On Fri, Sep 22, 2017 at 04:03:27AM -0500, Tor Jeremiassen wrote:
The trace decoder library requires access to the instruction opcodes of the program that was traced in order to be able to decode the trace stream into a series of executed instruction ranges.
This patch implements a function that will be used by the trace decoder interface to enable the trace decoder library to access instruction opcodes stored in DSOs.
Signed-off-by: Tor Jeremiassen tor@ti.com
tools/perf/util/cs-etm.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++++ tools/perf/util/cs-etm.h | 4 ++++ 2 files changed, 53 insertions(+)
diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index 7f12406..354f3b5 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -208,6 +208,55 @@ static void cs_etm__free(struct perf_session *session) zfree(&aux); } +uint32_t cs_etm__mem_access(struct cs_etm_queue *etmq,
uint64_t address,size_t size,uint8_t *buffer)+{
- struct addr_location al;
- uint64_t offset;
- struct thread *thread;
- struct machine *machine;
- uint8_t cpumode;
- int len;
- if (!etmq)
return -1;- machine = etmq->etm->machine;
- if (address >= etmq->etm->kernel_start)
cpumode = PERF_RECORD_MISC_KERNEL;- else
cpumode = PERF_RECORD_MISC_USER;- thread = etmq->thread;
- if (!thread) {
if (cpumode != PERF_RECORD_MISC_KERNEL)return -EINVAL;thread = etmq->etm->unknown_thread;- }
- thread__find_addr_map(thread, cpumode, MAP__FUNCTION, address, &al);
- if (!al.map || !al.map->dso)
return 0;- if (al.map->dso->data.status == DSO_DATA_STATUS_ERROR &&
dso__data_status_seen(al.map->dso, DSO_DATA_STATUS_SEEN_ITRACE))return 0;- offset = al.map->map_ip(al.map, address);
- map__load(al.map);
- len = dso__data_read_offset(al.map->dso, machine, offset, buffer, size);
- if (len <= 0)
return 0;- return len;
+}
static int cs_etm__process_event(struct perf_session *session, union perf_event *event, struct perf_sample *sample, diff --git a/tools/perf/util/cs-etm.h b/tools/perf/util/cs-etm.h index 6139280..d0205a3 100644 --- a/tools/perf/util/cs-etm.h +++ b/tools/perf/util/cs-etm.h @@ -96,4 +96,8 @@ struct auxtrace_buffer; void cs_etm__dump_event(struct cs_etm_auxtrace *etm, struct auxtrace_buffer *buffer); +struct cs_etm_queue;
I moved this up with the other struct declaration.
+uint32_t cs_etm__mem_access(struct cs_etm_queue *etmq, uint64_t address,
size_t size, uint8_t *buffer);#endif
2.7.4
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