From: Ian Rogers <irogers@google.com>
To: Nick Gasson <nick.gasson@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/3] perf jvmti: Fix jitdump for methods without debug info
Date: Thu, 14 May 2020 15:06:59 -0700 [thread overview]
Message-ID: <CAP-5=fUJt6bN4egoQ7ohWTPN40YCyf+819iSvH_noggnOHaoKA@mail.gmail.com> (raw)
In-Reply-To: <20200427061520.24905-2-nick.gasson@arm.com>
On Sun, Apr 26, 2020 at 11:16 PM Nick Gasson <nick.gasson@arm.com> wrote:
>
> If a Java class is compiled with -g:none to omit debug information, the
> JVMTI plugin won't write jitdump entries for any method in this class
> and prints a lot of errors like:
>
> java: GetSourceFileName failed with JVMTI_ERROR_ABSENT_INFORMATION
>
> The call to GetSourceFileName is used to derive the file name `fn`, but
> this value is not actually used since commit ca58d7e64bdf ("perf jvmti:
> Generate correct debug information for inlined code") which moved the
> file name lookup into fill_source_filenames(). So the call to
> GetSourceFileName and related code can be safely removed.
>
> Signed-off-by: Nick Gasson <nick.gasson@arm.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Tested-by: Ian Rogers <irogers@google.com>
Thanks!
Ian
> ---
> tools/perf/jvmti/libjvmti.c | 11 -----------
> 1 file changed, 11 deletions(-)
>
> diff --git a/tools/perf/jvmti/libjvmti.c b/tools/perf/jvmti/libjvmti.c
> index c441a34cb1c0..50ef524b5cd4 100644
> --- a/tools/perf/jvmti/libjvmti.c
> +++ b/tools/perf/jvmti/libjvmti.c
> @@ -246,8 +246,6 @@ compiled_method_load_cb(jvmtiEnv *jvmti,
> char *class_sign = NULL;
> char *func_name = NULL;
> char *func_sign = NULL;
> - char *file_name = NULL;
> - char fn[PATH_MAX];
> uint64_t addr = (uint64_t)(uintptr_t)code_addr;
> jvmtiError ret;
> int nr_lines = 0; /* in line_tab[] */
> @@ -282,12 +280,6 @@ compiled_method_load_cb(jvmtiEnv *jvmti,
> }
> }
>
> - ret = (*jvmti)->GetSourceFileName(jvmti, decl_class, &file_name);
> - if (ret != JVMTI_ERROR_NONE) {
> - print_error(jvmti, "GetSourceFileName", ret);
> - goto error;
> - }
> -
> ret = (*jvmti)->GetClassSignature(jvmti, decl_class,
> &class_sign, NULL);
> if (ret != JVMTI_ERROR_NONE) {
> @@ -302,8 +294,6 @@ compiled_method_load_cb(jvmtiEnv *jvmti,
> goto error;
> }
>
> - copy_class_filename(class_sign, file_name, fn, PATH_MAX);
> -
> /*
> * write source line info record if we have it
> */
> @@ -323,7 +313,6 @@ compiled_method_load_cb(jvmtiEnv *jvmti,
> (*jvmti)->Deallocate(jvmti, (unsigned char *)func_name);
> (*jvmti)->Deallocate(jvmti, (unsigned char *)func_sign);
> (*jvmti)->Deallocate(jvmti, (unsigned char *)class_sign);
> - (*jvmti)->Deallocate(jvmti, (unsigned char *)file_name);
> free(line_tab);
> while (line_file_names && (nr_lines > 0)) {
> if (line_file_names[nr_lines - 1]) {
> --
> 2.26.1
>
next prev parent reply other threads:[~2020-05-14 22:07 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-27 6:15 [PATCH 0/3] perf jvmti: Various fixes to JVMTI agent Nick Gasson
2020-04-27 6:15 ` [PATCH 1/3] perf jvmti: Fix jitdump for methods without debug info Nick Gasson
2020-05-14 22:06 ` Ian Rogers [this message]
2020-04-27 6:15 ` [PATCH 2/3] perf jvmti: Do not report error when missing debug information Nick Gasson
2020-05-14 22:08 ` Ian Rogers
2020-05-27 14:07 ` Arnaldo Carvalho de Melo
2020-05-27 14:08 ` Arnaldo Carvalho de Melo
2020-04-27 6:15 ` [PATCH 3/3] perf jvmti: Fix demangling Java symbols Nick Gasson
2020-05-14 22:09 ` Ian Rogers
2020-05-27 14:10 ` Arnaldo Carvalho de Melo
2020-05-27 14:20 ` Arnaldo Carvalho de Melo
2020-05-27 16:23 ` Arnaldo Carvalho de Melo
2020-05-27 22:34 ` Arnaldo Carvalho de Melo
2020-05-28 5:42 ` Nick Gasson
2020-04-27 10:35 ` [PATCH 0/3] perf jvmti: Various fixes to JVMTI agent Jiri Olsa
2020-05-14 8:56 ` Nick Gasson
2020-05-14 13:23 ` Arnaldo Carvalho de Melo
2020-05-14 22:41 ` Ian Rogers
2020-05-15 7:45 ` Nick Gasson
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