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Groups > linux.kernel > #1465661
| From | Arnaldo Carvalho de Melo <acme@kernel.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 1/3] perf unwind: Use addr_location::addr instead of ip for entries |
| Date | 2016-08-19 02:50 +0200 |
| Message-ID | <s7Gat-6Ui-5@gated-at.bofh.it> (permalink) |
| References | <s7Gat-6Ui-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Milian Wolff <milian.wolff@kdab.com>
This fixes the srcline translation for call chains of user space
applications.
Before we got:
perf report --stdio --no-children -s sym,srcline -g address
8.92% [.] main mandelbrot.h:41
|
|--3.70%--main +8390240
| __libc_start_main +139950056726769
| _start +8388650
|
|--2.74%--main +8390189
|
--2.08%--main +8390296
__libc_start_main +139950056726769
_start +8388650
7.59% [.] main complex:1326
|
|--4.79%--main +8390203
| __libc_start_main +139950056726769
| _start +8388650
|
--2.80%--main +8390219
7.12% [.] __muldc3 libgcc2.c:1945
|
|--3.76%--__muldc3 +139950060519490
| main +8390224
| __libc_start_main +139950056726769
| _start +8388650
|
--3.32%--__muldc3 +139950060519512
main +8390224
With this patch applied, we instead get:
perf report --stdio --no-children -s sym,srcline -g address
8.92% [.] main mandelbrot.h:41
|
|--3.70%--main mandelbrot.h:41
| __libc_start_main +241
| _start +4194346
|
|--2.74%--main mandelbrot.h:41
|
--2.08%--main mandelbrot.h:41
__libc_start_main +241
_start +4194346
7.59% [.] main complex:1326
|
|--4.79%--main complex:1326
| __libc_start_main +241
| _start +4194346
|
--2.80%--main complex:1326
7.12% [.] __muldc3 libgcc2.c:1945
|
|--3.76%--__muldc3 libgcc2.c:1945
| main mandelbrot.h:39
| __libc_start_main +241
| _start +4194346
|
--3.32%--__muldc3 libgcc2.c:1945
main mandelbrot.h:39
Suggested-and-Acked-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Milian Wolff <milian.wolff@kdab.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LPU-Reference: 20160816153926.11288-1-milian.wolff@kdab.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/unwind-libdw.c | 2 +-
tools/perf/util/unwind-libunwind-local.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/unwind-libdw.c b/tools/perf/util/unwind-libdw.c
index cf5e250bc78e..783a53fb7a4e 100644
--- a/tools/perf/util/unwind-libdw.c
+++ b/tools/perf/util/unwind-libdw.c
@@ -66,7 +66,7 @@ static int entry(u64 ip, struct unwind_info *ui)
if (__report_module(&al, ip, ui))
return -1;
- e->ip = ip;
+ e->ip = al.addr;
e->map = al.map;
e->sym = al.sym;
diff --git a/tools/perf/util/unwind-libunwind-local.c b/tools/perf/util/unwind-libunwind-local.c
index 97c0f8fc5561..20c2e5743903 100644
--- a/tools/perf/util/unwind-libunwind-local.c
+++ b/tools/perf/util/unwind-libunwind-local.c
@@ -542,7 +542,7 @@ static int entry(u64 ip, struct thread *thread,
thread__find_addr_location(thread, PERF_RECORD_MISC_USER,
MAP__FUNCTION, ip, &al);
- e.ip = ip;
+ e.ip = al.addr;
e.map = al.map;
e.sym = al.sym;
--
2.7.4
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[PATCH 1/3] perf unwind: Use addr_location::addr instead of ip for entries Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-08-19 02:50 +0200
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