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openSUSE:Step:15-SP1
perf.12455
perf-tools-arm64-Add-libdw-DWARF-post-unwind-su...
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File perf-tools-arm64-Add-libdw-DWARF-post-unwind-support.patch of Package perf.12455
From: Kim Phillips <kim.phillips@arm.com> Date: Thu, 8 Mar 2018 21:10:30 -0600 Subject: perf tools arm64: Add libdw DWARF post unwind support for ARM64 Git-commit: 744e9a91cf898bf027dbe65cc61a5d7565335cba Patch-mainline: v4.17-rc1 References: fate#325865,fate#325861 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: Jean Pihet <jean.pihet@linaro.org> Reported-by: Christian Hansen <chansen3@cisco.com> Signed-off-by: Kim 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: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com> --- tools/perf/Makefile.config | 2 +- tools/perf/arch/arm64/include/arch-tests.h | 12 ++++++ tools/perf/arch/arm64/tests/Build | 2 + tools/perf/arch/arm64/tests/arch-tests.c | 16 ++++++++ tools/perf/arch/arm64/util/Build | 1 + tools/perf/arch/arm64/util/unwind-libdw.c | 60 ++++++++++++++++++++++++++++++ 6 files changed, 92 insertions(+), 1 deletion(-) create mode 100644 tools/perf/arch/arm64/include/arch-tests.h create mode 100644 tools/perf/arch/arm64/tests/arch-tests.c create mode 100644 tools/perf/arch/arm64/util/unwind-libdw.c diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index 89cb2a36b8ff..98ff73648b51 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -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 $(SRCARCH),x86 arm)) +ifneq ($(SRCARCH),$(filter $(SRCARCH),x86 arm arm64)) NO_LIBDW_DWARF_UNWIND := 1 endif diff --git a/tools/perf/arch/arm64/include/arch-tests.h b/tools/perf/arch/arm64/include/arch-tests.h new file mode 100644 index 000000000000..90ec4c8cb880 --- /dev/null +++ b/tools/perf/arch/arm64/include/arch-tests.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef ARCH_TESTS_H +#define ARCH_TESTS_H + +#ifdef HAVE_DWARF_UNWIND_SUPPORT +struct thread; +struct perf_sample; +#endif + +extern struct test arch_tests[]; + +#endif diff --git a/tools/perf/arch/arm64/tests/Build b/tools/perf/arch/arm64/tests/Build index b30eff9bcc83..883c57ff0c08 100644 --- a/tools/perf/arch/arm64/tests/Build +++ b/tools/perf/arch/arm64/tests/Build @@ -1,2 +1,4 @@ libperf-y += regs_load.o libperf-y += dwarf-unwind.o + +libperf-y += arch-tests.o diff --git a/tools/perf/arch/arm64/tests/arch-tests.c b/tools/perf/arch/arm64/tests/arch-tests.c new file mode 100644 index 000000000000..5b1543c98022 --- /dev/null +++ b/tools/perf/arch/arm64/tests/arch-tests.c @@ -0,0 +1,16 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <string.h> +#include "tests/tests.h" +#include "arch-tests.h" + +struct test arch_tests[] = { +#ifdef HAVE_DWARF_UNWIND_SUPPORT + { + .desc = "DWARF unwind", + .func = test__dwarf_unwind, + }, +#endif + { + .func = NULL, + }, +}; diff --git a/tools/perf/arch/arm64/util/Build b/tools/perf/arch/arm64/util/Build index c0b8dfef98ba..68f8a8eb3ad0 100644 --- a/tools/perf/arch/arm64/util/Build +++ b/tools/perf/arch/arm64/util/Build @@ -2,6 +2,7 @@ libperf-y += header.o libperf-y += sym-handling.o libperf-$(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 \ diff --git a/tools/perf/arch/arm64/util/unwind-libdw.c b/tools/perf/arch/arm64/util/unwind-libdw.c new file mode 100644 index 000000000000..7623d85e77f3 --- /dev/null +++ b/tools/perf/arch/arm64/util/unwind-libdw.c @@ -0,0 +1,60 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <elfutils/libdwfl.h> +#include "../../util/unwind-libdw.h" +#include "../../util/perf_regs.h" +#include "../../util/event.h" + +bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg) +{ + struct unwind_info *ui = arg; + struct regs_dump *user_regs = &ui->sample->user_regs; + Dwarf_Word dwarf_regs[PERF_REG_ARM64_MAX], dwarf_pc; + +#define REG(r) ({ \ + Dwarf_Word val = 0; \ + perf_reg_value(&val, user_regs, PERF_REG_ARM64_##r); \ + val; \ +}) + + dwarf_regs[0] = REG(X0); + dwarf_regs[1] = REG(X1); + dwarf_regs[2] = REG(X2); + dwarf_regs[3] = REG(X3); + dwarf_regs[4] = REG(X4); + dwarf_regs[5] = REG(X5); + dwarf_regs[6] = REG(X6); + dwarf_regs[7] = REG(X7); + dwarf_regs[8] = REG(X8); + dwarf_regs[9] = REG(X9); + dwarf_regs[10] = REG(X10); + dwarf_regs[11] = REG(X11); + dwarf_regs[12] = REG(X12); + dwarf_regs[13] = REG(X13); + dwarf_regs[14] = REG(X14); + dwarf_regs[15] = REG(X15); + dwarf_regs[16] = REG(X16); + dwarf_regs[17] = REG(X17); + dwarf_regs[18] = REG(X18); + dwarf_regs[19] = REG(X19); + dwarf_regs[20] = REG(X20); + dwarf_regs[21] = REG(X21); + dwarf_regs[22] = REG(X22); + dwarf_regs[23] = REG(X23); + dwarf_regs[24] = REG(X24); + dwarf_regs[25] = REG(X25); + dwarf_regs[26] = REG(X26); + dwarf_regs[27] = REG(X27); + dwarf_regs[28] = REG(X28); + dwarf_regs[29] = REG(X29); + dwarf_regs[30] = REG(LR); + dwarf_regs[31] = REG(SP); + + if (!dwfl_thread_state_registers(thread, 0, PERF_REG_ARM64_MAX, + dwarf_regs)) + return false; + + dwarf_pc = REG(PC); + dwfl_thread_state_register_pc(thread, dwarf_pc); + + return true; +} -- 2.11.0
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