perf jit: add source line info support
authorStephane Eranian <eranian@google.com>
Mon, 30 Nov 2015 09:02:23 +0000 (10:02 +0100)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Fri, 5 Feb 2016 15:33:09 +0000 (12:33 -0300)
commit598b7c6919c7bbcc1243009721a01bc12275ff3e
treea774366184bc50f78d124bdb597965b378ec9a9d
parent209045adc2bbdb2b315fa5539cec54d01cd3e7db
perf jit: add source line info support

This patch adds source line information support to perf for jitted code.

The source line info must be emitted by the runtime, such as JVMTI.

Perf injects extract the source line info from the jitdump file and adds
the corresponding .debug_lines section in the ELF image generated for
each jitted function.

The source line enables matching any address in the profile with a
source file and line number.

The improvement is visible in perf annotate with the source code
displayed alongside the assembly code.

The dwarf code leverages the support from OProfile which is also
released under GPLv2.  Copyright 2007 OProfile authors.

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Carl Love <cel@us.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John McCutchan <johnmccutchan@google.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sonny Rao <sonnyrao@chromium.org>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1448874143-7269-5-git-send-email-eranian@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/jvmti/jvmti_agent.c
tools/perf/jvmti/jvmti_agent.h
tools/perf/jvmti/libjvmti.c
tools/perf/util/Build
tools/perf/util/genelf.c
tools/perf/util/genelf.h
tools/perf/util/genelf_debug.c [new file with mode: 0644]
tools/perf/util/jitdump.c