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Date: Wed, 29 Mar 2023 17:15:12 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>,
Adrian Hunter <adrian.hunter@...el.com>,
Nathan Chancellor <nathan@...nel.org>,
Nick Desaulniers <ndesaulniers@...gle.com>,
Tom Rix <trix@...hat.com>, James Clark <james.clark@....com>,
Andi Kleen <ak@...ux.intel.com>,
Kan Liang <kan.liang@...ux.intel.com>,
German Gomez <german.gomez@....com>,
Sandipan Das <sandipan.das@....com>,
Andres Freund <andres@...razel.de>,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
llvm@...ts.linux.dev
Subject: Re: [PATCH v1 6/6] perf symbol: Add command line support for
addr2line path
Hi ian,
On Tue, Mar 28, 2023 at 4:56 PM Ian Rogers <irogers@...gle.com> wrote:
>
> Allow addr2line to be set either on the command line or via the
> perfconfig file. This doesn't currently work with llvm-addr2line as
> the addr2line code emits two things:
> 1) the address to decode,
> 2) a bogus ',' value.
> The expectation is the bogus value will generate:
> ??
> ??:0
> that terminates the addr2line reading. However, the output from
> llvm-addr2line is a single line with just the input ',' locking up the
> addr2line reading that is expecting a second line.
Yeah, I remember that when I tried to llvm-addr2line support.
Thanks for pointing it out. Have you reported it to the LLVM
community or even sent a fix? :)
Thanks,
Namhyung
>
> Signed-off-by: Ian Rogers <irogers@...gle.com>
> ---
> tools/perf/Documentation/perf-annotate.txt | 3 +++
> tools/perf/Documentation/perf-config.txt | 3 +++
> tools/perf/Documentation/perf-report.txt | 3 +++
> tools/perf/Documentation/perf-top.txt | 6 +++++
> tools/perf/builtin-annotate.c | 9 +++++++-
> tools/perf/builtin-report.c | 9 +++++++-
> tools/perf/builtin-top.c | 10 +++++++--
> tools/perf/util/annotate.c | 6 +++++
> tools/perf/util/srcline.c | 26 +++++++++++++---------
> tools/perf/util/symbol_conf.h | 1 +
> 10 files changed, 62 insertions(+), 14 deletions(-)
>
> diff --git a/tools/perf/Documentation/perf-annotate.txt b/tools/perf/Documentation/perf-annotate.txt
> index 980fe2c29275..fe168e8165c8 100644
> --- a/tools/perf/Documentation/perf-annotate.txt
> +++ b/tools/perf/Documentation/perf-annotate.txt
> @@ -116,6 +116,9 @@ include::itrace.txt[]
> -M::
> --disassembler-style=:: Set disassembler style for objdump.
>
> +--addr2line=<path>::
> + Path to addr2line binary.
> +
> --objdump=<path>::
> Path to objdump binary.
>
> diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt
> index 697f7f924545..e56ae54805a8 100644
> --- a/tools/perf/Documentation/perf-config.txt
> +++ b/tools/perf/Documentation/perf-config.txt
> @@ -250,6 +250,9 @@ annotate.*::
> These are in control of addresses, jump function, source code
> in lines of assembly code from a specific program.
>
> + annotate.addr2line::
> + addr2line binary to use for file names and line numbers.
> +
> annotate.objdump::
> objdump binary to use for disassembly and annotations.
>
> diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
> index cfd502f7e6da..af068b4f1e5a 100644
> --- a/tools/perf/Documentation/perf-report.txt
> +++ b/tools/perf/Documentation/perf-report.txt
> @@ -381,6 +381,9 @@ OPTIONS
> This allows to examine the path the program took to each sample.
> The data collection must have used -b (or -j) and -g.
>
> +--addr2line=<path>::
> + Path to addr2line binary.
> +
> --objdump=<path>::
> Path to objdump binary.
>
> diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt
> index c60e615b7183..619cc8143ad5 100644
> --- a/tools/perf/Documentation/perf-top.txt
> +++ b/tools/perf/Documentation/perf-top.txt
> @@ -161,6 +161,12 @@ Default is to monitor all CPUS.
> -M::
> --disassembler-style=:: Set disassembler style for objdump.
>
> +--addr2line=<path>::
> + Path to addr2line binary.
> +
> +--objdump=<path>::
> + Path to objdump binary.
