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Date: Sat, 3 Dec 2016 13:38:37 +0530
From: Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Kim Phillips <kim.phillips@....com>,
Chris Ryder <chris.ryder@....com>,
Pawel Moll <pawel.moll@....com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
linux-perf-users@...r.kernel.org,
Will Deacon <will.deacon@....com>,
Mark Rutland <mark.rutland@....com>,
linux-kernel@...r.kernel.org,
Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
Subject: Re: [PATCH 2/2] perf annotate: AArch64 support
Hi,
Sorry, I replied little late. I see you already included patch in perf/core.
I've tested this patch on powerpc with perf.data and vmlinux shared by Kim.
Looks good to me.
You can add my Tested-by.
-Ravi.
On Wednesday 30 November 2016 08:53 PM, Kim Phillips wrote:
> This is a regex converted version from the original:
>
> https://lkml.org/lkml/2016/5/19/461
>
> Add basic support to recognise AArch64 assembly. This allows perf to
> identify AArch64 instructions that branch to other parts within the
> same function, thereby properly annotating them.
>
> Rebased onto new cross-arch annotation bits:
>
> https://lkml.org/lkml/2016/11/25/546
>
> Sample output:
>
> security_file_permission vmlinux
> 5.80 │ ← ret ▒
> │70: ldr w0, [x21,#68] ▒
> 4.44 │ ↓ tbnz d0 ▒
> │ mov w0, #0x24 // #36 ▒
> 1.37 │ ands w0, w22, w0 ▒
> │ ↑ b.eq 60 ▒
> 1.37 │ ↓ tbnz e4 ▒
> │ mov w19, #0x20000 // #131072 ▒
> 1.02 │ ↓ tbz ec ▒
> │90:┌─→ldr x3, [x21,#24] ▒
> 1.37 │ │ add x21, x21, #0x10 ▒
> │ │ mov w2, w19 ▒
> 1.02 │ │ mov x0, x21 ▒
> │ │ mov x1, x3 ▒
> 1.71 │ │ ldr x20, [x3,#48] ▒
> │ │→ bl __fsnotify_parent ▒
> 0.68 │ │↑ cbnz 60 ▒
> │ │ mov x2, x21 ▒
> 1.37 │ │ mov w1, w19 ▒
> │ │ mov x0, x20 ▒
> 0.68 │ │ mov w5, #0x0 // #0 ▒
> │ │ mov x4, #0x0 // #0 ▒
> 1.71 │ │ mov w3, #0x1 // #1 ▒
> │ │→ bl fsnotify ▒
> 1.37 │ │↑ b 60 ▒
> │d0:│ mov w0, #0x0 // #0 ▒
> │ │ ldp x19, x20, [sp,#16] ▒
> │ │ ldp x21, x22, [sp,#32] ▒
> │ │ ldp x29, x30, [sp],#48 ▒
> │ │← ret ▒
> │e4:│ mov w19, #0x10000 // #65536 ▒
> │ └──b 90 ◆
> │ec: brk #0x800 ▒
> Press 'h' for help on key bindings
>
> Signed-off-by: Chris Ryder <chris.ryder@....com>
> Signed-off-by: Kim Phillips <kim.phillips@....com>
> Cc: Pawel Moll <pawel.moll@....com>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
> Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
> Cc: linux-perf-users@...r.kernel.org
> Cc: Will Deacon <will.deacon@....com>
> Cc: Mark Rutland <mark.rutland@....com>
> ---
> tools/perf/arch/arm64/annotate/instructions.c | 62 +++++++++++++++++++++++++++
> tools/perf/util/annotate.c | 5 +++
> 2 files changed, 67 insertions(+)
> create mode 100644 tools/perf/arch/arm64/annotate/instructions.c
>
> diff --git a/tools/perf/arch/arm64/annotate/instructions.c b/tools/perf/arch/arm64/annotate/instructions.c
> new file mode 100644
> index 0000000..44eafd6
> --- /dev/null
> +++ b/tools/perf/arch/arm64/annotate/instructions.c
> @@ -0,0 +1,62 @@
> +#include <sys/types.h>
> +#include <regex.h>
> +
> +struct arm64_annotate {
> + regex_t call_insn,
> + jump_insn;
> +};
> +
> +static struct ins_ops *arm64__associate_instruction_ops(struct arch *arch, const char *name)
> +{
> + struct arm64_annotate *arm = arch->priv;
> + struct ins_ops *ops;
> + regmatch_t match[2];
> +
> + if (!regexec(&arm->jump_insn, name, 2, match, 0))
> + ops = &jump_ops;
> + else if (!regexec(&arm->call_insn, name, 2, match, 0))
> + ops = &call_ops;
> + else if (!strcmp(name, "ret"))
> + ops = &ret_ops;
> + else
> + return NULL;
> +
> + arch__associate_ins_ops(arch, name, ops);
> + return ops;
> +}
> +
> +static int arm64__annotate_init(struct arch *arch)
> +{
> + struct arm64_annotate *arm;
> + int err;
> +
> + if (arch->initialized)
> + return 0;
> +
> + arm = zalloc(sizeof(*arm));
> + if (!arm)
> + return -1;
> +
> + /* bl, blr */
> + err = regcomp(&arm->call_insn, "^blr?$", REG_EXTENDED);
> + if (err)
> + goto out_free_arm;
> + /* b, b.cond, br, cbz/cbnz, tbz/tbnz */
> + err = regcomp(&arm->jump_insn, "^[ct]?br?\\.?(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl)?n?z?$",
> + REG_EXTENDED);
> + if (err)
> + goto out_free_call;
> +
> + arch->initialized = true;
> + arch->priv = arm;
> + arch->associate_instruction_ops = arm64__associate_instruction_ops;
> + arch->objdump.comment_char = ';';
> + arch->objdump.skip_functions_char = '+';
> + return 0;
> +
> +out_free_call:
> + regfree(&arm->call_insn);
> +out_free_arm:
> + free(arm);
> + return -1;
> +}
> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> index 3e34ee0..76b8bbf 100644
> --- a/tools/perf/util/annotate.c
> +++ b/tools/perf/util/annotate.c
> @@ -105,6 +105,7 @@ static int arch__associate_ins_ops(struct arch* arch, const char *name, struct i
> }
>
> #include "arch/arm/annotate/instructions.c"
> +#include "arch/arm64/annotate/instructions.c"
> #include "arch/x86/annotate/instructions.c"
> #include "arch/powerpc/annotate/instructions.c"
>
> @@ -114,6 +115,10 @@ static struct arch architectures[] = {
> .init = arm__annotate_init,
> },
> {
> + .name = "arm64",
> + .init = arm64__annotate_init,
> + },
> + {
> .name = "x86",
> .instructions = x86__instructions,
> .nr_instructions = ARRAY_SIZE(x86__instructions),
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