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Subject[PATCH 07/12] perf script: Pad dso name for --call-trace
Date
Padding dso name for --call-trace so we don't have the
indent screwed by different dso name lengths, as now
for kernel there's also bpf code displayed.

# perf-with-kcore record pt -e intel_pt//ku -- sleep 1
# perf-core/perf-with-kcore script pt --call-trace

Before:
sleep 36660 [016] 1057036.806464404: ([kernel.kallsyms]) kretprobe_perf_func
sleep 36660 [016] 1057036.806464404: ([kernel.kallsyms]) trace_call_bpf
sleep 36660 [016] 1057036.806464404: ([kernel.kallsyms]) __x86_indirect_thunk_rax
sleep 36660 [016] 1057036.806464404: ([kernel.kallsyms]) __x86_indirect_thunk_rax
sleep 36660 [016] 1057036.806464725: (bpf_prog_da4fe6b3d2c29b25_trace_return) bpf_get_current_pid_tgid
sleep 36660 [016] 1057036.806464725: (bpf_prog_da4fe6b3d2c29b25_trace_return) bpf_ktime_get_ns
sleep 36660 [016] 1057036.806464725: ([kernel.kallsyms]) __x86_indirect_thunk_rax
sleep 36660 [016] 1057036.806464725: ([kernel.kallsyms]) __x86_indirect_thunk_rax
sleep 36660 [016] 1057036.806465045: (bpf_prog_da4fe6b3d2c29b25_trace_return) __htab_map_lookup_elem
sleep 36660 [016] 1057036.806465366: ([kernel.kallsyms]) memcmp
sleep 36660 [016] 1057036.806465687: (bpf_prog_da4fe6b3d2c29b25_trace_return) bpf_probe_read
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms]) probe_kernel_read
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms]) __check_object_size
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms]) check_stack_object
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms]) copy_user_enhanced_fast_string
sleep 36660 [016] 1057036.806465687: (bpf_prog_da4fe6b3d2c29b25_trace_return) bpf_probe_read
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms]) probe_kernel_read
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms]) __check_object_size
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms]) check_stack_object
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms]) copy_user_enhanced_fast_string
sleep 36660 [016] 1057036.806466008: (bpf_prog_da4fe6b3d2c29b25_trace_return) bpf_get_current_uid_gid
sleep 36660 [016] 1057036.806466008: ([kernel.kallsyms]) from_kgid
sleep 36660 [016] 1057036.806466008: ([kernel.kallsyms]) from_kuid
sleep 36660 [016] 1057036.806466008: (bpf_prog_da4fe6b3d2c29b25_trace_return) bpf_perf_event_output
sleep 36660 [016] 1057036.806466328: ([kernel.kallsyms]) perf_event_output
sleep 36660 [016] 1057036.806466328: ([kernel.kallsyms]) perf_prepare_sample
sleep 36660 [016] 1057036.806466328: ([kernel.kallsyms]) perf_misc_flags
sleep 36660 [016] 1057036.806466328: ([kernel.kallsyms]) __x86_indirect_thunk_rax
sleep 36660 [016] 1057036.806466328: ([kernel.kallsyms]) __x86_indirect_thunk_rax
sleep 36660 [016] 1057036.806466328: ([kvm]) kvm_is_in_guest
sleep 36660 [016] 1057036.806466649: ([kernel.kallsyms]) __perf_event_header__init_id.isra.0
sleep 36660 [016] 1057036.806466649: ([kernel.kallsyms]) perf_output_begin

