From: jean.pihet@linaro.org (Jean Pihet)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 0/4] perf: parse the dwarf backtrace info from .debug_frame section
Date: Mon, 16 Sep 2013 11:17:29 +0200 [thread overview]
Message-ID: <1379323053-11458-1-git-send-email-jean.pihet@linaro.org> (raw)
On ARM the debug info is not present in the .eh_frame sections but
in .debug_frame instead, in dwarf format.
This patch set uses libunwind to load and parse the dwarf debug info from
the .debug_frame section if no .eh_frame_hdr section is found; also it
sets the hooks in the perf_regs and libunwind code for ARMv7.
Dependencies:
. if present, libunwind >= 1.1 is needed to prevent a segfault when
parsing the dwarf info,
. libunwind needs to be configured with --enable-debug-frame
to prevent a linkage error. Note: --enable-debug-frame is automatically
selected on ARM).
The generated perf has been tested on ARMv7 (OMAP4, Marvell Armada XP) and
x86_64, using the following commands:
perf record -g [dwarf] -- <binary>
perf report --sort symbol --call-graph --stdio
Jean Pihet (2):
perf tools: Check libunwind for availability of dwarf parsing feature
perf: parse the .debug_frame section in case .eh_frame is not present
Will Deacon (2):
ARM: perf: add support for perf registers API
ARM: perf: wire up perf_regs and unwind support for ARM
arch/arm/Kconfig | 2 +
arch/arm/include/uapi/asm/Kbuild | 1 +
arch/arm/include/uapi/asm/perf_regs.h | 23 +++++++++++
arch/arm/kernel/Makefile | 1 +
arch/arm/kernel/perf_regs.c | 30 ++++++++++++++
tools/perf/arch/arm/Makefile | 3 ++
tools/perf/arch/arm/include/perf_regs.h | 54 +++++++++++++++++++++++++
tools/perf/arch/arm/util/unwind.c | 48 ++++++++++++++++++++++
tools/perf/config/Makefile | 7 +++-
tools/perf/config/feature-tests.mak | 11 ++++-
tools/perf/util/unwind.c | 71 +++++++++++++++++++++++++--------
11 files changed, 232 insertions(+), 19 deletions(-)
create mode 100644 arch/arm/include/uapi/asm/perf_regs.h
create mode 100644 arch/arm/kernel/perf_regs.c
create mode 100644 tools/perf/arch/arm/include/perf_regs.h
create mode 100644 tools/perf/arch/arm/util/unwind.c
--
1.7.11.7
next reply other threads:[~2013-09-16 9:17 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-16 9:17 Jean Pihet [this message]
2013-09-16 9:17 ` [PATCH 1/4] ARM: perf: add support for perf registers API Jean Pihet
2013-09-16 9:17 ` [PATCH 2/4] ARM: perf: wire up perf_regs and unwind support for ARM Jean Pihet
2013-09-16 9:17 ` [PATCH 3/4] perf tools: Check libunwind for availability of dwarf parsing feature Jean Pihet
2013-09-17 10:29 ` Will Deacon
2013-09-24 8:55 ` Jean Pihet
2013-09-24 9:34 ` Jiri Olsa
2013-09-24 10:06 ` Will Deacon
2013-09-24 12:03 ` Jean Pihet
2013-09-24 17:43 ` Jiri Olsa
2013-09-25 6:53 ` Jean Pihet
2013-09-25 7:31 ` Jiri Olsa
2013-09-26 11:39 ` Jean Pihet
2013-09-24 17:12 ` Arnaldo Carvalho de Melo
2013-09-30 16:01 ` Will Deacon
2013-09-16 9:17 ` [PATCH 4/4] perf: parse the .debug_frame section in case .eh_frame is not present Jean Pihet
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