From: Masami Hiramatsu (Google) <mhiramat@kernel.org>
To: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
Jiri Olsa <jolsa@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ian Rogers <irogers@google.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Ingo Molnar <mingo@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-perf-users@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Stephane Eranian <eranian@google.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
linux-toolchains@vger.kernel.org,
linux-trace-devel@vger.kernel.org
Subject: Re: [PATCH 06/48] perf dwarf-aux: Add die_get_scopes() helper
Date: Sun, 5 Nov 2023 18:50:27 +0900 [thread overview]
Message-ID: <20231105185027.c99fe50fb182a44ee6d259ed@kernel.org> (raw)
In-Reply-To: <20231012035111.676789-7-namhyung@kernel.org>
On Wed, 11 Oct 2023 20:50:29 -0700
Namhyung Kim <namhyung@kernel.org> wrote:
> The die_get_scopes() would return the number of enclosing DIEs for the
> given address and it fills an array of DIEs like dwarf_getscopes().
> But it doesn't follow the abstract origin of inlined functions as we
> want information of the concrete instance. This is needed to check the
> location of parameters and local variables properly. Users can check
> the origin separately if needed.
This looks good to me.
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Thanks
>
> Cc: Masami Hiramatsu <mhiramat@kernel.org>
> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
> ---
> tools/perf/util/dwarf-aux.c | 53 +++++++++++++++++++++++++++++++++++++
> tools/perf/util/dwarf-aux.h | 3 +++
> 2 files changed, 56 insertions(+)
>
> diff --git a/tools/perf/util/dwarf-aux.c b/tools/perf/util/dwarf-aux.c
> index adef2635587d..10aa32334d6f 100644
> --- a/tools/perf/util/dwarf-aux.c
> +++ b/tools/perf/util/dwarf-aux.c
> @@ -1425,3 +1425,56 @@ void die_skip_prologue(Dwarf_Die *sp_die, Dwarf_Die *cu_die,
>
> *entrypc = postprologue_addr;
> }
> +
> +/* Internal parameters for __die_find_scope_cb() */
> +struct find_scope_data {
> + /* Target instruction address */
> + Dwarf_Addr pc;
> + /* Number of scopes found [output] */
> + int nr;
> + /* Array of scopes found, 0 for the outermost one. [output] */
> + Dwarf_Die *scopes;
> +};
> +
> +static int __die_find_scope_cb(Dwarf_Die *die_mem, void *arg)
> +{
> + struct find_scope_data *data = arg;
> +
> + if (dwarf_haspc(die_mem, data->pc)) {
> + Dwarf_Die *tmp;
> +
> + tmp = realloc(data->scopes, (data->nr + 1) * sizeof(*tmp));
> + if (tmp == NULL)
> + return DIE_FIND_CB_END;
> +
> + memcpy(tmp + data->nr, die_mem, sizeof(*die_mem));
> + data->scopes = tmp;
> + data->nr++;
> + return DIE_FIND_CB_CHILD;
> + }
> + return DIE_FIND_CB_SIBLING;
> +}
> +
> +/**
> + * die_get_scopes - Return a list of scopes including the address
> + * @cu_die: a compile unit DIE
> + * @pc: the address to find
> + * @scopes: the array of DIEs for scopes (result)
> + *
> + * This function does the same as the dwarf_getscopes() but doesn't follow
> + * the origins of inlined functions. It returns the number of scopes saved
> + * in the @scopes argument. The outer scope will be saved first (index 0) and
> + * the last one is the innermost scope at the @pc.