After:
sleep 36660 [016] 1057036.806464404: ([kernel.kallsyms] ) kretprobe_perf_func
sleep 36660 [016] 1057036.806464404: ([kernel.kallsyms] ) trace_call_bpf
sleep 36660 [016] 1057036.806464404: ([kernel.kallsyms] ) __x86_indirect_thunk_rax
sleep 36660 [016] 1057036.806464404: ([kernel.kallsyms] ) __x86_indirect_thunk_rax
sleep 36660 [016] 1057036.806464725: (bpf_prog_da4fe6b3d2c29b25_trace_return ) bpf_get_current_pid_tgid
sleep 36660 [016] 1057036.806464725: (bpf_prog_da4fe6b3d2c29b25_trace_return ) bpf_ktime_get_ns
sleep 36660 [016] 1057036.806464725: ([kernel.kallsyms] ) __x86_indirect_thunk_rax
sleep 36660 [016] 1057036.806464725: ([kernel.kallsyms] ) __x86_indirect_thunk_rax
sleep 36660 [016] 1057036.806465045: (bpf_prog_da4fe6b3d2c29b25_trace_return ) __htab_map_lookup_elem
sleep 36660 [016] 1057036.806465366: ([kernel.kallsyms] ) memcmp
sleep 36660 [016] 1057036.806465687: (bpf_prog_da4fe6b3d2c29b25_trace_return ) bpf_probe_read
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] ) probe_kernel_read
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] ) __check_object_size
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] ) check_stack_object
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] ) copy_user_enhanced_fast_string
sleep 36660 [016] 1057036.806465687: (bpf_prog_da4fe6b3d2c29b25_trace_return ) bpf_probe_read
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] ) probe_kernel_read
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] ) __check_object_size
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] ) check_stack_object
sleep 36660 [016] 1057036.806465687: ([kernel.kallsyms] ) copy_user_enhanced_fast_string
sleep 36660 [016] 1057036.806466008: (bpf_prog_da4fe6b3d2c29b25_trace_return ) bpf_get_current_uid_gid
sleep 36660 [016] 1057036.806466008: ([kernel.kallsyms] ) from_kgid
sleep 36660 [016] 1057036.806466008: ([kernel.kallsyms] ) from_kuid
sleep 36660 [016] 1057036.806466008: (bpf_prog_da4fe6b3d2c29b25_trace_return ) bpf_perf_event_output
sleep 36660 [016] 1057036.806466328: ([kernel.kallsyms] ) perf_event_output
sleep 36660 [016] 1057036.806466328: ([kernel.kallsyms] ) perf_prepare_sample
sleep 36660 [016] 1057036.806466328: ([kernel.kallsyms] ) perf_misc_flags
sleep 36660 [016] 1057036.806466328: ([kernel.kallsyms] ) __x86_indirect_thunk_rax
sleep 36660 [016] 1057036.806466328: ([kernel.kallsyms] ) __x86_indirect_thunk_rax

Link: http://lkml.kernel.org/n/tip-99g9rg4p20a1o99vr0nkjhq8@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/include/linux/kernel.h | 1 +
tools/lib/vsprintf.c | 19 +++++++++++++++++++
tools/perf/builtin-script.c | 1 +
tools/perf/util/map.c | 6 ++++++
tools/perf/util/symbol_conf.h | 1 +
5 files changed, 28 insertions(+)

diff --git a/tools/include/linux/kernel.h b/tools/include/linux/kernel.h
index 857d9e22826e..cba226948a0c 100644
--- a/tools/include/linux/kernel.h
+++ b/tools/include/linux/kernel.h
@@ -102,6 +102,7 @@

int vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
int scnprintf(char * buf, size_t size, const char * fmt, ...);
+int scnprintf_pad(char * buf, size_t size, const char * fmt, ...);

#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))

diff --git a/tools/lib/vsprintf.c b/tools/lib/vsprintf.c
index e08ee147eab4..8780b4cdab21 100644
--- a/tools/lib/vsprintf.c
+++ b/tools/lib/vsprintf.c
@@ -23,3 +23,22 @@ int scnprintf(char * buf, size_t size, const char * fmt, ...)

return (i >= ssize) ? (ssize - 1) : i;
}
+
+int scnprintf_pad(char * buf, size_t size, const char * fmt, ...)
+{
+ ssize_t ssize = size;
+ va_list args;
+ int i;
+
+ va_start(args, fmt);
+ i = vscnprintf(buf, size, fmt, args);
+ va_end(args);
+
+ if (i < (int) size) {
+ for (; i < (int) size; i++)
+ buf[i] = ' ';
+ buf[i] = 0x0;
+ }
+
+ return (i >= ssize) ? (ssize - 1) : i;
+}
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 61cfd8f70989..7adaa6c63a0b 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -3297,6 +3297,7 @@ static int parse_call_trace(const struct option *opt __maybe_unused,
parse_output_fields(NULL, "-ip,-addr,-event,-period,+callindent", 0);
itrace_parse_synth_opts(opt, "cewp", 0);
symbol_conf.nanosecs = true;
+ symbol_conf.pad_output_len_dso = 50;
return 0;
}

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index ee71efb9db62..6fce983c6115 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -405,6 +405,7 @@ size_t map__fprintf(struct map *map, FILE *fp)

size_t map__fprintf_dsoname(struct map *map, FILE *fp)
{
+ char buf[symbol_conf.pad_output_len_dso + 1];
const char *dsoname = "[unknown]";

if (map && map->dso) {
@@ -414,6 +415,11 @@ size_t map__fprintf_dsoname(struct map *map, FILE *fp)
dsoname = map->dso->name;
}

+ if (symbol_conf.pad_output_len_dso) {
+ scnprintf_pad(buf, symbol_conf.pad_output_len_dso, "%s", dsoname);
+ dsoname = buf;
+ }
+
return fprintf(fp, "%s", dsoname);
}

diff --git a/tools/perf/util/symbol_conf.h b/tools/perf/util/symbol_conf.h
index 6c55fa6fccec..382ba63fc554 100644
--- a/tools/perf/util/symbol_conf.h
+++ b/tools/perf/util/symbol_conf.h
@@ -69,6 +69,7 @@ struct symbol_conf {
*tid_list;
const char *symfs;
int res_sample;
+ int pad_output_len_dso;
};

extern struct symbol_conf symbol_conf;
--
2.20.1
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