> +
> --prefix=PREFIX::
> --prefix-strip=N::
> Remove first N entries from source file path names in executables
> diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
> index d781639b644f..ec276db3e5dd 100644
> --- a/tools/perf/builtin-annotate.c
> +++ b/tools/perf/builtin-annotate.c
> @@ -516,7 +516,7 @@ int cmd_annotate(int argc, const char **argv)
> struct itrace_synth_opts itrace_synth_opts = {
> .set = 0,
> };
> - const char *disassembler_style = NULL, *objdump_path = NULL;
> + const char *disassembler_style = NULL, *objdump_path = NULL, *addr2line_path = NULL;
> struct option options[] = {
> OPT_STRING('i', "input", &input_name, "file",
> "input file name"),
> @@ -569,6 +569,8 @@ int cmd_annotate(int argc, const char **argv)
> "Strip first N entries of source file path name in programs (with --prefix)"),
> OPT_STRING(0, "objdump", &objdump_path, "path",
> "objdump binary to use for disassembly and annotations"),
> + OPT_STRING(0, "addr2line", &addr2line_path, "path",
> + "addr2line binary to use for line numbers"),
> OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
> "Enable symbol demangling"),
> OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
> @@ -628,6 +630,11 @@ int cmd_annotate(int argc, const char **argv)
> if (!annotate.opts.objdump_path)
> return -ENOMEM;
> }
> + if (addr2line_path) {
> + symbol_conf.addr2line_path = strdup(addr2line_path);
> + if (!symbol_conf.addr2line_path)
> + return -ENOMEM;
> + }
>
> if (annotate_check_args(&annotate.opts) < 0)
> return -EINVAL;
> diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> index 15b0cf649e1a..4011abc03d0d 100644
> --- a/tools/perf/builtin-report.c
> +++ b/tools/perf/builtin-report.c
> @@ -1226,7 +1226,7 @@ int cmd_report(int argc, const char **argv)
> };
> char *sort_order_help = sort_help("sort by key(s):");
> char *field_order_help = sort_help("output field(s): overhead period sample ");
> - const char *disassembler_style = NULL, *objdump_path = NULL;
> + const char *disassembler_style = NULL, *objdump_path = NULL, *addr2line_path = NULL;
> const struct option options[] = {
> OPT_STRING('i', "input", &input_name, "file",
> "input file name"),
> @@ -1344,6 +1344,8 @@ int cmd_report(int argc, const char **argv)
> "add last branch records to call history"),
> OPT_STRING(0, "objdump", &objdump_path, "path",
> "objdump binary to use for disassembly and annotations"),
> + OPT_STRING(0, "addr2line", &addr2line_path, "path",
> + "addr2line binary to use for line numbers"),
> OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
> "Disable symbol demangling"),
> OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
> @@ -1430,6 +1432,11 @@ int cmd_report(int argc, const char **argv)
> if (!report.annotation_opts.objdump_path)
> return -ENOMEM;
> }
> + if (addr2line_path) {
> + symbol_conf.addr2line_path = strdup(addr2line_path);
> + if (!symbol_conf.addr2line_path)
> + return -ENOMEM;
> + }
>
> if (annotate_check_args(&report.annotation_opts) < 0) {
> ret = -EINVAL;
> diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
> index 57a273cd03de..82c6c065830d 100644
> --- a/tools/perf/builtin-top.c
> +++ b/tools/perf/builtin-top.c
> @@ -1439,7 +1439,7 @@ int cmd_top(int argc, const char **argv)
> };
> struct record_opts *opts = &top.record_opts;
> struct target *target = &opts->target;
> - const char *disassembler_style = NULL, *objdump_path = NULL;
> + const char *disassembler_style = NULL, *objdump_path = NULL, *addr2line_path = NULL;
> const struct option options[] = {
> OPT_CALLBACK('e', "event", &top.evlist, "event",
> "event selector. use 'perf list' to list available events",
> @@ -1527,6 +1527,8 @@ int cmd_top(int argc, const char **argv)
> OPT_BOOLEAN(0, "no-bpf-event", &top.record_opts.no_bpf_event, "do not record bpf events"),
> OPT_STRING(0, "objdump", &objdump_path, "path",
> "objdump binary to use for disassembly and annotations"),
> + OPT_STRING(0, "addr2line", &addr2line_path, "path",
> + "addr2line binary to use for line numbers"),
> OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