> + */
> +int die_get_scopes(Dwarf_Die *cu_die, Dwarf_Addr pc, Dwarf_Die **scopes)
> +{
> + struct find_scope_data data = {
> + .pc = pc,
> + };
> + Dwarf_Die die_mem;
> +
> + die_find_child(cu_die, __die_find_scope_cb, &data, &die_mem);
> +
> + *scopes = data.scopes;
> + return data.nr;
> +}
> diff --git a/tools/perf/util/dwarf-aux.h b/tools/perf/util/dwarf-aux.h
> index 4f5d0211ee4f..f9d765f80fb0 100644
> --- a/tools/perf/util/dwarf-aux.h
> +++ b/tools/perf/util/dwarf-aux.h
> @@ -129,6 +129,9 @@ bool die_is_optimized_target(Dwarf_Die *cu_die);
> void die_skip_prologue(Dwarf_Die *sp_die, Dwarf_Die *cu_die,
> Dwarf_Addr *entrypc);
>
> +/* Get the list of including scopes */
> +int die_get_scopes(Dwarf_Die *cu_die, Dwarf_Addr pc, Dwarf_Die **scopes);
> +
> #ifdef HAVE_DWARF_GETLOCATIONS_SUPPORT
>
> /* Get byte offset range of given variable DIE */
> --
> 2.42.0.655.g421f12c284-goog
>
--
Masami Hiramatsu (Google) <mhiramat@kernel.org>
next prev parent reply other threads:[~2023-11-05 9:50 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-12 3:50 [RFC 00/48] perf tools: Introduce data type profiling (v1) Namhyung Kim
2023-10-12 3:50 ` [PATCH 01/48] perf annotate: Move raw_comment and raw_func_start Namhyung Kim
2023-10-12 3:50 ` [PATCH 02/48] perf annotate: Check if operand has multiple regs Namhyung Kim
2023-11-27 19:05 ` Arnaldo Carvalho de Melo
2023-10-12 3:50 ` [PATCH 03/48] perf tools: Add util/debuginfo.[ch] files Namhyung Kim
2023-10-12 3:50 ` [PATCH 04/48] perf dwarf-aux: Fix die_get_typename() for void * Namhyung Kim
2023-11-04 10:52 ` Masami Hiramatsu
2023-10-12 3:50 ` [PATCH 05/48] perf dwarf-aux: Move #ifdef code to the header file Namhyung Kim
2023-11-04 10:59 ` Masami Hiramatsu
2023-10-12 3:50 ` [PATCH 06/48] perf dwarf-aux: Add die_get_scopes() helper Namhyung Kim
2023-11-05 9:50 ` Masami Hiramatsu [this message]
2023-10-12 3:50 ` [PATCH 07/48] perf dwarf-aux: Add die_find_variable_by_reg() helper Namhyung Kim
2023-11-05 9:48 ` Masami Hiramatsu
2023-10-12 3:50 ` [PATCH 08/48] perf dwarf-aux: Factor out __die_get_typename() Namhyung Kim
2023-11-05 9:07 ` Masami Hiramatsu
2023-11-06 4:01 ` Namhyung Kim
2023-10-12 3:50 ` [PATCH 09/48] perf dwarf-regs: Add get_dwarf_regnum() Namhyung Kim
2023-11-05 8:36 ` Masami Hiramatsu
2023-11-06 4:12 ` Namhyung Kim
2023-10-12 3:50 ` [PATCH 10/48] perf annotate-data: Add find_data_type() Namhyung Kim
2023-10-12 3:50 ` [PATCH 11/48] perf annotate-data: Add dso->data_types tree Namhyung Kim
2023-10-12 3:50 ` [PATCH 12/48] perf annotate: Factor out evsel__get_arch() Namhyung Kim
2023-10-12 3:50 ` [PATCH 13/48] perf annotate: Add annotate_get_insn_location() Namhyung Kim
2023-10-23 16:38 ` Arnaldo Carvalho de Melo
2023-10-24 19:10 ` Namhyung Kim
2023-10-26 5:26 ` Namhyung Kim
2023-10-26 19:37 ` Arnaldo Carvalho de Melo
2023-10-12 3:50 ` [PATCH 14/48] perf annotate: Implement hist_entry__get_data_type() Namhyung Kim
2023-10-12 3:50 ` [PATCH 15/48] perf report: Add 'type' sort key Namhyung Kim
2023-10-23 16:53 ` Arnaldo Carvalho de Melo
2023-10-24 19:11 ` Namhyung Kim
2023-10-12 3:50 ` [PATCH 16/48] perf report: Support data type profiling Namhyung Kim
2023-10-12 3:50 ` [PATCH 17/48] perf annotate-data: Add member field in the data type Namhyung Kim
2023-10-12 3:50 ` [PATCH 18/48] perf annotate-data: Update sample histogram for type Namhyung Kim
2023-10-12 3:50 ` [PATCH 19/48] perf report: Add 'typeoff' sort key Namhyung Kim
2023-10-12 3:50 ` [PATCH 20/48] perf report: Add 'symoff' " Namhyung Kim
2023-10-12 3:50 ` [PATCH 21/48] perf annotate: Add --data-type option Namhyung Kim
2023-10-12 3:50 ` [PATCH 22/48] perf annotate: Add --type-stat option for debugging Namhyung Kim
