 157 insertions(+), 20 deletions(-)
 create mode 100644 tools/perf/util/arm64-frame-pointer-unwind-support.c
 create mode 100644 tools/perf/util/arm64-frame-pointer-unwind-support.h

-- 
2.25.1