> "Specify disassembler style (e.g. -M intel for intel syntax)"),
> OPT_STRING(0, "prefix", &top.annotation_opts.prefix, "prefix",
> @@ -1629,7 +1631,11 @@ int cmd_top(int argc, const char **argv)
> if (!top.annotation_opts.objdump_path)
> return -ENOMEM;
> }
> -
> + if (addr2line_path) {
> + symbol_conf.addr2line_path = strdup(addr2line_path);
> + if (!symbol_conf.addr2line_path)
> + return -ENOMEM;
> + }
>
> status = symbol__validate_sym_arguments();
> if (status)
> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> index 3eaa9b2df6c4..3e5df90e11f8 100644
> --- a/tools/perf/util/annotate.c
> +++ b/tools/perf/util/annotate.c
> @@ -3217,6 +3217,12 @@ static int annotation__config(const char *var, const char *value, void *data)
> pr_err("Not enough memory for annotate.objdump\n");
> return -1;
> }
> + } else if (!strcmp(var, "annotate.addr2line")) {
> + symbol_conf.addr2line_path = strdup(value);
> + if (!symbol_conf.addr2line_path) {
> + pr_err("Not enough memory for annotate.addr2line\n");
> + return -1;
> + }
> } else if (!strcmp(var, "annotate.demangle")) {
> symbol_conf.demangle = perf_config_bool("demangle", value);
> } else if (!strcmp(var, "annotate.demangle_kernel")) {
> diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c
> index 33321867416b..f0a96a834e4b 100644
> --- a/tools/perf/util/srcline.c
> +++ b/tools/perf/util/srcline.c
> @@ -414,9 +414,14 @@ static void addr2line_subprocess_cleanup(struct a2l_subprocess *a2l)
> free(a2l);
> }
>
> -static struct a2l_subprocess *addr2line_subprocess_init(const char *path)
> -{
> - const char *argv[] = { "addr2line", "-e", path, "-i", "-f", NULL };
> +static struct a2l_subprocess *addr2line_subprocess_init(const char *addr2line_path,
> + const char *binary_path)
> +{
> + const char *argv[] = {
> + addr2line_path ?: "addr2line",
> + "-e", binary_path,
> + "-i", "-f", NULL
> + };
> struct a2l_subprocess *a2l = zalloc(sizeof(*a2l));
> int start_command_status = 0;
>
> @@ -436,21 +441,22 @@ static struct a2l_subprocess *addr2line_subprocess_init(const char *path)
> a2l->addr2line.argv = NULL; /* it's not used after start_command; avoid dangling pointers */
>
> if (start_command_status != 0) {
> - pr_warning("could not start addr2line for %s: start_command return code %d\n",
> - path,
> - start_command_status);
> + pr_warning("could not start addr2line (%s) for %s: start_command return code %d\n",
> + addr2line_path, binary_path, start_command_status);
> goto out;
> }
>
> a2l->to_child = fdopen(a2l->addr2line.in, "w");
> if (a2l->to_child == NULL) {
> - pr_warning("could not open write-stream to addr2line of %s\n", path);
> + pr_warning("could not open write-stream to addr2line (%s) of %s\n",
> + addr2line_path, binary_path);
> goto out;
> }
>
> a2l->from_child = fdopen(a2l->addr2line.out, "r");
> if (a2l->from_child == NULL) {
> - pr_warning("could not open read-stream from addr2line of %s\n", path);
> + pr_warning("could not open read-stream from addr2line (%s) of %s\n",
> + addr2line_path, binary_path);
> goto out;
> }
>
> @@ -490,7 +496,6 @@ static int read_addr2line_record(struct a2l_subprocess *a2l,
>
> if (getline(&line, &line_len, a2l->from_child) < 0 || !line_len)
> goto error;
> -
> if (function != NULL)
> *function = strdup(strim(line));
>
> @@ -553,7 +558,8 @@ static int addr2line(const char *dso_name, u64 addr,
> if (!filename__has_section(dso_name, ".debug_line"))
> goto out;
>
> - dso->a2l = addr2line_subprocess_init(dso_name);
> + dso->a2l = addr2line_subprocess_init(symbol_conf.addr2line_path,
> + dso_name);
> a2l = dso->a2l;
> }
>
> diff --git a/tools/perf/util/symbol_conf.h b/tools/perf/util/symbol_conf.h
> index bc3d046fbb63..5accd8e69ad2 100644
> --- a/tools/perf/util/symbol_conf.h
> +++ b/tools/perf/util/symbol_conf.h
> @@ -61,6 +61,7 @@ struct symbol_conf {
> *sym_list_str,
> *col_width_list_str,
> *bt_stop_list_str;
> + char *addr2line_path;
> unsigned long time_quantum;
> struct strlist *dso_list,
> *comm_list,
> --
> 2.40.0.348.gf938b09366-goog
>
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