Commit 744e9a91 authored by Kim Phillips's avatar Kim Phillips Committed by Arnaldo Carvalho de Melo
Browse files

perf tools arm64: Add libdw DWARF post unwind support for ARM64 

Based on prior work:

  https://lkml.org/lkml/2014/5/6/395



and on how other arches add libdw unwind support.  Includes support for
running the unwind test, e.g., on a system with only elfutils' libdw
0.170, the test now runs, and successfully:

  $ ./perf test unwind
  56: Test dwarf unwind                 : Ok

Originally-by: default avatarJean Pihet <jean.pihet@linaro.org>
Reported-by: default avatarChristian Hansen <chansen3@cisco.com>
Signed-off-by: default avatarKim Phillips <kim.phillips@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180308211030.4ee4a0d6ff6dc5cda1b567d4@arm.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 03d9fcb7

tools/perf/Makefile.config

+1 −1
Original line number Diff line number Diff line
@@ -75,7 +75,7 @@ endif 
# Disable it on all other architectures in case libdw unwind

# support is detected in system. Add supported architectures

# to the check.

ifneq ($(SRCARCH),$(filter $(SRCARCH),x86 arm powerpc s390))

ifneq ($(SRCARCH),$(filter $(SRCARCH),x86 arm arm64 powerpc s390))

  NO_LIBDW_DWARF_UNWIND := 1

endif

tools/perf/arch/arm64/include/arch-tests.h

0 → 100644
+12 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

#ifndef ARCH_TESTS_H

#define ARCH_TESTS_H



#ifdef HAVE_DWARF_UNWIND_SUPPORT

struct thread;

struct perf_sample;

#endif



extern struct test arch_tests[];



#endif

tools/perf/arch/arm64/tests/Build

+2 −0
Original line number Diff line number Diff line 
libperf-y += regs_load.o

libperf-y += dwarf-unwind.o



libperf-y += arch-tests.o

tools/perf/arch/arm64/tests/arch-tests.c

0 → 100644
+16 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

#include <string.h>

#include "tests/tests.h"

#include "arch-tests.h"



struct test arch_tests[] = {

#ifdef HAVE_DWARF_UNWIND_SUPPORT

	{

		.desc = "DWARF unwind",

		.func = test__dwarf_unwind,

	},

#endif

	{

		.func = NULL,

	},

};

tools/perf/arch/arm64/util/Build

+1 −0
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ libperf-y += header.o 
libperf-y += sym-handling.o

libperf-$(CONFIG_DWARF)     += dwarf-regs.o

libperf-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o

libperf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o



libperf-$(CONFIG_AUXTRACE) += ../../arm/util/pmu.o \

			      ../../arm/util/auxtrace.o \

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