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perf tools: Add OCaml demangling

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Detect symbols generated by the OCaml compiler based on their prefix.

Demangle OCaml symbols, returning a newly allocated string (like the
existing Java demangling functionality).

Move a helper function (hex) from tests/code-reading.c to util/string.c

To test:

  echo 'Printf.printf "%d\n" (Random.int 42)' > test.ml
  perf record ocamlopt.opt test.ml
  perf report -d ocamlopt.opt

Signed-off-by: Fabian Hemmer <copy@copy.sh>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LPU-Reference: 20210203211537.b25ytjb6dq5jfbwx@nyu
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Fabian Hemmer
2021-02-03 16:15:37 -05:00
committed by Arnaldo Carvalho de Melo
parent 48859e5293
commit cef7af25c9
11 changed files with 156 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
tools/perf/tests/code-reading.c
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@@ -26,6 +26,7 @@
#include "event.h"
#include "record.h"
#include "util/mmap.h"
#include "util/string2.h"
#include "util/synthetic-events.h"
#include "thread.h"
@@ -41,15 +42,6 @@ struct state {
size_t done_cnt;
};
static unsigned int hex(char c)
{
if (c >= '0' && c <= '9')
return c - '0';
if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
return c - 'A' + 10;
}
static size_t read_objdump_chunk(const char **line, unsigned char **buf,
size_t *buf_len)
{