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| author | He Kuang <hekuang@huawei.com> | 2016-06-03 05:33:12 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-06-07 17:08:52 +0200 |
| commit | f83c04156c1483f16ac548516f41212cf244e441 (patch) | |
| tree | 4880d7dac992ee50993b68758e13ff373b81495e /tools/perf/util/unwind.h | |
| parent | perf unwind: Decouple thread->address_space on libunwind (diff) | |
| download | linux-f83c04156c1483f16ac548516f41212cf244e441.tar.xz linux-f83c04156c1483f16ac548516f41212cf244e441.zip | |
perf unwind: Introduce 'struct unwind_libunwind_ops' for local unwind
Currently, libunwind operations are fixed, and they are chosen according
to the host architecture. This will lead to a problem that if a thread
is run as x86_32 on a x86_64 machine, perf will use libunwind methods
for x86_64 to parse the callchain and get wrong results.
This patch changes the fixed methods of libunwind operations to be
thread/map related, and each thread can have individual libunwind
operations. Local libunwind methods are registered as default value.
Signed-off-by: He Kuang <hekuang@huawei.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1464924803-22214-4-git-send-email-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/unwind.h')
| -rw-r--r-- | tools/perf/util/unwind.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/tools/perf/util/unwind.h b/tools/perf/util/unwind.h index 12790cf94618..bbd73d9bea45 100644 --- a/tools/perf/util/unwind.h +++ b/tools/perf/util/unwind.h @@ -14,6 +14,15 @@ struct unwind_entry { typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg); +struct unwind_libunwind_ops { + int (*prepare_access)(struct thread *thread); + void (*flush_access)(struct thread *thread); + void (*finish_access)(struct thread *thread); + int (*get_entries)(unwind_entry_cb_t cb, void *arg, + struct thread *thread, + struct perf_sample *data, int max_stack); +}; + #ifdef HAVE_DWARF_UNWIND_SUPPORT int unwind__get_entries(unwind_entry_cb_t cb, void *arg, struct thread *thread, |