2023-10-23 17:28 ` Arnaldo Carvalho de Melo
2023-10-23 17:40 ` Arnaldo Carvalho de Melo
2023-10-24 19:12 ` Namhyung Kim
2023-10-12 3:50 ` [PATCH 23/48] perf annotate: Add --insn-stat " Namhyung Kim
2023-10-12 3:50 ` [PATCH 24/48] perf annotate-data: Parse 'lock' prefix from llvm-objdump Namhyung Kim
2023-10-12 3:50 ` [PATCH 25/48] perf annotate-data: Handle macro fusion on x86 Namhyung Kim
2023-10-12 3:50 ` [PATCH 26/48] perf annotate-data: Handle array style accesses Namhyung Kim
2023-10-12 3:50 ` [PATCH 27/48] perf annotate-data: Add stack operation pseudo type Namhyung Kim
2023-10-12 3:50 ` [PATCH 28/48] perf dwarf-aux: Add die_find_variable_by_addr() Namhyung Kim
2023-11-06 15:25 ` Masami Hiramatsu
2023-11-09 5:36 ` Namhyung Kim
2023-10-12 3:50 ` [PATCH 29/48] perf annotate-data: Handle PC-relative addressing Namhyung Kim
2023-10-12 3:50 ` [PATCH 30/48] perf annotate-data: Support global variables Namhyung Kim
2023-10-12 3:50 ` [PATCH 31/48] perf dwarf-aux: Add die_get_cfa() Namhyung Kim
2023-11-07 0:50 ` Masami Hiramatsu
2023-11-08 5:28 ` Namhyung Kim
2023-10-12 3:50 ` [PATCH 32/48] perf annotate-data: Support stack variables Namhyung Kim
2023-10-12 3:50 ` [PATCH 33/48] perf dwarf-aux: Check allowed DWARF Ops Namhyung Kim
2023-11-07 9:32 ` Masami Hiramatsu
2023-11-08 5:34 ` Namhyung Kim
2023-10-12 3:50 ` [PATCH 34/48] perf dwarf-aux: Add die_collect_vars() Namhyung Kim
2023-11-08 10:52 ` Masami Hiramatsu
2023-11-09 5:05 ` Namhyung Kim
2023-10-12 3:50 ` [PATCH 35/48] perf dwarf-aux: Handle type transfer for memory access Namhyung Kim
2023-11-08 10:57 ` Masami Hiramatsu
2023-10-12 3:50 ` [PATCH 36/48] perf annotate-data: Introduce struct data_loc_info Namhyung Kim
2023-12-03 16:22 ` Athira Rajeev
2023-12-05 0:10 ` Namhyung Kim
2023-12-05 7:17 ` Athira Rajeev
2023-10-12 3:51 ` [PATCH 37/48] perf map: Add map__objdump_2rip() Namhyung Kim
2023-10-12 3:51 ` [PATCH 38/48] perf annotate: Add annotate_get_basic_blocks() Namhyung Kim
2023-10-12 3:51 ` [PATCH 39/48] perf annotate-data: Maintain variable type info Namhyung Kim
2023-10-12 3:51 ` [PATCH 40/48] perf annotate-data: Add update_insn_state() Namhyung Kim
2023-10-12 3:51 ` [PATCH 41/48] perf annotate-data: Handle global variable access Namhyung Kim
2023-10-12 3:51 ` [PATCH 42/48] perf annotate-data: Handle call instructions Namhyung Kim
2023-10-12 3:51 ` [PATCH 43/48] perf annotate-data: Implement instruction tracking Namhyung Kim
2023-10-12 3:51 ` [PATCH 44/48] perf annotate: Parse x86 segment register location Namhyung Kim
2023-10-12 3:51 ` [PATCH 45/48] perf annotate-data: Handle this-cpu variables in kernel Namhyung Kim
2023-10-12 3:51 ` [PATCH 46/48] perf annotate-data: Track instructions with a this-cpu variable Namhyung Kim
2023-10-12 3:51 ` [PATCH 47/48] perf annotate-data: Add stack canary type Namhyung Kim
2023-10-12 3:51 ` [PATCH 48/48] perf annotate-data: Add debug message Namhyung Kim
2023-10-12 6:03 ` [RFC 00/48] perf tools: Introduce data type profiling (v1) Ingo Molnar
2023-10-12 16:19 ` Namhyung Kim
2023-10-12 18:33 ` Ingo Molnar
2023-10-12 20:45 ` Namhyung Kim
2023-10-12 9:11 ` Peter Zijlstra
2023-10-12 16:41 ` Namhyung Kim
[not found] ` <CADzB+2mu98v9EUsA1Y-wVDSrXT2kznKi87Tb6QdN5y4mMFNsyg@mail.gmail.com>
2023-10-25 5:58 ` Namhyung Kim
2023-10-12 9:15 ` Peter Zijlstra
2023-10-12 16:52 ` Namhyung Kim
2023-10-13 14:15 ` Arnaldo Carvalho de Melo
2023-10-23 21:58 ` Andi Kleen
2023-10-24 19:16 ` Namhyung Kim
2023-10-25 2:09 ` Andi Kleen
2023-10-25 5:51 ` Namhyung Kim
2023-10-25 20:01 ` Andi Kleen
2023-11-08 17:12 ` Joe Mario
2023-11-09 4:48 ` Namhyung Kim
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